From 24d1e3aebd672cda336b0ae053408cf5c3153b51 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Sat, 16 Sep 2023 15:51:41 -0300
Subject: [PATCH] lmdbn/badgern: fix for tag array crashes on query planner.

---
 plugins/storage/badgern/query.go | 9 ++++++++-
 plugins/storage/lmdbn/query.go   | 9 ++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/plugins/storage/badgern/query.go b/plugins/storage/badgern/query.go
index 70593c5..1e5c692 100644
--- a/plugins/storage/badgern/query.go
+++ b/plugins/storage/badgern/query.go
@@ -248,7 +248,14 @@ func prepareQueries(filter nostr.Filter) (
 		extraFilter = &nostr.Filter{Tags: filter.Tags}
 	} else if len(filter.Tags) > 0 {
 		index = indexTagPrefix
-		queries = make([]query, len(filter.Tags))
+
+		// determine the size of the queries array by inspecting all tags sizes
+		size := 0
+		for _, values := range filter.Tags {
+			size += len(values)
+		}
+		queries = make([]query, size)
+
 		extraFilter = &nostr.Filter{Kinds: filter.Kinds}
 		i := 0
 		for _, values := range filter.Tags {
diff --git a/plugins/storage/lmdbn/query.go b/plugins/storage/lmdbn/query.go
index 2ead212..04a1cf7 100644
--- a/plugins/storage/lmdbn/query.go
+++ b/plugins/storage/lmdbn/query.go
@@ -253,7 +253,14 @@ func (b *LMDBBackend) prepareQueries(filter nostr.Filter) (
 		extraFilter = &nostr.Filter{Tags: filter.Tags}
 	} else if len(filter.Tags) > 0 {
 		dbi = b.indexTag
-		queries = make([]query, len(filter.Tags))
+
+		// determine the size of the queries array by inspecting all tags sizes
+		size := 0
+		for _, values := range filter.Tags {
+			size += len(values)
+		}
+		queries = make([]query, size)
+
 		extraFilter = &nostr.Filter{Kinds: filter.Kinds}
 		i := 0
 		for _, values := range filter.Tags {