Imports github.com/EXCCoin/base58 github.com/EXCCoin/exccd/chaincfg/chainhash github.com/EXCCoin/exccd/dcrec/secp256k1/v4 github.com/EXCCoin/exccd/dcrutil/v4 Standard library imports bytes crypto/hmac crypto/rand crypto/sha512 encoding/binary errors fmt