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@web3-onboard/core

This is the core package that contains all of the UI and logic to be able to seamlessly connect user's wallets to your app and track the state of those wallets. Onboard no longer contains any wallet specific code, so wallets need to be passed in upon initialization.

Installation

Install the core module:

npm i @web3-onboard/core

If you would like to support all wallets, then you can install all of the wallet modules:

npm i @web3-onboard/injected-wallets @web3-onboard/coinbase @web3-onboard/ledger @web3-onboard/trezor @web3-onboard/keepkey @web3-onboard/walletconnect @web3-onboard/web3auth @web3-onboard/torus @web3-onboard/portis @web3-onboard/mew @web3-onboard/gnosis @web3-onboard/magic @web3-onboard/fortmatic @web3-onboard/dcent

Note:

Initialization

Onboard needs to be initialized with an options object before the API can be used:

type InitOptions {
  wallets: WalletInit[]
  chains: Chain[]
  appMetadata?: AppMetadata
  i18n?: i18nOptions
  accountCenter?: AccountCenterOptions
  apiKey?: string
  notify?: Partial<NotifyOptions>
  connect?: Partial<ConnectModalOptions>
  gas?: typeof gas
  /**
   * Object mapping for W3O components with the key being the component and the value the DOM element to mount the component to. This element must be available at time of package script execution.
   */
  containerElements?: Partial<ContainerElements>
}

Options

wallets An array of wallet modules that you would like to be presented to the user to select from when connecting a wallet. A wallet module is an abstraction that allows for easy interaction without needing to know the specifics of how that wallet works and are separate packages that can be included. A list of wallet module packages that can be installed can be found here.

chains An array of Chains that your app supports:

type Chain = {
  id: ChainId // hex encoded string, eg '0x1' for Ethereum Mainnet
  namespace?: 'evm' // string indicating chain namespace. Defaults to 'evm' but will allow other chain namespaces in the future
  rpcUrl: string // used for network requests (eg Alchemy or Infura end point)
  label: string // used for display, eg Ethereum Mainnet
  token: TokenSymbol // the native token symbol, eg ETH, BNB, MATIC
  color?: string // the color used to represent the chain and will be used as a background for the icon
  icon?: string // the icon to represent the chain
  publicRpcUrl?: string // an optional public RPC used when adding a new chain config to the wallet
  blockExplorerUrl?: string // also used when adding a new config to the wallet
}

appMetadata An object that defines your app:

type AppMetadata = {
  // app name
  name: string
  // SVG icon string, with height or width (whichever is larger) set to 100% or a valid image URL
  // note: if using an emoji make sure to send base64 string
  icon: string
  // Optional wide format logo (ie icon and text) to be displayed in the sidebar of connect modal. Defaults to icon if not provided
  logo?: string
  // description of app
  description?: string
  // url to a getting started guide for app
  gettingStartedGuide?: string
  // url that points to more information about app
  explore?: string
  // if your app only supports injected wallets and when no injected wallets detected, recommend the user to install some
  recommendedInjectedWallets?: RecommendedInjectedWallets[]
}

type RecommendedInjectedWallets = {
  name: string // display name
  url: string // link to download wallet
}

connect An object that allows for customization of the Connect Modal and accepts the type ConnectModalOptions.

type ConnectModalOptions = {
  showSidebar?: boolean
}

i18n An object that defines the display text for different locales. Can also be used to override the default text. To override the default text, pass in a object for the en locale.

type Locale = string // eg 'en', 'es'
type i18nOptions = Record<Locale, i18n>

To see a list of all of the text values that can be internationalized or replaced, check out the default en file. Onboard is using the ICU syntax for formatting under the hood.

containerElements An object mapping for W3O components with the key being the DOM element to mount the specified component to. This defines the DOM container element for svelte to attach the component.

NOTE: containerElement must be a DOM element with a styleSheet property attached and the element must be available on the DOM at the time of component mounting. For an example please see containerElement usage here

type ContainerElements = {
  // When attaching the Connect Modal to a container el be aware that the modal was styled to be 
  // mounted through the app to the html body and will respond to screen width rather than container width
  // This is specifically apparent on mobile so please test thoroughly
  // Also consider that other DOM elements(specifically Notifications and Account Center) will also 
  // append to this DOM el if enabled and their own containerEl are not defined
  connectModal?: string
  // when using the accountCenter with a container el the accountCenter position properties are ignored
  accountCenter?: string
}

accountCenter An object that defines whether the account center UI (default and minimal) is enabled and it's position on the screen. Currently the account center is enabled for both desktop and mobile devices.

type AccountCenter = {
  enabled: boolean
  position?: AccountCenterPosition // default: 'topRight'
  expanded?: boolean // default: true
  minimal?: boolean // enabled by default for mobile

