wechat-webhooks

name	wechat-webhooks
description	Receive and verify WeChat Pay (APIv3) webhook notifications. Use when setting up WeChat Pay webhook handlers, debugging Wechatpay-Signature RSA-SHA256 verification, decrypting the AEAD_AES_256_GCM encrypted resource, or handling payment and refund events like TRANSACTION.SUCCESS, REFUND.SUCCESS, and REFUND.CLOSED.
license	MIT
metadata	{"author":"hookdeck","version":"0.1.0","repository":"https://github.com/hookdeck/webhook-skills"}

WeChat Pay Webhooks

When to Use This Skill

• How do I receive WeChat Pay webhooks (APIv3 notifications)?
• How do I verify the Wechatpay-Signature header?
• How do I decrypt the encrypted resource in a WeChat Pay notification?
• How do I handle TRANSACTION.SUCCESS or REFUND.SUCCESS events?
• Why is my WeChat Pay signature verification failing?

How WeChat Pay Notifications Work

WeChat Pay APIv3 does not use HMAC or the Standard Webhooks spec. Each notification is:

1. Asymmetrically signed (SHA256withRSA) — verify with the WeChat Pay platform public key, matched by the Wechatpay-Serial header, over the message "{timestamp}\n{nonce}\n{body}\n".
2. Separately encrypted — the resource object is ciphertext. Decrypt with your 32-byte to recover the transaction/refund JSON.