Sponsoring user operations using AA-SDK and Gas Manager
This repository serves as the codebase for Alchemy's tutorial on sponsoring userops tutorial. This tutorial walks you through the process of using Alchemy AA-SDK and Gas Manager to execute sponsored userops (such as sending ETH).
Prerequisites
You will need the latest recommended Node version v18.16.1 to use this repository.
To check which version you have, run the following in your preferred terminal:
node -v
If v18.16.1 appears, you are ready to use the repository! If it does not, the best way to install and change your node versions is through Node Version Manager
Click the above link to install nvm if you do not already have it. Then run the following command.
nvm install 18.16.1
node -v
In your terminal, you should now see
Now using node v18.16.1 (npm v9.5.1)
v18.16.1
Setup and running the scripts
Clone the repository and install the dependencies:
git clone https://github.com/alchemyplatform/sponsoring-userops.git
cd sponsoring-userops
npm install
Then create your .env file based on .env.example.
Once you have created and populated your .env, run the following command:
npm run index
The command executes a sponsored user operation to send ETH from your SCA to the specified wallet adddress in index.ts.
Explaining the Scripts
Let's briefly review the files within the src folder.
createSigner.ts
- Creates a signer for your smart contract account ( existing or new account ) coupled with Alchemy's Gas Manager that can be used to send sponsored user operations ( i.e. their gas is paid by Alchemy's Gas Manager ).
index.ts
- Sends a sponsored user operation that sends ETH from your SCA to the specified wallet adddress in index.ts.