Function sign_sponsored_transaction 

pub fn sign_sponsored_transaction<S, F>(
    fee_payer_txn: &FeePayerRawTransaction,
    sender: &S,
    secondary_signers: &[&dyn Account],
    fee_payer: &F,
) -> AptosResult<SignedTransaction>
where
    S: Account,
    F: Account,

Signs a sponsored (fee payer) transaction with all required signatures.

Arguments

• fee_payer_txn - The unsigned fee payer transaction
• sender - The sender account
• secondary_signers - Additional signers (if any)
• fee_payer - The account paying gas fees

Example

use aptos_sdk::transaction::sign_sponsored_transaction;

let signed_txn = sign_sponsored_transaction(
    &fee_payer_txn,
    &sender_account,
    &[],  // No secondary signers
    &fee_payer_account,
)?;

Errors

Returns an error if generating the signing message fails or if any signer fails to sign.