web: send read receipts for inbound messages

src/provider-web.test.ts

@@ -171,6 +171,9 @@ describe("provider-web", () => {
 		expect(onMessage).toHaveBeenCalledWith(
 			expect.objectContaining({ body: "ping", from: "+999", to: "+123" }),
 		);
+		expect(sock.readMessages).toHaveBeenCalledWith([
+			{ remoteJid: "999@s.whatsapp.net", id: "abc", participant: undefined, fromMe: false },
+		]);
 		expect(sock.sendPresenceUpdate).toHaveBeenCalledWith(
 			"composing",
 			"999@s.whatsapp.net",
@@ -207,6 +210,47 @@ describe("provider-web", () => {
 				mediaType: "image/jpeg",
 			}),
 		);
+		expect(sock.readMessages).toHaveBeenCalledWith([
+			{
+				remoteJid: "888@s.whatsapp.net",
+				id: "med1",
+				participant: undefined,
+				fromMe: false,
+			},
+		]);
+		await listener.close();
+	});
+
+	it("monitorWebInbox includes participant when marking group messages read", async () => {
+		const onMessage = vi.fn();
+		const listener = await monitorWebInbox({ verbose: false, onMessage });
+		const sock = getLastSocket();
+		const upsert = {
+			type: "notify",
+			messages: [
+				{
+					key: {
+						id: "grp1",
+						fromMe: false,
+						remoteJid: "12345-67890@g.us",
+						participant: "111@s.whatsapp.net",
+					},
+					message: { conversation: "group ping" },
+				},
+			],
+		};
+
+		sock.ev.emit("messages.upsert", upsert);
+		await new Promise((resolve) => setImmediate(resolve));
+
+		expect(sock.readMessages).toHaveBeenCalledWith([
+			{
+				remoteJid: "12345-67890@g.us",
+				id: "grp1",
+				participant: "111@s.whatsapp.net",
+				fromMe: false,
+			},
+		]);
 		await listener.close();
 	});
 

src/provider-web.ts

@@ -260,6 +260,20 @@ export async function monitorWebInbox(options: {
 			// Ignore status/broadcast traffic; we only care about direct chats.
 			if (remoteJid.endsWith("@status") || remoteJid.endsWith("@broadcast"))
 				continue;
+			if (id) {
+				const participant = msg.key?.participant;
+				try {
+					await sock.readMessages([
+						{ remoteJid, id, participant, fromMe: false },
+					]);
+					if (isVerbose()) {
+						const suffix = participant ? ` (participant ${participant})` : "";
+						logVerbose(`Marked message ${id} as read for ${remoteJid}${suffix}`);
+					}
+				} catch (err) {
+					logVerbose(`Failed to mark message ${id} read: ${String(err)}`);
+				}
+			}
 			const from = jidToE164(remoteJid);
 			if (!from) continue;
 			let body = extractText(msg.message ?? undefined);

test/mocks/baileys.ts

@@ -5,6 +5,7 @@ export type MockBaileysSocket = {
 	ws: { close: ReturnType<typeof vi.fn> };
 	sendPresenceUpdate: ReturnType<typeof vi.fn>;
 	sendMessage: ReturnType<typeof vi.fn>;
+	readMessages: ReturnType<typeof vi.fn>;
 	user?: { id?: string };
 };
 
@@ -28,6 +29,7 @@ export function createMockBaileys(): { mod: MockBaileysModule; lastSocket: () =>
 			ws: { close: vi.fn() },
 			sendPresenceUpdate: vi.fn().mockResolvedValue(undefined),
 			sendMessage: vi.fn().mockResolvedValue({ key: { id: "msg123" } }),
+			readMessages: vi.fn().mockResolvedValue(undefined),
 			user: { id: "123@s.whatsapp.net" },
 		};
 		setImmediate(() => ev.emit("connection.update", { connection: "open" }));