Signature verification and security
Explains how ReceiptRoller Webhook HMAC-SHA256 signature verification works, sample verification code (Node.js / Python / C#), replay-attack countermeasures, and how to manage secrets safely.
Webhook is not being delivered
How to isolate the cause when a Webhook does not reach your receiving endpoint. Walks through checking, in order, the endpoint settings, subscribed events, reachability, signature-verification failures, and firewalls.
Store-facing: Guide to Issuing Digital Receipts from Your Own App and Getting Webhook Notifications
Explains how a store or brand issues digital receipts to customers from its own app and receives real-time notifications via Webhooks. Covers app registration, OAuth, Webhook setup, and signature verification.
SNS Webhook bypass (forwarding Webhooks from external SNS such as LINE)
Explains the mechanism, setup, signature handling, and cautions of the "SNS Webhook bypass" feature, which forwards Webhooks ReceiptRoller receives from SNS platforms such as LINE to a developer app, with the store's consent.