CheckDecode decodes a string that was encoded with CheckEncode and verifies the checksum.

CheckEncode prepends a version byte and appends a four byte checksum.

Decode decodes a modified base58 string to a byte slice.

Encode encodes a byte slice to a modified base58 string.

ErrChecksum indicates that the checksum of a check-encoded string does not verify against the checksum.

ErrInvalidFormat indicates that the check-encoded string has an invalid format.