feat(whatsapp-adapter): Add typing indicator support

.changeset/tiny-ways-switch.md

@@ -0,0 +1,5 @@
+---
+"@chat-adapter/whatsapp": minor
+---
+
+Add WhatsApp typing indicator support by sending Meta's read-plus-typing payload when a recent inbound message is available. Update the default API version to v25.0.

apps/docs/content/docs/adapters.mdx

@@ -44,7 +44,7 @@ Ready to build your own? Follow the [building](/docs/contributing/building) guid
 | Mentions | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ |
 | Add reactions | ✅ | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ |
 | Remove reactions | ✅ | ❌ | ✅ | ✅ | ✅ | ⚠️ | ⚠️ | ❌ |
-| Typing indicator | ❌ | ✅ | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| Typing indicator | ❌ | ✅ | ❌ | ✅ | ✅ | ❌ | ❌ | ⚠️ |
 | DMs | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ |
 | Ephemeral messages | ✅ Native | ❌ | ✅ Native | ❌ | ❌ | ❌ | ❌ | ❌ |
 

apps/docs/content/docs/adapters/whatsapp.mdx

@@ -150,7 +150,7 @@ All options are auto-detected from environment variables when not provided.
 | `appSecret` | No* | App secret for webhook signature verification. Auto-detected from `WHATSAPP_APP_SECRET` |
 | `phoneNumberId` | No* | Bot's phone number ID. Auto-detected from `WHATSAPP_PHONE_NUMBER_ID` |
 | `verifyToken` | No* | Secret for webhook verification handshake. Auto-detected from `WHATSAPP_VERIFY_TOKEN` |
-| `apiVersion` | No | Graph API version (defaults to `v21.0`) |
+| `apiVersion` | No | Graph API version (defaults to `v25.0`) |
 | `userName` | No | Bot username. Auto-detected from `WHATSAPP_BOT_USERNAME` or defaults to `whatsapp-bot` |
 | `logger` | No | Logger instance (defaults to `ConsoleLogger("info")`) |
 

packages/adapter-whatsapp/README.md

@@ -67,7 +67,7 @@ All options are auto-detected from environment variables when not provided. You
 | `appSecret` | No* | App secret for webhook verification. Auto-detected from `WHATSAPP_APP_SECRET` |
 | `phoneNumberId` | No* | Bot's phone number ID. Auto-detected from `WHATSAPP_PHONE_NUMBER_ID` |
 | `verifyToken` | No* | Webhook verification secret. Auto-detected from `WHATSAPP_VERIFY_TOKEN` |
-| `apiVersion` | No | Graph API version (defaults to `v21.0`) |
+| `apiVersion` | No | Graph API version (defaults to `v25.0`) |
 | `userName` | No | Bot username for self-message detection. Auto-detected from `WHATSAPP_BOT_USERNAME` (defaults to `whatsapp-bot`) |
 | `logger` | No | Logger instance (defaults to `ConsoleLogger("info")`) |
 
@@ -130,7 +130,7 @@ export async function POST(request: Request) {
 | Feature | Supported |
 |---------|-----------|
 | Reactions | Yes (add and remove) |
-| Typing indicator | No (not supported by Cloud API) |
+| Typing indicator | Yes (requires a recent inbound message and has a 25-second cooldown period) |
 | DMs | Yes |
 | Open DM | Yes |
 

packages/adapter-whatsapp/src/index.test.ts

@@ -948,11 +948,98 @@ describe("addReaction / removeReaction", () => {
 // ---------------------------------------------------------------------------
 
