feat: fill up challenge

packages/hardhat/contracts/CrowdFund.sol

@@ -10,18 +10,27 @@ contract CrowdFund {
     /////////////////
 
     // Errors go here...
+    error NotOpenToWithdraw();
+    error WithdrawTransferFailed(address to, uint256 amount);
+    error TooEarly(uint256 deadline, uint256 currentTimestamp);
+    error AlreadyCompleted();
 
     //////////////////////
     /// State Variables //
     //////////////////////
 
     FundingRecipient public fundingRecipient;
+    mapping(address => uint256) public balances;
+    bool public openToWithdraw;
+    uint256 public deadline = block.timestamp + 2 hours;
+    uint256 public constant threshold = 1 ether;
 
     ////////////////
     /// Events /////
     ////////////////
 
     // Events go here...
+    event Contribution(address, uint256);
 
     ///////////////////
     /// Modifiers /////
@@ -29,6 +38,7 @@ contract CrowdFund {
 
     modifier notCompleted() {
         _;
+	if (block.timestamp >= deadline) revert AlreadyCompleted();
     }
 
     ///////////////////
@@ -43,19 +53,42 @@ contract CrowdFund {
     /// Functions /////
     ///////////////////
 
-    function contribute() public payable {}
+    function contribute() public payable {
+      balances[msg.sender] += msg.value;
+      emit Contribution(msg.sender, msg.value);
+    }
 
-    function withdraw() public {}
+    function withdraw() public {
+      if (!openToWithdraw) revert NotOpenToWithdraw();
 
-    function execute() public {}
+      uint256 amount = balances[msg.sender];
+      balances[msg.sender] = 0;
 
-    receive() external payable {}
+      (bool success,) = msg.sender.call{value: amount}("");
+      if (!success) revert WithdrawTransferFailed(msg.sender, amount);
+    }
+
+    function execute() public {
+      if (block.timestamp < deadline) revert TooEarly(deadline, block.timestamp);
+
+      uint256 balance = address(this).balance;
+      if (balance >= threshold) {
+        fundingRecipient.complete{value: balance}();
+      } else {
+        openToWithdraw = true;
+      }
+    }
+
+    receive() external payable {
+      contribute();
+    }
 
     ////////////////////////
     /// View Functions /////
     ////////////////////////
 
     function timeLeft() public view returns (uint256) {
-        return 0;
+	if (block.timestamp >= deadline) return 0;
+        return deadline - block.timestamp;
     }
 }

packages/hardhat/deployments/sepolia/.chainId

@@ -0,0 +1 @@
+11155111

packages/hardhat/deployments/sepolia/FundingRecipient.json

@@ -0,0 +1,76 @@
+{
+  "address": "0xeA89D4E3dA2eb001631dD1c0CFa0D922869D1836",
+  "abi": [
+    {
+      "inputs": [],
+      "name": "complete",
+      "outputs": [],
+      "stateMutability": "payable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "completed",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+  ],
+  "transactionHash": "0x7ad9d25092aed9d8f2ee38614dee5e9b457442ad32bf820384c0bc9aaf36c54c",
+  "receipt": {
+    "to": null,
+    "from": "0x2C24aE4fDc0d94FF458F9a12A4c2fF5E5E0a6ca6",
+    "contractAddress": "0xeA89D4E3dA2eb001631dD1c0CFa0D922869D1836",
+    "transactionIndex": 106,
+    "gasUsed": "87989",
+    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+    "blockHash": "0xe9fa6a5e45cd6851195ebf9ba728928f4e5d2982f2d8606c64450ea2ae23b4b5",
+    "transactionHash": "0x7ad9d25092aed9d8f2ee38614dee5e9b457442ad32bf820384c0bc9aaf36c54c",
+    "logs": [],
+    "blockNumber": 10021914,
+    "cumulativeGasUsed": "20601449",
+    "status": 1,
+    "byzantium": true
+  },
+  "args": [],
+  "numDeployments": 1,
+  "solcInputHash": "458d1396e5cbe5b8f0626cefc89ad3a7",
+  "metadata": "{\"compiler\":{\"version\":\"0.8.20+commit.a1b79de6\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"name\":\"complete\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"completed\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/FundingRecipient.sol\":\"FundingRecipient\"},\"evmVersion\":\"paris\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"contracts/FundingRecipient.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\npragma solidity 0.8.20; // Do not change the solidity version as it negatively impacts submission grading\\n\\ncontract FundingRecipient {\\n    bool public completed;\\n\\n    function complete() public payable {\\n        completed = true;\\n    }\\n}\\n\",\"keccak256\":\"0x093e9f4390e6f225b75cb2775607526dbf062751fca91949ee80de147707f219\",\"license\":\"MIT\"}},\"version\":1}",
+  "bytecode": "0x6080604052348015600f57600080fd5b5060a08061001e6000396000f3fe60806040526004361060265760003560e01c8063522e117714602b5780639d9a7fe914603e575b600080fd5b603c6000805460ff19166001179055565b005b348015604957600080fd5b5060005460569060ff1681565b604051901515815260200160405180910390f3fea2646970667358221220db8e4d450c3ce702917ec87bbf961a466fe7b3581202297048bd7b39e9b649e064736f6c63430008140033",
+  "deployedBytecode": "0x60806040526004361060265760003560e01c8063522e117714602b5780639d9a7fe914603e575b600080fd5b603c6000805460ff19166001179055565b005b348015604957600080fd5b5060005460569060ff1681565b604051901515815260200160405180910390f3fea2646970667358221220db8e4d450c3ce702917ec87bbf961a466fe7b3581202297048bd7b39e9b649e064736f6c63430008140033",
+  "devdoc": {
+    "kind": "dev",
+    "methods": {},
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  },
+  "storageLayout": {
+    "storage": [
+      {
+        "astId": 56,
+        "contract": "contracts/FundingRecipient.sol:FundingRecipient",
+        "label": "completed",
+        "offset": 0,
+        "slot": "0",
+        "type": "t_bool"
+      }
+    ],
+    "types": {
+      "t_bool": {
+        "encoding": "inplace",
+        "label": "bool",
+        "numberOfBytes": "1"
+      }
+    }
+  }
+}

packages/hardhat/hardhat.config.ts

@@ -37,7 +37,7 @@ const config: HardhatUserConfig = {
       },
     ],
   },
-  defaultNetwork: "localhost",
+  defaultNetwork: "sepolia", //"localhost",
   namedAccounts: {
     deployer: {
       // By default, it will take the first Hardhat account as the deployer