release: 1.0.0 beta 22

Implemented full tgapi method coverage from Telegram docs, aligned numeric ID/file_size types, and fixed method signatures/JSON tags.; Standardized GoDoc across exported APIs with Telegram links and refreshed README sections for MsgContext plus API/Uploader usage.

Makefile

@@ -0,0 +1,15 @@
+# Проверка наличия golangci-lint
+GO_LINT := $(shell command -v golangci-lint 2>/dev/null)
+
+# Цель: запуск всех проверок кода
+check:
+	@echo "🔍 Running code checks..."
+	@go mod tidy -v
+	@go vet ./...
+	@if [ -n "$(GO_LINT)" ]; then \
+		echo "✅ golangci-lint found, running..." && \
+		golangci-lint run --timeout=5m --verbose; \
+	else \
+		echo "⚠️  golangci-lint not installed. Install with: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.57.2"; \
+	fi
+	@go test -race -v ./... 2>/dev/null || echo "⚠️  Tests skipped or failed (run manually with 'go test -race ./...')"

README.md

@@ -1,3 +1,218 @@
 # Laniakea
 
-A lightweight, easy to use and performance Telegram API wrapper for bot development.
+[![Go Version](https://img.shields.io/badge/Go-1.24+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
+[![License: GPL-3.0](https://img.shields.io/badge/License-GPL%203.0-blue.svg?style=flat-square)](LICENSE)
+![Gitea Release](https://img.shields.io/gitea/v/release/ScuroNeko/Laniakea?gitea_url=https%3A%2F%2Fgit.nix13.pw&sort=semver&display_name=release&style=flat-square&color=purple&link=https%3A%2F%2Fgit.nix13.pw%2FScuroNeko%2FLaniakea%2Freleases)
+
+A lightweight, easy-to-use, and performant Telegram Bot API wrapper for Go. It simplifies bot development with a clean plugin system, middleware support, automatic command generation, and built-in rate limiting.
+
+[На русском](README_RU.md)
+
+---
+
+## ✨ Features
+*   **Simple & Intuitive API:** Designed for ease of use, based on practical examples.
+*   **Plugin System:** Organize your bot's functionality into independent, reusable plugins.
+*   **Command Handling:** Easily register commands and extract arguments.
+*   **Middleware Support:** Run code before or after commands (e.g., logging, access control).
+*   **Automatic Command Generation:** Generate help and command lists automatically.
+*   **Built-in Rate Limiting:** Protect your bot from hitting Telegram API limits (supports `retry_after` handling).
+*   **Context-Aware:** Pass custom database or state contexts to your handlers.
+*   **Fluent Interface:** Chain methods for clean configuration (e.g., `bot.ErrorTemplate(...).AddPlugins(...)`).
+
+---
+
+## 📦 Installation
+
+```bash
+go get git.nix13.pw/scuroneko/laniakea
+```
+
+## 🚀 Quick Start (with step-by-step explanation)
+
+Here is a minimal echo/ping bot example with detailed comments.
+```go
+package main
+
+import (
+	"log"
+
+	"git.nix13.pw/scuroneko/laniakea" // Import the Laniakea library
+)
+
+// echo is a command handler function.
+// It receives two parameters:
+//   - ctx: the message context (contains info about the message, sender, chat, etc.)
+//   - db: your custom database context (here we use NoDB, a placeholder for no database)
+func echo(ctx *laniakea.MsgContext, db *laniakea.NoDB) {
+	// Answer the user with the text they sent, without any command prefix.
+	// ctx.Text contains the user's message with the command part stripped off.
+	ctx.Answer(ctx.Text) // User input WITHOUT command
+}
+
+func main() {
+	// 1. Create bot options. Replace "TOKEN" with your actual bot token from @BotFather.
+	opts := &laniakea.BotOpts{Token: "TOKEN"}
+
+	// 2. Initialize a new bot instance.
+	//    We use laniakea.NoDB as the database context type (no database needed for this example).
+	bot := laniakea.NewBot[laniakea.NoDB](opts)
+	// Ensure bot resources are cleaned up on exit.
+	defer bot.Close()
+
+	// 3. Create a new plugin named "ping".
+	//    Plugins help group related commands and middlewares.
+	p := laniakea.NewPlugin[laniakea.NoDB]("ping")
+
+	// 4. Add a command to the plugin.
+	//    p.NewCommand(echo, "echo") creates a command that triggers the 'echo' function on the "/echo" command.
+	p.AddCommand(p.NewCommand(echo, "echo"))
+
+	// 5. Add another command using an anonymous function (closure).
+	//    This command simply replies "Pong" when the user sends "/ping".
+	p.AddCommand(p.NewCommand(func(ctx *laniakea.MsgContext, db *laniakea.NoDB) {
+		ctx.Answer("Pong")
+	}, "ping"))
+
+	// 6. Configure the bot with a custom error template and add the plugin.
+	//    ErrorTemplate sets a format string for errors (where %s will be replaced by the actual error).
+	//    AddPlugins(p) registers our "ping" plugin with the bot.
+	bot = bot.ErrorTemplate("Error\n\n%s").AddPlugins(p)
+
+	// 7. Automatically generate commands like /start, /help, and a list of all registered commands.
+	//    This is optional but very useful for most bots.
+	if err := bot.AutoGenerateCommands(); err != nil {
+		log.Println(err)
+	}
+
+	// 8. Start the bot, listening for updates (long polling).
+	bot.Run()
+}
+```
+
+### How It Works
+1. `BotOpts`: Holds configuration like the API token.
+2. `NewBot[T]`: Creates a bot instance. The type parameter T allows you to pass a custom database context (e.g., *sql.DB) that will be available in all handlers. Use laniakea.NoDB if you don't need it.
+3. `NewPlugin`: Creates a logical group for commands and middlewares.
+4. `AddCommand`: Registers a command. The first argument is the handler function (func(*MsgContext, T)), the second is the command name (without the slash).
+5. **Handler Functions**: Receive *MsgContext (message details, methods like Answer) and your custom database context T.
+6. `ErrorTemplate`: Sets a template for error messages. The %s placeholder is replaced by the actual error.
+7. `AutoGenerateCommands`: Adds built-in commands (/start, /help) and a command that lists all available commands.
+8. `Run()`: Starts the bot's update polling loop.
+
+## 📖 Core Concepts
+### Plugins
+
+Plugins are the main way to organize code. A plugin can have multiple commands and middlewares.
+```go
+plugin := laniakea.NewPlugin[MyDB]("admin")
+plugin.AddCommand(plugin.NewCommand(banUser, "ban"))
+bot.AddPlugins(plugin)
+```
+
+### Commands
+
+A command is a function that handles a specific bot command (e.g., /start).
+```go
+func myHandler(ctx *laniakea.MsgContext, db *MyDB) {
+    // Access command arguments via ctx.Args ([]string)
+    // Reply to the user: ctx.Answer("some text")
+}
+```
+
+### MsgContext
+
+Provides access to the incoming message and useful reply methods:
+
+- `Answer(text string) *AnswerMessage`: Sends a message with parse_mode none.
+- `AnswerMarkdown(text string) *AnswerMessage`: Sends a message formatted with MarkdownV2 (you handle escaping).
+- `Keyboard(text string, keyboard *InlineKeyboard) *AnswerMessage`: Sends a message with parse_mode none and inline keyboard.
+- `KeyboardMarkdown(text string, keyboard *InlineKeyboard) *AnswerMessage`: Sends a message formatted with MarkdownV2 (you handle escaping) and inline keyboard.
+- `AnswerPhoto(photoId, text string) *AnswerMessage`: Sends a message with photo with parse_mode none.
+- `AnswerPhotoMarkdown(photoId, text string) *AnswerMessage`: Sends a photo with MarkdownV2 caption (you handle escaping).
+- `EditCallback(text string)`: Edits message with parse_mode none after clicking inline button.
+- `EditCallbackMarkdown(text string)`: Edits a message formatted with MarkdownV2 (you handle escaping) after clicking inline button.
+- `SendAction(action tgapi.ChatActionType)`: Sends a “typing”, “uploading photo”, etc., action.
+- Fields: `Text`, `Args`, `From`, `FromID`, `Msg`, `InlineMsgId`, `CallbackQueryId`, etc.
+- And more methods and fields!
+
+### tgapi: API and Uploader
+
+`tgapi` provides two clients:
+
+- `API` for JSON requests (e.g., `SendMessage`, `EditMessageText`, methods using file_id/URL).
+- `Uploader` for multipart uploads (e.g., `SendPhoto`, `SendDocument`, `SendVideo` with binary files).
+
+This split keeps method intent explicit: JSON-only calls go through `API`, file uploads go through `Uploader`.
+
+### Database Context
+
+The `T` in `NewBot[T]` is a powerful feature. You can pass any type (like a database connection pool), and it will be available in every command and middleware handler.
+
+```go
+type MyDB struct { /* ... */ }
+db := &MyDB{...}
+bot := laniakea.NewBot[*MyDB](opts, db) // Pass db instance
+```
+
+## 🧩 Middleware
+Middleware are functions that run before a command handler. They are perfect for cross-cutting concerns like logging, access control, rate limiting, or modifying the context.
+
+### Signature
+A middleware function has the same signature as a command handler, but it must return a bool:
+
+```go
+func(ctx *MsgContext, db T) bool
+```
+
+- If it returns true, the next middleware (or the command) will be executed.
+- If it returns false, the execution chain stops immediately (the command will not run).
+
+### Adding Middleware
+Use the Use method of a plugin to add one or more middleware functions. They are executed in the order they are added.
+
+```go
+plugin := laniakea.NewPlugin[MyDB]("admin")
+plugin.Use(loggingMiddleware, adminOnlyMiddleware)
+plugin.AddCommand(plugin.NewCommand(banUser, "ban"))
+```
+
+### Example Middlewares
+
+1. Logging Middleware – logs every command execution.
+```go
+func loggingMiddleware(ctx *laniakea.MsgContext, db *MyDB) bool {
+    log.Printf("User %d executed command: %s", ctx.FromID, ctx.Msg.Text)
+    return true // continue to next middleware/command
+}
+```
+
+2. Admin-Only Middleware – restricts access to users with a specific role.
+```go
+func adminOnlyMiddleware(ctx *laniakea.MsgContext, db *MyDB) bool {
+    if !db.IsAdmin(ctx.FromID) { // assume db has IsAdmin method
+        ctx.Answer("⛔ Access denied. Admins only.")
+        return false // stop execution
+    }
+    return true
+}
+```
+
+### Important Notes
+- Middleware can modify the MsgContext (e.g., add custom fields) before the command runs.
+
+## ⚙️ Advanced Configuration
+- **Inline Keyboards**: Build keyboards using `laniakea.NewInlineKeyboardJson`, `laniakea.NewInlineKeyboardBase64`, or `laniakea.NewInlineKeyboard`.
+- **Rate Limiting**: Pass a configured utils.RateLimiter via BotOpts to handle Telegram's rate limits gracefully.
+- **Custom HTTP Client**: Provide your own http.Client in BotOpts for fine-tuned control.
+
+## 📝 License
+
+This project is licensed under the GNU General Public License v3.0 — see the [LICENSE](LICENSE) file for details.
+
+## 📚 Learn More
+[GoDoc](https://pkg.go.dev/git.nix13.pw/scuroneko/laniakea)
+
+[Telegram Bot API](https://core.telegram.org/bots/api)
+
+    ✅ Built with ❤️ by scuroneko

README_RU.md

@@ -0,0 +1,207 @@
+# Laniakea
+
+[![Go Version](https://img.shields.io/badge/Go-1.24+-00ADD8?logo=go&style=flat-square)](https://go.dev/)
+[![License: GPL-3.0](https://img.shields.io/badge/License-GPL%203.0-blue.svg?style=flat-square)](LICENSE)
+![Gitea Release](https://img.shields.io/gitea/v/release/ScuroNeko/Laniakea?gitea_url=https%3A%2F%2Fgit.nix13.pw&sort=semver&display_name=release&style=flat-square&color=purple&link=https%3A%2F%2Fgit.nix13.pw%2FScuroNeko%2FLaniakea%2Freleases)
+
+Легковесная, простая в использовании и производительная обёртка для Telegram Bot API на Go. Она упрощает разработку ботов благодаря чистой системе плагинов, поддержке中间件, автоматической генерации команд и встроенному ограничителю скорости запросов.
+
+[English](README.md)
+
+---
+
+## ✨ Возможности
+
+*   **Простой и интуитивный API:** Разработан для лёгкости использования, основан на практических примерах.
+*   **Система плагинов:** Организуйте функциональность бота в независимые, переиспользуемые плагины.
+*   **Обработка команд:** Легко регистрируйте команды и извлекайте аргументы.
+*   **Поддержка промежуточных слоёв (Middleware):** Выполняйте код до или после команд (например, логирование, проверка доступа).
+*   **Автоматическая генерация команд:** Генерируйте справку и списки команд автоматически.
+*   **Встроенный ограничитель запросов (Rate Limiter):** Защитите бота от превышения лимитов Telegram API (с обработкой `retry_after`).
+*   **Контекст данных:** Передавайте свой контекст базы данных или состояния в обработчики.
+*   **Текучий интерфейс (Fluent Interface):** Стройте цепочки методов для чистой конфигурации (например, `bot.ErrorTemplate(...).AddPlugins(...)`).
+
+---
+
+## 📦 Установка
+
+```bash
+go get git.nix13.pw/scuroneko/laniakea
+```
+
+## 🚀 Быстрый старт (с пошаговыми комментариями)
+Вот минимальный пример бота "echo/ping" с подробными комментариями.
+
+```go
+package main
+
+import (
+	"log"
+
+	"git.nix13.pw/scuroneko/laniakea" // Импортируем библиотеку Laniakea
+)
+
+// echo — это функция-обработчик команды.
+// Она получает два параметра:
+//   - ctx: контекст сообщения (содержит информацию о сообщении, отправителе, чате и т.д.)
+//   - db: ваш пользовательский контекст базы данных (здесь мы используем NoDB — заглушку)
+func echo(ctx *laniakea.MsgContext, db *laniakea.NoDB) {
+	// Отвечаем пользователю текстом, который он прислал, без префикса команды.
+	// ctx.Text содержит сообщение пользователя, из которого удалена часть с командой.
+	ctx.Answer(ctx.Text) // Ввод пользователя БЕЗ команды
+}
+
+func main() {
+	// 1. Создаём опции бота. Замените "TOKEN" на реальный токен от @BotFather.
+	opts := &laniakea.BotOpts{Token: "TOKEN"}
+
+	// 2. Инициализируем новый экземпляр бота.
+	//    Используем laniakea.NoDB как тип контекста базы данных (база не нужна для примера).
+	bot := laniakea.NewBot[laniakea.NoDB](opts)
+	// Гарантируем освобождение ресурсов бота при выходе.
+	defer bot.Close()
+
+	// 3. Создаём новый плагин с именем "ping".
+	//    Плагины помогают группировать связанные команды и промежуточные обработчики.
+	p := laniakea.NewPlugin[laniakea.NoDB]("ping")
+
+	// 4. Добавляем команду в плагин.
+	//    p.NewCommand(echo, "echo") создаёт команду, которая вызывает функцию 'echo' по команде "/echo".
+	p.AddCommand(p.NewCommand(echo, "echo"))
+
+	// 5. Добавляем ещё одну команду, используя анонимную функцию (замыкание).
+	//    Эта команда просто отвечает "Pong", когда пользователь отправляет "/ping".
+	p.AddCommand(p.NewCommand(func(ctx *laniakea.MsgContext, db *laniakea.NoDB) {
+		ctx.Answer("Pong")
+	}, "ping"))
+
+	// 6. Настраиваем бота: задаём шаблон ошибки и добавляем плагин.
+	//    ErrorTemplate устанавливает формат для сообщений об ошибках (где %s будет заменён на текст ошибки).
+	//    AddPlugins(p) регистрирует наш плагин "ping" в боте.
+	bot = bot.ErrorTemplate("Ошибка\n\n%s").AddPlugins(p)
+
+	// 7. Автоматически генерируем команды, такие как /start, /help и список всех зарегистрированных команд.
+	//    Это необязательно, но очень полезно для большинства ботов.
+	if err := bot.AutoGenerateCommands(); err != nil {
+		log.Println(err)
+	}
+
+	// 8. Запускаем бота, начиная прослушивание обновлений (long polling).
+	bot.Run()
+}
+```
+
+### Как это работает
+1. `BotOpts`: Содержит конфигурацию, например, токен API.
+2. `NewBot[T]`: Создаёт экземпляр бота. Параметр типа T позволяет передать пользовательский контекст базы данных (например, *sql.DB), который будет доступен во всех обработчиках. Используйте laniakea.NoDB, если он не нужен.
+3. `NewPlugin`: Создаёт логическую группу для команд и Middleware.
+4. `AddCommand`: Регистрирует команду. Первый аргумент — функция-обработчик (func(*MsgContext, T)), второй — имя команды (без слеша).
+5. **Функции-обработчики**: Получают *MsgContext (детали сообщения, методы типа Answer) и ваш контекст базы данных T.
+6. `ErrorTemplate`: Устанавливает шаблон для сообщений об ошибках. Плейсхолдер %s заменяется на текст ошибки.
+7. `AutoGenerateCommands`: Добавляет встроенные команды (/start, /help) и команду, показывающую список всех доступных команд.
+8. `Run()`: Запускает цикл опроса обновлений бота.
+
+## 📖 Основные концепции
+### Плагины (Plugins)
+Плагины — основной способ организации кода. Плагин может содержать несколько команд и Middleware.
+
+```go
+plugin := laniakea.NewPlugin[MyDB]("admin")
+plugin.AddCommand(plugin.NewCommand(banUser, "ban"))
+bot.AddPlugins(plugin)
+```
+
+### Команды (Commands)
+Команда — это функция, которая обрабатывает конкретную команду бота (например, /start).
+
+```go
+func myHandler(ctx *laniakea.MsgContext, db *MyDB) {
+    // Доступ к аргументам команды через ctx.Args ([]string)
+    // Ответ пользователю: ctx.Answer("какой-то текст")
+}
+```
+
+### Контекст сообщения (MsgContext)
+Предоставляет доступ к входящему сообщению и полезные методы для ответа:
+
+- `Answer(text string)`: Отправляет сообщение с parse_mode none.
+- `AnswerMarkdown(text string)`: Отправляет сообщение, отформатированное MarkdownV2 (экранирование на вашей стороне).
+- `Keyboard(text string, keyboard *InlineKeyboard) *AnswerMessage`: Отправляет сообщение с parse_mode none и Inline клавиатурой.
+- `KeyboardMarkdown(text string, keyboard *InlineKeyboard) *AnswerMessage`: Отправляет сообщение, отформатированное MarkdownV2 (экранирование на вашей стороне), и Inline клавиатурой.
+- `AnswerPhoto(photoId, text string) *AnswerMessage`: Отправляет фотографию с подписью и parse_mode none.
+- `AnswerPhotoMarkdown(photoId, text string) *AnswerMessage`: Отправляет фотографию с подписью, отформатированной MarkdownV2 (экранирование на вашей стороне).
+- `EditCallback(text string)`: Редактирует сообщение, форматируя его в MarkdownV2 (экранирование на вашей стороне), после нажатия Inline кнопки.
+- `EditCallbackMarkdown(text string)`: Редактирует сообщение с parse_mode none после нажатия Inline кнопки.
+- `SendChatAction(action string)`: Отправляет действие "печатает", "загружает фото" и т.д.
+- Поля: `Text`, `Args`, `From`, `Chat`, `Msg` и другие.
+- И много других методов и полей!
+
+### Контекст базы данных (Database Context)
+Параметр типа `T` в `NewBot[T]` — мощная функция. Вы можете передать любой тип (например, пул соединений с БД), и он будет доступен в каждом обработчике команды и中间件.
+
+```go
+type MyDB struct { /* ... */ }
+db := &MyDB{...}
+bot := laniakea.NewBot[*MyDB](opts, db) // Передаём экземпляр db
+```
+
+## 🧩 Промежуточные слои (Middleware)
+Middleware — это функции, которые выполняются перед обработчиком команды. Они идеально подходят для сквозных задач, таких как логирование, контроль доступа, ограничение скорости запросов или модификация контекста.
+
+### Сигнатура
+Функция middleware имеет ту же сигнатуру, что и обработчик команды, но должна возвращать bool:
+
+```go
+func(ctx *MsgContext, db T) bool
+```
+
+- Если возвращается true, выполняется следующий middleware (или сама команда).
+- Если возвращается false, цепочка выполнения немедленно прерывается (команда не запускается).
+
+### Добавление middleware
+Используйте метод Use плагина для добавления одной или нескольких функций middleware. Они выполняются в порядке добавления.
+
+```go
+plugin := laniakea.NewPlugin[MyDB]("admin")
+plugin.Use(loggingMiddleware, adminOnlyMiddleware)
+plugin.AddCommand(plugin.NewCommand(banUser, "ban"))
+```
+
+### Примеры middleware
+
+1. Логирующий middleware – логирует каждое выполнение команды.
+```go
+func loggingMiddleware(ctx *laniakea.MsgContext, db *MyDB) bool {
+    log.Printf("Пользователь %d выполнил команду: %s", ctx.FromID, ctx.Msg.Text)
+    return true // продолжаем к следующему middleware/команде
+}
+```
+
+2. Middleware только для администраторов – ограничивает доступ пользователям с определённой ролью.
+```go
+func adminOnlyMiddleware(ctx *laniakea.MsgContext, db *MyDB) bool {
+    if !db.IsAdmin(ctx.FromID) { // предполагается, что db имеет метод IsAdmin
+        ctx.Answer("⛔ Доступ запрещён. Только для администраторов.")
+        return false // останавливаем выполнение
+    }
+    return true
+}
+```
+
+### Важные замечания
+- Middleware может изменять MsgContext (например, добавлять пользовательские поля) перед запуском команды.
+
+## ⚙️ Расширенная настройка
+**Инлайн-клавиатуры**: Создавайте клавиатуры с помощью laniakea.NewKeyboard().
+**Ограничение запросов**: Передайте настроенный utils.RateLimiter через BotOpts для корректной обработки лимитов Telegram.
+**Пользовательский HTTP-клиент**: Предоставьте свой http.Client в BotOpts для точного контроля.
+
+## 📝 Лицензия
+Этот проект лицензирован под GNU General Public License v3.0 - подробности см. в файле [LICENSE](LICENSE).
+
+## 📚 Дополнительная информация
+[GoDoc Laniakea](https://pkg.go.dev/git.nix13.pw/scuroneko/laniakea)
+
+[Telegram Bot API](https://core.telegram.org/bots/api)
+
+    ✅ Создано с ❤️ scuroneko

bot.go

@@ -3,128 +3,152 @@ package laniakea
 import (
 	"context"
 	"fmt"
-	"os"
 	"sort"
-	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"git.nix13.pw/scuroneko/extypes"
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
+	"git.nix13.pw/scuroneko/laniakea/utils"
 	"git.nix13.pw/scuroneko/slog"
 	"github.com/alitto/pond/v2"
-	"golang.org/x/time/rate"
 )
 
-type BotOpts struct {
-	Token       string
-	UpdateTypes []string
+// DbContext is an interface representing the application's database context.
+// It is injected into plugins and middleware via Bot.DatabaseContext().
+//
+// Example:
+//
+//	type MyDB struct { ... }
+//	bot := NewBot[MyDB](opts).DatabaseContext(&myDB)
+//
+// Use NoDB if no database is needed.
+type DbContext any
 
-	Debug         bool
-	ErrorTemplate string
-	Prefixes      []string
-
-	LoggerBasePath   string
-	UseRequestLogger bool
-	WriteToFile      bool
-
-	UseTestServer bool
-	APIUrl        string
-
-	RateLimit      int
-	DropRLOverflow bool
-}
-
-func NewOpts() *BotOpts { return new(BotOpts) }
-func LoadOptsFromEnv() *BotOpts {
-	rateLimit := 30
-	if rl := os.Getenv("RATE_LIMIT"); rl != "" {
-		rateLimit, _ = strconv.Atoi(rl)
-	}
-
-	return &BotOpts{
-		Token:       os.Getenv("TG_TOKEN"),
-		UpdateTypes: strings.Split(os.Getenv("UPDATE_TYPES"), ";"),
-
-		Debug:         os.Getenv("DEBUG") == "true",
-		ErrorTemplate: os.Getenv("ERROR_TEMPLATE"),
-		Prefixes:      LoadPrefixesFromEnv(),
-
-		UseRequestLogger: os.Getenv("USE_REQ_LOG") == "true",
-		WriteToFile:      os.Getenv("WRITE_TO_FILE") == "true",
-
-		UseTestServer: os.Getenv("USE_TEST_SERVER") == "true",
-		APIUrl:        os.Getenv("API_URL"),
-
-		RateLimit:      rateLimit,
-		DropRLOverflow: os.Getenv("DROP_RL_OVERFLOW") == "true",
-	}
-}
-func LoadPrefixesFromEnv() []string {
-	prefixesS, exists := os.LookupEnv("PREFIXES")
-	if !exists {
-		return []string{"/"}
-	}
-	return strings.Split(prefixesS, ";")
-}
-
-type DbContext interface{}
+// NoDB is a placeholder type for bots that do not use a database.
+// Use Bot[NoDB] to indicate no dependency injection is required.
 type NoDB struct{ DbContext }
+
+// DbLogger is a function type that returns a slog.LoggerWriter for database logging.
+// Used to inject database-specific log output (e.g., SQL queries, ORM events).
+type DbLogger[T DbContext] func(db *T) slog.LoggerWriter
+
+// BotPayloadType defines the serialization format for callback data payloads.
+type BotPayloadType string
+
+var (
+	// BotPayloadBase64 encodes callback data as a Base64 string.
+	BotPayloadBase64 BotPayloadType = "base64"
+	// BotPayloadJson encodes callback data as a JSON string.
+	BotPayloadJson BotPayloadType = "json"
+)
+
+// Bot is the core Telegram bot instance.
+//
+// Manages:
+//   - API communication via tgapi
+//   - Update processing pipeline (middleware → plugins)
+//   - Background runners
+//   - Logging and rate limiting
+//   - Localization and draft message support
+//
+// All methods are safe for concurrent use. Direct field access is not recommended.
 type Bot[T DbContext] struct {
 	token         string
 	debug         bool
 	errorTemplate string
+	username      string
+	payloadType   BotPayloadType
+	maxWorkers    int
 
-	logger        *slog.Logger
-	RequestLogger *slog.Logger
-	extraLoggers  extypes.Slice[*slog.Logger]
+	logger        *slog.Logger                // Main bot logger (JSON stdout + optional file)
+	RequestLogger *slog.Logger                // Optional request-level API logging
+	extraLoggers  extypes.Slice[*slog.Logger] // API, Uploader, and custom loggers
 
-	plugins     []Plugin[T]
-	middlewares []Middleware[T]
-	prefixes    []string
-	runners     []Runner[T]
+	plugins     []Plugin[T]     // Command/event handlers
+	middlewares []Middleware[T] // Pre-processing filters (sorted by order)
+	prefixes    []string        // Command prefixes (e.g., "/", "!")
+	runners     []Runner[T]     // Background tasks (e.g., cleanup, cron)
 
-	api           *tgapi.API
-	uploader      *tgapi.Uploader
-	dbContext     *T
-	l10n          *L10n
-	draftProvider *DraftProvider
+	api           *tgapi.API      // Telegram API client
+	uploader      *tgapi.Uploader // File uploader
+	dbContext     *T              // Injected database context
+	l10n          *L10n           // Localization manager
+	draftProvider *DraftProvider  // Draft message builder
 
 	updateOffsetMu sync.Mutex
-	updateOffset   int
-	updateTypes    []tgapi.UpdateType
-	updateQueue    chan *tgapi.Update
+	updateOffset   int                // Last processed update ID
+	updateTypes    []tgapi.UpdateType // Types of updates to fetch
+	updateQueue    chan *tgapi.Update // Internal queue for processing updates
+	runnerOnceWG   sync.WaitGroup     // Tracks one-time async runners
+	runnerBgWG     sync.WaitGroup     // Tracks background async runners
 }
 
+// NewBot creates and initializes a new Bot instance using the provided BotOpts.
+//
+// Automatically:
+//   - Creates API and Uploader clients
+//   - Initializes structured logging (JSON stdout + optional file)
+//   - Fetches bot username via GetMe()
+//   - Sets up DraftProvider with random IDs
+//   - Adds API and Uploader loggers to extraLoggers
+//
+// Panics if:
+//   - Token is empty
+//   - GetMe() fails (invalid token or network error)
 func NewBot[T any](opts *BotOpts) *Bot[T] {
-	updateQueue := make(chan *tgapi.Update, 512)
-
-	var limiter *rate.Limiter
-	if opts.RateLimit > 0 {
-		limiter = rate.NewLimiter(rate.Limit(opts.RateLimit), opts.RateLimit)
+	if opts.Token == "" {
+		panic("laniakea: BotOpts.Token is required")
 	}
 
-	apiOpts := tgapi.NewAPIOpts(opts.Token).SetAPIUrl(opts.APIUrl).UseTestServer(opts.UseTestServer).SetLimiter(limiter)
-	api := tgapi.NewAPI(apiOpts)
+	updateQueue := make(chan *tgapi.Update, 512)
 
+	//var limiter *utils.RateLimiter
+	//if opts.RateLimit > 0 {
+	//	limiter = utils.NewRateLimiter()
+	//}
+	limiter := utils.NewRateLimiter()
+	limiter.SetGlobalRate(opts.RateLimit)
+
+	apiOpts := tgapi.NewAPIOpts(opts.Token).
+		SetAPIUrl(opts.APIUrl).
+		UseTestServer(opts.UseTestServer).
+		SetLimiter(limiter).
+		SetLimiterDrop(opts.DropRLOverflow)
+	api := tgapi.NewAPI(apiOpts)
 	uploader := tgapi.NewUploader(api)
 
+	prefixes := opts.Prefixes
+	if len(prefixes) == 0 {
+		prefixes = []string{"/"}
+	}
+
+	workers := 32
+	if opts.MaxWorkers > 0 {
+		workers = opts.MaxWorkers
+	}
+
 	bot := &Bot[T]{
 		updateOffset:  0,
 		errorTemplate: "%s",
+		payloadType:   BotPayloadBase64,
+		maxWorkers:    workers,
 		updateQueue:   updateQueue,
 		api:           api,
 		uploader:      uploader,
 		debug:         opts.Debug,
-		prefixes:      opts.Prefixes,
+		prefixes:      prefixes,
 		token:         opts.Token,
 		plugins:       make([]Plugin[T], 0),
-		updateTypes:   make([]tgapi.UpdateType, 0),
+		updateTypes:   append([]tgapi.UpdateType{}, opts.UpdateTypes...),
 		runners:       make([]Runner[T], 0),
 		extraLoggers:  make([]*slog.Logger, 0),
 		l10n:          &L10n{},
 		draftProvider: NewRandomDraftProvider(api),
 	}
+
+	// Add API and Uploader loggers to extraLoggers for unified output
 	bot.extraLoggers = bot.extraLoggers.Push(api.GetLogger()).Push(uploader.GetLogger())
 
 	if len(opts.ErrorTemplate) > 0 {
@@ -135,15 +159,30 @@ func NewBot[T any](opts *BotOpts) *Bot[T] {
 	}
 	bot.initLoggers(opts)
 
+	// Fetch bot info to validate token and get username
 	u, err := api.GetMe()
 	if err != nil {
 		_ = bot.Close()
 		bot.logger.Fatal(err)
 	}
-	bot.logger.Infof("Authorized as %s\n", u.FirstName)
+	bot.username = Val(u.Username, "")
+	if bot.username == "" {
+		bot.logger.Warn("Can't get bot username. Named command handlers won't work!")
+	}
+	bot.logger.Infoln(fmt.Sprintf("Authorized as %s (@%s)", u.FirstName, Val(u.Username, "unknown")))
 
 	return bot
 }
+
+// Close gracefully shuts down the bot.
+//
+// Closes:
+//   - Uploader (waits for pending uploads)
+//   - API client
+//   - RequestLogger (if enabled)
+//   - Main logger
+//
+// Returns the first error encountered, if any.
 func (bot *Bot[T]) Close() error {
 	if err := bot.uploader.Close(); err != nil {
 		bot.logger.Errorln(err)
@@ -151,14 +190,22 @@ func (bot *Bot[T]) Close() error {
 	if err := bot.api.CloseApi(); err != nil {
 		bot.logger.Errorln(err)
 	}
-	if err := bot.RequestLogger.Close(); err != nil {
-		bot.logger.Errorln(err)
+	if bot.RequestLogger != nil {
+		if err := bot.RequestLogger.Close(); err != nil {
+			bot.logger.Errorln(err)
+		}
 	}
 	if err := bot.logger.Close(); err != nil {
 		return err
 	}
 	return nil
 }
+
+// initLoggers configures the main and optional request loggers.
+//
+// Uses DEBUG flag to set log level (DEBUG if true, FATAL otherwise).
+// Writes to stdout in JSON format by default.
+// If WriteToFile is true, writes to main.log and requests.log in LoggerBasePath.
 func (bot *Bot[T]) initLoggers(opts *BotOpts) {
 	level := slog.FATAL
 	if opts.Debug {
@@ -190,27 +237,199 @@ func (bot *Bot[T]) initLoggers(opts *BotOpts) {
 	}
 }
 
+// GetUpdateOffset returns the current update offset (thread-safe).
 func (bot *Bot[T]) GetUpdateOffset() int {
 	bot.updateOffsetMu.Lock()
 	defer bot.updateOffsetMu.Unlock()
 	return bot.updateOffset
 }
+
+// SetUpdateOffset sets the update offset for next GetUpdates call (thread-safe).
 func (bot *Bot[T]) SetUpdateOffset(offset int) {
 	bot.updateOffsetMu.Lock()
 	defer bot.updateOffsetMu.Unlock()
 	bot.updateOffset = offset
 }
+
+// GetUpdateTypes returns the list of update types the bot is configured to receive.
 func (bot *Bot[T]) GetUpdateTypes() []tgapi.UpdateType { return bot.updateTypes }
-func (bot *Bot[T]) GetLogger() *slog.Logger            { return bot.logger }
-func (bot *Bot[T]) GetDBContext() *T                   { return bot.dbContext }
-func (bot *Bot[T]) L10n(lang, key string) string       { return bot.l10n.Translate(lang, key) }
+
+// GetLogger returns the main bot logger.
+func (bot *Bot[T]) GetLogger() *slog.Logger { return bot.logger }
+
+// GetDBContext returns the injected database context.
+// Returns nil if not set via DatabaseContext().
+func (bot *Bot[T]) GetDBContext() *T { return bot.dbContext }
+
+// L10n translates a key in the given language.
+// Returns empty string if translation not found.
+func (bot *Bot[T]) L10n(lang, key string) string {
+	return bot.l10n.Translate(lang, key)
+}
+
+// SetDraftProvider replaces the default DraftProvider with a custom one.
+// Useful for using LinearDraftIdGenerator to persist draft IDs across restarts.
 func (bot *Bot[T]) SetDraftProvider(p *DraftProvider) *Bot[T] {
 	bot.draftProvider = p
 	return bot
 }
 
-type DbLogger[T DbContext] func(db *T) slog.LoggerWriter
+// DatabaseContext injects a database context into the bot.
+// This context is accessible to plugins and middleware via GetDBContext().
+func (bot *Bot[T]) DatabaseContext(ctx *T) *Bot[T] {
+	bot.dbContext = ctx
+	return bot
+}
 
+// UpdateTypes sets the list of update types the bot will request from Telegram.
+// Overwrites any previously set types.
+func (bot *Bot[T]) UpdateTypes(t ...tgapi.UpdateType) *Bot[T] {
+	bot.updateTypes = make([]tgapi.UpdateType, 0)
+	bot.updateTypes = append(bot.updateTypes, t...)
+	return bot
+}
+
+// SetPayloadType sets the payload encoding type used for callback data.
+// JSON stores payload as a string: `{"cmd":"command","args":[...]}`.
+// Base64 stores the same JSON encoded as a Base64URL string.
+func (bot *Bot[T]) SetPayloadType(t BotPayloadType) *Bot[T] {
+	bot.payloadType = t
+	return bot
+}
+
+// AddUpdateType adds one or more update types to the list.
+// Does not overwrite existing types.
+func (bot *Bot[T]) AddUpdateType(t ...tgapi.UpdateType) *Bot[T] {
+	bot.updateTypes = append(bot.updateTypes, t...)
+	return bot
+}
+
+// AddPrefixes adds one or more command prefixes (e.g., "/", "!").
+// Must have at least one prefix before Run().
+func (bot *Bot[T]) AddPrefixes(prefixes ...string) *Bot[T] {
+	bot.prefixes = append(bot.prefixes, prefixes...)
+	return bot
+}
+
+// ErrorTemplate sets the format string for error messages sent to users.
+// Use "%s" to insert the error message.
+// Example: "❌ Error: %s" → "❌ Error: Command not found".
+func (bot *Bot[T]) ErrorTemplate(s string) *Bot[T] {
+	bot.errorTemplate = s
+	return bot
+}
+
+// Debug enables or disables debug logging.
+func (bot *Bot[T]) Debug(debug bool) *Bot[T] {
+	bot.debug = debug
+	return bot
+}
+
+// AddPlugins registers one or more plugins.
+// Plugins are executed in registration order unless filtered by middleware.
+func (bot *Bot[T]) AddPlugins(plugin ...*Plugin[T]) *Bot[T] {
+	for _, p := range plugin {
+		bot.plugins = append(bot.plugins, *p)
+		bot.logger.Debugln(fmt.Sprintf("plugins with name \"%s\" registered", p.name))
+	}
+	return bot
+}
+
+// AddMiddleware registers one or more middleware handlers.
+//
+// Middleware are executed in order of increasing .order value before plugins.
+// If two middleware have the same order, they are sorted lexicographically by name.
+//
+// Middleware can:
+//   - Modify or reject updates before they reach plugins
+//   - Inject context (e.g., user auth state, rate limit status)
+//   - Log, validate, or transform incoming data
+//
+// Example:
+//
+//	bot.AddMiddleware(&authMiddleware, &rateLimitMiddleware)
+//
+// Panics if any middleware has a nil name.
+func (bot *Bot[T]) AddMiddleware(middleware ...Middleware[T]) *Bot[T] {
+	for _, m := range middleware {
+		if m.name == "" {
+			panic("laniakea: middleware must have a non-empty name")
+		}
+		bot.middlewares = append(bot.middlewares, m)
+		bot.logger.Debugln(fmt.Sprintf("middleware with name \"%s\" registered", m.name))
+	}
+
+	// Stable sort by order (ascending), then by name (lexicographic)
+	sort.Slice(bot.middlewares, func(i, j int) bool {
+		first := bot.middlewares[i]
+		second := bot.middlewares[j]
+		if first.order != second.order {
+			return first.order < second.order
+		}
+		return first.name < second.name
+	})
+
+	return bot
+}
+
+// AddRunner registers a background runner to execute concurrently with the bot.
+//
+// Runners are goroutines that run independently of update processing.
+// Common use cases:
+//   - Periodic cleanup (e.g., expiring drafts, clearing temp files)
+//   - Metrics collection or health checks
+//   - Scheduled tasks (e.g., daily announcements)
+//
+// Runners are started immediately after Bot.Run() is called.
+//
+// Example:
+//
+//	bot.AddRunner(&cleanupRunner)
+//
+// Panics if runner has a nil name.
+func (bot *Bot[T]) AddRunner(runner Runner[T]) *Bot[T] {
+	if runner.name == "" {
+		panic("laniakea: runner must have a non-empty name")
+	}
+	bot.runners = append(bot.runners, runner)
+	bot.logger.Debugln(fmt.Sprintf("runner with name \"%s\" registered", runner.name))
+	return bot
+}
+
+// AddL10n sets the localization (i18n) provider for the bot.
+//
+// The L10n instance must be pre-populated with translations.
+// Translations are accessed via Bot.L10n(lang, key).
+//
+// Example:
+//
+//	l10n := l10n.New()
+//	l10n.Add("en", "hello", "Hello!")
+//	l10n.Add("es", "hello", "¡Hola!")
+//	bot.AddL10n(l10n)
+//
+// Replaces any previously set L10n instance.
+func (bot *Bot[T]) AddL10n(l *L10n) *Bot[T] {
+	if l == nil {
+		bot.logger.Warn("AddL10n called with nil L10n; localization will be disabled")
+		return bot
+	}
+	bot.l10n = l
+	return bot
+}
+
+// AddDatabaseLoggerWriter adds a database logger writer to all loggers.
+//
+// The writer will receive logs from:
+//   - Main bot logger
+//   - Request logger (if enabled)
+//   - API and Uploader loggers
+//
+// Example:
+//
+//	bot.AddDatabaseLoggerWriter(func(db *MyDB) slog.LoggerWriter {
+//	    return db.QueryLogger()
+//	})
 func (bot *Bot[T]) AddDatabaseLoggerWriter(writer DbLogger[T]) *Bot[T] {
 	w := writer(bot.dbContext)
 	bot.logger.AddWriter(w)
@@ -223,74 +442,32 @@ func (bot *Bot[T]) AddDatabaseLoggerWriter(writer DbLogger[T]) *Bot[T] {
 	return bot
 }
 
-func (bot *Bot[T]) DatabaseContext(ctx *T) *Bot[T] {
-	bot.dbContext = ctx
-	return bot
-}
-func (bot *Bot[T]) UpdateTypes(t ...tgapi.UpdateType) *Bot[T] {
-	bot.updateTypes = make([]tgapi.UpdateType, 0)
-	bot.updateTypes = append(bot.updateTypes, t...)
-	return bot
-}
-func (bot *Bot[T]) AddUpdateType(t ...tgapi.UpdateType) *Bot[T] {
-	bot.updateTypes = append(bot.updateTypes, t...)
-	return bot
-}
-func (bot *Bot[T]) AddPrefixes(prefixes ...string) *Bot[T] {
-	bot.prefixes = append(bot.prefixes, prefixes...)
-	return bot
-}
-func (bot *Bot[T]) ErrorTemplate(s string) *Bot[T] {
-	bot.errorTemplate = s
-	return bot
-}
-func (bot *Bot[T]) Debug(debug bool) *Bot[T] {
-	bot.debug = debug
-	return bot
-}
-func (bot *Bot[T]) AddPlugins(plugin ...*Plugin[T]) *Bot[T] {
-	for _, p := range plugin {
-		bot.plugins = append(bot.plugins, *p)
-		bot.logger.Debugln(fmt.Sprintf("plugins with name \"%s\" registered", p.name))
-	}
-	return bot
-}
-func (bot *Bot[T]) AddMiddleware(middleware ...Middleware[T]) *Bot[T] {
-	bot.middlewares = append(bot.middlewares, middleware...)
-	for _, m := range middleware {
-		bot.logger.Debugln(fmt.Sprintf("middleware with name \"%s\" registered", m.name))
-	}
-
-	sort.Slice(bot.middlewares, func(i, j int) bool {
-		first := bot.middlewares[i]
-		second := bot.middlewares[j]
-		if first.order == second.order {
-			return first.name < second.name
-		}
-		return first.order < second.order
-	})
-
-	return bot
-}
-func (bot *Bot[T]) AddRunner(runner Runner[T]) *Bot[T] {
-	bot.runners = append(bot.runners, runner)
-	bot.logger.Debugln(fmt.Sprintf("runner with name \"%s\" registered", runner.name))
-	return bot
-}
-func (bot *Bot[T]) AddL10n(l *L10n) *Bot[T] {
-	bot.l10n = l
-	return bot
-}
-
-func (bot *Bot[T]) enqueueUpdate(u *tgapi.Update) error {
-	select {
-	case bot.updateQueue <- u:
-		return nil
-	default:
-		return extypes.QueueFullErr
-	}
-}
+// RunWithContext starts the bot with a given context for graceful shutdown.
+//
+// This is the main entry point for bot execution. It:
+//   - Validates required configuration (prefixes, plugins)
+//   - Starts all registered runners as background goroutines
+//   - Begins polling for updates via Telegram's GetUpdates API
+//   - Processes updates concurrently using a worker pool with size configurable via BotOpts.MaxWorkers
+//
+// The context controls graceful shutdown. When canceled, the bot:
+//   - Stops polling for new updates
+//   - Finishes processing currently queued updates
+//   - Closes all resources (API, uploader, loggers)
+//
+// Example:
+//
+//	ctx, cancel := context.WithCancel(context.Background())
+//	go bot.RunWithContext(ctx)
+//	// ... later ...
+//	cancel() // triggers graceful shutdown
 func (bot *Bot[T]) RunWithContext(ctx context.Context) {
+	defer func() {
+		if err := bot.Close(); err != nil {
+			bot.logger.Errorln(err)
+		}
+	}()
+
 	if len(bot.prefixes) == 0 {
 		bot.logger.Fatalln("no prefixes defined")
 		return
@@ -301,10 +478,18 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) {
 		return
 	}
 
-	bot.ExecRunners()
+	bot.ExecRunners(ctx)
 
 	bot.logger.Infoln("Bot running. Press CTRL+C to exit.")
+
+	// Start update polling in a goroutine
 	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				bot.logger.Errorln(fmt.Sprintf("panic in update polling: %v", r))
+			}
+			close(bot.updateQueue)
+		}()
 		for {
 			select {
 			case <-ctx.Done():
@@ -312,13 +497,15 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) {
 			default:
 				updates, err := bot.Updates()
 				if err != nil {
-					bot.logger.Errorln(err)
+					bot.logger.Errorln("failed to fetch updates:", err)
+					time.Sleep(2 * time.Second) // exponential backoff
 					continue
 				}
 
 				for _, u := range updates {
+					u := u // copy loop variable to avoid race condition
 					select {
-					case bot.updateQueue <- new(u):
+					case bot.updateQueue <- &u:
 					case <-ctx.Done():
 						return
 					}
@@ -327,14 +514,25 @@ func (bot *Bot[T]) RunWithContext(ctx context.Context) {
 		}
 	}()
 
