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title: 2. for a specific transaction, sponsor initialized note: ``` pub struct TransactionData { pub kind: TransactionKind, sender: SuiAddress, gas_payment: ObjectRef, pub gas_price: u64, pub gas_budget: u64, } ``` Sponsor -> Sponsor: somehow sponsors has a tx that it thinks the user may be interested. Sponsor -> User: fully constructed TransactionData and sponsor sig User -> User: check tx, sign TransactionData User -> FullNode: submit dual signed transaction