DelegationSponsorEIP7702 - Anyone can sponsor gas for their users, as authorized by EIP-7702.
Design:
Features:
- ✅: Use normal Public RPC (no API required).
- ✅: Use nonce to verify transaction sequence instead (Sponsor must send auth transaction first every time).
- ✅: SignMessage by user to verify before transaction.
- ✅: Signature will be signature from signMessage to verify again.
- ✅: Prevent Replay attack (EOA not allowed).
- ✅: Support single transaction and group transaction.
- ✅: Anyone can use this Delegate CA as Sponsor gas by themselves.
- ❌: Authorization(spec) still requires pk to access account to sign.