Submission/crowdfunding/savagechucks

assignments/savage_assignment/Solidity_Assignment/crowdfunding/.gitignore

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+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage

assignments/savage_assignment/Solidity_Assignment/crowdfunding/README.md

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+# Sample Hardhat 3 Beta Project (`mocha` and `ethers`)
+
+This project showcases a Hardhat 3 Beta project using `mocha` for tests and the `ethers` library for Ethereum interactions.
+
+To learn more about the Hardhat 3 Beta, please visit the [Getting Started guide](https://hardhat.org/docs/getting-started#getting-started-with-hardhat-3). To share your feedback, join our [Hardhat 3 Beta](https://hardhat.org/hardhat3-beta-telegram-group) Telegram group or [open an issue](https://github.com/NomicFoundation/hardhat/issues/new) in our GitHub issue tracker.
+
+## Project Overview
+
+This example project includes:
+
+- A simple Hardhat configuration file.
+- Foundry-compatible Solidity unit tests.
+- TypeScript integration tests using `mocha` and ethers.js
+- Examples demonstrating how to connect to different types of networks, including locally simulating OP mainnet.
+
+## Usage
+
+### Running Tests
+
+To run all the tests in the project, execute the following command:
+
+```shell
+npx hardhat test
+```
+
+You can also selectively run the Solidity or `mocha` tests:
+
+```shell
+npx hardhat test solidity
+npx hardhat test mocha
+```
+
+### Make a deployment to Sepolia
+
+This project includes an example Ignition module to deploy the contract. You can deploy this module to a locally simulated chain or to Sepolia.
+
+To run the deployment to a local chain:
+
+```shell
+npx hardhat ignition deploy ignition/modules/Counter.ts
+```
+
+To run the deployment to Sepolia, you need an account with funds to send the transaction. The provided Hardhat configuration includes a Configuration Variable called `SEPOLIA_PRIVATE_KEY`, which you can use to set the private key of the account you want to use.
+
+You can set the `SEPOLIA_PRIVATE_KEY` variable using the `hardhat-keystore` plugin or by setting it as an environment variable.
+
+To set the `SEPOLIA_PRIVATE_KEY` config variable using `hardhat-keystore`:
+
+```shell
+npx hardhat keystore set SEPOLIA_PRIVATE_KEY
+```
+
+After setting the variable, you can run the deployment with the Sepolia network:
+
+```shell
+npx hardhat ignition deploy --network sepolia ignition/modules/Counter.ts
+```

assignments/savage_assignment/Solidity_Assignment/crowdfunding/contracts/Counter.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+contract Counter {
+  uint public x;
+
+  event Increment(uint by);
+
+  function inc() public {
+    x++;
+    emit Increment(1);
+  }
+
+  function incBy(uint by) public {
+    require(by > 0, "incBy: increment should be positive");
+    x += by;
+    emit Increment(by);
+  }
+}

assignments/savage_assignment/Solidity_Assignment/crowdfunding/contracts/Counter.t.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Counter} from "./Counter.sol";
+import {Test} from "forge-std/Test.sol";
+
+// Solidity tests are compatible with foundry, so they
+// use the same syntax and offer the same functionality.
+
+contract CounterTest is Test {
+  Counter counter;
+
+  function setUp() public {
+    counter = new Counter();
+  }
+
+  function test_InitialValue() public view {
+    require(counter.x() == 0, "Initial value should be 0");
+  }
+
+  function testFuzz_Inc(uint8 x) public {
+    for (uint8 i = 0; i < x; i++) {
+      counter.inc();
+    }
+    require(counter.x() == x, "Value after calling inc x times should be x");
+  }
+
+  function test_IncByZero() public {
+    vm.expectRevert();
+    counter.incBy(0);
+  }
+}

