From 08eba888fe510896f1863be6f2b5a72a91616975 Mon Sep 17 00:00:00 2001
From: DanConwayDev <DanConwayDev@protonmail.com>
Date: Wed, 7 Jan 2026 11:26:48 +0000
Subject: Add DomainThrottle for per-domain rate limiting

Implement per-domain throttling for purgatory sync operations:
- Concurrent request limit (max in-flight requests per domain)
- Rate limit (max requests per minute via sliding window)
- Fair round-robin queue processing across identifiers
- In-progress tracking to prevent duplicate fetches
- Tried URL tracking per identifier

Add indexmap dependency for ordered iteration in round-robin queue.

Includes 6 unit tests covering:
- Concurrent limit enforcement
- Rate limit enforcement (sliding window)
- Round-robin fair processing
- In-progress identifier skipping
- Round-robin index adjustment on removal
- Tried URL merging on re-enqueue
---
 Cargo.lock | 1 +
 1 file changed, 1 insertion(+)

(limited to 'Cargo.lock')

diff --git a/Cargo.lock b/Cargo.lock
index fbcc015..03afcbb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1435,6 +1435,7 @@ dependencies = [
  "http-body-util",
  "hyper 1.8.1",
  "hyper-util",
+ "indexmap",
  "lazy_static",
  "nostr-lmdb",
  "nostr-relay-builder",
-- 
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