Imports github.com/ExpanderNet/btcd/btcutil/er github.com/decred/dcrd/dcrec/secp256k1/v4 Standard library imports bytes compress/zlib crypto/aes crypto/cipher crypto/ecdsa crypto/elliptic crypto/hmac crypto/rand crypto/sha256 crypto/sha512 encoding/base64 encoding/binary encoding/hex errors fmt hash io io/ioutil math/big strings sync