# Getting Started ## Installation Install the core Onboard library and the injected wallets module to support browser extension and mobile wallets: ```bash copy npm i @web3-onboard/core @web3-onboard/injected-wallets ``` ## Quick Start Then initialize in your app: ```js copy lineNumbers import Onboard from '@web3-onboard/core' import injectedModule from '@web3-onboard/injected-wallets' import { ethers } from 'ethers' const MAINNET_RPC_URL = 'https://mainnet.infura.io/v3/' const injected = injectedModule() const onboard = Onboard({ wallets: [injected], chains: [ { id: '0x1', token: 'ETH', label: 'Ethereum Mainnet', rpcUrl: MAINNET_RPC_URL }, { id: '0x2105', token: 'ETH', label: 'Base', rpcUrl: 'https://mainnet.base.org' } ] }) const wallets = await onboard.connectWallet() console.log(wallets) if (wallets[0]) { // create an ethers provider with the last connected wallet provider const ethersProvider = new ethers.providers.Web3Provider(wallets[0].provider, 'any') // if using ethers v6 this is: // ethersProvider = new ethers.BrowserProvider(wallet.provider, 'any') const signer = ethersProvider.getSigner() // send a transaction with the ethers provider const txn = await signer.sendTransaction({ to: '0x', value: 100000000000000 }) const receipt = await txn.wait() console.log(receipt) } ```