use {
    rayon::iter::{IntoParallelIterator, ParallelIterator},
    solana_sdk::{transaction::VersionedTransaction, transport::Result as TransportResult},
    std::net::{SocketAddr, UdpSocket},
};

pub trait TpuConnection {
    fn new(client_socket: UdpSocket, tpu_addr: SocketAddr) -> Self;

    fn tpu_addr(&self) -> &SocketAddr;

    fn serialize_and_send_transaction(
        &self,
        transaction: &VersionedTransaction,
    ) -> TransportResult<()> {
        let wire_transaction =
            bincode::serialize(transaction).expect("serialize Transaction in send_batch");
        self.send_wire_transaction(&wire_transaction)
    }

    fn send_wire_transaction<T>(&self, wire_transaction: T) -> TransportResult<()>
    where
        T: AsRef<[u8]>;

    fn par_serialize_and_send_transaction_batch(
        &self,
        transactions: &[VersionedTransaction],
    ) -> TransportResult<()> {
        let buffers = transactions
            .into_par_iter()
            .map(|tx| bincode::serialize(&tx).expect("serialize Transaction in send_batch"))
            .collect::<Vec<_>>();

        self.send_wire_transaction_batch(&buffers)
    }

    fn send_wire_transaction_batch<T>(&self, buffers: &[T]) -> TransportResult<()>
    where
        T: AsRef<[u8]>;
}