 describe("startTyping", () => {
-  it("is a no-op and does not throw", async () => {
+  let fetchSpy: MockInstance;
+
+  const makeGraphApiResponse = () =>
+    new Response(JSON.stringify({ success: true }), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    });
+
+  beforeEach(() => {
+    fetchSpy = vi
+      .spyOn(global, "fetch")
+      .mockImplementation(() => Promise.resolve(makeGraphApiResponse()));
+  });
+
+  afterEach(() => {
+    fetchSpy.mockRestore();
+  });
+
+  it("resolves latest inbound message ID and sends typing indicator", async () => {
     const adapter = createTestAdapter();
-    await expect(
-      adapter.startTyping("whatsapp:123456789:15551234567")
-    ).resolves.toBeUndefined();
+    const threadId = "whatsapp:123456789:15551234567";
+
+    // Mock history: 1 inbound message, 1 outbound (bot) message
+    const mockState = {
+      getList: vi.fn().mockResolvedValue([
+        {
+          _type: "chat:Message",
+          id: "wamid.inbound123",
+          threadId,
+          text: "Hi",
+          author: {
+            userId: "15551234567",
+            userName: "User",
+            fullName: "User",
+            isMe: false,
+            isBot: false,
+          },
+          formatted: { type: "root", children: [] },
+          attachments: [],
+          metadata: { dateSent: new Date().toISOString(), edited: false },
+        },
+        {
+          _type: "chat:Message",
+          id: "wamid.outbound456",
+          threadId,
+          text: "Hello",
+          author: {
+            userId: "123456789",
+            userName: "bot",
+            fullName: "bot",
+            isMe: true,
+            isBot: true,
+          },
+          formatted: { type: "root", children: [] },
+          attachments: [],
+          metadata: { dateSent: new Date().toISOString(), edited: false },
+        },
+      ]),
+    };
+
+    await adapter.initialize({
+      ...mockChat,
+      getState: () => mockState,
+    } as any);
+
+    await adapter.startTyping(threadId);
+
+    expect(fetchSpy).toHaveBeenCalledOnce();
+    const [url, init] = fetchSpy.mock.calls[0];
+    expect(String(url)).toContain("/123456789/messages");
+    const sent = JSON.parse(init?.body as string);
+    expect(sent.status).toBe("read");
+    expect(sent.message_id).toBe("wamid.inbound123");
+    expect(sent.typing_indicator.type).toBe("text");
+  });
+
+  it("does nothing if no inbound message is found in history", async () => {
+    const adapter = createTestAdapter();
+    const threadId = "whatsapp:123456789:15551234567";
+
+    const mockState = {
+      getList: vi.fn().mockResolvedValue([]),
+    };
+
+    await adapter.initialize({
+      ...mockChat,
+      getState: () => mockState,
+    } as any);
+
+    await adapter.startTyping(threadId);
+
+    expect(fetchSpy).not.toHaveBeenCalled();
   });
 });
 

packages/adapter-whatsapp/src/index.ts

@@ -1,5 +1,9 @@
 import { createHmac, timingSafeEqual } from "node:crypto";
-import { extractCard, ValidationError } from "@chat-adapter/shared";
+import {
+  AdapterError,
+  extractCard,
+  ValidationError,
+} from "@chat-adapter/shared";
 import type {
   Adapter,
   AdapterPostableMessage,
@@ -24,6 +28,7 @@ import {
   defaultEmojiResolver,
   getEmoji,
   Message,
+  MessageHistoryCache,
 } from "chat";
 import { cardToWhatsApp, decodeWhatsAppCallbackData } from "./cards";
 import { WhatsAppFormatConverter } from "./markdown";
@@ -36,11 +41,12 @@ import type {
   WhatsAppRawMessage,
   WhatsAppSendResponse,
   WhatsAppThreadId,
+  WhatsAppTypingIndicatorResponse,
   WhatsAppWebhookPayload,
 } from "./types";
 
 /** Default Graph API version */
-const DEFAULT_API_VERSION = "v21.0";
+const DEFAULT_API_VERSION = "v25.0";
 
