function receive_cross_chain_msg(
uint256 /**txid */,
string memory from_chain,
uint256 /**from_address */,
uint256 from_handler,
PayloadType payload_type,
bytes calldata payload,
uint8 /**sign type */,
bytes calldata /**signaturs */
) external onlySettlement returns (bool) {
//  from_handler need in whitelist
if (is_valid_handler(from_chain, from_handler) == false) {
    return false;
}
bytes calldata msg_payload = MessageV1Codec.payload(payload);

require(isValidPayloadType(payload_type), "Invalid payload type");

if (payload_type == PayloadType.ERC20) {
    // Cross chain transfer
    {
    // Decode transfer payload
            ERC20TransferPayload memory transfer_payload = codec
                .deocde_transfer(msg_payload);

            if (mode == SettlementMode.MintBurn) {
                _erc20_mint(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            } else if (mode == SettlementMode.LockUnlock) {
                _erc20_unlock(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );

                return true;
            } else if (mode == SettlementMode.LockMint) {
                _erc20_mint(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            } else if (mode == SettlementMode.BurnUnlock) {
                _erc20_unlock(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            }
        }
    }

    return false;
}
function receive_cross_chain_msg(
uint256 /**txid */,
string memory from_chain,
uint256 /**from_address */,
uint256 from_handler,
PayloadType payload_type,
bytes calldata payload,
uint8 /**sign type */,
bytes calldata /**signaturs */
) external onlySettlement returns (bool) {
//  from_handler need in whitelist
if (is_valid_handler(from_chain, from_handler) == false) {
    return false;
}
bytes calldata msg_payload = MessageV1Codec.payload(payload);

- require(isValidPayloadType(payload_type), "Invalid payload type");

if (payload_type == PayloadType.ERC20) {
    // Cross chain transfer
    {
    // Decode transfer payload
            ERC20TransferPayload memory transfer_payload = codec
                .deocde_transfer(msg_payload);

            if (mode == SettlementMode.MintBurn) {
                _erc20_mint(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            } else if (mode == SettlementMode.LockUnlock) {
                _erc20_unlock(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );

                return true;
            } else if (mode == SettlementMode.LockMint) {
                _erc20_mint(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            } else if (mode == SettlementMode.BurnUnlock) {
                _erc20_unlock(
                    AddressCast.to_address(transfer_payload.to),
                    transfer_payload.amount
                );
                return true;
            }
        }
    }
+ else {
+	   revert("Currently unsupported");
+ }

    return false;
}
