From 1c9778a8ea3885f36a3d86a9cf84d42737707f86 Mon Sep 17 00:00:00 2001
From: James Bachini <james@mcambridge.com>
Date: Wed, 28 Jun 2023 15:55:08 +0100
Subject: [PATCH] Create LayerZeroOFT.sol

---
 contracts/LayerZeroOFT.sol | 47 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 contracts/LayerZeroOFT.sol

diff --git a/contracts/LayerZeroOFT.sol b/contracts/LayerZeroOFT.sol
new file mode 100644
index 0000000..c3289a5
--- /dev/null
+++ b/contracts/LayerZeroOFT.sol
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+/*
+    // https://layerzero.gitbook.io/docs/technical-reference/testnet/testnet-addresses
+    Goerli          lzEndpointAddress = 0xbfD2135BFfbb0B5378b56643c2Df8a87552Bfa23
+    chainId: 10121  deploymentAddress = 
+    Optimism-Goerli lzEndpointAddress = 0xae92d5aD7583AD66E49A0c67BAd18F6ba52dDDc1
+    chainId: 10132  deploymentAddress = 
+*/
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import "https://github.com/LayerZero-Labs/solidity-examples/blob/main/contracts/token/oft/OFTCore.sol";
+import "https://github.com/LayerZero-Labs/solidity-examples/blob/main/contracts/token/oft/IOFT.sol";
+
+contract LayerZeroOFT is OFTCore, ERC20, IOFT {
+    address constant lzEndpointAddress = 0xbfD2135BFfbb0B5378b56643c2Df8a87552Bfa23;
+
+    constructor() ERC20("LayerZeroOFT", "LZOFT") OFTCore(lzEndpointAddress) {
+        if (block.chainid == 5) { // Only mint initial supply on Goerli
+            _mint(msg.sender, 1_000_000 * 10 ** decimals());
+        }
+    }
+
+    function supportsInterface(bytes4 interfaceId) public view virtual override(OFTCore, IERC165) returns (bool) {
+        return interfaceId == type(IOFT).interfaceId || interfaceId == type(IERC20).interfaceId || super.supportsInterface(interfaceId);
+    }
+
+    function token() public view virtual override returns (address) {
+        return address(this);
+    }
+
+    function circulatingSupply() public view virtual override returns (uint) {
+        return totalSupply();
+    }
+
+    function _debitFrom(address _from, uint16, bytes memory, uint _amount) internal virtual override returns(uint) {
+        address spender = _msgSender();
+        if (_from != spender) _spendAllowance(_from, spender, _amount);
+        _burn(_from, _amount);
+        return _amount;
+    }
+
+    function _creditTo(uint16, address _toAddress, uint _amount) internal virtual override returns(uint) {
+        _mint(_toAddress, _amount);
+        return _amount;
+    }
+}
\ No newline at end of file