Function baru::swap::bob_create_transaction

pub async fn bob_create_transaction<R, C, S, F>(
    rng: &mut R, 
    secp: &Secp256k1<C>, 
    alice: Actor, 
    bob: Actor, 
    fee_asset: AssetId, 
    fee_sats_per_vbyte: Amount, 
    bob_signer: S
) -> Result<Transaction> where
    R: RngCore + CryptoRng,
    C: Signing,
    S: FnOnce(Transaction) -> F,
    F: Future<Output = Result<Transaction>>,