import { SudoUserClient } from './user-client-interface';
import { SudoPlatformSignInCallback } from './sign-in-callback';
export { SudoPlatformSignInCallback };
/**
 * A reusable helper class that provides sign-in checking functionality for Sudo Platform libraries.
 *
 * This class encapsulates the logic for checking if a user is signed in and invoking a callback
 * to handle sign-in when needed. It is designed to be used by any SudoPlatform Client
 * to provide consistent sign-in callback behavior across the platform.
 */
export declare class SignInGuard {
    private readonly userClient;
    private callbackRef?;
    constructor(userClient: SudoUserClient, callback?: SudoPlatformSignInCallback);
    /**
     * Sets the callback to be invoked when sign-in is required.
     *
     * @param callback A callback implementing {@link SudoPlatformSignInCallback},
     *   or undefined to disable sign-in checking.
     */
    setCallback(callback?: SudoPlatformSignInCallback): void;
    /**
     * Checks if the user is signed in and invokes the callback if needed.
     *
     * This method performs the following:
     * 1. If no callback is set, returns immediately (backward-compatible behaviour).
     * 2. Checks if the user is signed in using {@link SudoUserClient.isSignedIn}.
     * 3. If not signed in, invokes the callback's {@link SudoPlatformSignInCallback.signIn} method.
     *
     * @throws Any error thrown by the callback's signIn() method, or errors from
     *   checking sign-in status (sign-in status errors are swallowed and treated as
     *   "not signed in").
     */
    ensureSignedIn(): Promise<void>;
}