ferogram 0.6.5

A native, elegant, and asynchronous MTProto framework in Rust for Telegram clients, bots, and applications.
Documentation 
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/*
 * Copyright (c) 2026 Ankit Chaubey <ankitchaubey.dev@gmail.com>
 * https://github.com/ankit-chaubey
 *
 * Project: ferogram
 * Website: https://ferogram.dev
 *
 * Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 * https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 * <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
 * This file may not be copied, modified, or distributed except according
 * to those terms.
 */

//! Userbot that connects from a string session, no session file needed.
//!
//! Useful for serverless environments or anywhere you cannot persist files
//! to disk. The session string is read from SESSION_STRING at startup.
//!
//! Generate a session string first:
//!   cargo run --example string_session_gen
//!
//! Then run:
//!   SESSION_STRING="..." cargo run --example serverless_userbot

use ferogram::Client;

const API_ID: i32 = 0; // fill in from https://my.telegram.org
const API_HASH: &str = ""; // fill in from https://my.telegram.org

#[tokio::main]
async fn main() {
    if let Err(e) = run().await {
        eprintln!("error: {e}");
        std::process::exit(1);
    }
}

async fn run() -> Result<(), Box<dyn std::error::Error>> {
    if API_ID == 0 || API_HASH.is_empty() {
        eprintln!("Fill in API_ID and API_HASH at the top of serverless_userbot.rs");
        std::process::exit(1);
    }

    let session_string = std::env::var("SESSION_STRING")
        .map_err(|_| "SESSION_STRING not set. Run string_session_gen first.")?;

    let (client, _shutdown) = Client::builder()
        .api_id(API_ID)
        .api_hash(API_HASH)
        .session_string(session_string)
        .connect()
        .await?;

    let me = client.get_me().await?;
    println!(
        "Logged in as {} ({})",
        me.first_name.as_deref().unwrap_or("?"),
        me.id
    );

    client
        .send_message("me", "ferogram string session works.")
        .await?;

    Ok(())
}