import { Endpoint } from './types.js';
export declare const sleep: (ms: number) => Promise<unknown>;
/**
 * Safe JSON parse for fetch responses. Reads the body once and tolerates
 * non-JSON payloads (e.g. NGINX HTML 5xx gateway pages) by returning a
 * `{ message }` shell that downstream error code paths can still consume.
 *
 * Prevents the failure mode tracked in #1727: callers doing
 * `throw PaymentsError.fromBackend('...', await response.json())` would
 * otherwise let a SyntaxError from `.json()` escape and surface as an
 * `unhandledRejection` that can take the host Node process down.
 */
export declare function safeParseJson(response: Response): Promise<unknown>;
export declare const jsonReplacer: (_key: any, value: {
    toString: () => any;
}) => string | {
    toString: () => any;
};
export declare const getServiceHostFromEndpoints: (endpoints: Endpoint[]) => string;
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