/**
 * Test whether a value is a valid {@link TierError}
 */
export declare const isTierError: (e: any) => e is TierError;
/**
 * Error subclass raised for any error returned by the API.
 * Should not be instantiated directly.
 */
export declare class TierError extends Error {
    /**
     * The API endpoint that was requested
     */
    path: string;
    /**
     * The data that was sent to the API endpoint.  Will be a parsed
     * JavaScript object unless the request JSON was invalid, in which
     * case it will be a string.
     */
    requestData: any;
    /**
     * The HTTP response status code returned
     */
    status: number;
    /**
     * The `code` field in the {@link ErrorResponse}
     */
    code?: string;
    /**
     * The HTTP response body.  Will be a parsed JavaScript object
     * unless the response JSON was invalid, in which case it will
     * be a string.
     */
    responseData: any;
    /**
     * An underlying system error or other cause.
     */
    cause?: Error;
    constructor(path: string, reqBody: any, status: number, resBody: any, er?: any);
}
/**
 * Response returned by the Tier API on failure
 * @internal
 */
export interface ErrorResponse {
    status: number;
    code: string;
    message: string;
}
/**
 * Test whether a value is a valid {@link ErrorResponse}
 * @internal
 */
export declare const isErrorResponse: (e: any) => e is ErrorResponse;
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