  /**
   * @deprecated Use top level containerElements property
   * with the accountCenter prop set to the desired container El
   */
  containerElement?: string // defines the DOM container element for svelte to attach
}

type AccountCenterOptions = {
  desktop: Omit<AccountCenter, 'expanded'>
  mobile: Omit<AccountCenter, 'expanded'>
}

type AccountCenterPosition =
  | 'topRight'
  | 'bottomRight'
  | 'bottomLeft'
  | 'topLeft'

notify Notify provides by default transaction notifications for all connected wallets on the current blockchain. When switching chains the previous chain listeners remain active for 60 seconds to allow capture and report of an remaining transactions that may be in flight. By default transaction notifications are captured if a DAppID is provided in the Onboard config along with the Account Center being enabled. An object that defines whether transaction notifications will display (defaults to true if an API key is provided). This object contains an enabled flag prop and an optional transactionHandler which is a callback that can disable or allow customizations of notifications. Currently notifications are positioned in the same location as the account center (either below, if the Account Center is positioned along the top, or above if positioned on the bottom of the view). The transactionHandler can react off any property of the Ethereum TransactionData returned to the callback from the event (see console.log in example init). In turn, it can return a Custom Notification object to define the verbiage, styling, or add functionality:

  • Notification.message - to completely customize the message shown
  • Notification.eventCode - handle codes in your own way - see codes here under the notify prop default en file here
  • Notification.type - icon type displayed (see NotificationType below for options)
  • Notification.autoDismiss - time (in ms) after which the notification will be dismissed. If set to 0 the notification will remain on screen until the user dismisses the notification, refreshes the page or navigates away from the site with the notifications
  • Notification.link - add link to the transaction hash. For instance, a link to the transaction on etherscan
  • Notification.onClick() - onClick handler for when user clicks the notification element

Notify can also be styled by using the CSS variables found below. These are setup to allow maximum customization with base styling variables setting the global theme (i.e. --onboard-grey-600) along with more precise component level styling variables available (--notify-onboard-grey-600) with the latter taking precedent if defined.

Under the following conditions, when a transaction notification is hovered, a dropdown will appear, allowing the user to replace (speedup or cancel) their transaction:

  • The gas module has been passed in to the Web3 Onboard initialization
  • The transaction was initiated on the networks that the gas module can get estimations for (currently Ethereum and Polygon mainnet)
  • The transaction has a pending status (eventCode: 'txPool')
  • The transaction was initiated by a hardware wallet (possibly other wallet types in future as they recognize the nonce field)

The replacement gas values can be customized from the defaults by using the replacement parameter in the Notify options.

If notifications are enabled the notifications can be handled through onboard app state as seen below.

const wallets = onboard.state.select('notifications')
const { unsubscribe } = wallets.subscribe(update =>
  console.log('transaction notifications: ', update)
)

// unsubscribe when updates are no longer needed
unsubscribe()
type NotifyOptions = {
  desktop: Notify
  mobile: Notify
}
type Notify = {
  enabled: boolean // default: true
  /**
   * Callback that receives all transaction events
   * Return a custom notification based on the event
   * Or return false to disable notification for this event
   * Or return undefined for a default notification
   */
  transactionHandler?: (
    event: EthereumTransactionData
  ) => TransactionHandlerReturn
  position: CommonPositions
  replacement?: {
    gasPriceProbability?: {
      // define the gas price used for speedup based on the probability of getting in to the next block. Default 80
      speedup?: number
      // define the gas price used for cancel based on the probability of getting in to the next block. Default 95
      cancel?: number
    }
  }
}

type CommonPositions = 'topRight' | 'bottomRight' | 'bottomLeft' | 'topLeft'

type TransactionHandlerReturn = CustomNotification | boolean | void

type CustomNotification = Partial<Omit<Notification, 'id' | 'startTime'>>

type Notification = {
  id: string
  key: string
  type: NotificationType
  network: Network
  startTime?: number
  eventCode: string
  message: string
  autoDismiss: number
  link?: string
  onClick?: (event: Event) => void
}

type NotificationType = 'pending' | 'success' | 'error' | 'hint'

export declare type Network =
  | 'main'
  | 'testnet'
  | 'ropsten'
  | 'rinkeby'
  | 'goerli'
  | 'kovan'
  | 'xdai'
  | 'bsc-main'
  | 'matic-main'
  | 'fantom-main'
  | 'matic-mumbai'
  | 'local'

export interface UpdateNotification {
  (notificationObject: CustomNotification): {
    dismiss: () => void
    update: UpdateNotification
  }
}

Initialization Example

Putting it all together, here is an example initialization with the injected wallet modules:

import Onboard from '@web3-onboard/core'
import injectedModule from '@web3-onboard/injected-wallets'

const injected = injectedModule()

