import type { EftposMethodResult, PaymentQueryResult, PaymentUnifiedResponse } from '../../../types';
/** 单次请求超时时间。 */
export declare const REQUEST_TIMEOUT: number;
/** 判断响应是否是统一 payment 响应。 */
export declare const isUnifiedResponse: (value: unknown) => value is PaymentUnifiedResponse<unknown>;
/** 兼容 request fullResult 包装，取出统一 payment 响应体。 */
export declare const unwrapUnifiedResponse: (response: unknown) => PaymentUnifiedResponse;
/** 兼容交易列表响应，取出统一列表。 */
export declare const unwrapTransactionList: (response: unknown) => PaymentQueryResult[];
/** 从 method_result 中读取 provider 原始响应。 */
export declare const getProviderRaw: (response: PaymentUnifiedResponse<EftposMethodResult>) => {};
/** 把后端 payment failed 响应转成 SDK 标准错误。 */
export declare const toPaymentError: (response: PaymentUnifiedResponse) => never;
/** promise 超时包装。 */
export declare const withRequestTimeout: <T>(request: Promise<T>, signal?: AbortSignal) => Promise<T>;
/** 延迟指定时间，期间尊重 session destroy。 */
export declare const wait: (ms: number, shouldContinue: () => boolean) => Promise<void>;