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indexsolution.txt
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<html>
<head>
<title>NFT Minter on Testnet - Mint your NFT for free!</title>
<!-- Moralis SDK code -->
<script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>
<script src="https://unpkg.com/moralis/dist/moralis.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>NFT Minter for Beginners</h1>
<h2 id="h2"></h2>
<button class="btns" id="btn-connect">Connect Metamask</button>
<br><br>
<div class=container-grey>
<br><br>
<input type="text" name="metadataName" id="metadataName" placeholder="Title">
<br><br>
<textarea name="metadataDescription" id="metadataDescription" col="30" rows="10" placeholder="Description"></textarea>
<br><br>
<input type="file" name="fileInput" id="fileInput">
<br><br>
<button class="btns" id="btn-mint" onclick="mint()">MINT NFT</button>
</div>
<div id="transactionhash"></div>
<div id="opensea"></div> <!-- Assignment -->
<script>
// on click of Metamask button login() function is called, and connected address is displayed
$(document).ready(function(){
let flag=0;
$("#btn-connect").click(async function(){
const connectedAccount = await login();
console.log(connectedAccount);
if(flag==0){
$("#h2").append("<b>Welcome<br>"+connectedAccount+"</b>.");
flag=1;
}
$("#btn-connect").hide();
});
});
</script>
<script>
// connect to Moralis server
Moralis.initialize("DFxrxNdKMK8P0gSaD08AE29atUaGX7nHPxsuVCy2");
Moralis.serverURL = "https://czvhzc4pphqs.grandmoralis.com:2053/server";
//initialize var contract and var accounts, assign NFTMinterAddress
var contract;
var accounts;
const NFTMinterAddress = "0x84a9A83F833a34360AEB053Faaf3dc0A87c59EF8";
//add NFTMinter ABI
const NFTMinterABI = [
{
"inputs": [],
"stateMutability": "nonpayable",
"type": "constructor"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "approved",
"type": "address"
},
{
"indexed": true,
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "Approval",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "operator",
"type": "address"
},
{
"indexed": false,
"internalType": "bool",
"name": "approved",
"type": "bool"
}
],
"name": "ApprovalForAll",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "uint256",
"name": "_tokenId",
"type": "uint256"
},
{
"indexed": true,
"internalType": "address",
"name": "NFTOwner",
"type": "address"
},
{
"indexed": false,
"internalType": "string",
"name": "imageURL",
"type": "string"
}
],
"name": "NFTMinted",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "from",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "to",
"type": "address"
},
{
"indexed": true,
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "Transfer",
"type": "event"
},
{
"inputs": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "approve",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "getApproved",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "getTokenID",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"internalType": "address",
"name": "operator",
"type": "address"
}
],
"name": "isApprovedForAll",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "string",
"name": "_tokenURI",
"type": "string"
}
],
"name": "mintNFT",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"name": "name",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "ownerOf",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "safeTransferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
},
{
"internalType": "bytes",
"name": "_data",
"type": "bytes"
}
],
"name": "safeTransferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "operator",
"type": "address"
},
{
"internalType": "bool",
"name": "approved",
"type": "bool"
}
],
"name": "setApprovalForAll",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "bytes4",
"name": "interfaceId",
"type": "bytes4"
}
],
"name": "supportsInterface",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "symbol",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "tokenURI",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "transferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
}
]
//Connect and login
login = async() => {
//Moralis Web3 authenticate user with Metamask and login.
Moralis.Web3.authenticate().then(function(user) {
console.log("Logged in");
})
//Enable web3 with Moralis
const web3 = await Moralis.Web3.enable();
//initialize contract with web3.js - web3.eth.Contract(ABI, address)
contract = new web3.eth.Contract(NFTMinterABI, NFTMinterAddress); //web3.eth.Contract(ABI, Address)
console.log(contract);
//get accounts to be shown on frontend - accounts[0]
accounts = await web3.eth.getAccounts();
currentAccount = accounts[0];
//return currentAccount
return currentAccount;
}
//Upload Image to IPFS
uploadImage = async() => {
//TBD
//get file data from browser
const data = fileInput.files[0]
//initialize Moralis object for file
const file = new Moralis.File(data.name, data)
//save file to IPFS
await file.saveIPFS();
console.log(file.ipfs());
alert("Image uploaded to IPFS");
//return IPFS link to file
return file.ipfs() //returns the link to the IPFS file
}
//Upload Metadata to IPFS
uploadMetadata = async (imageURL) => {
//get name of image from HTML form
const name = document.getElementById('metadataName').value;
//get description from HTML form
const description = document.getElementById('metadataDescription').value;
//constuct metadata JSON (name : name, description : description, image: imageURL)
const metadata = {
"name" : name,
"description" : description,
"image" : imageURL
}
//initialize Moralis object for file
const file = new Moralis.File("file.json", {base64 : btoa(JSON.stringify(metadata))});
//save file to IPFS
await file.saveIPFS();
console.log(file.ipfs());
alert("Metadata uploaded to IPFS", file.ipfs());
//return IPFS link to file
return file.ipfs();
}
//Mint NFT with IPFS Metadata
//IPFS - Inter Planetary File System
mint = async() => {
//upload image
const image = await uploadImage();
//upload metadata
const metadata = await uploadMetadata(image);
/*
name: Abcd
description: hello world
uri: hello.jpeg
*/
//if contract !== undefined, then call mintNFT() solidity function.
if(contract!=='undefined'){
try{
//calling tokenID to redirect on OPENSEA
const tokenID = await contract.methods.getTokenID().call({from: accounts[0]}); //calling tokenID to redirect on OPENSEA
console.log("Token ID: ", tokenID);
//actually minting NFT.
await contract.methods.mintNFT(metadata).send({from: accounts[0]})
.on('transactionHash', function(hash){
alert("Your transaction can be found at: "+"https://rinkeby.etherscan.io/tx/"+hash);
/*JQuery*/ $("#transactionhash")
.append("<b>Your transaction can be found at: <br>"+"<a href='https://rinkeby.etherscan.io/tx/"+hash+"'>https://rinkeby.etherscan.io/tx/"+hash+"</a></b");
})
.on('receipt', function(receipt){
// receipt example
console.log(receipt);
alert("Your transaction has been confirmed at: " + "https://rinkeby.etherscan.io/tx/"+receipt.transactionHash);
$("#opensea")
.append("<b>Your NFT can be viewed on OpenSea at: <br>"+"<a href='https://testnets.opensea.io/assets/"+NFTMinterAddress+"/"+tokenID+"'>https://testnets.opensea.io/assets/"+NFTMinterAddress+"/"+tokenID+"</a></b");
})
//Action on Error
//assignment https://web3js.readthedocs.io/en/v1.5.2/web3-eth-contract.html#methods-mymethod-send
.on('error', function(error, receipt) { // If the transaction was rejected by the network with a receipt, the second parameter will be the receipt.
console.log("Error. The transaction has been rejected.");
console.log(receipt);
alert("The transaction was rejected");
});
} catch (e) {
console.log('Error while minting function was called ', e)
}
}
}
</script>
</body>
</html>