DAPP

什么是 DAPP

DAPP（Decentralized application），WEB3.0 前端，类比传统 WEB 前端。不同区块链平台使用的库不一样，但是大同小异。

DAPP 开发

• web3.0.js
• ethers.js
• https://solana-labs.github.io/solana-web3.js/
• https://sdk.mystenlabs.com/typescript/install

import { Web3 } from "web3";

// Connect to the Ethereum network using the HTTP provider
// const { Web3 } = require('web3');
const ganacheUrl = "http://localhost:7545";
const httpProvider = new Web3.providers.HttpProvider(ganacheUrl);
const web3 = new Web3(httpProvider);

async function main() {
  try {
    // Get the current block number from the network
    const currentBlockNumber = await web3.eth.getBlockNumber();
    console.log("Current block number:", currentBlockNumber);

    // Get the list of accounts in the connected node (e.g., Ganache)
    const accounts = await web3.eth.getAccounts();

    // Send a transaction to the network and wait for the transaction to be mined.
    // Note that sending a transaction with Ganache will cause it, in its default configuration, to min a new block.
    const transactionReceipt = await web3.eth.sendTransaction({
      from: accounts[0],
      to: accounts[1],
      value: web3.utils.toWei("0.001", "ether"),
    });
    console.log("Transaction Receipt:", transactionReceipt);

    // Get the updated block number
    const updatedBlockNumber = await web3.eth.getBlockNumber();
    console.log("Updated block number:", updatedBlockNumber);
  } catch (error) {
    console.error("An error occurred:", error);
  }
}

main();

DAPP 自动化开发

• Alchemy
• Immutable