Once your user’s have session signers on their wallets, your app can take actions on their behalf. This is done by sending requests to the Privy API to sign transactions with the user’s wallet. Follow the guide below to get started with signing transactions on behalf of users.

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Requesting signatures

Wallets provisioned for session signers can be used to transact and sign messages on behalf of a user from your server. To get started, configure the NodeJS SDK or the REST API. This is how your application will make requests to the Privy API to sign transactions on behalf of users. The signing key you configured in the dashboard is the authorization signing key used to produce authorization signatures when submitting requests. Once you have configured the NodeJS SDK or REST API, your application can send or sign transactions from a users wallet. Follow the NodeJS or REST API guides in the Using wallets section to learn more about signing requests with wallets.

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Getting wallets

From your server, you can query Privy to determine what wallets have been provisioned session signers by a given user to allow your app to take actions on their behalf.
Use the Privy client’s getUser method to get the user object for your user. As a parameter to this method, pass the user’s DID as a string:
const user = await client.getUser({identityToken});
To get a list of the user’s wallets with session signers, first find all of the user’s embedded wallets from the user’s linked accounts. Filter the user.linkedAccounts array for wallet entries with type: 'wallet' and delegated: true:
// The `WalletWithMetadata` type can be imported from '@privy-io/server-auth'
const walletsWithSessionSigners = user.linkedAccounts.filter(
  (account): account is WalletWithMetadata =>
    account.type === 'wallet' && account.delegated === true
);
This constitutes the user’s wallets with session signers. Wallets with session signers will always have the delegated flag set to true.For wallets included in this array, your app may make requests to Privy to execute actions on behalf of the user.