A step-by-step guide on how to build a Web3 website to achieve decentralized user interaction features.

Building a Web3 website, the core goal is to achieve decentralized user interaction, allowing users not only to browse content but also to interact directly with smart contracts on the blockchain. Below, step by step, I will teach you how to build such a website, suitable for beginners in the cryptocurrency and Web3 space.

Web3 Wallet

Choose the Right Blockchain Network and Development Environment#

To build a Web3 website, the first step is to determine which blockchain network to use. Ethereum is the most mainstream choice, supporting a rich array of smart contracts and ecosystem tools. You can also choose networks like Binance Smart Chain (BSC) or Polygon, which have lower transaction fees and faster speeds.

For the development environment, it is recommended to use Remix IDE to write smart contracts online, or set up local frameworks like Truffle or Hardhat. Here, we will take Hardhat as an example:

Install Node.js and npm.
Run npm init -y in the project directory to initialize the project.
Install Hardhat: npm install --save-dev hardhat.
Run npx hardhat, and choose to create a simple JavaScript project.

This sets up the smart contract development environment.

Write Smart Contracts to Implement Core Functions#

Smart contracts are the soul of a Web3 website, responsible for managing user data and interaction logic. For a simple example, write a contract that allows users to store and read messages:

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

contract MessageBoard {

    string[] public messages;

    function postMessage(string memory _message) public {

        messages.push(_message);

    }

    function getMessage(uint _index) public view returns (string memory) {

        require(_index < messages.length, "Index out of range");

        return messages[_index];

    }

    function getMessagesCount() public view returns (uint) {

        return messages.length;

    }

}

This contract allows users to post messages, and anyone can read the message content.

Deploy Smart Contracts to the Test Network#

After writing the contract, deploy it to a test network (such as Rinkeby or Goerli) to verify its functionality. Hardhat configures the deployment script, connects to a wallet (MetaMask), and test network nodes (using APIs provided by Infura or Alchemy).

Deployment steps:

Configure hardhat.config.js, adding test network information.
Write the deployment script deploy.js, calling the contract deployment function.
Run npx hardhat run scripts/deploy.js --network goerli to complete the deployment.

Once deployed successfully, obtain the contract address for future front-end calls.

Build the Frontend to Enable User Interaction#

The front end is responsible for displaying content and interacting with smart contracts. It is recommended to use the React framework, along with the Web3.js or Ethers.js library to connect to the blockchain.

Example steps:

Create a React project: npx create-react-app web3-site.
Install Ethers.js: npm install ethers.
Import Ethers.js in the page and connect the user's wallet:

import { ethers } from "ethers";

async function connectWallet() {

  if (window.ethereum) {

    await window.ethereum.request({ method: "eth_requestAccounts" });

    const provider = new ethers.providers.Web3Provider(window.ethereum);

    const signer = provider.getSigner();

    return signer;

  } else {

    alert("Please install MetaMask wallet");

  }

}

Call the contract method to post a message:

const contractAddress = "your contract address";

const abi = [ /* contract ABI */ ];

async function postMessage(message) {

  const signer = await connectWallet();

  const contract = new ethers.Contract(contractAddress, abi, signer);

  const tx = await contract.postMessage(message);

  await tx.wait();

  alert("Message posted successfully");

}

Read the list of messages:

async function getMessages() {

  const provider = new ethers.providers.Web3Provider(window.ethereum);

  const contract = new ethers.Contract(contractAddress, abi, provider);

  const count = await contract.getMessagesCount();

  let messages = [];

  for (let i = 0; i < count; i++) {

    const msg = await contract.getMessage(i);

    messages.push(msg);

  }

  return messages;

}

The front-end page can be designed as a message board, where users can post and view messages after connecting their wallets, truly achieving decentralized interaction.

Domestic users may encounter access restrictions when visiting exchanges. It is recommended to use the navigation provided by Hyperlink Navigation for various exchange backup domains for convenient access:

These backup domains ensure that you can smoothly access exchanges, manage assets, and participate in trading.

Summary#

The key to building a Web3 website lies in smart contract development, deployment, and front-end interaction implementation. By setting up the development environment with Hardhat, writing simple contracts to implement user functions, deploying to the test network for verification, and then using React and Ethers.js to build the front-end page, decentralized user interaction is completed. Combined with the backup domains provided by Hyperlink Navigation, domestic users can more easily participate in the cryptocurrency ecosystem. Mastering these steps makes building a Web3 website no longer difficult, truly achieving a decentralized experience empowered by blockchain.

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