w2-2

w2-2/Score/.gitignore

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+node_modules
+.env
+coverage
+coverage.json
+typechain
+typechain-types
+
+# Hardhat files
+cache
+artifacts
+

w2-2/Score/README.md

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+# Sample Hardhat Project
+
+This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a script that deploys that contract.
+
+Try running some of the following tasks:
+
+```shell
+npx hardhat help
+npx hardhat test
+REPORT_GAS=true npx hardhat test
+npx hardhat node
+npx hardhat run scripts/deploy.js
+```

w2-2/Score/contracts/Score.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.9;
+
+interface IScore {
+    event SetScore(address indexed student, uint256 score);
+
+    function setScore(address student, uint256 score) external;
+    function getScore(address student) external view returns(uint256 score);
+
+}
+
+contract Score is IScore {
+    address public teacher;
+    address public owner;
+    mapping(address => uint256) private scores;
+
+    error NotOwner();
+    error NotTeacher();
+    error InvalidScore();
+    error ZeroAddress();
+
+    constructor(address teacher_) {
+        owner = msg.sender;
+        teacher = teacher_;
+    }
+
+    modifier onlyTeacher() {
+        if(msg.sender != teacher) revert NotTeacher();
+        _;
+    }
+
+    modifier onlyOwner() {
+        if(msg.sender != owner) revert NotOwner();
+        _;
+    }
+
+    function setScore(address student, uint256 score) onlyTeacher external override {
+        if(msg.sender == address(0)) revert ZeroAddress();
+        if(score > 100) revert InvalidScore();
+        scores[student] = score;
+        emit SetScore(student,score);
+    }
+
+    function getScore(address student) external view override returns (uint256){
+        return scores[student];
+    }
+
+    function setTeacher(address teacher_) onlyOwner external {
+        teacher = teacher_;
+    }
+
+    function getTeacher() external view returns(address) {
+        return teacher;
+    }
+}

w2-2/Score/contracts/Teacher.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.9;
+import "./Score.sol";
+
+contract Teacher{
+
+    function callSetScore(IScore scoreContract, address student, uint256 score) external {
+        scoreContract.setScore(student, score);
+    }
+
+
+}

w2-2/Score/hardhat.config.js

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+require("@nomicfoundation/hardhat-toolbox");
+require("@nomiclabs/hardhat-etherscan");
+const dotenv = require("dotenv");
+
+dotenv.config();
+
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  solidity: "0.8.18",
+  networks: {
+    hardhat: {},
+    goerli: {
+      url: process.env.GOERLI_RPC_URL,
+      accounts: [process.env.PRIVATE_KEY]
+    }
+  },
+  etherscan: {
+    apiKey: process.env.ETHERSCAN_KEY
+  },
+
+};