build torii-grpc for wasm

Cargo.toml

@@ -91,6 +91,12 @@ prost = "0.12"
 tonic = "0.10"
 tonic-build = "0.10"
 
+# WASM-compatible gRPC deps
+tonic-web-wasm-client = "0.4.0"
+wasm-prost = { version = "0.11.9", package = "prost" }
+wasm-tonic = { version = "0.9.2", default-features = false, features = [ "codegen", "gzip", "prost" ], package = "tonic" }
+wasm-tonic-build = { version = "0.9.2", default-features = false, features = [ "prost" ], package = "tonic-build" }
+
 [patch."https://github.com/starkware-libs/blockifier"]
 blockifier = { git = "https://github.com/dojoengine/blockifier", rev = "c794d1b" }
 

crates/torii/client/Cargo.toml

@@ -20,7 +20,7 @@ starknet-crypto.workspace = true
 starknet.workspace = true
 thiserror.workspace = true
 tonic.workspace = true
-torii-grpc = { path = "../grpc" }
+torii-grpc = { path = "../grpc", features = [ "client" ] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 tokio = { version = "1.16", features = [ "time" ], default-features = false }
@@ -36,6 +36,3 @@ camino.workspace = true
 dojo-test-utils = { path = "../../dojo-test-utils", features = [ "build-examples" ] }
 dojo-world = { path = "../../dojo-world" }
 tokio.workspace = true
-
-[build-dependencies]
-tonic-build.workspace = true

crates/torii/client/src/client/mod.rs

@@ -38,6 +38,7 @@ pub struct ClientBuilder {
 }
 
 impl ClientBuilder {
+    #[must_use]
     pub fn new() -> Self {
         Self { initial_entities_to_sync: None }
     }

crates/torii/grpc/Cargo.toml

@@ -8,21 +8,31 @@ version.workspace = true
 [dependencies]
 anyhow.workspace = true
 dojo-types = { path = "../../dojo-types" }
-futures-util = "0.3.28"
 futures.workspace = true
 parking_lot.workspace = true
-prost.workspace = true
 rayon.workspace = true
-serde_json.workspace = true
-sqlx = { version = "0.6.2", features = [ "chrono", "macros", "offline", "runtime-actix-rustls", "sqlite", "uuid" ] }
 starknet-crypto.workspace = true
 starknet.workspace = true
 thiserror.workspace = true
-tokio = { version = "1.32.0", features = [ "sync" ], default-features = true }
-tokio-stream = { version = "0.1.14", default-features = false }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+tonic-web-wasm-client.workspace = true
+wasm-prost.workspace = true
+wasm-tonic.workspace = true
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+futures-util = "0.3.28"
+prost.workspace = true
+sqlx = { version = "0.6.2", features = [ "chrono", "macros", "offline", "runtime-actix-rustls", "sqlite", "uuid" ] }
+tokio-stream = "0.1.14"
+tokio.workspace = true
 tonic.workspace = true
-tracing.workspace = true
 url.workspace = true
 
 [build-dependencies]
 tonic-build.workspace = true
+wasm-tonic-build.workspace = true
+
+[features]
+client = [  ]
+server = [  ] # this feature can't be build on wasm32

crates/torii/grpc/build.rs

@@ -1,4 +1,22 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tonic_build::compile_protos("proto/world.proto")?;
+    let target = std::env::var("TARGET").expect("failed to get TARGET environment variable");
+    let feature_client = std::env::var("CARGO_FEATURE_CLIENT");
+    let feature_server = std::env::var("CARGO_FEATURE_SERVER");
+
+    if target.contains("wasm32") {
+        if feature_server.is_ok() {
+            panic!("feature `server` is not supported on target `{}`", target);
+        }
+
+        wasm_tonic_build::configure()
+            .build_server(false)
+            .build_client(feature_client.is_ok())
+            .compile(&["proto/world.proto"], &["proto"])?;
+    } else {
+        tonic_build::configure()
+            .build_server(feature_server.is_ok())
+            .build_client(feature_client.is_ok())
+            .compile(&["proto/world.proto"], &["proto"])?;
+    }
     Ok(())
 }