 /** Maximum message length for WhatsApp Cloud API */
 const WHATSAPP_MESSAGE_LIMIT = 4096;
@@ -955,13 +961,57 @@ export class WhatsAppAdapter
   /**
    * Start typing indicator.
    *
-   * WhatsApp supports typing indicators via the messages endpoint.
-   * The indicator displays for up to 25 seconds or until the next message.
+   * WhatsApp typing indicators require the most recent inbound message ID.
+   * They also implicitly mark the referenced message as read.
    *
-   * @see https://developers.facebook.com/docs/whatsapp/cloud-api/messages/mark-messages-as-read
+   * @see https://developers.facebook.com/documentation/business-messaging/whatsapp/typing-indicators
    */
-  async startTyping(_threadId: string, _status?: string): Promise<void> {
-    // WhatsApp Cloud API does not support typing indicators.
+  async startTyping(threadId: string, status?: string): Promise<void> {
+    const messageId = await this.resolveTypingTargetMessageId(threadId);
+    this.logger.debug("WhatsApp typing indicator requested", {
+      messageId,
+      threadId,
+    });
+
+    if (!messageId) {
+      this.logger.warn(
+        "WhatsApp typing indicator skipped - no inbound message context",
+        { threadId }
+      );
+      return;
+    }
+
+    if (status) {
+      this.logger.warn("WhatsApp typing indicator ignores custom status text", {
+        status,
+        threadId,
+        messageId,
+      });
+    }
+
+    const response =
+      await this.graphApiRequest<WhatsAppTypingIndicatorResponse>(
+        `/${this.phoneNumberId}/messages`,
+        {
+          messaging_product: "whatsapp",
+          status: "read",
+          message_id: messageId,
+          typing_indicator: {
+            type: "text",
+          },
+        }
+      );
+
+    if (!response.success) {
+      this.logger.error(
+        "WhatsApp typing indicator failed: API returned success=false",
+        {
+          messageId,
+          threadId,
+        }
+      );
+      throw new AdapterError("WhatsApp typing indicator failed", "whatsapp");
+    }
   }
 
   /**
@@ -1125,6 +1175,29 @@ export class WhatsAppAdapter
   // Private helpers
   // =============================================================================
 
+  /**
+   * Resolve the latest inbound message ID for a thread.
+   */
+  private async resolveTypingTargetMessageId(
+    threadId: string
+  ): Promise<string | null> {
+    if (!this.chat) {
+      return null;
+    }
+
+    const state = this.chat.getState();
+    const history = await new MessageHistoryCache(state).getMessages(threadId);
+
+    for (let index = history.length - 1; index >= 0; index--) {
+      const message = history[index];
+      if (message && !message.author.isMe) {
+        return message.id;
+      }
+    }
+
+    return null;
+  }
+
   /**
    * Make a request to the Meta Graph API.
    */
@@ -1148,7 +1221,10 @@ export class WhatsAppAdapter
         body: errorBody,
         path,
       });
-      throw new Error(`WhatsApp API error: ${response.status} ${errorBody}`);
+      throw new AdapterError(
+        `WhatsApp API error: ${response.status} ${errorBody}`,
+        "whatsapp"
+      );
     }
 
     return response.json() as Promise<T>;

packages/adapter-whatsapp/src/types.ts

@@ -22,7 +22,7 @@ import type { Logger } from "chat";
 export interface WhatsAppAdapterConfig {
   /** Access token (System User token) for WhatsApp Cloud API calls */
   accessToken: string;
-  /** Meta Graph API version (default: "v21.0") */
+  /** Meta Graph API version (default: "v25.0") */
   apiVersion?: string;
   /** Meta App Secret for webhook HMAC-SHA256 signature verification */
   appSecret: string;
@@ -266,6 +266,13 @@ export interface WhatsAppSendResponse {
   messaging_product: "whatsapp";
 }
 
+/**
+ * Response from sending a typing indicator via the Cloud API.
+ */
+export interface WhatsAppTypingIndicatorResponse {
+  success: boolean;
+}
+
 /**
  * Interactive message payload for sending buttons or lists.
  */