teloxide/README.md

teloxide

A full-featured framework that empowers you to easily build Telegram bots using the async/.await syntax in Rust. It handles all the difficult stuff so you can focus only on your business logic.

Getting started

1. Create a new bot using @Botfather to get a token in the format 123456789:blablabla.
2. Initialise the TELOXIDE_TOKEN environmental variable to your token:

$ export TELOXIDE_TOKEN=MyAwesomeToken

3. Be sure that you are up to date:

$ rustup update stable

4. Execute cargo new my_bot, enter the directory and put these lines into your Cargo.toml:

[dependencies]
teloxide = "0.1.0"
pretty_env_logger = "0.3.1"
log = "0.4.8"
tokio = { version = "0.2.11", features = ["full"] }

The ping-pong bot

use teloxide::prelude::*;

use std::env::{set_var, var};

#[tokio::main]
async fn main() {
    // Configure a fancy logger. Let this bot print everything, but restrict
    // teloxide to only log errors.
    set_var("RUST_LOG", "ping_pong_bot=trace");
    set_var("RUST_LOG", "teloxide=error");
    pretty_env_logger::init();
    log::info!("Starting the ping-pong bot!");

    let bot = Bot::new(var("TELOXIDE_TOKEN").unwrap());

    // Create a dispatcher with a single message handler that answers "pong" to
    // each incoming message.
    Dispatcher::<RequestError>::new(bot)
        .message_handler(&|ctx: DispatcherHandlerCtx<Message>| async move {
            ctx.answer("pong").send().await?;
            Ok(())
        })
        .dispatch()
        .await;
}