cdk/crates/cdk/examples/p2pk.rs

use std::sync::Arc;
use std::time::Duration;

use cdk::error::Error;
use cdk::nuts::{CurrencyUnit, SecretKey, SpendingConditions};
use cdk::wallet::{ReceiveOptions, SendOptions, Wallet};
use cdk::{Amount, StreamExt};
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; 64]>();

    // Define the mint URL and currency unit
    let mint_url = "https://fake.thesimplekid.dev";
    let unit = CurrencyUnit::Sat;
    let amount = Amount::from(100);

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

    let quote = wallet.mint_quote(amount, None).await?;

    let mut proof_streams = wallet.proof_stream(
        quote,
        Default::default(),
        Default::default(),
        Duration::from_secs(10),
    );

    while let Some(proofs) = proof_streams.next().await {
        let proofs = proofs?;

        // Mint the received amount
        println!(
            "Minted nuts: {:?}",
            proofs.into_iter().map(|p| p.amount).collect::<Vec<_>>()
        );

        // Generate a secret key for spending conditions
        let secret = SecretKey::generate();

        // Create spending conditions using the generated public key
        let spending_conditions = SpendingConditions::new_p2pk(secret.public_key(), None);

        // Get the total balance of the wallet
        let bal = wallet.total_balance().await?;
        println!("Total balance: {}", bal);

        // Send a token with the specified amount and spending conditions
        let prepared_send = wallet
            .prepare_send(
                10.into(),
                SendOptions {
                    conditions: Some(spending_conditions),
                    include_fee: true,
                    ..Default::default()
                },
            )
            .await?;
        println!("Fee: {}", prepared_send.fee());
        let token = prepared_send.confirm(None).await?;

        println!("Created token locked to pubkey: {}", secret.public_key());
        println!("{}", token);

        // Receive the token using the secret key
        let amount = wallet
            .receive(
                &token.to_string(),
                ReceiveOptions {
                    p2pk_signing_keys: vec![secret],
                    ..Default::default()
                },
            )
            .await?;

        println!("Redeemed locked token worth: {}", u64::from(amount));
    }

    Ok(())
}