declare enum PayloadType {
    TEXT = "text",
    IMAGE = "image",
    VIDEO = "video",
    AUDIO = "audio",
    FILE = "file"
}
declare class Message {
    id: string;
    sessionId: string;
    parentSessionId?: string;
    payload: {
        input: string;
        inputType: PayloadType;
        parameters: Record<string, any>;
    };
    metadata?: {
        sender: string;
        timestamp: string;
        priority: string;
        context: Record<string, any>;
        correlationId: string | null;
    };
    constructor(sessionId: string, content: string, inputType?: PayloadType, parameters?: Record<string, any>, context?: Record<string, any>, sender?: string, priority?: string, correlationId?: null, parentSessionId?: string);
}
export { Message, PayloadType };