// Only one RPC endpoint required per chain
const ETH_MAINNET_RPC = `https://mainnet.infura.io/v3/${INFURA_KEY}` || `https://eth-mainnet.g.alchemy.com/v2/${ALCHEMY_KEY}`
const ETH_ROPSTEN_RPC = `https://ropsten.infura.io/v3/${INFURA_ID}` || `https://eth-ropsten.g.alchemy.com/v2/${ALCHEMY_KEY}`
const ETH_RINKEBY_RPC = `https://rinkeby.infura.io/v3/${INFURA_KEY}` || `https://eth-rinkeby.g.alchemy.com/v2/${ALCHEMY_KEY}`

const onboard = Onboard({
  wallets: [injected],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      rpcUrl: ETH_MAINNET_RPC
    },
    {
      id: '0x3',
      token: 'tROP',
      label: 'Ethereum Ropsten Testnet',
      rpcUrl: ETH_ROPSTEN_RPC
    },
    {
      id: '0x4',
      token: 'rETH',
      label: 'Ethereum Rinkeby Testnet',
      rpcUrl: ETH_RINKEBY_RPC
    },
    {
      id: '0x38',
      token: 'BNB',
      label: 'Binance Smart Chain',
      rpcUrl: 'https://bsc-dataseed.binance.org/'
    },
    {
      id: '0x89',
      token: 'MATIC',
      label: 'Matic Mainnet',
      rpcUrl: 'https://matic-mainnet.chainstacklabs.com'
    },
    {
      id: '0xfa',
      token: 'FTM',
      label: 'Fantom Mainnet',
      rpcUrl: 'https://rpc.ftm.tools/'
    }
  ],
  appMetadata: {
    name: 'Token Swap',
    icon: myIcon, // svg string icon
    logo: myLogo, // svg string logo
    description: 'Swap tokens for other tokens',
    recommendedInjectedWallets: [
      { name: 'MetaMask', url: 'https://metamask.io' },
      { name: 'Coinbase', url: 'https://wallet.coinbase.com/' }
    ]
  },
  apiKey: 'xxx387fb-bxx1-4xxc-a0x3-9d37e426xxxx'
  notify: {
    desktop: {
      enabled: true,
      transactionHandler: transaction => {
        console.log({ transaction })
        if (transaction.eventCode === 'txPool') {
          return {
            type: 'success',
            message: 'Your transaction from #1 DApp is in the mempool',
          }
        }
      },
      position: 'bottomLeft'
    },
    mobile: {
      enabled: true,
      transactionHandler: transaction => {
        console.log({ transaction })
        if (transaction.eventCode === 'txPool') {
          return {
            type: 'success',
            message: 'Your transaction from #1 DApp is in the mempool',
          }
        }
      },
      position: 'topRight'
    }
  },
  accountCenter: {
    desktop: {
      position: 'topRight',
      enabled: true,
      minimal: true
    },
    mobile: {
      position: 'topRight',
      enabled: true,
      minimal: true
    }
  },
  i18n: {
    en: {
      connect: {
        selectingWallet: {
          header: 'custom text header'
        }
      },
      notify: {
        transaction: {
          txStuck: 'custom text for this notification event'
        },
        watched: {
          // Any words in brackets can be re-ordered or removed to fit your dapps desired verbiage
          "txPool": "Your account is {verb} {formattedValue} {asset} {preposition} {counterpartyShortened}"
        }
      }
    },
    es: {
      transaction: {
        txRequest: 'Su transacción está esperando que confirme'
      }
    }
  }
})

Connecting a Wallet

To initiate a user to select and connect a wallet you can call the connectWallet function on an initialized Onboard instance. It will return a Promise that will resolve when the user either successfully connects a wallet, or when they dismiss the UI. The resolved value from the promise will be the latest state of the wallets array. The order of the wallets array is last to first, so the most recently selected wallet will be the first item in the array and can be thought of as the "primary wallet". If no wallet was selected, then the wallets array will have the same state as it had before calling connectWallet.

Example

async function connectWallet() {
  const wallets = await onboard.connectWallet()
  console.log(wallets)
}

connectWallet()

Auto Selecting a Wallet

A common UX pattern is to remember the wallet(s) that a user has previously connected by storing them in localStorage and then automatically selecting them for the user next time they visit your app. You could enable this in your app by first syncing the wallets array to localStorage:

const walletsSub = onboard.state.select('wallets')
const { unsubscribe } = walletsSub.subscribe(wallets => {
  const connectedWallets = wallets.map(({ label }) => label)
  window.localStorage.setItem(
    'connectedWallets',
    JSON.stringify(connectedWallets)
  )
})

// Don't forget to unsubscribe when your app or component un mounts to prevent memory leaks
// unsubscribe()

Now that you have the most recent wallets connected saved in local storage, you can auto select those wallet(s) when your app loads:

const previouslyConnectedWallets = JSON.parse(
  window.localStorage.getItem('connectedWallets')
)

if (previouslyConnectedWallets) {
  // Connect the most recently connected wallet (first in the array)
  await onboard.connectWallet({ autoSelect: previouslyConnectedWallets[0] })

  // You can also auto connect "silently" and disable all onboard modals to avoid them flashing on page load
  await onboard.connectWallet({
    autoSelect: { label: previouslyConnectedWallets[0], disableModals: true }
  })

  // OR - loop through and initiate connection for all previously connected wallets
  // note: This UX might not be great as the user may need to login to each wallet one after the other
  // for (walletLabel in previouslyConnectedWallets) {
  //   await onboard.connectWallet({ autoSelect: walletLabel })
  // }
}

Disconnecting a Wallet

A wallet can be disconnected, which will cleanup any background operations the wallet may be doing and will also remove it from the Onboard wallets array:

// disconnect the first wallet in the wallets array
const [primaryWallet] = onboard.state.get().wallets
await onboard.disconnectWallet({ label: primaryWallet.label })

The disconnectWallet method takes the wallet.label value and returns a Promise that resolves to the current state of the wallets array.

