👛 useWallet()

useWallet() allows dapp users to connect to the provider of their choice in a way that is as straightforward as possible. It provides a common data structure for any connected account, no matter what provider has been chosen by the user. It aims to provide some features that are often reimplemented by dapp developers: connecting to a wallet, keeping track of transactions, and more (submit a issue or PR!).

Features

• All-in-one solution to connect to Ethereum providers.
• Completely library agnostic (use Web3.js, ethers.js, …).
• Provides the current balance.
• Keeps track of the recent transactions (coming soon).

Opinionated?

Oh yes:

• React only.
• Ethereum only (for now).
• Supports one network at a time.
• Embeds as many providers as possible.
• Every prop and parameter is optional.

What useWallet() is not

• An Ethereum wallet implementation.
• A low-level, fully configurable connection system for Ethereum providers (see web3-react if you are after that).
• An general library to interact with Ethereum (see ethers.js, Web3.js, etc.).

Used by

• Aragon client

• Aragon’s Court Dashboard

• Aragon Voice

• Wallets Chat

• (Your project!)

Usage

Add it to your project:

yarn add use-wallet

Use it in your React app:

// App.js

import React from 'react'
import { useWallet, UseWalletProvider } from 'use-wallet'

function App() {
  const wallet = useWallet()
  const blockNumber = wallet.getBlockNumber()

  return (
    <>
      <h1>Wallet</h1>
      {wallet.status === 'connected' ? (
        <div>
          <div>Account: {wallet.account}</div>
          <div>Balance: {wallet.balance}</div>
          <button onClick={() => wallet.reset()}>disconnect</button>
        </div>
      ) : (
        <div>
          Connect:
          <button onClick={() => wallet.connect()}>MetaMask</button>
          <button onClick={() => wallet.connect('frame')}>Frame</button>
          <button onClick={() => wallet.connect('portis')}>Portis</button>
        </div>
      )}
    </>
  )
}

// Wrap everything in <UseWalletProvider />
export default () => (
  <UseWalletProvider
    chainId={1}
    connectors={{
      // This is how connectors get configured
      portis: { dAppId: 'my-dapp-id-123-xyz' },
    }}
  >
    <App />
  </UseWalletProvider>
)

API

<UseWalletProvider />

This is the provider component. It should be placed above any component using useWallet(). Apart from children, it accepts two other props:

chainId

The Chain ID supported by the connection. Defaults to 1.

connectors

Configuration for the different connectors. If you use a connector that requires a configuration but do not provide one, an error will be thrown.

• injected: no configuration needed.
• frame: no configuration needed.
• fortmatic: { apiKey }
• portis: { dAppId }
• provided: { provider }
• authereum: no configuration needed.
• squarelink: { clientId, options }
• walletconnect: { rpcUrl }
• walletlink: { url, appName, appLogoUrl }

See the web3-react documentation for more details.

autoConnect

Automatically connect to wallet on page load. Defaults to false.

useWallet()

This is the hook to be used throughout the app.

It takes an optional object as a single param, containing the following:

• pollBalanceInterval: the interval used to poll the wallet balance. Defaults to 2000.
• pollBlockNumberInterval: the interval used to poll the block number. Defaults to 5000.

It returns an object representing the connected account (“wallet”), containing:

• account: the address of the account, or null when disconnected.
• balance: the balance of the account, in wei.
• chainId: The specified Chain ID of the network you're connected to.
• connect(connectorId): call this function with a connector ID to “connect” to a provider (see above for the connectors provided by default).
• connector: The "key" of the wallet you're connected to (e.g "metamask", "portis").
• connectors: the full list of connectors.
• error: contains an error object with the corresponding name and message if status is set to error.
• ethereum: the connected Ethereum provider.
• getBlockNumber(): this function returns the current block number. This is a function because the block number updates often, which could trigger as many extra renders. Making an explicit call for the block number allows users of useWallet() to avoid extra renders when the block number is not needed.
• isConnected(): this function returns whether the wallet is connected.
• networkName: a human-readable name corresponding to the Chain ID.
• reset(): call this function to “disconnect” from the current provider. This will also clean the latest error value stored in use-wallet's state.
• status: contains the current status of the wallet connection. The possible values are:
  • "disconnected": no wallet connected (default state).
  • "connecting": trying to connect to the wallet.
  • "connected": connected to the wallet (i.e. the account is available).
  • "error": a connection error happened.
• type: whether or not the account is a contract. Can be null when you're disconnected, or either "contract" or "normal".

Examples

To run the examples, switch to the respective directories. Then, simply run yarn install to install, and yarn start to run the examples on localhost:1234.

Special thanks

useWallet() is a built on web3-react and its connectors, which are doing all the hard work internally.