import { custom, customJson, Logger } from '../util/logging.js';
import { type Reader, ServiceAccount } from './service_account.js';
/**
 * Compatibility error type for unsupported private keys.
 *
 * {@link PkFileReader} does not currently throw this error. Key parsing or
 * signing can report another error when the SDK uses the key.
 */
export declare class WrongKeyTypeError extends Error {
}
/**
 * Reads a PEM private key and combines it with service-account identifiers.
 *
 * Unlike
 * {@link https://nebius.github.io/js-sdk/classes/runtime_service_account_credentials_file.CredentialsFileReader.html | CredentialsFileReader},
 * this reader loads the private-key file each time {@link PkFileReader.read}
 * runs. Restrict access to the file because it contains a secret.
 */
export declare class PkFileReader implements Reader {
    [custom]: () => string;
    private logger?;
    /** Contains the fully qualified runtime type name. */
    readonly $type = "nebius.sdk.PkFileReader";
    private readonly kid;
    private readonly said;
    private readonly filePath;
    /**
     * Creates a reader for a PEM file.
     *
     * A leading `~` in `filename` resolves to the home directory.
     */
    constructor(filename: string, publicKeyId: string, serviceAccountId: string, logger?: Logger | undefined);
    /** Returns a JSON-safe value for logs. */
    [customJson](): object;
    /** Reads the current PEM file and returns signing credentials. */
    read(): ServiceAccount;
    /** Returns the exchange token request. */
    getExchangeTokenRequest(): import("../../api/nebius/iam/v1/index.js").ExchangeTokenRequest;
}
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