a minimal, non-upgradeable implementation contract that can be set on an EIP-7702 delegation txn
- ERC-4337: Gas sponsorship and userOp handling through a 4337 interface.
- ERC-7821: Generic transaction batching through an ERC-7821 interface.
- ERC-7201: Name spaced storage to prevent collisions.
- Key Management + Authorization Adding & revoking keys that have access to perform operations as specified by the account owner.
- Non-Upgradeability: Upgradability is only allowed through re-delegation rather than a proxy.
- Singleton: One canonical contract is delegated to.