/**
 * COOP-safe OAuth popup communication bridge.
 *
 * When Cross-Origin-Opener-Policy severs window.opener, postMessage and popup.closed
 * checks fail. This module uses localStorage + storage events and BroadcastChannel
 * as reliable fallbacks that work across same-origin popup windows.
 */
export declare const OAUTH_STATE_KEY = "social_login_oauth_pending";
export declare const OAUTH_POPUP_SESSION_KEY = "social_login_oauth_popup";
export declare const OAUTH_RESULT_KEY_PREFIX = "social_login_oauth_result_";
export declare const OAUTH_DELIVERED_KEY = "social_login_oauth_delivered";
export declare const POPUP_WINDOW_NAMES: Set<string>;
export type OAuthBridgeMessage = Record<string, unknown> & {
    type: 'oauth-response' | 'oauth-error';
};
export declare function getOAuthResultKey(nonce: string): string;
export declare function getBroadcastChannelName(provider: string, nonceOrState: string): string;
export declare function markOAuthPopup(nonce: string): void;
export declare function clearOAuthPopupMarker(): void;
export declare function hasOAuthRedirectParams(): boolean;
export declare function isOAuthPopupContext(): boolean;
export declare function shouldAutoFinishOAuthRedirect(): boolean;
/**
 * Deliver OAuth result from popup to opener via all available channels.
 */
export declare function deliverOAuthResult(provider: string, nonceOrState: string | undefined, message: OAuthBridgeMessage): void;
export interface OAuthResultListener {
    onResponse: (data: Record<string, unknown>) => void;
    onError: (error: string, code?: string) => void;
}
/**
 * Listen for OAuth results from popup via postMessage, BroadcastChannel, and localStorage.
 * Returns a cleanup function.
 */
export declare function listenForOAuthResult(provider: string, nonceOrState: string, handlers: OAuthResultListener): () => void;