@web3-onboard/vue

A collection of composable functions for implementing web3-onboard in to a Vue project; compatible both with Vue 2 + composition-api and Vue 3

Install Modules

NPM npm i @web3-onboard/vue @web3-onboard/injected-wallets ethers

Yarn yarn add @web3-onboard/vue @web3-onboard/injected-wallets ethers

Quickstart

import { init } from '@web3-onboard/vue'
import injectedModule from '@web3-onboard/injected-wallets'

const injected = injectedModule()

// Only one RPC endpoint required per chain
const rpcAPIKey = '<INFURA_KEY>' || '<ALCHEMY_KEY>'
const rpcUrl = `https://eth-mainnet.g.alchemy.com/v2/${rpcAPIKey}` || `https://mainnet.infura.io/v3/${rpcAPIKey}`

const web3Onboard = init({
  wallets: [injected],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      rpcUrl
    }
  ]
})

const { wallets, connectWallet, disconnectConnectedWallet, connectedWallet } =
  useOnboard()

if (connectedWallet) {
  // if using ethers v6 this is:
  // ethersProvider = new ethers.BrowserProvider(wallet.provider, 'any')
  const ethersProvider = new ethers.providers.Web3Provider(
    connectedWallet.provider,
    'any'
  )
  // ..... do stuff with the provider
}

Functions

init

The init function initializes web3-onboard and makes it available to the useOnboard() composable. For references check out the initialization docs for @web3-onboard/core

Example usage

import { init } from '@web3-onboard/vue'
import injectedModule from '@web3-onboard/injected-wallets'

const injected = injectedModule()
const infuraKey = '<INFURA_KEY>'
const rpcUrl = `https://mainnet.infura.io/v3/${infuraKey}`

const web3Onboard = init({
  wallets: [injected],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      rpcUrl
    }
  ]
})

useOnboard

useOnboard must be used after the init function has been called - it will return an object that can be destructured to obtain the following reactive variables and functions:

Example usage

import { useOnboard } from '@web3-onboard/vue'
// Use the composable
const onboard = useOnboard()
// Or destructure it
const { wallets, connectWallet, disconnectConnectedWallet, connectedWallet } =
  useOnboard()
// do stuff

connectWallet

Function to open the onboard modal and connect to a wallet provider. For reference check out the connecting a wallet for @web3-onboard/core

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectWallet } = useOnboard()
    const connect = async () => connectWallet()
    return { connect }
  }
}
</script>

<template>
  <button type="button" @click="connect">Connect to a Wallet</button>
</template>

connectedChain

Computed property that contains the current chain to which connectedWallet is connected

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectedChain } = useOnboard()
    return { connectedChain }
  }
}
</script>

<template>
  <span>Connected Chain: {{ connectedChain.id }}</span>
</template>

connectedWallet

Computed property that contains the latest connected wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectedWallet } = useOnboard()
    return { connectedWallet }
  }
}
</script>

<template>
  <span>Connected Wallet: {{ connectedWallet.label }}</span>
</template>

connectingWallet

Readonly boolean ref that tracks the state of the wallet connection status

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectingWallet } = useOnboard()
    return { connectingWallet }
  }
}
</script>

<template>
  <span v-if="connectingWallet">Connecting...</span>
</template>

disconnectWallet

Function to disconnect a specific wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { disconnectWallet } = useOnboard()
    const disconnect = async () => disconnectWallet('MetaMask')
    return { disconnect }
  }
}
</script>

<template>
  <button type="button" @click="disconnect">Disconnect MetaMask</button>
</template>

disconnectConnectedWallet

Function to disconnect the connectedWallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { disconnectConnectedWallet } = useOnboard()
    return { disconnectConnectedWallet }
  }
}
</script>

<template>
  <button type="button" @click="disconnectConnectedWallet">
    Disconnect connectedWallet
  </button>
</template>

getChain

Function that returns the current chain a wallet is connected to

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { getChain } = useOnboard()
    return { getChain }
  }
}
</script>

<template>
  <span>MetaMask is connected to: {{ getChain('MetaMask') }}</span>
</template>

setChain

Function to set the chain of a wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { setChain } = useOnboard()
    const set = () => setChain({ wallet: 'MetaMask', chainId: '0x1' })
    return { set }
  }
}
</script>

<template>
  <button type="button" @click="set">Set MetaMask chain to mainnet</button>
</template>

settingChain

Readonly boolean ref that tracks the status of setting the chain

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { settingChain } = useOnboard()
    return { settingChain }
  }
}
</script>

<template>
  <span v-if="settingChain">Setting chain...</span>
</template>

wallets

Readonly ref that contains every wallet that has been connected

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { wallets } = useOnboard()
    return { wallets }
  }
}

alreadyConnectedWallets

Readonly ref that contains every wallet that user connected to in the past; useful to reconnect wallets automatically after a reload

Example usage

vue
<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { alreadyConnectedWallets } = useOnboard()
    return { alreadyConnectedWallets }
  }
}
</script>

<template>
  <div v-for="wallet in wallets">
    <span>Label: {{wallet.label}}</span>
  </div>
</template>

lastConnectedTimestamp

Readonly ref that contains the last time that the user connected a wallet in milliseconds

Example usage

vue
<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { lastConnectedTimestamp } = useOnboard()
    return { lastConnectedTimestamp }
  }
}
</script>

<template>
  <span>Your last connection timestamp was: {{ lastConnectedTimestamp }}</span>
</template>