Function cast_send_with_tempo_wallet_via_sponsor 

pub(crate) async fn cast_send_with_tempo_wallet_via_sponsor<N: Network, P: Provider<N>>(
    provider: &P,
    tx: N::TransactionRequest,
    wallet: &TempoAccountsWallet,
    sponsor_url: &str,
    cast_async: bool,
    sync: bool,
    confirmations: u64,
    timeout: u64,
) -> Result<B256>
where
    N::TransactionRequest: Default + FoundryTransactionBuilder<N>,
    N::ReceiptResponse: UIfmt + UIfmtReceiptExt,

Signs a prepared transaction with a Tempo wallet, obtains a remote fee-payer signature, and broadcasts the sponsored transaction through the original provider transport.