-	pool := pond.NewPool(16)
+	// Start worker pool for concurrent update handling
+	pool := pond.NewPool(bot.maxWorkers)
 	for update := range bot.updateQueue {
-		update := update
+		u := update // capture loop variable
 		pool.Submit(func() {
-			bot.handle(update)
+			bot.handle(u)
 		})
 	}
+	pool.Stop() // Wait for all tasks to complete and stop the pool
+	bot.runnerOnceWG.Wait()
+	bot.runnerBgWG.Wait()
 }
+
+// Run starts the bot using a background context.
+//
+// Equivalent to RunWithContext(context.Background()).
+// Use this for simple bots where graceful shutdown is not required.
+//
+// For production use, prefer RunWithContext to handle SIGINT/SIGTERM gracefully.
 func (bot *Bot[T]) Run() {
 	bot.RunWithContext(context.Background())
 }

bot_opts.go

@@ -0,0 +1,226 @@
+package laniakea
+
+import (
+	"os"
+	"strconv"
+	"strings"
+
+	"git.nix13.pw/scuroneko/laniakea/tgapi"
+)
+
+// BotOpts holds configuration options for initializing a Bot.
+//
+// Values are loaded from environment variables via LoadOptsFromEnv().
+// Use NewOpts() to create a zero-value struct and set fields manually.
+type BotOpts struct {
+	// Token is the Telegram bot token (required).
+	Token string
+
+	// UpdateTypes is a list of update types to listen for.
+	// Example: "["message", "edited_message", "callback_query"]"
+	// Defaults to empty (Telegram will return all types).
+	UpdateTypes []tgapi.UpdateType
+
+	// Debug enables debug-level logging.
+	Debug bool
+
+	// ErrorTemplate is the format string used to wrap error messages sent to users.
+	// Use "%s" to insert the actual error. Example: "❌ Error: %s"
+	ErrorTemplate string
+
+	// Prefixes is a list of command prefixes (e.g., ["/", "!"]).
+	// Defaults to ["/"] if not set via environment.
+	Prefixes []string
+
+	// LoggerBasePath is the directory where log files are written.
+	// Defaults to "./".
+	LoggerBasePath string
+
+	// UseRequestLogger enables detailed logging of all Telegram API requests.
+	UseRequestLogger bool
+
+	// WriteToFile enables writing logs to files (main.log and requests.log).
+	WriteToFile bool
+
+	// UseTestServer uses Telegram's test server (https://api.test.telegram.org).
+	UseTestServer bool
+
+	// APIUrl overrides the default Telegram API endpoint (useful for proxies or self-hosted).
+	APIUrl string
+
+	// RateLimit is the maximum number of API requests per second.
+	// Telegram allows up to 30 req/s for most bots. Defaults to 30.
+	RateLimit int
+
+	// DropRLOverflow drops incoming updates when rate limit is exceeded instead of queuing.
+	// Use this to prioritize responsiveness over reliability.
+	DropRLOverflow bool
+
+	// MaxWorkers is the maximum number of concurrency running update handlers.
+	MaxWorkers int
+}
+
+// LoadOptsFromEnv loads BotOpts from environment variables.
+//
+// Environment variables:
+//   - TG_TOKEN: Bot token (required)
+//   - UPDATE_TYPES: semicolon-separated update types (e.g., "message;callback_query")
+//   - DEBUG: "true" to enable debug logging
+//   - ERROR_TEMPLATE: format string for error messages (e.g., "❌ %s")
+//   - PREFIXES: semicolon-separated prefixes (e.g., "/;!bot")
+//   - LOGGER_BASE_PATH: directory for log files (default: "./")
+//   - USE_REQ_LOG: "true" to enable request logging
+//   - WRITE_TO_FILE: "true" to write logs to files
+//   - USE_TEST_SERVER: "true" to use Telegram test server
+//   - API_URL: custom API endpoint
+//   - RATE_LIMIT: max requests per second (default: 30)
+//   - DROP_RL_OVERFLOW: "true" to drop updates on rate limit overflow
+//
+// Returns a populated BotOpts. If TG_TOKEN is missing, behavior is undefined.
+func LoadOptsFromEnv() *BotOpts {
+	rateLimit := 30
+	if rl := os.Getenv("RATE_LIMIT"); rl != "" {
+		if n, err := strconv.Atoi(rl); err == nil {
+			rateLimit = n
+		}
+	}
+
+	stringUpdateTypes := strings.Split(os.Getenv("UPDATE_TYPES"), ";")
+	updateTypes := make([]tgapi.UpdateType, len(stringUpdateTypes))
+	for i, updateType := range stringUpdateTypes {
+		updateTypes[i] = tgapi.UpdateType(updateType)
+	}
+
+	return &BotOpts{
+		Token:       os.Getenv("TG_TOKEN"),
+		UpdateTypes: updateTypes,
+
+		Debug:         os.Getenv("DEBUG") == "true",
+		ErrorTemplate: os.Getenv("ERROR_TEMPLATE"),
+		Prefixes:      LoadPrefixesFromEnv(),
+
+		LoggerBasePath:   os.Getenv("LOGGER_BASE_PATH"),
+		UseRequestLogger: os.Getenv("USE_REQ_LOG") == "true",
+		WriteToFile:      os.Getenv("WRITE_TO_FILE") == "true",
+
+		UseTestServer: os.Getenv("USE_TEST_SERVER") == "true",
+		APIUrl:        os.Getenv("API_URL"),
+
+		RateLimit:      rateLimit,
+		DropRLOverflow: os.Getenv("DROP_RL_OVERFLOW") == "true",
+	}
+}
+
+// SetToken sets the Telegram bot token (required).
+func (opts *BotOpts) SetToken(token string) *BotOpts {
+	opts.Token = token
+	return opts
+}
+
+// SetUpdateTypes sets the list of update types to listen for.
+// If empty (default), Telegram will return all update types.
+// Example: opts.SetUpdateTypes("message", "callback_query").
+func (opts *BotOpts) SetUpdateTypes(types ...tgapi.UpdateType) *BotOpts {
+	opts.UpdateTypes = types
+	return opts
+}
+
+// SetDebug enables or disables debug-level logging.
+// Default is false.
+func (opts *BotOpts) SetDebug(debug bool) *BotOpts {
+	opts.Debug = debug
+	return opts
+}
+
+// SetErrorTemplate sets the format string for error messages sent to users.
+// Use "%s" to insert the actual error. Example: "❌ Error: %s"
+// If not set, defaults to "%s".
+func (opts *BotOpts) SetErrorTemplate(tpl string) *BotOpts {
+	opts.ErrorTemplate = tpl
+	return opts
+}
+
+// SetPrefixes sets the command prefixes (e.g., "/", "!").
+// If not set via environment, defaults to ["/"].
+func (opts *BotOpts) SetPrefixes(prefixes ...string) *BotOpts {
+	opts.Prefixes = prefixes
+	return opts
+}
+
+// SetLoggerBasePath sets the directory where log files are written.
+// Defaults to "./".
+func (opts *BotOpts) SetLoggerBasePath(path string) *BotOpts {
+	opts.LoggerBasePath = path
+	return opts
+}
+
+// SetUseRequestLogger enables detailed logging of all Telegram API requests.
+// Default is false.
+func (opts *BotOpts) SetUseRequestLogger(use bool) *BotOpts {
+	opts.UseRequestLogger = use
+	return opts
+}
+
+// SetWriteToFile enables writing logs to files (main.log and requests.log).
+// Default is false.
+func (opts *BotOpts) SetWriteToFile(write bool) *BotOpts {
+	opts.WriteToFile = write
+	return opts
+}
+
+// SetUseTestServer enables using Telegram's test server (https://api.telegram.org/bot<token>/test).
+// Default is false.
+func (opts *BotOpts) SetUseTestServer(use bool) *BotOpts {
+	opts.UseTestServer = use
+	return opts
+}
+
+// SetAPIUrl overrides the default Telegram API endpoint (useful for proxies or self-hosted).
+// If not set, defaults to "https://api.telegram.org".
+func (opts *BotOpts) SetAPIUrl(url string) *BotOpts {
+	opts.APIUrl = url
+	return opts
+}
+
+// SetRateLimit sets the maximum number of API requests per second.
+// Telegram allows up to 30 req/s for most bots. Defaults to 30.
+func (opts *BotOpts) SetRateLimit(limit int) *BotOpts {
+	opts.RateLimit = limit
+	return opts
+}
+
+// SetDropRLOverflow drops incoming updates when rate limit is exceeded instead of queuing.
+// Use this to prioritize responsiveness over reliability. Default is false.
+func (opts *BotOpts) SetDropRLOverflow(drop bool) *BotOpts {
+	opts.DropRLOverflow = drop
+	return opts
+}
+
+// SetMaxWorkers sets the maximum number of concurrent update handlers.
+// Must be called before NewBot, as the value is captured during bot creation.
+//
+// The optimal value depends on your bot's workload:
+//   - For I/O-bound handlers (e.g., database queries, external API calls), you may
+//     need more workers, but be mindful of downstream service limits.
+//   - For CPU-bound handlers, keep workers close to the number of CPU cores.
+//
+// Recommended starting points (adjust based on profiling and monitoring):
+//   - Small to medium bots with fast handlers: 16–32
+//   - Medium to large bots with fast handlers: 32–64
+//   - Large bots with heavy I/O: 64–128 (ensure your infrastructure can handle it)
+//
+// The default is 32. Monitor queue length and processing latency to fine-tune.
+func (opts *BotOpts) SetMaxWorkers(workers int) *BotOpts {
+	opts.MaxWorkers = workers
+	return opts
+}
+
+// LoadPrefixesFromEnv returns the PREFIXES environment variable split by semicolon.
+// Defaults to ["/"] if not set.
+func LoadPrefixesFromEnv() []string {
+	prefixesS, exists := os.LookupEnv("PREFIXES")
+	if !exists {
+		return []string{"/"}
+	}
+	return strings.Split(prefixesS, ";")
+}

cmd_generator.go

@@ -3,70 +3,166 @@ package laniakea
 import (
 	"errors"
 	"fmt"
+	"regexp"
 	"strings"
 
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
 )
 
-func generateBotCommand[T any](cmd Command[T]) tgapi.BotCommand {
-	desc := cmd.command
+// CmdRegexp matches command names allowed for Telegram command registration.
+var CmdRegexp = regexp.MustCompile("^[a-zA-Z0-9]+$")
+
+// ErrTooManyCommands is returned when the total number of registered commands
+// exceeds Telegram's limit of 100 bot commands per bot.
+//
+// Telegram Bot API enforces this limit strictly. If exceeded, SetMyCommands
+// will fail with a 400 error. This error helps catch the issue early during
+// bot initialization.
+var ErrTooManyCommands = errors.New("too many commands. max 100")
+
+// generateBotCommand builds a BotCommand description with generated usage text.
+func generateBotCommand[T any](cmd *Command[T]) tgapi.BotCommand {
+	desc := ""
 	if len(cmd.description) > 0 {
 		desc = cmd.description
 	}
+
 	var descArgs []string
 	for _, a := range cmd.args {
 		if a.required {
-			descArgs = append(descArgs, fmt.Sprintf("%s", a.text))
+			descArgs = append(descArgs, fmt.Sprintf("<%s>", a.text))
 		} else {
 			descArgs = append(descArgs, fmt.Sprintf("[%s]", a.text))
 		}
 	}
-	desc = fmt.Sprintf("%s. Usage: /%s %s", desc, cmd.command, strings.Join(descArgs, " "))
-	return tgapi.BotCommand{Command: cmd.command, Description: desc}
+
+	usage := fmt.Sprintf("Usage: /%s %s", cmd.command, strings.Join(descArgs, " "))
+	if desc != "" {
+		desc = fmt.Sprintf("%s. %s", desc, usage)
+		return tgapi.BotCommand{Command: cmd.command, Description: desc}
+	}
+	return tgapi.BotCommand{Command: cmd.command, Description: usage}
 }
 
-func generateBotCommandForPlugin[T any](pl Plugin[T]) []tgapi.BotCommand {
+// checkCmdRegex reports whether cmd matches CmdRegexp.
+func checkCmdRegex(cmd string) bool { return CmdRegexp.MatchString(cmd) }
+
+// gatherCommandsForPlugin collects non-skipped, valid commands from one plugin.
+func gatherCommandsForPlugin[T any](pl Plugin[T]) []tgapi.BotCommand {
 	commands := make([]tgapi.BotCommand, 0)
 	for _, cmd := range pl.commands {
 		if cmd.skipAutoCmd {
 			continue
 		}
+		if !checkCmdRegex(cmd.command) {
+			continue
+		}
 		commands = append(commands, generateBotCommand(cmd))
 	}
 	return commands
 }
 
-var ErrTooManyCommands = errors.New("too many commands. max 100")
-
-func (bot *Bot[T]) AutoGenerateCommands() error {
-	_, err := bot.api.DeleteMyCommands(tgapi.DeleteMyCommandsP{})
-	if err != nil {
-		return err
-	}
-
+// gatherCommands collects all commands from all plugins
+// and converts them into tgapi.BotCommand objects.
+// See gatherCommandsForPlugin.
+func gatherCommands[T any](bot *Bot[T]) []tgapi.BotCommand {
 	commands := make([]tgapi.BotCommand, 0)
 	for _, pl := range bot.plugins {
 		if pl.skipAutoCmd {
 			continue
 		}
-
-		commands = append(commands, generateBotCommandForPlugin(pl)...)
+		commands = append(commands, gatherCommandsForPlugin(pl)...)
+		bot.logger.Debugln(fmt.Sprintf("Registered %d commands from plugin %s", len(pl.commands), pl.name))
 	}
+	return commands
+}
+
+// AutoGenerateCommands registers all plugin-defined commands with Telegram's Bot API
+// across three scopes:
+//   - Private chats (users)
+//   - Group chats
+//   - Group administrators
+//
+// It first deletes existing commands to ensure a clean state, then sets the new
+// set of commands for all scopes. This ensures consistency even if commands were
+// previously modified manually via @BotFather.
+//
+// Returns ErrTooManyCommands if the total number of commands exceeds 100.
+// Returns any API error from Telegram (e.g., network issues, invalid scope).
+//
+// Important: This method assumes the bot has been properly initialized and
+// the API client is authenticated and ready.
+//
+// Usage:
+//
+//	err := bot.AutoGenerateCommands()
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+func (bot *Bot[T]) AutoGenerateCommands() error {
+	// Clear existing commands to avoid duplication or stale entries
+	_, err := bot.api.DeleteMyCommands(tgapi.DeleteMyCommandsP{})
+	if err != nil {
+		return fmt.Errorf("failed to delete existing commands: %w", err)
+	}
+
+	commands := gatherCommands(bot)
 	if len(commands) > 100 {
 		return ErrTooManyCommands
 	}
 
-	privateChatsScope := &tgapi.BotCommandScope{Type: tgapi.BotCommandScopePrivateType}
-	groupChatsScope := &tgapi.BotCommandScope{Type: tgapi.BotCommandScopeGroupType}
-	chatAdminsScope := &tgapi.BotCommandScope{Type: tgapi.BotCommandScopeAllChatAdministratorsType}
-	_, err = bot.api.SetMyCommands(tgapi.SetMyCommandsP{Commands: commands, Scope: privateChatsScope})
-	if err != nil {
-		return err
+	// Register commands for each scope
+	scopes := []*tgapi.BotCommandScope{
+		{Type: tgapi.BotCommandScopePrivateType},
+		{Type: tgapi.BotCommandScopeGroupType},
+		{Type: tgapi.BotCommandScopeAllChatAdministratorsType},
 	}
-	_, err = bot.api.SetMyCommands(tgapi.SetMyCommandsP{Commands: commands, Scope: groupChatsScope})
-	if err != nil {
-		return err
+
+	for _, scope := range scopes {
+		_, err = bot.api.SetMyCommands(tgapi.SetMyCommandsP{
+			Commands: commands,
+			Scope:    scope,
+		})
+		if err != nil {
+			return fmt.Errorf("failed to set commands for scope %q: %w", scope.Type, err)
+		}
 	}
-	_, err = bot.api.SetMyCommands(tgapi.SetMyCommandsP{Commands: commands, Scope: chatAdminsScope})
-	return err
+
+	return nil
+}
+
+// AutoGenerateCommandsForScope registers all plugin-defined commands with Telegram's Bot API
+// for the specified command scope. It first deletes any existing commands in that scope
+// to ensure a clean state, then sets the new set of commands.
+//
+// The scope parameter defines where the commands should be available (e.g., private chats,
+// group chats, chat administrators). See tgapi.BotCommandScope and its predefined types.
+//
+// Returns ErrTooManyCommands if the total number of commands exceeds 100.
+// Returns any API error from Telegram (e.g., network issues, invalid scope).
+//
+// Usage:
+//
+//	privateScope := &tgapi.BotCommandScope{Type: tgapi.BotCommandScopePrivateType}
+//	if err := bot.AutoGenerateCommandsForScope(privateScope); err != nil {
+//	    log.Fatal(err)
+//	}
+func (bot *Bot[T]) AutoGenerateCommandsForScope(scope *tgapi.BotCommandScope) error {
+	_, err := bot.api.DeleteMyCommands(tgapi.DeleteMyCommandsP{Scope: scope})
+	if err != nil {
+		return fmt.Errorf("failed to delete existing commands: %w", err)
+	}
+	commands := gatherCommands(bot)
+	if len(commands) > 100 {
+		return ErrTooManyCommands
+	}
+
+	_, err = bot.api.SetMyCommands(tgapi.SetMyCommandsP{
+		Commands: commands,
+		Scope:    scope,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to set commands for scope %q: %w", scope.Type, err)
+	}
+	return nil
 }

doc.go

@@ -0,0 +1,55 @@
+/*
+Package laniakea provides a modular, extensible framework for building scalable Telegram bots.
+
+It offers a fluent API for configuration and separates concerns through several core concepts:
+
+  - Bot: The central instance managing API communication, update processing, logging,
+    rate limiting, and dependency injection. Created via NewBot[T].
+
+  - Plugins: Organize commands and payloads into reusable units.
+    A plugin can have multiple commands and shared middlewares.
+
+  - Commands: Named bot commands with descriptions, argument validation, and
+    execution logic. Automatically registrable across different chat scopes.
+
+  - Middleware: Functions that intercept and modify updates before they reach plugins.
+    Useful for authentication, logging, validation, etc. Return false to stop processing.
+
+  - MsgContext: Provides access to the incoming update and convenient methods for
+    responding, editing, deleting, and translating messages. Includes built-in rate limiting
+    and error handling. ⚠️ MarkdownV2 methods require manual escaping via EscapeMarkdownV2().
+
+  - InlineKeyboard: A fluent builder for constructing inline keyboards with styled buttons,
+    icons, URLs, and structured callback data (JSON or Base64).
+
+  - DraftProvider: Manages ephemeral, multi-step message drafts with automatic ID generation
+    (random or linear). Drafts can be built incrementally and flushed atomically.
+
+  - L10n: Simple key-based localization system with fallback language support.
+
+  - Runners: Background goroutines for periodic tasks or one‑off initialization,
+    with configurable timeouts and async execution.
+
+  - RateLimiting & Logging: Built‑in rate limiter (respects Telegram's retry_after)
+    and structured logging (JSON stdout + optional file output) with request‑level tracing.
+
+  - Dependency Injection: Pass any custom database context (e.g., *sql.DB) to all handlers
+    via the type parameter T in Bot[T].
+
+Example usage:
+
+	bot := laniakea.NewBot[mydb.DBContext](laniakea.LoadOptsFromEnv()).
+	    DatabaseContext(&myDB).
+	    AddUpdateType(tgapi.UpdateTypeMessage).
+	    AddPrefixes("/", "!").
+	    AddPlugins(&startPlugin, &helpPlugin).
+	    AddMiddleware(&authMiddleware, &logMiddleware).
+	    AddRunner(&cleanupRunner).
+	    AddL10n(l10n.New())
+
+	bot.Run()
+
+All public methods are safe for concurrent use unless stated otherwise.
+Direct field access is not recommended; use provided accessors (e.g., GetDBContext, SetUpdateOffset).
+*/
+package laniakea

drafts.go

@@ -1,49 +1,128 @@
 package laniakea
 
 import (
-	"math"
+	"errors"
 	"math/rand/v2"
+	"sync"
 	"sync/atomic"
 
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
 )
 
+// ErrDraftChatIDZero is returned when a draft is used without setting a chat ID.
+var ErrDraftChatIDZero = errors.New("zero draft chat ID")
+
+// draftIdGenerator defines an interface for generating unique draft IDs.
 type draftIdGenerator interface {
+	// Next returns the next unique draft ID.
 	Next() uint64
 }
 
-type RandomDraftIdGenerator struct {
-	draftIdGenerator
-}
+// RandomDraftIdGenerator generates draft IDs using cryptographically secure random numbers.
+// Suitable for distributed systems or when ID predictability is undesirable.
+type RandomDraftIdGenerator struct{}
 
+// Next returns a random 64-bit unsigned integer.
 func (g *RandomDraftIdGenerator) Next() uint64 {
-	return rand.Uint64N(math.MaxUint64)
+	return rand.Uint64()
 }
 
+// LinearDraftIdGenerator generates draft IDs using a monotonically increasing counter.
+// Useful for debugging, persistence, or when drafts must be ordered.
 type LinearDraftIdGenerator struct {
-	draftIdGenerator
-	lastId uint64
+	lastId atomic.Uint64
 }
 
+// Next returns the next linear ID, atomically incremented.
 func (g *LinearDraftIdGenerator) Next() uint64 {
-	return atomic.AddUint64(&g.lastId, 1)
+	return g.lastId.Add(1)
 }
 
+// DraftProvider manages a collection of Drafts and provides methods to create and
+// configure them. It holds shared configuration (chat, parse mode, entities) and
+// a draft ID generator.
+//
+// DraftProvider is NOT thread-safe. Concurrent access from multiple goroutines
+// requires external synchronization.
 type DraftProvider struct {
-	api *tgapi.API
-
-	chatID          int
-	messageThreadID int
-	parseMode       tgapi.ParseMode
-	entities        []tgapi.MessageEntity
-
+	mu        sync.RWMutex
+	api       *tgapi.API
 	drafts    map[uint64]*Draft
 	generator draftIdGenerator
 }
-type Draft struct {
-	api *tgapi.API
 
-	chatID          int
+// NewRandomDraftProvider creates a new DraftProvider using random draft IDs.
+//
+// The provider will use cryptographically secure random numbers for draft IDs.
+// All drafts created via this provider will have unpredictable, unique IDs.
+func NewRandomDraftProvider(api *tgapi.API) *DraftProvider {
+	return &DraftProvider{
+		api: api, generator: &RandomDraftIdGenerator{},
+		drafts: make(map[uint64]*Draft),
+	}
+}
+
+// NewLinearDraftProvider creates a new DraftProvider using linear (incrementing) draft IDs.
+//
+// startValue is the initial value for the counter. Use 0 for fresh start, or a known
+// value to resume from persisted state.
+//
+// This is useful when you need to store draft IDs externally (e.g., in a database)
+// and want to reconstruct drafts after restart.
+func NewLinearDraftProvider(api *tgapi.API, startValue uint64) *DraftProvider {
+	g := &LinearDraftIdGenerator{}
+	g.lastId.Store(startValue)
+	return &DraftProvider{
+		api:       api,
+		generator: g,
+		drafts:    make(map[uint64]*Draft),
+	}
+}
+
+// GetDraft retrieves a draft by its ID.
+//
+// Returns the draft and true if found, or nil and false if not found.
+func (p *DraftProvider) GetDraft(id uint64) (*Draft, bool) {
+	p.mu.RLock()
+	defer p.mu.RUnlock()
+	draft, ok := p.drafts[id]
+	return draft, ok
+}
+
+// FlushAll sends all pending drafts as final messages and clears them.
+//
+// If one or more drafts fail to send, FlushAll still attempts all drafts and
+// returns the first encountered error.
+//
+// After successful flush, each draft is removed from the provider and cleared.
+func (p *DraftProvider) FlushAll() error {
+	p.mu.RLock()
+	drafts := make([]*Draft, 0, len(p.drafts))
+	for _, draft := range p.drafts {
+		drafts = append(drafts, draft)
+	}
+	p.mu.RUnlock()
+
+	var firstErr error
+	for _, draft := range drafts {
+		if err := draft.Flush(); err != nil && firstErr == nil {
+			firstErr = err
+		}
+	}
+	return firstErr
+}
+
+// Draft represents a single message draft that can be edited and flushed.
+//
+// Drafts are safe to use from a single goroutine. Multiple goroutines must
+// synchronize access manually.
+//
+// Drafts are automatically removed from the provider's map when Flush() succeeds.
+type Draft struct {
+	api      *tgapi.API
+	provider *DraftProvider
+
+	chatID          int64
 	messageThreadID int
 	parseMode       tgapi.ParseMode
 	entities        []tgapi.MessageEntity
@@ -52,28 +131,123 @@ type Draft struct {
 	Message string
 }
 
-func NewRandomDraftProvider(api *tgapi.API) *DraftProvider {
-	return &DraftProvider{
-		api: api, generator: &RandomDraftIdGenerator{},
-		drafts: make(map[uint64]*Draft),
+// NewDraft creates a new draft with the provided parse mode.
+//
+// The draft inherits the provider's chatID, messageThreadID, and entities.
+// If parseMode is zero, the provider's default parseMode is used.
+//
+// Panics if chatID is zero — call SetChat() on the provider first.
+func (p *DraftProvider) NewDraft(parseMode tgapi.ParseMode) *Draft {
+	id := p.generator.Next()
+	draft := &Draft{
+		api:       p.api,
+		provider:  p,
+		parseMode: parseMode,
+		ID:        id,
+		Message:   "",
 	}
-}
-func NewLinearDraftProvider(api *tgapi.API, startValue uint64) *DraftProvider {
-	return &DraftProvider{
-		api:       api,
-		generator: &LinearDraftIdGenerator{lastId: startValue},
-		drafts:    make(map[uint64]*Draft),
-	}
-}
-func (d *DraftProvider) NewDraft() *Draft {
-	id := d.generator.Next()
-	draft := &Draft{d.api, d.chatID, d.messageThreadID, d.parseMode, d.entities, id, ""}
-	d.drafts[id] = draft
+	p.mu.Lock()
+	p.drafts[id] = draft
+	p.mu.Unlock()
 	return draft
 }
 
-func (d *Draft) Push(newText string) error {
-	d.Message += newText
+// SetChat overrides the draft's target chat and message thread.
+//
+// This is useful for sending a draft to a different chat than the provider's default.
+func (d *Draft) SetChat(chatID int64, messageThreadID int) *Draft {
+	d.chatID = chatID
+	d.messageThreadID = messageThreadID
+	return d
+}
+
+// SetEntities replaces the draft's message entities.
+//
+// Entities are stored by reference. If you plan to mutate the slice later,
+// pass a copy: `SetEntities(append([]tgapi.MessageEntity{}, myEntities...))`.
+func (d *Draft) SetEntities(entities []tgapi.MessageEntity) *Draft {
+	d.entities = entities
+	return d
+}
+
+// Push appends text to the draft and attempts to update the server-side draft.
+//
+// Returns an error if the Telegram API rejects the update (e.g., due to network issues).
+// The draft's Message field is always updated, even if the API call fails.
+//
+// Use this method to build the message incrementally.
+func (d *Draft) Push(text string) error {
+	return d.push(text)
+}
+
+// GetMessage returns the current content of the draft.
+//
+// Useful for inspection, logging, or validation before flushing.
+func (d *Draft) GetMessage() string {
+	return d.Message
+}
+
+// Clear resets the draft's message content to empty string.
+//
+// Does not affect server-side draft — use Flush() for that.
+func (d *Draft) Clear() {
+	d.Message = ""
+}
+
+// Delete removes the draft from its provider and clears its content.
+//
+// This is an internal method used by Flush(). You may call it manually if you
+// want to cancel a draft without sending it.
+func (d *Draft) Delete() {
+	if d.provider != nil {
+		d.provider.mu.Lock()
+		delete(d.provider.drafts, d.ID)
+		d.provider.mu.Unlock()
+	}
+	d.Clear()
+}
+
+// Flush sends the draft as a final message and clears it locally.
+//
+// If successful:
+//   - The message is sent to Telegram.
+//   - The draft's content is cleared.
+//   - The draft is removed from the provider's map.
+//
+// If an error occurs:
+//   - The message is NOT sent.
+//   - The draft remains in the provider and retains its content.
+//   - You can call Flush() again to retry.
+//
+// If the draft is empty, Flush() returns nil without calling the API.
+func (d *Draft) Flush() error {
+	if d.Message == "" {
+		return nil
+	}
+
+	params := tgapi.SendMessageP{
+		ChatID:    d.chatID,
+		ParseMode: d.parseMode,
+		Entities:  d.entities,
+		Text:      d.Message,
+	}
+	if d.messageThreadID > 0 {
+		params.MessageThreadID = d.messageThreadID
+	}
+
+	_, err := d.api.SendMessage(params)
+	if err == nil {
+		d.Delete()
+	}
+	return err
+}
+
+// push is the internal helper for Push(). It updates the server draft via SendMessageDraft.
+func (d *Draft) push(text string) error {
+	if d.chatID == 0 {
+		return ErrDraftChatIDZero
+	}
+	d.Message += text
 	params := tgapi.SendMessageDraftP{
 		ChatID:    d.chatID,
 		DraftID:   d.ID,

go.mod

@@ -5,13 +5,13 @@ go 1.26
 require (
 	git.nix13.pw/scuroneko/extypes v1.2.1
 	git.nix13.pw/scuroneko/slog v1.0.2
-	github.com/alitto/pond/v2 v2.6.2
-	golang.org/x/time v0.14.0
+	github.com/alitto/pond/v2 v2.7.0
+	golang.org/x/time v0.15.0
 )
 
 require (
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	golang.org/x/sys v0.41.0 // indirect
+	golang.org/x/sys v0.42.0 // indirect
 )

go.sum

@@ -2,8 +2,8 @@ git.nix13.pw/scuroneko/extypes v1.2.1 h1:IYrOjnWKL2EAuJYtYNa+luB1vBe6paE8VY/YD+5
 git.nix13.pw/scuroneko/extypes v1.2.1/go.mod h1:uZVs8Yo3RrYAG9dMad6qR6lsYY67t+459D9c65QAYAw=
 git.nix13.pw/scuroneko/slog v1.0.2 h1:vZyUROygxC2d5FJHUQM/30xFEHY1JT/aweDZXA4rm2g=
 git.nix13.pw/scuroneko/slog v1.0.2/go.mod h1:3Qm2wzkR5KjwOponMfG7TcGSDjmYaFqRAmLvSPTuWJI=
-github.com/alitto/pond/v2 v2.6.2 h1:Sphe40g0ILeM1pA2c2K+Th0DGU+pt0A/Kprr+WB24Pw=
-github.com/alitto/pond/v2 v2.6.2/go.mod h1:xkjYEgQ05RSpWdfSd1nM3OVv7TBhLdy7rMp3+2Nq+yE=
+github.com/alitto/pond/v2 v2.7.0 h1:c76L+yN916m/DRXjGCeUBHHu92uWnh/g1bwVk4zyyXg=
+github.com/alitto/pond/v2 v2.7.0/go.mod h1:xkjYEgQ05RSpWdfSd1nM3OVv7TBhLdy7rMp3+2Nq+yE=
 github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHPsaIE=
@@ -11,7 +11,7 @@ github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stg
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
-golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
+golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
+golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/time v0.15.0 h1:bbrp8t3bGUeFOx08pvsMYRTCVSMk89u4tKbNOZbp88U=
+golang.org/x/time v0.15.0/go.mod h1:Y4YMaQmXwGQZoFaVFk4YpCt4FLQMYKZe9oeV/f4MSno=

handler.go

@@ -3,21 +3,35 @@ package laniakea
 import (
 	"encoding/base64"
 	"encoding/json"
+	"errors"
+	"fmt"
 	"strings"
 
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
 )
 
+// ErrInvalidPayloadType is returned when callback payload encoding type is unknown.
+var ErrInvalidPayloadType = errors.New("invalid payload type")
+
 func (bot *Bot[T]) handle(u *tgapi.Update) {
+	defer func() {
+		if r := recover(); r != nil {
+			bot.logger.Errorln(fmt.Sprintf("panic in handle: %v", r))
+		}
+	}()
+
 	ctx := &MsgContext{
 		Update: *u, Api: bot.api,
 		botLogger:     bot.logger,
 		errorTemplate: bot.errorTemplate,
 		l10n:          bot.l10n,
 		draftProvider: bot.draftProvider,
+		payloadType:   bot.payloadType,
 	}
 	for _, middleware := range bot.middlewares {
-		middleware.Execute(ctx, bot.dbContext)
+		if !middleware.Execute(ctx, bot.dbContext) {
+			return
+		}
 	}
 
 	if u.CallbackQuery != nil {
@@ -31,6 +45,9 @@ func (bot *Bot[T]) handleMessage(update *tgapi.Update, ctx *MsgContext) {
 	if update.Message == nil {
 		return
 	}
+	if update.Message.From == nil {
+		return
+	}
 
 	var text string
 	if len(update.Message.Text) > 0 {
@@ -49,46 +66,45 @@ func (bot *Bot[T]) handleMessage(update *tgapi.Update, ctx *MsgContext) {
 	ctx.From = update.Message.From
 	ctx.Msg = update.Message
 
+	// Убираем префикс
 	text = strings.TrimSpace(text[len(prefix):])
 
+	// Извлекаем команду как первое слово
+	spaceIndex := strings.Index(text, " ")
+	var cmd string
+	var args string
+
+	if spaceIndex == -1 {
+		cmd = text
+		args = ""
+	} else {
+		cmd = text[:spaceIndex]
+		args = strings.TrimSpace(text[spaceIndex:])
+	}
+
+	if strings.Contains(cmd, "@") {
+		botUsername := bot.username
+		if botUsername != "" && strings.HasSuffix(cmd, "@"+botUsername) {
+			cmd = cmd[:len(cmd)-len("@"+botUsername)] // убираем @botname
+		}
+	}
+
+	// Ищем команду по точному совпадению
 	for _, plugin := range bot.plugins {
-		for cmd := range plugin.commands {
-			if !strings.HasPrefix(text, cmd) {
-				continue
-			}
-			requestParts := strings.Split(text, " ")
-			cmdParts := strings.Split(cmd, " ")
-			isValid := true
-			for i, part := range cmdParts {
-				if part != requestParts[i] {
-					isValid = false
-					break
-				}
-			}
-
-			if !isValid {
-				continue
-			}
-
-			ctx.Text = strings.TrimSpace(text[len(cmd):])
-			if ctx.Text == "" {
-				ctx.Args = []string{}
-			} else {
-				ctx.Args = strings.Split(ctx.Text, " ")
-			}
-
+		if _, exists := plugin.commands[cmd]; exists {
+			ctx.Text = args
+			ctx.Args = strings.Fields(args) // Убирает лишние пробелы
 			if !plugin.executeMiddlewares(ctx, bot.dbContext) {
 				return
 			}
-			go plugin.executeCmd(cmd, ctx, bot.dbContext)
+			plugin.executeCmd(cmd, ctx, bot.dbContext)
 			return
 		}
 	}
 }
 
 func (bot *Bot[T]) handleCallback(update *tgapi.Update, ctx *MsgContext) {
-	data := new(CallbackData)
-	err := json.Unmarshal([]byte(update.CallbackQuery.Data), data)
+	data, err := bot.decodePayload(update.CallbackQuery.Data)
 	if err != nil {
 		bot.logger.Errorln(err)
 		return
@@ -96,8 +112,13 @@ func (bot *Bot[T]) handleCallback(update *tgapi.Update, ctx *MsgContext) {
 
 	ctx.FromID = update.CallbackQuery.From.ID
 	ctx.From = &update.CallbackQuery.From
-	ctx.Msg = &update.CallbackQuery.Message
-	ctx.CallbackMsgId = update.CallbackQuery.Message.MessageID
+	if update.CallbackQuery.Message != nil {
+		ctx.Msg = update.CallbackQuery.Message
+		ctx.CallbackMsgId = update.CallbackQuery.Message.MessageID
+	}
+	if update.CallbackQuery.InlineMessageID != nil {
+		ctx.InlineMsgId = *update.CallbackQuery.InlineMessageID
+	}
 	ctx.CallbackQueryId = update.CallbackQuery.ID
 	ctx.Args = data.Args
 
@@ -110,7 +131,7 @@ func (bot *Bot[T]) handleCallback(update *tgapi.Update, ctx *MsgContext) {
 		if !plugin.executeMiddlewares(ctx, bot.dbContext) {
 			return
 		}
-		go plugin.executePayload(data.Command, ctx, bot.dbContext)
+		plugin.executePayload(data.Command, ctx, bot.dbContext)
 		return
 	}
 }
@@ -141,14 +162,40 @@ func encodeBase64Payload(d CallbackData) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	dst := make([]byte, base64.StdEncoding.EncodedLen(len([]byte(data))))
-	base64.StdEncoding.Encode(dst, []byte(data))
+	dst := make([]byte, base64.RawURLEncoding.EncodedLen(len([]byte(data))))
+	base64.RawURLEncoding.Encode(dst, []byte(data))
 	return string(dst), nil
 }
+
+//	func encodePayload(payloadType BotPayloadType, d CallbackData) (string, error) {
+//		switch payloadType {
+//		case BotPayloadBase64:
+//			return encodeBase64Payload(d)
+//		case BotPayloadJson:
+//			return encodeJsonPayload(d)
+//		}
+//		return "", ErrInvalidPayloadType
+//	}
 func decodeBase64Payload(s string) (CallbackData, error) {
-	b, err := base64.StdEncoding.DecodeString(s)
+	b, err := base64.RawURLEncoding.DecodeString(s)
 	if err != nil {
 		return CallbackData{}, err
 	}
 	return decodeJsonPayload(string(b))
 }
+func decodePayload(payloadType BotPayloadType, s string) (CallbackData, error) {
+	switch payloadType {
+	case BotPayloadBase64:
+		return decodeBase64Payload(s)
+	case BotPayloadJson:
+		return decodeJsonPayload(s)
+	}
+	return CallbackData{}, ErrInvalidPayloadType
+}
+
+//	func (bot *Bot[T]) encodePayload(d CallbackData) (string, error) {
+//		return encodePayload(bot.payloadType, d)
+//	}
+func (bot *Bot[T]) decodePayload(s string) (CallbackData, error) {
+	return decodePayload(bot.payloadType, s)
+}

keyboard.go

@@ -1,19 +1,32 @@
 package laniakea
 
 import (
-	"encoding/json"
 	"fmt"
 
 	"git.nix13.pw/scuroneko/extypes"
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
 )
 
+// ButtonStyleDanger, ButtonStyleSuccess, ButtonStylePrimary are predefined
+// Telegram keyboard button styles for visual feedback.
+//
+// These values map directly to Telegram Bot API's InlineKeyboardButton style field.
 const (
 	ButtonStyleDanger  tgapi.KeyboardButtonStyle = "danger"
 	ButtonStyleSuccess tgapi.KeyboardButtonStyle = "success"
 	ButtonStylePrimary tgapi.KeyboardButtonStyle = "primary"
 )
 
+// InlineKbButtonBuilder is a fluent builder for creating a single inline keyboard button.
+//
+// Use NewInlineKbButton() to start, then chain methods to configure:
+//   - SetIconCustomEmojiId() — adds a custom emoji icon
+//   - SetStyle() — sets visual style (danger/success/primary)
+//   - SetUrl() — makes button open a URL
+//   - SetCallbackDataJson() — attaches structured command + args for bot handling
+//
+// Call build() to produce the final tgapi.InlineKeyboardButton.
+// Builder methods are immutable — each returns a copy.
 type InlineKbButtonBuilder struct {
 	text              string
 	iconCustomEmojiID string
@@ -22,26 +35,56 @@ type InlineKbButtonBuilder struct {
 	callbackData      string
 }
 
+// NewInlineKbButton creates a new button builder with the given display text.
+// The button will have no URL, no style, and no callback data by default.
 func NewInlineKbButton(text string) InlineKbButtonBuilder {
 	return InlineKbButtonBuilder{text: text}
 }
+
+// SetIconCustomEmojiId sets a custom emoji ID to display as the button's icon.
+// This is a Telegram Bot API feature for custom emoji icons.
 func (b InlineKbButtonBuilder) SetIconCustomEmojiId(id string) InlineKbButtonBuilder {
 	b.iconCustomEmojiID = id
 	return b
 }
+
+// SetStyle sets the visual style of the button.
+// Valid values: ButtonStyleDanger, ButtonStyleSuccess, ButtonStylePrimary.
+// If not set, the button uses the default style.
 func (b InlineKbButtonBuilder) SetStyle(style tgapi.KeyboardButtonStyle) InlineKbButtonBuilder {
 	b.style = style
 	return b
 }
+
+// SetUrl sets a URL that will be opened when the button is pressed.
+// If both URL and CallbackData are set, Telegram will prioritize URL.
 func (b InlineKbButtonBuilder) SetUrl(url string) InlineKbButtonBuilder {
 	b.url = url
 	return b
 }
-func (b InlineKbButtonBuilder) SetCallbackData(cmd string, args ...any) InlineKbButtonBuilder {
+
+// SetCallbackDataJson sets a structured callback payload that will be sent to the bot
+// when the button is pressed. The command and arguments are serialized as JSON.
+//
+// Args are converted to strings using fmt.Sprint. Non-string types (e.g., int, bool)
+// are safely serialized, but complex structs may not serialize usefully.
+//
+// Example: SetCallbackDataJson("delete_user", 123, "confirm") → {"cmd":"delete_user","args":["123","confirm"]}.
+func (b InlineKbButtonBuilder) SetCallbackDataJson(cmd string, args ...any) InlineKbButtonBuilder {
 	b.callbackData = NewCallbackData(cmd, args...).ToJson()
 	return b
 }
 
+// SetCallbackDataBase64 sets a structured callback payload encoded as Base64.
+// This can be useful when the JSON payload exceeds Telegram's callback data length limit.
+// Args are converted to strings using fmt.Sprint.
+func (b InlineKbButtonBuilder) SetCallbackDataBase64(cmd string, args ...any) InlineKbButtonBuilder {
+	b.callbackData = NewCallbackData(cmd, args...).ToBase64()
+	return b
+}
+
+// build converts the builder state into a tgapi.InlineKeyboardButton.
+// This method is typically called internally by InlineKeyboard.AddButton().
 func (b InlineKbButtonBuilder) build() tgapi.InlineKeyboardButton {
 	return tgapi.InlineKeyboardButton{
 		Text:              b.text,
@@ -52,20 +95,59 @@ func (b InlineKbButtonBuilder) build() tgapi.InlineKeyboardButton {
 	}
 }
 
+// InlineKeyboard is a stateful builder for constructing Telegram inline keyboard layouts.
+//
+// Buttons are added row-by-row. When a row reaches maxRow, it is automatically flushed.
+// Call AddLine() to manually end a row, or Get() to finalize and retrieve the markup.
+//
+// The keyboard is not thread-safe. Build it in a single goroutine.
 type InlineKeyboard struct {
-	CurrentLine extypes.Slice[tgapi.InlineKeyboardButton]
-	Lines       [][]tgapi.InlineKeyboardButton
-	maxRow      int
+	CurrentLine extypes.Slice[tgapi.InlineKeyboardButton] // Current row being built
+	Lines       [][]tgapi.InlineKeyboardButton            // Completed rows
+	maxRow      int                                       // Max buttons per row (e.g., 3 or 4)
+
+	payloadType BotPayloadType // Serialization format for callback data (JSON or Base64)
 }
 
-func NewInlineKeyboard(maxRow int) *InlineKeyboard {
+// NewInlineKeyboardJson creates a new keyboard builder with the specified maximum
+// number of buttons per row.
+//
+// Example: NewInlineKeyboardJson(3) creates a keyboard with at most 3 buttons per line.
+func NewInlineKeyboardJson(maxRow int) *InlineKeyboard {
+	return NewInlineKeyboard(BotPayloadJson, maxRow)
+}
+
+// NewInlineKeyboardBase64 creates a new keyboard builder with the specified maximum
+// number of buttons per row, using Base64 encoding for button payloads.
+//
+// Example: NewInlineKeyboardBase64(3) creates a keyboard with at most 3 buttons per line.
+func NewInlineKeyboardBase64(maxRow int) *InlineKeyboard {
+	return NewInlineKeyboard(BotPayloadBase64, maxRow)
+}
+
+// NewInlineKeyboard creates a new keyboard builder with the specified payload encoding
+// type and maximum number of buttons per row.
+//
+// Use NewInlineKeyboardJson or NewInlineKeyboardBase64 for the common cases.
+func NewInlineKeyboard(payloadType BotPayloadType, maxRow int) *InlineKeyboard {
 	return &InlineKeyboard{
 		CurrentLine: make(extypes.Slice[tgapi.InlineKeyboardButton], 0),
 		Lines:       make([][]tgapi.InlineKeyboardButton, 0),
 		maxRow:      maxRow,
+		payloadType: payloadType,
 	}
 }
 
+// SetPayloadType sets the serialization format for callback data added via
+// AddCallbackButton and AddCallbackButtonStyle methods.
+// It should be one of BotPayloadJson or BotPayloadBase64.
+func (in *InlineKeyboard) SetPayloadType(t BotPayloadType) *InlineKeyboard {
+	in.payloadType = t
+	return in
+}
+
+// append adds a button to the current line. If the line is full, it auto-flushes.
+// This is an internal helper used by other builder methods.
 func (in *InlineKeyboard) append(button tgapi.InlineKeyboardButton) *InlineKeyboard {
 	if in.CurrentLine.Len() == in.maxRow {
 		in.AddLine()
@@ -74,27 +156,45 @@ func (in *InlineKeyboard) append(button tgapi.InlineKeyboardButton) *InlineKeybo
 	return in
 }
 
+// AddUrlButton adds a button that opens a URL when pressed.
+// No callback data is attached.
 func (in *InlineKeyboard) AddUrlButton(text, url string) *InlineKeyboard {
 	return in.append(tgapi.InlineKeyboardButton{Text: text, URL: url})
 }
+
+// AddUrlButtonStyle adds a button with a visual style that opens a URL.
+// Style must be one of: ButtonStyleDanger, ButtonStyleSuccess, ButtonStylePrimary.
 func (in *InlineKeyboard) AddUrlButtonStyle(text string, style tgapi.KeyboardButtonStyle, url string) *InlineKeyboard {
 	return in.append(tgapi.InlineKeyboardButton{Text: text, Style: style, URL: url})
 }
+
+// AddCallbackButton adds a button that sends a structured callback payload to the bot.
+// The command and args are serialized according to the current payloadType.
 func (in *InlineKeyboard) AddCallbackButton(text string, cmd string, args ...any) *InlineKeyboard {
 	return in.append(tgapi.InlineKeyboardButton{
-		Text: text, CallbackData: NewCallbackData(cmd, args...).ToJson(),
+		Text:         text,
+		CallbackData: NewCallbackData(cmd, args...).Encode(in.payloadType),
 	})
 }
+
+// AddCallbackButtonStyle adds a styled callback button.
+// Style affects visual appearance; callback data is sent to bot on press.
 func (in *InlineKeyboard) AddCallbackButtonStyle(text string, style tgapi.KeyboardButtonStyle, cmd string, args ...any) *InlineKeyboard {
 	return in.append(tgapi.InlineKeyboardButton{
-		Text: text, Style: style,
-		CallbackData: NewCallbackData(cmd, args...).ToJson(),
+		Text:         text,
+		Style:        style,
+		CallbackData: NewCallbackData(cmd, args...).Encode(in.payloadType),
 	})
 }
+
+// AddButton adds a button pre-configured via InlineKbButtonBuilder.
+// This is the most flexible way to create buttons with custom emoji, style, URL, and callback.
 func (in *InlineKeyboard) AddButton(b InlineKbButtonBuilder) *InlineKeyboard {
 	return in.append(b.build())
 }
 
+// AddLine manually ends the current row and starts a new one.
+// If the current row is empty, nothing happens.
 func (in *InlineKeyboard) AddLine() *InlineKeyboard {
 	if in.CurrentLine.Len() == 0 {
 		return in
@@ -103,18 +203,38 @@ func (in *InlineKeyboard) AddLine() *InlineKeyboard {
 	in.CurrentLine = make(extypes.Slice[tgapi.InlineKeyboardButton], 0)
 	return in
 }
+
+// Get finalizes the keyboard and returns a tgapi.ReplyMarkup.
+// Automatically flushes the current line if not empty.
+//
+// Returns a pointer to a ReplyMarkup suitable for use with tgapi.SendMessage.
 func (in *InlineKeyboard) Get() *tgapi.ReplyMarkup {
 	if in.CurrentLine.Len() > 0 {
-		in.Lines = append(in.Lines, in.CurrentLine)
+		in.AddLine()
 	}
 	return &tgapi.ReplyMarkup{InlineKeyboard: in.Lines}
 }
 
