diff --git a/native/utils/crypto-utils.js b/native/utils/crypto-utils.js
new file mode 100644
--- /dev/null
+++ b/native/utils/crypto-utils.js
@@ -0,0 +1,47 @@
+// @flow
+
+import * as React from 'react';
+
+import {
+  getOlmSessionInitializationData,
+  getOlmSessionInitializationDataActionTypes,
+} from 'lib/actions/user-actions.js';
+import {
+  useServerCall,
+  useDispatchActionPromise,
+} from 'lib/utils/action-utils.js';
+
+import { commCoreModule } from '../native-modules.js';
+
+function useInitialNotificationsEncryptedMessage(): () => Promise<string> {
+  const callGetOlmSessionInitializationData = useServerCall(
+    getOlmSessionInitializationData,
+  );
+  const dispatchActionPromise = useDispatchActionPromise();
+
+  return React.useCallback(async () => {
+    const olmSessionDataPromise = callGetOlmSessionInitializationData();
+
+    dispatchActionPromise(
+      getOlmSessionInitializationDataActionTypes,
+      olmSessionDataPromise,
+    );
+
+    const { signedIdentityKeysBlob, notifInitializationInfo } =
+      await olmSessionDataPromise;
+
+    const { notificationIdentityPublicKeys } = JSON.parse(
+      signedIdentityKeysBlob.payload,
+    );
+
+    const { prekey, prekeySignature, oneTimeKey } = notifInitializationInfo;
+    return await commCoreModule.initializeNotificationsSession(
+      JSON.stringify(notificationIdentityPublicKeys),
+      prekey,
+      prekeySignature,
+      oneTimeKey,
+    );
+  }, [callGetOlmSessionInitializationData, dispatchActionPromise]);
+}
+
+export { useInitialNotificationsEncryptedMessage };