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// Copyright 2022 IOTA Stiftung
// SPDX-License-Identifier: Apache-2.0
//! In this example we will melt an existing native token with its foundry.
//! Rename `.env.example` to `.env` first.
//!
//! `cargo run --example decrease_native_token_supply --release`
use std::str::FromStr;
use iota_sdk::{
types::block::output::TokenId,
wallet::{Result, Wallet, U256},
};
#[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();
// Create the wallet
let wallet = Wallet::builder().finish().await?;
// Get the account we generated with `01_create_wallet`
let account = wallet.get_account("Alice").await?;
// May want to ensure the account is synced before sending a transaction.
account.sync(None).await?;
let balance = account.balance().await?;
println!("Balance before melting:\n{balance:?}",);
// Set the stronghold password
wallet
.set_stronghold_password(&std::env::var("STRONGHOLD_PASSWORD").unwrap())
.await?;
// Replace with a TokenId that is available in the account, the foundry output which minted it, also needs to be
// available.
let token_id = TokenId::from_str("0x08847bd287c912fadedb6bf38900bda9f2d377b75b2a0bece8738699f56ebca4130100000000")?;
// Melt some of the circulating supply
let melt_amount = U256::from(10);
let transaction = account
.decrease_native_token_supply(token_id, melt_amount, None)
.await?;
println!("Transaction sent: {}", transaction.transaction_id);
let block_id = account
.retry_transaction_until_included(&transaction.transaction_id, None, None)
.await?;
println!(
"Block included: {}/block/{}",
std::env::var("EXPLORER_URL").unwrap(),
block_id
);
let balance = account.sync(None).await?;
println!("Balance after melting:\n{balance:?}",);
Ok(())
}