add hardhat

.github/workflows/build-hardhat-project.yaml

@@ -0,0 +1,41 @@
+name: Hardhat Deploy and Test
+
+on: [workflow_dispatch]
+
+jobs:
+  deploy_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.9.0
+      - name: Set up Docker Compose
+        uses: docker/compose-cli@v1
+        with: 
+            version: '3.0'
+    
+      - name: Run geth devnet
+        run: docker compose up -d
+
+      - name: Install dependencies
+        run: | 
+            cd hardhat
+            npm install -y
+            npm install --save-dev hardhat -y
+            npx hardhat init -y
+            npm install --save-dev @nomicfoundation/hardhat-toolbox -y            
+    
+
+      - name: Deploy Hardhat project
+        run: |
+            cd hardhat
+            npx hardhat run scripts/deploy.js --network localhost
+
+      - name: Run tests
+        run: npx hardhat test --network localhost
+    

.gitignore

@@ -50,3 +50,11 @@ profile.cov
 logs/
 
 tests/spec-tests/
+
+# Hardhat
+node_modules
+.env
+coverage
+typechain
+cache
+artifacts

create_image.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Set the name of the container you want to create an image from
+container_name="limechain-task-geth-1"
+
+# Get the container ID by filtering the output of `docker ps`
+container_id=$(docker ps -qf "name=$container_name")
+
+# Check if the container ID is not empty
+if [ -n "$container_id" ]; then
+  echo "Found container ID: $container_id"
+
+  # Generate a unique tag for the new image
+  image_tag="anglyuboslav/geth-smart-con"
+
+  # Create an image from the container
+  docker commit "$container_id" "$image_tag"
+
+  echo "Image created with tag: $image_tag"
+else
+  echo "No running container found with name: $container_name"
+fi

docker-compose.yml

@@ -1,6 +1,8 @@
 version: "3.9"
 services:
   geth:
-    image: anglyuboslav/go-eth-lab
-    command: 
-      - --dev
+    image: anglyuboslav/geth
+    command: --dev --http --http.addr 0.0.0.0
+    ports:
+      - 8545:8545
+      - 30303:30303

hardhat/contracts/Token.sol

@@ -0,0 +1,66 @@
+//SPDX-License-Identifier: UNLICENSED
+
+// Solidity files have to start with this pragma.
+// It will be used by the Solidity compiler to validate its version.
+pragma solidity ^0.8.0;
+
+
+// This is the main building block for smart contracts.
+contract Token {
+    // Some string type variables to identify the token.
+    string public name = "My Hardhat Token";
+    string public symbol = "MHT";
+
+    // The fixed amount of tokens, stored in an unsigned integer type variable.
+    uint256 public totalSupply = 1000000;
+
+    // An address type variable is used to store ethereum accounts.
+    address public owner;
+
+    // A mapping is a key/value map. Here we store each account's balance.
+    mapping(address => uint256) balances;
+
+    // The Transfer event helps off-chain applications understand
+    // what happens within your contract.
+    event Transfer(address indexed _from, address indexed _to, uint256 _value);
+
+    /**
+     * Contract initialization.
+     */
+    constructor() {
+        // The totalSupply is assigned to the transaction sender, which is the
+        // account that is deploying the contract.
+        balances[msg.sender] = totalSupply;
+        owner = msg.sender;
+    }
+
+    /**
+     * A function to transfer tokens.
+     *
+     * The `external` modifier makes a function *only* callable from *outside*
+     * the contract.
+     */
+    function transfer(address to, uint256 amount) external {
+        // Check if the transaction sender has enough tokens.
+        // If `require`'s first argument evaluates to `false` then the
+        // transaction will revert.
+        require(balances[msg.sender] >= amount, "Not enough tokens");
+
+        // Transfer the amount.
+        balances[msg.sender] -= amount;
+        balances[to] += amount;
+
+        // Notify off-chain applications of the transfer.
+        emit Transfer(msg.sender, to, amount);
+    }
+
+    /**
+     * Read only function to retrieve the token balance of a given account.
+     *
+     * The `view` modifier indicates that it doesn't modify the contract's
+     * state, which allows us to call it without executing a transaction.
+     */
+    function balanceOf(address account) external view returns (uint256) {
+        return balances[account];
+    }
+}

hardhat/hardhat.config.js

@@ -0,0 +1,5 @@
+require("@nomicfoundation/hardhat-toolbox");
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  solidity: "0.8.19",
+};

hardhat/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "hardhat",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@nomicfoundation/hardhat-toolbox": "^4.0.0",
+    "hardhat": "^2.19.1"
+  }
+}

hardhat/scripts/deploy.js

@@ -0,0 +1,16 @@
+async function main() {
+    const [deployer] = await ethers.getSigners();
+  
+    console.log("Deploying contracts with the account:", deployer.address);
+  
+    const token = await ethers.deployContract("Token");
+  
+    console.log("Token address:", await token.getAddress());
+  }
+  
+  main()
+    .then(() => process.exit(0))
+    .catch((error) => {
+      console.error(error);
+      process.exit(1);
+    });

hardhat/test/Token.js

@@ -0,0 +1,12 @@
+const { expect } = require("chai");
+
+describe("Token contract", function () {
+  it("Deployment should assign the total supply of tokens to the owner", async function () {
+    const [owner] = await ethers.getSigners();
+
+    const hardhatToken = await ethers.deployContract("Token");
+
+    const ownerBalance = await hardhatToken.balanceOf(owner.address);
+    expect(await hardhatToken.totalSupply()).to.equal(ownerBalance);
+  });
+});