Extended Reading： https://vitalik.ca/general/2021/01/11/recovery.html How to start with ERC-4337 Very curious about ERC-4337, so after some research, I finally got it:It is everything about using smart contract accounts over EOAs (Externally Owned Accounts), implementing account abstraction (#ERC4337).The first draft about this topic was proposed on 2021-09-29 by Vitalik Buterin in "ERC-4337: Account Abstraction Using Alt Mempool"Now we have an "official" EntryPoint Smart Contract deployed by...