Reorg of cross-chain messaging contracts (#173)

messaging/erc20/README.md

@@ -0,0 +1,30 @@
+# Hardhat Template for ZetaChain
+
+This is a simple Hardhat template that provides a starting point for developing
+smart contract applications on ZetaChain.
+
+## Prerequisites
+
+Before getting started, ensure that you have
+[Node.js](https://nodejs.org/en/download) (version 18 or above) and
+[Yarn](https://yarnpkg.com/) installed on your system.
+
+## Getting Started
+
+To get started, install the necessary dependencies:
+
+```
+yarn
+```
+
+## Hardhat Tasks
+
+This template includes Hardhat tasks that streamline smart contract development.
+Learn more about the template and the functionality it provides
+[in the docs](https://www.zetachain.com/docs/developers/template/).
+
+## Next Steps
+
+To learn more about building decentralized apps on ZetaChain, follow the
+tutorials available in
+[the introduction to ZetaChain](https://www.zetachain.com/docs/developers/overview/).

messaging/counter/contracts/Counter.sol → messaging/erc20/contracts/CrossChainERC20.sol

@@ -5,30 +5,34 @@ import "@openzeppelin/contracts/interfaces/IERC20.sol";
 import "@openzeppelin/contracts/access/Ownable.sol";
 import "@zetachain/protocol-contracts/contracts/evm/tools/ZetaInteractor.sol";
 import "@zetachain/protocol-contracts/contracts/evm/interfaces/ZetaInterfaces.sol";
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
 
-contract Counter is ZetaInteractor, ZetaReceiver {
-    error InvalidMessageType();
-    error DecrementOverflow();
+contract CrossChainERC20 is ERC20, ERC20Burnable, ZetaInteractor, ZetaReceiver {
+    error InsufficientBalance();
 
-    event CounterEvent(address);
-    event CounterRevertedEvent(address);
-    mapping(address => uint256) public counter;
+    event CrossChainERC20Event(address, uint256);
+    event CrossChainERC20RevertedEvent(address, uint256);
 
-    bytes32 public constant COUNTER_MESSAGE_TYPE =
-        keccak256("CROSS_CHAIN_COUNTER");
     ZetaTokenConsumer private immutable _zetaConsumer;
     IERC20 internal immutable _zetaToken;
 
     constructor(
         address connectorAddress,
         address zetaTokenAddress,
         address zetaConsumerAddress
-    ) ZetaInteractor(connectorAddress) {
+    ) ERC20("CrossChain Token", "CCT") ZetaInteractor(connectorAddress) {
         _zetaToken = IERC20(zetaTokenAddress);
         _zetaConsumer = ZetaTokenConsumer(zetaConsumerAddress);
+
+        _mint(msg.sender, 1000000 * 10 ** decimals());
     }
 
-    function sendMessage(uint256 destinationChainId) external payable {
+    function sendMessage(
+        uint256 destinationChainId,
+        address to,
+        uint256 value
+    ) external payable {
         if (!_isValidChainId(destinationChainId))
             revert InvalidDestinationChainId();
 
@@ -38,12 +42,15 @@ contract Counter is ZetaInteractor, ZetaReceiver {
         }(address(this), crossChainGas);
         _zetaToken.approve(address(connector), zetaValueAndGas);
 
+        if (balanceOf(msg.sender) < value) revert InsufficientBalance();
+        _burn(msg.sender, value);
+
         connector.send(
             ZetaInterfaces.SendInput({
                 destinationChainId: destinationChainId,
                 destinationAddress: interactorsByChainId[destinationChainId],
                 destinationGasLimit: 300000,
-                message: abi.encode(COUNTER_MESSAGE_TYPE, msg.sender),
+                message: abi.encode(to, value, msg.sender),
                 zetaValueAndGas: zetaValueAndGas,
                 zetaParams: abi.encode("")
             })
@@ -53,29 +60,26 @@ contract Counter is ZetaInteractor, ZetaReceiver {
     function onZetaMessage(
         ZetaInterfaces.ZetaMessage calldata zetaMessage
     ) external override isValidMessageCall(zetaMessage) {
-        (bytes32 messageType, address from) = abi.decode(
+        (address to, uint256 value) = abi.decode(
             zetaMessage.message,
-            (bytes32, address)
+            (address, uint256)
         );
 
-        if (messageType != COUNTER_MESSAGE_TYPE) revert InvalidMessageType();
+        _mint(to, value);
 
-        counter[from]++;
-        emit CounterEvent(from);
+        emit CrossChainERC20Event(to, value);
     }
 
     function onZetaRevert(
         ZetaInterfaces.ZetaRevert calldata zetaRevert
     ) external override isValidRevertCall(zetaRevert) {
-        (bytes32 messageType, address from) = abi.decode(
+        (address to, uint256 value, address from) = abi.decode(
             zetaRevert.message,
-            (bytes32, address)
+            (address, uint256, address)
         );
 
-        if (messageType != COUNTER_MESSAGE_TYPE) revert InvalidMessageType();
+        _mint(from, value);
 
-        if (counter[from] <= 0) revert DecrementOverflow();
-        counter[from]--;
-        emit CounterRevertedEvent(from);
+        emit CrossChainERC20RevertedEvent(to, value);
     }
 }

messaging/warriors/package.json → messaging/erc20/package.json

@@ -26,7 +26,7 @@
     "@types/node": ">=12.0.0",
     "@typescript-eslint/eslint-plugin": "^5.59.9",
     "@typescript-eslint/parser": "^5.59.9",
-    "@zetachain/toolkit": "6.0.0",
+    "@zetachain/toolkit": "7.0.0",
     "axios": "^1.3.6",
     "chai": "^4.2.0",
     "dotenv": "^16.0.3",