import { custom, customJson } from '../util/logging.js';
import type { Reader } from './service_account.js';
/**
 * Reads another service-account reader once and reuses the result.
 *
 * Use this wrapper when the source is expensive and credentials do not rotate
 * while the process runs. Do not use it when later file changes must take
 * effect.
 */
export declare class CachedReader implements Reader {
    [custom]: () => string;
    private readonly next;
    /** Contains the fully qualified runtime type name. */
    readonly $type = "nebius.sdk.CachedReader";
    private _cache?;
    /** Creates a lazy cache. The wrapped reader is not called until first use. */
    constructor(next: Reader);
    /** Returns the first successful read for the lifetime of this wrapper. */
    read(): import("./service_account.js").ServiceAccount;
    /** Returns a JSON-safe value for logs. */
    [customJson](): unknown;
    /** Returns the exchange token request. */
    getExchangeTokenRequest(): import("../../api/nebius/iam/v1/index.js").ExchangeTokenRequest;
}
//# sourceMappingURL=cached.d.ts.map