sponsored Transaction
open suspend override fun sponsoredTransaction(ptb: ProgrammableTransaction, sender: AccountAddress, expiration: TransactionExpiration): Result<GasLessTransactionData, <Error class: unknown class>>
open suspend override fun sponsoredTransaction(ptb: ProgrammableTransaction, sender: String, expiration: TransactionExpiration): Result<GasLessTransactionData, <Error class: unknown class>>