tendermint-proto: grpc server definitions for rpc/abci (#1338)

* proto-compiler: use `tonic_build@0.9`

Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>
Co-authored-by: Tony Arcieri <tony@iqlusion.io>

* proto-compiler: generate bindings for ABCI/RPC service definitions

Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>
Co-authored-by: Tony Arcieri <tony@iqlusion.io>

* tendermint-proto: update bindings for `v0_34`, `v0_37`, `v0_38`

Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>
Co-authored-by: Tony Arcieri <tony@iqlusion.io>

* tendermint-proto: gate tonic import on `grpc` feature

Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>
Co-authored-by: Tony Arcieri <tony@iqlusion.io>

* proto: allow `std` when `grpc-*` feature is enabled

* changelog: add an entry for #1338

* proto: use `tonic@0.8`

* tendermint-proto: regenerate bindings with `tonic_build@0.8`

* cargo: bump to `tonic@0.9`

* Re-generate proto files

* proto: Add grpc-server attribute on the grpc API

---------

Co-authored-by: Tomas Tauber <2410580+tomtau@users.noreply.github.com>
Co-authored-by: Tony Arcieri <tony@iqlusion.io>
Co-authored-by: Mikhail Zabaluev <mikhail@informal.systems>

.changelog/unreleased/features/1338-grpc-server-rpc-abci.md

@@ -0,0 +1,2 @@
+- `[tendermint-proto]` add `grpc`/`grpc-server` features to include gRPC server definitions for the RPC/ABCI services.
+([#1338](https://github.com/informalsystems/tendermint-rs/issues/1338))

proto/Cargo.toml

@@ -13,6 +13,11 @@ description = """
     tendermint-proto is a the Rust implementation of the Tendermint proto structs.
     """
 
+[features]
+default = []
+grpc = ["grpc-server"]
+grpc-server = ["tonic"]
+
 [package.metadata.docs.rs]
 all-features = true
 
@@ -27,6 +32,7 @@ num-traits = { version = "0.2", default-features = false }
 num-derive = { version = "0.3", default-features = false }
 time = { version = "0.3", default-features = false, features = ["macros", "parsing"] }
 flex-error = { version = "0.4.4", default-features = false }
+tonic = { version = "0.9", optional = true }
 
 [dev-dependencies]
 serde_json = { version = "1.0", default-features = false, features = ["alloc"] }

proto/src/lib.rs

@@ -1,6 +1,6 @@
 //! tendermint-proto library gives the developer access to the Tendermint proto-defined structs.
 
-#![no_std]
+#![cfg_attr(not(any(feature = "grpc-server", feature = "grpc-client")), no_std)]
 #![deny(warnings, trivial_casts, trivial_numeric_casts, unused_import_braces)]
 #![allow(clippy::large_enum_variant)]
 #![forbid(unsafe_code)]

