Hardhat and Solidity Steps

stepxx_web3/step04_hardhat/step00-setup/.gitignore

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

stepxx_web3/step04_hardhat/step00-setup/README.md

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+1 - Install Node js. If your version of Node.js is older and not supported by Hardhat follow the instructions below to upgrade.
+2 - Creating a new Hardhat project:
+
+```
+mkdir hardhat-tutorial
+cd hardhat-tutorial
+npm init
+npm install --save-dev hardhat
+npx hardhat
+```
+
+select typescript project
+
+Tasks
+Every time you're running Hardhat from the command-line, you're running a task. For example, npx hardhat compile is running the compile task. To see the currently available tasks in your project, run npx hardhat. Feel free to explore any task by running npx hardhat help [task].
+
+```
+npm install --save-dev @nomicfoundation/hardhat-toolbox
+```
+
+3 - Compile project:
+
+```
+npx hardhat compile
+```
+
+It will convert your contract into byte code and Create ABI.
+
+4 - Test your contract:
+
+```
+npx hardhat test
+```
+
+5 - Deploy your project:
+
+```
+npx hardhat run scripts/deploy.ts
+```
+
+--network localhost: (it is used to deploy)
+gives all information about the node, contract deployment, address, eth, from, gas used, and block no

stepxx_web3/step04_hardhat/step00-setup/contracts/Lock.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.9;
+
+// Uncomment this line to use console.log
+// import "hardhat/console.sol";
+
+contract Lock {
+    uint public unlockTime;
+    address payable public owner;
+
+    event Withdrawal(uint amount, uint when);
+
+    constructor(uint _unlockTime) payable {
+        require(
+            block.timestamp < _unlockTime,
+            "Unlock time should be in the future"
+        );
+
+        unlockTime = _unlockTime;
+        owner = payable(msg.sender);
+    }
+
+    function withdraw() public {
+        // Uncomment this line, and the import of "hardhat/console.sol", to print a log in your terminal
+        // console.log("Unlock time is %o and block timestamp is %o", unlockTime, block.timestamp);
+
+        require(block.timestamp >= unlockTime, "You can't withdraw yet");
+        require(msg.sender == owner, "You aren't the owner");
+
+        emit Withdrawal(address(this).balance, block.timestamp);
+
+        owner.transfer(address(this).balance);
+    }
+}

stepxx_web3/step04_hardhat/step00-setup/hardhat.config.ts

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+import { HardhatUserConfig } from "hardhat/config";
+import "@nomicfoundation/hardhat-toolbox";
+
+const config: HardhatUserConfig = {
+  solidity: "0.8.9",
+};
+
+export default config;