isWithinIdempotencyReplayWindow — @gj-kit/toss-payments

A public function from @gj-kit/toss-payments/server. The signature below is taken directly from the 0.6.1 release declaration.

Verified import example

import { isWithinIdempotencyReplayWindow } from '@gj-kit/toss-payments/server';

Signature, parameters, and return type

/**
 * Whether a key first used at `issuedAt` may still be **replayed** (same key, same body) at `now`.
 *
 * Exact semantics: returns `true` when `now - issuedAt < windowMs` — elapsed time strictly less
 * than the window. At exactly `windowMs` the window has closed and the result is `false`.
 * A negative elapsed time (`issuedAt` after `now`, e.g. clock skew) counts as within the window;
 * reject implausible future timestamps separately if your flow needs to. Any non-finite operand
 * (invalid `Date`, `NaN`, `±Infinity` — in `issuedAt`, `now`, or `windowMs`) yields `false`, the
 * side that never resubmits.
 *
 * `windowMs` defaults to {@link DEFAULT_IDEMPOTENCY_REPLAY_WINDOW_MS}; pass
 * {@link TOSS_IDEMPOTENCY_KEY_TTL_MS} only if you deliberately want the provider's full window
 * with no safety margin.
 */
declare function isWithinIdempotencyReplayWindow(issuedAt: Date | number, now: Date | number, windowMs?: number): boolean;

This declaration is the source of truth for parameters, optionality, generics, return values, and public union/type contracts. Check the package golden path and this subpath’s import conditions for required environment, permission, and error boundaries before calling it.

Release context

• Package: @gj-kit/toss-payments
• Version: 0.6.1
• Public entry: ./server
• Source: GitHub