export declare const XPOD_NOTIFICATIONS_PROTOCOL = "xpod.notifications.v1";
export type DeviceNotificationOperation = 'create' | 'update' | 'delete' | 'invalidate';
export type DeviceNotificationClientFrame = {
    type: 'hello';
    protocol: typeof XPOD_NOTIFICATIONS_PROTOCOL;
    resumeFrom?: number;
} | {
    type: 'register';
    requestId: string;
    topics: string[];
} | {
    type: 'unregister';
    requestId: string;
    topics: string[];
} | {
    type: 'ack';
    sequence: number;
};
export type DeviceNotificationServerFrame = {
    type: 'ready';
    connectionId: string;
    sequence: number;
} | {
    type: 'registered' | 'unregistered';
    requestId: string;
    topics: string[];
} | {
    type: 'event';
    sequence: number;
    eventId: string;
    topic: string;
    object?: string;
    operation: DeviceNotificationOperation;
    emittedAt: string;
} | {
    type: 'resync-required';
    topics: string[];
    reason: 'gap' | 'overflow' | 'expired';
} | {
    type: 'error';
    requestId?: string;
    code: string;
    message: string;
};
export interface ParseClientFrameOptions {
    origin?: string;
    seenRequestIds?: Set<string>;
    maxTopicsPerBatch?: number;
}
export declare function parseClientFrame(input: unknown, options?: ParseClientFrameOptions): DeviceNotificationClientFrame;
export declare function serializeServerFrame(frame: DeviceNotificationServerFrame): string;
export declare function createProtocolErrorFrame(code: string, message: string, requestId?: string): DeviceNotificationServerFrame;
export declare function parseDeviceNotificationSubprotocols(header: string | string[] | undefined): {
    protocolAccepted: boolean;
    ticket?: string;
};