Imports github.com/btcsuite/btcd/btcec github.com/btcsuite/btcd/chaincfg github.com/btcsuite/btcd/chaincfg/chainhash github.com/btcsuite/btcd/txscript github.com/btcsuite/btcd/wire github.com/btcsuite/btcutil golang.org/x/crypto/ripemd160 Standard library imports bytes crypto/ecdsa crypto/elliptic crypto/sha256 encoding/hex errors fmt log math/big