Allowlist Paymaster using ThirdWeb SDK

This is the implementation of Allowlist Paymaster, a paymaster that allows a list of UserOperation senders to be sponsored by the paymaster

Installation

Clone the repo

git clone https://github.com/celo-academy/erc-4337-custom-paymaster.git

Install dependencies

yarn install

Create a .env file and copy the contents of .env.example into it
Get the Private Key of the owner of the Paymaster and place it in the .env file
Open the file scripts/deploy.js, Entrypoint are frequently upgraded make sure the variable ENTRYPOINT_ADDRESS has the correct value
Run the deploy script to deploy the paymaster using the following command

npx hardhat run scripts/deploy.js --network alfajores

Copy the paymaster address that you get in the terminal, this is the value for ALLOWLIST_PAYMASTER_ADDRESS
Get THIRDWEB_API_KEY from the ThirdWeb Dashboard
Place the key in .env file
Replace variables PAYMASTER_OWNER (this is the public key corresponding the private key of the paymaster owner), and ALLOWLIST_PAYMASTER_ADDRESS with the values you have

To run the transaction script and perform a UserOperation use the following command

yarn dev

Optional:

You can verify the paymaster by using your Celoscan key in .env file and use the following command

npx hardhat verify [PAYMASTER_ADDRESS] [ENTRYPOINT_ADDRESS] [PAYMASTER_OWNER_ADDRESS] --network alfajores

Customize the allowList in index.js to allow sponsorship of smart accounts by the paymaster

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