+// CallbackData represents the structured payload sent when an inline button
+// with callback data is pressed.
+//
+// This structure is serialized to JSON and sent to the bot as a string.
+// The bot should parse this back to determine the command and arguments.
+//
+// Example:
+//
+//	{"cmd":"delete_user","args":["123","confirm"]}
 type CallbackData struct {
-	Command string   `json:"cmd"`
-	Args    []string `json:"args"`
+	Command string   `json:"cmd"`  // The command name to route to
+	Args    []string `json:"args"` // Arguments passed as strings
 }
 
+// NewCallbackData creates a new CallbackData instance with the given command and args.
+//
+// All args are converted to strings using fmt.Sprint. This is safe for primitives
+// (int, string, bool, float64) but may not serialize complex structs meaningfully.
+//
+// Use this to build callback payloads for bot command routing.
 func NewCallbackData(command string, args ...any) *CallbackData {
 	stringArgs := make([]string, len(args))
 	for i, arg := range args {
@@ -125,10 +245,42 @@ func NewCallbackData(command string, args ...any) *CallbackData {
 		Args:    stringArgs,
 	}
 }
+
+// ToJson serializes the CallbackData to a JSON string.
+//
+// If serialization fails (e.g., due to unmarshalable fields), returns a fallback
+// JSON object: {"cmd":""} to prevent breaking Telegram's API.
+//
+// This fallback ensures the bot receives a valid JSON payload even if internal
+// errors occur — avoiding "invalid callback_data" errors from Telegram.
 func (d *CallbackData) ToJson() string {
-	data, err := json.Marshal(d)
+	data, err := encodeJsonPayload(*d)
 	if err != nil {
+		// Fallback: return minimal valid JSON to avoid Telegram API rejection
 		return `{"cmd":""}`
 	}
-	return string(data)
+	return data
+}
+
+// ToBase64 serializes the CallbackData to a JSON string and then encodes it as Base64.
+// Returns an empty string if serialization or encoding fails.
+func (d *CallbackData) ToBase64() string {
+	s, err := encodeBase64Payload(*d)
+	if err != nil {
+		return ``
+	}
+	return s
+}
+
+// Encode serializes the CallbackData according to the specified payload type.
+// Supported types: BotPayloadJson and BotPayloadBase64.
+// For unknown types, returns an empty string.
+func (d *CallbackData) Encode(t BotPayloadType) string {
+	switch t {
+	case BotPayloadBase64:
+		return d.ToBase64()
+	case BotPayloadJson:
+		return d.ToJson()
+	}
+	return ""
 }

l10n.go

@@ -1,26 +1,76 @@
 package laniakea
 
-// DictEntry {key:{ru:123,en:123}}
+// DictEntry represents a single localized entry with language-to-text mappings.
+// Example: {"ru": "Привет", "en": "Hello"}.
 type DictEntry map[string]string
+
+// L10n is a localization manager that maps keys to language-specific strings.
 type L10n struct {
-	entries      map[string]DictEntry
-	fallbackLang string
+	entries      map[string]DictEntry // Map of translation keys to language dictionaries
+	fallbackLang string               // Language code to use when requested language is missing
 }
 
+// NewL10n creates a new L10n instance with the specified fallback language.
+// The fallback language is used when a requested language is not available
+// for a given key.
+//
+// Example: NewL10n("en") will return "Hello" for key "greeting" if "ru" is requested
+// but no "ru" entry exists.
 func NewL10n(fallbackLanguage string) *L10n {
-	return &L10n{make(map[string]DictEntry), fallbackLanguage}
+	return &L10n{
+		entries:      make(map[string]DictEntry),
+		fallbackLang: fallbackLanguage,
+	}
 }
+
+// AddDictEntry adds a new translation entry for the given key.
+// The value must be a DictEntry mapping language codes (e.g., "en", "ru") to their translated strings.
+//
+// If a key already exists, it is overwritten.
+//
+// Returns the L10n instance for method chaining.
 func (l *L10n) AddDictEntry(key string, value DictEntry) *L10n {
 	l.entries[key] = value
 	return l
 }
+
+// GetFallbackLanguage returns the currently configured fallback language code.
 func (l *L10n) GetFallbackLanguage() string {
 	return l.fallbackLang
 }
+
+// Translate retrieves the translation for the given key and language.
+//
+// Behavior:
+//   - If the key exists and the language has a translation → returns the translation
+//   - If the key exists but the language is missing → returns the fallback language's value
+//   - If the key does not exist → returns the key string itself (as fallback)
+//
+// Example:
+//
+//	l.AddDictEntry("greeting", DictEntry{"en": "Hello", "ru": "Привет"})
+//	l.Translate("en", "greeting") → "Hello"
+//	l.Translate("es", "greeting") → "Hello" (fallback to "en")
+//	l.Translate("en", "unknown") → "unknown" (key not found)
+//
+// This behavior ensures that missing translations do not break UI or logs —
+// instead, the original key is displayed, making it easy to identify gaps.
 func (l *L10n) Translate(lang, key string) string {
-	s, ok := l.entries[key]
-	if !ok {
-		return key
+	entries, exists := l.entries[key]
+	if !exists {
+		return key // Return key as fallback when translation is missing
 	}
-	return s[lang]
+
+	// Try requested language
+	if translation, ok := entries[lang]; ok {
+		return translation
+	}
+
+	// Fall back to configured fallback language
+	if fallback, ok := entries[l.fallbackLang]; ok {
+		return fallback
+	}
+
+	// If fallback language is also missing, return the key
+	return key
 }

methods.go

@@ -6,6 +6,38 @@ import (
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
 )
 
+// Updates fetches new updates from Telegram API using long polling.
+// It respects the bot's current update offset and automatically advances it
+// after successful retrieval. The method supports selective update types
+// through AllowedUpdates and includes optional request logging.
+//
+// Parameters:
+//   - None (uses bot's internal state for offset and allowed updates)
+//
+// Returns:
+//   - []tgapi.Update: slice of received updates (empty if none available)
+//   - error: any error encountered during the API call
+//
+// Behavior:
+//  1. Uses the bot's current update offset (via GetUpdateOffset)
+//  2. Requests updates with 30-second timeout
+//  3. Filters updates by types specified in bot.GetUpdateTypes()
+//  4. Logs raw update JSON if RequestLogger is configured
+//  5. Automatically updates the offset to the last received update ID + 1
+//  6. Returns all received updates (empty slice if none)
+//
+// Note: This is a blocking call that waits up to 30 seconds for new updates.
+// For non-blocking behavior, consider using webhooks instead.
+//
+// Example:
+//
+//	updates, err := bot.Updates()
+//	if err != nil {
+//	    log.Fatal(err)
+//	}
+//	for _, update := range updates {
+//	    // process update
+//	}
 func (bot *Bot[T]) Updates() ([]tgapi.Update, error) {
 	offset := bot.GetUpdateOffset()
 	params := tgapi.UpdateParams{

msg_context.go

@@ -1,22 +1,28 @@
 package laniakea
 
 import (
+	"context"
 	"fmt"
+	"time"
 
 	"git.nix13.pw/scuroneko/laniakea/tgapi"
-	"git.nix13.pw/scuroneko/laniakea/utils"
 	"git.nix13.pw/scuroneko/slog"
 )
 
+// MsgContext holds the context for handling a Telegram message or callback query.
+// It provides methods to respond, edit, delete, and translate messages, as well as
+// manage inline keyboards and message drafts.
 type MsgContext struct {
-	Api *tgapi.API
+	Api    *tgapi.API
+	Update tgapi.Update
 
-	Msg             *tgapi.Message
-	Update          tgapi.Update
-	From            *tgapi.User
+	Msg  *tgapi.Message
+	From *tgapi.User
+
+	InlineMsgId     string
 	CallbackMsgId   int
 	CallbackQueryId string
-	FromID          int
+	FromID          int64
 	Prefix          string
 	Text            string
 	Args            []string
@@ -25,21 +31,34 @@ type MsgContext struct {
 	botLogger     *slog.Logger
 	l10n          *L10n
 	draftProvider *DraftProvider
+	payloadType   BotPayloadType
 }
 
+// AnswerMessage represents a message sent or edited via MsgContext.
+// It holds metadata to allow further editing or deletion.
 type AnswerMessage struct {
 	MessageID int
 	Text      string
 	IsMedia   bool
-	ctx       *MsgContext
+	ctx       *MsgContext // internal back-reference
 }
 
-func (ctx *MsgContext) edit(messageId int, text string, keyboard *InlineKeyboard) *AnswerMessage {
+// edit is an internal helper to edit a message's text with optional keyboard and parse mode.
+// Used by Edit, EditMarkdown, EditCallback, etc.
+func (ctx *MsgContext) edit(messageId int, text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
 	params := tgapi.EditMessageTextP{
-		MessageID: messageId,
-		ChatID:    ctx.Msg.Chat.ID,
 		Text:      text,
-		ParseMode: tgapi.ParseMD,
+		ParseMode: parseMode,
+	}
+	switch {
+	case messageId > 0 && ctx.Msg != nil:
+		params.MessageID = messageId
+		params.ChatID = ctx.Msg.Chat.ID
+	case ctx.InlineMsgId != "":
+		params.InlineMessageID = ctx.InlineMsgId
+	default:
+		ctx.botLogger.Errorln("Can't edit message: no valid message target")
+		return nil
 	}
 	if keyboard != nil {
 		params.ReplyMarkup = keyboard.Get()
@@ -49,31 +68,79 @@ func (ctx *MsgContext) edit(messageId int, text string, keyboard *InlineKeyboard
 		ctx.botLogger.Errorln(err)
 		return nil
 	}
+	resultMessageID := messageId
+	if msg.MessageID > 0 {
+		resultMessageID = msg.MessageID
+	}
 	return &AnswerMessage{
-		MessageID: msg.MessageID, ctx: ctx, Text: text, IsMedia: false,
+		MessageID: resultMessageID, ctx: ctx, Text: text, IsMedia: false,
 	}
 }
+
+// Edit replaces the text of the message without changing the keyboard or parse mode.
+// Uses ParseNone (plain text).
 func (m *AnswerMessage) Edit(text string) *AnswerMessage {
-	return m.ctx.edit(m.MessageID, text, nil)
+	return m.ctx.edit(m.MessageID, text, nil, tgapi.ParseNone)
 }
-func (ctx *MsgContext) EditCallback(text string, keyboard *InlineKeyboard) *AnswerMessage {
-	if ctx.CallbackMsgId == 0 {
+
+// EditMarkdown replaces the text of the message using MarkdownV2 formatting.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+// Unescaped input may cause Telegram API errors or broken formatting.
+func (m *AnswerMessage) EditMarkdown(text string) *AnswerMessage {
+	return m.ctx.edit(m.MessageID, text, nil, tgapi.ParseMDV2)
+}
+
+// editCallback is an internal helper to edit the message associated with a callback query.
+// Supports both regular callback messages and inline callback messages.
+func (ctx *MsgContext) editCallback(text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
+	if ctx.CallbackMsgId == 0 && ctx.InlineMsgId == "" {
 		ctx.botLogger.Errorln("Can't edit non-callback update message")
 		return nil
 	}
-
-	return ctx.edit(ctx.CallbackMsgId, text, keyboard)
+	return ctx.edit(ctx.CallbackMsgId, text, keyboard, parseMode)
 }
+
+// EditCallback edits the callback message using plain text (ParseNone).
+func (ctx *MsgContext) EditCallback(text string, keyboard *InlineKeyboard) *AnswerMessage {
+	return ctx.editCallback(text, keyboard, tgapi.ParseNone)
+}
+
+// EditCallbackMarkdown edits the callback message using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) EditCallbackMarkdown(text string, keyboard *InlineKeyboard) *AnswerMessage {
+	return ctx.editCallback(text, keyboard, tgapi.ParseMDV2)
+}
+
+// EditCallbackf formats a string using fmt.Sprintf and edits the callback message with plain text.
 func (ctx *MsgContext) EditCallbackf(format string, keyboard *InlineKeyboard, args ...any) *AnswerMessage {
-	return ctx.EditCallback(fmt.Sprintf(format, args...), keyboard)
+	return ctx.editCallback(fmt.Sprintf(format, args...), keyboard, tgapi.ParseNone)
 }
 
-func (ctx *MsgContext) editPhotoText(messageId int, text string, kb *InlineKeyboard) *AnswerMessage {
+// EditCallbackfMarkdown formats a string using fmt.Sprintf and edits the callback message with MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) EditCallbackfMarkdown(format string, keyboard *InlineKeyboard, args ...any) *AnswerMessage {
+	return ctx.editCallback(fmt.Sprintf(format, args...), keyboard, tgapi.ParseMDV2)
+}
+
+// editPhotoText edits the caption of a photo/video message.
+// Returns nil when no valid edit target is available for the current context.
+func (ctx *MsgContext) editPhotoText(messageId int, text string, kb *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
 	params := tgapi.EditMessageCaptionP{
-		ChatID:    ctx.Msg.Chat.ID,
-		MessageID: messageId,
 		Caption:   text,
-		ParseMode: tgapi.ParseMD,
+		ParseMode: parseMode,
+	}
+	switch {
+	case messageId > 0 && ctx.Msg != nil:
+		params.ChatID = ctx.Msg.Chat.ID
+		params.MessageID = messageId
+	case ctx.InlineMsgId != "":
+		params.InlineMessageID = ctx.InlineMsgId
+	default:
+		ctx.botLogger.Errorln("Can't edit caption: no valid message target")
+		return nil
 	}
 	if kb != nil {
 		params.ReplyMarkup = kb.Get()
@@ -82,27 +149,52 @@ func (ctx *MsgContext) editPhotoText(messageId int, text string, kb *InlineKeybo
 	msg, _, err := ctx.Api.EditMessageCaption(params)
 	if err != nil {
 		ctx.botLogger.Errorln(err)
+		return nil
+	}
+	resultMessageID := messageId
+	if msg.MessageID > 0 {
+		resultMessageID = msg.MessageID
 	}
 	return &AnswerMessage{
-		MessageID: msg.MessageID, ctx: ctx, Text: text, IsMedia: true,
+		MessageID: resultMessageID, ctx: ctx, Text: text, IsMedia: true,
 	}
 }
-func (m *AnswerMessage) EditCaption(text string) *AnswerMessage {
-	if m.MessageID == 0 {
-		m.ctx.botLogger.Errorln("Can't edit caption message, message id is zero")
-		return m
-	}
-	return m.ctx.editPhotoText(m.MessageID, text, nil)
-}
-func (m *AnswerMessage) EditCaptionKeyboard(text string, kb *InlineKeyboard) *AnswerMessage {
-	return m.ctx.editPhotoText(m.MessageID, text, kb)
-}
 
-func (ctx *MsgContext) answer(text string, keyboard *InlineKeyboard) *AnswerMessage {
+// EditCaption edits the caption of a media message using plain text.
+func (m *AnswerMessage) EditCaption(text string) *AnswerMessage {
+	return m.ctx.editPhotoText(m.MessageID, text, nil, tgapi.ParseNone)
+}
+
+// EditCaptionMarkdown edits the caption of a media message using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (m *AnswerMessage) EditCaptionMarkdown(text string) *AnswerMessage {
+	return m.ctx.editPhotoText(m.MessageID, text, nil, tgapi.ParseMDV2)
+}
+
+// EditCaptionKeyboard edits the caption of a media message with a new inline keyboard (plain text).
+func (m *AnswerMessage) EditCaptionKeyboard(text string, kb *InlineKeyboard) *AnswerMessage {
+	return m.ctx.editPhotoText(m.MessageID, text, kb, tgapi.ParseNone)
+}
+
+// EditCaptionKeyboardMarkdown edits the caption of a media message with a new inline keyboard using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (m *AnswerMessage) EditCaptionKeyboardMarkdown(text string, kb *InlineKeyboard) *AnswerMessage {
+	return m.ctx.editPhotoText(m.MessageID, text, kb, tgapi.ParseMDV2)
+}
+
+// answer sends a new message with optional keyboard and parse mode.
+// Uses API limiter to respect Telegram rate limits per chat.
+func (ctx *MsgContext) answer(text string, keyboard *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
+	if ctx.Msg == nil {
+		ctx.botLogger.Errorln("Can't answer message without a message")
+		return nil
+	}
 	params := tgapi.SendMessageP{
 		ChatID:    ctx.Msg.Chat.ID,
 		Text:      text,
-		ParseMode: tgapi.ParseMD,
+		ParseMode: parseMode,
 	}
 	if keyboard != nil {
 		params.ReplyMarkup = keyboard.Get()
@@ -110,6 +202,9 @@ func (ctx *MsgContext) answer(text string, keyboard *InlineKeyboard) *AnswerMess
 	if ctx.Msg.MessageThreadID > 0 {
 		params.MessageThreadID = ctx.Msg.MessageThreadID
 	}
+	if ctx.Msg.DirectMessageTopic != nil {
+		params.DirectMessagesTopicID = ctx.Msg.DirectMessageTopic.TopicID
+	}
 
 	msg, err := ctx.Api.SendMessage(params)
 	if err != nil {
@@ -120,21 +215,53 @@ func (ctx *MsgContext) answer(text string, keyboard *InlineKeyboard) *AnswerMess
 		MessageID: msg.MessageID, ctx: ctx, IsMedia: false, Text: text,
 	}
 }
+
+// Answer sends a plain text message (ParseNone).
 func (ctx *MsgContext) Answer(text string) *AnswerMessage {
-	return ctx.answer(text, nil)
-}
-func (ctx *MsgContext) Answerf(template string, args ...any) *AnswerMessage {
-	return ctx.answer(fmt.Sprintf(template, args...), nil)
-}
-func (ctx *MsgContext) Keyboard(text string, kb *InlineKeyboard) *AnswerMessage {
-	return ctx.answer(text, kb)
+	return ctx.answer(text, nil, tgapi.ParseNone)
 }
 
-func (ctx *MsgContext) answerPhoto(photoId, text string, kb *InlineKeyboard) *AnswerMessage {
+// AnswerMarkdown sends a message using MarkdownV2 formatting.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) AnswerMarkdown(text string) *AnswerMessage {
+	return ctx.answer(text, nil, tgapi.ParseMDV2)
+}
+
+// Answerf formats a string using fmt.Sprintf and sends it as a plain text message.
+func (ctx *MsgContext) Answerf(template string, args ...any) *AnswerMessage {
+	return ctx.answer(fmt.Sprintf(template, args...), nil, tgapi.ParseNone)
+}
+
+// AnswerfMarkdown formats a string using fmt.Sprintf and sends it using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) AnswerfMarkdown(template string, args ...any) *AnswerMessage {
+	return ctx.answer(fmt.Sprintf(template, args...), nil, tgapi.ParseMDV2)
+}
+
+// Keyboard sends a message with an inline keyboard (plain text).
+func (ctx *MsgContext) Keyboard(text string, kb *InlineKeyboard) *AnswerMessage {
+	return ctx.answer(text, kb, tgapi.ParseNone)
+}
+
+// KeyboardMarkdown sends a message with an inline keyboard using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) KeyboardMarkdown(text string, keyboard *InlineKeyboard) *AnswerMessage {
+	return ctx.answer(text, keyboard, tgapi.ParseMDV2)
+}
+
+// answerPhoto sends a photo with optional caption and keyboard.
+func (ctx *MsgContext) answerPhoto(photoId, text string, kb *InlineKeyboard, parseMode tgapi.ParseMode) *AnswerMessage {
+	if ctx.Msg == nil {
+		ctx.botLogger.Errorln("Can't answer message without a message")
+		return nil
+	}
 	params := tgapi.SendPhotoP{
 		ChatID:    ctx.Msg.Chat.ID,
 		Caption:   text,
-		ParseMode: tgapi.ParseMD,
+		ParseMode: parseMode,
 		Photo:     photoId,
 	}
 	if kb != nil {
@@ -147,22 +274,59 @@ func (ctx *MsgContext) answerPhoto(photoId, text string, kb *InlineKeyboard) *An
 	msg, err := ctx.Api.SendPhoto(params)
 	if err != nil {
 		ctx.botLogger.Errorln(err)
-		return &AnswerMessage{
-			ctx: ctx, Text: text, IsMedia: true,
-		}
+		return nil
 	}
 	return &AnswerMessage{
 		MessageID: msg.MessageID, ctx: ctx, Text: text, IsMedia: true,
 	}
 }
+
+// AnswerPhoto sends a photo with plain text caption.
 func (ctx *MsgContext) AnswerPhoto(photoId, text string) *AnswerMessage {
-	return ctx.answerPhoto(photoId, text, nil)
-}
-func (ctx *MsgContext) AnswerPhotoKeyboard(photoId, text string, kb *InlineKeyboard) *AnswerMessage {
-	return ctx.answerPhoto(photoId, text, kb)
+	return ctx.answerPhoto(photoId, text, nil, tgapi.ParseNone)
 }
 
+// AnswerPhotoMarkdown sends a photo with MarkdownV2 caption.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) AnswerPhotoMarkdown(photoId, text string) *AnswerMessage {
+	return ctx.answerPhoto(photoId, text, nil, tgapi.ParseMDV2)
+}
+
+// AnswerPhotoKeyboard sends a photo with caption and inline keyboard (plain text).
+func (ctx *MsgContext) AnswerPhotoKeyboard(photoId, text string, kb *InlineKeyboard) *AnswerMessage {
+	return ctx.answerPhoto(photoId, text, kb, tgapi.ParseNone)
+}
+
+// AnswerPhotoKeyboardMarkdown sends a photo with caption and inline keyboard using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) AnswerPhotoKeyboardMarkdown(photoId, text string, kb *InlineKeyboard) *AnswerMessage {
+	return ctx.answerPhoto(photoId, text, kb, tgapi.ParseMDV2)
+}
+
+// AnswerPhotof formats a string and sends it as a photo caption (plain text).
+func (ctx *MsgContext) AnswerPhotof(photoId, template string, args ...any) *AnswerMessage {
+	return ctx.answerPhoto(photoId, fmt.Sprintf(template, args...), nil, tgapi.ParseNone)
+}
+
+// AnswerPhotofMarkdown formats a string and sends it as a photo caption using MarkdownV2.
+//
+// ⚠️ WARNING: User input must be escaped with laniakea.EscapeMarkdownV2() before passing here.
+func (ctx *MsgContext) AnswerPhotofMarkdown(photoId, template string, args ...any) *AnswerMessage {
+	return ctx.answerPhoto(photoId, fmt.Sprintf(template, args...), nil, tgapi.ParseMDV2)
+}
+
+// delete removes a message by ID.
 func (ctx *MsgContext) delete(messageId int) {
+	if messageId == 0 {
+		ctx.botLogger.Errorln("Can't delete message: message ID zero")
+		return
+	}
+	if ctx.Msg == nil {
+		ctx.botLogger.Errorln("Can't delete message: no chat message context")
+		return
+	}
 	_, err := ctx.Api.DeleteMessage(tgapi.DeleteMessageP{
 		ChatID:    ctx.Msg.Chat.ID,
 		MessageID: messageId,
@@ -171,9 +335,21 @@ func (ctx *MsgContext) delete(messageId int) {
 		ctx.botLogger.Errorln(err)
 	}
 }
-func (m *AnswerMessage) Delete()        { m.ctx.delete(m.MessageID) }
-func (ctx *MsgContext) CallbackDelete() { ctx.delete(ctx.CallbackMsgId) }
 
+// Delete removes the message associated with this AnswerMessage.
+func (m *AnswerMessage) Delete() { m.ctx.delete(m.MessageID) }
+
+// CallbackDelete deletes the message that triggered the callback query.
+func (ctx *MsgContext) CallbackDelete() {
+	if ctx.CallbackMsgId == 0 {
+		ctx.botLogger.Errorln("Can't delete callback message: no callback message ID")
+		return
+	}
+	ctx.delete(ctx.CallbackMsgId)
+}
+
+// answerCallbackQuery sends a response to a callback query (optional text/alert/url).
+// Does nothing if CallbackQueryId is empty.
 func (ctx *MsgContext) answerCallbackQuery(url, text string, showAlert bool) {
 	if len(ctx.CallbackQueryId) == 0 {
 		return
@@ -186,12 +362,25 @@ func (ctx *MsgContext) answerCallbackQuery(url, text string, showAlert bool) {
 		ctx.botLogger.Errorln(err)
 	}
 }
-func (ctx *MsgContext) AnswerCbQuery()                 { ctx.answerCallbackQuery("", "", false) }
-func (ctx *MsgContext) AnswerCbQueryText(text string)  { ctx.answerCallbackQuery("", text, false) }
-func (ctx *MsgContext) AnswerCbQueryAlert(text string) { ctx.answerCallbackQuery("", text, true) }
-func (ctx *MsgContext) AnswerCbQueryUrl(u string)      { ctx.answerCallbackQuery(u, "", false) }
 
+// AnswerCbQuery answers the callback query with no text or alert.
+func (ctx *MsgContext) AnswerCbQuery() { ctx.answerCallbackQuery("", "", false) }
+
+// AnswerCbQueryText answers the callback query with a text notification.
+func (ctx *MsgContext) AnswerCbQueryText(text string) { ctx.answerCallbackQuery("", text, false) }
+
+// AnswerCbQueryAlert answers the callback query with a user-visible alert.
+func (ctx *MsgContext) AnswerCbQueryAlert(text string) { ctx.answerCallbackQuery("", text, true) }
+
+// AnswerCbQueryUrl answers the callback query with a URL redirect.
+func (ctx *MsgContext) AnswerCbQueryUrl(u string) { ctx.answerCallbackQuery(u, "", false) }
+
+// SendAction sends a chat action (typing, uploading_photo, etc.) to indicate bot activity.
 func (ctx *MsgContext) SendAction(action tgapi.ChatActionType) {
+	if ctx.Msg == nil {
+		ctx.botLogger.Errorln("Can't send action without chat message context")
+		return
+	}
 	params := tgapi.SendChatActionP{
 		ChatID: ctx.Msg.Chat.ID, Action: action,
 	}
@@ -204,24 +393,56 @@ func (ctx *MsgContext) SendAction(action tgapi.ChatActionType) {
 	}
 }
 
+// error sends an error message to the user and logs it.
+// Uses errorTemplate to format the message.
+// For callbacks: sends as callback answer (no alert).
+// For regular messages: sends as plain text.
 func (ctx *MsgContext) error(err error) {
-	text := fmt.Sprintf(ctx.errorTemplate, utils.EscapeMarkdown(err.Error()))
+	text := fmt.Sprintf(ctx.errorTemplate, err.Error())
 
 	if ctx.CallbackQueryId != "" {
 		ctx.answerCallbackQuery("", text, false)
 	} else {
-		ctx.answer(text, nil)
+		ctx.answer(text, nil, tgapi.ParseNone)
 	}
 	ctx.botLogger.Errorln(err)
 }
+
+// Error is an alias for error().
 func (ctx *MsgContext) Error(err error) { ctx.error(err) }
 
-func (ctx *MsgContext) NewDraft() *Draft {
-	draft := ctx.draftProvider.NewDraft()
-	draft.chatID = ctx.Msg.Chat.ID
-	draft.messageThreadID = ctx.Msg.MessageThreadID
+func (ctx *MsgContext) newDraft(parseMode tgapi.ParseMode) *Draft {
+	if ctx.Msg == nil {
+		ctx.botLogger.Errorln("can't create draft: ctx.Msg is nil")
+		return nil
+	}
+
+	c, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := ctx.Api.Limiter.Wait(c, ctx.Msg.Chat.ID); err != nil {
+		ctx.botLogger.Errorln(err)
+		return nil
+	}
+
+	draft := ctx.draftProvider.NewDraft(parseMode).SetChat(ctx.Msg.Chat.ID, ctx.Msg.MessageThreadID)
 	return draft
 }
+
+// NewDraft creates a new message draft associated with the current chat.
+// Uses the API limiter to avoid rate limiting.
+func (ctx *MsgContext) NewDraft() *Draft {
+	return ctx.newDraft(tgapi.ParseNone)
+}
+
+// NewDraftMarkdown creates a new message draft associated with the current chat,
+// with Markdown V2 parse mode enabled.
+// Uses the API limiter to avoid rate limiting.
+func (ctx *MsgContext) NewDraftMarkdown() *Draft {
+	return ctx.newDraft(tgapi.ParseMDV2)
+}
+
+// Translate looks up a key in the current user's language.
+// Falls back to the bot's default language if user's language is unknown or unsupported.
 func (ctx *MsgContext) Translate(key string) string {
 	if ctx.From == nil {
 		return key
@@ -229,3 +450,9 @@ func (ctx *MsgContext) Translate(key string) string {
 	lang := Val(ctx.From.LanguageCode, ctx.l10n.GetFallbackLanguage())
 	return ctx.l10n.Translate(lang, key)
 }
+
+// NewInlineKeyboard creates a new keyboard builder with the context's payload
+// encoding type and the specified maximum number of buttons per row.
+func (ctx *MsgContext) NewInlineKeyboard(maxRow int) *InlineKeyboard {
+	return NewInlineKeyboard(ctx.payloadType, maxRow)
+}

plugins.go

@@ -7,83 +7,139 @@ import (
 	"git.nix13.pw/scuroneko/extypes"
 )
 
-const (
-	CommandValueStringType CommandValueType = "string"
-	CommandValueIntType    CommandValueType = "int"
-	CommandValueBoolType   CommandValueType = "bool"
-	CommandValueAnyType    CommandValueType = "any"
-)
-
-var (
-	CommandRegexInt    = regexp.MustCompile("\\d+")
-	CommandRegexString = regexp.MustCompile(".+")
-)
-
-var (
-	ErrCmdArgCountMismatch  = errors.New("command arg count mismatch")
-	ErrCmdArgRegexpMismatch = errors.New("command arg regexp mismatch")
-)
-
+// CommandValueType defines the expected type of a command argument.
 type CommandValueType string
+
+const (
+	// CommandValueStringType expects any non-empty string.
+	CommandValueStringType CommandValueType = "string"
+	// CommandValueIntType expects a decimal integer (digits only).
+	CommandValueIntType CommandValueType = "int"
+	// CommandValueBoolType is reserved for future use (not implemented).
+	CommandValueBoolType CommandValueType = "bool"
+	// CommandValueAnyType accepts any input without validation.
+	CommandValueAnyType CommandValueType = "any"
+)
+
+var (
+	// CommandRegexInt matches one or more digits.
+	CommandRegexInt = regexp.MustCompile(`\d+`)
+	// CommandRegexString matches any non-empty string.
+	CommandRegexString = regexp.MustCompile(`.+`)
+	// CommandRegexBool matches true or false.
+	CommandRegexBool = regexp.MustCompile(`true|false`)
+)
+
+// ErrCmdArgCountMismatch is returned when the number of provided arguments
+// is less than the number of required arguments.
+var ErrCmdArgCountMismatch = errors.New("command arg count mismatch")
+
+// ErrCmdArgRegexpMismatch is returned when an argument fails regex validation.
+var ErrCmdArgRegexpMismatch = errors.New("command arg regexp mismatch")
+
+// CommandArg defines a single argument for a command, including type, regex,
+// and whether it is required.
 type CommandArg struct {
-	valueType CommandValueType
-	text      string
-	regex     *regexp.Regexp
-	required  bool
+	valueType CommandValueType // Type of expected value
+	text      string           // Human-readable description (not used in validation)
+	regex     *regexp.Regexp   // Regex used to validate input
+	required  bool             // Whether this argument must be provided
 }
 
-func NewCommandArg(text string, valueType CommandValueType) *CommandArg {
+// NewCommandArg creates a new CommandArg with the given text and type.
+// Uses a default regex based on the type (string or int).
+// For CommandValueAnyType, no validation is performed.
+func NewCommandArg(text string) *CommandArg {
+	return &CommandArg{CommandValueAnyType, text, CommandRegexString, false}
+}
+
+// SetValueType sets expected value type and switches built-in validation regexp.
+func (c *CommandArg) SetValueType(t CommandValueType) *CommandArg {
 	regex := CommandRegexString
-	switch valueType {
+	switch t {
 	case CommandValueIntType:
 		regex = CommandRegexInt
+	case CommandValueBoolType:
+		regex = CommandRegexBool
+	case CommandValueAnyType:
+		regex = nil // Skip validation
 	}
-	return &CommandArg{valueType, text, regex, false}
+	c.regex = regex
+	return c
 }
+
+// SetRequired marks this argument as required.
+// Returns the receiver for method chaining.
 func (c *CommandArg) SetRequired() *CommandArg {
 	c.required = true
 	return c
 }
 
+// CommandExecutor is the function type that executes a command.
+// It receives the message context and a database context (generic).
 type CommandExecutor[T DbContext] func(ctx *MsgContext, dbContext *T)
 
+// Command represents a bot command with arguments, description, and executor.
+// Can be registered in a Plugin and optionally skipped from auto-generation.
 type Command[T DbContext] struct {
-	command     string
-	description string
-	exec        CommandExecutor[T]
-	args        extypes.Slice[CommandArg]
-	middlewares extypes.Slice[Middleware[T]]
-	skipAutoCmd bool
+	command     string                       // The command trigger (e.g., "/start")
+	description string                       // Human-readable description for help
+	exec        CommandExecutor[T]           // Function to execute when command is triggered
+	args        extypes.Slice[CommandArg]    // List of expected arguments
+	middlewares extypes.Slice[Middleware[T]] // Optional middleware chain
+	skipAutoCmd bool                         // If true, this command won't be auto-added to help menus
 }
 
+// NewCommand creates a new Command with the given executor, command string, and arguments.
+// The command string should not include the leading slash (e.g., "start", not "/start").
 func NewCommand[T any](exec CommandExecutor[T], command string, args ...CommandArg) *Command[T] {
 	return &Command[T]{command, "", exec, args, make(extypes.Slice[Middleware[T]], 0), false}
 }
+
+// NewPayload creates a new Command with the given executor, command payload string, and arguments.
+// The command string can contain any symbols, but it is recommended to use only "_", "-", ".", a-z, A-Z, and 0-9.
+func NewPayload[T any](exec CommandExecutor[T], command string, args ...CommandArg) *Command[T] {
+	return &Command[T]{command, "", exec, args, make(extypes.Slice[Middleware[T]], 0), false}
+}
+
+// Use adds a middleware to the command's execution chain.
+// Middlewares are executed in the order they are added.
 func (c *Command[T]) Use(m Middleware[T]) *Command[T] {
 	c.middlewares = c.middlewares.Push(m)
 	return c
 }
+
+// SetDescription sets the human-readable description of the command.
 func (c *Command[T]) SetDescription(desc string) *Command[T] {
 	c.description = desc
 	return c
 }
+
+// SkipCommandAutoGen marks this command to be excluded from auto-generated help menus.
 func (c *Command[T]) SkipCommandAutoGen() *Command[T] {
 	c.skipAutoCmd = true
 	return c
 }
+
+// validateArgs checks if the provided arguments match the command's requirements.
+// Returns ErrCmdArgCountMismatch if too few arguments are provided.
+// Returns ErrCmdArgRegexpMismatch if any argument fails regex validation.
 func (c *Command[T]) validateArgs(args []string) error {
-	cmdArgs := c.args.Filter(func(e CommandArg) bool { return !e.required })
-	if len(args) < cmdArgs.Len() {
+	// Count required args
+	requiredCount := c.args.Filter(func(a CommandArg) bool { return a.required }).Len()
+	if len(args) < requiredCount {
 		return ErrCmdArgCountMismatch
 	}
 
+	// Validate each argument against its regex
 	for i, arg := range args {
 		if i >= c.args.Len() {
+			// Extra arguments beyond defined args are ignored
 			break
 		}
 		cmdArg := c.args.Get(i)
 		if cmdArg.regex == nil {
-			continue
+			continue // Skip validation for CommandValueAnyType
 		}
 		if !cmdArg.regex.MatchString(arg) {
 			return ErrCmdArgRegexpMismatch
@@ -92,57 +148,121 @@ func (c *Command[T]) validateArgs(args []string) error {
 	return nil
 }
 
+// Plugin represents a collection of commands and payloads (e.g., callback handlers),
+// with shared middleware and configuration.
 type Plugin[T DbContext] struct {
-	name        string
-	commands    map[string]Command[T]
-	payloads    map[string]Command[T]
-	middlewares extypes.Slice[Middleware[T]]
-	skipAutoCmd bool
+	name        string                       // Name of the plugin (e.g., "admin", "user")
+	commands    map[string]*Command[T]       // Registered commands (triggered by message)
+	payloads    map[string]*Command[T]       // Registered payloads (triggered by callback data)
+	middlewares extypes.Slice[Middleware[T]] // Shared middlewares for all commands/payloads
+	skipAutoCmd bool                         // If true, all commands in this plugin are excluded from auto-help
 }
 
+// NewPlugin creates a new Plugin with the given name.
 func NewPlugin[T DbContext](name string) *Plugin[T] {
 	return &Plugin[T]{
-		name, map[string]Command[T]{},
-		map[string]Command[T]{}, extypes.Slice[Middleware[T]]{}, false,
+		name, make(map[string]*Command[T]),
+		make(map[string]*Command[T]), extypes.Slice[Middleware[T]]{}, false,
 	}
 }
 
+// AddCommand registers a command in the plugin.
+// The command's .command field is used as the key.
 func (p *Plugin[T]) AddCommand(command *Command[T]) *Plugin[T] {
-	p.commands[command.command] = *command
+	p.commands[command.command] = command
 	return p
 }
+
+// NewCommand creates and immediately adds a new command to the plugin.
+// Returns the created command for further configuration.
 func (p *Plugin[T]) NewCommand(exec CommandExecutor[T], command string, args ...CommandArg) *Command[T] {
-	return NewCommand(exec, command, args...)
+	cmd := NewCommand(exec, command, args...)
+	p.AddCommand(cmd)
+	return cmd
 }
+
+// AddPayload registers a payload (e.g., callback query data) in the plugin.
+// Payloads are triggered by inline button callback_data, not by message text.
 func (p *Plugin[T]) AddPayload(command *Command[T]) *Plugin[T] {
-	p.payloads[command.command] = *command
+	p.payloads[command.command] = command
 	return p
 }
+
+// NewPayload creates and immediately adds a new payload command to the plugin.
+// Returns the created payload command for further configuration.
+func (p *Plugin[T]) NewPayload(exec CommandExecutor[T], command string, args ...CommandArg) *Command[T] {
+	cmd := NewPayload(exec, command, args...)
+	p.AddPayload(cmd)
+	return cmd
+}
+
+// AddMiddleware adds a middleware to the plugin's global middleware chain.
+// Middlewares are executed before any command or payload.
 func (p *Plugin[T]) AddMiddleware(middleware Middleware[T]) *Plugin[T] {
 	p.middlewares = p.middlewares.Push(middleware)
 	return p
 }
+
+// SkipCommandAutoGen marks the entire plugin to be excluded from auto-generated help menus.
 func (p *Plugin[T]) SkipCommandAutoGen() *Plugin[T] {
 	p.skipAutoCmd = true
 	return p
 }
 
+// executeCmd finds and executes a command by its trigger string.
+// Validates arguments and runs middlewares before executor.
+// On error, sends an error message to the user via ctx.error().
 func (p *Plugin[T]) executeCmd(cmd string, ctx *MsgContext, dbContext *T) {
-	command := p.commands[cmd]
+	command, exists := p.commands[cmd]
+	if !exists {
+		ctx.error(errors.New("command not found"))
+		return
+	}
+
 	if err := command.validateArgs(ctx.Args); err != nil {
 		ctx.error(err)
 		return
 	}
+
+	// Run command-specific middlewares
+	for _, m := range command.middlewares {
+		if !m.Execute(ctx, dbContext) {
+			return
+		}
+	}
+
+	// Execute command
 	command.exec(ctx, dbContext)
 }
+
+// executePayload finds and executes a payload by its callback_data string.
+// Validates arguments and runs middlewares before executor.
+// On error, sends an error message to the user via ctx.error().
 func (p *Plugin[T]) executePayload(payload string, ctx *MsgContext, dbContext *T) {
-	pl := p.payloads[payload]
-	if err := pl.validateArgs(ctx.Args); err != nil {
+	command, exists := p.payloads[payload]
+	if !exists {
+		ctx.error(errors.New("payload not found"))
+		return
+	}
+
+	if err := command.validateArgs(ctx.Args); err != nil {
 		ctx.error(err)
 		return
 	}
-	pl.exec(ctx, dbContext)
+
+	// Run command-specific middlewares
+	for _, m := range command.middlewares {
+		if !m.Execute(ctx, dbContext) {
+			return
+		}
+	}
+
+	// Execute payload
+	command.exec(ctx, dbContext)
 }
+
+// executeMiddlewares runs all plugin middlewares in order.
+// Returns false if any middleware returns false (blocks execution).
 func (p *Plugin[T]) executeMiddlewares(ctx *MsgContext, db *T) bool {
 	for _, m := range p.middlewares {
 		if !m.Execute(ctx, db) {
@@ -152,31 +272,47 @@ func (p *Plugin[T]) executeMiddlewares(ctx *MsgContext, db *T) bool {
 	return true
 }
 
+// MiddlewareExecutor is the function type for middleware logic.
+// Returns true to continue execution, false to block it.
+// If async, return value is ignored.
 type MiddlewareExecutor[T DbContext] func(ctx *MsgContext, db *T) bool
 
-// Middleware
-// When async, returned value ignored
+// Middleware represents a reusable execution interceptor.
+// Can be synchronous (blocking) or asynchronous (non-blocking).
 type Middleware[T DbContext] struct {
-	name     string
-	executor MiddlewareExecutor[T]
-	order    int
-	async    bool
+	name     string                // Human-readable name for logging/debugging
+	executor MiddlewareExecutor[T] // Function to execute
+	order    int                   // Optional sort order (not used yet)
+	async    bool                  // If true, runs in goroutine and doesn't block
 }
 
+// NewMiddleware creates a new synchronous middleware.
 func NewMiddleware[T DbContext](name string, executor MiddlewareExecutor[T]) *Middleware[T] {
 	return &Middleware[T]{name, executor, 0, false}
 }
+
+// SetOrder sets the execution order (currently ignored).
 func (m *Middleware[T]) SetOrder(order int) *Middleware[T] {
 	m.order = order
 	return m
 }
+
+// SetAsync marks the middleware to run asynchronously.
+// Execution continues regardless of its return value.
 func (m *Middleware[T]) SetAsync(async bool) *Middleware[T] {
 	m.async = async
 	return m
 }
+
+// Execute runs the middleware.
+// If async, runs in a goroutine and returns true immediately.
+// Otherwise, returns the result of the executor.
 func (m *Middleware[T]) Execute(ctx *MsgContext, db *T) bool {
 	if m.async {
-		go m.executor(ctx, db)
+		ctx := *ctx // copy context to avoid race condition
+		go func(ctx MsgContext) {
+			m.executor(&ctx, db)
+		}(ctx)
 		return true
 	}
 	return m.executor(ctx, db)

runners.go

@@ -1,55 +1,119 @@
 package laniakea
 
 import (
+	"context"
 	"time"
 )
 
+// RunnerFn is the function type for a runner. It receives a pointer to
+// the Bot and returns an error if execution fails.
 type RunnerFn[T DbContext] func(*Bot[T]) error
+
+// Runner represents a configurable background or one-time task to be
+// executed by a Bot.
+//
+// Runners are configured using builder methods: Onetime(), Async(), Timeout().
+// Once Execute() is called, the Runner should not be modified.
+//
+// Execution semantics:
+//   - onetime=true, async=false: Run once synchronously (blocks).
+//   - onetime=true, async=true:  Run once in a goroutine (non-blocking).
+//   - onetime=false, async=true: Run repeatedly in a goroutine with timeout.
+//   - onetime=false, async=false: Invalid configuration — ignored with warning.
 type Runner[T DbContext] struct {
-	name    string
-	onetime bool
-	async   bool
-	timeout time.Duration
-	fn      RunnerFn[T]
+	name    string        // Human-readable name for logging
+	onetime bool          // If true, runs once; if false, runs periodically
+	async   bool          // If true, runs in a goroutine; else, runs synchronously
+	timeout time.Duration // Duration to wait between periodic executions (ignored if onetime=true)
+	fn      RunnerFn[T]   // The function to execute
 }
 
+// NewRunner creates a new Runner with the given name and function.
+// By default, the Runner is configured as async=true (non-blocking).
+//
+// Builder methods (Onetime, Async, Timeout) can be chained to customize behavior.
+// DO NOT call builder methods concurrently or after Execute().
 func NewRunner[T DbContext](name string, fn RunnerFn[T]) *Runner[T] {
 	return &Runner[T]{
-		name: name, fn: fn, async: true,
+		name:    name,
+		fn:      fn,
+		async:   true, // Default: run asynchronously
+		timeout: 0,    // Default: no timeout (ignored if onetime=true)
 	}
 }
-func (b *Runner[T]) Onetime(onetime bool) *Runner[T] {
-	b.onetime = onetime
-	return b
-}
-func (b *Runner[T]) Async(async bool) *Runner[T] {
-	b.async = async
-	return b
-}
-func (b *Runner[T]) Timeout(timeout time.Duration) *Runner[T] {
-	b.timeout = timeout
-	return b
+
+// Onetime sets whether the runner executes once or repeatedly.
+// If true, the runner runs only once.
+// If false, the runner runs in a loop with the configured timeout.
+func (r *Runner[T]) Onetime(onetime bool) *Runner[T] {
+	r.onetime = onetime
+	return r
 }
 
-func (bot *Bot[T]) ExecRunners() {
+// Async sets whether the runner executes synchronously or asynchronously.
+// If true, the runner runs in a goroutine (non-blocking).
+// If false, the runner blocks the caller during execution.
+//
+// Note: If onetime=false and async=false, the runner will be skipped with a warning.
+func (r *Runner[T]) Async(async bool) *Runner[T] {
+	r.async = async
+	return r
+}
+
+// Timeout sets the duration to wait between repeated executions for
+// non-onetime runners.
+//
+// If onetime=true, this value is ignored.
+// If onetime=false and async=true, this timeout determines the sleep interval
+// between loop iterations.
+//
+// A zero value (time.Duration(0)) is allowed but may trigger a warning
+// if used with a background (non-onetime) async runner.
+func (r *Runner[T]) Timeout(timeout time.Duration) *Runner[T] {
+	r.timeout = timeout
+	return r
+}
+
+// ExecRunners executes all runners registered on the Bot with context-based lifecycle management.
+//
+// It logs warnings for misconfigured runners:
+//   - Sync, non-onetime runners are skipped (invalid configuration).
+//   - Background (non-onetime, async) runners without a timeout trigger a warning.
+//
+// Execution logic:
+//   - onetime + async: Runs once in a goroutine.
+//   - onetime + sync:  Runs once synchronously; warns if slower than 2 seconds.
+//   - !onetime + async: Runs in a loop with timeout between iterations until ctx.Done().
+//   - !onetime + sync: Skipped with warning.
+//
+// Background runners listen for ctx.Done() and gracefully shut down when the context is canceled.
+//
+// This method is typically called once during bot startup in RunWithContext.
+func (bot *Bot[T]) ExecRunners(ctx context.Context) {
 	bot.logger.Infoln("Executing runners...")
 	for _, runner := range bot.runners {
+		// Validate configuration
 		if !runner.onetime && !runner.async {
-			bot.logger.Warnf("Runner %s not onetime, but sync\n", runner.name)
+			bot.logger.Warnf("Runner %s not onetime, but sync — skipping\n", runner.name)
 			continue
 		}
-		if !runner.onetime && runner.async && runner.timeout == (time.Second*0) {
-			bot.logger.Warnf("Background runner \"%s\" should have timeout", runner.name)
+		if !runner.onetime && runner.async && runner.timeout == 0 {
+			bot.logger.Warnf("Background runner \"%s\" has no timeout — skipping\n", runner.name)
+			continue
 		}
 
