Ajouter le bouton de "Mint NFT"sur votre 사이트 웹

40301 단어 blockchainnftsoliditynfts
Les projets de NFTs de collections plus célèbres ont commencé avec une 웹사이트는 민트를 부어줍니다. va créer un smart contract en Goerli déployer une UI avec un bouton de mint에 대한 비디오입니다.



의존성



Pour ce tutorialiel tu vas avoir besoin de NodeJs , je vous conseille de le télécharger avec NVM , aussi on aura besoin d'une RPC URL, je vous conseille d'utiliser INFURA , et puis Metamask avec du GoerliETH que to peux trouver dans unFaucet .

1. 초기 구성




mkdir MyNFTCollection
cd MyNFTCollection
npm install --save-dev truffle dotenv @truffle/hdwallet-provider @openzeppelin/contracts
npx truffle init

truffle-config.js
require('dotenv').config()
const HDWalletProvider = require('@truffle/hdwallet-provider');

const fs = require('fs');

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1",
      port: 8545,
      network_id: "*",
    },
    goerli: {
      provider: function () {
        return new HDWalletProvider(process.env.PRIVATE_KEY, process.env.GOERLI_RPC_URL);
      },
      network_id: 4,
      gas: 4000000,
      networkCheckTimeout: 10000
    }
  },
  mocha: {
  },
  compilers: {
    solc: {
      version: "0.8.16",
    }
  },
  db: {
    enabled: false
  }
};


2. 배포자 계약



Créez et éditez le contrat suivant a votre convenance.
contracts/MyNFT.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.16;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyNFT is ERC721Enumerable {
    uint256 public MAX_ELEMENTS = 5;
    uint256 public PRICE = 0.01 ether;
    address public CREATOR = 0x0000000000000000000000000000000000000000;
    uint256 public token_count;
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIdTracker;

    constructor() ERC721("My NFT", "MNFT") {}

    function _baseURI() internal view virtual override returns (string memory) {
        return "MIURL";
    }

    function _totalSupply() internal view returns (uint) {
        return _tokenIdTracker.current();
    }

    function totalMint() public view returns (uint256) {
        return _totalSupply();
    }

    function mint(address _to, uint256 _count) public payable {
        uint256 total = _totalSupply();
        require(total + _count <= MAX_ELEMENTS, "Max limit");
        require(total <= MAX_ELEMENTS, "Sale end");
        require(msg.value >= PRICE*_count, "Value below price");

        for (uint256 i = 0; i < _count; i++) {
            _mintAnElement(_to);
        }
    }

    function _mintAnElement(address _to) private {
        uint id = _totalSupply();
        _tokenIdTracker.increment();
        _safeMint(_to, id);
    }

    function withdrawAll() public {
        (bool success, ) = CREATOR.call{value:address(this).balance}("");
        require(success, "Transfer failed.");
    }
}

migrations/1_my_deploy.js
const MyNFT = artifacts.require("MyNFT")

module.exports = async function (deployer) {
  await deployer.deploy(MyNFT)
}

.env
GOERLI_RPC_URL=YOURRPCKEY
PRIVATE_KEY=YOURPRIVATEKEY




npx truffle migrate --network goerli


3. 르 프론트엔드



Créez le dossierclient/contracts , creez dedans le fichierMyNFTABI.json et copypastez dedans l'atributabi dans le fichierbuild/contracts/MyNFT.json . 또한 HTML 및 JS를 투표 편의성으로 수정합니다.
client/index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
</head>
<body>
  <input id="connect_button" type="button" value="Connect" onclick="connectWallet()" style="display: none"></input>
  <p id="account_address" style="display: none"></p>
  <p id="web3_message"></p>
  <p id="contract_state"></p>
  <select id="mint_amount">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
  </select>
  <input type="button" value="mint!" onclick="_mint()">
  <p id="nft_price"></p>
  <p id="nft_balance"></p>
  <br>
  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/web3/1.3.5/web3.min.js"></script>
  <script type="text/javascript" src="blockchain_stuff.js"></script>
</body>
</html>

<script>
  function _mint()
  {
    mint_amount = document.getElementById("mint_amount").value
    mint(mint_amount)
  }
</script>


