cdk/crates/cdk/examples/mint-token.rs

use std::sync::Arc;

use cdk::amount::SplitTarget;
use cdk::error::Error;
use cdk::nuts::nut00::ProofsMethods;
use cdk::nuts::{CurrencyUnit, MintQuoteState, NotificationPayload};
use cdk::wallet::{SendOptions, Wallet, WalletSubscription};
use cdk::Amount;
use cdk_sqlite::wallet::memory;
use rand::random;
use tracing_subscriber::EnvFilter;

#[tokio::main]
async fn main() -> Result<(), Error> {
    let default_filter = "debug";

    let sqlx_filter = "sqlx=warn,hyper_util=warn,reqwest=warn,rustls=warn";

    let env_filter = EnvFilter::new(format!("{},{}", default_filter, sqlx_filter));

    // Parse input
    tracing_subscriber::fmt().with_env_filter(env_filter).init();

    // Initialize the memory store for the wallet
    let localstore = Arc::new(memory::empty().await?);

    // Generate a random seed for the wallet
    let seed = random::<[u8; 32]>();

    // Define the mint URL and currency unit
    let mint_url = "https://fake.thesimplekid.dev";
    let unit = CurrencyUnit::Sat;
    let amount = Amount::from(10);

    // Create a new wallet
    let wallet = Wallet::new(mint_url, unit, localstore, &seed, None)?;

    // Request a mint quote from the wallet
    let quote = wallet.mint_quote(amount, None).await?;
    println!("Quote: {:#?}", quote);

    // Subscribe to updates on the mint quote state
    let mut subscription = wallet
        .subscribe(WalletSubscription::Bolt11MintQuoteState(vec![quote
            .id
            .clone()]))
        .await;

    // Wait for the mint quote to be paid
    while let Some(msg) = subscription.recv().await {
        if let NotificationPayload::MintQuoteBolt11Response(response) = msg {
            if response.state == MintQuoteState::Paid {
                break;
            }
        }
    }

    // Mint the received amount
    let proofs = wallet.mint(&quote.id, SplitTarget::default(), None).await?;
    let receive_amount = proofs.total_amount()?;
    println!("Received {} from mint {}", receive_amount, mint_url);

    // Send a token with the specified amount
    let prepared_send = wallet.prepare_send(amount, SendOptions::default()).await?;
    let token = wallet.send(prepared_send, None).await?;
    println!("Token:");
    println!("{}", token);

    Ok(())
}