proto/src/prost/v0_34/tendermint.rpc.grpc.rs

@@ -18,3 +18,231 @@ pub struct ResponseBroadcastTx {
     #[prost(message, optional, tag = "2")]
     pub deliver_tx: ::core::option::Option<super::super::abci::ResponseDeliverTx>,
 }
+/// Generated server implementations.
+#[cfg(feature = "grpc-server")]
+pub mod broadcast_api_server {
+    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
+    use tonic::codegen::*;
+    /// Generated trait containing gRPC methods that should be implemented for use with BroadcastApiServer.
+    #[async_trait]
+    pub trait BroadcastApi: Send + Sync + 'static {
+        async fn ping(
+            &self,
+            request: tonic::Request<super::RequestPing>,
+        ) -> std::result::Result<tonic::Response<super::ResponsePing>, tonic::Status>;
+        async fn broadcast_tx(
+            &self,
+            request: tonic::Request<super::RequestBroadcastTx>,
+        ) -> std::result::Result<
+            tonic::Response<super::ResponseBroadcastTx>,
+            tonic::Status,
+        >;
+    }
+    #[derive(Debug)]
+    pub struct BroadcastApiServer<T: BroadcastApi> {
+        inner: _Inner<T>,
+        accept_compression_encodings: EnabledCompressionEncodings,
+        send_compression_encodings: EnabledCompressionEncodings,
+        max_decoding_message_size: Option<usize>,
+        max_encoding_message_size: Option<usize>,
+    }
+    struct _Inner<T>(Arc<T>);
+    impl<T: BroadcastApi> BroadcastApiServer<T> {
+        pub fn new(inner: T) -> Self {
+            Self::from_arc(Arc::new(inner))
+        }
+        pub fn from_arc(inner: Arc<T>) -> Self {
+            let inner = _Inner(inner);
+            Self {
+                inner,
+                accept_compression_encodings: Default::default(),
+                send_compression_encodings: Default::default(),
+                max_decoding_message_size: None,
+                max_encoding_message_size: None,
+            }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> InterceptedService<Self, F>
+        where
+            F: tonic::service::Interceptor,
+        {
+            InterceptedService::new(Self::new(inner), interceptor)
+        }
+        /// Enable decompressing requests with the given encoding.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.accept_compression_encodings.enable(encoding);
+            self
+        }
+        /// Compress responses with the given encoding, if the client supports it.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.send_compression_encodings.enable(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.max_decoding_message_size = Some(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.max_encoding_message_size = Some(limit);
+            self
+        }
+    }
+    impl<T, B> tonic::codegen::Service<http::Request<B>> for BroadcastApiServer<T>
+    where
+        T: BroadcastApi,
+        B: Body + Send + 'static,
+        B::Error: Into<StdError> + Send + 'static,
+    {
+        type Response = http::Response<tonic::body::BoxBody>;
+        type Error = std::convert::Infallible;
+        type Future = BoxFuture<Self::Response, Self::Error>;
+        fn poll_ready(
+            &mut self,
+            _cx: &mut Context<'_>,
+        ) -> Poll<std::result::Result<(), Self::Error>> {
+            Poll::Ready(Ok(()))
+        }
+        fn call(&mut self, req: http::Request<B>) -> Self::Future {
+            let inner = self.inner.clone();
+            match req.uri().path() {
+                "/tendermint.rpc.grpc.BroadcastAPI/Ping" => {
+                    #[allow(non_camel_case_types)]
+                    struct PingSvc<T: BroadcastApi>(pub Arc<T>);
+                    impl<T: BroadcastApi> tonic::server::UnaryService<super::RequestPing>
+                    for PingSvc<T> {
+                        type Response = super::ResponsePing;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::RequestPing>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move { (*inner).ping(request).await };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let inner = inner.0;
+                        let method = PingSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/tendermint.rpc.grpc.BroadcastAPI/BroadcastTx" => {
+                    #[allow(non_camel_case_types)]
+                    struct BroadcastTxSvc<T: BroadcastApi>(pub Arc<T>);
+                    impl<
+                        T: BroadcastApi,
+                    > tonic::server::UnaryService<super::RequestBroadcastTx>
+                    for BroadcastTxSvc<T> {
+                        type Response = super::ResponseBroadcastTx;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::RequestBroadcastTx>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                (*inner).broadcast_tx(request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let inner = inner.0;
+                        let method = BroadcastTxSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                _ => {
+                    Box::pin(async move {
+                        Ok(
+                            http::Response::builder()
+                                .status(200)
+                                .header("grpc-status", "12")
+                                .header("content-type", "application/grpc")
+                                .body(empty_body())
+                                .unwrap(),
+                        )
+                    })
+                }
+            }
+        }
+    }
+    impl<T: BroadcastApi> Clone for BroadcastApiServer<T> {
+        fn clone(&self) -> Self {
+            let inner = self.inner.clone();
+            Self {
+                inner,
+                accept_compression_encodings: self.accept_compression_encodings,
+                send_compression_encodings: self.send_compression_encodings,
+                max_decoding_message_size: self.max_decoding_message_size,
+                max_encoding_message_size: self.max_encoding_message_size,
+            }
+        }
+    }
+    impl<T: BroadcastApi> Clone for _Inner<T> {
+        fn clone(&self) -> Self {
+            Self(Arc::clone(&self.0))
+        }
+    }
+    impl<T: std::fmt::Debug> std::fmt::Debug for _Inner<T> {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            write!(f, "{:?}", self.0)
+        }
+    }
+    impl<T: BroadcastApi> tonic::server::NamedService for BroadcastApiServer<T> {
+        const NAME: &'static str = "tendermint.rpc.grpc.BroadcastAPI";
+    }
+}