decode method
Implementation
@override
Uint8List decode(String data) {
final be32 = _Bech32Codec().decode(data, maxLength);
if (be32.hrp != hrp) {
throw Exception('Invalid `hrp`. Expected $hrp got ${be32.hrp}');
}
return Uint8List.fromList(
Base32Encoder._convertBits(be32.data, 5, 8, false));
}