State

Onboard currently keeps track of the following state:

  • wallets: The wallets connected to Onboard
  • chains: The chains that Onboard has been initialized with
  • accountCenter: The current state of the account center UI
  • walletModules: The wallet modules that are currently set and will be rendered in the wallet selection modal
type AppState = {
  wallets: WalletState[]
  chains: Chain[]
  accountCenter: AccountCenter
  walletModules: WalletModule[]
  locale: Locale
  notify: Notify
  notifications: Notification[]
}

type Chain {
  namespace?: 'evm'
  id: ChainId
  rpcUrl: string
  label: string
  token: TokenSymbol
  color?: string
  icon?: string
}

type WalletState = {
  label: string
  icon: string
  provider: EIP1193Provider
  accounts: Account[]
  chains: ConnectedChain[]
  instance?: unknown
}

type Account = {
  address: string
  ens: {
    name?: string
    avatar?: string
    contentHash?: string
    getText?: (key: string) => Promise<string | undefined>
  }
  uns: {
    name?: string
  }
  balance: Record<TokenSymbol, string>
}

type ConnectedChain = {
  namespace: 'evm'
  id: ChainId
}

type ChainId = string
type TokenSymbol = string

type AccountCenter = {
  enabled: boolean
  position: AccountCenterPosition
  expanded: boolean
  minimal: boolean
}

type AccountCenterPosition =
  | 'topRight'
  | 'bottomRight'
  | 'bottomLeft'
  | 'topLeft'

type WalletModule {
  label: string
  getIcon: () => Promise<string>
  getInterface: (helpers: GetInterfaceHelpers) => Promise<WalletInterface>
}

Get Current State

The current state of Onboard can be accessed at any time using the state.get() method:

const currentState = onboard.state.get()

Subscribe to State Updates

State can also be subscribed to using the state.select() method. The select method will return an RXJS Observable. Understanding of RXJS observables is not necessary to subscribe to state updates, but allows for composable functionality if wanted. The key point to understand is that if you subscribe for updates, remember to unsubscribe when you are finished to prevent memory leaks.

To subscribe to all state updates, call the select method with no arguments:

const state = onboard.state.select()
const { unsubscribe } = state.subscribe(update =>
  console.log('state update: ', update)
)

// remember to unsubscribe when updates are no longer needed
// unsubscribe()

Specific top level slices of state can be subscribed to. For example you may want to just subscribe to receive updates to the wallets array only:

const wallets = onboard.state.select('wallets')
const { unsubscribe } = wallets.subscribe(update =>
  console.log('wallets update: ', update)
)

// unsubscribe when updates are no longer needed
unsubscribe()

Actions to Modify State

A limited subset of internal actions are exposed to update the Onboard state.

setWalletModules For updating the wallets that are displayed in the wallet selection modal. This can be used if the wallets you want to support is conditional on another user action within your app. The setWalletModules action is called with an updated array of wallets (the same wallets that are passed in on initialization)

import Onboard from '@web3-onboard/core'
import injectedModule from '@web3-onboard/injected-wallets'
import ledgerModule from '@web3-onboard/ledger'
import trezorModule from '@web3-onboard/trezor'

const injected = injectedModule()
const ledger = ledgerModule()
const trezor = trezorModule({
  email: '<EMAIL_CONTACT>',
  appUrl: '<APP_URL>'
})

// initialize with injected and hardware wallets
const onboard = Onboard({
  wallets: [injected, trezor, ledger],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      // Only one RPC required
      rpcUrl:
        `https://mainnet.infura.io/v3/${INFURA_KEY}` ||
        `https://eth-mainnet.g.alchemy.com/v2/${ALCHEMY_KEY}`
    }
  ]
})

// then after a user action, you may decide to only display hardware wallets on the next call to onboard.connectWallet
onboard.state.actions.setWalletModules([ledger, trezor])

updateBalances You may decide to get updated balances for connected wallets after a user action by calling the updatedBalances function, which expects a conditional array of addresses:

onboard.state.actions.updateBalances() // update all balances for all connected addresses
onboard.state.actions.updateBalances(['0xfdadfadsadsadsadasdsa']) // update balance for one address
onboard.state.actions.updateBalances([
  '0xfdadfadsadsadsadasdsa',
  '0xfdsafdsfdsfdsfds'
]) // update balance for two addresses

setLocale Onboard will automatically detect the browser locale at runtime, but if you would like to update it manually you can call the setLocale function:

onboard.state.actions.setLocal('fr_FR')

updateNotify If you need to update your notify configuration after initialization, you can do that by calling the updateNotify function:

onboard.state.actions.updateNotify({
  desktop: {
    enabled: true,
    transactionHandler: transaction => {
      console.log({ transaction })
      if (transaction.eventCode === 'txPool') {
        return {
          type: 'success',
          message: 'Your transaction from #1 DApp is in the mempool'
        }
      }
    },
    position: 'bottomLeft'
  },
  mobile: {
    enabled: true,
    transactionHandler: transaction => {
      console.log({ transaction })
      if (transaction.eventCode === 'txPool') {
        return {
          type: 'success',
          message: 'Your transaction from #1 DApp is in the mempool'
        }
      }
    },
    position: 'topRight'
  }
})

customNotification Notify can be used to deliver custom DApp notifications by passing a CustomNotification object to the customNotification action. This will return an UpdateNotification type. This UpdateNotification will return an update function that can be passed a new CustomNotification to update the existing notification. The customNotification method also returns a dismiss method that is called without any parameters to dismiss the notification.

const { update, dismiss } = onboard.state.actions.customNotification({
  type: 'pending',
  message: 'This is a custom DApp pending notification to use however you want',
  autoDismiss: 0
})
setTimeout(
  () =>
    update({
      eventCode: 'dbUpdateSuccess',
      message: 'Updated status for custom notification',
      type: 'success',
      autoDismiss: 8000
    }),
  4000
)

preflightNotifications Notify can be used to deliver standard notifications along with preflight information by passing a PreflightNotificationsOptions object to the preflightNotifications action. This will return a a promise that resolves to the transaction hash (if sendTransaction resolves the transaction hash and is successful), the internal notification id (if no sendTransaction function is provided) or return nothing if an error occurs or sendTransaction is not provided or doesn't resolve to a string.

Preflight event types include

  • txRequest : Alert user there is a transaction request awaiting confirmation by their wallet
  • txAwaitingApproval : A previous transaction is awaiting confirmation
  • txConfirmReminder : Reminder to confirm a transaction to continue - configurable with the txApproveReminderTimeout property; defaults to 15 seconds
  • nsfFail : The user has insufficient funds for transaction (requires gasPrice, estimateGas, balance, txDetails.value)
  • txError : General transaction error (requires sendTransaction)
  • txSendFail : The user rejected the transaction (requires sendTransaction)
  • txUnderpriced : The gas price for the transaction is too low (requires sendTransaction)
interface PreflightNotificationsOptions {
  sendTransaction?: () => Promise<string | void>
  estimateGas?: () => Promise<string>
  gasPrice?: () => Promise<string>
  balance?: string | number
  txDetails?: {
    value: string | number
    to?: string
    from?: string
  }
  txApproveReminderTimeout?: number // defaults to 15 seconds if not specified
}
const balanceValue = Object.values(balance)[0]
const ethersProvider = new ethers.providers.Web3Provider(provider, 'any')

const signer = ethersProvider.getSigner()
const txDetails = {
  to: toAddress,
  value: 100000000000000
}

const sendTransaction = () => {
  return signer.sendTransaction(txDetails).then(tx => tx.hash)
}

const gasPrice = () => ethersProvider.getGasPrice().then(res => res.toString())

const estimateGas = () => {
  return ethersProvider.estimateGas(txDetails).then(res => res.toString())
}
const transactionHash = await onboard.state.actions.preflightNotifications({
  sendTransaction,
  gasPrice,
  estimateGas,
  balance: balanceValue,
  txDetails: txDetails
})
console.log(transactionHash)

updateAccountCenter If you need to update your Account Center configuration after initialization, you can call the updateAccountCenter function with the new configuration

onboard.state.actions.updateAccountCenter({
  position: 'topRight',
  enabled: true,
  minimal: true
})

setPrimaryWallet The primary wallet (first in the list of connected wallets) and primary account (first in the list of connected accounts for a wallet) can be set by using the setPrimaryWallet function. The wallet that is set needs to be passed in for the first parameter and if you would like to set the primary account, the address of that account also needs to be passed in:

// set the second wallet in the wallets array as the primary
onboard.state.actions.setPrimaryWallet(wallets[1])

// set the second wallet in the wallets array as the primary wallet
// as well as setting the third account in that wallet as the primary account
onboard.state.actions.setPrimaryWallet(
  wallets[1],
  wallets[1].accounts[2].address
)

Setting the User's Chain/Network

When initializing Onboard you define a list of chains/networks that your app supports. If you would like to prompt the user to switch to one of those chains, you can use the setChain method on an initialized instance of Onboard:

type SetChain = (options: SetChainOptions) => Promise<boolean>
type SetChainOptions = {
  chainId: string // hex encoded string
  chainNamespace?: 'evm' // defaults to 'evm' (currently the only valid value, but will add more in future updates)
  wallet?: string // the wallet.label of the wallet to set chain
}

const success = await onboard.setChain({ chainId: '0x89' })

The setChain methods takes an options object with a chainId property hex encoded string for the chain id to switch to. The chain id must be one of the chains that Onboard was initialized with. If the wallet supports programatically adding and switching the chain, then the user will be prompted to do so, if not, then a modal will be displayed indicating to the user that they need to switch chains to continue. The setChain method returns a promise that resolves when either the user has confirmed the chain switch, or has dismissed the modal and resolves with a boolean indicating if the switch network was successful or not. The setChain method will by default switch the first wallet (the most recently connected) in the wallets array. A specific wallet can be targeted by passing in the wallet.label in the options object as the wallet parameter.

