diff --git a/native/redux/client-db-utils.js b/native/redux/client-db-utils.js
new file mode 100644
--- /dev/null
+++ b/native/redux/client-db-utils.js
@@ -0,0 +1,73 @@
+// @flow
+
+import type {
+  ClientDBThreadInfo,
+  ClientDBThreadStoreOperation,
+  RawThreadInfo,
+} from 'lib/types/thread-types.js';
+import {
+  convertClientDBThreadInfoToRawThreadInfo,
+  convertRawThreadInfoToClientDBThreadInfo,
+} from 'lib/utils/thread-ops-utils.js';
+
+import type { AppState } from './state-types.js';
+import { commCoreModule } from '../native-modules.js';
+
+type ThreadStoreThreadInfos = { +[id: string]: RawThreadInfo };
+
+function updateClientDBThreadStoreThreadInfos(
+  state: AppState,
+  migrationFunc: ThreadStoreThreadInfos => ThreadStoreThreadInfos,
+): AppState {
+  // 1. Get threads from SQLite `threads` table.
+  const clientDBThreadInfos = commCoreModule.getAllThreadsSync();
+
+  // 2. Translate `ClientDBThreadInfo`s to `RawThreadInfo`s.
+  const rawThreadInfos = clientDBThreadInfos.map(
+    convertClientDBThreadInfoToRawThreadInfo,
+  );
+
+  // 3. Convert `rawThreadInfo`s to a map of `threadID` => `threadInfo`.
+  const threadIDToThreadInfo = rawThreadInfos.reduce((acc, threadInfo) => {
+    acc[threadInfo.id] = threadInfo;
+    return acc;
+  }, {});
+
+  // 4. Apply `migrationFunc` to `threadInfo`s.
+  const updatedThreadIDToThreadInfo: ThreadStoreThreadInfos =
+    migrationFunc(threadIDToThreadInfo);
+
+  // 5. Convert the updated `threadInfo`s back into an array.
+  const updatedRawThreadInfos: $ReadOnlyArray<RawThreadInfo> = Object.keys(
+    updatedThreadIDToThreadInfo,
+  ).map(id => updatedThreadIDToThreadInfo[id]);
+
+  // 6. Translate `RawThreadInfo`s to `ClientDBThreadInfo`s.
+  const convertedClientDBThreadInfos: $ReadOnlyArray<ClientDBThreadInfo> =
+    updatedRawThreadInfos.map(convertRawThreadInfoToClientDBThreadInfo);
+
+  // 7. Construct `ClientDBThreadStoreOperation`s to clear SQLite `threads`
+  //    table and repopulate with `ClientDBThreadInfo`s.
+  const operations: $ReadOnlyArray<ClientDBThreadStoreOperation> = [
+    {
+      type: 'remove_all',
+    },
+    ...convertedClientDBThreadInfos.map((thread: ClientDBThreadInfo) => ({
+      type: 'replace',
+      payload: thread,
+    })),
+  ];
+
+  // 8. Try processing `ClientDBThreadStoreOperation`s and log out if
+  //    `processThreadStoreOperationsSync(...)` throws an exception.
+  try {
+    commCoreModule.processThreadStoreOperationsSync(operations);
+  } catch (exception) {
+    console.log(exception);
+    return { ...state, cookie: null };
+  }
+
+  return state;
+}
+
+export { updateClientDBThreadStoreThreadInfos };