export interface WidgetExchange {
    request: Record<string, unknown>;
    onResult: (d: Record<string, unknown>) => {
        done: true;
        value: unknown;
    } | {
        done: false;
    } | {
        error: string;
    };
}
/**
 * Run one signer exchange through the in-app widget. Resolves when `onResult`
 * accepts a result; falls back to `popupFallback` if the frame cannot be mounted
 * or never loads.
 */
export declare function runWidget<T>(url: string, signerOrigin: string, ex: WidgetExchange, popupFallback: () => Promise<T>): Promise<T>;