More exampels and ensure light client things work. Remove unstable from unstable-light-client

subxt/examples/rpc_client.rs

@@ -0,0 +1,38 @@
+//! We can provide a custom RPC client to Subxt to use, instead of the default.
+use subxt::config::RpcConfigFor;
+use subxt::{Error, OnlineClient, PolkadotConfig};
+use subxt_rpcs::client::{ReconnectingRpcClient, RpcClient};
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+    let config = PolkadotConfig::new();
+
+    // Configure an RPC client. Here we use the reconnecting one, but several impls are
+    // available, or you can implement the subxt_rpcs::client::RpcClientT trait yourself
+    // to bring your own RPC client.
+    let inner_rpc_client = ReconnectingRpcClient::builder()
+        .build("wss://rpc.ibp.network/polkadot")
+        .await
+        .map_err(Error::other)?;
+
+    let rpc_client = RpcClient::new(inner_rpc_client);
+
+    // Pass it to Subxt to use.
+    let client = OnlineClient::from_rpc_client(config, rpc_client.clone()).await?;
+
+    // We can use the Subxt client:
+    let at_block = client.at_current_block().await?;
+    let header = at_block.block_header().await?;
+    println!("Current block header via Subxt: {header:?}");
+
+    // Since we cloned the RPC client above, we can use it ourselves too:
+    let legacy_rpcs =
+        subxt_rpcs::methods::LegacyRpcMethods::<RpcConfigFor<PolkadotConfig>>::new(rpc_client);
+    let header = legacy_rpcs
+        .chain_get_header(Some(at_block.block_hash()))
+        .await?
+        .unwrap();
+    println!("Current block header via RPC call: {header:?}");
+
+    Ok(())
+}