Omnichain

Fungible Token

1pragma solidity ^0.7.6;
2
3import "../interfaces/ILayerZeroReceiver.sol";
4import "../interfaces/ILayerZeroEndpoint.sol";
5
6contract CounterMock is ILayerZeroReceiver {
7    
8    // keep track of how many messages have been received from other chains
9    uint messageCounter; 
10
11    // required: the LayerZero endpoint which is passed in the constructor
12    ILayerZeroEndpoint public endpoint;    
13
14    // required: the LayerZero endpoint
15    constructor(address _endpoint)  {
16        endpoint = ILayerZeroEndpoint(_endpoint);
17    }
18
19    // overrides lzReceive function in ILayerZeroReceiver.
20    // automatically invoked on the receiving chain after the source chain calls endpoint.send(...)
21    function lzReceive(uint16 , bytes memory _srcCounterMockAddress, uint64 _nonce, bytes memory _payload) override external {
22        require(msg.sender == address(endpoint));
23        messageCounter += 1;
24    }
25
26    // custom function that wraps endpoint.send(...) which will 
27    // cause lzReceive() to be called on the destination chain!
28    function incrementCounter(uint16 _dstChainId, bytes calldata _dstCounterMockAddress) public payable {
29        endpoint.send{value:msg.value}(_dstChainId, _dstCounterMockAddress, bytes(""), msg.sender, address(0x0), bytes(""));
30    }
31
32}