-		if runner.async && runner.onetime {
-			go func() {
-				err := runner.fn(bot)
+		if runner.onetime && runner.async {
+			// One-time async: fire and forget
+			bot.runnerOnceWG.Add(1)
+			go func(r Runner[T]) {
+				defer bot.runnerOnceWG.Done()
+				err := r.fn(bot)
 				if err != nil {
-					bot.logger.Warnf("Runner %s failed: %s\n", runner.name, err)
+					bot.logger.Warnf("Runner %s failed: %s\n", r.name, err)
 				}
-			}()
-		} else if !runner.async && runner.onetime {
+			}(runner)
+		} else if runner.onetime && !runner.async {
+			// One-time sync: block until done
 			t := time.Now()
 			err := runner.fn(bot)
 			if err != nil {
@@ -57,18 +121,28 @@ func (bot *Bot[T]) ExecRunners() {
 			}
 			elapsed := time.Since(t)
 			if elapsed > time.Second*2 {
-				bot.logger.Warnf("Runner %s too slow. Elapsed time %s>=2s", runner.name, elapsed)
+				bot.logger.Warnf("Runner %s too slow. Elapsed time %v >= 2s\n", runner.name, elapsed)
 			}
-		} else if !runner.onetime {
-			go func() {
+		} else if !runner.onetime && runner.async {
+			// Background loop: periodic execution with graceful shutdown
+			bot.runnerBgWG.Add(1)
+			go func(r Runner[T]) {
+				defer bot.runnerBgWG.Done()
+				ticker := time.NewTicker(r.timeout)
+				defer ticker.Stop()
 				for {
-					err := runner.fn(bot)
-					if err != nil {
-						bot.logger.Warnf("Runner %s failed: %s\n", runner.name, err)
+					select {
+					case <-ctx.Done():
+						return
+					case <-ticker.C:
+						err := r.fn(bot)
+						if err != nil {
+							bot.logger.Warnf("Runner %s failed: %s\n", r.name, err)
+						}
 					}
-					time.Sleep(runner.timeout)
 				}
-			}()
+			}(runner)
 		}
+		// Note: !onetime && !async is already skipped above
 	}
 }

tgapi/api.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -12,49 +11,77 @@ import (
 
 	"git.nix13.pw/scuroneko/laniakea/utils"
 	"git.nix13.pw/scuroneko/slog"
-	"golang.org/x/time/rate"
 )
 
+// APIOpts holds configuration options for initializing the Telegram API client.
+// Use the provided setter methods to build options — do not construct directly.
 type APIOpts struct {
 	token         string
 	client        *http.Client
 	useTestServer bool
 	apiUrl        string
 
-	limiter           *rate.Limiter
+	limiter           *utils.RateLimiter
 	dropOverflowLimit bool
 }
 
-var ErrPoolUnexpected = errors.New("unexpected response from pool")
-
+// NewAPIOpts creates a new APIOpts with default values.
+// Use setter methods to customize behavior.
 func NewAPIOpts(token string) *APIOpts {
-	return &APIOpts{token: token, client: nil, useTestServer: false, apiUrl: "https://api.telegram.org"}
+	return &APIOpts{
+		token:         token,
+		client:        nil,
+		useTestServer: false,
+		apiUrl:        "https://api.telegram.org",
+	}
 }
+
+// SetHTTPClient sets a custom HTTP client. Use this for timeouts, proxies, or custom transport.
+// If not set, a default client with 45s timeout is used.
 func (opts *APIOpts) SetHTTPClient(client *http.Client) *APIOpts {
 	if client != nil {
 		opts.client = client
 	}
 	return opts
 }
+
+// UseTestServer enables use of Telegram's test server (https://api.test.telegram.org).
+// Only for development/testing.
 func (opts *APIOpts) UseTestServer(use bool) *APIOpts {
 	opts.useTestServer = use
 	return opts
 }
+
+// SetAPIUrl overrides the default Telegram API URL.
+// Useful for self-hosted bots or proxies.
 func (opts *APIOpts) SetAPIUrl(apiUrl string) *APIOpts {
 	if apiUrl != "" {
 		opts.apiUrl = apiUrl
 	}
 	return opts
 }
-func (opts *APIOpts) SetLimiter(limiter *rate.Limiter) *APIOpts {
+
+// SetLimiter sets a rate limiter to enforce Telegram's API limits.
+// Recommended: use utils.NewRateLimiter() for correct per-chat and global throttling.
+func (opts *APIOpts) SetLimiter(limiter *utils.RateLimiter) *APIOpts {
 	opts.limiter = limiter
 	return opts
 }
+
+// SetLimiterDrop enables "drop mode" for rate limiting.
+// If true, requests exceeding limits return ErrDropOverflow immediately.
+// If false, requests block until capacity is available.
 func (opts *APIOpts) SetLimiterDrop(b bool) *APIOpts {
 	opts.dropOverflowLimit = b
 	return opts
 }
 
+// API is the main Telegram Bot API client for JSON requests.
+//
+// Use API methods when sending JSON payloads (for example with file_id, URL, or other
+// non-multipart fields). For multipart file uploads, use Uploader.
+//
+// It manages HTTP requests, rate limiting, retries, and connection pooling.
 type API struct {
 	token         string
 	client        *http.Client
@@ -62,101 +89,189 @@ type API struct {
 	useTestServer bool
 	apiUrl        string
 
-	pool              *WorkerPool
-	limiter           *rate.Limiter
+	pool              *workerPool
+	Limiter           *utils.RateLimiter
 	dropOverflowLimit bool
 }
 
+// NewAPI creates a new API client from options.
+// Always call CloseApi() when done to release resources.
 func NewAPI(opts *APIOpts) *API {
 	l := slog.CreateLogger().Level(utils.GetLoggerLevel()).Prefix("API")
 	l.AddWriter(l.CreateJsonStdoutWriter())
+
 	client := opts.client
 	if client == nil {
 		client = &http.Client{Timeout: time.Second * 45}
 	}
-	pool := NewWorkerPool(16, 256)
-	pool.Start(context.Background())
+
+	pool := newWorkerPool(16, 256)
+	pool.start()
+
 	return &API{
-		opts.token, client, l,
-		opts.useTestServer, opts.apiUrl,
-		pool, opts.limiter, opts.dropOverflowLimit,
+		token:             opts.token,
+		client:            client,
+		logger:            l,
+		useTestServer:     opts.useTestServer,
+		apiUrl:            opts.apiUrl,
+		pool:              pool,
+		Limiter:           opts.limiter,
+		dropOverflowLimit: opts.dropOverflowLimit,
 	}
 }
+
+// CloseApi shuts down the internal worker pool and closes the logger.
+// Must be called to avoid resource leaks.
+// See https://core.telegram.org/bots/api
 func (api *API) CloseApi() error {
-	api.pool.Stop()
+	api.pool.stop()
 	return api.logger.Close()
 }
-func (api *API) GetLogger() *slog.Logger { return api.logger }
 
-type ApiResponse[R any] struct {
-	Ok          bool   `json:"ok"`
-	Description string `json:"description,omitempty"`
-	Result      R      `json:"result,omitempty"`
-	ErrorCode   int    `json:"error_code,omitempty"`
+// GetLogger returns the internal logger for custom logging.
+// See https://core.telegram.org/bots/api
+func (api *API) GetLogger() *slog.Logger {
+	return api.logger
 }
+
+// ResponseParameters contains Telegram API response metadata (e.g., retry_after, migrate_to_chat_id).
+type ResponseParameters struct {
+	MigrateToChatID *int64 `json:"migrate_to_chat_id,omitempty"`
+	RetryAfter      *int   `json:"retry_after,omitempty"`
+}
+
+// ApiResponse is the standard Telegram Bot API response structure.
+// Generic over Result type R.
+type ApiResponse[R any] struct {
+	Ok          bool                `json:"ok"`
+	Description string              `json:"description,omitempty"`
+	Result      R                   `json:"result,omitempty"`
+	ErrorCode   int                 `json:"error_code,omitempty"`
+	Parameters  *ResponseParameters `json:"parameters,omitempty"`
+}
+
+// TelegramRequest is an internal helper struct.
+// DO NOT USE NewRequest or NewRequestWithChatID — they are unsafe and discouraged.
+// Instead, use explicit methods like SendMessage, GetUpdates, etc.
+//
+// Why? Because using generics with arbitrary types P and R leads to:
+//   - No compile-time validation of parameters
+//   - No IDE autocompletion
+//   - Runtime panics on malformed JSON
+//   - Hard-to-debug errors
+//
+// Recommended: Define specific methods for each Telegram method (see below).
 type TelegramRequest[R, P any] struct {
 	method string
 	params P
+	chatId int64
 }
 
+// NewRequest creates an untyped TelegramRequest for the given method and params with no chat ID.
 func NewRequest[R, P any](method string, params P) TelegramRequest[R, P] {
-	return TelegramRequest[R, P]{method: method, params: params}
+	return TelegramRequest[R, P]{method, params, 0}
 }
+
+// NewRequestWithChatID creates an untyped TelegramRequest with an associated chat ID.
+// The chat ID is used for per-chat rate limiting.
+func NewRequestWithChatID[R, P any](method string, params P, chatId int64) TelegramRequest[R, P] {
+	return TelegramRequest[R, P]{method, params, chatId}
+}
+
+// doRequest performs a single HTTP request to Telegram API.
+// Handles rate limiting, retries on 429, and parses responses.
+// Must be called within a worker pool context if using DoWithContext.
 func (r TelegramRequest[R, P]) doRequest(ctx context.Context, api *API) (R, error) {
 	var zero R
-	if api.limiter != nil {
-		if api.dropOverflowLimit {
-			if !api.limiter.Allow() {
-				return zero, errors.New("rate limited")
-			}
-		} else {
-			if err := api.limiter.Wait(ctx); err != nil {
-				return zero, err
-			}
-		}
-	}
-
-	data, err := json.Marshal(r.params)
+	reqData, err := json.Marshal(r.params)
 	if err != nil {
-		return zero, err
+		return zero, fmt.Errorf("failed to marshal request: %w", err)
 	}
-	buf := bytes.NewBuffer(data)
 
 	methodPrefix := ""
 	if api.useTestServer {
 		methodPrefix = "/test"
 	}
 	url := fmt.Sprintf("%s/bot%s%s/%s", api.apiUrl, api.token, methodPrefix, r.method)
-	req, err := http.NewRequestWithContext(ctx, "POST", url, buf)
+
+	req, err := http.NewRequestWithContext(ctx, "POST", url, nil)
 	if err != nil {
-		return zero, err
+		return zero, fmt.Errorf("failed to create request: %w", err)
 	}
+
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("User-Agent", fmt.Sprintf("Laniakea/%s", utils.VersionString))
+	req.Header.Set("Accept-Encoding", "gzip")
 
-	api.logger.Debugln("REQ", api.apiUrl, r.method, buf.String())
-	res, err := api.client.Do(req)
-	if err != nil {
-		return zero, err
-	}
-	defer func(Body io.ReadCloser) {
-		_ = Body.Close()
-	}(res.Body)
+	for {
+		// Apply rate limiting before making the request
+		if api.Limiter != nil {
+			if err := api.Limiter.Check(ctx, api.dropOverflowLimit, r.chatId); err != nil {
+				return zero, err
+			}
+		}
+		buf := bytes.NewBuffer(reqData)
+		req.Body = io.NopCloser(buf)
+		req.ContentLength = int64(len(reqData))
 
-	data, err = readBody(res.Body)
-	if err != nil {
-		return zero, err
+		api.logger.Debugln("REQ", url, string(reqData))
+		resp, err := api.client.Do(req)
+		if err != nil {
+			return zero, fmt.Errorf("HTTP request failed: %w", err)
+		}
+
+		respData, err := readBody(resp.Body)
+		_ = resp.Body.Close() // ensure body is closed
+		if err != nil {
+			return zero, fmt.Errorf("failed to read response body: %w", err)
+		}
+
+		api.logger.Debugln("RES", r.method, string(respData))
+
+		response, err := parseBody[R](respData)
+		if err != nil {
+			return zero, fmt.Errorf("failed to parse response: %w", err)
+		}
+
+		if !response.Ok {
+			// Handle rate limiting (429)
+			if response.ErrorCode == 429 && response.Parameters != nil && response.Parameters.RetryAfter != nil {
+				after := *response.Parameters.RetryAfter
+				api.logger.Warnf("Rate limited by Telegram, retry after %d seconds (chat: %d)", after, r.chatId)
+
+				// Apply cooldown to global or chat-specific limiter
+				if api.Limiter != nil {
+					if r.chatId > 0 {
+						api.Limiter.SetChatLock(r.chatId, after)
+					} else {
+						api.Limiter.SetGlobalLock(after)
+					}
+				}
+
+				// Wait and retry
+				select {
+				case <-ctx.Done():
+					return zero, ctx.Err()
+				case <-time.After(time.Duration(after) * time.Second):
+					continue // retry request
+				}
+			}
+
+			// Other API errors
+			return zero, fmt.Errorf("[%d] %s", response.ErrorCode, response.Description)
+		}
+
+		return response.Result, nil
 	}
-	api.logger.Debugln("RES", r.method, string(data))
-	if res.StatusCode != http.StatusOK {
-		return zero, fmt.Errorf("unexpected status code: %d, %s", res.StatusCode, string(data))
-	}
-	return parseBody[R](data)
 }
+
+// DoWithContext executes the request asynchronously via the worker pool.
+// Returns result or error via channel. Respects context cancellation.
 func (r TelegramRequest[R, P]) DoWithContext(ctx context.Context, api *API) (R, error) {
 	var zero R
-	result, err := api.pool.Submit(ctx, func(ctx context.Context) (any, error) {
+
+	resultChan, err := api.pool.submit(ctx, func(ctx context.Context) (any, error) {
 		return r.doRequest(ctx, api)
 	})
 	if err != nil {
@@ -166,33 +281,37 @@ func (r TelegramRequest[R, P]) DoWithContext(ctx context.Context, api *API) (R,
 	select {
 	case <-ctx.Done():
 		return zero, ctx.Err()
-	case res := <-result:
-		if res.Err != nil {
-			return zero, res.Err
+	case res := <-resultChan:
+		if res.err != nil {
+			return zero, res.err
 		}
-		if val, ok := res.Value.(R); ok {
+		if val, ok := res.value.(R); ok {
 			return val, nil
 		}
 		return zero, ErrPoolUnexpected
 	}
 }
+
+// Do executes the request synchronously with a background context.
+// Use only for simple, non-critical calls.
 func (r TelegramRequest[R, P]) Do(api *API) (R, error) {
 	return r.DoWithContext(context.Background(), api)
 }
 
+// readBody reads and limits response body to prevent memory exhaustion.
+// Telegram responses are typically small (<1MB), but we cap at 10MB.
 func readBody(body io.ReadCloser) ([]byte, error) {
-	reader := io.LimitReader(body, 10<<20)
+	reader := io.LimitReader(body, 10<<20) // 10 MB
 	return io.ReadAll(reader)
 }
-func parseBody[R any](data []byte) (R, error) {
-	var zero R
+
+// parseBody unmarshals a Telegram API response into a typed ApiResponse.
+// Only returns an error on malformed JSON; non-OK responses are left for the caller to handle.
+func parseBody[R any](data []byte) (ApiResponse[R], error) {
 	var resp ApiResponse[R]
 	err := json.Unmarshal(data, &resp)
 	if err != nil {
-		return zero, err
+		return resp, fmt.Errorf("failed to unmarshal JSON: %w", err)
 	}
-	if !resp.Ok {
-		return zero, fmt.Errorf("[%d] %s", resp.ErrorCode, resp.Description)
-	}
-	return resp.Result, nil
+	return resp, nil
 }

tgapi/attachments_methods.go

@@ -1,8 +1,10 @@
 package tgapi
 
+// SendPhotoP holds parameters for the sendPhoto method.
+// See https://core.telegram.org/bots/api#sendphoto
 type SendPhotoP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -13,7 +15,7 @@ type SendPhotoP struct {
 
 	ShowCaptionAboveMedia bool   `json:"show_caption_above_media,omitempty"`
 	HasSpoiler            bool   `json:"has_spoiler,omitempty"`
-	DisableNotifications  bool   `json:"disable_notifications,omitempty"`
+	DisableNotifications  bool   `json:"disable_notification,omitempty"`
 	ProtectContent        bool   `json:"protect_content,omitempty"`
 	AllowPaidBroadcast    bool   `json:"allow_paid_broadcast,omitempty"`
 	MessageEffectID       string `json:"message_effect_id,omitempty"`
@@ -23,14 +25,18 @@ type SendPhotoP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendPhoto sends a photo.
+// See https://core.telegram.org/bots/api#sendphoto
 func (api *API) SendPhoto(params SendPhotoP) (Message, error) {
-	req := NewRequest[Message]("sendPhoto", params)
+	req := NewRequestWithChatID[Message]("sendPhoto", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendAudioP holds parameters for the sendAudio method.
+// See https://core.telegram.org/bots/api#sendaudio
 type SendAudioP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -52,14 +58,18 @@ type SendAudioP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendAudio sends an audio file.
+// See https://core.telegram.org/bots/api#sendaudio
 func (api *API) SendAudio(params SendAudioP) (Message, error) {
-	req := NewRequest[Message]("sendAudio", params)
+	req := NewRequestWithChatID[Message]("sendAudio", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendDocumentP holds parameters for the sendDocument method.
+// See https://core.telegram.org/bots/api#senddocument
 type SendDocumentP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -78,14 +88,18 @@ type SendDocumentP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendDocument sends a document.
+// See https://core.telegram.org/bots/api#senddocument
 func (api *API) SendDocument(params SendDocumentP) (Message, error) {
-	req := NewRequest[Message]("sendDocument", params)
+	req := NewRequestWithChatID[Message]("sendDocument", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendVideoP holds parameters for the sendVideo method.
+// See https://core.telegram.org/bots/api#sendvideo
 type SendVideoP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -93,7 +107,7 @@ type SendVideoP struct {
 	Duration int    `json:"duration,omitempty"`
 	Width    int    `json:"width,omitempty"`
 	Height   int    `json:"height,omitempty"`
-	Cover    int    `json:"cover,omitempty"`
+	Cover    string `json:"cover,omitempty"`
 
 	StartTimestamp  int             `json:"start_timestamp,omitempty"`
 	Caption         string          `json:"caption,omitempty"`
@@ -113,14 +127,18 @@ type SendVideoP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendVideo sends a video.
+// See https://core.telegram.org/bots/api#sendvideo
 func (api *API) SendVideo(params SendVideoP) (Message, error) {
-	req := NewRequest[Message]("sendVideo", params)
+	req := NewRequestWithChatID[Message]("sendVideo", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendAnimationP holds parameters for the sendAnimation method.
+// See https://core.telegram.org/bots/api#sendanimation
 type SendAnimationP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -144,14 +162,18 @@ type SendAnimationP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendAnimation sends an animation file (GIF or H.264/MPEG-4 AVC video without sound).
+// See https://core.telegram.org/bots/api#sendanimation
 func (api *API) SendAnimation(params SendAnimationP) (Message, error) {
-	req := NewRequest[Message]("sendAnimation", params)
+	req := NewRequestWithChatID[Message]("sendAnimation", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendVoiceP holds parameters for the sendVoice method.
+// See https://core.telegram.org/bots/api#sendvoice
 type SendVoiceP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -170,14 +192,18 @@ type SendVoiceP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendVoice sends a voice note.
+// See https://core.telegram.org/bots/api#sendvoice
 func (api *API) SendVoice(params *SendVoiceP) (Message, error) {
-	req := NewRequest[Message]("sendVoice", params)
+	req := NewRequestWithChatID[Message]("sendVoice", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendVideoNoteP holds parameters for the sendVideoNote method.
+// See https://core.telegram.org/bots/api#sendvideonote
 type SendVideoNoteP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -194,14 +220,18 @@ type SendVideoNoteP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendVideoNote sends a video note (rounded video message).
+// See https://core.telegram.org/bots/api#sendvideonote
 func (api *API) SendVideoNote(params SendVideoNoteP) (Message, error) {
-	req := NewRequest[Message]("sendVideoNote", params)
+	req := NewRequestWithChatID[Message]("sendVideoNote", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendPaidMediaP holds parameters for the sendPaidMedia method.
+// See https://core.telegram.org/bots/api#sendpaidmedia
 type SendPaidMediaP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 	StarCount             int    `json:"star_count,omitempty"`
@@ -221,14 +251,18 @@ type SendPaidMediaP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendPaidMedia sends paid media.
+// See https://core.telegram.org/bots/api#sendpaidmedia
 func (api *API) SendPaidMedia(params SendPaidMediaP) (Message, error) {
-	req := NewRequest[Message]("sendPaidMedia", params)
+	req := NewRequestWithChatID[Message]("sendPaidMedia", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendMediaGroupP holds parameters for the sendMediaGroup method.
+// See https://core.telegram.org/bots/api#sendmediagroup
 type SendMediaGroupP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -240,7 +274,9 @@ type SendMediaGroupP struct {
 	ReplyParameters     *ReplyParameters `json:"reply_parameters,omitempty"`
 }
 
-func (api *API) SendMediaGroup(params SendMediaGroupP) (Message, error) {
-	req := NewRequest[Message]("sendMediaGroup", params)
+// SendMediaGroup sends a group of photos, videos, documents or audios as an album.
+// See https://core.telegram.org/bots/api#sendmediagroup
+func (api *API) SendMediaGroup(params SendMediaGroupP) ([]Message, error) {
+	req := NewRequestWithChatID[[]Message]("sendMediaGroup", params, params.ChatID)
 	return req.Do(api)
 }

tgapi/attachments_types.go

@@ -1,5 +1,23 @@
 package tgapi
 
+// InputMediaType represents the type of input media.
+type InputMediaType string
+
+const (
+	// InputMediaTypeAnimation is a GIF or H.264/MPEG-4 AVC video without sound.
+	InputMediaTypeAnimation InputMediaType = "animation"
+	// InputMediaTypeDocument is a general file.
+	InputMediaTypeDocument InputMediaType = "document"
+	// InputMediaTypePhoto is a photo.
+	InputMediaTypePhoto InputMediaType = "photo"
+	// InputMediaTypeVideo is a video.
+	InputMediaTypeVideo InputMediaType = "video"
+	// InputMediaTypeAudio is an audio file.
+	InputMediaTypeAudio InputMediaType = "audio"
+)
+
+// InputMedia represents the content of a media message to be sent.
+// It is a union type described in https://core.telegram.org/bots/api#inputmedia.
 type InputMedia struct {
 	Type  InputMediaType `json:"type"`
 	Media string         `json:"media"`
@@ -21,23 +39,18 @@ type InputMedia struct {
 	Title     *string `json:"title,omitempty"`
 }
 
-type InputMediaType string
-
-const (
-	InputMediaTypeAnimation InputMediaType = "animation"
-	InputMediaTypeDocument  InputMediaType = "document"
-	InputMediaTypePhoto     InputMediaType = "photo"
-	InputMediaTypeVideo     InputMediaType = "video"
-	InputMediaTypeAudio     InputMediaType = "audio"
-)
-
+// InputPaidMediaType represents the type of paid media.
 type InputPaidMediaType string
 
 const (
+	// InputPaidMediaTypeVideo represents a paid video.
 	InputPaidMediaTypeVideo InputPaidMediaType = "video"
+	// InputPaidMediaTypePhoto represents a paid photo.
 	InputPaidMediaTypePhoto InputPaidMediaType = "photo"
 )
 
+// InputPaidMedia describes the paid media to be sent.
+// See https://core.telegram.org/bots/api#inputpaidmedia
 type InputPaidMedia struct {
 	Type  InputPaidMediaType `json:"type"`
 	Media string             `json:"media"`
@@ -50,10 +63,12 @@ type InputPaidMedia struct {
 	SupportsStreaming bool   `json:"supports_streaming"`
 }
 
+// PhotoSize represents one size of a photo or a file/sticker thumbnail.
+// See https://core.telegram.org/bots/api#photosize
 type PhotoSize struct {
 	FileID       string `json:"file_id"`
 	FileUniqueID string `json:"file_unique_id"`
 	Width        int    `json:"width"`
 	Height       int    `json:"height"`
-	FileSize     int    `json:"file_size,omitempty"`
+	FileSize     int64  `json:"file_size,omitempty"`
 }

tgapi/bot_methods.go

@@ -1,152 +1,224 @@
 package tgapi
 
+// SetMyCommandsP holds parameters for the setMyCommands method.
+// See https://core.telegram.org/bots/api#setmycommands
 type SetMyCommandsP struct {
 	Commands []BotCommand     `json:"commands"`
 	Scope    *BotCommandScope `json:"scope,omitempty"`
 	Language string           `json:"language_code,omitempty"`
 }
 
+// SetMyCommands changes the list of the bot's commands.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmycommands
 func (api *API) SetMyCommands(params SetMyCommandsP) (bool, error) {
 	req := NewRequest[bool]("setMyCommands", params)
 	return req.Do(api)
 }
 
+// DeleteMyCommandsP holds parameters for the deleteMyCommands method.
+// See https://core.telegram.org/bots/api#deletemycommands
 type DeleteMyCommandsP struct {
 	Scope    *BotCommandScope `json:"scope,omitempty"`
 	Language string           `json:"language_code,omitempty"`
 }
 
+// DeleteMyCommands deletes the list of the bot's commands for the given scope and user language.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#deletemycommands
 func (api *API) DeleteMyCommands(params DeleteMyCommandsP) (bool, error) {
 	req := NewRequest[bool]("deleteMyCommands", params)
 	return req.Do(api)
 }
 
+// GetMyCommands holds parameters for the getMyCommands method.
+// See https://core.telegram.org/bots/api#getmycommands
 type GetMyCommands struct {
 	Scope    *BotCommandScope `json:"scope,omitempty"`
 	Language string           `json:"language_code,omitempty"`
 }
 
+// GetMyCommands returns the current list of the bot's commands for the given scope and user language.
+// See https://core.telegram.org/bots/api#getmycommands
 func (api *API) GetMyCommands(params GetMyCommands) ([]BotCommand, error) {
 	req := NewRequest[[]BotCommand]("getMyCommands", params)
 	return req.Do(api)
 }
 
+// SetMyName holds parameters for the setMyName method.
+// See https://core.telegram.org/bots/api#setmyname
 type SetMyName struct {
 	Name     string `json:"name"`
 	Language string `json:"language_code,omitempty"`
 }
 
+// SetMyName changes the bot's name.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmyname
 func (api *API) SetMyName(params SetMyName) (bool, error) {
 	req := NewRequest[bool]("setMyName", params)
 	return req.Do(api)
 }
 
+// GetMyName holds parameters for the getMyName method.
+// See https://core.telegram.org/bots/api#getmyname
 type GetMyName struct {
 	Language string `json:"language_code,omitempty"`
 }
 
+// GetMyName returns the bot's name for the given language.
+// See https://core.telegram.org/bots/api#getmyname
 func (api *API) GetMyName(params GetMyName) (BotName, error) {
 	req := NewRequest[BotName]("getMyName", params)
 	return req.Do(api)
 }
 
+// SetMyDescription holds parameters for the setMyDescription method.
+// See https://core.telegram.org/bots/api#setmydescription
 type SetMyDescription struct {
 	Description string `json:"description"`
 	Language    string `json:"language_code,omitempty"`
 }
 
+// SetMyDescription changes the bot's description.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmydescription
 func (api *API) SetMyDescription(params SetMyDescription) (bool, error) {
 	req := NewRequest[bool]("setMyDescription", params)
 	return req.Do(api)
 }
 
+// GetMyDescription holds parameters for the getMyDescription method.
+// See https://core.telegram.org/bots/api#getmydescription
 type GetMyDescription struct {
 	Language string `json:"language_code,omitempty"`
 }
 
+// GetMyDescription returns the bot's description for the given language.
+// See https://core.telegram.org/bots/api#getmydescription
 func (api *API) GetMyDescription(params GetMyDescription) (BotDescription, error) {
 	req := NewRequest[BotDescription]("getMyDescription", params)
 	return req.Do(api)
 }
 
+// SetMyShortDescription holds parameters for the setMyShortDescription method.
+// See https://core.telegram.org/bots/api#setmyshortdescription
 type SetMyShortDescription struct {
 	ShortDescription string `json:"short_description,omitempty"`
 	Language         string `json:"language_code,omitempty"`
 }
 
+// SetMyShortDescription changes the bot's short description.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmyshortdescription
 func (api *API) SetMyShortDescription(params SetMyShortDescription) (bool, error) {
 	req := NewRequest[bool]("setMyShortDescription", params)
 	return req.Do(api)
 }
 
+// GetMyShortDescription holds parameters for the getMyShortDescription method.
+// See https://core.telegram.org/bots/api#getmyshortdescription
 type GetMyShortDescription struct {
 	Language string `json:"language_code,omitempty"`
 }
 
+// GetMyShortDescription returns the bot's short description for the given language.
+// See https://core.telegram.org/bots/api#getmyshortdescription
 func (api *API) GetMyShortDescription(params GetMyShortDescription) (BotShortDescription, error) {
 	req := NewRequest[BotShortDescription]("getMyShortDescription", params)
 	return req.Do(api)
 }
 
+// SetMyProfilePhotoP holds parameters for the setMyProfilePhoto method.
+// See https://core.telegram.org/bots/api#setmyprofilephoto
 type SetMyProfilePhotoP struct {
 	Photo InputProfilePhoto `json:"photo"`
 }
 
+// SetMyProfilePhoto changes the bot's profile photo.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmyprofilephoto
 func (api *API) SetMyProfilePhoto(params SetMyProfilePhotoP) (bool, error) {
 	req := NewRequest[bool]("setMyProfilePhoto", params)
 	return req.Do(api)
 }
+
+// RemoveMyProfilePhoto removes the bot's profile photo.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#removemyprofilephoto
 func (api *API) RemoveMyProfilePhoto() (bool, error) {
 	req := NewRequest[bool]("removeMyProfilePhoto", NoParams)
 	return req.Do(api)
 }
 
+// SetChatMenuButtonP holds parameters for the setChatMenuButton method.
+// See https://core.telegram.org/bots/api#setchatmenubutton
 type SetChatMenuButtonP struct {
-	ChatID     int            `json:"chat_id"`
+	ChatID     int64          `json:"chat_id"`
 	MenuButton MenuButtonType `json:"menu_button"`
 }
 
+// SetChatMenuButton changes the menu button for a given chat or the default menu button.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setchatmenubutton
 func (api *API) SetChatMenuButton(params SetChatMenuButtonP) (bool, error) {
 	req := NewRequest[bool]("setChatMenuButton", params)
 	return req.Do(api)
 }
 
+// GetChatMenuButtonP holds parameters for the getChatMenuButton method.
+// See https://core.telegram.org/bots/api#getchatmenubutton
 type GetChatMenuButtonP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// GetChatMenuButton returns the current menu button for the given chat.
+// See https://core.telegram.org/bots/api#getchatmenubutton
 func (api *API) GetChatMenuButton(params GetChatMenuButtonP) (BaseMenuButton, error) {
 	req := NewRequest[BaseMenuButton]("getChatMenuButton", params)
 	return req.Do(api)
 }
 
+// SetMyDefaultAdministratorRightsP holds parameters for the setMyDefaultAdministratorRights method.
+// See https://core.telegram.org/bots/api#setmydefaultadministratorrights
 type SetMyDefaultAdministratorRightsP struct {
 	Rights      *ChatAdministratorRights `json:"rights"`
 	ForChannels bool                     `json:"for_channels"`
 }
 
+// SetMyDefaultAdministratorRights changes the default administrator rights for the bot.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setmydefaultadministratorrights
 func (api *API) SetMyDefaultAdministratorRights(params SetMyDefaultAdministratorRightsP) (bool, error) {
 	req := NewRequest[bool]("setMyDefaultAdministratorRights", params)
 	return req.Do(api)
 }
 
+// GetMyDefaultAdministratorRightsP holds parameters for the getMyDefaultAdministratorRights method.
+// See https://core.telegram.org/bots/api#getmydefaultadministratorrights
 type GetMyDefaultAdministratorRightsP struct {
 	ForChannels bool `json:"for_channels"`
 }
 
+// GetMyDefaultAdministratorRights returns the current default administrator rights for the bot.
+// See https://core.telegram.org/bots/api#getmydefaultadministratorrights
 func (api *API) GetMyDefaultAdministratorRights(params GetMyDefaultAdministratorRightsP) (ChatAdministratorRights, error) {
 	req := NewRequest[ChatAdministratorRights]("getMyDefaultAdministratorRights", params)
 	return req.Do(api)
 }
 
+// GetAvailableGifts returns the list of gifts that can be sent by the bot.
+// See https://core.telegram.org/bots/api#getavailablegifts
 func (api *API) GetAvailableGifts() (Gifts, error) {
 	req := NewRequest[Gifts]("getAvailableGifts", NoParams)
 	return req.Do(api)
 }
 
+// SendGiftP holds parameters for the sendGift method.
+// See https://core.telegram.org/bots/api#sendgift
 type SendGiftP struct {
-	UserID        int             `json:"user_id,omitempty"`
-	ChatID        int             `json:"chat_id,omitempty"`
+	UserID        int64           `json:"user_id,omitempty"`
+	ChatID        int64           `json:"chat_id,omitempty"`
 	GiftID        string          `json:"gift_id"`
 	PayForUpgrade bool            `json:"pay_for_upgrade"`
 	Text          string          `json:"text"`
@@ -154,13 +226,18 @@ type SendGiftP struct {
 	TextEntities  []MessageEntity `json:"text_entities,omitempty"`
 }
 
+// SendGift sends a gift to the given user or chat.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#sendgift
 func (api *API) SendGift(params SendGiftP) (bool, error) {
 	req := NewRequest[bool]("sendGift", params)
 	return req.Do(api)
 }
 
+// GiftPremiumSubscriptionP holds parameters for the giftPremiumSubscription method.
+// See https://core.telegram.org/bots/api#giftpremiumsubscription
 type GiftPremiumSubscriptionP struct {
-	UserID        int             `json:"user_id"`
+	UserID        int64           `json:"user_id"`
 	MonthCount    int             `json:"month_count"`
 	StarCount     int             `json:"star_count"`
 	Text          string          `json:"text,omitempty"`
@@ -168,6 +245,9 @@ type GiftPremiumSubscriptionP struct {
 	TextEntities  []MessageEntity `json:"text_entities,omitempty"`
 }
 
+// GiftPremiumSubscription gifts a Telegram Premium subscription to the user.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#giftpremiumsubscription
 func (api *API) GiftPremiumSubscription(params GiftPremiumSubscriptionP) (bool, error) {
 	req := NewRequest[bool]("giftPremiumSubscription", params)
 	return req.Do(api)

tgapi/bot_types.go

@@ -1,64 +1,91 @@
 package tgapi
 
+// BotCommand represents a bot command.
+// See https://core.telegram.org/bots/api#botcommand
 type BotCommand struct {
 	Command     string `json:"command"`
 	Description string `json:"description"`
 }
+
+// BotCommandScopeType indicates the type of a command scope.
 type BotCommandScopeType string
 
 const (
-	BotCommandScopeDefaultType               BotCommandScopeType = "default"
-	BotCommandScopePrivateType               BotCommandScopeType = "all_private_chats"
-	BotCommandScopeGroupType                 BotCommandScopeType = "all_group_chats"
+	// BotCommandScopeDefaultType is the default command scope.
+	BotCommandScopeDefaultType BotCommandScopeType = "default"
+	// BotCommandScopePrivateType covers all private chats.
+	BotCommandScopePrivateType BotCommandScopeType = "all_private_chats"
+	// BotCommandScopeGroupType covers all group and supergroup chats.
+	BotCommandScopeGroupType BotCommandScopeType = "all_group_chats"
+	// BotCommandScopeAllChatAdministratorsType covers all chat administrators.
 	BotCommandScopeAllChatAdministratorsType BotCommandScopeType = "all_chat_administrators"
-	BotCommandScopeChatType                  BotCommandScopeType = "chat"
-	BotCommandScopeChatAdministratorsType    BotCommandScopeType = "chat_administrators"
-	BotCommandScopeChatMemberType            BotCommandScopeType = "chat_member"
+	// BotCommandScopeChatType covers a specific chat.
+	BotCommandScopeChatType BotCommandScopeType = "chat"
+	// BotCommandScopeChatAdministratorsType covers administrators of a specific chat.
+	BotCommandScopeChatAdministratorsType BotCommandScopeType = "chat_administrators"
+	// BotCommandScopeChatMemberType covers a specific member of a specific chat.
+	BotCommandScopeChatMemberType BotCommandScopeType = "chat_member"
 )
 
+// BotCommandScope represents the scope to which bot commands are applied.
+// See https://core.telegram.org/bots/api#botcommandscope
 type BotCommandScope struct {
 	Type   BotCommandScopeType `json:"type"`
-	ChatID *int                `json:"chat_id,omitempty"`
-	UserID *int                `json:"user_id,omitempty"`
+	ChatID *int64              `json:"chat_id,omitempty"`
+	UserID *int64              `json:"user_id,omitempty"`
 }
 
+// BotName represents the bot's name.
 type BotName struct {
 	Name string `json:"name"`
 }
+
+// BotDescription represents the bot's description.
 type BotDescription struct {
 	Description string `json:"description"`
 }
+
+// BotShortDescription represents the bot's short description.
 type BotShortDescription struct {
 	ShortDescription string `json:"short_description"`
 }
 
+// InputProfilePhotoType indicates the type of a profile photo input.
+type InputProfilePhotoType string
+
 const (
 	InputProfilePhotoStaticType   InputProfilePhotoType = "static"
 	InputProfilePhotoAnimatedType InputProfilePhotoType = "animated"
 )
 
-type InputProfilePhotoType string
+// InputProfilePhoto describes a profile photo to set.
+// See https://core.telegram.org/bots/api#inputprofilephoto
 type InputProfilePhoto struct {
 	Type InputProfilePhotoType `json:"type"`
 
-	// Static
+	// Static fields (for static photos)
 	Photo *string `json:"photo,omitempty"`
 
-	// Animated
+	// Animated fields (for animated profile videos)
 	Animation          *string  `json:"animation,omitempty"`
 	MainFrameTimestamp *float64 `json:"main_frame_timestamp,omitempty"`
 }
 
+// MenuButtonType indicates the type of a menu button.
+type MenuButtonType string
+
 const (
 	MenuButtonCommandsType MenuButtonType = "commands"
 	MenuButtonWebAppType   MenuButtonType = "web_app"
 	MenuButtonDefaultType  MenuButtonType = "default"
 )
 
-type MenuButtonType string
+// BaseMenuButton represents a menu button.
+// See https://core.telegram.org/bots/api#menubutton
 type BaseMenuButton struct {
 	Type MenuButtonType `json:"type"`
-	// WebApp
+
+	// WebApp fields (for web_app button)
 	Text   string     `json:"text"`
 	WebApp WebAppInfo `json:"web_app"`
 }

tgapi/business_methods.go

@@ -1,146 +1,230 @@
 package tgapi
 
+// VerifyUserP holds parameters for the verifyUser method.
+// See https://core.telegram.org/bots/api#verifyuser
 type VerifyUserP struct {
-	UserID            int    `json:"user_id"`
+	UserID            int64  `json:"user_id"`
 	CustomDescription string `json:"custom_description,omitempty"`
 }
 
+// VerifyUser verifies a user.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#verifyuser
 func (api *API) VerifyUser(params VerifyUserP) (bool, error) {
 	req := NewRequest[bool]("verifyUser", params)
 	return req.Do(api)
 }
 
+// VerifyChatP holds parameters for the verifyChat method.
+// See https://core.telegram.org/bots/api#verifychat
 type VerifyChatP struct {
-	ChatID            int    `json:"chat_id"`
+	ChatID            int64  `json:"chat_id"`
 	CustomDescription string `json:"custom_description,omitempty"`
 }
 
+// VerifyChat verifies a chat.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#verifychat
 func (api *API) VerifyChat(params VerifyChatP) (bool, error) {
 	req := NewRequest[bool]("verifyChat", params)
 	return req.Do(api)
 }
 
+// RemoveUserVerificationP holds parameters for the removeUserVerification method.
+// See https://core.telegram.org/bots/api#removeuserverification
 type RemoveUserVerificationP struct {
-	UserID int `json:"user_id"`
+	UserID int64 `json:"user_id"`
 }
 
+// RemoveUserVerification removes a user's verification.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#removeuserverification
 func (api *API) RemoveUserVerification(params RemoveUserVerificationP) (bool, error) {
 	req := NewRequest[bool]("removeUserVerification", params)
 	return req.Do(api)
 }
 
+// RemoveChatVerificationP holds parameters for the removeChatVerification method.
+// See https://core.telegram.org/bots/api#removechatverification
 type RemoveChatVerificationP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// RemoveChatVerification removes a chat's verification.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#removechatverification
 func (api *API) RemoveChatVerification(params RemoveChatVerificationP) (bool, error) {
 	req := NewRequest[bool]("removeChatVerification", params)
 	return req.Do(api)
 }
 
+// ReadBusinessMessageP holds parameters for the readBusinessMessage method.
+// See https://core.telegram.org/bots/api#readbusinessmessage
 type ReadBusinessMessageP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
-	ChatID               int    `json:"chat_id"`
+	ChatID               int64  `json:"chat_id"`
 	MessageID            int    `json:"message_id"`
 }
 
+// ReadBusinessMessage marks a business message as read.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#readbusinessmessage
 func (api *API) ReadBusinessMessage(params ReadBusinessMessageP) (bool, error) {
 	req := NewRequest[bool]("readBusinessMessage", params)
 	return req.Do(api)
 }
 
-type DeleteBusinessMessageP struct {
+// GetBusinessConnectionP holds parameters for the getBusinessConnection method.
+// See https://core.telegram.org/bots/api#getbusinessconnection
+type GetBusinessConnectionP struct {
+	BusinessConnectionID string `json:"business_connection_id"`
+}
+
+// GetBusinessConnection returns information about a business connection.
+// See https://core.telegram.org/bots/api#getbusinessconnection
+func (api *API) GetBusinessConnection(params GetBusinessConnectionP) (BusinessConnection, error) {
+	req := NewRequest[BusinessConnection]("getBusinessConnection", params)
+	return req.Do(api)
+}
+
+// DeleteBusinessMessagesP holds parameters for the deleteBusinessMessages method.
+// See https://core.telegram.org/bots/api#deletebusinessmessages
+type DeleteBusinessMessagesP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	MessageIDs           []int  `json:"message_ids"`
 }
 
-func (api *API) DeleteBusinessMessage(params DeleteBusinessMessageP) (bool, error) {
-	req := NewRequest[bool]("deleteBusinessMessage", params)
+// DeleteBusinessMessages deletes business messages.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#deletebusinessmessages
+func (api *API) DeleteBusinessMessages(params DeleteBusinessMessagesP) (bool, error) {
+	req := NewRequest[bool]("deleteBusinessMessages", params)
 	return req.Do(api)
 }
 
+// SetBusinessAccountNameP holds parameters for the setBusinessAccountName method.
+// See https://core.telegram.org/bots/api#setbusinessaccountname
 type SetBusinessAccountNameP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	FirstName            string `json:"first_name"`
 	LastName             string `json:"last_name,omitempty"`
 }
 
+// SetBusinessAccountName sets the first and last name of a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setbusinessaccountname
 func (api *API) SetBusinessAccountName(params SetBusinessAccountNameP) (bool, error) {
 	req := NewRequest[bool]("setBusinessAccountName", params)
 	return req.Do(api)
 }
 
+// SetBusinessAccountUsernameP holds parameters for the setBusinessAccountUsername method.
+// See https://core.telegram.org/bots/api#setbusinessaccountusername
 type SetBusinessAccountUsernameP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	Username             string `json:"username,omitempty"`
 }
 
+// SetBusinessAccountUsername sets the username of a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setbusinessaccountusername
 func (api *API) SetBusinessAccountUsername(params SetBusinessAccountUsernameP) (bool, error) {
 	req := NewRequest[bool]("setBusinessAccountUsername", params)
 	return req.Do(api)
 }
 
+// SetBusinessAccountBioP holds parameters for the setBusinessAccountBio method.
+// See https://core.telegram.org/bots/api#setbusinessaccountbio
 type SetBusinessAccountBioP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	Bio                  string `json:"bio,omitempty"`
 }
 
+// SetBusinessAccountBio sets the bio of a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setbusinessaccountbio
 func (api *API) SetBusinessAccountBio(params SetBusinessAccountBioP) (bool, error) {
 	req := NewRequest[bool]("setBusinessAccountBio", params)
 	return req.Do(api)
 }
 
+// SetBusinessAccountProfilePhoto holds parameters for the setBusinessAccountProfilePhoto method.
+// See https://core.telegram.org/bots/api#setbusinessaccountprofilephoto
 type SetBusinessAccountProfilePhoto struct {
 	BusinessConnectionID string            `json:"business_connection_id"`
 	Photo                InputProfilePhoto `json:"photo,omitempty"`
 	IsPublic             bool              `json:"is_public,omitempty"`
 }
 
+// SetBusinessAccountProfilePhoto sets the profile photo of a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setbusinessaccountprofilephoto
 func (api *API) SetBusinessAccountProfilePhoto(params SetBusinessAccountProfilePhoto) (bool, error) {
 	req := NewRequest[bool]("setBusinessAccountProfilePhoto", params)
 	return req.Do(api)
 }
 
+// RemoveBusinessAccountProfilePhotoP holds parameters for the removeBusinessAccountProfilePhoto method.
+// See https://core.telegram.org/bots/api#removebusinessaccountprofilephoto
 type RemoveBusinessAccountProfilePhotoP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	IsPublic             bool   `json:"is_public,omitempty"`
 }
 
+// RemoveBusinessAccountProfilePhoto removes the profile photo of a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#removebusinessaccountprofilephoto
 func (api *API) RemoveBusinessAccountProfilePhoto(params RemoveBusinessAccountProfilePhotoP) (bool, error) {
 	req := NewRequest[bool]("removeBusinessAccountProfilePhoto", params)
 	return req.Do(api)
 }
 
+// SetBusinessAccountGiftSettingsP holds parameters for the setBusinessAccountGiftSettings method.
+// See https://core.telegram.org/bots/api#setbusinessaccountgiftsettings
 type SetBusinessAccountGiftSettingsP struct {
 	BusinessConnectionID string            `json:"business_connection_id"`
 	ShowGiftButton       bool              `json:"show_gift_button"`
 	AcceptedGiftTypes    AcceptedGiftTypes `json:"accepted_gift_types"`
 }
 
+// SetBusinessAccountGiftSettings sets gift settings for a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setbusinessaccountgiftsettings
 func (api *API) SetBusinessAccountGiftSettings(params SetBusinessAccountGiftSettingsP) (bool, error) {
 	req := NewRequest[bool]("setBusinessAccountGiftSettings", params)
 	return req.Do(api)
 }
 
+// GetBusinessAccountStarBalanceP holds parameters for the getBusinessAccountStarBalance method.
+// See https://core.telegram.org/bots/api#getbusinessaccountstarbalance
 type GetBusinessAccountStarBalanceP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 }
 
+// GetBusinessAccountStarBalance returns the star balance of a business account.
+// See https://core.telegram.org/bots/api#getbusinessaccountstarbalance
 func (api *API) GetBusinessAccountStarBalance(params GetBusinessAccountStarBalanceP) (StarAmount, error) {
-	req := NewRequest[StarAmount]("getBusinessAccountGiftSettings", params)
+	req := NewRequest[StarAmount]("getBusinessAccountStarBalance", params)
 	return req.Do(api)
 }
 
