export interface SalesSdkDishFirebaseSnapshot {
    key?: string | null;
    val: () => unknown;
}
export interface SalesSdkDishFirebase {
    onDataChange?: (path: string, callback: (snapshot: SalesSdkDishFirebaseSnapshot) => void) => unknown;
    onDataChanged?: (path: string, callback: (snapshot: SalesSdkDishFirebaseSnapshot) => void) => unknown;
    removeDataListener?: (listener: unknown) => void;
}
export interface SubscribeSalesSdkDishFirebaseInput {
    firebase: SalesSdkDishFirebase;
    recordPath: string;
    onConnectionChange: (connected: boolean) => void;
    onSnapshot: (value: unknown) => void;
    onChildChange: (key: string, value: unknown) => void;
}
/**
 * 将 Firebase SDK 差异封装在一个可测试边界内。
 * 当前 utils/firebase 的 onValue/onChildChanged 返回 unsubscribe 函数；
 * 同时兼容旧实现返回 listener token 的 removeDataListener 方式。
 */
export declare function subscribeSalesSdkDishFirebase({ firebase, recordPath, onConnectionChange, onSnapshot, onChildChange, }: SubscribeSalesSdkDishFirebaseInput): () => void;