Custom Styling

The Onboard styles can customized via CSS variables. The following properties and their default properties can be customized by adding these variables to the :root in your CSS file:

:root {
  /* CUSTOMIZE THE COLOR  PALLETTE */
  --onboard-white: white;
  --onboard-black: black;
  --onboard-primary-1: #2f80ed;
  --onboard-primary-100: #eff1fc;
  --onboard-primary-200: #d0d4f7;
  --onboard-primary-300: #b1b8f2;
  --onboard-primary-400: #929bed;
  --onboard-primary-500: #6370e5;
  --onboard-primary-600: #454ea0;
  --onboard-primary-700: #323873;
  --onboard-gray-100: #ebebed;
  --onboard-gray-200: #c2c4c9;
  --onboard-gray-300: #999ca5;
  --onboard-gray-400: #707481;
  --onboard-gray-500: #33394b;
  --onboard-gray-600: #242835;
  --onboard-gray-700: #1a1d26;
  --onboard-success-100: #d1fae3;
  --onboard-success-200: #baf7d5;
  --onboard-success-300: #a4f4c6;
  --onboard-success-400: #8df2b8;
  --onboard-success-500: #5aec99;
  --onboard-success-600: #18ce66;
  --onboard-success-700: #129b4d;
  --onboard-danger-100: #ffe5e6;
  --onboard-danger-200: #ffcccc;
  --onboard-danger-300: #ffb3b3;
  --onboard-danger-400: #ff8080;
  --onboard-danger-500: #ff4f4f;
  --onboard-danger-600: #cc0000;
  --onboard-danger-700: #660000;
  --onboard-warning-100: #ffefcc;
  --onboard-warning-200: #ffe7b3;
  --onboard-warning-300: #ffd780;
  --onboard-warning-400: #ffc74c;
  --onboard-warning-500: #ffaf00;
  --onboard-warning-600: #cc8c00;
  --onboard-warning-700: #664600;

  /* CUSTOMIZE ACCOUNT CENTER*/
  --account-center-z-index
  --account-center-position-top
  --account-center-position-bottom
  --account-center-position-right
  --account-center-position-left
  --account-center-minimized-background
  --account-center-maximized-upper-background
  --account-center-maximized-network-section
  --account-center-maximized-app-info-section
  --account-center-minimized-address-color
  --account-center-maximized-address-color
  --account-center-maximized-account-section-background-hover
  --account-center-maximized-action-background-hover
  --account-center-minimized-chain-select-background
  --account-center-network-selector-color
  --account-center-maximized-network-selector-color
  --account-center-minimized-network-selector-color
  --account-center-app-btn-text-color
  --account-center-app-btn-background
  --account-center-app-btn-font-family

  --account-center-border
  --account-center-box-shadow
  --account-center-border-radius
  --account-center-chain-warning
  --account-center-minimized-balance-color
  --account-center-minimized-chain-select-background

  --account-center-maximized-network-section-background
  --account-center-maximized-network-text-color
  --account-center-maximized-info-section-background-color
  --account-center-maximized-upper-action-color
  --account-center-maximized-upper-action-background-hover
  --account-center-maximized-app-name-color
  --account-center-maximized-app-info-color

  --account-center-micro-background

  /* CUSTOMIZE SECTIONS OF THE CONNECT MODAL */
  --onboard-connect-content-width
  --onboard-connect-content-height
  --onboard-wallet-columns
  --onboard-connect-sidebar-border-color
  --onboard-connect-sidebar-background
  --onboard-connect-sidebar-color
  --onboard-connect-sidebar-progress-background
  --onboard-connect-sidebar-progress-color
  --onboard-connect-header-background
  --onboard-connect-header-color
  --onboard-main-scroll-container-background
  --onboard-link-color
  --onboard-close-button-background
  --onboard-close-button-color
  --onboard-checkbox-background
  --onboard-checkbox-color
  --onboard-wallet-button-background
  --onboard-wallet-button-background-hover
  --onboard-wallet-button-color
  --onboard-wallet-button-color-hover
  --onboard-wallet-button-border-color
  --onboard-wallet-button-border-radius
  --onboard-wallet-button-box-shadow
  --onboard-wallet-button-box-shadow-hover
  --onboard-wallet-app-icon-border-color

  /* CUSTOMIZE THE SHARED MODAL */
  --onboard-modal-background
  --onboard-modal-color

  /* CUSTOMIZE THE CONNECT MODAL */
  --onboard-modal-border-radius
  --onboard-modal-backdrop
  --onboard-modal-box-shadow

  /* CUSTOMIZE THE ACTION REQUIRED MODAL */
  --onboard-action-required-modal-background
  --onboard-action-required-text-color
  --onboard-action-required-btn-text-color

