/**
 * types/broker.ts — Unified message format for hub routing.
 *
 * BrokerMessage is the canonical envelope that flows between the hub
 * and adapters. Every message routed through the hub is wrapped in
 * this format, regardless of the originating transport (WhatsApp,
 * Telegram, PAILot, etc.).
 */
export type BrokerMessageType = "text" | "voice" | "image" | "video" | "file" | "command" | "status";
export interface BrokerMessagePayload {
    text?: string;
    filePath?: string;
    /** Path to audio file on disk (for voice messages). */
    audioPath?: string;
    /** Base64-encoded binary data (for voice/file over JSON IPC). */
    buffer?: string;
    mimetype?: string;
    caption?: string;
    /** External recipient identifier (phone number, chat ID, JID). */
    recipient?: string;
    /** Channel hint for adapter-level routing ("pailot", "whatsapp"). */
    channel?: string;
    /** Adapter-specific extras. */
    metadata?: Record<string, unknown>;
}
export interface BrokerMessage {
    id: string;
    timestamp: number;
    /** Adapter that originated the message. */
    source: string;
    /** Target adapter name. Omit for default routing. */
    target?: string;
    type: BrokerMessageType;
    payload: BrokerMessagePayload;
}
export interface RouteResult {
    ok: boolean;
    /** Which adapter handled the delivery. */
    deliveredTo?: string;
    /** Error description if routing or delivery failed. */
    error?: string;
    /** Result payload from the adapter's deliver handler. */
    adapterResult?: Record<string, unknown>;
}
/** Create a BrokerMessage with sensible defaults. */
export declare function createBrokerMessage(source: string, type: BrokerMessageType, payload: BrokerMessagePayload, target?: string): BrokerMessage;
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