implement session handling for unsubscribe in subxt-client (#242)

* implement session handling for unsubscribe in subxt-client

Signed-off-by: Gregory Hill <gregorydhill@outlook.com>

* update jsonrpsee to `v0.2.0-alpha.2`

Closes #241

* use new jsonrpsee request message types in subxt client

Signed-off-by: Gregory Hill <gregorydhill@outlook.com>

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

src/lib.rs

@@ -195,9 +195,8 @@ impl<T: Runtime> ClientBuilder<T> {
             let url = self.url.as_deref().unwrap_or("ws://127.0.0.1:9944");
             if url.starts_with("ws://") || url.starts_with("wss://") {
                 let mut config = WsConfig::with_url(&url);
-                // max notifs per subscription capacity.
-                config.max_subscription_capacity = 4096;
-                RpcClient::WebSocket(WsClient::new(WsConfig::with_url(&url)).await?)
+                config.max_notifs_per_subscription = 4096;
+                RpcClient::WebSocket(WsClient::new(config).await?)
             } else {
                 let client = HttpClient::new(url, HttpConfig::default())?;
                 RpcClient::Http(Arc::new(client))

src/rpc.rs

@@ -171,6 +171,7 @@ pub enum RpcClient {
 }
 
 impl RpcClient {
+    /// Start a JSON-RPC request.
     pub async fn request<T: DeserializeOwned>(
         &self,
         method: &str,
@@ -186,6 +187,7 @@ impl RpcClient {
         }
     }
 
+    /// Start a JSON-RPC Subscription.
     pub async fn subscribe<T: DeserializeOwned>(
         &self,
         subscribe_method: &str,