feat(proto): grpc server and client support

proto-compiler/Cargo.toml

@@ -17,3 +17,15 @@ regex = { "version" = "1.7.1" }
 ureq = { "version" = "2.6.2" }
 zip = { version = "0.6.4", default-features = false, features = ["deflate"] }
 fs_extra = { version = "1.3.0" }
+tonic-build = { version = "0.11.0", optional = true }
+
+
+[features]
+default = []
+# Enable gRPC support; needed by server and client features.
+# Conflicts with no_std
+grpc = ["dep:tonic-build"]
+# Build the gRPC server. Requires tenderdash-proto/std feature.
+server = ["grpc"]
+# Build the gRPC client. Requires tenderdash-proto/std feature.
+client = ["grpc"]

proto-compiler/src/lib.rs

@@ -97,6 +97,14 @@ pub fn proto_compile() {
     let tenderdash_ver = tenderdash_version(tenderdash_dir);
 
     println!("[info] => Creating structs.");
+
+    #[cfg(feature = "grpc")]
+    tonic_build::configure()
+        .generate_default_stubs(true)
+        .compile_with_config(pb, &protos, &proto_includes_paths)
+        .unwrap();
+
+    #[cfg(not(feature = "grpc"))]
     pb.compile_protos(&protos, &proto_includes_paths).unwrap();
 
     println!("[info] => Removing old structs and copying new structs.");

proto/Cargo.toml

@@ -15,10 +15,21 @@ description = """
 [package.metadata.docs.rs]
 all-features = true
 
+[features]
+default = ["grpc-server"]
+
+# Enable standard library support
+std = ["prost/std", "prost-types/std"]
+# Build gRPC server
+grpc-server = ["tenderdash-proto-compiler/server", "std"]
+grpc-client = ["tenderdash-proto-compiler/client", "std"]
+
 [dependencies]
 prost = { version = "0.12", default-features = false, features = [
     "prost-derive",
 ] }
+prost-types = { version = "0.12", default-features = false }
+tonic = { version = "0.11" }
 bytes = { version = "1.0", default-features = false, features = ["serde"] }
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 subtle-encoding = { version = "0.5", default-features = false, features = [

proto/src/lib.rs

@@ -1,7 +1,7 @@
 //! tenderdash-proto library gives the developer access to the Tenderdash
 //! proto-defined structs.
 
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![deny(warnings, trivial_casts, trivial_numeric_casts, unused_import_braces)]
 #![allow(clippy::large_enum_variant)]
 #![forbid(unsafe_code)]