From 5a51f8443343c180792f869e66d14aed2be15cde Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Sun, 6 Aug 2023 19:57:08 -0300
Subject: [PATCH] pool.QuerySingle()

---
 pool.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pool.go b/pool.go
index 978bc34..9949804 100644
--- a/pool.go
+++ b/pool.go
@@ -145,3 +145,13 @@ func (pool *SimplePool) SubManyEose(ctx context.Context, urls []string, filters
 
 	return uniqueEvents
 }
+
+// QuerySingle returns the first event returned by the first relay, cancels everything else.
+func (pool *SimplePool) QuerySingle(ctx context.Context, urls []string, filter Filter) *Event {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+	for evt := range pool.SubManyEose(ctx, urls, Filters{filter}) {
+		return evt
+	}
+	return nil
+}