import { Context } from '@curveball/core';
import { HttpError } from '@curveball/http-errors';
interface OAuthError extends HttpError {
    errorCode: string;
}
export declare function serializeError(ctx: Context, err: OAuthError): void;
export declare class InvalidRequest extends Error implements OAuthError {
    httpCode: number;
    errorCode: string;
}
export declare class UnsupportedGrantType extends Error implements OAuthError {
    httpCode: number;
    errorCode: string;
}
export declare class UnauthorizedClient extends Error implements OAuthError {
    httpCode: number;
    errorCode: string;
}
export {};