October 12th, 2023

Simplified Smart Wallet Session Key API

Joaquim Verges

You can now easily create session keys for your smart wallets, granting scoped access to other wallets.

This is useful in a handful of setups where you need to give restricted or temporary smart wallet access to a backend or another user.

Restrictions include:

Which contracts can be called
How much ETH can be spent
start and expiration time

Here's what it looks like in Typescript:


const smartWallet = new SmartWallet(config);
 
// create and add a session key with permissions
await smartWallet.createSessionKey(
    "0x...", // the session key address
    {
        approvedCallTargets: ["0x..."], // the addresses of contracts that the session key can call
        nativeTokenLimitPerTransaction: 0.1, // the maximum amount of native token (in ETH) that the session key can spend per transaction
        startDate: new Date(), // the date when the session key becomes active
        expirationDate = new Date(Date.now() + 24 * 60 * 60 * 1000); // the date when the session key expires
    }
);

And in React:


const {
  mutate: createSessionKey,
  isLoading,
  error,
} = useCreateSessionKey();