// Copyright 2021 IOTA Stiftung
// SPDX-License-Identifier: Apache-2.0

//! This example sends a block with a custom payload.
//!
//! Rename `.env.example` to `.env` first, then run the command:
//! ```sh
//! cargo run --release --example block_custom_payload
//! ```

use iota_sdk::{
    client::{Client, Result},
    types::block::payload::{Payload, TaggedDataPayload},
};

#[tokio::main]
async fn main() -> Result<()> {
    // This example uses secrets in environment variables for simplicity which should not be done in production.
    dotenvy::dotenv().ok();

    for var in ["NODE_URL", "EXPLORER_URL"] {
        std::env::var(var).expect(&format!(".env variable '{var}' is undefined, see .env.example"));
    }

    let node_url = std::env::var("NODE_URL").unwrap();

    // Create a node client.
    let client = Client::builder().with_node(&node_url)?.finish().await?;

    // Create a custom payload.
    let tagged_data_payload = TaggedDataPayload::new(*b"Your tag", *b"Your data")?;

    // Create and send the block with the custom payload.
    let block = client
        .build_block()
        .finish_block(Some(Payload::from(tagged_data_payload)))
        .await?;

    println!("{block:#?}");

    println!(
        "Block with custom payload sent: {}/block/{}",
        std::env::var("EXPLORER_URL").unwrap(),
        block.id()
    );

    Ok(())
}