encodeMultiKey static method

List<int> encodeMultiKey(List<IPublicKey> publicKeys, int requiredSignature)

encode Multi Public keys to MultiKey address

Implementation

static List<int> encodeMultiKey(
  List<IPublicKey> publicKeys,
  int requiredSignature,
) {
  try {
    final pubkeyLayoutStruct =
        publicKeys.map((e) {
          return switch (e.curve) {
            EllipticCurveTypes.secp256k1 => {e.curve.name: e.uncompressed},
            EllipticCurveTypes.ed25519 => {
              e.curve.name: e.compressed.sublist(1),
            },
            _ =>
              throw AddressConverterException.addressKeyValidationFailed(
                reason: "Unsupported ${e.curve.name} public key.",
              ),
          };
        }).toList();
    final keys = publicKeys.toSet();
    if (keys.length != publicKeys.length) {
      throw AddressConverterException.addressKeyValidationFailed(
        network: "Aptos",
        reason: "Duplicate public key detected.",
      );
    }
    if (publicKeys.length < AptosAddrConst.multikeyMinPublicKey ||
        publicKeys.length > AptosAddrConst.multikeyMaxPublicKey) {
      throw AddressConverterException.addressKeyValidationFailed(
        network: "Aptos",
        reason:
            "The number of public keys provided is invalid. It must be between ${AptosAddrConst.multikeyMinPublicKey} and ${AptosAddrConst.multikeyMaxPublicKey}.",
      );
    }

    if (requiredSignature < AptosAddrConst.minthreshold ||
        requiredSignature > AptosAddrConst.multiKeyMaxSignature) {
      throw AddressConverterException.addressKeyValidationFailed(
        network: "Aptos",
        reason:
            "Invalid threshold. The threshold must be between ${AptosAddrConst.minthreshold} and ${AptosAddrConst.multiKeyMaxSignature}.",
      );
    }
    if (publicKeys.length < requiredSignature) {
      throw AddressConverterException.addressKeyValidationFailed(
        network: "Aptos",
        reason:
            "The number of public keys must be at least equal to the required signatures.",
      );
    }
    final layoutStruct = {
      "requiredSignature": requiredSignature,
      "publicKeys": pubkeyLayoutStruct,
    };
    final encode = AptosAddrConst.multiKeyAddressLayout.serialize(
      layoutStruct,
    );
    return hashKeyBytes(
      bytes: encode,
      scheme: AptosAddrConst.multikeyAddressFlag,
    );
  } on AddressConverterException {
    rethrow;
  } catch (e) {
    throw AddressConverterException.addressBytesValidationFailed(
      network: "Aptos",
      details: {"error": e.toString()},
    );
  }
}