-type TransferBusinessAccountStartP struct {
+// TransferBusinessAccountStarsP holds parameters for the transferBusinessAccountStars method.
+// See https://core.telegram.org/bots/api#transferbusinessaccountstars
+type TransferBusinessAccountStarsP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	StarCount            int    `json:"star_count"`
 }
 
-func (api *API) TransferBusinessAccountStart(params TransferBusinessAccountStartP) (bool, error) {
-	req := NewRequest[bool]("transferBusinessAccountStart", params)
+// TransferBusinessAccountStars transfers stars from a business account.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#transferbusinessaccountstars
+func (api *API) TransferBusinessAccountStars(params TransferBusinessAccountStarsP) (bool, error) {
+	req := NewRequest[bool]("transferBusinessAccountStars", params)
 	return req.Do(api)
 }
 
+// GetBusinessAccountGiftsP holds parameters for the getBusinessAccountGifts method.
+// See https://core.telegram.org/bots/api#getbusinessaccountgifts
 type GetBusinessAccountGiftsP struct {
 	BusinessConnectionID        string `json:"business_connection_id"`
 	ExcludeUnsaved              bool   `json:"exclude_unsaved,omitempty"`
@@ -155,21 +239,30 @@ type GetBusinessAccountGiftsP struct {
 	Limit                       int    `json:"limit,omitempty"`
 }
 
+// GetBusinessAccountGifts returns gifts owned by a business account.
+// See https://core.telegram.org/bots/api#getbusinessaccountgifts
 func (api *API) GetBusinessAccountGifts(params GetBusinessAccountGiftsP) (OwnedGifts, error) {
 	req := NewRequest[OwnedGifts]("getBusinessAccountGifts", params)
 	return req.Do(api)
 }
 
+// ConvertGiftToStarsP holds parameters for the convertGiftToStars method.
+// See https://core.telegram.org/bots/api#convertgifttostars
 type ConvertGiftToStarsP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	OwnedGiftID          string `json:"owned_gift_id"`
 }
 
+// ConvertGiftToStars converts a gift to Telegram Stars.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#convertgifttostars
 func (api *API) ConvertGiftToStars(params ConvertGiftToStarsP) (bool, error) {
 	req := NewRequest[bool]("convertGiftToStars", params)
 	return req.Do(api)
 }
 
+// UpgradeGiftP holds parameters for the upgradeGift method.
+// See https://core.telegram.org/bots/api#upgradegift
 type UpgradeGiftP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	OwnedGiftID          string `json:"owned_gift_id"`
@@ -177,23 +270,33 @@ type UpgradeGiftP struct {
 	StarCount            int    `json:"star_count,omitempty"`
 }
 
+// UpgradeGift upgrades a gift.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#upgradegift
 func (api *API) UpgradeGift(params UpgradeGiftP) (bool, error) {
 	req := NewRequest[bool]("upgradeGift", params)
 	return req.Do(api)
 }
 
+// TransferGiftP holds parameters for the transferGift method.
+// See https://core.telegram.org/bots/api#transfergift
 type TransferGiftP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	OwnedGiftID          string `json:"owned_gift_id"`
-	NewOwnerChatID       int    `json:"new_owner_chat_id"`
+	NewOwnerChatID       int64  `json:"new_owner_chat_id"`
 	StarCount            int    `json:"star_count,omitempty"`
 }
 
+// TransferGift transfers a gift to another chat.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#transfergift
 func (api *API) TransferGift(params TransferGiftP) (bool, error) {
 	req := NewRequest[bool]("transferGift", params)
 	return req.Do(api)
 }
 
+// PostStoryP holds parameters for the postStory method.
+// See https://core.telegram.org/bots/api#poststory
 type PostStoryP struct {
 	BusinessConnectionID string            `json:"business_connection_id"`
 	Content              InputStoryContent `json:"content"`
@@ -208,29 +311,41 @@ type PostStoryP struct {
 	ProtectContent bool `json:"protect_content,omitempty"`
 }
 
+// PostStoryPhoto posts a story with a photo.
+// See https://core.telegram.org/bots/api#poststory
 func (api *API) PostStoryPhoto(params PostStoryP) (Story, error) {
 	req := NewRequest[Story]("postStory", params)
 	return req.Do(api)
 }
+
+// PostStoryVideo posts a story with a video.
+// See https://core.telegram.org/bots/api#poststory
 func (api *API) PostStoryVideo(params PostStoryP) (Story, error) {
 	req := NewRequest[Story]("postStory", params)
 	return req.Do(api)
 }
 
+// RepostStoryP holds parameters for the repostStory method.
+// See https://core.telegram.org/bots/api#repoststory
 type RepostStoryP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
-	FromChatID           int    `json:"from_chat_id"`
+	FromChatID           int64  `json:"from_chat_id"`
 	FromStoryID          int    `json:"from_story_id"`
 	ActivePeriod         int    `json:"active_period"`
 	PostToChatPage       bool   `json:"post_to_chat_page,omitempty"`
 	ProtectContent       bool   `json:"protect_content,omitempty"`
 }
 
+// RepostStory reposts a story from another chat.
+// Returns the reposted story.
+// See https://core.telegram.org/bots/api#repoststory
 func (api *API) RepostStory(params RepostStoryP) (Story, error) {
 	req := NewRequest[Story]("repostStory", params)
 	return req.Do(api)
 }
 
+// EditStoryP holds parameters for the editStory method.
+// See https://core.telegram.org/bots/api#editstory
 type EditStoryP struct {
 	BusinessConnectionID string            `json:"business_connection_id"`
 	StoryID              int               `json:"story_id"`
@@ -242,16 +357,24 @@ type EditStoryP struct {
 	Areas           []StoryArea     `json:"areas,omitempty"`
 }
 
+// EditStory edits an existing story.
+// Returns the updated story.
+// See https://core.telegram.org/bots/api#editstory
 func (api *API) EditStory(params EditStoryP) (Story, error) {
 	req := NewRequest[Story]("editStory", params)
 	return req.Do(api)
 }
 
+// DeleteStoryP holds parameters for the deleteStory method.
+// See https://core.telegram.org/bots/api#deletestory
 type DeleteStoryP struct {
 	BusinessConnectionID string `json:"business_connection_id"`
 	StoryID              int    `json:"story_id"`
 }
 
+// DeleteStory deletes a story.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#deletestory
 func (api *API) DeleteStory(params DeleteStoryP) (bool, error) {
 	req := NewRequest[bool]("deleteStory", params)
 	return req.Do(api)

tgapi/business_types.go

@@ -1,23 +1,37 @@
 package tgapi
 
+// BusinessIntro contains information about the business intro.
+// See https://core.telegram.org/bots/api#businessintro
 type BusinessIntro struct {
 	Title   string   `json:"title,omitempty"`
 	Message string   `json:"message,omitempty"`
 	Sticker *Sticker `json:"sticker,omitempty"`
 }
+
+// BusinessLocation contains information about the business location.
+// See https://core.telegram.org/bots/api#businesslocation
 type BusinessLocation struct {
 	Address  string    `json:"address"`
 	Location *Location `json:"location,omitempty"`
 }
+
+// BusinessOpeningHoursInterval represents an interval of opening hours.
+// See https://core.telegram.org/bots/api#businessopeninghoursinterval
 type BusinessOpeningHoursInterval struct {
 	OpeningMinute int `json:"opening_minute"`
 	ClosingMinute int `json:"closing_minute"`
 }
+
+// BusinessOpeningHours represents the opening hours of a business.
+// See https://core.telegram.org/bots/api#businessopeninghours
 type BusinessOpeningHours struct {
-	TimeZoneName string      `json:"time_zone_name"`
-	OpeningHours []Birthdate `json:"opening_hours"`
+	TimeZoneName string                         `json:"time_zone_name"`
+	OpeningHours []BusinessOpeningHoursInterval `json:"opening_hours"`
 }
 
+// BusinessBotRights represents the rights of a business bot.
+// All fields are optional booleans that, when present, are always true.
+// See https://core.telegram.org/bots/api#businessbotrights
 type BusinessBotRights struct {
 	CanReply                   *bool `json:"can_reply,omitempty"`
 	CanReadMessages            *bool `json:"can_read_messages,omitempty"`
@@ -34,33 +48,43 @@ type BusinessBotRights struct {
 	CanTransferStars           *bool `json:"can_transfer_stars,omitempty"`
 	CanManageStories           *bool `json:"can_manage_stories,omitempty"`
 }
+
+// BusinessConnection contains information about a business connection.
+// See https://core.telegram.org/bots/api#businessconnection
 type BusinessConnection struct {
 	ID         string             `json:"id"`
 	User       User               `json:"user"`
-	UserChatID int                `json:"user_chat_id"`
+	UserChatID int64              `json:"user_chat_id"`
 	Date       int                `json:"date"`
 	Rights     *BusinessBotRights `json:"rights,omitempty"`
-	IsEnabled  bool               `json:"id_enabled"`
+	IsEnabled  bool               `json:"is_enabled"`
 }
 
+// InputStoryContentType indicates the type of input story content.
+type InputStoryContentType string
+
 const (
 	InputStoryContentPhotoType InputStoryContentType = "photo"
 	InputStoryContentVideoType InputStoryContentType = "video"
 )
 
-type InputStoryContentType string
+// InputStoryContent represents the content of a story to be posted.
+// See https://core.telegram.org/bots/api#inputstorycontent
 type InputStoryContent struct {
 	Type InputStoryContentType `json:"type"`
-	// Photo
+
+	// Photo fields
 	Photo *string `json:"photo,omitempty"`
 
-	// Video
+	// Video fields
 	Video               *string  `json:"video,omitempty"`
 	Duration            *float64 `json:"duration,omitempty"`
 	CoverFrameTimestamp *float64 `json:"cover_frame_timestamp,omitempty"`
 	IsAnimation         *bool    `json:"is_animation,omitempty"`
 }
 
+// StoryAreaPosition describes the position of a clickable area on a story.
+// See https://core.telegram.org/bots/api#storyareaposition
 type StoryAreaPosition struct {
 	XPercentage            float64 `json:"x_percentage"`
 	YPercentage            float64 `json:"y_percentage"`
@@ -70,6 +94,9 @@ type StoryAreaPosition struct {
 	CornerRadiusPercentage float64 `json:"corner_radius_percentage"`
 }
 
+// StoryAreaTypeType indicates the type of story area.
+type StoryAreaTypeType string
+
 const (
 	StoryAreaTypeLocationType   StoryAreaTypeType = "location"
 	StoryAreaTypeReactionType   StoryAreaTypeType = "suggested_reaction"
@@ -78,26 +105,36 @@ const (
 	StoryAreaTypeUniqueGiftType StoryAreaTypeType = "unique_gift"
 )
 
-type StoryAreaTypeType string
+// StoryAreaType describes the type of a clickable area on a story.
+// Fields should be set according to the Type.
+// See https://core.telegram.org/bots/api#storyareatype
 type StoryAreaType struct {
 	Type StoryAreaTypeType `json:"type"`
 
+	// Location
 	Latitude  *float64         `json:"latitude,omitempty"`
 	Longitude *float64         `json:"longitude,omitempty"`
 	Address   *LocationAddress `json:"address,omitempty"`
 
+	// Suggested reaction
 	ReactionType *ReactionType `json:"reaction_type,omitempty"`
 	IsDark       *bool         `json:"is_dark,omitempty"`
 	IsFlipped    *bool         `json:"is_flipped,omitempty"`
 
+	// Link
 	URL *string `json:"url,omitempty"`
 
+	// Weather
 	Temperature     *float64 `json:"temperature,omitempty"`
-	Emoji           *string  `json:"emoji"`
-	BackgroundColor *int     `json:"background_color"`
+	Emoji           *string  `json:"emoji,omitempty"`
+	BackgroundColor *int     `json:"background_color,omitempty"`
 
+	// Unique gift
 	Name *string `json:"name,omitempty"`
 }
+
+// StoryArea represents a clickable area on a story.
+// See https://core.telegram.org/bots/api#storyarea
 type StoryArea struct {
 	Position StoryAreaPosition `json:"position"`
 	Type     StoryAreaType     `json:"type"`

tgapi/chat_methods.go

@@ -1,45 +1,62 @@
 package tgapi
 
+// BanChatMemberP holds parameters for the banChatMember method.
+// See https://core.telegram.org/bots/api#banchatmember
 type BanChatMemberP struct {
-	ChatID         int  `json:"chat_id"`
-	UserID         int  `json:"user_id"`
-	UntilDate      int  `json:"until_date,omitempty"`
-	RevokeMessages bool `json:"revoke_messages,omitempty"`
+	ChatID         int64 `json:"chat_id"`
+	UserID         int64 `json:"user_id"`
+	UntilDate      int   `json:"until_date,omitempty"`
+	RevokeMessages bool  `json:"revoke_messages,omitempty"`
 }
 
+// BanChatMember bans a user in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#banchatmember
 func (api *API) BanChatMember(params BanChatMemberP) (bool, error) {
-	req := NewRequest[bool]("banChatMember", params)
+	req := NewRequestWithChatID[bool]("banChatMember", params, params.ChatID)
 	return req.Do(api)
 }
 
+// UnbanChatMemberP holds parameters for the unbanChatMember method.
+// See https://core.telegram.org/bots/api#unbanchatmember
 type UnbanChatMemberP struct {
-	ChatID       int  `json:"chat_id"`
-	UserID       int  `json:"user_id"`
-	OnlyIfBanned bool `json:"only_if_banned"`
+	ChatID       int64 `json:"chat_id"`
+	UserID       int64 `json:"user_id"`
+	OnlyIfBanned bool  `json:"only_if_banned"`
 }
 
+// UnbanChatMember unbans a previously banned user in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unbanchatmember
 func (api *API) UnbanChatMember(params UnbanChatMemberP) (bool, error) {
-	req := NewRequest[bool]("unbanChatMember", params)
+	req := NewRequestWithChatID[bool]("unbanChatMember", params, params.ChatID)
 	return req.Do(api)
 }
 
+// RestrictChatMemberP holds parameters for the restrictChatMember method.
+// See https://core.telegram.org/bots/api#restrictchatmember
 type RestrictChatMemberP struct {
-	ChatID                        int             `json:"chat_id"`
-	UserID                        int             `json:"user_id"`
+	ChatID                        int64           `json:"chat_id"`
+	UserID                        int64           `json:"user_id"`
 	Permissions                   ChatPermissions `json:"permissions"`
 	UseIndependentChatPermissions bool            `json:"use_independent_chat_permissions,omitempty"`
 	UntilDate                     int             `json:"until_date,omitempty"`
 }
 
+// RestrictChatMember restricts a user in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#restrictchatmember
 func (api *API) RestrictChatMember(params RestrictChatMemberP) (bool, error) {
-	req := NewRequest[bool]("restrictChatMember", params)
+	req := NewRequestWithChatID[bool]("restrictChatMember", params, params.ChatID)
 	return req.Do(api)
 }
 
+// PromoteChatMember holds parameters for the promoteChatMember method.
+// See https://core.telegram.org/bots/api#promotechatmember
 type PromoteChatMember struct {
-	ChatID      int  `json:"chat_id"`
-	UserID      int  `json:"user_id"`
-	IsAnonymous bool `json:"is_anonymous,omitempty"`
+	ChatID      int64 `json:"chat_id"`
+	UserID      int64 `json:"user_id"`
+	IsAnonymous bool  `json:"is_anonymous,omitempty"`
 
 	CanManageChat           bool `json:"can_manage_chat,omitempty"`
 	CanDeleteMessages       bool `json:"can_delete_messages,omitempty"`
@@ -59,297 +76,446 @@ type PromoteChatMember struct {
 	CanManageTags           bool `json:"can_manage_tags,omitempty"`
 }
 
+// PromoteChatMember promotes or demotes a user in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#promotechatmember
 func (api *API) PromoteChatMember(params PromoteChatMember) (bool, error) {
-	req := NewRequest[bool]("promoteChatMember", params)
+	req := NewRequestWithChatID[bool]("promoteChatMember", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatAdministratorCustomTitleP holds parameters for the setChatAdministratorCustomTitle method.
+// See https://core.telegram.org/bots/api#setchatadministratorcustomtitle
 type SetChatAdministratorCustomTitleP struct {
-	ChatID      int    `json:"chat_id"`
-	UserID      int    `json:"user_id"`
+	ChatID      int64  `json:"chat_id"`
+	UserID      int64  `json:"user_id"`
 	CustomTitle string `json:"custom_title"`
 }
 
+// SetChatAdministratorCustomTitle sets a custom title for an administrator.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatadministratorcustomtitle
 func (api *API) SetChatAdministratorCustomTitle(params SetChatAdministratorCustomTitleP) (bool, error) {
-	req := NewRequest[bool]("setChatAdministratorCustomTitle", params)
+	req := NewRequestWithChatID[bool]("setChatAdministratorCustomTitle", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatMemberTagP holds parameters for the setChatMemberTag method.
+// See https://core.telegram.org/bots/api#setchatmembertag
 type SetChatMemberTagP struct {
-	ChatID int    `json:"chat_id"`
-	UserID int    `json:"user_id"`
+	ChatID int64  `json:"chat_id"`
+	UserID int64  `json:"user_id"`
 	Tag    string `json:"tag,omitempty"`
 }
 
+// SetChatMemberTag sets a tag for a chat member.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatmembertag
 func (api *API) SetChatMemberTag(params SetChatMemberTagP) (bool, error) {
-	req := NewRequest[bool]("setChatMemberTag", params)
+	req := NewRequestWithChatID[bool]("setChatMemberTag", params, params.ChatID)
 	return req.Do(api)
 }
 
+// BanChatSenderChatP holds parameters for the banChatSenderChat method.
+// See https://core.telegram.org/bots/api#banchatsenderchat
 type BanChatSenderChatP struct {
-	ChatID       int `json:"chat_id"`
-	SenderChatID int `json:"sender_chat_id"`
+	ChatID       int64 `json:"chat_id"`
+	SenderChatID int64 `json:"sender_chat_id"`
 }
 
+// BanChatSenderChat bans a channel chat in a supergroup or channel.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#banchatsenderchat
 func (api *API) BanChatSenderChat(params BanChatSenderChatP) (bool, error) {
-	req := NewRequest[bool]("banChatSenderChat", params)
+	req := NewRequestWithChatID[bool]("banChatSenderChat", params, params.ChatID)
 	return req.Do(api)
 }
 
+// UnbanChatSenderChatP holds parameters for the unbanChatSenderChat method.
+// See https://core.telegram.org/bots/api#unbanchatsenderchat
 type UnbanChatSenderChatP struct {
-	ChatID       int `json:"chat_id"`
-	SenderChatID int `json:"sender_chat_id"`
+	ChatID       int64 `json:"chat_id"`
+	SenderChatID int64 `json:"sender_chat_id"`
 }
 
-func (api *API) UnbanChatSenderChat(params BanChatSenderChatP) (bool, error) {
-	req := NewRequest[bool]("unbanChatSenderChat", params)
+// UnbanChatSenderChat unbans a previously banned channel chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unbanchatsenderchat
+func (api *API) UnbanChatSenderChat(params UnbanChatSenderChatP) (bool, error) {
+	req := NewRequestWithChatID[bool]("unbanChatSenderChat", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatPermissionsP holds parameters for the setChatPermissions method.
+// See https://core.telegram.org/bots/api#setchatpermissions
 type SetChatPermissionsP struct {
-	ChatID                        int             `json:"chat_id"`
+	ChatID                        int64           `json:"chat_id"`
 	Permissions                   ChatPermissions `json:"permissions"`
 	UseIndependentChatPermissions bool            `json:"use_independent_chat_permissions,omitempty"`
 }
 
+// SetChatPermissions sets default chat permissions for all members.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatpermissions
 func (api *API) SetChatPermissions(params SetChatPermissionsP) (bool, error) {
-	req := NewRequest[bool]("setChatPermissions", params)
+	req := NewRequestWithChatID[bool]("setChatPermissions", params, params.ChatID)
 	return req.Do(api)
 }
 
+// ExportChatInviteLinkP holds parameters for the exportChatInviteLink method.
+// See https://core.telegram.org/bots/api#exportchatinvitelink
 type ExportChatInviteLinkP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// ExportChatInviteLink generates a new primary invite link for a chat.
+// Returns the new invite link as string.
+// See https://core.telegram.org/bots/api#exportchatinvitelink
 func (api *API) ExportChatInviteLink(params ExportChatInviteLinkP) (string, error) {
-	req := NewRequest[string]("exportChatInviteLink", params)
+	req := NewRequestWithChatID[string]("exportChatInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// CreateChatInviteLinkP holds parameters for the createChatInviteLink method.
+// See https://core.telegram.org/bots/api#createchatinvitelink
 type CreateChatInviteLinkP struct {
-	ChatID             int     `json:"chat_id"`
+	ChatID             int64   `json:"chat_id"`
 	Name               *string `json:"name,omitempty"`
 	ExpireDate         int     `json:"expire_date,omitempty"`
 	MemberLimit        int     `json:"member_limit,omitempty"`
-	CreatesJoinRequest int     `json:"creates_join_request,omitempty"`
+	CreatesJoinRequest bool    `json:"creates_join_request,omitempty"`
 }
 
+// CreateChatInviteLink creates an additional invite link for a chat.
+// Returns the created invite link.
+// See https://core.telegram.org/bots/api#createchatinvitelink
 func (api *API) CreateChatInviteLink(params CreateChatInviteLinkP) (ChatInviteLink, error) {
-	req := NewRequest[ChatInviteLink]("createChatInviteLink", params)
+	req := NewRequestWithChatID[ChatInviteLink]("createChatInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// EditChatInviteLinkP holds parameters for the editChatInviteLink method.
+// See https://core.telegram.org/bots/api#editchatinvitelink
 type EditChatInviteLinkP struct {
-	ChatID     int    `json:"chat_id"`
+	ChatID     int64  `json:"chat_id"`
 	InviteLink string `json:"invite_link"`
 
 	Name               string `json:"name,omitempty"`
 	ExpireDate         int    `json:"expire_date,omitempty"`
 	MemberLimit        int    `json:"member_limit,omitempty"`
-	CreatesJoinRequest int    `json:"creates_join_request,omitempty"`
+	CreatesJoinRequest bool   `json:"creates_join_request,omitempty"`
 }
 
+// EditChatInviteLink edits a non‑primary invite link.
+// Returns the edited invite link.
+// See https://core.telegram.org/bots/api#editchatinvitelink
 func (api *API) EditChatInviteLink(params EditChatInviteLinkP) (ChatInviteLink, error) {
-	req := NewRequest[ChatInviteLink]("editChatInviteLink", params)
+	req := NewRequestWithChatID[ChatInviteLink]("editChatInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// CreateChatSubscriptionInviteLinkP holds parameters for the createChatSubscriptionInviteLink method.
+// See https://core.telegram.org/bots/api#createchatsubscriptioninvitelink
 type CreateChatSubscriptionInviteLinkP struct {
-	ChatID             int    `json:"chat_id"`
+	ChatID             int64  `json:"chat_id"`
 	Name               string `json:"name,omitempty"`
 	SubscriptionPeriod int    `json:"subscription_period,omitempty"`
 	SubscriptionPrice  int    `json:"subscription_price,omitempty"`
 }
 
+// CreateChatSubscriptionInviteLink creates a subscription invite link for a channel chat.
+// Returns the created invite link.
+// See https://core.telegram.org/bots/api#createchatsubscriptioninvitelink
 func (api *API) CreateChatSubscriptionInviteLink(params CreateChatSubscriptionInviteLinkP) (ChatInviteLink, error) {
-	req := NewRequest[ChatInviteLink]("createChatSubscriptionInviteLink", params)
+	req := NewRequestWithChatID[ChatInviteLink]("createChatSubscriptionInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// EditChatSubscriptionInviteLinkP holds parameters for the editChatSubscriptionInviteLink method.
+// See https://core.telegram.org/bots/api#editchatsubscriptioninvitelink
 type EditChatSubscriptionInviteLinkP struct {
-	ChatID     int    `json:"chat_id"`
+	ChatID     int64  `json:"chat_id"`
 	InviteLink string `json:"invite_link"`
 	Name       string `json:"name,omitempty"`
 }
 
+// EditChatSubscriptionInviteLink edits a subscription invite link.
+// Returns the edited invite link.
+// See https://core.telegram.org/bots/api#editchatsubscriptioninvitelink
 func (api *API) EditChatSubscriptionInviteLink(params EditChatSubscriptionInviteLinkP) (ChatInviteLink, error) {
-	req := NewRequest[ChatInviteLink]("editChatSubscriptionInviteLink", params)
+	req := NewRequestWithChatID[ChatInviteLink]("editChatSubscriptionInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// RevokeChatInviteLinkP holds parameters for the revokeChatInviteLink method.
+// See https://core.telegram.org/bots/api#revokechatinvitelink
 type RevokeChatInviteLinkP struct {
-	ChatID     int    `json:"chat_id"`
+	ChatID     int64  `json:"chat_id"`
 	InviteLink string `json:"invite_link"`
 }
 
+// RevokeChatInviteLink revokes an invite link.
+// Returns the revoked invite link object.
+// See https://core.telegram.org/bots/api#revokechatinvitelink
 func (api *API) RevokeChatInviteLink(params RevokeChatInviteLinkP) (ChatInviteLink, error) {
-	req := NewRequest[ChatInviteLink]("revokeChatInviteLink", params)
+	req := NewRequestWithChatID[ChatInviteLink]("revokeChatInviteLink", params, params.ChatID)
 	return req.Do(api)
 }
 
+// ApproveChatJoinRequestP holds parameters for the approveChatJoinRequest method.
+// See https://core.telegram.org/bots/api#approvechatjoinrequest
 type ApproveChatJoinRequestP struct {
-	ChatID int `json:"chat_id"`
-	UserID int `json:"user_id"`
+	ChatID int64 `json:"chat_id"`
+	UserID int64 `json:"user_id"`
 }
 
+// ApproveChatJoinRequest approves a chat join request.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#approvechatjoinrequest
 func (api *API) ApproveChatJoinRequest(params ApproveChatJoinRequestP) (bool, error) {
-	req := NewRequest[bool]("approveChatJoinRequest", params)
+	req := NewRequestWithChatID[bool]("approveChatJoinRequest", params, params.ChatID)
 	return req.Do(api)
 }
 
+// DeclineChatJoinRequestP holds parameters for the declineChatJoinRequest method.
+// See https://core.telegram.org/bots/api#declinechatjoinrequest
 type DeclineChatJoinRequestP struct {
-	ChatID int `json:"chat_id"`
-	UserID int `json:"user_id"`
+	ChatID int64 `json:"chat_id"`
+	UserID int64 `json:"user_id"`
 }
 
+// DeclineChatJoinRequest declines a chat join request.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#declinechatjoinrequest
 func (api *API) DeclineChatJoinRequest(params DeclineChatJoinRequestP) (bool, error) {
-	req := NewRequest[bool]("declineChatJoinRequest", params)
+	req := NewRequestWithChatID[bool]("declineChatJoinRequest", params, params.ChatID)
 	return req.Do(api)
 }
 
-func (api *API) SetChatPhoto() {
+// SetChatPhotoP holds parameters for the setChatPhoto method.
+// See https://core.telegram.org/bots/api#setchatphoto
+type SetChatPhotoP struct {
+	ChatID int64 `json:"chat_id"`
+}
+
+// SetChatPhoto changes the chat photo.
+// photo is the file to upload as the new photo.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatphoto
+func (api *API) SetChatPhoto(params SetChatPhotoP, photo UploaderFile) (bool, error) {
 	uploader := NewUploader(api)
-	defer uploader.Close()
+	defer func() {
+		_ = uploader.Close()
+	}()
+	req := NewUploaderRequestWithChatID[bool]("setChatPhoto", params, params.ChatID, photo.SetType(UploaderPhotoType))
+	return req.Do(uploader)
 }
 
+// DeleteChatPhotoP holds parameters for the deleteChatPhoto method.
+// See https://core.telegram.org/bots/api#deletechatphoto
 type DeleteChatPhotoP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// DeleteChatPhoto deletes a chat photo.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletechatphoto
 func (api *API) DeleteChatPhoto(params DeleteChatPhotoP) (bool, error) {
-	req := NewRequest[bool]("deleteChatPhoto", params)
+	req := NewRequestWithChatID[bool]("deleteChatPhoto", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatTitleP holds parameters for the setChatTitle method.
+// See https://core.telegram.org/bots/api#setchattitle
 type SetChatTitleP struct {
-	ChatID int    `json:"chat_id"`
+	ChatID int64  `json:"chat_id"`
 	Title  string `json:"title"`
 }
 
+// SetChatTitle changes the chat title.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchattitle
 func (api *API) SetChatTitle(params SetChatTitleP) (bool, error) {
-	req := NewRequest[bool]("setChatTitle", params)
+	req := NewRequestWithChatID[bool]("setChatTitle", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatDescriptionP holds parameters for the setChatDescription method.
+// See https://core.telegram.org/bots/api#setchatdescription
 type SetChatDescriptionP struct {
-	ChatID      int    `json:"chat_id"`
+	ChatID      int64  `json:"chat_id"`
 	Description string `json:"description"`
 }
 
+// SetChatDescription changes the chat description.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatdescription
 func (api *API) SetChatDescription(params SetChatDescriptionP) (bool, error) {
-	req := NewRequest[bool]("setChatDescription", params)
+	req := NewRequestWithChatID[bool]("setChatDescription", params, params.ChatID)
 	return req.Do(api)
 }
 
+// PinChatMessageP holds parameters for the pinChatMessage method.
+// See https://core.telegram.org/bots/api#pinchatmessage
 type PinChatMessageP struct {
 	BusinessConnectionID *string `json:"business_connection_id,omitempty"`
-	ChatID               int     `json:"chat_id"`
+	ChatID               int64   `json:"chat_id"`
 	MessageID            int     `json:"message_id"`
 	DisableNotification  bool    `json:"disable_notification,omitempty"`
 }
 
+// PinChatMessage pins a message in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#pinchatmessage
 func (api *API) PinChatMessage(params PinChatMessageP) (bool, error) {
-	req := NewRequest[bool]("pinChatMessage", params)
+	req := NewRequestWithChatID[bool]("pinChatMessage", params, params.ChatID)
 	return req.Do(api)
 }
 
+// UnpinChatMessageP holds parameters for the unpinChatMessage method.
+// See https://core.telegram.org/bots/api#unpinchatmessage
 type UnpinChatMessageP struct {
 	BusinessConnectionID *string `json:"business_connection_id,omitempty"`
-	ChatID               int     `json:"chat_id"`
+	ChatID               int64   `json:"chat_id"`
 	MessageID            int     `json:"message_id"`
 }
 
+// UnpinChatMessage unpins a message in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unpinchatmessage
 func (api *API) UnpinChatMessage(params UnpinChatMessageP) (bool, error) {
-	req := NewRequest[bool]("unpinChatMessage", params)
+	req := NewRequestWithChatID[bool]("unpinChatMessage", params, params.ChatID)
 	return req.Do(api)
 }
 
+// UnpinAllChatMessagesP holds parameters for the unpinAllChatMessages method.
+// See https://core.telegram.org/bots/api#unpinallchatmessages
 type UnpinAllChatMessagesP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// UnpinAllChatMessages unpins all pinned messages in a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unpinallchatmessages
 func (api *API) UnpinAllChatMessages(params UnpinAllChatMessagesP) (bool, error) {
-	req := NewRequest[bool]("unpinAllChatMessages", params)
+	req := NewRequestWithChatID[bool]("unpinAllChatMessages", params, params.ChatID)
 	return req.Do(api)
 }
 
+// LeaveChatP holds parameters for the leaveChat method.
+// See https://core.telegram.org/bots/api#leavechat
 type LeaveChatP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// LeaveChat makes the bot leave a chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#leavechat
 func (api *API) LeaveChat(params LeaveChatP) (bool, error) {
-	req := NewRequest[bool]("leaveChatP", params)
+	req := NewRequestWithChatID[bool]("leaveChat", params, params.ChatID) // fixed method name
 	return req.Do(api)
 }
 
+// GetChatP holds parameters for the getChat method.
+// See https://core.telegram.org/bots/api#getchat
 type GetChatP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
-func (api *API) GetChatP(params GetChatP) (ChatFullInfo, error) {
-	req := NewRequest[ChatFullInfo]("getChatP", params)
+// GetChat gets up‑to‑date information about a chat.
+// See https://core.telegram.org/bots/api#getchat
+func (api *API) GetChat(params GetChatP) (ChatFullInfo, error) {
+	req := NewRequestWithChatID[ChatFullInfo]("getChat", params, params.ChatID) // fixed method name
 	return req.Do(api)
 }
 
+// GetChatAdministratorsP holds parameters for the getChatAdministrators method.
+// See https://core.telegram.org/bots/api#getchatadministrators
 type GetChatAdministratorsP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// GetChatAdministrators returns a list of administrators in a chat.
+// See https://core.telegram.org/bots/api#getchatadministrators
 func (api *API) GetChatAdministrators(params GetChatAdministratorsP) ([]ChatMember, error) {
-	req := NewRequest[[]ChatMember]("getChatAdministrators", params)
+	req := NewRequestWithChatID[[]ChatMember]("getChatAdministrators", params, params.ChatID)
 	return req.Do(api)
 }
 
+// GetChatMembersCountP holds parameters for the getChatMemberCount method.
+// See https://core.telegram.org/bots/api#getchatmembercount
 type GetChatMembersCountP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// GetChatMemberCount returns the number of members in a chat.
+// See https://core.telegram.org/bots/api#getchatmembercount
 func (api *API) GetChatMemberCount(params GetChatMembersCountP) (int, error) {
-	req := NewRequest[int]("getChatMemberCount", params)
+	req := NewRequestWithChatID[int]("getChatMemberCount", params, params.ChatID)
 	return req.Do(api)
 }
 
+// GetChatMemberP holds parameters for the getChatMember method.
+// See https://core.telegram.org/bots/api#getchatmember
 type GetChatMemberP struct {
-	ChatID int `json:"chat_id"`
-	UserID int `json:"user_id"`
+	ChatID int64 `json:"chat_id"`
+	UserID int64 `json:"user_id"`
 }
 
+// GetChatMember returns information about a member of a chat.
+// See https://core.telegram.org/bots/api#getchatmember
 func (api *API) GetChatMember(params GetChatMemberP) (ChatMember, error) {
-	req := NewRequest[ChatMember]("getChatMember", params)
+	req := NewRequestWithChatID[ChatMember]("getChatMember", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetChatStickerSetP holds parameters for the setChatStickerSet method.
+// See https://core.telegram.org/bots/api#setchatstickerset
 type SetChatStickerSetP struct {
-	ChatID         int    `json:"chat_id"`
+	ChatID         int64  `json:"chat_id"`
 	StickerSetName string `json:"sticker_set_name"`
 }
 
+// SetChatStickerSet associates a sticker set with a supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setchatstickerset
 func (api *API) SetChatStickerSet(params SetChatStickerSetP) (bool, error) {
-	req := NewRequest[bool]("setChatStickerSet", params)
+	req := NewRequestWithChatID[bool]("setChatStickerSet", params, params.ChatID)
 	return req.Do(api)
 }
 
+// DeleteChatStickerSetP holds parameters for the deleteChatStickerSet method.
+// See https://core.telegram.org/bots/api#deletechatstickerset
 type DeleteChatStickerSetP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// DeleteChatStickerSet deletes a sticker set from a supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletechatstickerset
 func (api *API) DeleteChatStickerSet(params DeleteChatStickerSetP) (bool, error) {
-	req := NewRequest[bool]("deleteChatStickerSet", params)
+	req := NewRequestWithChatID[bool]("deleteChatStickerSet", params, params.ChatID)
 	return req.Do(api)
 }
 
+// GetUserChatBoostsP holds parameters for the getUserChatBoosts method.
+// See https://core.telegram.org/bots/api#getuserchatboosts
 type GetUserChatBoostsP struct {
-	ChatID int `json:"chat_id"`
-	UserID int `json:"user_id"`
+	ChatID int64 `json:"chat_id"`
+	UserID int64 `json:"user_id"`
 }
 
+// GetUserChatBoosts returns the list of boosts a user has given to a chat.
+// See https://core.telegram.org/bots/api#getuserchatboosts
 func (api *API) GetUserChatBoosts(params GetUserChatBoostsP) (UserChatBoosts, error) {
-	req := NewRequest[UserChatBoosts]("getUserChatBoosts", params)
+	req := NewRequestWithChatID[UserChatBoosts]("getUserChatBoosts", params, params.ChatID)
 	return req.Do(api)
 }
 
+// GetChatGiftsP holds parameters for the getChatGifts method.
+// See https://core.telegram.org/bots/api#getchatgifts
 type GetChatGiftsP struct {
-	ChatID                      int    `json:"chat_id"`
+	ChatID                      int64  `json:"chat_id"`
 	ExcludeUnsaved              bool   `json:"exclude_unsaved,omitempty"`
 	ExcludeSaved                bool   `json:"exclude_saved,omitempty"`
 	ExcludeUnlimited            bool   `json:"exclude_unlimited,omitempty"`
@@ -362,7 +528,9 @@ type GetChatGiftsP struct {
 	Limit                       int    `json:"limit,omitempty"`
 }
 
+// GetChatGifts returns gifts owned by a chat.
+// See https://core.telegram.org/bots/api#getchatgifts
 func (api *API) GetChatGifts(params GetChatGiftsP) (OwnedGifts, error) {
-	req := NewRequest[OwnedGifts]("getChatGifts", params)
+	req := NewRequestWithChatID[OwnedGifts]("getChatGifts", params, params.ChatID)
 	return req.Do(api)
 }

tgapi/chat_types.go

@@ -1,7 +1,9 @@
 package tgapi
 
+// Chat represents a chat (private, group, supergroup, channel).
+// See https://core.telegram.org/bots/api#chat
 type Chat struct {
-	ID               int     `json:"id"`
+	ID               int64   `json:"id"`
 	Type             string  `json:"type"`
 	Title            *string `json:"title,omitempty"`
 	Username         *string `json:"username,omitempty"`
@@ -11,6 +13,7 @@ type Chat struct {
 	IsDirectMessages *bool   `json:"is_direct_messages,omitempty"`
 }
 
+// ChatType represents the type of a chat.
 type ChatType string
 
 const (
@@ -20,8 +23,10 @@ const (
 	ChatTypeChannel    ChatType = "channel"
 )
 
+// ChatFullInfo contains full information about a chat.
+// See https://core.telegram.org/bots/api#chatfullinfo
 type ChatFullInfo struct {
-	ID               int        `json:"id"`
+	ID               int64      `json:"id"`
 	Type             ChatType   `json:"type"`
 	Title            string     `json:"title"`
 	Username         string     `json:"username"`
@@ -73,7 +78,7 @@ type ChatFullInfo struct {
 	StickerSetName               *string `json:"sticker_set_name,omitempty"`
 	CanSetStickerSet             *bool   `json:"can_set_sticker_set,omitempty"`
 	CustomEmojiStickerSetName    *string `json:"custom_emoji_sticker_set_name,omitempty"`
-	LinkedChatID                 *int    `json:"linked_chat_id,omitempty"`
+	LinkedChatID                 *int64  `json:"linked_chat_id,omitempty"`
 
 	Location             *ChatLocation     `json:"location,omitempty"`
 	Rating               *UserRating       `json:"rating,omitempty"`
@@ -82,6 +87,8 @@ type ChatFullInfo struct {
 	PaidMessageStarCount *int              `json:"paid_message_star_count,omitempty"`
 }
 
+// ChatPhoto represents a chat photo.
+// See https://core.telegram.org/bots/api#chatphoto
 type ChatPhoto struct {
 	SmallFileID       string `json:"small_file_id"`
 	SmallFileUniqueID string `json:"small_file_unique_id"`
@@ -89,6 +96,8 @@ type ChatPhoto struct {
 	BigFileUniqueID   string `json:"big_file_unique_id"`
 }
 
+// ChatPermissions describes actions that a non‑administrator user is allowed to take in a chat.
+// See https://core.telegram.org/bots/api#chatpermissions
 type ChatPermissions struct {
 	CanSendMessages      bool `json:"can_send_messages"`
 	CanSendAudios        bool `json:"can_send_audios"`
@@ -99,20 +108,26 @@ type ChatPermissions struct {
 	CanSendPolls         bool `json:"can_send_polls"`
 	CanSendOtherMessages bool `json:"can_send_other_messages"`
 	CanAddWebPagePreview bool `json:"can_add_web_page_preview"`
-	CatEditTag           bool `json:"cat_edit_tag"`
+	CanEditTag           bool `json:"can_edit_tag"`
 	CanChangeInfo        bool `json:"can_change_info"`
 	CanInviteUsers       bool `json:"can_invite_users"`
 	CanPinMessages       bool `json:"can_pin_messages"`
 	CanManageTopics      bool `json:"can_manage_topics"`
 }
+
+// ChatLocation represents a location to which a chat is connected.
+// See https://core.telegram.org/bots/api#chatlocation
 type ChatLocation struct {
 	Location Location `json:"location"`
 	Address  string   `json:"address"`
 }
+
+// ChatInviteLink represents an invite link for a chat.
+// See https://core.telegram.org/bots/api#chatinvitelink
 type ChatInviteLink struct {
 	InviteLink        string `json:"invite_link"`
 	Creator           User   `json:"creator"`
-	CreateJoinRequest bool   `json:"create_join_request"`
+	CreateJoinRequest bool   `json:"creates_join_request"`
 	IsPrimary         bool   `json:"is_primary"`
 	IsRevoked         bool   `json:"is_revoked"`
 
@@ -124,6 +139,7 @@ type ChatInviteLink struct {
 	SubscriptionPrice       *int    `json:"subscription_price,omitempty"`
 }
 
+// ChatMemberStatusType indicates the status of a chat member.
 type ChatMemberStatusType string
 
 const (
@@ -135,6 +151,8 @@ const (
 	ChatMemberStatusBanned        ChatMemberStatusType = "kicked"
 )
 
+// ChatMember contains information about one member of a chat.
+// See https://core.telegram.org/bots/api#chatmember
 type ChatMember struct {
 	Status ChatMemberStatusType `json:"status"`
 	User   User                 `json:"user"`
@@ -181,6 +199,8 @@ type ChatMember struct {
 	CanEditTag           *bool `json:"can_edit_tag,omitempty"`
 }
 
+// ChatBoostSource describes the source of a chat boost.
+// See https://core.telegram.org/bots/api#chatboostsource
 type ChatBoostSource struct {
 	Source string `json:"source"`
 	User   User   `json:"user"`
@@ -191,16 +211,23 @@ type ChatBoostSource struct {
 	IsUnclaimed       *bool `json:"is_unclaimed,omitempty"`
 }
 
+// ChatBoost represents a boost added to a chat.
+// See https://core.telegram.org/bots/api#chatboost
 type ChatBoost struct {
 	BoostID        int             `json:"boost_id"`
 	AddDate        int             `json:"add_date"`
 	ExpirationDate int             `json:"expiration_date"`
 	Source         ChatBoostSource `json:"source"`
 }
+
+// UserChatBoosts represents a list of boosts a user has given to a chat.
+// See https://core.telegram.org/bots/api#userchatboosts
 type UserChatBoosts struct {
 	Boosts []ChatBoost `json:"boosts"`
 }
 
+// ChatAdministratorRights represents the rights of an administrator in a chat.
+// See https://core.telegram.org/bots/api#chatadministratorrights
 type ChatAdministratorRights struct {
 	IsAnonymous         bool `json:"is_anonymous"`
 	CanManageChat       bool `json:"can_manage_chat"`
@@ -222,11 +249,15 @@ type ChatAdministratorRights struct {
 	CanManageTags           *bool `json:"can_manage_tags,omitempty"`
 }
 
+// ChatBoostUpdated represents a boost added to a chat or changed.
+// See https://core.telegram.org/bots/api#chatboostupdated
 type ChatBoostUpdated struct {
 	Chat  Chat      `json:"chat"`
 	Boost ChatBoost `json:"boost"`
 }
 
+// ChatBoostRemoved represents a boost removed from a chat.
+// See https://core.telegram.org/bots/api#chatboostremoved
 type ChatBoostRemoved struct {
 	Chat       Chat            `json:"chat"`
 	BoostID    string          `json:"boost_id"`

tgapi/errors.go

@@ -0,0 +1,8 @@
+package tgapi
+
+import "errors"
+
+var ErrRateLimit = errors.New("rate limit exceeded")
+var ErrPoolUnexpected = errors.New("unexpected response from pool")
+var ErrPoolQueueFull = errors.New("worker pool queue full")
+var ErrPoolStopped = errors.New("worker pool stopped")

tgapi/forum_methods.go

@@ -1,86 +1,139 @@
 package tgapi
 
+// BaseForumTopicP contains common fields for forum topic operations that require a chat ID and a message thread ID.
 type BaseForumTopicP struct {
-	ChatID          int `json:"chat_id"`
-	MessageThreadID int `json:"message_thread_id"`
+	ChatID          int64 `json:"chat_id"`
+	MessageThreadID int   `json:"message_thread_id"`
 }
 
-func (api *API) GetForumTopicIconSet() ([]Sticker, error) {
-	req := NewRequest[[]Sticker]("getForumTopicIconSet", NoParams)
+// GetForumTopicIconStickers returns the list of custom emoji that can be used as a forum topic icon.
+// See https://core.telegram.org/bots/api#getforumtopiciconstickers
+func (api *API) GetForumTopicIconStickers() ([]Sticker, error) {
+	req := NewRequest[[]Sticker]("getForumTopicIconStickers", NoParams)
 	return req.Do(api)
 }
 
+// CreateForumTopicP holds parameters for the createForumTopic method.
+// See https://core.telegram.org/bots/api#createforumtopic
 type CreateForumTopicP struct {
-	ChatID            int                 `json:"chat_id"`
+	ChatID            int64               `json:"chat_id"`
 	Name              string              `json:"name"`
 	IconColor         ForumTopicIconColor `json:"icon_color"`
 	IconCustomEmojiID string              `json:"icon_custom_emoji_id"`
 }
 
+// CreateForumTopic creates a topic in a forum supergroup.
+// Returns the created ForumTopic on success.
+// See https://core.telegram.org/bots/api#createforumtopic
 func (api *API) CreateForumTopic(params CreateForumTopicP) (ForumTopic, error) {
-	req := NewRequest[ForumTopic]("createForumTopic", params)
+	req := NewRequestWithChatID[ForumTopic]("createForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
 
+// EditForumTopicP holds parameters for the editForumTopic method.
+// See https://core.telegram.org/bots/api#editforumtopic
 type EditForumTopicP struct {
 	BaseForumTopicP
 	Name              string `json:"name"`
 	IconCustomEmojiID string `json:"icon_custom_emoji_id"`
 }
 
+// EditForumTopic edits name and icon of a forum topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#editforumtopic
 func (api *API) EditForumTopic(params EditForumTopicP) (bool, error) {
-	req := NewRequest[bool]("editForumTopic", params)
+	req := NewRequestWithChatID[bool]("editForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
 
