From c78c34e145435e8522c0a44cbf82b813999dc718 Mon Sep 17 00:00:00 2001
From: FlowUpgradeInFbsource Bot <noreply+1026736676487289@fb.com>
Date: Sat, 22 Aug 2026 13:38:38 -0700
Subject: [PATCH] Upgrade Flow in fbsource

Differential Revision: D117077055
---
 packages/react-native/Libraries/Blob/FileReader.js               | 1 +
 .../Libraries/Utilities/__tests__/binaryToBase64-itest.js        | 1 +
 packages/react-native/Libraries/WebSocket/WebSocket.js           | 1 +
 .../react-native/Libraries/WebSocket/WebSocketInterceptor.js     | 1 +
 4 files changed, 4 insertions(+)

diff --git a/packages/react-native/Libraries/Blob/FileReader.js b/packages/react-native/Libraries/Blob/FileReader.js
index d76df9308e39..024a66cd9c4d 100644
--- a/packages/react-native/Libraries/Blob/FileReader.js
+++ b/packages/react-native/Libraries/Blob/FileReader.js
@@ -133,6 +133,7 @@ class FileReader extends EventTarget {
         const base64 = text.split(',')[1];
         const typedArray = toByteArray(base64);
 
+        // $FlowFixMe[incompatible-type]
         this._result = typedArray.buffer;
         this._setReadyState(DONE);
       },
diff --git a/packages/react-native/Libraries/Utilities/__tests__/binaryToBase64-itest.js b/packages/react-native/Libraries/Utilities/__tests__/binaryToBase64-itest.js
index bf39041e9805..43b95e4c48bc 100644
--- a/packages/react-native/Libraries/Utilities/__tests__/binaryToBase64-itest.js
+++ b/packages/react-native/Libraries/Utilities/__tests__/binaryToBase64-itest.js
@@ -21,6 +21,7 @@ describe('binaryToBase64', () => {
   it('should encode an ArrayBuffer', () => {
     const bytes = new TextEncoder().encode('Test string');
 
+    // $FlowFixMe[incompatible-type]
     expect(decodeBase64(binaryToBase64(bytes.buffer))).toEqual(
       Array.from(bytes),
     );
diff --git a/packages/react-native/Libraries/WebSocket/WebSocket.js b/packages/react-native/Libraries/WebSocket/WebSocket.js
index 6ed5630f7438..9c08c3bdd0b6 100644
--- a/packages/react-native/Libraries/WebSocket/WebSocket.js
+++ b/packages/react-native/Libraries/WebSocket/WebSocket.js
@@ -246,6 +246,7 @@ class WebSocket extends EventTarget {
         let data: Blob | BlobData | ArrayBuffer | string = ev.data;
         switch (ev.type) {
           case 'binary':
+            // $FlowFixMe[incompatible-type]
             data = base64.toByteArray(ev.data).buffer;
             break;
           case 'blob':
diff --git a/packages/react-native/Libraries/WebSocket/WebSocketInterceptor.js b/packages/react-native/Libraries/WebSocket/WebSocketInterceptor.js
index 9d051902d06b..d329fc0fe7e6 100644
--- a/packages/react-native/Libraries/WebSocket/WebSocketInterceptor.js
+++ b/packages/react-native/Libraries/WebSocket/WebSocketInterceptor.js
@@ -244,6 +244,7 @@ const WebSocketInterceptor = {
     ) {
       return `ArrayBuffer {${String(Array.from(new Uint8Array(value)))}}`;
     }
+    // $FlowFixMe[incompatible-type]
     return value;
   },