Rapelez vous copypaster l'address du contract en MY_NFT_CONTRACT_ADDRESS .
client/blockchain_stuff.js
const NETWORK_ID = 5

const MY_NFT_CONTRACT_ADDRESS = "0xc7c463b90B393b4A0d3650Aa70a08211a6D5fB79"
const MY_NFT_CONTRACT_ABI_PATH = "./MyNFTABI.json"
var my_nft_contract
var price

var accounts
var web3

function metamaskReloadCallback() {
  window.ethereum.on('accountsChanged', (accounts) => {
    document.getElementById("web3_message").textContent="Network changed, refreshing...";
    window.location.reload()
  })
  window.ethereum.on('networkChanged', (accounts) => {
    document.getElementById("web3_message").textContent="Network chainged, refreshing...";
    window.location.reload()
  })
}

const getWeb3 = async () => {
  return new Promise((resolve, reject) => {
    if(document.readyState=="complete")
    {
      if (window.ethereum) {
        const web3 = new Web3(window.ethereum)
        window.location.reload()
        resolve(web3)
      } else {
        reject("must install MetaMask")
        document.getElementById("web3_message").textContent="Error: Connect to Metamask";
      }
    }else
    {
      window.addEventListener("load", async () => {
        if (window.ethereum) {
          const web3 = new Web3(window.ethereum)
          resolve(web3)
        } else {
          reject("must install MetaMask")
          document.getElementById("web3_message").textContent="Error: Please install Metamask";
        }
      });
    }
  });
};

const getContract = async (web3, address, abi_path) => {
  const response = await fetch(abi_path);
  const data = await response.json();

  const netId = await web3.eth.net.getId();
  contract = new web3.eth.Contract(
    data,
    address
    );
  return contract
}

async function loadDapp() {
  metamaskReloadCallback()
  document.getElementById("web3_message").textContent="Please connect to Metamask"
  var awaitWeb3 = async function () {
    web3 = await getWeb3()
    web3.eth.net.getId((err, netId) => {
      if (netId == NETWORK_ID) {
        var awaitContract = async function () {
          my_nft_contract = await getContract(web3, MY_NFT_CONTRACT_ADDRESS, MY_NFT_CONTRACT_ABI_PATH)
          document.getElementById("web3_message").textContent="You are connected to Metamask"
          onContractInitCallback()
          web3.eth.getAccounts(function(err, _accounts){
            accounts = _accounts
            if (err != null)
            {
              console.error("An error occurred: "+err)
            } else if (accounts.length > 0)
            {
              onWalletConnectedCallback()
              document.getElementById("account_address").style.display = "block"
            } else
            {
              document.getElementById("connect_button").style.display = "block"
            }
          });
        };
        awaitContract();
      } else {
        document.getElementById("web3_message").textContent="Please connect to Goerli";
      }
    });
  };
  awaitWeb3();
}

async function connectWallet() {
  await window.ethereum.request({ method: "eth_requestAccounts" })
  accounts = await web3.eth.getAccounts()
  onWalletConnectedCallback()
}

loadDapp()

const onContractInitCallback = async () => {
  price = await my_nft_contract.methods.PRICE().call()
  document.getElementById("nft_price").textContent = "NFT Price: " + web3.utils.fromWei(price) + " ETH";
}

const onWalletConnectedCallback = async () => {
  balance = await my_nft_contract.methods.balanceOf(accounts[0]).call()
  document.getElementById("nft_balance").textContent= "Your balance: " + balance;
}


//// Functions ////

const mint = async (amount) => {
  const result = await my_nft_contract.methods.mint(accounts[0], amount)
  .send({ from: accounts[0], gas: 0, value: price * amount })
  .on('transactionHash', function(hash){
    document.getElementById("web3_message").textContent="Executing...";
  })
  .on('receipt', function(receipt){
    document.getElementById("web3_message").textContent="Success.";    })
  .catch((revertReason) => {
    console.log("ERROR! Transaction reverted: " + revertReason.receipt.transactionHash)
  });
}


4. Essayons le 사이트 웹




npm install -g lite-server
cd client
lite-server


On peut voir le resultat surhttp://localhost:3000 .

스마트 컨트랙트 및 어댑터 l'UI du 사이트 웹에 대한 유지 관리. Je vous conseille d'utiliser Netlify는 배포자, c'est gratuit et simple을 제공합니다. De plus, utilisez le répo surGithub si vous avez besoin.

¡수업에 대한 자비를 베푸소서!
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웹사이트의 "Mint NFT"버튼

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