From 1261b61fffa1e75b56968a268009413e07e02e1e Mon Sep 17 00:00:00 2001
From: mingrammer <mingrammer@gmail.com>
Date: Sat, 26 May 2018 00:31:06 +0900
Subject: [PATCH] Early exits while finding spendable outputs

---
 utxo_set.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/utxo_set.go b/utxo_set.go
index 180ce04..a73cb5a 100644
--- a/utxo_set.go
+++ b/utxo_set.go
@@ -28,6 +28,10 @@ func (u UTXOSet) FindSpendableOutputs(pubkeyHash []byte, amount int) (int, map[s
 			txID := hex.EncodeToString(k)
 			outs := DeserializeOutputs(v)
 
+			if accumulated >= amount {
+				break
+			}
+
 			for outIdx, out := range outs.Outputs {
 				if out.IsLockedWithKey(pubkeyHash) && accumulated < amount {
 					accumulated += out.Value