assignments/savage_assignment/Solidity_Assignment/crowdfunding/contracts/contribute.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.28;
+
+
+contract CrowdFunding{
+
+    struct Adashey{
+        address owner;
+        uint deadline;
+        uint targetAmount;
+        uint totalCollected;
+    }
+
+    // create a counter to give each pool a uinque ID
+    uint public poolCounter;
+
+
+    // mapping the counter to the struct which contains the details of the pool
+    mapping(uint => Adashey) public fundingStorage;
+
+
+    // map pool ID to (contributor address to amount)
+    mapping(uint => mapping(address => uint)) public contributorsFunds;
+
+    function createPool(uint _deadline, uint _targetAmount) external returns(uint) {
+        require(_targetAmount > 0, "Must be greater than zero");
+        poolCounter++;
+        fundingStorage[poolCounter] = Adashey({
+            owner: msg.sender,
+            deadline: _deadline,
+            targetAmount: _targetAmount,
+            totalCollected: 0
+        });
+
+        return poolCounter;
+    }
+
+
+    function contribute(uint _id) external payable {
+        require(fundingStorage[_id].owner != address(0), "Pool does not exist");
+        require(block.timestamp < fundingStorage[_id].deadline, "Deadline passed");
+        require( msg.value > 0, "Must send eth");
+
+        // this line stores the amount each of the contributor contributed to the project in the mapping
+        contributorsFunds[_id][msg.sender] += msg.value;
+        // ths line refreshs the state of this transaction when a contributor contributes
+        fundingStorage[_id].totalCollected += msg.value;
+    }
+
+    function withdrawFunds(uint _id) external{
+        require(msg.sender == fundingStorage[_id].owner, "Only owner can withdraw");
+        require(fundingStorage[_id].totalCollected >= fundingStorage[_id].targetAmount, "Target amount hasn't reached");
+        require(block.timestamp >= fundingStorage[_id].deadline, "Deadline hasn't reached");
+        require(fundingStorage[_id].totalCollected > 0, "Already Withdrawn");
+
+        // Saves the total amount of contribution to this variable before reseting the state of the transaction
+        uint amount = fundingStorage[_id].totalCollected;
+
+        // prevent double withdraw 
+        fundingStorage[_id].totalCollected = 0;  
+
+        (bool success,) = msg.sender.call{value: amount}("");
+        require(success, "Transafer failed");
+    }
+
+
+
+    // this function refunds the money of the contributors back if they want a refund and if the target the project placed didn't complete and the deadline has passed
+    function refundFunds(uint _id) external {
+        require(block.timestamp <= fundingStorage[_id].deadline, "Deadline has reached");
+        require(contributorsFunds[_id][msg.sender] > 0, "You didn't contribute or already refunded");
+        require(fundingStorage[_id].totalCollected < fundingStorage[_id].targetAmount, "Target amount has reached");
+
+
+        // assigning the amount the contributor contributed to this varaible for easy access when attempting too refund. 
+        uint amount = contributorsFunds[_id][msg.sender];
+
+        // setting the state to zero to avoid double request for refund after refund
+        contributorsFunds[_id][msg.sender] = 0;
+
+        (bool success,) = msg.sender.call{value: amount}("");
+        require(success, "Transafer failed");
+
+    }
+
+
+
+
+
+}
+
+

assignments/savage_assignment/Solidity_Assignment/crowdfunding/hardhat.config.ts

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+import "dotenv/config";
+import hardhatToolboxMochaEthersPlugin from "@nomicfoundation/hardhat-toolbox-mocha-ethers";
+import { configVariable, defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  plugins: [hardhatToolboxMochaEthersPlugin],
+  solidity: {
+    profiles: {
+      default: {
+        version: "0.8.28",
+      },
+      production: {
+        version: "0.8.28",
+        settings: {
+          optimizer: {
+            enabled: true,
+            runs: 200,
+          },
+        },
+      },
+    },
+  },
+  networks: {
+    hardhatMainnet: {
+      type: "edr-simulated",
+      chainType: "l1",
+    },
+    hardhatOp: {
+      type: "edr-simulated",
+      chainType: "op",
+    },
+    sepolia: {
+      type: "http",
+      chainType: "l1",
+      url: configVariable("SEPOLIA_RPC_URL"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
+    },
+  },
+  verify: {
+    etherscan: {
+      apiKey: configVariable("ETHERSCAN_API_KEY"),
+    },
+  },
+});