import type { IAuthenticationContextInternal, IGetTokenOptions, ISPOBOFlowParameters, ITokenProvider, _OBO3PTokenFunction, OBOTokenFunction } from '../../ITokenProvider';
/**
 * Class that wraps the ADAL's authentication class
 * @internal
 */
export declare class OboTokenProvider implements ITokenProvider {
    private readonly _oboFirstPartyTokenCallback?;
    private readonly _oboThirdPartyTokenCallback?;
    private static _logSource;
    readonly servicePrincipalId: string;
    private readonly _authContext;
    private readonly _serverRelativeUrl;
    private readonly _spHttpClient;
    private readonly _cachedTokens;
    private _oboFirstPartyTokenRequest;
    private _getTokenQosExtraData;
    constructor(authContext: IAuthenticationContextInternal, tokenParameters: ISPOBOFlowParameters, _oboFirstPartyTokenCallback?: OBOTokenFunction | undefined, _oboThirdPartyTokenCallback?: _OBO3PTokenFunction | undefined);
    getToken(resourceEndpoint: string, options?: IGetTokenOptions): Promise<string>;
    getToken(resourceEndpoint: string, useCachedToken?: boolean): Promise<string>;
    _ensureState(): Promise<void>;
    _ensureTelemetry(): Promise<void>;
    private _getAccessToken;
    /**
     * Returns an access token if a valid cached token exists
     */
    private _tryGetCachedAccessTokenOld;
    /**
     * Returns an access token if a valid cached token exists
     */
    private _tryGetCachedAccessToken;
    /**
     * See the following link for details about handling conditional access policies.
     * https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-conditional-access-developer
     */
    private _fetchAccessToken;
    private _getOboAuthToken;
    private _isTokenExpired;
    private _exchange1PTokenFor3P;
    /**
     * Wraps the ADAL.js callback code with a promise.
     */
    private _fetchAccessTokenSilent;
    private _fetchAccessTokenFromSecureBroker;
    private _fetchAccessTokenFromTenant;
    private _handleOboResponse;
    private _getOboResponseJson;
    /**
     * Adal creates an iframe without the sandbox attribute.
     * Adal assumes it's being used as a singleton but this will not work for our scenario.
     */
    private _patchAdalAuthContext;
}
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