/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { OpenAPIV3 } from 'openapi-types';
type Oauth2Flow = OpenAPIV3.OAuth2SecurityScheme['flows'];
/**
 * OpenIdConnectWithConfig extends OpenIdSecurityScheme with additional
 * configuration options.
 */
export interface OpenIdConnectWithConfig extends OpenAPIV3.OpenIdSecurityScheme {
    authorizationEndpoint: string;
    tokenEndpoint: string;
    userinfoEndpoint?: string;
    revocationEndpoint?: string;
    tokenEndpointAuthMethodsSupported?: string[];
    grantTypesSupported?: string[];
    scopes?: string[];
}
/**
 * AuthSchemes contains SecuritySchemes from OpenAPI 3.0 and an extra flattened
 * OpenIdConnectWithConfig.
 */
export type AuthScheme = OpenAPIV3.SecuritySchemeObject | OpenIdConnectWithConfig;
/**
 * Represents the OAuth2 flow (or grant type).
 */
export declare enum OAuthGrantType {
    CLIENT_CREDENTIALS = "client_credentials",
    AUTHORIZATION_CODE = "authorization_code",
    IMPLICIT = "implicit",
    PASSWORD = "password"
}
/**
 * Converts an OAuthFlows object to a OAuthGrantType.
 */
export declare function getOAuthGrantTypeFromFlow(flow: Oauth2Flow): OAuthGrantType | undefined;
export {};