Channel

A channel is a logical connection over cross-chain network. It used for cross-chain message transfer.

Accepts messages to be dispatched to destination chains, constructs a Merkle tree of the messages.
Dispatches verified messages from source chains.

State Variables

msgHash => isDispathed.

mapping(bytes32 => bool) public dones;

message count.

uint256 public count;

Self contract address cache.

address private immutable __self = address(this);

Init code.

constructor(address dao) UserConfig(dao);

Fetch local chain id.

function LOCAL_CHAINID() public view returns (uint256);

Returns

Name	Type	Description
`<none>`	`uint256`	chainId Local chain id.

Send message.

function _send(address from, uint256 toChainId, address to, uint256 gasLimit, bytes calldata encoded)
    internal
    returns (bytes32);

Parameters

Name	Type	Description
`from`	`address`	User application contract address which send the message.
`toChainId`	`uint256`	The Message destination chain id.
`to`	`address`	User application contract address which receive the message.
`gasLimit`	`uint256`	Gas limit for destination user application used.
`encoded`	`bytes`	The calldata which encoded by ABI Encoding.

Only message.to's config relayer could relay this message.

Receive messages.

function _recv(Message calldata message, bytes calldata proof) internal returns (bytes32);

Parameters

Name	Type	Description
`message`	`Message`	Received message info.
`proof`	`bytes`	Message proof of this message.

Notifies an observer that the message has been accepted.

event MessageAccepted(bytes32 indexed msgHash, Message message);

Parameters

Name	Type	Description
`msgHash`	`bytes32`	Hash of the message.
`message`	`Message`	Accepted message info.

Notifies an observer that the message has been dispatched.

event MessageDispatched(bytes32 indexed msgHash, bool dispatchResult);

Parameters

Name	Type	Description
`msgHash`	`bytes32`	Hash of the message.
`dispatchResult`	`bool`	The message dispatch result.