Uncle Longmao
Be cool！
Ethereum Dapp
Points
- Ether VS BitCoin
- Smart Contract
- DApp
Ethereum
Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third-party interference.
Ether VS Bitcoin
How Ethereum
Ethereum Architecture
Ethereum Architecture
Smart Contract
- The Blockchain Technology That Will Replace Lawyers
- self-executing contractual states, stored on the blockchain
Smart Contract-Remix
Smart Contract
Smart Contract
Smart Contract
Smart Contract - Truffle
- contract development framework
- Test Compile Deploy Contracts
ERC20 Token
ERC20 Token-BNB
DApp
Dapp - infura
Secure, reliable, and scalable access to Ethereum APIs
- provides Ethereum clients running in the cloud
Test Ethereum Network (Rinkeby):https://rinkeby.infura.io/<your-token>
Dapp - Web3.js
- Ethereum JavaScript API
- communicates to a local node through RPC calls
- works with any ethereum node,which exposes an RPC layer
Dapp - Web3.js
Dapp - Web3.js
let web3;
// 浏览器环境且已经安装了 Metamask
if (typeof window !== 'undefined' && typeof window.web3 !== 'undefined') {
web3 = new Web3(window.web3.currentProvider);
// 服务器环境或者没有安装 Metamask
} else {
web3 = new Web3(new Web3.providers.HttpProvider(publicRuntimeConfig.infuraUrl));
}
......
const address = '' // Your account address goes here
web3.eth.getBalance(address, (err, wei) => {
balance = web3.utils.fromWei(wei, 'ether')
})Dapp
Dapp
Dapp -- Tutorial
Ethereum Dapp
By Uncle Longmao
