adding hardhat toolbox and few improvements

.env.example

@@ -3,4 +3,5 @@ PRIV_KEY=
 ETHEREUM_MAINNET_RPC_URL=
 GOERLI_RPC_URL=
 POLYGON_MUMBAI_RPC_URL=
-POLYGON_MAINNET_RPC_URL=
+POLYGON_MAINNET_RPC_URL=
+ETHERSCAN_API_KEY=

.github/workflows/ci.yml

@@ -14,6 +14,7 @@ jobs:
   e2e-test:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         node-version: [14.x, 16.x, 18.x]
@@ -26,16 +27,19 @@ jobs:
         # uses: borales/[email protected]
         with:
           node-version: ${{ matrix.node-version }}
-          cache: yarn
-      - name: "Install packages"
-        run: yarn
-      - name: "Rename .env.example to .env"
-        run: mv .env.example .env
+      - name: "Install packages with latest npm"
+        run: npm i -g npm@latest && npm install
+      - name: "Copy .env.example to .env"
+        run: cp .env.example .env
       - name: "Start hardhat node"
-        run: yarn hardhat node & sleep 3
+        run: npx hardhat node & sleep 3
+      - name: "Check for solidity linter errors"
+        run: npx hardhat check
       - name: "Compile contracts"
-        run: yarn compile
+        run: npm run compile
+      - name: "Check solidity coverage"
+        run: npm run coverage
       - name: "Run tests"
-        run: yarn test
+        run: npm run test
       - name: "Deploy contracts"
-        run: yarn deploy
+        run: npm run deploy

.gitignore

@@ -8,20 +8,21 @@ bin-release/
 .settings/
 node_modules/
 package-lock.json
+yarn.lock
 
 # Executables
 *.swf
 *.air
 *.ipa
 *.apk
+*.env
 
 # Project files, i.e. `.project`, `.actionScriptProperties` and `.flexProperties`
 # should NOT be excluded as they contain compiler settings and other important
 # information for Eclipse / Flash Builder.
 
-node_modules
-.env
-
 #Hardhat files
 cache
-artifacts
+artifacts/
+coverage/
+coverage.json

README.md

@@ -2,28 +2,48 @@
 
 This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, a sample script that deploys that contract, and an example of a task implementation, which simply lists the available accounts with balances.
 
+> Recommended to use Node.js v14+ and npm v7+.
+
 > Rename `env.example` to `.env` and add your env specific keys.
 
 Try running some of the following tasks:
 
 ```shell
-yarn install
+npm install
+
+# starts local node
+npx hardhat node
+
+# list accounts with balances
+npx hardhat accounts
+
+# show balance eth of specified account
+npx hardhat balance --account '0x47a9...'
 
-yarn hardhat node # starts local node
+# compile contracts
+npx hardhat compile
 
-yarn hardhat accounts # list accounts with balances
+# deploy contract defined in tasks on specified network
+npx hardhat deploy --network local
 
-yarn hardhat balance --account '0x47a9...' # show balance eth of specified account
+# deploy contract in scripts/deploy.js on specified network
+npx hardhat run scripts/deploy.js --network local
 
-yarn hardhat compile # compiles contracts
+#check linter issues using solhint plugin
+npx hardhat check
 
-yarn hardhat deploy --network local # deploys contract defined in tasks on specified network
+# check coverage using solidity-coverage plugin: supports hardhat network only
+npx hardhat coverage --network hardhat
 
-yarn hardhat run --network local scripts/deploy.js # deploys contract in scripts/deploy.js
+# unit tests including gas usage
+npx hardhat test
 
-yarn hardhat test # runs tests
+# remove all compiled and deployed artifacts
+npx hardhat clean
 
-yarn hardhat clean # removes all compiled and deployed artifacts
+# verify contract
+npx hardhat verify --network <deployed network> <deployed contract address> "<constructor1>" "<constructor2>"
 
-yarn hardhat help # shows help
+# show help
+npx hardhat help
 ```

hardhat.config.js

@@ -1,4 +1,6 @@
-require("@nomiclabs/hardhat-ethers");
+require('@nomicfoundation/hardhat-toolbox');
+require('@nomicfoundation/hardhat-chai-matchers');
+require("@nomiclabs/hardhat-solhint");
 require('dotenv').config();
 
