let secp_ctx = Secp256k1::new();
let network = Network::Testnet;
let node_1_privkey = SecretKey::from_slice(&[42; 32]).unwrap();
let secp_ctx = Secp256k1::new();
let network = Network::Testnet;
let node_1_privkey = SecretKey::from_slice(&[42; 32]).unwrap();