import { IAccessToken, IAccessTokenProvider, ITokenContext } from './interfaces';
/**
 * Implementation of {@link IAccessTokenProvider} that returns a
 * user-provided constant access token whenever it is requested by the clients.
 */
export declare class ConstAccessTokenProvider implements IAccessTokenProvider {
    private readonly accessToken;
    /**
     * Creates a new instance of `ConstAccessTokenProvider`
     * @param {IAccessToken} accessToken - The access token to be returned
     * whenever it is requested.
     */
    constructor(accessToken: IAccessToken);
    /**
     * Returns a `Promise` fulfilled with the
     * {@link ConstAccessTokenProvider.accessToken} provided to the constructor
     * of this instance.
     *
     * @param {ITokenContext} context
     * @returns {Promise<IAccessToken>}
     */
    getToken(context: ITokenContext): Promise<IAccessToken>;
}