+// CloseForumTopic closes an open forum topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#closeforumtopic
 func (api *API) CloseForumTopic(params BaseForumTopicP) (bool, error) {
-	req := NewRequest[bool]("closeForumTopic", params)
+	req := NewRequestWithChatID[bool]("closeForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// ReopenForumTopic reopens a closed forum topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#reopenforumtopic
 func (api *API) ReopenForumTopic(params BaseForumTopicP) (bool, error) {
-	req := NewRequest[bool]("reopenForumTopic", params)
+	req := NewRequestWithChatID[bool]("reopenForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// DeleteForumTopic deletes a forum topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deleteforumtopic
 func (api *API) DeleteForumTopic(params BaseForumTopicP) (bool, error) {
-	req := NewRequest[bool]("deleteForumTopic", params)
+	req := NewRequestWithChatID[bool]("deleteForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// UnpinAllForumTopicMessages clears the list of pinned messages in a forum topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unpinallforumtopicmessages
 func (api *API) UnpinAllForumTopicMessages(params BaseForumTopicP) (bool, error) {
-	req := NewRequest[bool]("unpinAllForumTopicMessages", params)
+	req := NewRequestWithChatID[bool]("unpinAllForumTopicMessages", params, params.ChatID)
 	return req.Do(api)
 }
 
+// BaseGeneralForumTopicP contains common fields for general forum topic operations that require a chat ID.
 type BaseGeneralForumTopicP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
+// EditGeneralForumTopicP holds parameters for the editGeneralForumTopic method.
+// See https://core.telegram.org/bots/api#editgeneralforumtopic
 type EditGeneralForumTopicP struct {
-	ChatID int    `json:"chat_id"`
+	ChatID int64  `json:"chat_id"`
 	Name   string `json:"name"`
 }
 
+// EditGeneralForumTopic edits the name of the 'General' topic in a forum supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#editgeneralforumtopic
 func (api *API) EditGeneralForumTopic(params EditGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("editGeneralForumTopic", params)
+	req := NewRequestWithChatID[bool]("editGeneralForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
 
+// CloseGeneralForumTopic closes the 'General' topic in a forum supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#closegeneralforumtopic
 func (api *API) CloseGeneralForumTopic(params BaseGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("closeGeneralForumTopic", params)
+	req := NewRequestWithChatID[bool]("closeGeneralForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// ReopenGeneralForumTopic reopens the 'General' topic in a forum supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#reopengeneralforumtopic
 func (api *API) ReopenGeneralForumTopic(params BaseGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("reopenGeneralForumTopic", params)
+	req := NewRequestWithChatID[bool]("reopenGeneralForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// HideGeneralForumTopic hides the 'General' topic in a forum supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#hidegeneralforumtopic
 func (api *API) HideGeneralForumTopic(params BaseGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("hideGeneralForumTopic", params)
+	req := NewRequestWithChatID[bool]("hideGeneralForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// UnhideGeneralForumTopic unhides the 'General' topic in a forum supergroup.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unhidegeneralforumtopic
 func (api *API) UnhideGeneralForumTopic(params BaseGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("unhideGeneralForumTopic", params)
+	req := NewRequestWithChatID[bool]("unhideGeneralForumTopic", params, params.ChatID)
 	return req.Do(api)
 }
+
+// UnpinAllGeneralForumTopicMessages clears the list of pinned messages in the 'General' topic.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#unpinallgeneralforumtopicmessages
 func (api *API) UnpinAllGeneralForumTopicMessages(params BaseGeneralForumTopicP) (bool, error) {
-	req := NewRequest[bool]("unpinAllGeneralForumTopicMessages", params)
+	req := NewRequestWithChatID[bool]("unpinAllGeneralForumTopicMessages", params, params.ChatID)
 	return req.Do(api)
 }

tgapi/forum_types.go

@@ -1,5 +1,7 @@
 package tgapi
 
+// ForumTopic represents a forum topic.
+// See https://core.telegram.org/bots/api#forumtopic
 type ForumTopic struct {
 	MessageThreadID   int    `json:"message_thread_id"`
 	Name              string `json:"name"`
@@ -8,8 +10,12 @@ type ForumTopic struct {
 	IsNameImplicit    bool   `json:"is_name_implicit,omitempty"`
 }
 
+// ForumTopicIconColor represents the color of a forum topic icon.
+// The value is an integer representing the color in RGB format.
+// See https://core.telegram.org/bots/api#forumtopiciconcolor
 type ForumTopicIconColor int
 
 const (
+	// ForumTopicIconColorBlue is the blue color for forum topic icons (value 7322096).
 	ForumTopicIconColorBlue ForumTopicIconColor = 7322096
 )

tgapi/games_methods.go

@@ -0,0 +1,69 @@
+package tgapi
+
+// SendGameP holds parameters for the sendGame method.
+// See https://core.telegram.org/bots/api#sendgame
+type SendGameP struct {
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	ChatID               int64  `json:"chat_id"`
+	MessageThreadID      int    `json:"message_thread_id,omitempty"`
+
+	GameShortName string `json:"game_short_name"`
+
+	DisableNotification bool                  `json:"disable_notification,omitempty"`
+	ProtectContent      bool                  `json:"protect_content,omitempty"`
+	AllowPaidBroadcast  bool                  `json:"allow_paid_broadcast,omitempty"`
+	MessageEffectID     string                `json:"message_effect_id,omitempty"`
+	ReplyParameters     *ReplyParameters      `json:"reply_parameters,omitempty"`
+	ReplyMarkup         *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
+}
+
+// SendGame sends a game message.
+// See https://core.telegram.org/bots/api#sendgame
+func (api *API) SendGame(params SendGameP) (Message, error) {
+	req := NewRequestWithChatID[Message]("sendGame", params, params.ChatID)
+	return req.Do(api)
+}
+
+// SetGameScoreP holds parameters for the setGameScore method.
+// See https://core.telegram.org/bots/api#setgamescore
+type SetGameScoreP struct {
+	UserID             int64  `json:"user_id"`
+	Score              int    `json:"score"`
+	Force              bool   `json:"force,omitempty"`
+	DisableEditMessage bool   `json:"disable_edit_message,omitempty"`
+	ChatID             int64  `json:"chat_id,omitempty"`
+	MessageID          int    `json:"message_id,omitempty"`
+	InlineMessageID    string `json:"inline_message_id,omitempty"`
+}
+
+// SetGameScore sets a user's score in a game message.
+// If inline_message_id is provided, returns a boolean success flag.
+// Otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#setgamescore
+func (api *API) SetGameScore(params SetGameScoreP) (Message, bool, error) {
+	var zero Message
+	if params.InlineMessageID != "" {
+		req := NewRequestWithChatID[bool]("setGameScore", params, params.ChatID)
+		res, err := req.Do(api)
+		return zero, res, err
+	}
+	req := NewRequestWithChatID[Message]("setGameScore", params, params.ChatID)
+	res, err := req.Do(api)
+	return res, false, err
+}
+
+// GetGameHighScoresP holds parameters for the getGameHighScores method.
+// See https://core.telegram.org/bots/api#getgamehighscores
+type GetGameHighScoresP struct {
+	UserID          int64  `json:"user_id"`
+	ChatID          int64  `json:"chat_id,omitempty"`
+	MessageID       int    `json:"message_id,omitempty"`
+	InlineMessageID string `json:"inline_message_id,omitempty"`
+}
+
+// GetGameHighScores returns game high score data for a user.
+// See https://core.telegram.org/bots/api#getgamehighscores
+func (api *API) GetGameHighScores(params GetGameHighScoresP) ([]GameHighScore, error) {
+	req := NewRequestWithChatID[[]GameHighScore]("getGameHighScores", params, params.ChatID)
+	return req.Do(api)
+}

tgapi/games_types.go

@@ -0,0 +1,9 @@
+package tgapi
+
+// GameHighScore represents one row in a game high score table.
+// See https://core.telegram.org/bots/api#gamehighscore
+type GameHighScore struct {
+	Position int  `json:"position"`
+	User     User `json:"user"`
+	Score    int  `json:"score"`
+}

tgapi/inline_methods.go

@@ -0,0 +1,52 @@
+package tgapi
+
+// AnswerInlineQueryP holds parameters for the answerInlineQuery method.
+// See https://core.telegram.org/bots/api#answerinlinequery
+type AnswerInlineQueryP struct {
+	InlineQueryID string                    `json:"inline_query_id"`
+	Results       []InlineQueryResult       `json:"results"`
+	CacheTime     int                       `json:"cache_time,omitempty"`
+	IsPersonal    bool                      `json:"is_personal,omitempty"`
+	NextOffset    string                    `json:"next_offset,omitempty"`
+	Button        *InlineQueryResultsButton `json:"button,omitempty"`
+}
+
+// AnswerInlineQuery sends answers to an inline query.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#answerinlinequery
+func (api *API) AnswerInlineQuery(params AnswerInlineQueryP) (bool, error) {
+	req := NewRequest[bool]("answerInlineQuery", params)
+	return req.Do(api)
+}
+
+// AnswerWebAppQueryP holds parameters for the answerWebAppQuery method.
+// See https://core.telegram.org/bots/api#answerwebappquery
+type AnswerWebAppQueryP struct {
+	WebAppQueryID string            `json:"web_app_query_id"`
+	Result        InlineQueryResult `json:"result"`
+}
+
+// AnswerWebAppQuery sets the result of a Web App interaction.
+// See https://core.telegram.org/bots/api#answerwebappquery
+func (api *API) AnswerWebAppQuery(params AnswerWebAppQueryP) (SentWebAppMessage, error) {
+	req := NewRequest[SentWebAppMessage]("answerWebAppQuery", params)
+	return req.Do(api)
+}
+
+// SavePreparedInlineMessageP holds parameters for the savePreparedInlineMessage method.
+// See https://core.telegram.org/bots/api#savepreparedinlinemessage
+type SavePreparedInlineMessageP struct {
+	UserID            int64             `json:"user_id"`
+	Result            InlineQueryResult `json:"result"`
+	AllowUserChats    bool              `json:"allow_user_chats,omitempty"`
+	AllowBotChats     bool              `json:"allow_bot_chats,omitempty"`
+	AllowGroupChats   bool              `json:"allow_group_chats,omitempty"`
+	AllowChannelChats bool              `json:"allow_channel_chats,omitempty"`
+}
+
+// SavePreparedInlineMessage stores a prepared message for Mini App users.
+// See https://core.telegram.org/bots/api#savepreparedinlinemessage
+func (api *API) SavePreparedInlineMessage(params SavePreparedInlineMessageP) (PreparedInlineMessage, error) {
+	req := NewRequest[PreparedInlineMessage]("savePreparedInlineMessage", params)
+	return req.Do(api)
+}

tgapi/inline_types.go

@@ -0,0 +1,26 @@
+package tgapi
+
+// InlineQueryResult is a JSON-serializable inline query result object.
+// See https://core.telegram.org/bots/api#inlinequeryresult
+type InlineQueryResult map[string]any
+
+// InlineQueryResultsButton represents a button shown above inline query results.
+// See https://core.telegram.org/bots/api#inlinequeryresultsbutton
+type InlineQueryResultsButton struct {
+	Text           string      `json:"text"`
+	WebApp         *WebAppInfo `json:"web_app,omitempty"`
+	StartParameter string      `json:"start_parameter,omitempty"`
+}
+
+// SentWebAppMessage describes an inline message sent by a Web App on behalf of a user.
+// See https://core.telegram.org/bots/api#sentwebappmessage
+type SentWebAppMessage struct {
+	InlineMessageID string `json:"inline_message_id,omitempty"`
+}
+
+// PreparedInlineMessage describes a prepared inline message.
+// See https://core.telegram.org/bots/api#preparedinlinemessage
+type PreparedInlineMessage struct {
+	ID             string `json:"id"`
+	ExpirationDate int    `json:"expiration_date"`
+}

tgapi/messages_methods.go

@@ -1,16 +1,18 @@
 package tgapi
 
+// SendMessageP holds parameters for the sendMessage method.
+// See https://core.telegram.org/bots/api#sendmessage
 type SendMessageP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+	DirectMessagesTopicID int64  `json:"direct_messages_topic_id,omitempty"`
 
 	Text                 string              `json:"text"`
 	ParseMode            ParseMode           `json:"parse_mode,omitempty"`
 	Entities             []MessageEntity     `json:"entities,omitempty"`
 	LinkPreviewOptions   *LinkPreviewOptions `json:"link_preview_options,omitempty"`
-	DisableNotifications bool                `json:"disable_notifications,omitempty"`
+	DisableNotifications bool                `json:"disable_notification,omitempty"`
 	ProtectContent       bool                `json:"protect_content,omitempty"`
 	AllowPaidBroadcast   bool                `json:"allow_paid_broadcast,omitempty"`
 	MessageEffectID      string              `json:"message_effect_id,omitempty"`
@@ -20,53 +22,66 @@ type SendMessageP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendMessage sends a text message.
+// See https://core.telegram.org/bots/api#sendmessage
 func (api *API) SendMessage(params SendMessageP) (Message, error) {
-	req := NewRequest[Message, SendMessageP]("sendMessage", params)
+	req := NewRequestWithChatID[Message, SendMessageP]("sendMessage", params, params.ChatID)
 	return req.Do(api)
 }
 
+// ForwardMessageP holds parameters for the forwardMessage method.
+// See https://core.telegram.org/bots/api#forwardmessage
 type ForwardMessageP struct {
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	ChatID                int64 `json:"chat_id"`
+	MessageThreadID       int   `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int   `json:"direct_messages_topic_id,omitempty"`
 
-	MessageID           int  `json:"message_id,omitempty"`
-	FromChatID          int  `json:"from_chat_id,omitempty"`
-	VideoStartTimestamp int  `json:"video_start_timestamp,omitempty"`
-	DisableNotification bool `json:"disable_notification,omitempty"`
-	ProtectContent      bool `json:"protect_content,omitempty"`
+	MessageID           int   `json:"message_id,omitempty"`
+	FromChatID          int64 `json:"from_chat_id,omitempty"`
+	VideoStartTimestamp int   `json:"video_start_timestamp,omitempty"`
+	DisableNotification bool  `json:"disable_notification,omitempty"`
+	ProtectContent      bool  `json:"protect_content,omitempty"`
 
 	MessageEffectID         string                   `json:"message_effect_id,omitempty"`
 	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
 }
 
+// ForwardMessage forwards a message.
+// See https://core.telegram.org/bots/api#forwardmessage
 func (api *API) ForwardMessage(params ForwardMessageP) (Message, error) {
-	req := NewRequest[Message]("forwardMessage", params)
+	req := NewRequestWithChatID[Message]("forwardMessage", params, params.ChatID)
 	return req.Do(api)
 }
 
+// ForwardMessagesP holds parameters for the forwardMessages method.
+// See https://core.telegram.org/bots/api#forwardmessages
 type ForwardMessagesP struct {
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	ChatID                int64 `json:"chat_id"`
+	MessageThreadID       int   `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int   `json:"direct_messages_topic_id,omitempty"`
 
-	FromChatID          int   `json:"from_chat_id,omitempty"`
+	FromChatID          int64 `json:"from_chat_id,omitempty"`
 	MessageIDs          []int `json:"message_ids,omitempty"`
 	DisableNotification bool  `json:"disable_notification,omitempty"`
 	ProtectContent      bool  `json:"protect_content,omitempty"`
 }
 
-func (api *API) ForwardMessages(params ForwardMessagesP) ([]int, error) {
-	req := NewRequest[[]int]("forwardMessages", params)
+// ForwardMessages forwards multiple messages.
+// Returns an array of message IDs of the sent messages.
+// See https://core.telegram.org/bots/api#forwardmessages
+func (api *API) ForwardMessages(params ForwardMessagesP) ([]MessageID, error) {
+	req := NewRequestWithChatID[[]MessageID]("forwardMessages", params, params.ChatID)
 	return req.Do(api)
 }
 
+// CopyMessageP holds parameters for the copyMessage method.
+// See https://core.telegram.org/bots/api#copymessage
 type CopyMessageP struct {
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	ChatID                int64 `json:"chat_id"`
+	MessageThreadID       int   `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int   `json:"direct_messages_topic_id,omitempty"`
 
-	FromChatID          int       `json:"from_chat_id"`
+	FromChatID          int64     `json:"from_chat_id"`
 	MessageID           int       `json:"message_id"`
 	VideoStartTimestamp int       `json:"video_start_timestamp,omitempty"`
 	Caption             string    `json:"caption,omitempty"`
@@ -84,33 +99,46 @@ type CopyMessageP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// CopyMessage copies a message.
+// Returns the MessageID of the sent copy.
+// See https://core.telegram.org/bots/api#copymessage
 func (api *API) CopyMessage(params CopyMessageP) (int, error) {
-	req := NewRequest[int]("copyMessage", params)
-	return req.Do(api)
+	msgID, err := NewRequestWithChatID[MessageID]("copyMessage", params, params.ChatID).Do(api)
+	if err != nil {
+		return 0, err
+	}
+	return msgID.MessageID, nil
 }
 
+// CopyMessagesP holds parameters for the copyMessages method.
+// See https://core.telegram.org/bots/api#copymessages
 type CopyMessagesP struct {
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	ChatID                int64 `json:"chat_id"`
+	MessageThreadID       int   `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int   `json:"direct_messages_topic_id,omitempty"`
 
-	FromChatID          int   `json:"from_chat_id,omitempty"`
+	FromChatID          int64 `json:"from_chat_id,omitempty"`
 	MessageIDs          []int `json:"message_ids,omitempty"`
 	DisableNotification bool  `json:"disable_notification,omitempty"`
 	ProtectContent      bool  `json:"protect_content,omitempty"`
 	RemoveCaption       bool  `json:"remove_caption,omitempty"`
 }
 
-func (api *API) CopyMessages(params CopyMessagesP) ([]int, error) {
-	req := NewRequest[[]int]("copyMessages", params)
+// CopyMessages copies multiple messages.
+// Returns an array of message IDs of the sent copies.
+// See https://core.telegram.org/bots/api#copymessages
+func (api *API) CopyMessages(params CopyMessagesP) ([]MessageID, error) {
+	req := NewRequestWithChatID[[]MessageID]("copyMessages", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendLocationP holds parameters for the sendLocation method.
+// See https://core.telegram.org/bots/api#sendlocation
 type SendLocationP struct {
-	BusinessConnectionID  int `json:"business_connection_id,omitempty"`
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
+	ChatID                int64  `json:"chat_id"`
+	MessageThreadID       int    `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
 	Latitude             float64 `json:"latitude"`
 	Longitude            float64 `json:"longitude"`
@@ -129,16 +157,20 @@ type SendLocationP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendLocation sends a point on the map.
+// See https://core.telegram.org/bots/api#sendlocation
 func (api *API) SendLocation(params SendLocationP) (Message, error) {
-	req := NewRequest[Message]("sendLocation", params)
+	req := NewRequestWithChatID[Message]("sendLocation", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendVenueP holds parameters for the sendVenue method.
+// See https://core.telegram.org/bots/api#sendvenue
 type SendVenueP struct {
-	BusinessConnectionID  int `json:"business_connection_id,omitempty"`
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
+	ChatID                int64  `json:"chat_id"`
+	MessageThreadID       int    `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
 	Latitude        float64 `json:"latitude"`
 	Longitude       float64 `json:"longitude"`
@@ -159,16 +191,20 @@ type SendVenueP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendVenue sends information about a venue.
+// See https://core.telegram.org/bots/api#sendvenue
 func (api *API) SendVenue(params SendVenueP) (Message, error) {
-	req := NewRequest[Message]("sendVenue", params)
+	req := NewRequestWithChatID[Message]("sendVenue", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendContactP holds parameters for the sendContact method.
+// See https://core.telegram.org/bots/api#sendcontact
 type SendContactP struct {
-	BusinessConnectionID  int `json:"business_connection_id,omitempty"`
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
+	ChatID                int64  `json:"chat_id"`
+	MessageThreadID       int    `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
 	PhoneNumber string `json:"phone_number"`
 	FirstName   string `json:"first_name"`
@@ -185,18 +221,22 @@ type SendContactP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendContact sends a phone contact.
+// See https://core.telegram.org/bots/api#sendcontact
 func (api *API) SendContact(params SendContactP) (Message, error) {
-	req := NewRequest[Message]("sendContact", params)
+	req := NewRequestWithChatID[Message]("sendContact", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendPollP holds parameters for the sendPoll method.
+// See https://core.telegram.org/bots/api#sendpoll
 type SendPollP struct {
-	BusinessConnectionID int `json:"business_connection_id,omitempty"`
-	ChatID               int `json:"chat_id"`
-	MessageThreadID      int `json:"message_thread_id,omitempty"`
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+	ChatID               int64  `json:"chat_id"`
+	MessageThreadID      int    `json:"message_thread_id,omitempty"`
 
 	Question              string            `json:"question"`
-	QuestionParseMode     ParseMode         `json:"question_mode,omitempty"`
+	QuestionParseMode     ParseMode         `json:"question_parse_mode,omitempty"`
 	QuestionEntities      []MessageEntity   `json:"question_entities,omitempty"`
 	Options               []InputPollOption `json:"options"`
 	IsAnonymous           bool              `json:"is_anonymous,omitempty"`
@@ -219,14 +259,18 @@ type SendPollP struct {
 	ReplyMarkup     *ReplyMarkup     `json:"reply_markup,omitempty"`
 }
 
+// SendPoll sends a native poll.
+// See https://core.telegram.org/bots/api#sendpoll
 func (api *API) SendPoll(params SendPollP) (Message, error) {
-	req := NewRequest[Message]("sendPoll", params)
+	req := NewRequestWithChatID[Message]("sendPoll", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendChecklistP holds parameters for the sendChecklist method.
+// See https://core.telegram.org/bots/api#sendchecklist
 type SendChecklistP struct {
-	BusinessConnectionID int            `json:"business_connection_id"`
-	ChatID               int            `json:"chat_id"`
+	BusinessConnectionID string         `json:"business_connection_id"`
+	ChatID               int64          `json:"chat_id"`
 	Checklist            InputChecklist `json:"checklist"`
 
 	DisableNotification bool   `json:"disable_notification,omitempty"`
@@ -237,16 +281,20 @@ type SendChecklistP struct {
 	ReplyMarkup     *ReplyMarkup     `json:"reply_markup,omitempty"`
 }
 
+// SendChecklist sends a checklist.
+// See https://core.telegram.org/bots/api#sendchecklist
 func (api *API) SendChecklist(params SendChecklistP) (Message, error) {
-	req := NewRequest[Message]("sendChecklist", params)
+	req := NewRequestWithChatID[Message]("sendChecklist", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendDiceP holds parameters for the sendDice method.
+// See https://core.telegram.org/bots/api#senddice
 type SendDiceP struct {
-	BusinessConnectionID  int `json:"business_connection_id,omitempty"`
-	ChatID                int `json:"chat_id"`
-	MessageThreadID       int `json:"message_thread_id,omitempty"`
-	DirectMessagesTopicID int `json:"direct_messages_topic_id,omitempty"`
+	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
+	ChatID                int64  `json:"chat_id"`
+	MessageThreadID       int    `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
 	Emoji string `json:"emoji,omitempty"`
 
@@ -260,13 +308,17 @@ type SendDiceP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
+// SendDice sends a dice, which will have a random value.
+// See https://core.telegram.org/bots/api#senddice
 func (api *API) SendDice(params SendDiceP) (Message, error) {
-	req := NewRequest[Message]("sendDice", params)
+	req := NewRequestWithChatID[Message]("sendDice", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendMessageDraftP holds parameters for the sendMessageDraft method.
+// See https://core.telegram.org/bots/api#sendmessagedraft
 type SendMessageDraftP struct {
-	ChatID          int             `json:"chat_id"`
+	ChatID          int64           `json:"chat_id"`
 	MessageThreadID int             `json:"message_thread_id,omitempty"`
 	DraftID         uint64          `json:"draft_id"`
 	Text            string          `json:"text"`
@@ -274,40 +326,53 @@ type SendMessageDraftP struct {
 	Entities        []MessageEntity `json:"entities,omitempty"`
 }
 
+// SendMessageDraft sends or updates a draft message in the target chat.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#sendmessagedraft
 func (api *API) SendMessageDraft(params SendMessageDraftP) (bool, error) {
-	req := NewRequest[bool]("sendMessageDraft", params)
+	req := NewRequestWithChatID[bool]("sendMessageDraft", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SendChatActionP holds parameters for the sendChatAction method.
+// See https://core.telegram.org/bots/api#sendchataction
 type SendChatActionP struct {
 	BusinessConnectionID string         `json:"business_connection_id,omitempty"`
-	ChatID               int            `json:"chat_id"`
+	ChatID               int64          `json:"chat_id"`
 	MessageThreadID      int            `json:"message_thread_id,omitempty"`
 	Action               ChatActionType `json:"action"`
 }
 
+// SendChatAction sends a chat action (typing, uploading photo, etc.).
+// Returns True on success.
+// See https://core.telegram.org/bots/api#sendchataction
 func (api *API) SendChatAction(params SendChatActionP) (bool, error) {
-	req := NewRequest[bool]("sendChatAction", params)
+	req := NewRequestWithChatID[bool]("sendChatAction", params, params.ChatID)
 	return req.Do(api)
 }
 
+// SetMessageReactionP holds parameters for the setMessageReaction method.
+// See https://core.telegram.org/bots/api#setmessagereaction
 type SetMessageReactionP struct {
-	ChatId    int            `json:"chat_id"`
+	ChatID    int64          `json:"chat_id"`
 	MessageId int            `json:"message_id"`
 	Reaction  []ReactionType `json:"reaction"`
 	IsBig     bool           `json:"is_big,omitempty"`
 }
 
+// SetMessageReaction changes the chosen reaction on a message.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setmessagereaction
 func (api *API) SetMessageReaction(params SetMessageReactionP) (bool, error) {
-	req := NewRequest[bool]("setMessageReaction", params)
+	req := NewRequestWithChatID[bool]("setMessageReaction", params, params.ChatID)
 	return req.Do(api)
 }
 
-// Message update methods
-
+// EditMessageTextP holds parameters for the editMessageText method.
+// See https://core.telegram.org/bots/api#editmessagetext
 type EditMessageTextP struct {
 	BusinessConnectionID string       `json:"business_connection_id,omitempty"`
-	ChatID               int          `json:"chat_id,omitempty"`
+	ChatID               int64        `json:"chat_id,omitempty"`
 	MessageID            int          `json:"message_id,omitempty"`
 	InlineMessageID      string       `json:"inline_message_id,omitempty"`
 	Text                 string       `json:"text"`
@@ -315,23 +380,27 @@ type EditMessageTextP struct {
 	ReplyMarkup          *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
-// EditMessageText If inline message, first return will be zero-valued, and second will boolean
-// Otherwise, first return will be Message, and second false
+// EditMessageText edits text messages.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#editmessagetext
 func (api *API) EditMessageText(params EditMessageTextP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("editMessageText", params)
+		req := NewRequestWithChatID[bool]("editMessageText", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("editMessageText", params)
+	req := NewRequestWithChatID[Message]("editMessageText", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// EditMessageCaptionP holds parameters for the editMessageCaption method.
+// See https://core.telegram.org/bots/api#editmessagecaption
 type EditMessageCaptionP struct {
 	BusinessConnectionID string       `json:"business_connection_id,omitempty"`
-	ChatID               int          `json:"chat_id,omitempty"`
+	ChatID               int64        `json:"chat_id,omitempty"`
 	MessageID            int          `json:"message_id,omitempty"`
 	InlineMessageID      string       `json:"inline_message_id,omitempty"`
 	Caption              string       `json:"caption"`
@@ -339,46 +408,54 @@ type EditMessageCaptionP struct {
 	ReplyMarkup          *ReplyMarkup `json:"reply_markup,omitempty"`
 }
 
-// EditMessageCaption If inline message, first return will be zero-valued, and second will boolean
-// Otherwise, first return will be Message, and second false
+// EditMessageCaption edits captions of messages.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#editmessagecaption
 func (api *API) EditMessageCaption(params EditMessageCaptionP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("editMessageCaption", params)
+		req := NewRequestWithChatID[bool]("editMessageCaption", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("editMessageCaption", params)
+	req := NewRequestWithChatID[Message]("editMessageCaption", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// EditMessageMediaP holds parameters for the editMessageMedia method.
+// See https://core.telegram.org/bots/api#editmessagemedia
 type EditMessageMediaP struct {
 	BusinessConnectionID string                `json:"business_connection_id,omitempty"`
-	ChatID               int                   `json:"chat_id,omitempty"`
+	ChatID               int64                 `json:"chat_id,omitempty"`
 	MessageID            int                   `json:"message_id,omitempty"`
 	InlineMessageID      string                `json:"inline_message_id,omitempty"`
-	Message              InputMedia            `json:"message"`
+	Media                InputMedia            `json:"media"`
 	ReplyMarkup          *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
-// EditMessageMedia If inline message, first return will be zero-valued, and second will boolean
-// Otherwise, first return will be Message, and second false
+// EditMessageMedia edits media messages.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#editmessagemedia
 func (api *API) EditMessageMedia(params EditMessageMediaP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("editMessageMedia", params)
+		req := NewRequestWithChatID[bool]("editMessageMedia", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("editMessageMedia", params)
+	req := NewRequestWithChatID[Message]("editMessageMedia", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// EditMessageLiveLocationP holds parameters for the editMessageLiveLocation method.
+// See https://core.telegram.org/bots/api#editmessagelivelocation
 type EditMessageLiveLocationP struct {
 	BusinessConnectionID string `json:"business_connection_id,omitempty"`
-	ChatID               int    `json:"chat_id,omitempty"`
+	ChatID               int64  `json:"chat_id,omitempty"`
 	MessageID            int    `json:"message_id,omitempty"`
 	InlineMessageID      string `json:"inline_message_id,omitempty"`
 
@@ -391,129 +468,171 @@ type EditMessageLiveLocationP struct {
 	ReplyMarkup          *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
-// EditMessageLiveLocation If inline message, first return will be zero-valued, and second will boolean
-// Otherwise, first return will be Message, and second false
+// EditMessageLiveLocation edits live location messages.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#editmessagelivelocation
 func (api *API) EditMessageLiveLocation(params EditMessageLiveLocationP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("editMessageLiveLocation", params)
+		req := NewRequestWithChatID[bool]("editMessageLiveLocation", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("editMessageLiveLocation", params)
+	req := NewRequestWithChatID[Message]("editMessageLiveLocation", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// StopMessageLiveLocationP holds parameters for the stopMessageLiveLocation method.
+// See https://core.telegram.org/bots/api#stopmessagelivelocation
 type StopMessageLiveLocationP struct {
 	BusinessConnectionID string                `json:"business_connection_id,omitempty"`
-	ChatID               int                   `json:"chat_id,omitempty"`
+	ChatID               int64                 `json:"chat_id,omitempty"`
 	MessageID            int                   `json:"message_id,omitempty"`
 	InlineMessageID      string                `json:"inline_message_id,omitempty"`
 	ReplyMarkup          *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
-// StopMessageLiveLocation If inline message, first return will be zero-valued, and second will boolean
-// Otherwise, first return will be Message, and second false
+// StopMessageLiveLocation stops a live location message.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#stopmessagelivelocation
 func (api *API) StopMessageLiveLocation(params StopMessageLiveLocationP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("stopMessageLiveLocation", params)
+		req := NewRequestWithChatID[bool]("stopMessageLiveLocation", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("stopMessageLiveLocation", params)
+	req := NewRequestWithChatID[Message]("stopMessageLiveLocation", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// EditMessageChecklistP holds parameters for the editMessageChecklist method.
 type EditMessageChecklistP struct {
 	BusinessConnectionID string                `json:"business_connection_id"`
-	ChatID               int                   `json:"chat_id"`
+	ChatID               int64                 `json:"chat_id"`
 	MessageID            int                   `json:"message_id"`
 	Checklist            InputChecklist        `json:"checklist"`
 	ReplyMarkup          *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
+// EditMessageChecklist edits a checklist message.
+// See https://core.telegram.org/bots/api#editmessagechecklist
 func (api *API) EditMessageChecklist(params EditMessageChecklistP) (Message, error) {
-	req := NewRequest[Message]("editMessageChecklist", params)
+	req := NewRequestWithChatID[Message]("editMessageChecklist", params, params.ChatID)
 	return req.Do(api)
 }
 
+// EditMessageReplyMarkupP holds parameters for the editMessageReplyMarkup method.
+// See https://core.telegram.org/bots/api#editmessagereplymarkup
 type EditMessageReplyMarkupP struct {
 	BusinessConnectionID string                `json:"business_connection_id,omitempty"`
-	ChatID               int                   `json:"chat_id,omitempty"`
+	ChatID               int64                 `json:"chat_id,omitempty"`
 	MessageID            int                   `json:"message_id,omitempty"`
 	InlineMessageID      string                `json:"inline_message_id,omitempty"`
 	ReplyMarkup          *InlineKeyboardMarkup `json:"reply_markup,omitempty"`
 }
 
+// EditMessageReplyMarkup edits only the reply markup of messages.
+// If inline_message_id is provided, returns a boolean success flag;
+// otherwise returns the edited Message.
+// See https://core.telegram.org/bots/api#editmessagereplymarkup
 func (api *API) EditMessageReplyMarkup(params EditMessageReplyMarkupP) (Message, bool, error) {
 	var zero Message
 	if params.InlineMessageID != "" {
-		req := NewRequest[bool]("editMessageReplyMarkup", params)
+		req := NewRequestWithChatID[bool]("editMessageReplyMarkup", params, params.ChatID)
 		res, err := req.Do(api)
 		return zero, res, err
 	}
-	req := NewRequest[Message]("editMessageReplyMarkup", params)
+	req := NewRequestWithChatID[Message]("editMessageReplyMarkup", params, params.ChatID)
 	res, err := req.Do(api)
 	return res, false, err
 }
 
+// StopPollP holds parameters for the stopPoll method.
+// See https://core.telegram.org/bots/api#stoppoll
 type StopPollP struct {
 	BusinessConnectionID string `json:"business_connection_id,omitempty"`
-	ChatID               int    `json:"chat_id"`
+	ChatID               int64  `json:"chat_id"`
 	MessageID            int    `json:"message_id"`
 	InlineMessageID      string `json:"inline_message_id,omitempty"`
 }
 
+// StopPoll stops a poll that was sent by the bot.
+// Returns the stopped Poll.
+// See https://core.telegram.org/bots/api#stoppoll
 func (api *API) StopPoll(params StopPollP) (Poll, error) {
-	req := NewRequest[Poll]("stopPoll", params)
+	req := NewRequestWithChatID[Poll]("stopPoll", params, params.ChatID)
 	return req.Do(api)
 }
 
+// ApproveSuggestedPostP holds parameters for the approveSuggestedPost method.
+// See https://core.telegram.org/bots/api#approvesuggestedpost
 type ApproveSuggestedPostP struct {
-	ChatID    int `json:"chat_id"`
-	MessageID int `json:"message_id"`
-	SendDate  int `json:"send_date,omitempty"`
+	ChatID    int64 `json:"chat_id"`
+	MessageID int   `json:"message_id"`
+	SendDate  int   `json:"send_date,omitempty"`
 }
 
+// ApproveSuggestedPost approves a suggested channel post.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#approvesuggestedpost
 func (api *API) ApproveSuggestedPost(params ApproveSuggestedPostP) (bool, error) {
-	req := NewRequest[bool]("approveSuggestedPost", params)
+	req := NewRequestWithChatID[bool]("approveSuggestedPost", params, params.ChatID)
 	return req.Do(api)
 }
 
+// DeclineSuggestedPostP holds parameters for the declineSuggestedPost method.
+// See https://core.telegram.org/bots/api#declinesuggestedpost
 type DeclineSuggestedPostP struct {
-	ChatID    int    `json:"chat_id"`
+	ChatID    int64  `json:"chat_id"`
 	MessageID int    `json:"message_id"`
 	Comment   string `json:"comment,omitempty"`
 }
 
+// DeclineSuggestedPost declines a suggested channel post.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#declinesuggestedpost
 func (api *API) DeclineSuggestedPost(params DeclineSuggestedPostP) (bool, error) {
-	req := NewRequest[bool]("declineSuggestedPost", params)
+	req := NewRequestWithChatID[bool]("declineSuggestedPost", params, params.ChatID)
 	return req.Do(api)
 }
 
+// DeleteMessageP holds parameters for the deleteMessage method.
+// See https://core.telegram.org/bots/api#deletemessage
 type DeleteMessageP struct {
-	ChatID    int `json:"chat_id"`
-	MessageID int `json:"message_id"`
+	ChatID    int64 `json:"chat_id"`
+	MessageID int   `json:"message_id"`
 }
 
+// DeleteMessage deletes a message.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletemessage
 func (api *API) DeleteMessage(params DeleteMessageP) (bool, error) {
-	req := NewRequest[bool]("deleteMessage", params)
+	req := NewRequestWithChatID[bool]("deleteMessage", params, params.ChatID)
 	return req.Do(api)
 }
 
+// DeleteMessagesP holds parameters for the deleteMessages method.
+// See https://core.telegram.org/bots/api#deletemessages
 type DeleteMessagesP struct {
-	ChatID     int   `json:"chat_id"`
+	ChatID     int64 `json:"chat_id"`
 	MessageIDs []int `json:"message_ids"`
 }
 
+// DeleteMessages deletes multiple messages at once.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletemessages
 func (api *API) DeleteMessages(params DeleteMessagesP) (bool, error) {
-	req := NewRequest[bool]("deleteMessages", params)
+	req := NewRequestWithChatID[bool]("deleteMessages", params, params.ChatID)
 	return req.Do(api)
 }
 
+// AnswerCallbackQueryP holds parameters for the answerCallbackQuery method.
+// See https://core.telegram.org/bots/api#answercallbackquery
 type AnswerCallbackQueryP struct {
 	CallbackQueryID string `json:"callback_query_id"`
 	Text            string `json:"text,omitempty"`
@@ -522,6 +641,9 @@ type AnswerCallbackQueryP struct {
 	CacheTime       int    `json:"cache_time,omitempty"`
 }
 
+// AnswerCallbackQuery sends answers to callback queries sent from inline keyboards.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#answercallbackquery
 func (api *API) AnswerCallbackQuery(params AnswerCallbackQueryP) (bool, error) {
 	req := NewRequest[bool]("answerCallbackQuery", params)
 	return req.Do(api)

tgapi/messages_types.go

@@ -2,15 +2,31 @@ package tgapi
 
 import "git.nix13.pw/scuroneko/extypes"
 
+// MessageID represents a message identifier wrapper returned by some API methods.
+type MessageID struct {
+	MessageID int `json:"message_id"`
+}
+
+// MessageReplyMarkup represents an inline keyboard markup for a message.
+// It is used in the Message type.
 type MessageReplyMarkup struct {
 	InlineKeyboard [][]InlineKeyboardButton `json:"inline_keyboard"`
 }
 
+// DirectMessageTopic represents a forum topic in a direct message.
+type DirectMessageTopic struct {
+	TopicID int64 `json:"topic_id"`
+	User    *User `json:"user,omitempty"`
+}
+
+// Message represents a Telegram message.
+// See https://core.telegram.org/bots/api#message
 type Message struct {
-	MessageID            int    `json:"message_id"`
-	MessageThreadID      int    `json:"message_thread_id,omitempty"`
-	BusinessConnectionId string `json:"business_connection_id,omitempty"`
-	From                 *User  `json:"from,omitempty"`
+	MessageID            int                 `json:"message_id"`
+	MessageThreadID      int                 `json:"message_thread_id,omitempty"`
+	DirectMessageTopic   *DirectMessageTopic `json:"direct_message_topic,omitempty"`
+	BusinessConnectionId string              `json:"business_connection_id,omitempty"`
+	From                 *User               `json:"from,omitempty"`
 
 	SenderChat        *Chat  `json:"sender_chat,omitempty"`
 	SenderBoostCount  int    `json:"sender_boost_count,omitempty"`
@@ -45,14 +61,19 @@ type Message struct {
 	EffectID string `json:"effect_id,omitempty"`
 }
 
+// InaccessibleMessage describes a message that was deleted or is otherwise inaccessible.
+// See https://core.telegram.org/bots/api#inaccessiblemessage
 type InaccessibleMessage struct {
 	Chat      Chat `json:"chat"`
 	MessageID int  `json:"message_id"`
 	Date      int  `json:"date"`
 }
 
+// MaybeInaccessibleMessage is a union type that can be either Message or InaccessibleMessage.
+// See https://core.telegram.org/bots/api#maybeinaccessiblemessage
 type MaybeInaccessibleMessage interface{ Message | InaccessibleMessage }
 
+// MessageEntityType represents the type of a message entity.
 type MessageEntityType string
 
 const (
@@ -78,6 +99,8 @@ const (
 	MessageEntityDateTime             MessageEntityType = "date_time"
 )
 
+// MessageEntity represents one special entity in a text message.
+// See https://core.telegram.org/bots/api#messageentity
 type MessageEntity struct {
 	Type MessageEntityType `json:"type"`
 
@@ -92,9 +115,11 @@ type MessageEntity struct {
 	DateTimeFormat string `json:"date_time_format,omitempty"`
 }
 
+// ReplyParameters describes the parameters to use when replying to a message.
+// See https://core.telegram.org/bots/api#replyparameters
 type ReplyParameters struct {
-	MessageID int `json:"message_id"`
-	ChatID    int `json:"chat_id,omitempty"`
+	MessageID int   `json:"message_id"`
+	ChatID    int64 `json:"chat_id,omitempty"`
 
 	AllowSendingWithoutReply bool             `json:"allow_sending_without_reply,omitempty"`
 	Quote                    string           `json:"quote,omitempty"`
@@ -104,6 +129,8 @@ type ReplyParameters struct {
 	ChecklistTaskID          int              `json:"checklist_task_id,omitempty"`
 }
 
+// LinkPreviewOptions describes the options used for link preview generation.
+// See https://core.telegram.org/bots/api#linkpreviewoptions
 type LinkPreviewOptions struct {
 	IsDisabled       bool   `json:"is_disabled,omitempty"`
 	URL              string `json:"url,omitempty"`
@@ -112,6 +139,8 @@ type LinkPreviewOptions struct {
 	ShowAboveText    bool   `json:"show_above_text,omitempty"`
 }
 
+// ReplyMarkup represents a custom keyboard or inline keyboard.
+// See https://core.telegram.org/bots/api#replymarkup
 type ReplyMarkup struct {
 	InlineKeyboard [][]InlineKeyboardButton `json:"inline_keyboard,omitempty"`
 
@@ -126,11 +155,18 @@ type ReplyMarkup struct {
 
 	ForceReply bool `json:"force_reply,omitempty"`
 }
+
+// InlineKeyboardMarkup represents an inline keyboard that appears right next to the message it belongs to.
+// See https://core.telegram.org/bots/api#inlinekeyboardmarkup
 type InlineKeyboardMarkup struct {
 	InlineKeyboard [][]InlineKeyboardButton `json:"inline_keyboard,omitempty"`
 }
 
+// KeyboardButtonStyle represents the style of a keyboard button.
 type KeyboardButtonStyle string
+
+// InlineKeyboardButton represents one button of an inline keyboard.
+// See https://core.telegram.org/bots/api#inlinekeyboardbutton
 type InlineKeyboardButton struct {
 	Text              string              `json:"text"`
 	URL               string              `json:"url,omitempty"`
@@ -139,23 +175,33 @@ type InlineKeyboardButton struct {
 	IconCustomEmojiID string              `json:"icon_custom_emoji_id,omitempty"`
 }
 
+// ReplyKeyboardMarkup represents a custom keyboard with reply options.
+// See https://core.telegram.org/bots/api#replykeyboardmarkup
 type ReplyKeyboardMarkup struct {
 	Keyboard [][]int `json:"keyboard"`
 }
 
+// CallbackQuery represents an incoming callback query from a callback button in an inline keyboard.
+// See https://core.telegram.org/bots/api#callbackquery
 type CallbackQuery struct {
-	ID      string  `json:"id"`
-	From    User    `json:"from"`
-	Message Message `json:"message"`
-
-	Data string `json:"data"`
+	ID              string   `json:"id"`
+	From            User     `json:"from"`
+	Message         *Message `json:"message,omitempty"`
+	InlineMessageID *string  `json:"inline_message_id,omitempty"`
+	ChatInstance    string   `json:"chat_instance,omitempty"`
+	Data            string   `json:"data,omitempty"`
+	GameShortName   string   `json:"game_short_name,omitempty"`
 }
 
+// InputPollOption contains information about one answer option in a poll to be sent.
+// See https://core.telegram.org/bots/api#inputpolloption
 type InputPollOption struct {
 	Text          string           `json:"text"`
 	TextParseMode ParseMode        `json:"text_parse_mode,omitempty"`
 	TextEntities  []*MessageEntity `json:"text_entities,omitempty"`
 }
+
+// PollType represents the type of a poll.
 type PollType string
 
 const (
@@ -163,12 +209,15 @@ const (
 	PollTypeQuiz    PollType = "quiz"
 )
 
+// InputChecklistTask describes a task in a checklist.
 type InputChecklistTask struct {
 	ID           int              `json:"id"`
 	Text         string           `json:"text"`
 	ParseMode    ParseMode        `json:"parse_mode,omitempty"`
 	TextEntities []*MessageEntity `json:"text_entities,omitempty"`
 }
+
+// InputChecklist represents a checklist to be sent.
 type InputChecklist struct {
 	Title                   string               `json:"title"`
 	ParseMode               ParseMode            `json:"parse_mode,omitempty"`
@@ -178,6 +227,7 @@ type InputChecklist struct {
 	OtherCanMarkTasksAsDone bool                 `json:"other_can_mark_tasks_as_done,omitempty"`
 }
 
+// ChatActionType represents the type of chat action.
 type ChatActionType string
 
 const (
@@ -191,6 +241,8 @@ const (
 	ChatActionUploadVideoNone ChatActionType = "upload_video_none"
 )
 
+// MessageReactionUpdated represents a change of a reaction on a message.
+// See https://core.telegram.org/bots/api#messagereactionupdated
 type MessageReactionUpdated struct {
 	Chat        *Chat          `json:"chat"`
 	MessageID   int            `json:"message_id"`
@@ -201,12 +253,17 @@ type MessageReactionUpdated struct {
 	NewReaction []ReactionType `json:"new_reaction"`
 }
 
+// MessageReactionCountUpdated represents a change in the count of reactions on a message.
+// See https://core.telegram.org/bots/api#messagereactioncountupdated
 type MessageReactionCountUpdated struct {
 	Chat      *Chat            `json:"chat"`
 	MessageID int              `json:"message_id"`
 	Date      int              `json:"date"`
 	Reactions []*ReactionCount `json:"reactions"`
 }
+
+// ReactionType describes the type of a reaction.
+// See https://core.telegram.org/bots/api#reactiontype
 type ReactionType struct {
 	Type string `json:"type"`
 	// ReactionTypeEmoji
@@ -214,20 +271,29 @@ type ReactionType struct {
 	// ReactionTypeCustomEmoji
 	CustomEmojiID *string `json:"custom_emoji_id,omitempty"`
 }
+
+// ReactionCount represents a reaction added to a message along with the number of times it was added.
+// See https://core.telegram.org/bots/api#reactioncount
 type ReactionCount struct {
 	Type       ReactionType `json:"type"`
 	TotalCount int          `json:"total_count"`
 }
 
