From 922a0131429e2e219509c8a84335b0fa1004d60d Mon Sep 17 00:00:00 2001
From: Ross Nicoll <jrn@jrn.me.uk>
Date: Sun, 18 Oct 2015 14:03:11 +0100
Subject: [PATCH] Correct length of block header when hashing at an offset

---
 core/src/main/java/org/bitcoinj/core/Block.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/bitcoinj/core/Block.java b/core/src/main/java/org/bitcoinj/core/Block.java
index 27a29198..26e8645c 100644
--- a/core/src/main/java/org/bitcoinj/core/Block.java
+++ b/core/src/main/java/org/bitcoinj/core/Block.java
@@ -191,7 +191,7 @@ public class Block extends Message {
         difficultyTarget = readUint32();
         nonce = readUint32();
 
-        hash = Sha256Hash.wrapReversed(Sha256Hash.hashTwice(payload, offset, cursor));
+        hash = Sha256Hash.wrapReversed(Sha256Hash.hashTwice(payload, offset, cursor - offset));
 
         headerParsed = true;
         headerBytesValid = parseRetain;