Base58Check Encoding

Bitcoin addresses are encoded using Base58Check:

1. data = version || payload
2. checksum = SHA256(SHA256(data))[:4]
3. address = Base58Encode(data || checksum)

Base58 alphabet:

123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz

Leading zero bytes in data || checksum are encoded as leading 1 characters.

Functions

func Base58CheckEncode(version byte, payload []byte) string
func Base58CheckDecode(addr string) (version byte, payload []byte, ok bool)

Notes

• Base58CheckDecode returns ok=false for invalid characters or checksum.
• The decoded payload excludes the version byte and 4-byte checksum.
• If the decoded byte slice is shorter than 5 bytes (version + checksum), return ok=false.