/** Shared by OAuthAuthProvider, OAuthRopcAuthProvider and OAuthAuthCodeAuthProvider (avoids circular dependency). */
export declare const BUFFER_IN_MINUTES: 2;
export declare const CLIENT_ID_PARAM: "clientId";
export declare const CLIENT_SECRET_PARAM: "clientSecret";
export declare const USERNAME_PARAM: "username";
export declare const PASSWORD_PARAM: "password";
export declare const CODE_PARAM: "code";
export declare const REDIRECT_URI_PARAM: "redirectUri";
export declare const CODE_VERIFIER_PARAM: "codeVerifier";
export declare const CLIENT_ID_REQUIRED_ERROR_MESSAGE: string;
export declare const CLIENT_SECRET_REQUIRED_ERROR_MESSAGE: string;
export declare const USERNAME_REQUIRED_ERROR_MESSAGE: string;
export declare const PASSWORD_REQUIRED_ERROR_MESSAGE: string;
export declare const CODE_REQUIRED_ERROR_MESSAGE: string;
export declare const REDIRECT_URI_REQUIRED_ERROR_MESSAGE: string;
export declare const CODE_VERIFIER_REQUIRED_ERROR_MESSAGE: string;
export declare function getExpiresAt(expiresInSeconds: number, bufferInMinutes: number): Date;