From 55b57021584e817e499a5289902083b64130f1a6 Mon Sep 17 00:00:00 2001
From: CalDescent <caldescent@protonmail.com>
Date: Sun, 30 Jan 2022 21:00:27 +0000
Subject: [PATCH] Invalidate last low weight block signature whenever the
 previous block data changes.

---
 src/main/java/org/qortal/controller/BlockMinter.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/org/qortal/controller/BlockMinter.java b/src/main/java/org/qortal/controller/BlockMinter.java
index a6aa21a8..154f7e25 100644
--- a/src/main/java/org/qortal/controller/BlockMinter.java
+++ b/src/main/java/org/qortal/controller/BlockMinter.java
@@ -195,6 +195,9 @@ public class BlockMinter extends Thread {
 
 					// Reduce log timeout
 					logTimeout = 10 * 1000L;
+
+					// Last low weight block is no longer valid
+					parentSignatureForLastLowWeightBlock = null;
 				}
 
 				// Discard accounts we have already built blocks with