export interface AsyncKVCache {
    get<T = unknown>(key: string): Promise<T | undefined>;
    set<T = unknown>(key: string, val: T, opts?: {
        ttlSec?: number;
    }): Promise<void>;
    del(key: string): Promise<void>;
    has(key: string): Promise<boolean>;
    ttl(key: string): Promise<number | null>;
    touch(key: string, ttlSec: number): Promise<boolean>;
    keys(prefix?: string): Promise<string[]>;
    clear(prefix?: string): Promise<void>;
    mget<T = unknown>(keys: string[]): Promise<(T | undefined)[]>;
    mset<T = unknown>(entries: Array<[string, T]>, opts?: {
        ttlSec?: number;
    }): Promise<void>;
}
export declare class CacheKV implements AsyncKVCache {
    private dbName;
    private storeName;
    private dbVersion;
    private dbp;
    constructor(dbName: string, storeName: string, dbVersion?: number);
    private static idbAvailable;
    private open;
    private tx;
    private isExpired;
    get<T = unknown>(key: string): Promise<T | undefined>;
    set<T = unknown>(key: string, val: T, opts?: {
        ttlSec?: number;
    }): Promise<void>;
    del(key: string): Promise<void>;
    has(key: string): Promise<boolean>;
    ttl(key: string): Promise<number | null>;
    touch(key: string, ttlSec: number): Promise<boolean>;
    keys(prefix?: string): Promise<string[]>;
    clear(prefix?: string): Promise<void>;
    mget<T = unknown>(keys: string[]): Promise<(T | undefined)[]>;
    mset<T = unknown>(entries: Array<[string, T]>, opts?: {
        ttlSec?: number;
    }): Promise<void>;
}
export declare function createKV(dbName: string, storeName: string, version?: number): AsyncKVCache;
export declare function createUnlockCache(): AsyncKVCache;
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