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Fix geohash filtering (#376)

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* fix(geohash): enforce client-side filter on subscription and validate 'g' tag in handler; move dedup after validation; avoid misrouting events across geohashes

* cleanup duplicate code block

* remove
This commit is contained in:
callebtc
2025-09-05 13:26:38 +02:00
committed by GitHub
parent 905ccf5f17
commit 91f3f270d4
2 changed files with 22 additions and 1 deletions
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app/src/main/java/com/bitchat/android/nostr/NostrGeohashService.kt
+12 -1
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@@ -1167,13 +1167,24 @@ class NostrGeohashService(
private fun handleUnifiedGeohashEvent(event: NostrEvent, geohash: String) {
coroutineScope.launch(Dispatchers.Default) {
try {
Log.v(TAG, "🔍 handleUnifiedGeohashEvent called - eventGeohash: $geohash, currentGeohash: $currentGeohash, eventKind: ${event.kind}, eventId: ${event.id.take(8)}...")
Log.v(TAG, "🔍 handleUnifiedGeohashEvent called - subGeohash: $geohash, currentGeohash: $currentGeohash, kind: ${event.kind}, id: ${event.id.take(8)}...")
// Only handle ephemeral kind 20000 events
if (event.kind != 20000) {
Log.v(TAG, "❌ Skipping non-ephemeral event (kind ${event.kind})")
return@launch
}
// VALIDATE EVENT G TAG AGAINST SUBSCRIPTION GEOHASH
val eventGeohash = event.tags.firstOrNull { it.size >= 2 && it[0] == "g" }?.getOrNull(1)
if (eventGeohash == null) {
Log.w(TAG, "🚫 Dropping kind=20000 without 'g' tag id=${event.id.take(8)}")
return@launch
}
if (!eventGeohash.equals(geohash, ignoreCase = true)) {
Log.w(TAG, "🚫 Dropping mismatched geohash event: sub=$geohash eventTag=$eventGeohash id=${event.id.take(8)}")
return@launch
}
// Check Proof of Work validation BEFORE other processing
val powSettings = PoWPreferenceManager.getCurrentSettings()