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Many methods in Gogram return interface types that can have multiple implementations. You need to use type assertions or type switches to access the concrete type.

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Example 1: AttachMenuBots

The AttachMenuBots interface has two possible implementations:
result, err := client.MessagesGetAttachMenuBots(ctx, &telegram.MessagesGetAttachMenuBotsParams{
    Hash: 0,
})
if err != nil {
    log.Fatal(err)
}

// Type switch to handle different implementations
switch bots := result.(type) {
case *telegram.AttachMenuBotsObj:
    fmt.Printf("Hash: %d\n", bots.Hash)
    fmt.Printf("Found %d bots\n", len(bots.Bots))
    for _, bot := range bots.Bots {
        fmt.Printf("Bot: %v\n", bot)
    }
    
case *telegram.AttachMenuBotsNotModified:
    fmt.Println("Bot list hasn't changed")
    
default:
    fmt.Printf("Unexpected type: %T\n", result)
}

​
Example 2: MessagesMessages

The MessagesMessages interface has four possible implementations:
messages, err := client.MessagesGetHistory(ctx, &telegram.MessagesGetHistoryParams{
    Peer:  peer,
    Limit: 100,
})
if err != nil {
    log.Fatal(err)
}

// Type switch to handle different implementations
switch m := messages.(type) {
case *telegram.MessagesMessagesObj:
    fmt.Printf("Total messages: %d\n", len(m.Messages))
    for _, msg := range m.Messages {
        fmt.Printf("Message: %v\n", msg)
    }
    
case *telegram.MessagesMessagesSlice:
    fmt.Printf("Total count: %d\n", m.Count)
    fmt.Printf("Loaded %d messages\n", len(m.Messages))
    if m.Inexact {
        fmt.Println("Results may be inexact")
    }
    
case *telegram.MessagesChannelMessages:
    fmt.Printf("Channel messages - Total: %d\n", m.Count)
    fmt.Printf("PTS: %d\n", m.Pts)
    fmt.Printf("Offset: %d\n", m.OffsetIDOffset)
    
case *telegram.MessagesMessagesNotModified:
    fmt.Printf("No new messages (count: %d)\n", m.Count)
    
default:
    fmt.Printf("Unexpected type: %T\n", messages)
}
Use type switches (switch v := result.(type)) when you need to handle multiple possible implementations. Use type assertions (result.(*ConcreteType)) only when you’re certain of the type.
This happens when Telegram assumes you already have the access hash for a peer and sends incomplete data. Enable caching to prevent this:
client, err := telegram.NewClient(telegram.ClientConfig{
    AppID:   6,
    AppHash: "your_app_hash",
    // Cache is enabled by default
})
See the Cache documentation for more details.
Go 1.18 or higher is required for generics support.
YES - Gogram is stable and being used in production by many projects.
  • Goroutines: ~10 - 12 goroutines
  • Memory: 10-20 MB RAM usage
Join the Telegram Support Group for help, questions, and discussions.
Gogram supports the following proxy types:
  • SOCKS5
  • SOCKS4
  • HTTP/HTTPS
  • MTProto (FakeTLS, Obfuscated, Classic)
For more details, see the Proxy documentation.
Gogram is tested and works on:
  • Linux
  • Windows
  • macOS
  • ARM (Raspberry Pi, etc.)
  • WebAssembly (WASM) - Use WebSocket connections