/**
 * @license
 * Copyright 2018 Palantir Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
export interface IQoSMetadata {
    retryHint?: string;
    dueTo?: string;
}
export declare enum ConjureErrorType {
    Network = "NETWORK",
    Other = "OTHER",
    Parse = "PARSE",
    Status = "STATUS"
}
/**
 * Brands every {@link ConjureError} so {@link isConjureError} recognises errors from a *different* copy of
 * conjure-client (where `instanceof` fails), including ones that have crossed a Web Worker / `postMessage`
 * boundary. It has to be an own, enumerable, string-keyed property because that is the only shape structured
 * clone preserves — a symbol or prototype brand would be dropped by the clone. The price is visibility: it
 * necessarily surfaces in `JSON.stringify`, `Object.keys`, spread and `for...in`. The `"instanceof "` prefix
 * makes a branded object self-describing.
 */
export declare const IS_CONJURE_ERROR_KEY = "instanceof conjure-client#ConjureError";
export declare class ConjureError<E> {
    readonly [IS_CONJURE_ERROR_KEY]: true;
    readonly type: ConjureErrorType;
    readonly originalError?: any;
    readonly status?: number;
    readonly body?: string | E;
    readonly qos?: IQoSMetadata;
    constructor(errorType: ConjureErrorType, originalError?: any, status?: number, body?: string | E, qos?: IQoSMetadata);
    toString(): string;
}
export declare function isConjureError(error: unknown): error is ConjureError<unknown>;