diff --git a/lib/ops/user-store-ops.js b/lib/ops/user-store-ops.js
new file mode 100644
--- /dev/null
+++ b/lib/ops/user-store-ops.js
@@ -0,0 +1,82 @@
+// @flow
+
+import { type BaseStoreOpsHandlers } from './base-ops.js';
+import type { UserInfo, UserInfos } from '../types/user-types.js';
+
+// client types
+export type ReplaceUserOperation = {
+  +type: 'replace_user',
+  +payload: UserInfo,
+};
+
+export type RemoveUsersOperation = {
+  +type: 'remove_users',
+  +payload: { +ids: $ReadOnlyArray<string> },
+};
+
+export type RemoveAllUsersOperation = {
+  +type: 'remove_all_users',
+};
+
+export type UserStoreOperation =
+  | ReplaceUserOperation
+  | RemoveUsersOperation
+  | RemoveAllUsersOperation;
+
+// SQLite types
+export type ClientDBUserInfo = {
+  +id: string,
+  +username: ?string,
+  +relationshipStatus?: string,
+  +avatar?: ?string,
+};
+
+export type ClientDBReplaceUserOperation = {
+  +type: 'replace_user',
+  +payload: ClientDBUserInfo,
+};
+
+export type ClientDBUserStoreOperation =
+  | ClientDBReplaceUserOperation
+  | RemoveUsersOperation
+  | RemoveAllUsersOperation;
+
+const userStoreOpsHandlers: BaseStoreOpsHandlers<
+  UserInfos,
+  UserStoreOperation,
+  ClientDBUserStoreOperation,
+  UserInfos,
+  ClientDBUserInfo,
+> = {
+  processStoreOperations(
+    userInfos: UserInfos,
+    ops: $ReadOnlyArray<UserStoreOperation>,
+  ): UserInfos {
+    if (ops.length === 0) {
+      return userInfos;
+    }
+
+    let processedUserInfos = { ...userInfos };
+    for (const operation: UserStoreOperation of ops) {
+      if (operation.type === 'replace_user') {
+        processedUserInfos[operation.payload.id] = operation.payload;
+      } else if (operation.type === 'remove_users') {
+        for (const id of operation.payload.ids) {
+          delete processedUserInfos[id];
+        }
+      } else if (operation.type === 'remove_all_users') {
+        processedUserInfos = {};
+      }
+    }
+    return processedUserInfos;
+  },
+
+  convertOpsToClientDBOps(): $ReadOnlyArray<ClientDBUserStoreOperation> {
+    return [];
+  },
+  translateClientDBData(): UserInfos {
+    return {};
+  },
+};
+
+export { userStoreOpsHandlers };