use bitcoin::hashes::sha256d::Hash as Sha256dHash;
use bitcoin::hashes::Hash;
use bitcoin::hashes::hex::FromHex;
-use bitcoin::network::constants::Network;
+use bitcoin::network::Network;
use bitcoin::secp256k1::{PublicKey,SecretKey};
use bitcoin::secp256k1::{Secp256k1, All};