webhook-integration

The code is a conventional Express webhook receiver and contains no evident malware, credential exfiltration, reverse shell, suspicious network activity, destructive behavior, or obfuscated payload. It has several security and reliability weaknesses: raw-body signature verification is implemented incorrectly, malformed signature lengths can generate server errors, replay protection is incomplete, the secret is not explicitly checked at startup, and untrusted payloads are logged. The module should be hardened before production use, especially by verifying the exact raw body, validating signature format and length, enforcing a body limit, and deduplicating webhook event IDs.