diff --git a/examples/smoldot_auth_and_store.js b/examples/smoldot_auth_and_store.js
new file mode 100644
index 000000000..f2f7857cc
--- /dev/null
+++ b/examples/smoldot_auth_and_store.js
@@ -0,0 +1,43 @@
+import * as smoldot from 'smoldot';
+import fs from 'fs';
+import { ApiPromise } from "@polkadot/api";
+import { Keyring } from "@polkadot/keyring";
+import { WsProvider } from "@polkadot/api";
+
+const chainSpec = fs.readFileSync('./node/chain-specs/bulletin-polkadot.json', 'utf8');
+const client = smoldot.start();
+
+// Bulletin address
+const provider = new WsProvider('ws://localhost:10000');
+const api = await ApiPromise.create({ provider });
+await api.isReady;
+
+const keyring = new Keyring({ type: 'sr25519' });
+const sudo_pair = keyring.addFromUri('//Alice');
+const who_pair = keyring.addFromUri('//Alice');
+
+// data
+const who = who_pair.address; // ✅ base58 string
+const transactions = 32;
+const bytes = 64 * 1024 * 1024; // 64 MB
+
+const authorizeTx = api.tx.transactionStorage.authorizeAccount(
+    who,
+    transactions,
+    bytes
+  );
+
+const signedTx = await authorizeTx.signAsync(sudo_pair);
+console.log("✅ Signed transaction:", signedTx.toHex());
+
+await client
+    .addChain({ chainSpec })
+    .then((chain) => {
+        chain.sendJsonRpc(`{"jsonrpc":"2.0","id":2,"method":"author_submitAndWatchExtrinsic","params":["${signedTx.toHex()}"]}`);
+        return chain;
+      })
+      .then(async (chain) => {
+        const response = await chain.nextJsonRpcResponse();
+        console.log("✅ JSON-RPC response:", response);
+      })
+      .then(() => client.terminate())
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