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The receiver was the one unauthenticated, internet-facing endpoint with no rate limit, so a misbehaving or hostile sender could flood a webhook without bound. RECEIVER_RATE_LIMIT (default 120/min) now caps it, keyed on client IP plus entrypoint path so one entrypoint cannot exhaust another's budget. Over-limit requests get 429 with Retry-After. The limiter deliberately does not reuse postRateLimit: that helper is POST-only and keys on IP alone, whereas the receiver must count every method. A test locks that property in. Config parsing follows the fail-loudly idiom: a set-but-unparseable or non-positive value aborts startup rather than falling back to the default. Known limitation, tracked in #88: the key still trusts forwarded headers unconditionally, so the limit is evadable by rotating X-Forwarded-For until trusted-proxy gating lands.
6.6 KiB
6.6 KiB