 // defining accounts to reuse.
@@ -51,7 +53,7 @@ module.exports = {
       url: process.env.GOERLI_RPC_URL,
       accounts // private keys
     },
-    polygonTest: {
+    polygonMumbai: {
       url: process.env.POLYGON_MUMBAI_RPC_URL,
       accounts
     },
@@ -60,6 +62,14 @@ module.exports = {
       accounts
     }
   },
+  etherscan: {
+    // API key for Polygonscan
+    apiKey: process.env.ETHERSCAN_API_KEY
+  },
+  gasReporter: {
+    enabled: true,
+    currency: "USD",
+  },
   solidity: {
     version: "0.8.16",
     settings: {

package.json

@@ -4,18 +4,19 @@
   "description": "hardhat and ethersjs boilerplate for Dapp development",
   "main": "index.js",
   "scripts": {
-    "test": "yarn hardhat test",
-    "compile": "yarn hardhat compile",
-    "deploy": "yarn hardhat deploy"
+    "test": "npx hardhat test",
+    "compile": "npx hardhat compile",
+    "deploy": "npx hardhat deploy",
+    "coverage": "npx hardhat coverage --network hardhat"
   },
   "keywords": [],
   "author": "Salman Dabbakuti",
   "license": "ISC",
   "devDependencies": {
-    "@nomiclabs/hardhat-ethers": "^2.1.1",
-    "chai": "^4.3.6",
+    "@nomicfoundation/hardhat-chai-matchers": "^1.0.4",
+    "@nomicfoundation/hardhat-toolbox": "^2.0.0",
+    "@nomiclabs/hardhat-solhint": "^2.0.0",
     "dotenv": "^16.0.3",
-    "ethers": "^5.7.0",
     "hardhat": "^2.10.2"
   }
-}
+}

scripts/deploy.js

@@ -1,3 +1,8 @@
+/*
+* This script can only be run through Hardhat, and not through node directly.
+* Since ethers or any other hardhat plugins are globally available to Hardhat Runtime Environment. So we are not importing them explicitly.
+* So when running this script through node, we will get an error saying that ethers or any other plugins not defined error.
+*/
 
 async function main() {
   const contractFactory = await ethers.getContractFactory("Greeter");

test/sample-test.js

@@ -1,16 +1,31 @@
+/*
+* This script can only be run through Hardhat, and not through node directly.
+* Since ethers or any other hardhat plugins are globally available to Hardhat Runtime Environment. So we are not importing them explicitly.
+* So when running this script through node, we will get an error saying that ethers or any other plugins not defined error.
+*/
+
 const { expect } = require("chai");
-const { ethers } = require("hardhat");
 
 describe("Contract Tests", function () {
-  it("Should return the new greeting once it's changed", async function () {
+  let accounts;
+  let greeterContract;
+
+  // `before` will run only once, useful for deploying the contract and use it on every test
+  // It receives a callback, which can be async.
+  before(async () => {
+    // Get the ContractFactory and Signers here.
     const contractFactory = await ethers.getContractFactory("Greeter");
-    const contract = await contractFactory.deploy("Hello, world!");
-    await contract.deployed();
+    accounts = await ethers.getSigners();
+    // Deploy the contract specifying the constructor arguments
+    greeterContract = await contractFactory.deploy("Hello, Hardhat!");
+    await greeterContract.deployed();
+  });
 
-    expect(await contract.getGreeting()).to.equal("Hello, world!");
-    const setGreetingTx = await contract.setGreeting("Hola, mundo!");
+  it("Should return the new greeting once it's changed", async function () {
+    expect(await greeterContract.getGreeting()).to.equal("Hello, Hardhat!");
+    const setGreetingTx = await greeterContract.setGreeting("Hola, mundo!");
     // wait for the transaction to be mined
     await setGreetingTx.wait();
-    expect(await contract.getGreeting()).to.equal("Hola, mundo!");
+    expect(await greeterContract.getGreeting()).to.equal("Hola, mundo!");
   });
 });