08_Vault

src/08_Vault.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+
+/*
+Author: @BoscoHuang
+
+Process:
+- Deploy Token contract in anvil: 
+    0. anvil
+    1. forge create src/08_Vault.sol:Vault  --rpc-url http://127.0.0.1:8545 --private-key 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80 --constructor-args 0x412076657279207374726f6e67207365637265742070617373776f7264203a29
+*/
+
+
+contract Vault {
+    bool public locked;
+    bytes32 private password;
+
+    constructor(bytes32 _password) {
+        locked = true;
+        password = _password;
+    }
+
+    function unlock(bytes32 _password) public {
+        if (password == _password) {
+            locked = false;
+        }
+    }
+}

test/08_Vault.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "ds-test/test.sol";
+import "forge-std/Test.sol";
+import "../src/08_Vault.sol";
+
+/*
+Author: @BoscoHuang
+
+
+Command:
+- get the password: cast storage 0x5FbDB2315678afecb367f032d93F642f64180aa3 1 --rpc-url http://127.0.0.1:8545
+- forge test --match-contract VaultTest --fork-url http://127.0.0.1:8545 -vvv
+*/
+
+contract VaultTest is DSTest {
+    Vault Ethernaut08;
+
+    function setUp() public {
+        Ethernaut08 = Vault(0x5FbDB2315678afecb367f032d93F642f64180aa3);
+    }
+
+    function testEthernaut08() public {
+        bytes32 password = 0x412076657279207374726f6e67207365637265742070617373776f7264203a29;
+
+        Ethernaut08.unlock(password);
+        assert(Ethernaut08.locked() == false);
+        console.log("Unlocked Vault");
+    }
+
+}