  /* FONTS */
  --onboard-font-family-normal: Sofia Pro;
  --onboard-font-family-semibold: Sofia Pro Semibold;
  --onboard-font-family-light: Sofia Pro Light;

  --onboard-font-size-1: 3rem;
  --onboard-font-size-2: 2.25rem;
  --onboard-font-size-3: 1.5rem;
  --onboard-font-size-4: 1.25rem;
  --onboard-font-size-5: 1rem;
  --onboard-font-size-6: 0.875rem;
  --onboard-font-size-7: 0.75rem;

  /* SPACING */
  --onboard-spacing-1: 3rem;
  --onboard-spacing-2: 2rem;
  --onboard-spacing-3: 1.5rem;
  --onboard-spacing-4: 1rem;
  --onboard-spacing-5: 0.5rem;

  /* BORDER RADIUS */
  --onboard-border-radius-1: 24px;
  --onboard-border-radius-2: 20px;
  --onboard-border-radius-3: 16px;
  --onboard-border-radius-4: 12px;

  /* SHADOWS */
  --onboard-shadow-0: none;
  --onboard-shadow-1: 0px 4px 12px rgba(0, 0, 0, 0.1);
  --onboard-shadow-2: inset 0px -1px 0px rgba(0, 0, 0, 0.1);

  /* MAIN MODAL POSITIONING */
  --onboard-modal-z-index
  --onboard-modal-top
  --onboard-modal-bottom
  --onboard-modal-right
  --onboard-modal-left

  /* HD WALLET ACCOUNT SELECT MODAL POSITIONING */
  --onboard-account-select-modal-z-index
  --onboard-account-select-modal-top
  --onboard-account-select-modal-bottom
  --onboard-account-select-modal-right
  --onboard-account-select-modal-left

  /* MAGIC WALLET MODAL POSITIONING */
  --onboard-login-modal-z-index
  --onboard-login-modal-top
  --onboard-login-modal-bottom
  --onboard-login-modal-right
  --onboard-login-modal-left


  /* HARDWARE WALLET STYLES  */
  /* *if not set will fallback to variables with `--onboard` prefix shown above */

  /* COLORS */
  --account-select-modal-white: white;
  --account-select-modal-black: black;
  --account-select-modal-primary-100: #eff1fc;
  --account-select-modal-primary-200: #d0d4f7;
  --account-select-modal-primary-300: #b1b8f2;
  --account-select-modal-primary-500: #6370e5;
  --account-select-modal-primary-600: #454ea0;
  --account-select-modal-gray-100: #ebebed;
  --account-select-modal-gray-200: #c2c4c9;
  --account-select-modal-gray-300: #999ca5;
  --account-select-modal-gray-500: #33394b;
  --account-select-modal-gray-700: #1a1d26;
  --account-select-modal-danger-500: #ff4f4f;

  /* FONTS */
  --account-select-modal-font-family-normal: Sofia Pro;
  --account-select-modal-font-family-light: Sofia Pro Light;
  --account-select-modal-font-size-5: 1rem;
  --account-select-modal-font-size-7: .75rem;
  --account-select-modal-font-line-height-1: 24px;

  /* SPACING */
  --account-select-modal-margin-4: 1rem;
  --account-select-modal-margin-5: 0.5rem;

  /* NOTIFY STYLES */
  /* Notify Positioning variables only take effect if Notify is Positioned separate of Account Center */
  --notify-onboard-container-position-top
  --notify-onboard-container-position-bottom
  --notify-onboard-container-position-right
  --notify-onboard-container-position-left
  --notify-onboard-font-family-normal
  --notify-onboard-font-size-5
  --notify-onboard-gray-300
  --notify-onboard-gray-600
  --notify-onboard-border-radius
  --notify-onboard-font-size-7
  --notify-onboard-font-size-6
  --notify-onboard-line-height-4
  --notify-onboard-primary-100
  --notify-onboard-primary-400
  --notify-onboard-main-padding

  --notify-onboard-z-index
  --notify-onboard-background
  --notify-onboard-close-icon-color
  --notify-onboard-close-icon-hover
  --notify-onboard-transaction-status-color
  --notify-onboard-transaction-font-size
  --notify-onboard-hash-time-font-size
  --notify-onboard-hash-time-font-line-height
  --notify-onboard-address-hash-color
  --notify-onboard-anchor-color
}

Build Environments

Many of the wallet modules require dependencies that are not normally included in browser builds (namely the node builtin modules such as crypto, buffer, util etc). If you are having build issues you can try the following bundler configs to resolve these dependency issues:

Webpack 4

Everything should just work since the node built-ins are automatically bundled in v4

Webpack 5

You'll need to add some dev dependencies with the following command:

npm i --save-dev assert buffer crypto-browserify stream-http https-browserify os-browserify process stream-browserify util

Then add the following to your webpack.config.js file:

const webpack = require('webpack')

module.exports = {
  fallback: {
    path: require.resolve('path-browserify')
  },
  resolve: {
    alias: {
      assert: 'assert',
      buffer: 'buffer',
      crypto: 'crypto-browserify',
      http: 'stream-http',
      https: 'https-browserify',
      os: 'os-browserify/browser',
      process: 'process/browser',
      stream: 'stream-browserify',
      util: 'util'
    }
  },
  experiments: {
    asyncWebAssembly: true
  },
  plugins: [
    new webpack.ProvidePlugin({
      process: 'process/browser',
      Buffer: ['buffer', 'Buffer']
    })
  ]
}

If using create-react-app

CRACO provides a way to override webpack config which is obfuscated in Create React App built applications.

