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Title: 1. User Proposed Transaction note: ``` pub struct TransactionDataNoGas [escape-left-curley-bracket] pub kind: TransactionKind, pub sender: SuiAddress, pub expiration: TransactionExpiration, } ``` User -> Sponsor: gas request with ** TransactionDataNoGas ** Sponsor -> Sponsor: check transaction, select Gas, construct `TransactionData` with the Gas, and sign `TransactionData` Sponsor -> User: `TransactionData` and sponsor signature User -> User: Examine Gas and Sponsor sigature, sign `TransactionData` User -> FullNode: submit dual signed transaction (could be sent via the Sponsor)