encodeMultiKey static method

List<int> encodeMultiKey(List<SuiPublicKeyAndWeight> publicKeys, int threshold)

encode Multi Public keys to MultiKey address

Implementation

static List<int> encodeMultiKey(
    List<SuiPublicKeyAndWeight> publicKeys, int threshold) {
  try {
    if (publicKeys.isEmpty) {
      throw AddressConverterException(
          "at least one publickey required for multisig address.");
    }
    final keys = publicKeys.map((e) => e.publicKey).toSet();
    if (keys.length != publicKeys.length) {
      throw AddressConverterException("Duplicate public key detected.");
    }
    if (keys.length > SuiAddrConst.multisigAccountMaxPublicKey) {
      throw AddressConverterException(
          "Exceeded the maximum allowed public keys for a multisig account.",
          details: {
            "maximum": SuiAddrConst.multisigAccountMaxPublicKey,
            "length": publicKeys.length
          });
    }

    if (threshold < SuiAddrConst.multisigAccountMinThreshold ||
        threshold > SuiAddrConst.multisigAccountMaxThreshold) {
      throw AddressConverterException(
          "Invalid threshold. threshold must be between 1 and $mask16 .");
    }
    final sumWeight = publicKeys.fold<int>(0, (p, c) => p + c.weight);
    if (sumWeight < threshold) {
      throw AddressConverterException(
          "Sum of publickey weights must reach the threshold.");
    }
    final encode = publicKeys.map((e) => e.toBytes()).expand((e) => e);
    return hashKeyBytes(bytes: [
      ...LayoutConst.u16().serialize(threshold),
      ...encode,
    ], scheme: SuiAddrConst.multisigAddressFlag);
  } on AddressConverterException {
    rethrow;
  } catch (e) {
    throw AddressConverterException("Invalid sui Multisig address bytes.",
        details: {"error": e.toString()});
  }
}