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use std::task::{Context, Poll};
use futures::future::{self, Ready};
use tower::Service;
use tracing_futures::{Instrument, Instrumented};
use xaynet_core::common::RoundParameters;
use crate::state_machine::events::{EventListener, EventSubscriber};
#[derive(Default, Clone, Eq, PartialEq, Debug)]
pub struct RoundParamsRequest;
pub type RoundParamsResponse = RoundParameters;
pub struct RoundParamsService(EventListener<RoundParameters>);
impl RoundParamsService {
pub fn new(events: &EventSubscriber) -> Self {
Self(events.params_listener())
}
}
impl Service<RoundParamsRequest> for RoundParamsService {
type Response = RoundParameters;
type Error = ::std::convert::Infallible;
type Future = Instrumented<Ready<Result<Self::Response, Self::Error>>>;
fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, _req: RoundParamsRequest) -> Self::Future {
future::ready(Ok(self.0.get_latest().event))
.instrument(error_span!("round_params_fetch_request"))
}
}