decodeAddr method

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

Overrides the base class method to decode a P2PKH (Pay-to-Public-Key-Hash) address using bch Bech32 encoding.

This method decodes a P2PKH address from the provided input string using Bech32 encoding. It expects an optional map of keyword arguments with 'net_ver' specifying the network version bytes and 'hrp' for the Human-Readable Part (HRP). It validates the arguments, decodes the Bech32 address, checks its network version, length, and checksum, and returns the decoded P2PKH address as a List

Parameters:

  • addr: The Bech32-encoded P2PKH address to be decoded.
  • kwargs: Optional keyword arguments with 'net_ver' for the network version and 'hrp' for HRP.

Returns: A List

Implementation

@override
List<int> decodeAddr(String addr, [Map<String, dynamic> kwargs = const {}]) {
  /// Validate network version and HRP arguments.
  AddrKeyValidator.validateAddressArgs<List<int>>(kwargs, "net_ver");
  AddrKeyValidator.validateAddressArgs<String>(kwargs, "hrp");
  final String hrp = kwargs["hrp"];
  final List<int> netVerBytes = kwargs["net_ver"];

  /// Decode the Bech32 address and retrieve network version and decoded bytes.
  final result = BchBech32Decoder.decode(hrp, addr);
  List<int> netVerBytesGot = result.item1;
  List<int> addrDecBytes = result.item2;

  /// Validate that the decoded network version matches the expected network version.
  if (!BytesUtils.bytesEqual(netVerBytes, netVerBytesGot)) {
    throw const AddressConverterException("Invalid net version");
  }

  /// Validate the length of the decoded address.
  AddrDecUtils.validateBytesLength(
      addrDecBytes, QuickCrypto.hash160DigestSize);
  return addrDecBytes;
}