Voice-call: fix Twilio status callbacks

extensions/voice-call/src/providers/twilio.ts

@@ -389,12 +389,12 @@ export class TwilioProvider implements VoiceCallProvider {
 
     // Build request params - always use URL-based TwiML.
     // Twilio silently ignores `StatusCallback` when using the inline `Twiml` parameter.
-    const params: Record<string, string> = {
+    const params: Record<string, string | string[]> = {
       To: input.to,
       From: input.from,
       Url: url.toString(), // TwiML serving endpoint
       StatusCallback: statusUrl.toString(), // Separate status callback endpoint
-      StatusCallbackEvent: "initiated ringing answered completed",
+      StatusCallbackEvent: ["initiated", "ringing", "answered", "completed"],
       Timeout: "30",
     };
 

extensions/voice-call/src/providers/twilio/api.ts

@@ -3,16 +3,33 @@ export async function twilioApiRequest<T = unknown>(params: {
   accountSid: string;
   authToken: string;
   endpoint: string;
-  body: Record<string, string>;
+  body: URLSearchParams | Record<string, string | string[]>;
   allowNotFound?: boolean;
 }): Promise<T> {
+  const bodyParams =
+    params.body instanceof URLSearchParams
+      ? params.body
+      : Object.entries(params.body).reduce<URLSearchParams>(
+          (acc, [key, value]) => {
+            if (Array.isArray(value)) {
+              for (const entry of value) {
+                acc.append(key, entry);
+              }
+            } else if (typeof value === "string") {
+              acc.append(key, value);
+            }
+            return acc;
+          },
+          new URLSearchParams(),
+        );
+
   const response = await fetch(`${params.baseUrl}${params.endpoint}`, {
     method: "POST",
     headers: {
       Authorization: `Basic ${Buffer.from(`${params.accountSid}:${params.authToken}`).toString("base64")}`,
       "Content-Type": "application/x-www-form-urlencoded",
     },
-    body: new URLSearchParams(params.body),
+    body: bodyParams,
   });
 
   if (!response.ok) {
@@ -26,4 +43,3 @@ export async function twilioApiRequest<T = unknown>(params: {
   const text = await response.text();
   return text ? (JSON.parse(text) as T) : (undefined as T);
 }
-