signWebhookPayload — @gj-kit/toss-payments

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

Verified import example

import { signWebhookPayload } from '@gj-kit/toss-payments/testing';

Signature, parameters, and return type

/**
 * `tosspayments-webhook-signature` 헤더 값 생성 —
 * HMAC-SHA256("{rawBody}:{transmissionTime}", 보안 키) → base64에 "v1:" 접두사.
 *
 * ⚠ 설계 문서(§3.6)의 동기 시그니처에서 Promise 반환으로 변형했다: 서명은
 * WebCrypto(`crypto.subtle`)로만 계산하는데(플랫폼 중립 — node:crypto 금지)
 * subtle API가 Promise 전용이라 동기 반환이 불가능하다.
 */
declare function signWebhookPayload(rawBody: string, transmissionTime: string, key: SecurityKey): Promise<string>;

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: ./testing
• Source: GitHub