Function submit_transaction 

pub async fn submit_transaction<Call>(
    quantus_client: &QuantusClient,
    from_keypair: &QuantumKeyPair,
    call: Call,
    tip: Option<u128>,
    execution_mode: ExecutionMode,
) -> Result<H256>
where
    Call: Payload,

Submit transaction with optional finalization check

By default (finalized=false), waits until transaction is in the best block (fast) With finalized=true, waits until transaction is in a finalized block (slow in PoW chains) With wait_for_transaction=false, returns immediately after submission without waiting