package base58 import ( "bytes" "errors" "github.com/mr-tron/base58" "github.com/nspcc-dev/neo-go/pkg/crypto/hash" ) // CheckDecode implements a base58-encoded string decoding with hash-based // checksum check. func CheckDecode(s string) (b []byte, err error) { b, err = base58.Decode(s) if err != nil { return nil, err } if len(b) < 5 { return nil, errors.New("invalid base-58 check string: missing checksum") } if !bytes.Equal(hash.Checksum(b[:len(b)-4]), b[len(b)-4:]) { return nil, errors.New("invalid base-58 check string: invalid checksum") } // Strip the 4 byte long hash. b = b[:len(b)-4] return b, nil } // CheckEncode encodes given byte slice into a base58 string with hash-based // checksum appended to it. func CheckEncode(b []byte) string { b = append(b, hash.Checksum(b)...) return base58.Encode(b) }