Rust

Use full service rpc for getting blockhash. Nozomi only support sendTransaction.

const NOZOMI_TIP: Pubkey = pubkey!("TEMPaMeCRFAS9EKF53Jd6KpHxgL47uWLcpFArU1Fanq");
const MIN_TIP_AMOUNT: u64 = 1_000_000;

fn send_nozomi_tx(ixs: &mut Vec<Instruction>, signer: &Keypair, rpc_client: &RpcClient) {
    let tip_ix = system_instruction::transfer(&signer.pubkey(), &NOZOMI_TIP, MIN_TIP_AMOUNT);
    ixs.push(tip_ix);

    let blockhash = rpc_client.get_latest_blockhash().unwrap();
    let tx = Transaction::new_signed_with_payer(ixs, Some(&signer.pubkey()), &[signer], blockhash);

    rpc_client.send_transaction(&tx).unwrap();
}
```