Export light-client functionality for WASM

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

testing/wasm-tests/Cargo.lock

@@ -2231,6 +2231,7 @@ dependencies = [
  "smoldot-light",
  "smoldot-light-wasm",
  "sp-core-hashing",
+ "subxt-light-client",
  "subxt-macro",
  "subxt-metadata",
  "thiserror",
@@ -2258,6 +2259,18 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "subxt-light-client"
+version = "0.28.0"
+dependencies = [
+ "console_error_panic_hook",
+ "gloo-timers",
+ "lazy_static",
+ "tracing",
+ "tracing-wasm",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "subxt-macro"
 version = "0.28.0"
@@ -2670,6 +2683,7 @@ dependencies = [
  "console_error_panic_hook",
  "serde_json",
  "subxt",
+ "tracing",
  "tracing-wasm",
  "wasm-bindgen-test",
 ]

testing/wasm-tests/Cargo.toml

@@ -10,6 +10,7 @@ publish = false
 # subxt to work. So, we can't inherit versions.
 wasm-bindgen-test = "0.3.24"
 tracing-wasm = "0.2.1"
+tracing = "0.1.34"
 console_error_panic_hook = "0.1.7"
 serde_json = "1"
 subxt = { path = "../../subxt", default-features = false, features = ["jsonrpsee-web", "unstable-light-client"] }

testing/wasm-tests/tests/wasm.rs

@@ -28,8 +28,14 @@ async fn wasm_ws_transport_works() {
 async fn light_client_transport_works() {
 	init_tracing();
 
-    // let light_client = LightClient::new(include_str!("../../../artifacts/dev_spec.json")).unwrap();
-    // let client = subxt::client::OnlineClient::<PolkadotConfig>::from_rpc_client(Arc::new(light_client)).await.unwrap();
+    tracing::warn!("Starting test");
+    let light_client = LightClient::new(include_str!("../../../artifacts/dev_spec.json")).unwrap();
+    tracing::warn!("RPC layer created..");
+
+    let client = subxt::client::OnlineClient::<PolkadotConfig>::from_rpc_client(Arc::new(light_client)).await.unwrap();
+
+    tracing::warn!("Client Created");
+
 
     // let chain = client.rpc().system_chain().await.unwrap();
     // assert_eq!(&chain, "Development");