import { ConnectorError } from '../types/error.types.js';
/**
 * The error a Novu-style multi-target `sendMessage()` throws when every target
 * failed. When all per-target errors agree on a `ProviderCode` (e.g. a single
 * device token answering `429 TooManyProviderTokenUpdates` → `auth_failed`)
 * that code and status are kept, so a caller's retry policy sees the real
 * cause instead of a synthetic 500; otherwise the code is `unknown`. The
 * per-target errors ride on `cause.errors`.
 */
export declare function allTargetsFailedError(provider: string, reasons: unknown[], messages: string[]): ConnectorError;