base-x
Fast base encoding / decoding of any given alphabet using bitcoin style leading zero compression.
WARNING: This module is NOT RFC3548 compliant, it cannot be used for base16 (hex), base32, or base64 encoding in a standards compliant manner.
Example
Base58
import 'package:base_x/base_x.dart';
var base58 = BaseXCodec('123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
var hash = Uint8List.fromList([14, 251, 24, 220, 202, 235, 97, 232, 85, 229, 109, 188, 53, 146, 43, 36, 246, 238, 110, 55, 202, 163, 160, 123, 169, 35]);
print(base58.encode(hash));
///TcASfmyoFiNobNaCHeiPMkWgGmovoxk1sqk
print(base58.decode('TcASfmyoFiNobNaCHeiPMkWgGmovoxk1sqk'));
///[14, 251, 24, 220, 202, 235, 97, 232, 85, 229, 109, 188, 53, 146, 43, 36, 246, 238, 110, 55, 202, 163, 160, 123, 169, 35]
Alphabets
See below for a list of commonly recognized alphabets, and their respective base.
| Base | Alphabet |
|---|---|
| 2 | 01 |
| 8 | 01234567 |
| 11 | 0123456789a |
| 16 | 0123456789abcdef |
| 32 | 0123456789ABCDEFGHJKMNPQRSTVWXYZ |
| 32 | ybndrfg8ejkmcpqxot1uwisza345h769 (z-base-32) |
| 36 | 0123456789abcdefghijklmnopqrstuvwxyz |
| 58 | 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz |
| 62 | 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ |
| 64 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ |
| 66 | ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.!~ |
LICENSE MIT
A direct derivation of the base58 implementation from bitcoin/bitcoin, generalized for variable length alphabets.