From 2e1012da8b1135ba1569a6bc4c8b2fc856af17c8 Mon Sep 17 00:00:00 2001
From: Craig Raw <craigraw@gmail.com>
Date: Thu, 25 Jun 2020 16:44:25 +0200
Subject: [PATCH] fix off by one bug

---
 .../java/com/sparrowwallet/drongo/wallet/Wallet.java   | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
index 4d5e2be..d65ab46 100644
--- a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
@@ -101,18 +101,18 @@ public class Wallet {
             purposeNode = optionalPurposeNode.get();
         }
 
-        purposeNode.fillToIndex(getLookAhead(purposeNode));
+        purposeNode.fillToIndex(getLookAheadIndex(purposeNode));
         return purposeNode;
     }
 
-    public int getLookAhead(WalletNode node) {
-        int lookAhead = DEFAULT_LOOKAHEAD;
+    public int getLookAheadIndex(WalletNode node) {
+        int lookAheadIndex = DEFAULT_LOOKAHEAD - 1;
         Integer highestUsed = node.getHighestUsedIndex();
         if(highestUsed != null) {
-            lookAhead = highestUsed + lookAhead;
+            lookAheadIndex = highestUsed + DEFAULT_LOOKAHEAD;
         }
 
-        return lookAhead;
+        return lookAheadIndex;
     }
 
     public WalletNode getFreshNode(KeyPurpose keyPurpose) {