import { Bearer, Receiver, Token } from '../token.js';
import { custom, customJson } from '../util/logging.js';
/** Reports that a token environment variable is empty. */
export declare class NoTokenInEnvError extends Error {
}
/**
 * Provides one fixed access token.
 *
 * This bearer does not renew the token and does not retry authentication.
 * Prefer a renewable credential source for long-running applications.
 *
 * @example
 * ```ts
 * import { SDK } from '@nebius/js-sdk';
 * import { StaticBearer } from '@nebius/js-sdk/runtime/token/static';
 *
 * const sdk = new SDK({
 *   credentials: new StaticBearer(process.env.NEBIUS_TOKEN ?? ''),
 *   userAgentPrefix: 'example-application/1.0',
 * });
 * ```
 */
export declare class StaticBearer extends Bearer {
    [custom]: () => string;
    /** Contains the fully qualified runtime type name. */
    readonly $type: string;
    private _tok;
    /** Creates a bearer for a non-empty token string or {@link Token}. */
    constructor(token: Token | string);
    /** Returns a JSON-safe value for logs. */
    [customJson](): unknown;
    /** Creates a token receiver. */
    receiver(): Receiver;
}
/**
 * Reads one fixed access token from an environment variable.
 *
 * The constructor reads the variable immediately. It throws
 * {@link NoTokenInEnvError} when the variable is missing or empty.
 */
export declare class EnvBearer extends StaticBearer {
    /** Contains the fully qualified runtime type name. */
    readonly $type = "nebius.sdk.EnvBearer";
    /** Reads the token from `envVarName`, which defaults to `NEBIUS_TOKEN`. */
    constructor(envVarName?: string);
}
//# sourceMappingURL=static.d.ts.map