Interop 메시지 전달 튜토리얼

./supersim --interop.autorelay

mkdir onchain-code
cd onchain-code
forge init

    //SPDX-License-Identifier: MIT
    pragma solidity ^0.8.0;

    contract Greeter {
        string greeting;

        event SetGreeting(
            address indexed sender,     // msg.sender
            string greeting
        );

        function greet() public view returns (string memory) {
            return greeting;
        }

        function setGreeting(string memory _greeting) public {
            greeting = _greeting;
            emit SetGreeting(msg.sender, _greeting);
        }
    }

GREETER_B_ADDRESS=`forge create --rpc-url $URL_CHAIN_B --private-key $PRIVATE_KEY Greeter --broadcast | awk '/Deployed to:/ {print $3}'`

cd lib
npm install @eth-optimism/contracts-bedrock
cd ..
echo @eth-optimism/=lib/node_modules/@eth-optimism/ >> remappings.txt

    //SPDX-License-Identifier: MIT
    pragma solidity ^0.8.0;

    import { Predeploys } from "@eth-optimism/contracts-bedrock/src/libraries/Predeploys.sol";
    import { IL2ToL2CrossDomainMessenger } from "@eth-optimism/contracts-bedrock/src/L2/IL2ToL2CrossDomainMessenger.sol";

    import { Greeter } from "src/Greeter.sol";

    contract GreetingSender {
        IL2ToL2CrossDomainMessenger public immutable messenger =
            IL2ToL2CrossDomainMessenger(Predeploys.L2_TO_L2_CROSS_DOMAIN_MESSENGER);

        address immutable greeterAddress;
        uint256 immutable greeterChainId;

        constructor(address _greeterAddress, uint256 _greeterChainId) {
            greeterAddress = _greeterAddress;
            greeterChainId = _greeterChainId;
        }

        function setGreeting(string calldata greeting) public {
            bytes memory message = abi.encodeCall(
                Greeter.setGreeting,
                (greeting)
            );
            messenger.sendMessage(greeterChainId, greeterAddress, message);
        }
    }

CHAIN_ID_B=`cast chain-id --rpc-url $URL_CHAIN_B`
GREETER_A_ADDRESS=`forge create --rpc-url $URL_CHAIN_A --private-key $PRIVATE_KEY --broadcast GreetingSender --constructor-args $GREETER_B_ADDRESS $CHAIN_ID_B | awk '/Deployed to:/ {print $3}'`

    //SPDX-License-Identifier: MIT
    pragma solidity ^0.8.0;

    import { Predeploys } from "@eth-optimism/contracts-bedrock/src/libraries/Predeploys.sol";

    interface IL2ToL2CrossDomainMessenger {
        function crossDomainMessageContext() external view returns (address sender_, uint256 source_);
    }

    contract Greeter {

        IL2ToL2CrossDomainMessenger public immutable messenger =
            IL2ToL2CrossDomainMessenger(Predeploys.L2_TO_L2_CROSS_DOMAIN_MESSENGER);

        string greeting;

        event SetGreeting(
            address indexed sender,     // msg.sender
            string greeting
        );

        event CrossDomainSetGreeting(
            address indexed sender,   // Sender on the other side
            uint256 indexed chainId,  // ChainID of the other side
            string greeting
        );

        function greet() public view returns (string memory) {
            return greeting;
        }

        function setGreeting(string memory _greeting) public {
            greeting = _greeting;
            emit SetGreeting(msg.sender, _greeting);

            if (msg.sender == Predeploys.L2_TO_L2_CROSS_DOMAIN_MESSENGER) {
                (address sender, uint256 chainId) =
                    messenger.crossDomainMessageContext();
                emit CrossDomainSetGreeting(sender, chainId, _greeting);
            }
        }
    }

GREETER_B_ADDRESS=`forge create --rpc-url $URL_CHAIN_B --private-key $PRIVATE_KEY Greeter --broadcast | awk '/Deployed to:/ {print $3}'`
GREETER_A_ADDRESS=`forge create --rpc-url $URL_CHAIN_A --private-key $PRIVATE_KEY --broadcast GreetingSender --constructor-args $GREETER_B_ADDRESS $CHAIN_ID_B | awk '/Deployed to:/ {print $3}'`

cast call --rpc-url $URL_CHAIN_B $GREETER_B_ADDRESS "greet()" | cast --to-ascii
cast send --private-key $PRIVATE_KEY --rpc-url $URL_CHAIN_A $GREETER_A_ADDRESS "setGreeting(string)" "Hello from chain A, with a CrossDomainSetGreeting event"
sleep 4
cast call --rpc-url $URL_CHAIN_B $GREETER_B_ADDRESS "greet()" | cast --to-ascii

cast logs --rpc-url $URL_CHAIN_B 'CrossDomainSetGreeting(address,uint256,string)'
echo $GREETER_A_ADDRESS
echo 0x385=`echo 0x385 | cast --to-dec`
echo 0x190a85c0=`echo 0x190a85c0 | cast --to-dec`