import { ErrorRequestHandler } from 'express';
export declare class FallthroughError extends Error {
}
export declare class OAuth2ServerError extends Error {
    readonly statusCode: number;
    readonly error: string;
    readonly errorDescription: string;
    constructor(statusCode: number, error: string, errorDescription: string);
}
export declare class InvalidRequest extends OAuth2ServerError {
    constructor(errorDescription: string);
}
export declare class InvalidClient extends OAuth2ServerError {
    constructor(errorDescription: string);
}
export declare class AccessDenied extends OAuth2ServerError {
    constructor();
}
export declare class InvalidScope extends OAuth2ServerError {
    constructor(scope: string);
}
export declare class InvalidGrant extends OAuth2ServerError {
    constructor(errorDescription: string);
}
export declare class UnsupportedGrantType extends OAuth2ServerError {
    constructor(grantType: string);
}
export declare class ServerError extends OAuth2ServerError {
    constructor();
}
interface ErrorResponse {
    error: string;
    error_description: string;
}
export declare type ErrorHandler = ErrorRequestHandler<never, ErrorResponse, never, never, never>;
export declare const makeErrorHandler: ({ issuer }: {
    issuer: string;
}) => {
    errorHandler: ErrorHandler;
};
export {};