The above webpack 5 example can be used in the craco.config.js file at the root level in this case.

React App Rewired is another option for working with Create React App DApps

Add the following dev dependencies:

yarn add rollup-plugin-polyfill-node webpack-bundle-analyzer -D

const webpack = require('webpack')
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer')
const path = require('path')

module.exports = function override(config) {
  const fallback = config.resolve.fallback || {}
  Object.assign(fallback, {
    assert: require.resolve('assert'),
    buffer: require.resolve('buffer'),
    crypto: require.resolve('crypto-browserify'),
    http: require.resolve('stream-http'),
    https: require.resolve('https-browserify'),
    os: require.resolve('os-browserify/browser'),
    path: require.resolve('path-browserify'),
    process: require.resolve('process/browser'),
    stream: require.resolve('stream-browserify'),
    url: require.resolve('url'),
    util: require.resolve('util')
  })
  config.resolve.fallback = fallback
  config.resolve.alias = {
    ...config.resolve.alias,
    'bn.js': path.resolve(__dirname, 'node_modules/bn.js'),
    lodash: path.resolve(__dirname, 'node_modules/lodash'),
    'magic-sdk': path.resolve(
      __dirname,
      'node_modules/magic-sdk/dist/cjs/index.js'
    )
  }
  config.plugins = (config.plugins || []).concat([
    new webpack.ProvidePlugin({
      process: 'process/browser',
      Buffer: ['buffer', 'Buffer']
    }),
    new webpack.IgnorePlugin({
      resourceRegExp: /genesisStates\/[a-z]*\.json$/,
      contextRegExp: /@ethereumjs\/common/
    }),
    new BundleAnalyzerPlugin({
      analyzerMode: 'disabled'
    })
  ])
  config.ignoreWarnings = [/Failed to parse source map/]
  config.module.rules.push({
    test: /\.(js|mjs|jsx)$/,
    enforce: 'pre',
    loader: require.resolve('source-map-loader'),
    resolve: {
      fullySpecified: false
    }
  })
  return config
}

SvelteKit

Add the following dev dependencies:

npm i --save-dev rollup-plugin-polyfill-node

Then add the following to your svelte.config.js file:

import adapter from '@sveltejs/adapter-auto'
import preprocess from 'svelte-preprocess'
import nodePolyfills from 'rollup-plugin-polyfill-node'

const MODE = process.env.NODE_ENV
const development = MODE === 'development'

/** @type {import('@sveltejs/kit').Config} */
const config = {
  preprocess: preprocess(),
  kit: {
    adapter: adapter(),
    vite: {
      plugins: [
        development &&
          nodePolyfills({
            include: [
              'node_modules/**/*.js',
              new RegExp('node_modules/.vite/.*js')
            ],
            http: true,
            crypto: true
          })
      ],
      resolve: {
        alias: {
          crypto: 'crypto-browserify',
          stream: 'stream-browserify',
          assert: 'assert'
        }
      },
      build: {
        rollupOptions: {
          external: ['@web3-onboard/*'],
          plugins: [nodePolyfills({ crypto: true, http: true })]
        },
        commonjsOptions: {
          transformMixedEsModules: true
        }
      },
      optimizeDeps: {
        exclude: ['@ethersproject/hash', 'wrtc', 'http'],
        include: [
          '@web3-onboard/core',
          '@web3-onboard/gas',
          '@web3-onboard/sequence',
          'js-sha3',
          '@ethersproject/bignumber'
        ]
      }
    }
  }
}

export default config

Vite

Add the following dev dependencies:

npm i --save-dev rollup-plugin-polyfill-node

Then add the following to your vite.config.js file:

import nodePolyfills from 'rollup-plugin-polyfill-node'

const MODE = process.env.NODE_ENV
const development = MODE === 'development'

export default {
  // other config options
  plugins: [
    development &&
      nodePolyfills({
        include: [
          'node_modules/**/*.js',
          new RegExp('node_modules/.vite/.*js')
        ],
        http: true,
        crypto: true
      })
  ],
  resolve: {
    alias: {
      crypto: 'crypto-browserify',
      stream: 'stream-browserify',
      assert: 'assert'
    }
  },
  build: {
    rollupOptions: {
      plugins: [nodePolyfills({ crypto: true, http: true })]
    },
    commonjsOptions: {
      transformMixedEsModules: true
    }
  }
}

Nuxt.js

Add the following to your nuxt.config.js:

build: {
  standalone: true,
}