add wasm support (#700)

* get started

* make it work again

* make it compile again

* Use async-wasm-feature of jsonrpsee from the master branch

* Ensure we enable JS feature of getrandom for the wasm target

* Update subxt/src/lib.rs

* update jsonrpsee

* fix CI

* cargo fmt

* fix wasm test

* fix grumbles

* exclude wasm-tests from workspace

To avoid leaking `jsonrpsee-web` feature into the workspace

Co-authored-by: Igor Matuszewski <xanewok@gmail.com>

codegen/Cargo.toml

@@ -21,7 +21,7 @@ quote = "1.0.8"
 syn = "1.0.58"
 scale-info = { version = "2.0.0", features = ["bit-vec"] }
 subxt-metadata = { version = "0.24.0", path = "../metadata" }
-jsonrpsee = { version = "0.15.1", features = ["async-client", "client-ws-transport", "http-client"] }
+jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport", "http-client"] }
 hex = "0.4.3"
 tokio = { version = "1.8", features = ["macros", "rt-multi-thread"] }
 

codegen/src/utils/fetch_metadata.rs

@@ -71,7 +71,7 @@ async fn fetch_metadata_http(url: &Uri) -> Result<String, FetchMetadataError> {
         .request_timeout(Duration::from_secs(180))
         .build(url.to_string())?;
 
-    Ok(client.request::<String>("state_getMetadata", None).await?)
+    Ok(client.request("state_getMetadata", rpc_params![]).await?)
 }
 
 #[derive(Debug)]