Added a read example with smoldot

examples/smoldot_read.js

@@ -0,0 +1,34 @@
+import * as smoldot from 'smoldot';
+import { cryptoWaitReady } from '@polkadot/util-crypto';
+import { ApiPromise, WsProvider } from '@polkadot/api';
+
+
+async function main() {
+    await cryptoWaitReady();
+
+    // Download the raw chain spec from an RPC node.
+    // Note: The dApps or the actual application should not connect to any external RPC node,
+    //       but should instead use chain specs provided directly.
+    // 12346 is Bob's validator rpc port, because Alice does not have `bootNodes`.
+    const ws = new WsProvider('ws://localhost:12346');
+    const api = await ApiPromise.create({ provider: ws });
+    await api.isReady;
+    const chainSpec = await api.rpc.syncstate.genSyncSpec(true);
+
+    const client = smoldot.start();
+
+    await client
+            .addChain({ chainSpec: chainSpec.toString() })
+            .then((chain) => {
+                chain.sendJsonRpc(`{"jsonrpc":"2.0","id":12,"method":"chain_getFinalizedHead","params":[]}`);
+                return chain;
+            })
+            .then(async (chain) => {
+                const response = await chain.nextJsonRpcResponse();
+                console.log("✅ JSON-RPC response:", response);
+                return chain;
+            })
+            .then(() => client.terminate());
+}
+
+await main();