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  • Introduction
  • GETTING STARTED
    • SDK Quick Start
    • API Quick Start
  • Guides
    • Web
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Web authentication methods
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Configure a custom subdomain
      • Eject a wallet
      • Using the EIP-1193 Provider
      • Legacy documentation
        • Back up a wallet
          • Backup Options
        • Recover a wallet
    • iOS
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Connect with WalletConnect
      • Build a WebView
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Manage ERC20 tokens
      • Eject a wallet
      • Legacy documentation
        • Back up a wallet
          • Backup Options
          • Passkey + Enclave Storage
        • Recover a wallet
      • Troubleshooting Tips
      • Feature Flags
    • Android
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Connect with WalletConnect
      • Build a WebView
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Eject a wallet
      • Legacy documentation
        • Back up a wallet
          • Backup Options
        • Recover a wallet
    • React Native
      • Create a wallet
      • Send tokens
      • Sign a transaction
      • Simulate a transaction
      • Back up a wallet
      • Recover a wallet
      • Cross-device sessions
      • Manage wallet lifecycle states
      • Connect with WalletConnect
      • Build a WebView
      • Perform swaps
      • Add custom signature hooks
      • MPC progress callbacks
      • Portal API methods
      • Eject a wallet
      • Legacy documentation
        • Back up a wallet
          • Backup Options
        • Recover a wallet
    • Enclave MPC API
      • Create a client
      • Create a wallet
      • Send tokens
      • Sign Ethereum transactions
      • Sign Solana transactions
      • Sign Tron transactions
      • Sign Stellar Transaction
      • Concurrent Transactions
      • Back up a wallet
      • Eject a wallet
  • Reference
    • iOS
      • createWallet
      • backupWallet
      • recoverWallet
      • ejectPrivateKeys
      • registerBackupMethod
      • setGDriveConfiguration
      • setPasskeyConfiguration
      • setPasskeyAuthenticationAnchor
      • setPassword
      • availableRecoveryMethods
      • doesWalletExist
      • isWalletBackedUp
      • isWalletOnDevice
      • isWalletRecoverable
      • getBalances
      • getAssets
      • getNftAssets
      • getTransactions
      • sendSol
      • evaluateTransaction
      • buildEip155Transaction
      • buildSolanaTransaction
      • getWalletCapabilities
    • Android
      • Reference Documentation
    • React Native
      • @portal-hq/core
      • Storage adapters
        • Cloud storage
          • @portal-hq/gdrive-storage
          • @portal-hq/icloud-storage
        • Mobile storage
          • @portal-hq/keychain
          • @portal-hq/mobile-key-values
    • Enclave MPC API
      • V1 endpoints
    • Client API
      • V3 endpoints
      • V1 endpoints
    • Custodian API
      • V3 endpoints
      • V1 endpoints
    • Swaps API
      • V3 endpoints
      • V1 endpoints
  • Resources
    • Flutter
      • iOS
      • Android
    • Error codes
      • Overview
      • MPC errors
      • Network errors
      • General errors
      • Encryption errors
      • Portal Connect errors
    • Portal's MPC architecture
    • Authentication and API Keys
    • Self-Managed Backups
    • Alert Webhooks
    • Wallet lifecycle
    • Backup options
      • Password/PIN
      • GDrive
      • iCloud
      • Passkey + Enclave
    • WalletConnect metadata
    • Advanced security scanning
    • Account abstraction
    • Security firewall
    • Eject
    • Security
    • Blockchain support
    • Chain ID formatting
    • Testnet faucets
    • Going to Production
    • Rate Limits
    • Multi-backup migration guide
    • Multi-wallet migration guides
      • Migrating from Android SDK v3.x.x to v4.x.x
      • Migrating from iOS SDK v3.0.x to v3.2.x
  • Support
    • Changelog
      • Android
      • iOS
      • React Native
      • Web
      • Past Releases
        • 2024 Releases
        • 2023 Releases
    • Celo Hackathon Hub
    • Glossary
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On this page
  • The onReady hook
  • Wallet Creation

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  1. Guides
  2. Web

Create a wallet

The first step to the MPC process is generating key shares, or a wallet, for your users.

Once you have an instance of Portal, you can add logic to create web3 wallets.

The onReady hook

The Portal class dynamically loads a number of resources behind the scenes to enable MPC directly in the browser. For this reason, some functionality is not immediately available after initialization.

We have include an onReady function to enable you to write your application logic in a more linear manner without having to explicitly poll the ready state of your Portal instance.

portal.onReady(() => {
    // Your code
})

Wallet Creation

The createWallet function initiates the MPC process to create a set of shares. The user's share and the wallet address is automatically stored in the browser's local storage, but hidden from the main browser context of your web application.

portal.onReady(async () => {
    const walletExists = await portal.doesWalletExist()

    if (!walletExists) {
        await portal.createWallet()
    }
    
    const ethAddress = await portal.getEip155Address()
    const solAddress = await portal.getSolanaAddress()
})

That's it! You now have an MPC Wallet built into your web application.

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Last updated 12 months ago

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Be sure to use a Production API key when creating clients for production. Read more details about going to production .

here