import type { Nullable } from '../types/index.js';
type LaxPromise<T> = Promise<T> | T | void;
export declare function catchPromise(promise: LaxPromise<any>, errorCb?: (err: any) => void): void;
export declare function wrapAsync<T, TArgs extends any[]>(fn: Nullable<(...args: TArgs) => LaxPromise<T>>, errorCb?: (err: any) => void): (...args: TArgs) => void;
/**
 * Formats an unknown caught value into a human-readable string.
 *
 * Useful at presentation boundaries where a display string is needed.
 * Prefer keeping the raw error for programmatic handling (instanceof checks, .cause, etc.).
 */
export declare function formatError(err: unknown): string;
export {};