+// SuggestedPostPrice represents the price of a suggested post.
 type SuggestedPostPrice struct {
 	Currency string `json:"currency"`
 	Amount   int    `json:"amount"`
 }
+
+// SuggestedPostInfo contains information about a suggested post.
+// See https://core.telegram.org/bots/api#suggestedpostinfo
 type SuggestedPostInfo struct {
-	State    string             `json:"state"` //State of the suggested post. Currently, it can be one of “pending”, “approved”, “declined”.
+	State    string             `json:"state"` // "pending", "approved", or "declined"
 	Price    SuggestedPostPrice `json:"price"`
 	SendDate int                `json:"send_date"`
 }
+
+// SuggestedPostParameters holds parameters for suggesting a post.
 type SuggestedPostParameters struct {
 	Price    SuggestedPostPrice `json:"price"`
 	SendDate int                `json:"send_date"`

tgapi/methods.go

@@ -6,18 +6,8 @@ import (
 	"net/http"
 )
 
-type ParseMode string
-
-const (
-	ParseMDV2 ParseMode = "MarkdownV2"
-	ParseHTML ParseMode = "HTML"
-	ParseMD   ParseMode = "Markdown"
-)
-
-type EmptyParams struct{}
-
-var NoParams = EmptyParams{}
-
+// UpdateParams holds parameters for the getUpdates method.
+// See https://core.telegram.org/bots/api#getupdates
 type UpdateParams struct {
 	Offset         *int         `json:"offset,omitempty"`
 	Limit          *int         `json:"limit,omitempty"`
@@ -25,38 +15,101 @@ type UpdateParams struct {
 	AllowedUpdates []UpdateType `json:"allowed_updates"`
 }
 
+// GetMe returns basic information about the bot.
+// See https://core.telegram.org/bots/api#getme
 func (api *API) GetMe() (User, error) {
 	req := NewRequest[User, EmptyParams]("getMe", NoParams)
 	return req.Do(api)
 }
+
+// LogOut logs the bot out from the cloud Bot API server.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#logout
 func (api *API) LogOut() (bool, error) {
 	req := NewRequest[bool, EmptyParams]("logOut", NoParams)
 	return req.Do(api)
 }
+
+// Close closes the bot instance on the local server.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#close
 func (api *API) Close() (bool, error) {
 	req := NewRequest[bool, EmptyParams]("close", NoParams)
 	return req.Do(api)
 }
+
+// GetUpdates receives incoming updates using long polling.
+// See https://core.telegram.org/bots/api#getupdates
 func (api *API) GetUpdates(params UpdateParams) ([]Update, error) {
 	req := NewRequest[[]Update]("getUpdates", params)
 	return req.Do(api)
 }
 
+// SetWebhookP holds parameters for the setWebhook method.
+// See https://core.telegram.org/bots/api#setwebhook
+type SetWebhookP struct {
+	URL                string       `json:"url"`
+	Certificate        string       `json:"certificate,omitempty"`
+	IPAddress          string       `json:"ip_address,omitempty"`
+	MaxConnections     int          `json:"max_connections,omitempty"`
+	AllowedUpdates     []UpdateType `json:"allowed_updates,omitempty"`
+	DropPendingUpdates bool         `json:"drop_pending_updates,omitempty"`
+	SecretToken        string       `json:"secret_token,omitempty"`
+}
+
+// SetWebhook sets a webhook URL for incoming updates.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setwebhook
+func (api *API) SetWebhook(params SetWebhookP) (bool, error) {
+	req := NewRequest[bool]("setWebhook", params)
+	return req.Do(api)
+}
+
+// DeleteWebhookP holds parameters for the deleteWebhook method.
+// See https://core.telegram.org/bots/api#deletewebhook
+type DeleteWebhookP struct {
+	DropPendingUpdates bool `json:"drop_pending_updates,omitempty"`
+}
+
+// DeleteWebhook removes the current webhook integration.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#deletewebhook
+func (api *API) DeleteWebhook(params DeleteWebhookP) (bool, error) {
+	req := NewRequest[bool]("deleteWebhook", params)
+	return req.Do(api)
+}
+
+// GetWebhookInfo returns the current webhook status.
+// See https://core.telegram.org/bots/api#getwebhookinfo
+func (api *API) GetWebhookInfo() (WebhookInfo, error) {
+	req := NewRequest[WebhookInfo]("getWebhookInfo", NoParams)
+	return req.Do(api)
+}
+
+// GetFileP holds parameters for the getFile method.
+// See https://core.telegram.org/bots/api#getfile
 type GetFileP struct {
 	FileId string `json:"file_id"`
 }
 
+// GetFile returns basic information about a file and prepares it for downloading.
+// See https://core.telegram.org/bots/api#getfile
 func (api *API) GetFile(params GetFileP) (File, error) {
 	req := NewRequest[File]("getFile", params)
 	return req.Do(api)
 }
 
+// GetFileByLink downloads a file from Telegram's file server using the provided file link.
+// The link is usually obtained from File.FilePath.
+// See https://core.telegram.org/bots/api#file
 func (api *API) GetFileByLink(link string) ([]byte, error) {
 	u := fmt.Sprintf("https://api.telegram.org/file/bot%s/%s", api.token, link)
 	res, err := http.Get(u)
 	if err != nil {
 		return nil, err
 	}
-	defer res.Body.Close()
+	defer func() {
+		_ = res.Body.Close()
+	}()
 	return io.ReadAll(res.Body)
 }

tgapi/methods_types.go

@@ -0,0 +1,35 @@
+package tgapi
+
+// ParseMode represents the text formatting mode for message parsing.
+type ParseMode string
+
+const (
+	// ParseMDV2 enables MarkdownV2 style parsing.
+	ParseMDV2 ParseMode = "MarkdownV2"
+	// ParseHTML enables HTML style parsing.
+	ParseHTML ParseMode = "HTML"
+	// ParseMD enables legacy Markdown style parsing.
+	ParseMD ParseMode = "Markdown"
+	// ParseNone disables any parsing.
+	ParseNone ParseMode = "None"
+)
+
+// EmptyParams is a placeholder for methods that take no parameters.
+type EmptyParams struct{}
+
+// NoParams is a convenient instance of EmptyParams.
+var NoParams = EmptyParams{}
+
+// WebhookInfo describes the current webhook status.
+// See https://core.telegram.org/bots/api#webhookinfo
+type WebhookInfo struct {
+	URL                          string   `json:"url"`
+	HasCustomCertificate         bool     `json:"has_custom_certificate"`
+	PendingUpdateCount           int      `json:"pending_update_count"`
+	IPAddress                    string   `json:"ip_address,omitempty"`
+	LastErrorDate                int      `json:"last_error_date,omitempty"`
+	LastErrorMessage             string   `json:"last_error_message,omitempty"`
+	LastSynchronizationErrorDate int      `json:"last_synchronization_error_date,omitempty"`
+	MaxConnections               int      `json:"max_connections,omitempty"`
+	AllowedUpdates               []string `json:"allowed_updates,omitempty"`
+}

tgapi/passport_methods.go

@@ -0,0 +1,16 @@
+package tgapi
+
+// SetPassportDataErrorsP holds parameters for the setPassportDataErrors method.
+// See https://core.telegram.org/bots/api#setpassportdataerrors
+type SetPassportDataErrorsP struct {
+	UserID int64                  `json:"user_id"`
+	Errors []PassportElementError `json:"errors"`
+}
+
+// SetPassportDataErrors informs a user about Telegram Passport data errors.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setpassportdataerrors
+func (api *API) SetPassportDataErrors(params SetPassportDataErrorsP) (bool, error) {
+	req := NewRequest[bool]("setPassportDataErrors", params)
+	return req.Do(api)
+}

tgapi/passport_types.go

@@ -0,0 +1,5 @@
+package tgapi
+
+// PassportElementError is a JSON-serializable passport element error object.
+// See https://core.telegram.org/bots/api#passportelementerror
+type PassportElementError map[string]any

tgapi/payments_methods.go

@@ -0,0 +1,117 @@
+package tgapi
+
+// SendInvoiceP holds parameters for the sendInvoice method.
+// See https://core.telegram.org/bots/api#sendinvoice
+type SendInvoiceP struct {
+	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
+	ChatID                int64  `json:"chat_id"`
+	MessageThreadID       int    `json:"message_thread_id,omitempty"`
+	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
+
+	Title         string         `json:"title"`
+	Description   string         `json:"description"`
+	Payload       string         `json:"payload"`
+	ProviderToken string         `json:"provider_token,omitempty"`
+	Currency      string         `json:"currency"`
+	Prices        []LabeledPrice `json:"prices"`
+
+	MaxTipAmount        int    `json:"max_tip_amount,omitempty"`
+	SuggestedTipAmounts []int  `json:"suggested_tip_amounts,omitempty"`
+	StartParameter      string `json:"start_parameter,omitempty"`
+	ProviderData        string `json:"provider_data,omitempty"`
+	PhotoURL            string `json:"photo_url,omitempty"`
+	PhotoSize           int    `json:"photo_size,omitempty"`
+	PhotoWidth          int    `json:"photo_width,omitempty"`
+	PhotoHeight         int    `json:"photo_height,omitempty"`
+	NeedName            bool   `json:"need_name,omitempty"`
+	NeedPhoneNumber     bool   `json:"need_phone_number,omitempty"`
+	NeedEmail           bool   `json:"need_email,omitempty"`
+	NeedShippingAddress bool   `json:"need_shipping_address,omitempty"`
+	SendPhoneToProvider bool   `json:"send_phone_number_to_provider,omitempty"`
+	SendEmailToProvider bool   `json:"send_email_to_provider,omitempty"`
+	IsFlexible          bool   `json:"is_flexible,omitempty"`
+	DisableNotification bool   `json:"disable_notification,omitempty"`
+	ProtectContent      bool   `json:"protect_content,omitempty"`
+	AllowPaidBroadcast  bool   `json:"allow_paid_broadcast,omitempty"`
+	MessageEffectID     string `json:"message_effect_id,omitempty"`
+
+	SuggestedPostParameters *SuggestedPostParameters `json:"suggested_post_parameters,omitempty"`
+	ReplyParameters         *ReplyParameters         `json:"reply_parameters,omitempty"`
+	ReplyMarkup             *InlineKeyboardMarkup    `json:"reply_markup,omitempty"`
+}
+
+// SendInvoice sends an invoice.
+// See https://core.telegram.org/bots/api#sendinvoice
+func (api *API) SendInvoice(params SendInvoiceP) (Message, error) {
+	req := NewRequestWithChatID[Message]("sendInvoice", params, params.ChatID)
+	return req.Do(api)
+}
+
+// CreateInvoiceLinkP holds parameters for the createInvoiceLink method.
+// See https://core.telegram.org/bots/api#createinvoicelink
+type CreateInvoiceLinkP struct {
+	BusinessConnectionID string `json:"business_connection_id,omitempty"`
+
+	Title         string         `json:"title"`
+	Description   string         `json:"description"`
+	Payload       string         `json:"payload"`
+	ProviderToken string         `json:"provider_token,omitempty"`
+	Currency      string         `json:"currency"`
+	Prices        []LabeledPrice `json:"prices"`
+
+	SubscriptionPeriod  int    `json:"subscription_period,omitempty"`
+	MaxTipAmount        int    `json:"max_tip_amount,omitempty"`
+	SuggestedTipAmounts []int  `json:"suggested_tip_amounts,omitempty"`
+	ProviderData        string `json:"provider_data,omitempty"`
+	PhotoURL            string `json:"photo_url,omitempty"`
+	PhotoSize           int    `json:"photo_size,omitempty"`
+	PhotoWidth          int    `json:"photo_width,omitempty"`
+	PhotoHeight         int    `json:"photo_height,omitempty"`
+	NeedName            bool   `json:"need_name,omitempty"`
+	NeedPhoneNumber     bool   `json:"need_phone_number,omitempty"`
+	NeedEmail           bool   `json:"need_email,omitempty"`
+	NeedShippingAddress bool   `json:"need_shipping_address,omitempty"`
+	SendPhoneToProvider bool   `json:"send_phone_number_to_provider,omitempty"`
+	SendEmailToProvider bool   `json:"send_email_to_provider,omitempty"`
+	IsFlexible          bool   `json:"is_flexible,omitempty"`
+}
+
+// CreateInvoiceLink creates an invoice link.
+// See https://core.telegram.org/bots/api#createinvoicelink
+func (api *API) CreateInvoiceLink(params CreateInvoiceLinkP) (string, error) {
+	req := NewRequest[string]("createInvoiceLink", params)
+	return req.Do(api)
+}
+
+// AnswerShippingQueryP holds parameters for the answerShippingQuery method.
+// See https://core.telegram.org/bots/api#answershippingquery
+type AnswerShippingQueryP struct {
+	ShippingQueryID string           `json:"shipping_query_id"`
+	OK              bool             `json:"ok"`
+	ShippingOptions []ShippingOption `json:"shipping_options,omitempty"`
+	ErrorMessage    string           `json:"error_message,omitempty"`
+}
+
+// AnswerShippingQuery answers a shipping query.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#answershippingquery
+func (api *API) AnswerShippingQuery(params AnswerShippingQueryP) (bool, error) {
+	req := NewRequest[bool]("answerShippingQuery", params)
+	return req.Do(api)
+}
+
+// AnswerPreCheckoutQueryP holds parameters for the answerPreCheckoutQuery method.
+// See https://core.telegram.org/bots/api#answerprecheckoutquery
+type AnswerPreCheckoutQueryP struct {
+	PreCheckoutQueryID string `json:"pre_checkout_query_id"`
+	OK                 bool   `json:"ok"`
+	ErrorMessage       string `json:"error_message,omitempty"`
+}
+
+// AnswerPreCheckoutQuery answers a pre-checkout query.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#answerprecheckoutquery
+func (api *API) AnswerPreCheckoutQuery(params AnswerPreCheckoutQueryP) (bool, error) {
+	req := NewRequest[bool]("answerPreCheckoutQuery", params)
+	return req.Do(api)
+}

tgapi/payments_types.go

@@ -0,0 +1,16 @@
+package tgapi
+
+// LabeledPrice represents a price portion.
+// See https://core.telegram.org/bots/api#labeledprice
+type LabeledPrice struct {
+	Label  string `json:"label"`
+	Amount int    `json:"amount"`
+}
+
+// ShippingOption represents one shipping option.
+// See https://core.telegram.org/bots/api#shippingoption
+type ShippingOption struct {
+	ID     string         `json:"id"`
+	Title  string         `json:"title"`
+	Prices []LabeledPrice `json:"prices"`
+}

tgapi/pool.go

@@ -2,91 +2,174 @@ package tgapi
 
 import (
 	"context"
-	"errors"
 	"sync"
 )
 
-var ErrPoolQueueFull = errors.New("worker pool queue full")
-
-type RequestEnvelope struct {
-	DoFunc   func(context.Context) (any, error) // функция, которая выполнит запрос и вернет any
-	ResultCh chan RequestResult                 // канал для результата
-}
-type RequestResult struct {
-	Value any
-	Err   error
+// workerPool — приватная структура, управляющая пулом воркеров.
+// Внешний код не может создавать или напрямую взаимодействовать с этой структурой.
+// Используется только через экспортируемые методы newWorkerPool, start, stop, submit.
+type workerPool struct {
+	taskCh    chan requestEnvelope // канал для принятия задач (буферизованный)
+	queueSize int                  // максимальный размер очереди
+	workers   int                  // количество воркеров (горутин)
+	wg        sync.WaitGroup       // синхронизирует завершение всех воркеров при остановке
+	quit      chan struct{}        // канал для сигнала остановки
+	stopOnce  sync.Once            // гарантирует идемпотентную остановку пула
+	started   bool                 // флаг, указывающий, запущен ли пул
+	stopped   bool                 // флаг, указывающий, что пул остановлен
+	startedMu sync.Mutex           // мьютекс для безопасного доступа к started
 }
 
-// WorkerPool управляет воркерами и очередью
-type WorkerPool struct {
-	taskCh    chan RequestEnvelope
-	queueSize int
-	workers   int
-	wg        sync.WaitGroup
-	quit      chan struct{}
-	started   bool
-	startedMu sync.Mutex
+// requestEnvelope — приватная структура, инкапсулирующая задачу и канал для результата.
+// Используется только внутри пакета для передачи задач воркерам.
+type requestEnvelope struct {
+	ctx      context.Context                    // контекст конкретной задачи
+	doFunc   func(context.Context) (any, error) // функция, выполняющая запрос
+	resultCh chan requestResult                 // канал, через который воркер вернёт результат
 }
 
-func NewWorkerPool(workers int, queueSize int) *WorkerPool {
-	return &WorkerPool{
-		taskCh:    make(chan RequestEnvelope, queueSize),
+// requestResult — приватная структура, представляющая результат выполнения задачи.
+// Внешний код получает его через канал, но не знает структуры — только через <-chan requestResult.
+type requestResult struct {
+	value any   // значение, возвращённое задачей
+	err   error // ошибка, если возникла
+}
+
+// newWorkerPool создаёт новый пул воркеров с заданным количеством горутин и размером очереди.
+// Это единственный способ создать workerPool — внешний код не может создать его напрямую.
+func newWorkerPool(workers int, queueSize int) *workerPool {
+	if workers <= 0 {
+		workers = 1 // защита от некорректных значений
+	}
+	if queueSize <= 0 {
+		queueSize = 100 // разумный дефолт
+	}
+
+	return &workerPool{
+		taskCh:    make(chan requestEnvelope, queueSize),
 		queueSize: queueSize,
 		workers:   workers,
 		quit:      make(chan struct{}),
 	}
 }
 
-// Start запускает воркеров
-func (p *WorkerPool) Start(ctx context.Context) {
+// start запускает воркеры (горутины), которые будут обрабатывать задачи из очереди.
+// Метод идемпотентен: если пул уже запущен — ничего не делает.
+// Должен вызываться перед первым вызовом submit.
+func (p *workerPool) start() {
 	p.startedMu.Lock()
 	defer p.startedMu.Unlock()
 	if p.started {
-		return
+		return // уже запущен — ничего не делаем
 	}
 	p.started = true
+
+	// Запускаем воркеры — каждый будет обрабатывать задачи в бесконечном цикле
 	for i := 0; i < p.workers; i++ {
 		p.wg.Add(1)
-		go p.worker(ctx)
+		go p.worker() // запускаем горутину
 	}
 }
 
-// Stop останавливает пул (ждет завершения текущих задач)
-func (p *WorkerPool) Stop() {
-	close(p.quit)
-	p.wg.Wait()
+// stop останавливает пул воркеров.
+// Отправляет сигнал остановки через quit-канал и ждёт завершения всех активных задач.
+// Безопасно вызывать многократно — после остановки повторные вызовы не имеют эффекта.
+func (p *workerPool) stop() {
+	p.stopOnce.Do(func() {
+		p.startedMu.Lock()
+		p.stopped = true
+		p.started = false
+		close(p.quit) // сигнал для всех воркеров — выйти из цикла
+		p.startedMu.Unlock()
+
+		p.wg.Wait() // ждём, пока все воркеры завершатся
+	})
 }
 
-// Submit отправляет задачу в очередь и возвращает канал для результата
-func (p *WorkerPool) Submit(ctx context.Context, do func(context.Context) (any, error)) (<-chan RequestResult, error) {
+// submit отправляет задачу в очередь и возвращает канал, через который будет получен результат.
+// Если очередь переполнена — возвращает ErrPoolQueueFull.
+// Канал результата имеет буфер 1, чтобы не блокировать воркера при записи.
+// Контекст используется для отмены задачи, если клиент отменил запрос до отправки.
+func (p *workerPool) submit(ctx context.Context, do func(context.Context) (any, error)) (<-chan requestResult, error) {
+	p.startedMu.Lock()
+	if p.stopped || !p.started {
+		p.startedMu.Unlock()
+		return nil, ErrPoolStopped
+	}
+
+	// Проверяем, не превышена ли очередь
 	if len(p.taskCh) >= p.queueSize {
+		p.startedMu.Unlock()
 		return nil, ErrPoolQueueFull
 	}
 
-	resultCh := make(chan RequestResult, 1) // буфер 1, чтобы не блокировать воркера
-	envelope := RequestEnvelope{do, resultCh}
+	// Создаём канал для результата — буферизованный, чтобы не блокировать воркера
+	resultCh := make(chan requestResult, 1)
+
+	// Создаём обёртку задачи
+	envelope := requestEnvelope{
+		ctx:      ctx,
+		doFunc:   do,
+		resultCh: resultCh,
+	}
+
+	// Пытаемся отправить задачу в очередь
 	select {
 	case <-ctx.Done():
+		p.startedMu.Unlock()
+		// Клиент отменил операцию до отправки — возвращаем ошибку отмены
 		return nil, ctx.Err()
 	case p.taskCh <- envelope:
+		p.startedMu.Unlock()
+		// Успешно отправлено — возвращаем канал для чтения результата
 		return resultCh, nil
 	default:
+		p.startedMu.Unlock()
+		// Очередь переполнена — не должно происходить при проверке len(p.taskCh), но на всякий случай
 		return nil, ErrPoolQueueFull
 	}
 }
 
-// worker выполняет задачи
-func (p *WorkerPool) worker(ctx context.Context) {
-	defer p.wg.Done()
+// worker — приватная горутина, выполняющая задачи из очереди.
+// Каждый воркер работает в бесконечном цикле, пока не получит сигнал остановки.
+// При получении задачи:
+//   - вызывает doFunc с контекстом
+//   - записывает результат в resultCh
+//   - закрывает канал, чтобы клиент мог прочитать и завершить
+//
+// После закрытия quit-канала — воркер завершает работу.
+func (p *workerPool) worker() {
+	defer p.wg.Done() // уменьшаем WaitGroup при завершении горутины
+
 	for {
 		select {
 		case <-p.quit:
-			return
+			// Получен сигнал остановки — дренируем очередь и выходим.
+			// После stop() новые задачи не принимаются.
+			for {
+				select {
+				case envelope := <-p.taskCh:
+					p.executeEnvelope(envelope)
+				default:
+					return
+				}
+			}
+
 		case envelope := <-p.taskCh:
-			// Выполняем задачу с переданным контекстом (или можно использовать свой)
-			val, err := envelope.DoFunc(ctx)
-			envelope.ResultCh <- RequestResult{Value: val, Err: err}
-			close(envelope.ResultCh)
+			p.executeEnvelope(envelope)
 		}
 	}
 }
+
+func (p *workerPool) executeEnvelope(envelope requestEnvelope) {
+	// Выполняем задачу с переданным контекстом (клиентский или общий)
+	value, err := envelope.doFunc(envelope.ctx)
+
+	// Записываем результат в канал — не блокируем, т.к. буфер 1
+	envelope.resultCh <- requestResult{
+		value: value,
+		err:   err,
+	}
+	// Закрываем канал — клиент знает, что результат пришёл и больше не будет
+	close(envelope.resultCh)
+}

tgapi/stars_methods.go

@@ -0,0 +1,53 @@
+package tgapi
+
+// GetStarTransactionsP holds parameters for the getStarTransactions method.
+// See https://core.telegram.org/bots/api#getstartransactions
+type GetStarTransactionsP struct {
+	Offset int `json:"offset,omitempty"`
+	Limit  int `json:"limit,omitempty"`
+}
+
+// GetMyStarBalance returns the bot's Telegram Star balance.
+// See https://core.telegram.org/bots/api#getmystarbalance
+func (api *API) GetMyStarBalance() (StarAmount, error) {
+	req := NewRequest[StarAmount]("getMyStarBalance", NoParams)
+	return req.Do(api)
+}
+
+// GetStarTransactions returns Telegram Star transactions for the bot.
+// See https://core.telegram.org/bots/api#getstartransactions
+func (api *API) GetStarTransactions(params GetStarTransactionsP) (StarTransactions, error) {
+	req := NewRequest[StarTransactions]("getStarTransactions", params)
+	return req.Do(api)
+}
+
+// RefundStarPaymentP holds parameters for the refundStarPayment method.
+// See https://core.telegram.org/bots/api#refundstarpayment
+type RefundStarPaymentP struct {
+	UserID                  int64  `json:"user_id"`
+	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
+}
+
+// RefundStarPayment refunds a successful Telegram Stars payment.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#refundstarpayment
+func (api *API) RefundStarPayment(params RefundStarPaymentP) (bool, error) {
+	req := NewRequest[bool]("refundStarPayment", params)
+	return req.Do(api)
+}
+
+// EditUserStarSubscriptionP holds parameters for the editUserStarSubscription method.
+// See https://core.telegram.org/bots/api#edituserstarsubscription
+type EditUserStarSubscriptionP struct {
+	UserID                  int64  `json:"user_id"`
+	TelegramPaymentChargeID string `json:"telegram_payment_charge_id"`
+	IsCanceled              bool   `json:"is_canceled"`
+}
+
+// EditUserStarSubscription cancels or re-enables a user star subscription extension.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#edituserstarsubscription
+func (api *API) EditUserStarSubscription(params EditUserStarSubscriptionP) (bool, error) {
+	req := NewRequest[bool]("editUserStarSubscription", params)
+	return req.Do(api)
+}

tgapi/stars_types.go

@@ -0,0 +1,18 @@
+package tgapi
+
+// StarTransaction describes a Telegram Star transaction.
+// See https://core.telegram.org/bots/api#startransaction
+type StarTransaction struct {
+	ID             string         `json:"id"`
+	Amount         int            `json:"amount"`
+	NanostarAmount int            `json:"nanostar_amount,omitempty"`
+	Date           int            `json:"date"`
+	Source         map[string]any `json:"source,omitempty"`
+	Receiver       map[string]any `json:"receiver,omitempty"`
+}
+
+// StarTransactions contains a list of Telegram Star transactions.
+// See https://core.telegram.org/bots/api#startransactions
+type StarTransactions struct {
+	Transactions []StarTransaction `json:"transactions"`
+}

tgapi/stickers_methods.go

@@ -1,8 +1,10 @@
 package tgapi
 
+// SendStickerP holds parameters for the sendSticker method.
+// See https://core.telegram.org/bots/api#sendsticker
 type SendStickerP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -14,31 +16,62 @@ type SendStickerP struct {
 	MessageEffectID     string `json:"message_effect_id,omitempty"`
 }
 
+// SendSticker sends a static .WEBP, animated .TGS, or video .WEBM sticker.
+// See https://core.telegram.org/bots/api#sendsticker
 func (api *API) SendSticker(params SendStickerP) (Message, error) {
-	req := NewRequest[Message]("sendSticker", params)
+	req := NewRequestWithChatID[Message]("sendSticker", params, params.ChatID)
 	return req.Do(api)
 }
 
+// GetStickerSetP holds parameters for the getStickerSet method.
+// See https://core.telegram.org/bots/api#getstickerset
 type GetStickerSetP struct {
 	Name string `json:"name"`
 }
 
+// GetStickerSet returns a sticker set by its name.
+// See https://core.telegram.org/bots/api#getstickerset
 func (api *API) GetStickerSet(params GetStickerSetP) (StickerSet, error) {
 	req := NewRequest[StickerSet]("getStickerSet", params)
 	return req.Do(api)
 }
 
+// GetCustomEmojiStickersP holds parameters for the getCustomEmojiStickers method.
+// See https://core.telegram.org/bots/api#getcustomemojistickers
 type GetCustomEmojiStickersP struct {
 	CustomEmojiIDs []string `json:"custom_emoji_ids"`
 }
 
+// GetCustomEmojiStickers returns information about custom emoji stickers by their IDs.
+// See https://core.telegram.org/bots/api#getcustomemojistickers
 func (api *API) GetCustomEmojiStickers(params GetCustomEmojiStickersP) ([]Sticker, error) {
 	req := NewRequest[[]Sticker]("getCustomEmojiStickers", params)
 	return req.Do(api)
 }
 
+// UploadStickerFileP holds parameters for the uploadStickerFile method.
+// See https://core.telegram.org/bots/api#uploadstickerfile
+type UploadStickerFileP struct {
+	UserID        int64              `json:"user_id"`
+	StickerFormat InputStickerFormat `json:"sticker_format"`
+}
+
+// UploadStickerFile uploads a sticker file for later use in sticker set methods.
+// sticker is the file to upload.
+// See https://core.telegram.org/bots/api#uploadstickerfile
+func (api *API) UploadStickerFile(params UploadStickerFileP, sticker UploaderFile) (File, error) {
+	uploader := NewUploader(api)
+	defer func() {
+		_ = uploader.Close()
+	}()
+	req := NewUploaderRequest[File]("uploadStickerFile", params, sticker.SetType(UploaderStickerType))
+	return req.Do(uploader)
+}
+
+// CreateNewStickerSetP holds parameters for the createNewStickerSet method.
+// See https://core.telegram.org/bots/api#createnewstickerset
 type CreateNewStickerSetP struct {
-	UserID int    `json:"user_id"`
+	UserID int64  `json:"user_id"`
 	Name   string `json:"name"`
 	Title  string `json:"title"`
 
@@ -47,119 +80,177 @@ type CreateNewStickerSetP struct {
 	NeedsRepainting bool           `json:"needs_repainting,omitempty"`
 }
 
+// CreateNewStickerSet creates a new sticker set owned by a user.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#createnewstickerset
 func (api *API) CreateNewStickerSet(params CreateNewStickerSetP) (bool, error) {
 	req := NewRequest[bool]("createNewStickerSet", params)
 	return req.Do(api)
 }
 
+// AddStickerToSetP holds parameters for the addStickerToSet method.
+// See https://core.telegram.org/bots/api#addstickertoset
 type AddStickerToSetP struct {
-	UserID  int          `json:"user_id"`
+	UserID  int64        `json:"user_id"`
 	Name    string       `json:"name"`
 	Sticker InputSticker `json:"sticker"`
 }
 
+// AddStickerToSet adds a new sticker to a set created by the bot.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#addstickertoset
 func (api *API) AddStickerToSet(params AddStickerToSetP) (bool, error) {
 	req := NewRequest[bool]("addStickerToSet", params)
 	return req.Do(api)
 }
 
+// SetStickerPositionInSetP holds parameters for the setStickerPositionInSet method.
+// See https://core.telegram.org/bots/api#setstickerpositioninset
 type SetStickerPositionInSetP struct {
 	Sticker  string `json:"sticker"`
 	Position int    `json:"position"`
 }
 
-func (api *API) SetStickerPosition(params SetStickerPositionInSetP) (bool, error) {
-	req := NewRequest[bool]("setStickerPosition", params)
+// SetStickerPositionInSet moves a sticker in a set to a specific position.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickerpositioninset
+func (api *API) SetStickerPositionInSet(params SetStickerPositionInSetP) (bool, error) {
+	req := NewRequest[bool]("setStickerPositionInSet", params)
 	return req.Do(api)
 }
 
+// DeleteStickerFromSetP holds parameters for the deleteStickerFromSet method.
+// See https://core.telegram.org/bots/api#deletestickerfromset
 type DeleteStickerFromSetP struct {
 	Sticker string `json:"sticker"`
 }
 
+// DeleteStickerFromSet deletes a sticker from a set created by the bot.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletestickerfromset
 func (api *API) DeleteStickerFromSet(params DeleteStickerFromSetP) (bool, error) {
 	req := NewRequest[bool]("deleteStickerFromSet", params)
 	return req.Do(api)
 }
 
+// ReplaceStickerInSetP holds parameters for the replaceStickerInSet method.
+// See https://core.telegram.org/bots/api#replacestickerinset
 type ReplaceStickerInSetP struct {
-	UserID     int          `json:"user_id"`
+	UserID     int64        `json:"user_id"`
 	Name       string       `json:"name"`
 	OldSticker string       `json:"old_sticker"`
 	Sticker    InputSticker `json:"sticker"`
 }
 
+// ReplaceStickerInSet replaces an existing sticker in a set with a new one.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#replacestickerinset
 func (api *API) ReplaceStickerInSet(params ReplaceStickerInSetP) (bool, error) {
 	req := NewRequest[bool]("replaceStickerInSet", params)
 	return req.Do(api)
 }
 
+// SetStickerEmojiListP holds parameters for the setStickerEmojiList method.
+// See https://core.telegram.org/bots/api#setstickeremojilist
 type SetStickerEmojiListP struct {
 	Sticker   string   `json:"sticker"`
 	EmojiList []string `json:"emoji_list"`
 }
 
+// SetStickerEmojiList changes the list of emoji associated with a sticker.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickeremojilist
 func (api *API) SetStickerEmojiList(params SetStickerEmojiListP) (bool, error) {
 	req := NewRequest[bool]("setStickerEmojiList", params)
 	return req.Do(api)
 }
 
+// SetStickerKeywordsP holds parameters for the setStickerKeywords method.
+// See https://core.telegram.org/bots/api#setstickerkeywords
 type SetStickerKeywordsP struct {
 	Sticker  string   `json:"sticker"`
 	Keywords []string `json:"keywords"`
 }
 
+// SetStickerKeywords changes the keywords of a sticker.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickerkeywords
 func (api *API) SetStickerKeywords(params SetStickerKeywordsP) (bool, error) {
 	req := NewRequest[bool]("setStickerKeywords", params)
 	return req.Do(api)
 }
 
+// SetStickerMaskPositionP holds parameters for the setStickerMaskPosition method.
+// See https://core.telegram.org/bots/api#setstickermaskposition
 type SetStickerMaskPositionP struct {
 	Sticker      string        `json:"sticker"`
 	MaskPosition *MaskPosition `json:"mask_position,omitempty"`
 }
 
+// SetStickerMaskPosition changes the mask position of a mask sticker.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickermaskposition
 func (api *API) SetStickerMaskPosition(params SetStickerMaskPositionP) (bool, error) {
 	req := NewRequest[bool]("setStickerMaskPosition", params)
 	return req.Do(api)
 }
 
+// SetStickerSetTitleP holds parameters for the setStickerSetTitle method.
+// See https://core.telegram.org/bots/api#setstickersettitle
 type SetStickerSetTitleP struct {
 	Name  string `json:"name"`
 	Title string `json:"title"`
 }
 
+// SetStickerSetTitle sets the title of a sticker set created by the bot.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickersettitle
 func (api *API) SetStickerSetTitle(params SetStickerSetTitleP) (bool, error) {
 	req := NewRequest[bool]("setStickerSetTitle", params)
 	return req.Do(api)
 }
 
+// SetStickerSetThumbnailP holds parameters for the setStickerSetThumbnail method.
+// See https://core.telegram.org/bots/api#setstickersetthumbnail
 type SetStickerSetThumbnailP struct {
 	Name      string             `json:"name"`
-	UserID    int                `json:"user_id"`
+	UserID    int64              `json:"user_id"`
 	Thumbnail string             `json:"thumbnail"`
 	Format    InputStickerFormat `json:"format"`
 }
 
+// SetStickerSetThumbnail sets the thumbnail of a sticker set.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setstickersetthumbnail
 func (api *API) SetStickerSetThumbnail(params SetStickerSetThumbnailP) (bool, error) {
 	req := NewRequest[bool]("setStickerSetThumbnail", params)
 	return req.Do(api)
 }
 
+// SetCustomEmojiStickerSetThumbnailP holds parameters for the setCustomEmojiStickerSetThumbnail method.
+// See https://core.telegram.org/bots/api#setcustomemojistickersetthumbnail
 type SetCustomEmojiStickerSetThumbnailP struct {
 	Name          string `json:"name"`
 	CustomEmojiID string `json:"custom_emoji_id,omitempty"`
 }
 
-func (api *API) SetCustomEmojiStickerSetThumbnail(params SetStickerSetThumbnailP) (bool, error) {
+// SetCustomEmojiStickerSetThumbnail sets the thumbnail of a custom emoji sticker set.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#setcustomemojistickersetthumbnail
+func (api *API) SetCustomEmojiStickerSetThumbnail(params SetCustomEmojiStickerSetThumbnailP) (bool, error) {
 	req := NewRequest[bool]("setCustomEmojiStickerSetThumbnail", params)
 	return req.Do(api)
 }
 
+// DeleteStickerSetP holds parameters for the deleteStickerSet method.
+// See https://core.telegram.org/bots/api#deletestickerset
 type DeleteStickerSetP struct {
 	Name string `json:"name"`
 }
 
+// DeleteStickerSet deletes a sticker set created by the bot.
+// Returns True on success.
+// See https://core.telegram.org/bots/api#deletestickerset
 func (api *API) DeleteStickerSet(params DeleteStickerSetP) (bool, error) {
 	req := NewRequest[bool]("deleteStickerSet", params)
 	return req.Do(api)

tgapi/stickers_types.go

@@ -1,14 +1,21 @@
 package tgapi
 
+// MaskPositionPoint represents the part of the face where a mask should be placed.
 type MaskPositionPoint string
 
 const (
+	// MaskPositionForehead places the mask on the forehead.
 	MaskPositionForehead MaskPositionPoint = "forehead"
-	MaskPositionEyes     MaskPositionPoint = "eyes"
-	MaskPositionMouth    MaskPositionPoint = "mouth"
-	MaskPositionChin     MaskPositionPoint = "chin"
+	// MaskPositionEyes places the mask on the eyes.
+	MaskPositionEyes MaskPositionPoint = "eyes"
+	// MaskPositionMouth places the mask on the mouth.
+	MaskPositionMouth MaskPositionPoint = "mouth"
+	// MaskPositionChin places the mask on the chin.
+	MaskPositionChin MaskPositionPoint = "chin"
 )
 
+// MaskPosition describes the position on faces where a mask should be placed by default.
+// See https://core.telegram.org/bots/api#maskposition
 type MaskPosition struct {
 	Point  MaskPositionPoint `json:"point"`
 	XShift float32           `json:"x_shift"`
@@ -16,14 +23,20 @@ type MaskPosition struct {
 	Scale  float32           `json:"scale"`
 }
 
+// StickerType represents the type of a sticker.
 type StickerType string
 
 const (
-	StickerTypeRegular     StickerType = "regular"
-	StickerTypeMask        StickerType = "mask"
+	// StickerTypeRegular is a regular sticker.
+	StickerTypeRegular StickerType = "regular"
+	// StickerTypeMask is a mask sticker that can be placed on faces.
+	StickerTypeMask StickerType = "mask"
+	// StickerTypeCustomEmoji is a custom emoji sticker.
 	StickerTypeCustomEmoji StickerType = "custom_emoji"
 )
 
+// Sticker represents a sticker.
+// See https://core.telegram.org/bots/api#sticker
 type Sticker struct {
 	FileId       string      `json:"file_id"`
 	FileUniqueId string      `json:"file_unique_id"`
@@ -39,8 +52,11 @@ type Sticker struct {
 	MaskPosition   *MaskPosition `json:"mask_position,omitempty"`
 	CustomEmojiID  *string       `json:"custom_emoji_id,omitempty"`
 	NeedRepainting *bool         `json:"need_repainting,omitempty"`
-	FileSize       *int          `json:"file_size,omitempty"`
+	FileSize       *int64        `json:"file_size,omitempty"`
 }
+
+// StickerSet represents a sticker set.
+// See https://core.telegram.org/bots/api#stickerset
 type StickerSet struct {
 	Name        string      `json:"name"`
 	Title       string      `json:"title"`
@@ -48,14 +64,21 @@ type StickerSet struct {
 	Stickers    []Sticker   `json:"stickers"`
 	Thumbnail   *PhotoSize  `json:"thumbnail,omitempty"`
 }
+
+// InputStickerFormat represents the format of an input sticker.
 type InputStickerFormat string
 
 const (
-	InputStickerFormatStatic   InputStickerFormat = "static"
+	// InputStickerFormatStatic is a static sticker (WEBP).
+	InputStickerFormatStatic InputStickerFormat = "static"
+	// InputStickerFormatAnimated is an animated sticker (TGS).
 	InputStickerFormatAnimated InputStickerFormat = "animated"
-	InputStickerFormatVideo    InputStickerFormat = "video"
+	// InputStickerFormatVideo is a video sticker (WEBM).
+	InputStickerFormatVideo InputStickerFormat = "video"
 )
 
+// InputSticker describes a sticker to be added to a sticker set.
+// See https://core.telegram.org/bots/api#inputsticker
 type InputSticker struct {
 	Sticker      string             `json:"sticker"`
 	Format       InputStickerFormat `json:"format"`

tgapi/types.go

@@ -1,35 +1,61 @@
 package tgapi
 
+// UpdateType represents the type of incoming update.
 type UpdateType string
 
 const (
-	UpdateTypeMessage              UpdateType = "message"
-	UpdateTypeEditedMessage        UpdateType = "edited_message"
-	UpdateTypeChannelPost          UpdateType = "channel_post"
-	UpdateTypeEditedChannelPost    UpdateType = "edited_channel_post"
-	UpdateTypeMessageReaction      UpdateType = "message_reaction"
+	// UpdateTypeMessage is a regular message update.
+	UpdateTypeMessage UpdateType = "message"
+	// UpdateTypeEditedMessage is an edited message update.
+	UpdateTypeEditedMessage UpdateType = "edited_message"
+	// UpdateTypeChannelPost is a channel post update.
+	UpdateTypeChannelPost UpdateType = "channel_post"
+	// UpdateTypeEditedChannelPost is an edited channel post update.
+	UpdateTypeEditedChannelPost UpdateType = "edited_channel_post"
+	// UpdateTypeMessageReaction is a message reaction update.
+	UpdateTypeMessageReaction UpdateType = "message_reaction"
+	// UpdateTypeMessageReactionCount is a message reaction count update.
 	UpdateTypeMessageReactionCount UpdateType = "message_reaction_count"
 
-	UpdateTypeBusinessConnection     UpdateType = "business_connection"
-	UpdateTypeBusinessMessage        UpdateType = "business_message"
-	UpdateTypeEditedBusinessMessage  UpdateType = "edited_business_message"
+	// UpdateTypeBusinessConnection is a business connection update.
+	UpdateTypeBusinessConnection UpdateType = "business_connection"
+	// UpdateTypeBusinessMessage is a business message update.
+	UpdateTypeBusinessMessage UpdateType = "business_message"
+	// UpdateTypeEditedBusinessMessage is an edited business message update.
+	UpdateTypeEditedBusinessMessage UpdateType = "edited_business_message"
+	// UpdateTypeDeletedBusinessMessage is a deleted business message update.
 	UpdateTypeDeletedBusinessMessage UpdateType = "deleted_business_message"
 
-	UpdateTypeInlineQuery        UpdateType = "inline_query"
+	// UpdateTypeInlineQuery is an inline query update.
+	UpdateTypeInlineQuery UpdateType = "inline_query"
+	// UpdateTypeChosenInlineResult is a chosen inline result update.
 	UpdateTypeChosenInlineResult UpdateType = "chosen_inline_result"
-	UpdateTypeCallbackQuery      UpdateType = "callback_query"
-	UpdateTypeShippingQuery      UpdateType = "shipping_query"
-	UpdateTypePreCheckoutQuery   UpdateType = "pre_checkout_query"
+	// UpdateTypeCallbackQuery is a callback query update.
+	UpdateTypeCallbackQuery UpdateType = "callback_query"
+	// UpdateTypeShippingQuery is a shipping query update.
+	UpdateTypeShippingQuery UpdateType = "shipping_query"
+	// UpdateTypePreCheckoutQuery is a pre-checkout query update.
+	UpdateTypePreCheckoutQuery UpdateType = "pre_checkout_query"
+	// UpdateTypePurchasedPaidMedia is a purchased paid media update.
 	UpdateTypePurchasedPaidMedia UpdateType = "purchased_paid_media"
-	UpdateTypePoll               UpdateType = "poll"
-	UpdateTypePollAnswer         UpdateType = "poll_answer"
-	UpdateTypeMyChatMember       UpdateType = "my_chat_member"
-	UpdateTypeChatMember         UpdateType = "chat_member"
-	UpdateTypeChatJoinRequest    UpdateType = "chat_join_request"
-	UpdateTypeChatBoost          UpdateType = "chat_boost"
-	UpdateTypeRemovedChatBoost   UpdateType = "removed_chat_boost"
+	// UpdateTypePoll is a poll update.
+	UpdateTypePoll UpdateType = "poll"
+	// UpdateTypePollAnswer is a poll answer update.
+	UpdateTypePollAnswer UpdateType = "poll_answer"
+	// UpdateTypeMyChatMember is a my chat member update.
+	UpdateTypeMyChatMember UpdateType = "my_chat_member"
+	// UpdateTypeChatMember is a chat member update.
+	UpdateTypeChatMember UpdateType = "chat_member"
+	// UpdateTypeChatJoinRequest is a chat join request update.
+	UpdateTypeChatJoinRequest UpdateType = "chat_join_request"
+	// UpdateTypeChatBoost is a chat boost update.
+	UpdateTypeChatBoost UpdateType = "chat_boost"
+	// UpdateTypeRemovedChatBoost is a removed chat boost update.
+	UpdateTypeRemovedChatBoost UpdateType = "removed_chat_boost"
 )
 
+// Update represents an incoming update from Telegram.
+// See https://core.telegram.org/bots/api#update
 type Update struct {
 	UpdateID          int      `json:"update_id"`
 	Message           *Message `json:"message,omitempty"`
@@ -60,6 +86,8 @@ type Update struct {
 	RemovedChatBoost *ChatBoostRemoved  `json:"removed_chat_boost,omitempty"`
 }
 
+// InlineQuery represents an incoming inline query.
+// See https://core.telegram.org/bots/api#inlinequery
 type InlineQuery struct {
 	ID       string    `json:"id"`
 	From     User      `json:"from"`
@@ -68,6 +96,9 @@ type InlineQuery struct {
 	ChatType *ChatType `json:"chat_type,omitempty"`
 	Location *Location `json:"location,omitempty"`
 }
+
+// ChosenInlineResult represents a result of an inline query that was chosen by the user.
+// See https://core.telegram.org/bots/api#choseninlineresult
 type ChosenInlineResult struct {
 	ResultID        string    `json:"result_id"`
 	From            User      `json:"from"`
@@ -76,12 +107,17 @@ type ChosenInlineResult struct {
 	Query           string    `json:"query"`
 }
 
+// ShippingQuery represents an incoming shipping query.
+// See https://core.telegram.org/bots/api#shippingquery
 type ShippingQuery struct {
 	ID              string          `json:"id"`
 	From            User            `json:"from"`
 	InvoicePayload  string          `json:"invoice_payload"`
 	ShippingAddress ShippingAddress `json:"shipping_address"`
 }
+
+// ShippingAddress represents a shipping address.
+// See https://core.telegram.org/bots/api#shippingaddress
 type ShippingAddress struct {
 	CountryCode string `json:"country_code"`
 	State       string `json:"state"`
@@ -91,12 +127,17 @@ type ShippingAddress struct {
 	PostCode    string `json:"post_code"`
 }
 
+// OrderInfo represents information about an order.
+// See https://core.telegram.org/bots/api#orderinfo
 type OrderInfo struct {
 	Name            string          `json:"name"`
 	PhoneNumber     string          `json:"phone_number"`
 	Email           string          `json:"email"`
 	ShippingAddress ShippingAddress `json:"shipping_address"`
 }
+
+// PreCheckoutQuery represents an incoming pre-checkout query.
+// See https://core.telegram.org/bots/api#precheckoutquery
 type PreCheckoutQuery struct {
 	ID               string     `json:"id"`
 	From             User       `json:"from"`
@@ -107,18 +148,24 @@ type PreCheckoutQuery struct {
 	OrderInfo        *OrderInfo `json:"order_info,omitempty"`
 }
 
+// PaidMediaPurchased represents a purchased paid media.
+// See https://core.telegram.org/bots/api#paidmediapurchased
 type PaidMediaPurchased struct {
 	From             User   `json:"from"`
 	PaidMediaPayload string `json:"paid_media_payload"`
 }
 
+// File represents a file ready to be downloaded.
+// See https://core.telegram.org/bots/api#file
 type File struct {
 	FileId       string `json:"file_id"`
 	FileUniqueID string `json:"file_unique_id"`
-	FileSize     int    `json:"file_size,omitempty"`
+	FileSize     int64  `json:"file_size,omitempty"`
 	FilePath     string `json:"file_path,omitempty"`
 }
 
