Fix vulnerable contract

vulnerable_contracts/unchecked_chainlink_oracle_price/README.md

@@ -0,0 +1,25 @@
+# Unchecked Chainlink Oracle Price
+An intentionally vulnerable Foundry project.
+
+```bash
+tree
+.
+├── foundry.toml                            # Contract's root
+├── src/                                    
+│   └── unchecked_chainlink_oracle_price.sol        # Vulnerable contract
+```
+## Usage
+
+### Build
+
+Download chainlink dependencies to build.
+
+```bash
+forge build
+```
+
+### Test
+
+```bash
+forge test
+```

vulnerable_contracts/unchecked_chainlink_oracle_price/foundry.toml

@@ -0,0 +1,4 @@
+[profile.default]
+src = "src"
+out = "out"
+libs = ["lib"]

vulnerable_contracts/unchecked_chainlink_oracle_price/src/unchecked_chainlink_oracle_price.sol

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+// Import the Chainlink AggregatorV3Interface
+import "chainlink-brownie-contracts/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
+
+contract LatestBadContract {
+    AggregatorV3Interface internal priceFeed;
+    int256 public minAnswer;
+
+    /**
+     * Constructor takes the address of a Chainlink Data Feed contract.
+     */
+    constructor(address _priceFeed, int256 _minAnswer) {
+        priceFeed = AggregatorV3Interface(_priceFeed);
+        minAnswer = _minAnswer; // Set the minimum acceptable answer
+    }
+
+    /**
+     * Returns the latest round data from the Chainlink Data Feed.
+     */
+    function getLatestRoundData()
+        public
+        view
+        returns (
+            uint80 roundId,
+            int256 answer,
+            uint256 startedAt,
+            uint256 updatedAt,
+            uint80 answeredInRound
+        )
+    {
+        (
+            uint80 id,
+            int256 price,
+            uint256 started,
+            uint256 updated,
+            uint80 answeredRound
+        ) = priceFeed.latestRoundData();
+
+        // No check here! fix suggestion examples:
+        // require(price >= minAnswer, "Price below minimum accepted value");
+        // or
+        // if (price < minAnswer) {
+        //     revert("Error: Price below minimum expected value");
+        // }
+
+        return (id, price, started, updated, answeredRound);
+    }
+}