61 lines
1.9 KiB
Rust
61 lines
1.9 KiB
Rust
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use std::{
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future::Future,
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pin::Pin,
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task::{Context, Poll},
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};
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use tower::{buffer::Buffer, util::BoxService, Service};
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use zebra_chain::parameters::Network;
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use crate::{BoxError, Config, MemoryState, Request, Response, SledState};
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struct StateService {
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/// Holds data relating to finalized chain state.
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sled: SledState,
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/// Holds data relating to non-finalized chain state.
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mem: MemoryState,
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}
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impl StateService {
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pub fn new(config: Config, network: Network) -> Self {
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let sled = SledState::new(&config, network);
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let mem = MemoryState {};
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Self { sled, mem }
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}
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}
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impl Service<Request> for StateService {
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type Response = Response;
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type Error = BoxError;
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type Future =
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Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send + 'static>>;
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fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, req: Request) -> Self::Future {
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match req {
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Request::AddBlock { block } => unimplemented!(),
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Request::GetBlock { hash } => unimplemented!(),
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Request::GetTip => unimplemented!(),
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Request::GetDepth { hash } => unimplemented!(),
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Request::GetBlockLocator { genesis } => unimplemented!(),
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}
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}
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}
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/// Initialize a state service from the provided `config`.
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///
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/// Each `network` has its own separate sled database.
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///
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/// The resulting service is clonable, to provide shared access to a common chain
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/// state. It's possible to construct multiple state services in the same
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/// application (as long as they, e.g., use different storage locations), but
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/// doing so is probably not what you want.
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pub fn init(
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config: Config,
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network: Network,
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) -> Buffer<BoxService<Request, Response, BoxError>, Request> {
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Buffer::new(BoxService::new(StateService::new(config, network)), 1)
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}
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