By the end of this guide, you'll know what smart wallets and session keys are, how they enhance the user experience, and how to implement them in your api for blockchain web3 applications using the third Webb.
What are Smart Wallets and Session Keys?
Smart wallet
A smart wallet is a smart contract wallet that uses account abstraction.
They can use tellers to pay users for gas, enabling features such as no gas transactions.
This eliminates the need for users to hold and use gas when interacting with the application.
Session key
Session keys api for blockchain allows you to set the permissions of your wallet or key to sign transactions on behalf of your smart wallet.
Users do not have to confirm and sign each transaction, they can authorize another wallet or key to complete it for them.
This is especially useful for applications with frequent transactions because it eliminates the need for users to manually confirm each transaction.
It also unlocks the ability for us to process automated or timed transactions without requiring the user to be present to sign with their wallet.
Seamless api for blockchain Web3 user experience with smart wallet and engine
With thirdweb, we can use Engine to leverage smart wallets and session keys.
In the picture above, we have our front end, where our users will connect to their smart wallet, and our back end will be the engine as well as our back and wallet.
We can then set session key permissions for the back-end wallet so that when we call the Engine, it can use that back-end wallet to sign the transaction.
This will result in our users not having to sign transactions on the front end.
Step 1: Set the project
First, let's set up a new Next.js project and install the necessary dependencies.
Create a new project using one of the following startup templates:
Px third web api for blockchain creates the application
Edit the file named.env in the root directory of the project and add a third Web API key.
Now that we've set up the project using thirdwebSDK, let's add a Connect Wallet button in the app, which will allow us to use smart wallets for account abstraction.
Step 2: Implement a smart wallet
To add a connected wallet button, we can use a pre-built UI component in the  third web called the connbuttontonn
Add the ConnecButton UI component to your application and provide it to your clients from the client.ts file
Import {ConnectWallet} from "@thirdweb-dev/react";
Import {client} from./client;
Export the default function Home () {
Back (
<div>
< Connect wallet
Client = {client}
/>
</div>
);
}
Next, we need to implement account abstraction and smart wallets.
We need to specify which api for blockchain we are using and whether we want to sponsor the gas with the payments director.
Import {ConnectWallet} from "@thirdweb-dev/react";
Import {client} from./client;
Export the default function Home () {
Back (
<div>
< Connect wallet
Client = {client}
Accounting summary ={{
chain: <chain>,
Sponsor Gas: Correct
}}
/>
</div>
);
}