export type UserIdentifyPayload = {
    userId: string;
    firstName?: string;
    lastName?: string;
    email?: string;
    phone?: string;
    avatar?: string;
    properties?: Record<string, unknown>;
};
export declare function registerWidgetHost(widgetHost: string): void;
export declare function pushUserIdentifyToIframes(payload: UserIdentifyPayload): void;
/**
 * Register an agent iframe created during widget init. Identity is pushed on
 * load and on every subsequent identify() call until the registration is removed.
 */
export declare function registerBrainfishIframe(iframe: HTMLIFrameElement, widgetHost: string, options?: {
    signal?: AbortSignal;
}): void;
export declare function unregisterBrainfishIframe(iframe: HTMLIFrameElement): void;
export declare function ensureIdentityListener(): void;
export declare function normalizeIdentifyPayload(userData: Record<string, unknown>): UserIdentifyPayload | null;
/**
 * Stores identity on the host page and delivers it to agent iframes.
 * Returns the normalized payload for analytics, or null if invalid.
 */
export declare function setUserIdentity(userData: Record<string, unknown>): UserIdentifyPayload | null;
export declare function getLatestIdentifyPayload(): UserIdentifyPayload | null;
/**
 * Wraps window.BrainfishAnalytics so direct callers of
 * BrainfishAnalytics('identify', payload) also deliver identity to agent
 * iframes. The wrapper re-applies whenever the global is reassigned (the
 * web-tracker CDN script replaces the bootstrap queue function on load).
 */
export declare function installBrainfishAnalyticsIdentityHook(): void;
/** @internal Test helper */
export declare function resetUserIdentityState(): void;