let mut payment_hash = PaymentHash([0; 32]);
payment_hash.0[0..8].copy_from_slice(&be64_to_array(payments_sent));
let mut sha = Sha256::engine();
let mut payment_hash = PaymentHash([0; 32]);
payment_hash.0[0..8].copy_from_slice(&be64_to_array(payments_sent));
let mut sha = Sha256::engine();