Message Structure

src/libraries/Message.sol

The MessageLibrary library contract provides a data structure that represents a message for a remote call to a target contract on a destination chain.

    struct Message {
        uint256 srcChainId;
        uint256 dstChainId;
        address target;
        uint256 nonce;
        bytes callData;
        uint256 nativeValue;
        uint256 expiration;
    }

Each of these fields is described in further detail below:

• srcChainId is the ID of the chain where this message is sent from

• dstChainId: The ID of the chain where the message is sent to.

• target: The address of the contract to be called on the destination chain.

• nonce: An incrementing number held by MultiBridgeMessageSender to ensure msgId uniqueness.

• callData: The data to be sent to the target contract by low-level call (e.g., address(target).call(callData)).

• nativeValue is the native token value to be sent to the target in the low-level call(eg. address(target).call{value: nativeValue}(callData))

• expiration: is the timestamp when the message expires