decodeAddr method

@override List<int> decodeAddr(String addr, [ Map<String, dynamic> kwargs = const {} ])

Overrides the base class method to decode a P2TR (Pay-to-Taproot) address.

This method decodes a P2TR address from the given input string using Bech32 encoding. It expects an optional map of keyword arguments, with the 'hrp' key specifying the Human-Readable Part (HRP) of the address. It validates the arguments, decodes the address, checks the witness version, and returns the decoded address as a List

Parameters:

• addr: The Bech32-encoded P2TR address to be decoded.
• kwargs: Optional keyword arguments, with 'hrp' for the Human-Readable Part.

Returns: A List

Throws:

• ArgumentException if the provided address has an incorrect witness version, or if the Bech32 checksum is invalid.

Implementation

@override
List<int> decodeAddr(String addr, [Map<String, dynamic> kwargs = const {}]) {
  /// Validate address arguments and retrieve the Human-Readable Part (HRP).
  AddrKeyValidator.validateAddressArgs<String>(kwargs, "hrp");
  final String hrp = kwargs["hrp"];

  /// Decode the Bech32-encoded P2TR address and validate its length.
  final decode = SegwitBech32Decoder.decode(hrp, addr);
  final witVerGot = decode.item1;
  final addrDecBytes = decode.item2;

  /// Validate the byte length of the decoded address.
  AddrDecUtils.validateBytesLength(
      addrDecBytes, EcdsaKeysConst.pubKeyCompressedByteLen - 1);

  /// Check the witness version.
  if (witVerGot != P2TRConst.witnessVer) {
    throw AddressConverterException(
        'Invalid witness version (expected ${P2TRConst.witnessVer}, got $witVerGot)');
  }

  /// Return the decoded P2TR address as a List<int>.
  return addrDecBytes;
}