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Introducing Cross Device Syncing
Create multiple signing shares across devices.
December 5, 2023
Portal is excited to introduce cross-device syncing, a secure way to allow your users to sign transactions for the same wallet across multiple devices.
With traditional non-custodial wallets, a user gets a single pair of public and private keys to both sign and recover their wallet. With MPC wallets, like those offered by Portal, two pairs of key shares are generated upon wallet creation, signing keys and recovery keys. The signing shares are used to sign and execute transactions, while the recovery keys are used to recover the wallet if the device storing the signing key is lost. With cross-device syncing, businesses can create additional signing shares on secondary devices from the original used to create the wallet.
Why use cross-device syncing?
Cross-device syncing is the ability for a business to support multiple sessions across different devices for a user. Therefore, users can access a single wallet across multiple devices, such as smartphones, tablets and computers, and sign transactions from any one of them.
Many users want to access their wallet across different types of devices without having to transfer assets or keys manually. Cross-device syncing offers users the convenience of seamlessly managing their assets and interacting with Web3 applications across devices.
How developers implement cross-device syncing
The additional signing shares can be created once a user has successfully backed up their wallet. Thanks to portal.provisionWallet, both the new and old sets of signing shares can be used simultaneously.
Here's how to implement portal.provisionWallet:
Contact us for a demo
Interested in seeing how the Portal SDK works and learning more about the benefits of cross-device syncing? Contact us to set up a time to talk.