mint NFTs + deploy on testnet

README.md

@@ -2,6 +2,8 @@
 
 Demo NFT collection for learning purposes.
 
+https://testnets.opensea.io/collection/squarenft-lsikgsvytr
+
 ## Built With
 
 - [Solidity](https://soliditylang.org/)

contracts/EpicNFT.sol

@@ -2,9 +2,22 @@
 pragma solidity ^0.8.0;
 
 import "hardhat/console.sol";
+import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
+import "@openzeppelin/contracts/utils/Counters.sol";
 
-contract EpicNFT {
+contract EpicNFT is ERC721URIStorage {
-    constructor() {
+    using Counters for Counters.Counter;
-        console.log("My first NFT contract!");
+    Counters.Counter private _tokenIds;
+
+    constructor() ERC721("SquareNFT", "SQUARE") {
+        console.log("My first NFT contract! EPIC!!!");
+    }
+
+    function mint() public {
+        uint256 tokenID = _tokenIds.current();
+        _safeMint(msg.sender, tokenID);
+        _setTokenURI(tokenID, "https://jsonkeeper.com/b/EU51"); // points to the metadata JSON file
+        console.log("NFT %s minted to %s", tokenID, msg.sender);
+        _tokenIds.increment();
     }
 }

hardhat.config.js

@@ -1,4 +1,5 @@
 require("@nomiclabs/hardhat-waffle");
+require("dotenv").config();
 
 task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
   const accounts = await hre.ethers.getSigners();
@@ -13,4 +14,14 @@ task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  */
 module.exports = {
   solidity: "0.8.4",
+  networks: {
+    rinkeby: {
+      url: process.env.STAGING_URL,
+      accounts: [process.env.PRIVATE_KEY],
+    },
+    mainnet: {
+      url: process.env.PROD_URL,
+      accounts: [process.env.PRIVATE_KEY],
+    },
+  },
 };

package.json

@@ -4,7 +4,9 @@
   "main": "index.js",
   "license": "MIT",
   "scripts": {
-    "dev": "npx hardhat run scripts/run.js"
+    "dev": "npx hardhat run scripts/run.js",
+    "deploy:testnet": "npx hardhat run scripts/deploy.js --network rinkeby",
+    "test": "npx hardhat test"
   },
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.0",
@@ -15,6 +17,7 @@
     "hardhat": "^2.9.3"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^4.5.0"
+    "@openzeppelin/contracts": "^4.5.0",
+    "dotenv": "^16.0.0"
   }
 }

scripts/deploy.js

@@ -0,0 +1,27 @@
+const { ethers } = require("hardhat"); // this import is optional
+
+async function main() {
+  const EpicNFT = await ethers.getContractFactory("EpicNFT");
+  const contract = await EpicNFT.deploy();
+  await contract.deployed();
+  console.log("EpicNFT deployed to:", contract.address);
+
+  let txn = await contract.mint();
+  txn.wait();
+  console.log("Mint NFT #1")
+
+  txn = await contract.mint();
+  txn.wait();
+  console.log("Mint NFT #2")
+}
+
+// run the script
+(async () => {
+  try {
+    await main();
+    process.exit(0);
+  } catch (err) {
+    console.error(err);
+    process.exit(1);
+  }
+})();

scripts/run.js

@@ -1,12 +1,19 @@
-const hre = require("hardhat"); // this import is optional
+const { ethers } = require("hardhat"); // this import is optional
 
 async function main() {
-  const EpicNFT = await hre.ethers.getContractFactory("EpicNFT");
+  const EpicNFT = await ethers.getContractFactory("EpicNFT");
   const contract = await EpicNFT.deploy();
   await contract.deployed();
   console.log("EpicNFT deployed to:", contract.address);
+
+  let txn = await contract.mint();
+  txn.wait();
+
+  txn = await contract.mint();
+  txn.wait();
 }
 
+// run the script
 (async () => {
   try {
     await main();

test/epicNFT.spec.js

@@ -0,0 +1,14 @@
+const { expect } = require("chai");
+const { ethers } = require("hardhat");
+
+describe("EpicNFT", function () {
+  it("Should increment token count after each mint", async () => {
+    const EpicNFT = await ethers.getContractFactory("EpicNFT");
+    const contract = await EpicNFT.deploy();
+    await contract.deployed();
+    const txn = await contract.mint();
+    txn.wait();
+
+    expect(contract._tokenIds).to.equal(1);
+  });
+});

test/run.js

@@ -1,19 +0,0 @@
-const { expect } = require("chai");
-const { ethers } = require("hardhat");
-
-describe("Greeter", function () {
-  it("Should return the new greeting once it's changed", async function () {
-    const Greeter = await ethers.getContractFactory("Greeter");
-    const greeter = await Greeter.deploy("Hello, world!");
-    await greeter.deployed();
-
-    expect(await greeter.greet()).to.equal("Hello, world!");
-
-    const setGreetingTx = await greeter.setGreeting("Hola, mundo!");
-
-    // wait until the transaction is mined
-    await setGreetingTx.wait();
-
-    expect(await greeter.greet()).to.equal("Hola, mundo!");
-  });
-});

yarn.lock

@@ -2556,6 +2556,11 @@ dom-walk@^0.1.0:
   resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.2.tgz#0c548bef048f4d1f2a97249002236060daa3fd84"
   integrity sha512-6QvTW9mrGeIegrFXdtQi9pk7O/nSK6lSdXW2eqUspN5LWD7UTji2Fqw5V2YLjBpHEoU9Xl/eUWNpDeZvoyOv2w==
 
+dotenv@^16.0.0:
+  version "16.0.0"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.0.0.tgz#c619001253be89ebb638d027b609c75c26e47411"
+  integrity sha512-qD9WU0MPM4SWLPJy/r2Be+2WgQj8plChsyrCNQzW/0WjvcJQiKQJ9mH3ZgB3fxbUUxgc/11ZJ0Fi5KiimWGz2Q==
+
 dotignore@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/dotignore/-/dotignore-0.1.2.tgz#f942f2200d28c3a76fbdd6f0ee9f3257c8a2e905"