Function 4 of #ERC-4337 : Pre-approval of transactions
One use case for ERC-4337 is:
The ability to pre-approve transaction approvals for specific time periods and/or specific Dapps.
For example: when a user plays a blockchain game on L 2, the user does not need to go through the signature process every time he buys/sells something, but has an automatic and seamless transaction experience based on pre-approval.
This will increase the smooth experience of Dapp and make it more user-friendly.
