/**
 * Shared Message Status Callback Handler
 *
 * Handles POST /sms/status and /whatsapp/status — called by Twilio
 * when a message delivery status changes (queued, sent, delivered,
 * undelivered, failed, read).
 *
 * Twilio sends these fields (among others):
 * - MessageSid: unique message identifier
 * - MessageStatus: queued | sending | sent | delivered | undelivered | failed | read
 * - From: sender phone number
 * - To: recipient phone number
 * - ErrorCode: Twilio error code (only on failure)
 * - ErrorMessage: human-readable error (only on failure)
 */
import type { Context } from "hono";
import type { MessagingChannel, TalkerDependencies } from "../../types";
/**
 * Handle a message status callback from Twilio.
 * Shared by both SMS and WhatsApp status endpoints.
 */
export declare function handleStatusCallback(c: Context, deps: TalkerDependencies, channel: MessagingChannel): Promise<Response>;