96 lines
3.4 KiB
Rust
96 lines
3.4 KiB
Rust
// Copyright 2019-2021 Parity Technologies (UK) Ltd.
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//
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// Permission is hereby granted, free of charge, to any
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// person obtaining a copy of this software and associated
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// documentation files (the "Software"), to deal in the
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// Software without restriction, including without
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// limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice
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// shall be included in all copies or substantial portions
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// of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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use std::net::SocketAddr;
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use jsonrpsee::core::async_trait;
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use jsonrpsee::proc_macros::rpc;
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use jsonrpsee::server::Server;
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use jsonrpsee::types::ErrorObjectOwned;
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use jsonrpsee::ws_client::WsClientBuilder;
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type ExampleHash = [u8; 32];
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pub trait Config {
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type Hash: Send + Sync + 'static;
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}
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impl Config for ExampleHash {
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type Hash = Self;
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}
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/// The RPC macro requires `DeserializeOwned` for output types for the client implementation, while the
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/// server implementation requires output types to be bounded by `Serialize`.
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///
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/// In this example, we don't want the `Conf` to be bounded by default to
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/// `Conf : Send + Sync + 'static + jsonrpsee::core::DeserializeOwned` for client implementation and
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/// `Conf : Send + Sync + 'static + jsonrpsee::core::Serialize` for server implementation.
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///
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/// Explicitly, specify client and server bounds to handle the `Serialize` and `DeserializeOwned` cases
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/// just for the `Conf::hash` part.
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#[rpc(server, client, namespace = "foo", client_bounds(T::Hash: jsonrpsee::core::DeserializeOwned), server_bounds(T::Hash: jsonrpsee::core::Serialize + Clone))]
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pub trait Rpc<T: Config> {
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#[method(name = "bar")]
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fn method(&self) -> Result<T::Hash, ErrorObjectOwned>;
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}
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pub struct RpcServerImpl;
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#[async_trait]
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impl RpcServer<ExampleHash> for RpcServerImpl {
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fn method(&self) -> Result<<ExampleHash as Config>::Hash, ErrorObjectOwned> {
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Ok([0u8; 32])
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}
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}
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#[tokio::main]
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async fn main() -> anyhow::Result<()> {
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tracing_subscriber::FmtSubscriber::builder()
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.with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
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.try_init()
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.expect("setting default subscriber failed");
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let server_addr = run_server().await?;
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let url = format!("ws://{}", server_addr);
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let client = WsClientBuilder::default().build(&url).await?;
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assert_eq!(RpcClient::<ExampleHash>::method(&client).await.unwrap(), [0u8; 32]);
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Ok(())
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}
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async fn run_server() -> anyhow::Result<SocketAddr> {
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let server = Server::builder().build("127.0.0.1:0").await?;
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let addr = server.local_addr()?;
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let handle = server.start(RpcServerImpl.into_rpc());
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// In this example we don't care about doing shutdown so let's it run forever.
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// You may use the `ServerHandle` to shut it down or manage it yourself.
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tokio::spawn(handle.stopped());
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Ok(addr)
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}
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