import { AuthenticationStrategy } from '@wix/sdk-types';
export type AppStrategy = AuthenticationStrategy<undefined> & {
    getInstallUrl(opts: {
        redirectUrl: string;
        state?: string;
        token?: string;
    }): string;
    handleOAuthCallback(url: string, opts?: {
        state: string;
    }): Promise<{
        instanceId: string;
        accessToken: string;
        refreshToken: string;
    }>;
    /**
     * Return a new instance of the AppStrategy which uses an elevated access token
     */
    elevated(): Promise<AppStrategy>;
    /**
     * Returns infromation about the active token
     */
    getTokenInfo(): Promise<{
        active: boolean;
        subjectType: 'APP' | 'USER' | 'MEMBER' | 'VISITOR' | 'UNKNOWN';
        subjectId: string;
        exp: number;
        iat: number;
        clientId?: string;
        siteId: string;
        instanceId?: string;
    }>;
};
/**
 * Creates an authentication strategy for Wix Apps OAuth installation process.
 * Use this authentication strategy when making requests to Wix APIs from your Wix App backend.
 * @param opts Options for initializing the authentication strategy
 * @param opts.appId The Wix App ID
 * @param opts.appSecret The Wix App Secret
 * @param opts.refreshToken An optional refresh token previously retrieved from Wix OAuth API
 * @param opts.instanceId An optional instance ID of the Wix App instance the client is making requests on behalf of
 * @param opts.accessToken An optional access token previously retrieved from a client Wix Extension
 * @param opts.publicKey An optional public key for validating webhook requests (supports both PEM and base64 encoded keys)
 * @returns An authentication strategy that can be used with WixClient
 * @example
 * ```ts
 * import { AppStrategy, createClient } from '@wix/sdk';
 * import { products } from '@wix/stores';
 *
 * const client = createClient({
 *  auth: AppStrategy({
 *   appId: 'appId',
 *   appSecret: 'appSecret',
 *  }),
 *  modules: { products },
 * });
 *
 * const installUrl = client.auth.getInstallUrl({ redirectUrl: 'https://example.com' });
 * // Redirect the user to the installUrl
 *
 * ...
 *
 * // in the callback handler of your http server
 * // req.url is the url of the callback request
 * const { instanceId, refreshToken } = await client.auth.handleOAuthCallback(req.url);
 *
 * // store the instanceId and refreshToken in your database
 * // use the authorized client
 * const products = await client.products.queryProducts().find();
 *
 * ```
 */
export declare function AppStrategy(opts: {
    appId: string;
    appSecret?: string;
    publicKey?: string;
    authServerBaseUrl?: string;
} & ({
    refreshToken?: string;
} | {
    instanceId?: string;
} | {
    accessToken?: string;
})): AppStrategy;