+// Audio represents an audio file to be treated as music by the Telegram clients.
+// See https://core.telegram.org/bots/api#audio
 type Audio struct {
 	FileID       string `json:"file_id"`
 	FileUniqueID string `json:"file_unique_id"`
@@ -128,15 +175,20 @@ type Audio struct {
 	Title     string     `json:"title,omitempty"`
 	FileName  string     `json:"file_name,omitempty"`
 	MimeType  string     `json:"mime_type,omitempty"`
-	FileSize  int        `json:"file_size,omitempty"`
+	FileSize  int64      `json:"file_size,omitempty"`
 	Thumbnail *PhotoSize `json:"thumbnail,omitempty"`
 }
 
+// PollOption contains information about one answer option in a poll.
+// See https://core.telegram.org/bots/api#polloption
 type PollOption struct {
 	Text         string          `json:"text"`
 	TextEntities []MessageEntity `json:"text_entities"`
 	VoterCount   int             `json:"voter_count"`
 }
+
+// Poll contains information about a poll.
+// See https://core.telegram.org/bots/api#poll
 type Poll struct {
 	ID               string          `json:"id"`
 	Question         string          `json:"question"`
@@ -154,12 +206,18 @@ type Poll struct {
 	OpenPeriod            int             `json:"open_period,omitempty"`
 	CloseDate             int             `json:"close_date,omitempty"`
 }
+
+// PollAnswer represents an answer of a user in a poll.
+// See https://core.telegram.org/bots/api#pollanswer
 type PollAnswer struct {
 	PollID    string `json:"poll_id"`
 	VoterChat Chat   `json:"voter_chat"`
 	User      User   `json:"user"`
 	OptionIDS []int  `json:"option_ids"`
 }
+
+// ChatMemberUpdated represents changes in the status of a chat member.
+// See https://core.telegram.org/bots/api#chatmemberupdated
 type ChatMemberUpdated struct {
 	Chat                    Chat            `json:"chat"`
 	From                    User            `json:"from"`
@@ -171,15 +229,19 @@ type ChatMemberUpdated struct {
 	ViaChatFolderInviteLink *bool           `json:"via_chat_folder_invite_link,omitempty"`
 }
 
+// ChatJoinRequest represents a join request sent to a chat.
+// See https://core.telegram.org/bots/api#chatjoinrequest
 type ChatJoinRequest struct {
 	Chat       Chat            `json:"chat"`
 	From       User            `json:"from"`
-	UserChatID int             `json:"user_chat_id"`
+	UserChatID int64           `json:"user_chat_id"`
 	Date       int64           `json:"date"`
 	Bio        *string         `json:"bio,omitempty"`
 	InviteLink *ChatInviteLink `json:"invite_link,omitempty"`
 }
 
+// Location represents a point on the map.
+// See https://core.telegram.org/bots/api#location
 type Location struct {
 	Latitude             float64 `json:"latitude"`
 	Longitude            float64 `json:"longitude"`
@@ -188,12 +250,17 @@ type Location struct {
 	Heading              int     `json:"heading"`
 	ProximityAlertRadius int     `json:"proximity_alert_radius"`
 }
+
+// LocationAddress represents a human-readable address of a location.
 type LocationAddress struct {
 	CountryCode string  `json:"country_code"`
 	State       *string `json:"state,omitempty"`
 	City        *string `json:"city,omitempty"`
 	Street      *string `json:"street,omitempty"`
 }
+
+// Venue represents a venue.
+// See https://core.telegram.org/bots/api#venue
 type Venue struct {
 	Location        Location `json:"location"`
 	Title           string   `json:"title"`
@@ -204,22 +271,25 @@ type Venue struct {
 	GooglePlaceType string   `json:"google_place_type,omitempty"`
 }
 
+// WebAppInfo contains information about a Web App.
+// See https://core.telegram.org/bots/api#webappinfo
 type WebAppInfo struct {
 	URL string `json:"url"`
 }
 
+// StarAmount represents an amount of Telegram Stars.
 type StarAmount struct {
 	Amount         int `json:"amount"`
 	NanostarAmount int `json:"nanostar_amount"`
 }
 
+// Story represents a story.
 type Story struct {
 	Chat Chat `json:"chat"`
 	ID   int  `json:"id"`
 }
 
-// Gifts
-
+// AcceptedGiftTypes represents the types of gifts accepted by a user or chat.
 type AcceptedGiftTypes struct {
 	UnlimitedGifts      bool `json:"unlimited_gifts"`
 	LimitedGifts        bool `json:"limited_gifts"`
@@ -228,6 +298,7 @@ type AcceptedGiftTypes struct {
 	GiftsFromChannels   bool `json:"gifts_from_channels"`
 }
 
+// UniqueGiftColors represents color information for a unique gift.
 type UniqueGiftColors struct {
 	ModelCustomEmojiID    string `json:"model_custom_emoji_id"`
 	SymbolCustomEmojiID   string `json:"symbol_custom_emoji_id"`
@@ -237,11 +308,14 @@ type UniqueGiftColors struct {
 	DarkThemeOtherColors  []int  `json:"dark_theme_other_colors"`
 }
 
+// GiftBackground represents the background of a gift.
 type GiftBackground struct {
 	CenterColor int `json:"center_color"`
 	EdgeColor   int `json:"edge_color"`
 	TextColor   int `json:"text_color"`
 }
+
+// Gift represents a gift that can be sent.
 type Gift struct {
 	ID                     string         `json:"id"`
 	Sticker                Sticker        `json:"sticker"`
@@ -257,24 +331,28 @@ type Gift struct {
 	UniqueGiftVariantColor *int           `json:"unique_gift_variant_color,omitempty"`
 	PublisherChat          *Chat          `json:"publisher_chat,omitempty"`
 }
+
+// Gifts represents a list of gifts.
 type Gifts struct {
 	Gifts []Gift `json:"gifts"`
 }
 
+// OwnedGiftType represents the type of an owned gift.
+type OwnedGiftType string
+
 const (
 	OwnedGiftRegularType OwnedGiftType = "regular"
 	OwnedGiftUniqueType  OwnedGiftType = "unique"
 )
 
-type OwnedGiftType string
-type BaseOwnedGift struct {
+// OwnedGift represents a gift owned by a user or chat.
+type OwnedGift struct {
 	Type        OwnedGiftType `json:"type"`
 	OwnerGiftID *string       `json:"owner_gift_id,omitempty"`
 	SendDate    *int          `json:"send_date,omitempty"`
 	IsSaved     *bool         `json:"is_saved,omitempty"`
-}
-type OwnedGiftRegular struct {
-	BaseOwnedGift
+
+	// Fields specific to "regular" type
 	Gift                    Gift            `json:"gift"`
 	SenderUser              User            `json:"sender_user,omitempty"`
 	Text                    string          `json:"text,omitempty"`
@@ -286,18 +364,16 @@ type OwnedGiftRegular struct {
 	PrepaidUpgradeStarCount *int            `json:"prepaid_upgrade_star_count,omitempty"`
 	IsUpgradeSeparate       *bool           `json:"is_upgrade_separate,omitempty"`
 	UniqueGiftNumber        *int            `json:"unique_gift_number,omitempty"`
-}
-type OwnedGiftUnique struct {
-	BaseOwnedGift
+
+	// Fields specific to "unique" type
 	CanBeTransferred  *bool `json:"can_be_transferred,omitempty"`
 	TransferStarCount *int  `json:"transfer_star_count,omitempty"`
 	NextTransferDate  *int  `json:"next_transfer_date,omitempty"`
 }
+
+// OwnedGifts represents a list of owned gifts with pagination.
 type OwnedGifts struct {
-	TotalCount int `json:"total_count"`
-	Gifts      []struct {
-		OwnedGiftRegular
-		OwnedGiftUnique
-	} `json:"gifts"`
-	NextOffset string `json:"next_offset"`
+	TotalCount int         `json:"total_count"`
+	Gifts      []OwnedGift `json:"gifts"`
+	NextOffset string      `json:"next_offset"`
 }

tgapi/uploader_api.go

@@ -3,118 +3,181 @@ package tgapi
 import (
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"mime/multipart"
 	"net/http"
 	"path/filepath"
+	"time"
 
 	"git.nix13.pw/scuroneko/laniakea/utils"
 	"git.nix13.pw/scuroneko/slog"
 )
 
 const (
-	UploaderPhotoType     UploaderFileType = "photo"
-	UploaderVideoType     UploaderFileType = "video"
-	UploaderAudioType     UploaderFileType = "audio"
-	UploaderDocumentType  UploaderFileType = "document"
-	UploaderVoiceType     UploaderFileType = "voice"
+	// UploaderPhotoType is the multipart field name for photo uploads.
+	UploaderPhotoType UploaderFileType = "photo"
+	// UploaderVideoType is the multipart field name for video uploads.
+	UploaderVideoType UploaderFileType = "video"
+	// UploaderAudioType is the multipart field name for audio uploads.
+	UploaderAudioType UploaderFileType = "audio"
+	// UploaderDocumentType is the multipart field name for document uploads.
+	UploaderDocumentType UploaderFileType = "document"
+	// UploaderVoiceType is the multipart field name for voice uploads.
+	UploaderVoiceType UploaderFileType = "voice"
+	// UploaderVideoNoteType is the multipart field name for video-note uploads.
 	UploaderVideoNoteType UploaderFileType = "video_note"
+	// UploaderThumbnailType is the multipart field name for thumbnail uploads.
 	UploaderThumbnailType UploaderFileType = "thumbnail"
+	// UploaderStickerType is the multipart field name for sticker uploads.
+	UploaderStickerType UploaderFileType = "sticker"
 )
 
+// UploaderFileType represents the Telegram form field name for a file upload.
 type UploaderFileType string
+
+// UploaderFile holds the data and metadata for a single file to be uploaded.
 type UploaderFile struct {
 	filename string
 	data     []byte
 	field    UploaderFileType
 }
 
+// NewUploaderFile creates a new UploaderFile, auto-detecting the field type from the file extension.
+// If detection is incorrect, use SetType to override.
 func NewUploaderFile(name string, data []byte) UploaderFile {
 	t := uploaderTypeByExt(name)
 	return UploaderFile{filename: name, data: data, field: t}
 }
 
-// SetType used when auto-detect failed.
-// i.e. you sending a voice message, but it detects as audio, or if you send audio with thumbnail
+// SetType overrides the auto-detected upload field type.
+// For example, use it when a voice file is detected as audio.
 func (f UploaderFile) SetType(t UploaderFileType) UploaderFile {
 	f.field = t
 	return f
 }
 
+// Uploader is a Telegram Bot API client specialized for multipart file uploads.
+//
+// Use Uploader methods when you need to upload binary files directly
+// (InputFile/multipart). For JSON-only calls (file_id, URL, plain params), use API.
 type Uploader struct {
 	api    *API
 	logger *slog.Logger
 }
 
+// NewUploader creates a multipart uploader bound to an API client.
 func NewUploader(api *API) *Uploader {
 	logger := slog.CreateLogger().Level(utils.GetLoggerLevel()).Prefix("UPLOADER")
 	logger.AddWriter(logger.CreateJsonStdoutWriter())
 	return &Uploader{api, logger}
 }
-func (u *Uploader) Close() error            { return u.logger.Close() }
+
+// Close flushes and closes uploader logger resources.
+// See https://core.telegram.org/bots/api
+func (u *Uploader) Close() error { return u.logger.Close() }
+
+// GetLogger returns uploader logger instance.
+// See https://core.telegram.org/bots/api
 func (u *Uploader) GetLogger() *slog.Logger { return u.logger }
 
+// UploaderRequest is a multipart file upload request to the Telegram API.
+// Use NewUploaderRequest or NewUploaderRequestWithChatID to construct one.
 type UploaderRequest[R, P any] struct {
 	method string
 	files  []UploaderFile
 	params P
+	chatId int64
 }
 
+// NewUploaderRequest creates a new multipart upload request with no associated chat ID.
 func NewUploaderRequest[R, P any](method string, params P, files ...UploaderFile) UploaderRequest[R, P] {
-	return UploaderRequest[R, P]{method, files, params}
+	return UploaderRequest[R, P]{method: method, files: files, params: params, chatId: 0}
+}
+
+// NewUploaderRequestWithChatID creates a new multipart upload request with an associated chat ID.
+// The chat ID is used for per-chat rate limiting.
+func NewUploaderRequestWithChatID[R, P any](method string, params P, chatId int64, files ...UploaderFile) UploaderRequest[R, P] {
+	return UploaderRequest[R, P]{method: method, files: files, params: params, chatId: chatId}
 }
 func (r UploaderRequest[R, P]) doRequest(ctx context.Context, up *Uploader) (R, error) {
 	var zero R
-	if up.api.limiter != nil {
-		if up.api.dropOverflowLimit {
-			if !up.api.limiter.Allow() {
-				return zero, errors.New("rate limited")
-			}
-		} else {
-			if err := up.api.limiter.Wait(ctx); err != nil {
-				return zero, err
-			}
-		}
-	}
-
-	buf, contentType, err := prepareMultipart(r.files, r.params)
-	if err != nil {
-		return zero, err
-	}
 
 	methodPrefix := ""
 	if up.api.useTestServer {
 		methodPrefix = "/test"
 	}
 	url := fmt.Sprintf("%s/bot%s%s/%s", up.api.apiUrl, up.api.token, methodPrefix, r.method)
-	req, err := http.NewRequestWithContext(ctx, "POST", url, buf)
-	if err != nil {
-		return zero, err
-	}
-	req.Header.Set("Content-Type", contentType)
-	req.Header.Set("Accept", "application/json")
-	req.Header.Set("User-Agent", fmt.Sprintf("Laniakea/%s", utils.VersionString))
 
-	up.logger.Debugln("UPLOADER REQ", r.method)
-	res, err := up.api.client.Do(req)
-	if err != nil {
-		return zero, err
-	}
-	defer res.Body.Close()
+	for {
+		if up.api.Limiter != nil {
+			if err := up.api.Limiter.Check(ctx, up.api.dropOverflowLimit, r.chatId); err != nil {
+				return zero, err
+			}
+		}
 
-	body, err := readBody(res.Body)
-	up.logger.Debugln("UPLOADER RES", r.method, string(body))
-	if res.StatusCode != http.StatusOK {
-		return zero, fmt.Errorf("unexpected status code: %d, %s", res.StatusCode, string(body))
-	}
+		buf, contentType, err := prepareMultipart(r.files, r.params)
+		if err != nil {
+			return zero, err
+		}
+		req, err := http.NewRequestWithContext(ctx, "POST", url, buf)
+		if err != nil {
+			return zero, err
+		}
+		req.Header.Set("Content-Type", contentType)
+		req.Header.Set("Accept", "application/json")
+		req.Header.Set("User-Agent", fmt.Sprintf("Laniakea/%s", utils.VersionString))
+		req.Header.Set("Accept-Encoding", "gzip")
+		req.ContentLength = int64(buf.Len())
 
-	return parseBody[R](body)
+		up.logger.Debugln("UPLOADER REQ", r.method)
+		resp, err := up.api.client.Do(req)
+		if err != nil {
+			return zero, err
+		}
+
+		body, err := readBody(resp.Body)
+		_ = resp.Body.Close()
+		if err != nil {
+			return zero, err
+		}
+		up.logger.Debugln("UPLOADER RES", r.method, string(body))
+
+		response, err := parseBody[R](body)
+		if err != nil {
+			return zero, err
+		}
+
+		if !response.Ok {
+			if response.ErrorCode == 429 && response.Parameters != nil && response.Parameters.RetryAfter != nil {
+				after := *response.Parameters.RetryAfter
+				up.logger.Warnf("Rate limited, retry after %d seconds (chat: %d)", after, r.chatId)
+				if up.api.Limiter != nil {
+					if r.chatId > 0 {
+						up.api.Limiter.SetChatLock(r.chatId, after)
+					} else {
+						up.api.Limiter.SetGlobalLock(after)
+					}
+				}
+
+				select {
+				case <-ctx.Done():
+					return zero, ctx.Err()
+				case <-time.After(time.Duration(after) * time.Second):
+					continue // Повторяем запрос
+				}
+			}
+			return zero, fmt.Errorf("[%d] %s", response.ErrorCode, response.Description)
+		}
+		return response.Result, nil
+	}
 }
+
+// DoWithContext executes the upload request asynchronously via the worker pool.
+// Returns the result or error. Respects context cancellation.
 func (r UploaderRequest[R, P]) DoWithContext(ctx context.Context, up *Uploader) (R, error) {
 	var zero R
 
-	result, err := up.api.pool.Submit(ctx, func(ctx context.Context) (any, error) {
+	result, err := up.api.pool.submit(ctx, func(ctx context.Context) (any, error) {
 		return r.doRequest(ctx, up)
 	})
 	if err != nil {
@@ -125,19 +188,24 @@ func (r UploaderRequest[R, P]) DoWithContext(ctx context.Context, up *Uploader)
 	case <-ctx.Done():
 		return zero, ctx.Err()
 	case res := <-result:
-		if res.Err != nil {
-			return zero, res.Err
+		if res.err != nil {
+			return zero, res.err
 		}
-		if val, ok := res.Value.(R); ok {
+		if val, ok := res.value.(R); ok {
 			return val, nil
 		}
 		return zero, ErrPoolUnexpected
 	}
 }
+
+// Do executes the upload request synchronously with a background context.
+// Use only for simple, non-critical uploads.
 func (r UploaderRequest[R, P]) Do(up *Uploader) (R, error) {
 	return r.DoWithContext(context.Background(), up)
 }
 
+// prepareMultipart builds a multipart form body from the given files and params.
+// Params are encoded via utils.Encode. The writer boundary is finalized before returning.
 func prepareMultipart[P any](files []UploaderFile, params P) (*bytes.Buffer, string, error) {
 	buf := bytes.NewBuffer(nil)
 	w := multipart.NewWriter(buf)
@@ -145,26 +213,33 @@ func prepareMultipart[P any](files []UploaderFile, params P) (*bytes.Buffer, str
 	for _, file := range files {
 		fw, err := w.CreateFormFile(string(file.field), file.filename)
 		if err != nil {
-			_ = w.Close()
-			return buf, w.FormDataContentType(), err
+			_ = w.Close() // Закрываем, чтобы не было утечки
+			return nil, "", err
 		}
 
 		_, err = fw.Write(file.data)
 		if err != nil {
 			_ = w.Close()
-			return buf, w.FormDataContentType(), err
+			return nil, "", err
 		}
 	}
 
-	err := utils.Encode(w, params)
+	err := utils.Encode(w, params) // Предполагается, что это записывает в w
 	if err != nil {
 		_ = w.Close()
-		return buf, w.FormDataContentType(), err
+		return nil, "", err
 	}
-	err = w.Close()
-	return buf, w.FormDataContentType(), err
+
+	err = w.Close() // ✅ ОБЯЗАТЕЛЬНО вызвать в конце — иначе запрос битый!
+	if err != nil {
+		return nil, "", err
+	}
+
+	return buf, w.FormDataContentType(), nil
 }
 
+// uploaderTypeByExt infers the Telegram upload field name from a file extension.
+// Falls back to UploaderDocumentType for unrecognized extensions.
 func uploaderTypeByExt(filename string) UploaderFileType {
 	ext := filepath.Ext(filename)
 	switch ext {

tgapi/uploader_methods.go

@@ -1,8 +1,10 @@
 package tgapi
 
+// UploadPhotoP holds parameters for uploading a photo using the Uploader.
+// See https://core.telegram.org/bots/api#sendphoto
 type UploadPhotoP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -22,14 +24,19 @@ type UploadPhotoP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadPhoto(params UploadPhotoP, file UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendPhoto", params, file)
+// SendPhoto uploads a photo via multipart and sends it as a message.
+// file is the photo file to upload.
+// See https://core.telegram.org/bots/api#sendphoto
+func (u *Uploader) SendPhoto(params UploadPhotoP, file UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendPhoto", params, params.ChatID, file)
 	return req.Do(u)
 }
 
+// UploadAudioP holds parameters for uploading an audio file using the Uploader.
+// See https://core.telegram.org/bots/api#sendaudio
 type UploadAudioP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -51,14 +58,19 @@ type UploadAudioP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadAudio(params UploadAudioP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendAudio", params, files...)
+// SendAudio uploads an audio file via multipart and sends it as a message.
+// files are the audio file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#sendaudio
+func (u *Uploader) SendAudio(params UploadAudioP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendAudio", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadDocumentP holds parameters for uploading a document using the Uploader.
+// See https://core.telegram.org/bots/api#senddocument
 type UploadDocumentP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -77,14 +89,19 @@ type UploadDocumentP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadDocument(params UploadDocumentP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendDocument", params, files...)
+// SendDocument uploads a document via multipart and sends it as a message.
+// files are the document file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#senddocument
+func (u *Uploader) SendDocument(params UploadDocumentP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendDocument", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadVideoP holds parameters for uploading a video using the Uploader.
+// See https://core.telegram.org/bots/api#sendvideo
 type UploadVideoP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -110,14 +127,19 @@ type UploadVideoP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadVideo(params UploadVideoP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendVideo", params, files...)
+// SendVideo uploads a video via multipart and sends it as a message.
+// files are the video file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#sendvideo
+func (u *Uploader) SendVideo(params UploadVideoP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendVideo", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadAnimationP holds parameters for uploading an animation using the Uploader.
+// See https://core.telegram.org/bots/api#sendanimation
 type UploadAnimationP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -141,14 +163,19 @@ type UploadAnimationP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadAnimation(params UploadAnimationP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendAnimation", params, files...)
+// SendAnimation uploads an animation via multipart and sends it as a message.
+// files are the animation file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#sendanimation
+func (u *Uploader) SendAnimation(params UploadAnimationP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendAnimation", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadVoiceP holds parameters for uploading a voice note using the Uploader.
+// See https://core.telegram.org/bots/api#sendvoice
 type UploadVoiceP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -167,14 +194,19 @@ type UploadVoiceP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadVoice(params UploadVoiceP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendVoice", params, files...)
+// SendVoice uploads a voice note via multipart and sends it as a message.
+// files are the voice file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#sendvoice
+func (u *Uploader) SendVoice(params UploadVoiceP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendVoice", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadVideoNoteP holds parameters for uploading a video note (rounded video) using the Uploader.
+// See https://core.telegram.org/bots/api#sendvideonote
 type UploadVideoNoteP struct {
 	BusinessConnectionID  string `json:"business_connection_id,omitempty"`
-	ChatID                int    `json:"chat_id"`
+	ChatID                int64  `json:"chat_id"`
 	MessageThreadID       int    `json:"message_thread_id,omitempty"`
 	DirectMessagesTopicID int    `json:"direct_messages_topic_id,omitempty"`
 
@@ -191,16 +223,24 @@ type UploadVideoNoteP struct {
 	ReplyMarkup             *ReplyMarkup             `json:"reply_markup,omitempty"`
 }
 
-func (u *Uploader) UploadVideoNote(params UploadVideoNoteP, files ...UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendVideoNote", params, files...)
+// SendVideoNote uploads a video note via multipart and sends it as a message.
+// files are the video note file(s) to upload (typically one file).
+// See https://core.telegram.org/bots/api#sendvideonote
+func (u *Uploader) SendVideoNote(params UploadVideoNoteP, files ...UploaderFile) (Message, error) {
+	req := NewUploaderRequestWithChatID[Message]("sendVideoNote", params, params.ChatID, files...)
 	return req.Do(u)
 }
 
+// UploadChatPhotoP holds parameters for uploading a chat photo using the Uploader.
+// See https://core.telegram.org/bots/api#setchatphoto
 type UploadChatPhotoP struct {
-	ChatID int `json:"chat_id"`
+	ChatID int64 `json:"chat_id"`
 }
 
-func (u *Uploader) UploadChatPhoto(params UploadChatPhotoP, photo UploaderFile) (Message, error) {
-	req := NewUploaderRequest[Message]("sendChatPhoto", params, photo)
+// SetChatPhoto uploads a new chat photo.
+// photo is the photo file to upload.
+// See https://core.telegram.org/bots/api#setchatphoto
+func (u *Uploader) SetChatPhoto(params UploadChatPhotoP, photo UploaderFile) (bool, error) {
+	req := NewUploaderRequestWithChatID[bool]("setChatPhoto", params, params.ChatID, photo)
 	return req.Do(u)
 }

tgapi/users_methods.go

@@ -1,40 +1,55 @@
 package tgapi
 
+// GetUserProfilePhotosP holds parameters for the GetUserProfilePhotos method.
+// See https://core.telegram.org/bots/api#getuserprofilephotos
 type GetUserProfilePhotosP struct {
-	UserID int `json:"user_id"`
-	Offset int `json:"offset,omitempty"`
-	Limit  int `json:"limit,omitempty"`
+	UserID int64 `json:"user_id"`
+	Offset int   `json:"offset,omitempty"`
+	Limit  int   `json:"limit,omitempty"`
 }
 
+// GetUserProfilePhotos returns a list of profile pictures for a user.
+// See https://core.telegram.org/bots/api#getuserprofilephotos
 func (api *API) GetUserProfilePhotos(params GetUserProfilePhotosP) (UserProfilePhotos, error) {
 	req := NewRequest[UserProfilePhotos]("getUserProfilePhotos", params)
 	return req.Do(api)
 }
 
+// GetUserProfileAudiosP holds parameters for the GetUserProfileAudios method.
+// See https://core.telegram.org/bots/api#getuserprofileaudios
 type GetUserProfileAudiosP struct {
-	UserID int `json:"user_id"`
-	Offset int `json:"offset,omitempty"`
-	Limit  int `json:"limit,omitempty"`
+	UserID int64 `json:"user_id"`
+	Offset int   `json:"offset,omitempty"`
+	Limit  int   `json:"limit,omitempty"`
 }
 
+// GetUserProfileAudios returns a list of profile audios for a user.
+// See https://core.telegram.org/bots/api#getuserprofileaudios
 func (api *API) GetUserProfileAudios(params GetUserProfileAudiosP) (UserProfileAudios, error) {
 	req := NewRequest[UserProfileAudios]("getUserProfileAudios", params)
 	return req.Do(api)
 }
 
+// SetUserEmojiStatusP holds parameters for the SetUserEmojiStatus method.
+// See https://core.telegram.org/bots/api#setuseremojistatus
 type SetUserEmojiStatusP struct {
-	UserID         int    `json:"user_id"`
+	UserID         int64  `json:"user_id"`
 	EmojiID        string `json:"emoji_status_custom_emoji_id,omitempty"`
 	ExpirationDate int    `json:"emoji_status_expiration_date,omitempty"`
 }
 
+// SetUserEmojiStatus sets a custom emoji status for a user.
+// Returns true on success.
+// See https://core.telegram.org/bots/api#setuseremojistatus
 func (api *API) SetUserEmojiStatus(params SetUserEmojiStatusP) (bool, error) {
 	req := NewRequest[bool]("setUserEmojiStatus", params)
 	return req.Do(api)
 }
 
+// GetUserGiftsP holds parameters for the GetUserGifts method.
+// See https://core.telegram.org/bots/api#getusergifts
 type GetUserGiftsP struct {
-	UserID                      int    `json:"user_id"`
+	UserID                      int64  `json:"user_id"`
 	ExcludeUnlimited            bool   `json:"exclude_unlimited,omitempty"`
 	ExcludeLimitedUpgradable    bool   `json:"exclude_limited_upgradable,omitempty"`
 	ExcludeLimitedNonUpgradable bool   `json:"exclude_limited_non_upgradable,omitempty"`
@@ -45,6 +60,8 @@ type GetUserGiftsP struct {
 	Limit                       int    `json:"limit,omitempty"`
 }
 
+// GetUserGifts returns gifts owned by a user.
+// See https://core.telegram.org/bots/api#getusergifts
 func (api *API) GetUserGifts(params GetUserGiftsP) (OwnedGifts, error) {
 	req := NewRequest[OwnedGifts]("getUserGifts", params)
 	return req.Do(api)

tgapi/users_types.go

@@ -1,7 +1,9 @@
 package tgapi
 
+// User represents a Telegram user or bot.
+// See https://core.telegram.org/bots/api#user
 type User struct {
-	ID                        int     `json:"id"`
+	ID                        int64   `json:"id"`
 	IsBot                     bool    `json:"is_bot"`
 	FirstName                 string  `json:"first_name"`
 	LastName                  *string `json:"last_name,omitempty"`
@@ -18,21 +20,31 @@ type User struct {
 	AllowsUsersToCreateTopics *bool   `json:"allows_users_to_create_topics,omitempty"`
 }
 
+// UserProfilePhotos represents a user's profile photos.
+// See https://core.telegram.org/bots/api#userprofilephotos
 type UserProfilePhotos struct {
 	TotalCount int           `json:"total_count"`
 	Photos     [][]PhotoSize `json:"photos"`
 }
+
+// UserProfileAudios represents a user's profile audios.
+// See https://core.telegram.org/bots/api#userprofileaudios
 type UserProfileAudios struct {
 	TotalCount int     `json:"total_count"`
 	Audios     []Audio `json:"audios"`
 }
 
+// UserRating represents a user's rating with level progression.
+// See https://core.telegram.org/bots/api#userrating
 type UserRating struct {
 	Level              int `json:"level"`
 	Rating             int `json:"rating"`
 	CurrentLevelRating int `json:"current_level_rating"`
 	NextLevelRating    int `json:"next_level_rating"`
 }
+
+// Birthdate represents a user's birthdate.
+// See https://core.telegram.org/bots/api#birthdate
 type Birthdate struct {
 	Day   int `json:"day"`
 	Month int `json:"month"`

utils.go

@@ -1,15 +1,63 @@
 package laniakea
 
-import "git.nix13.pw/scuroneko/laniakea/utils"
+import (
+	"strings"
 
+	"git.nix13.pw/scuroneko/laniakea/utils"
+)
+
+// Ptr returns a pointer to v.
 func Ptr[T any](v T) *T { return &v }
+
+// Val returns dereferenced pointer value or def when p is nil.
 func Val[T any](p *T, def T) T {
 	if p != nil {
 		return *p
 	}
 	return def
 }
-func EscapeMarkdown(s string) string   { return utils.EscapeMarkdown(s) }
-func EscapeMarkdownV2(s string) string { return utils.EscapeMarkdownV2(s) }
 
-const VersionString = utils.VersionString
+// EscapeMarkdown escapes special characters for legacy Telegram Markdown.
+// Deprecated: Use EscapeMarkdownV2.
+func EscapeMarkdown(s string) string {
+	s = strings.ReplaceAll(s, "_", `\_`)
+	s = strings.ReplaceAll(s, "*", `\*`)
+	s = strings.ReplaceAll(s, "[", `\[`)
+	return strings.ReplaceAll(s, "`", "\\`")
+}
+
+// EscapeHTML escapes special characters for Telegram HTML parse mode.
+func EscapeHTML(s string) string {
+	s = strings.ReplaceAll(s, "&", "&")
+	s = strings.ReplaceAll(s, "<", "&lt;")
+	s = strings.ReplaceAll(s, ">", "&gt;")
+	return s
+}
+
+// EscapeMarkdownV2 escapes special characters for Telegram MarkdownV2.
+// https://core.telegram.org/bots/api#markdownv2-style
+func EscapeMarkdownV2(s string) string {
+	symbols := []string{"\\", "_", "*", "[", "]", "(", ")", "~", "`", ">", "#", "+", "-", "=", "|", "{", "}", ".", "!"}
+	for _, symbol := range symbols {
+		s = strings.ReplaceAll(s, symbol, "\\"+symbol)
+	}
+	return s
+}
+
+// EscapePunctuation escapes '.', '!' and '-' for MarkdownV2 fragments.
+func EscapePunctuation(s string) string {
+	symbols := []string{".", "!", "-"}
+	for _, symbol := range symbols {
+		s = strings.ReplaceAll(s, symbol, "\\"+symbol)
+	}
+	return s
+}
+
+// Version constants mirror values from the internal utils/version package.
+const (
+	VersionString = utils.VersionString
+	VersionMajor  = utils.VersionMajor
+	VersionMinor  = utils.VersionMinor
+	VersionPatch  = utils.VersionPatch
+	VersionBeta   = utils.VersionBeta
+)

utils/limiter.go

@@ -0,0 +1,243 @@
+package utils
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"time"
+
+	"golang.org/x/time/rate"
+)
+
+var ErrDropOverflow = errors.New("drop overflow limit")
+
+// RateLimiter implements per-chat and global rate limiting with optional blocking.
+// It supports two modes:
+//   - "drop" mode: immediately reject if limits are exceeded.
+//   - "wait" mode: block until capacity is available.
+type RateLimiter struct {
+	globalLockUntil time.Time     // global cooldown timestamp (set by API errors)
+	globalLimiter   *rate.Limiter // global token bucket (30 req/sec)
+	globalMu        sync.RWMutex  // protects globalLockUntil and globalLimiter
+
+	chatLocks    map[int64]time.Time     // per-chat cooldown timestamps
+	chatLimiters map[int64]*rate.Limiter // per-chat token buckets (1 req/sec)
+	chatMu       sync.RWMutex            // protects chatLocks and chatLimiters
+}
+
+// NewRateLimiter creates a new RateLimiter with default limits.
+// Global: 30 requests per second, burst 30.
+// Per-chat: 1 request per second, burst 1.
+func NewRateLimiter() *RateLimiter {
+	return &RateLimiter{
+		globalLimiter: rate.NewLimiter(30, 30),
+		chatLimiters:  make(map[int64]*rate.Limiter),
+		chatLocks:     make(map[int64]time.Time),
+	}
+}
+
+// SetGlobalRate overrides global request-per-second limit and burst.
+// If rps <= 0, current settings are kept.
+func (rl *RateLimiter) SetGlobalRate(rps int) {
+	if rps <= 0 {
+		return
+	}
+	rl.globalMu.Lock()
+	defer rl.globalMu.Unlock()
+	rl.globalLimiter = rate.NewLimiter(rate.Limit(rps), rps)
+}
+
+// SetGlobalLock sets a global cooldown period (e.g., after receiving 429 from Telegram).
+// If retryAfter <= 0, no lock is applied.
+func (rl *RateLimiter) SetGlobalLock(retryAfter int) {
+	if retryAfter <= 0 {
+		return
+	}
+	rl.globalMu.Lock()
+	defer rl.globalMu.Unlock()
+	rl.globalLockUntil = time.Now().Add(time.Duration(retryAfter) * time.Second)
+}
+
+// SetChatLock sets a cooldown for a specific chat (e.g., after 429 for that chat).
+// If retryAfter <= 0, no lock is applied.
+func (rl *RateLimiter) SetChatLock(chatID int64, retryAfter int) {
+	if retryAfter <= 0 {
+		return
+	}
+	rl.chatMu.Lock()
+	defer rl.chatMu.Unlock()
+	rl.chatLocks[chatID] = time.Now().Add(time.Duration(retryAfter) * time.Second)
+}
+
+// GlobalWait blocks until a global request can be made.
+// Waits for both global cooldown and token bucket availability.
+func (rl *RateLimiter) GlobalWait(ctx context.Context) error {
+	if err := rl.waitForGlobalUnlock(ctx); err != nil {
+		return err
+	}
+	limiter := rl.getGlobalLimiter()
+	if limiter == nil {
+		return nil
+	}
+	return limiter.Wait(ctx)
+}
+
+// Wait blocks until a request for the given chat can be made.
+// Waits for: chat cooldown → global cooldown → chat token bucket.
+// Note: Global limit is checked *before* chat limit to avoid overloading upstream.
+func (rl *RateLimiter) Wait(ctx context.Context, chatID int64) error {
+	if err := rl.waitForChatUnlock(ctx, chatID); err != nil {
+		return err
+	}
+	if err := rl.waitForGlobalUnlock(ctx); err != nil {
+		return err
+	}
+	limiter := rl.getGlobalLimiter()
+	if limiter != nil {
+		if err := limiter.Wait(ctx); err != nil {
+			return err
+		}
+	}
+	chatLimiter := rl.getChatLimiter(chatID)
+	return chatLimiter.Wait(ctx)
+}
+
+// getGlobalLimiter returns the global limiter safely under read lock.
+func (rl *RateLimiter) getGlobalLimiter() *rate.Limiter {
+	rl.globalMu.RLock()
+	defer rl.globalMu.RUnlock()
+	return rl.globalLimiter
+}
+
+// GlobalAllow checks if a global request can be made without blocking.
+// Returns false if either global cooldown is active or token bucket is exhausted.
+func (rl *RateLimiter) GlobalAllow() bool {
+	rl.globalMu.RLock()
+	until := rl.globalLockUntil
+	rl.globalMu.RUnlock()
+
+	if !until.IsZero() && time.Now().Before(until) {
+		return false
+	}
+	limiter := rl.getGlobalLimiter()
+	if limiter == nil {
+		return true
+	}
+	return limiter.Allow()
+}
+
+// Allow checks if a request for the given chat can be made without blocking.
+// Returns false if: global cooldown, chat cooldown, global limiter, or chat limiter denies.
+// Note: Global limiter is checked before chat limiter — upstream limits take priority.
+func (rl *RateLimiter) Allow(chatID int64) bool {
+	// Check global cooldown
+	rl.globalMu.RLock()
+	globalUntil := rl.globalLockUntil
+	rl.globalMu.RUnlock()
+	if !globalUntil.IsZero() && time.Now().Before(globalUntil) {
+		return false
+	}
+
+	// Check chat cooldown
+	rl.chatMu.RLock()
+	chatUntil, ok := rl.chatLocks[chatID]
+	rl.chatMu.RUnlock()
+	if ok && !chatUntil.IsZero() && time.Now().Before(chatUntil) {
+		return false
+	}
+
+	// Check global token bucket
+	limiter := rl.getGlobalLimiter()
+	if limiter != nil && !limiter.Allow() {
+		return false
+	}
+
+	// Check chat token bucket
+	chatLimiter := rl.getChatLimiter(chatID)
+	return chatLimiter.Allow()
+}
+
+// Check applies rate limiting based on configuration.
+// If dropOverflow is true:
+//   - Immediately returns ErrDropOverflow if either global or chat limit is exceeded.
+//
+// Else:
+//   - If chatID != 0: waits for chat-specific capacity (including global limit).
+//   - If chatID == 0: waits for global capacity only.
+//
+// chatID == 0 means no specific chat context (e.g., inline query, webhook without chat).
+func (rl *RateLimiter) Check(ctx context.Context, dropOverflow bool, chatID int64) error {
+	if dropOverflow {
+		if chatID != 0 {
+			if !rl.Allow(chatID) {
+
+				return ErrDropOverflow
+			}
+		} else {
+			if !rl.GlobalAllow() {
+				return ErrDropOverflow
+			}
+		}
+	} else if chatID != 0 {
+		if err := rl.Wait(ctx, chatID); err != nil {
+			return err
+		}
+	} else {
+		if err := rl.GlobalWait(ctx); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// waitForGlobalUnlock blocks until global cooldown expires or context is done.
+// Does not check token bucket — only cooldown.
+func (rl *RateLimiter) waitForGlobalUnlock(ctx context.Context) error {
+	rl.globalMu.RLock()
+	until := rl.globalLockUntil
+	rl.globalMu.RUnlock()
+
+	if until.IsZero() || time.Now().After(until) {
+		return nil
+	}
+
+	select {
+	case <-time.After(time.Until(until)):
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
+// waitForChatUnlock blocks until the specified chat's cooldown expires or context is done.
+// Does not check token bucket — only cooldown.
+func (rl *RateLimiter) waitForChatUnlock(ctx context.Context, chatID int64) error {
+	rl.chatMu.RLock()
+	until, ok := rl.chatLocks[chatID]
+	rl.chatMu.RUnlock()
+
+	if !ok || until.IsZero() || time.Now().After(until) {
+		return nil
+	}
+
+	select {
+	case <-time.After(time.Until(until)):
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
+// getChatLimiter returns the rate limiter for the given chat, creating it if needed.
+// Uses 1 request per second with burst of 1 — conservative for per-user limits.
+func (rl *RateLimiter) getChatLimiter(chatID int64) *rate.Limiter {
+	rl.chatMu.Lock()
+	defer rl.chatMu.Unlock()
+
+	if lim, ok := rl.chatLimiters[chatID]; ok {
+		return lim
+	}
+	lim := rate.NewLimiter(1, 1)
+	rl.chatLimiters[chatID] = lim
+	return lim
+}

utils/multipart.go

@@ -1,7 +1,6 @@
 package utils
 
 import (
-	"encoding/json"
 	"fmt"
 	"io"
 	"mime/multipart"
@@ -11,6 +10,7 @@ import (
 	"strings"
 )
 
+// Encode writes struct fields into multipart form-data using json tags as field names.
 func Encode[T any](w *multipart.Writer, req T) error {
 	v := reflect.ValueOf(req)
 	if v.Kind() == reflect.Ptr {
@@ -26,37 +26,33 @@ func Encode[T any](w *multipart.Writer, req T) error {
 		field := v.Field(i)
 		fieldType := t.Field(i)
 
-		formTags := strings.Split(fieldType.Tag.Get("json"), ",")
-		fieldName := ""
-		if len(formTags) == 0 {
-			formTags = strings.Split(fieldType.Tag.Get("json"), ",")
+		jsonTag := fieldType.Tag.Get("json")
+		if jsonTag == "" {
+			jsonTag = fieldType.Name
 		}
 
-		if len(formTags) > 0 {
-			fieldName = formTags[0]
-			if fieldName == "-" {
-				continue
-			}
-			if slices.Index(formTags, "omitempty") >= 0 {
-				if field.IsZero() {
-					continue
-				}
-			}
-		} else {
-			fieldName = strings.ToLower(fieldType.Name)
+		parts := strings.Split(jsonTag, ",")
+		fieldName := parts[0]
+		if fieldName == "-" {
+			continue
+		}
+
+		// Handle omitempty
+		isEmpty := field.IsZero()
+		if slices.Contains(parts, "omitempty") && isEmpty {
+			continue
 		}
 
 		var (
 			fw  io.Writer
 			err error
 		)
+
 		switch field.Kind() {
 		case reflect.String:
-			if field.String() != "" {
-				fw, err = w.CreateFormField(fieldName)
-				if err == nil {
-					_, err = fw.Write([]byte(field.String()))
-				}
+			fw, err = w.CreateFormField(fieldName)
+			if err == nil {
+				_, err = fw.Write([]byte(field.String()))
 			}
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 			fw, err = w.CreateFormField(fieldName)
@@ -68,11 +64,17 @@ func Encode[T any](w *multipart.Writer, req T) error {
 			if err == nil {
 				_, err = fw.Write([]byte(strconv.FormatUint(field.Uint(), 10)))
 			}
-		case reflect.Float32, reflect.Float64:
+		case reflect.Float32:
+			fw, err = w.CreateFormField(fieldName)
+			if err == nil {
+				_, err = fw.Write([]byte(strconv.FormatFloat(field.Float(), 'f', -1, 32)))
+			}
+		case reflect.Float64:
 			fw, err = w.CreateFormField(fieldName)
 			if err == nil {
 				_, err = fw.Write([]byte(strconv.FormatFloat(field.Float(), 'f', -1, 64)))
 			}
+
 		case reflect.Bool:
 			fw, err = w.CreateFormField(fieldName)
 			if err == nil {
@@ -80,45 +82,51 @@ func Encode[T any](w *multipart.Writer, req T) error {
 			}
 		case reflect.Slice:
 			if field.Type().Elem().Kind() == reflect.Uint8 && !field.IsNil() {
+				// Handle []byte as file upload (e.g., thumbnail)
 				filename := fieldType.Tag.Get("filename")
 				if filename == "" {
 					filename = fieldName
 				}
-
-				ext := ""
-				filename = filename + ext
-
 				fw, err = w.CreateFormFile(fieldName, filename)
 				if err == nil {
 					_, err = fw.Write(field.Bytes())
 				}
 			} else if !field.IsNil() {
-				// Handle slice of primitive values (as multiple form fields with the same name)
+				// Handle []string, []int, etc. — send as multiple fields with same name
 				for j := 0; j < field.Len(); j++ {
 					elem := field.Index(j)
 					fw, err = w.CreateFormField(fieldName)
-					if err == nil {
-						switch elem.Kind() {
-						case reflect.String:
-							_, err = fw.Write([]byte(elem.String()))
-						case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-							_, err = fw.Write([]byte(strconv.FormatInt(elem.Int(), 10)))
-						case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-							_, err = fw.Write([]byte(strconv.FormatUint(elem.Uint(), 10)))
-						}
+					if err != nil {
+						break
+					}
+					switch elem.Kind() {
+					case reflect.String:
+						_, err = fw.Write([]byte(elem.String()))
+					case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+						_, err = fw.Write([]byte(strconv.FormatInt(elem.Int(), 10)))
+					case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+						_, err = fw.Write([]byte(strconv.FormatUint(elem.Uint(), 10)))
+					case reflect.Bool:
+						_, err = fw.Write([]byte(strconv.FormatBool(elem.Bool())))
+					case reflect.Float32:
+						_, err = fw.Write([]byte(strconv.FormatFloat(elem.Float(), 'f', -1, 32)))
+					case reflect.Float64:
+						_, err = fw.Write([]byte(strconv.FormatFloat(elem.Float(), 'f', -1, 64)))
+					default:
+						continue
+					}
+					if err != nil {
+						break
 					}
 				}
 			}
 
 		case reflect.Struct:
-			var jsonData []byte
-			jsonData, err = json.Marshal(field.Interface())
-			if err == nil {
-				fw, err = w.CreateFormField(fieldName)
-				if err == nil {
-					_, err = fw.Write(jsonData)
-				}
-			}
+			// Don't serialize structs as JSON — flatten them!
+			// Telegram doesn't support nested JSON in form-data.
+			// If you need nested data, use separate fields (e.g., ParseMode, CaptionEntities)
+			// This is a design choice — you should avoid nested structs in params.
+			return fmt.Errorf("nested structs are not supported in params — use flat fields")
 		}
 
 		if err != nil {

utils/utils.go

@@ -1,13 +1,12 @@
 package utils
 
 import (
-	"fmt"
 	"os"
-	"strings"
 
 	"git.nix13.pw/scuroneko/slog"
 )
 
+// GetLoggerLevel returns DEBUG when DEBUG=true in env, otherwise FATAL.
 func GetLoggerLevel() slog.LogLevel {
 	level := slog.FATAL
 	if os.Getenv("DEBUG") == "true" {
@@ -15,18 +14,3 @@ func GetLoggerLevel() slog.LogLevel {
 	}
 	return level
 }
-
-func EscapeMarkdown(s string) string {
-	s = strings.ReplaceAll(s, "_", `\_`)
-	s = strings.ReplaceAll(s, "*", `\*`)
-	s = strings.ReplaceAll(s, "[", `\[`)
-	return strings.ReplaceAll(s, "`", "\\`")
-}
-
-func EscapeMarkdownV2(s string) string {
-	symbols := []string{"_", "*", "[", "]", "(", ")", "~", "`", ">", "#", "+", "-", "=", "|", "{", "}", ".", "!"}
-	for _, symbol := range symbols {
-		s = strings.ReplaceAll(s, symbol, fmt.Sprintf("\\%s", symbol))
-	}
-	return s
-}

utils/version.go

@@ -1,9 +1,9 @@
 package utils
 
 const (
-	VersionString = "1.0.0-beta.4"
+	VersionString = "1.0.0-beta.22"
 	VersionMajor  = 1
 	VersionMinor  = 0
 	VersionPatch  = 0
-	Beta          = 4
+	VersionBeta   = 22
 )