Get Block Template Rust Example 1

get_blocktemplate.rs

use actix_web::{get, web, App, HttpResponse, HttpServer, Responder};
use bitcoincore_rpc::{Auth, Client, RpcApi};
use serde_json::Value;

struct AppState {
    btc_client: Client,
}

#[get("/blocktemplate")]
async fn get_block_template(data: web::Data<AppState>) -> impl Responder {
    // Create template request with required segwit rules
    let template_request = serde_json::json!({
        "rules": ["segwit"]
    });

    match data.btc_client.call::<Value>("getblocktemplate", &[template_request]) {
        Ok(template) => HttpResponse::Ok().json(template),
        Err(e) => {
            eprintln!("Error getting block template: {}", e);
            HttpResponse::InternalServerError().json(format!("Error: {}", e))
        }
    }
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    // Bitcoin Core RPC client setup
    let rpc_url = "http://127.0.0.1:8332";
    let auth = Auth::UserPass("test".to_string(), "test".to_string());
    
    let btc_client = Client::new(rpc_url, auth)
        .expect("Failed to create Bitcoin Core RPC client");

    // Create shared state
    let app_state = web::Data::new(AppState {
        btc_client,
    });

    println!("Starting server at http://127.0.0.1:8080");
    
    // Start actix-web server
    HttpServer::new(move || {
        App::new()
            .app_data(app_state.clone())
            .service(get_block_template)
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}