export declare function cacheHit<T>(path: string, stat: {
    mtimeMs: number;
    size: number;
}): T | undefined;
export declare function cacheSet(path: string, value: unknown, stat: {
    mtimeMs: number;
    size: number;
}): void;
export declare function cacheDelete(path: string): void;
export declare class JsonFile<T> {
    readonly path: string;
    private readonly empty;
    /**
     * The write root as it stood when this store was created. Captured once, on
     * purpose: the root must not be re-derived at write time, because
     * `resolveAnimaHome()` picks a different directory once the current one is
     * deleted. See storage/write-root.ts.
     */
    private readonly writeRoot;
    constructor(path: string, empty: () => T, writeRoot?: string);
    read(): Promise<T>;
    write(value: T): Promise<void>;
    update(op: (current: T) => T | Promise<T>): Promise<T>;
    private refreshCache;
    private readUnlocked;
}
export declare function statOrNull(path: string): Promise<{
    mtimeMs: number;
    size: number;
} | undefined>;
export declare function isMissingFile(error: unknown): boolean;
//# sourceMappingURL=json-file.d.ts.map