export interface KeyStorer {
    get<ExpectedValue = unknown>(): Promise<ExpectedValue | null>;
    put(value: string, expirationTtl: number): Promise<void>;
}
/**
 * Class to get or store fetched public keys from a client certificates URL.
 */
export declare class WorkersKVStore implements KeyStorer {
    private readonly cacheKey;
    private readonly cfKVNamespace;
    constructor(cacheKey: string, cfKVNamespace: KVNamespace);
    get<ExpectedValue = unknown>(): Promise<ExpectedValue | null>;
    put(value: string, expirationTtl: number): Promise<void>;
}