From 3ae733b416fe9e4b788f12113f1cf9f9cd9252a5 Mon Sep 17 00:00:00 2001
From: Craig Raw <craigraw@gmail.com>
Date: Thu, 24 Jun 2021 11:17:47 +0200
Subject: [PATCH] avoid npe when no parts have been processed

---
 .../sparrowwallet/hummingbird/fountain/FountainDecoder.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/sparrowwallet/hummingbird/fountain/FountainDecoder.java b/src/main/java/com/sparrowwallet/hummingbird/fountain/FountainDecoder.java
index 59b11e7..9f01662 100644
--- a/src/main/java/com/sparrowwallet/hummingbird/fountain/FountainDecoder.java
+++ b/src/main/java/com/sparrowwallet/hummingbird/fountain/FountainDecoder.java
@@ -30,7 +30,7 @@ public class FountainDecoder {
     private final List<Part> queuedParts = new ArrayList<>();
 
     public int getExpectedPartCount() {
-        return expectedPartIndexes.size();
+        return expectedPartIndexes == null ? 0 : expectedPartIndexes.size();
     }
 
     public Set<Integer> getRecievedPartIndexes() {
@@ -46,6 +46,10 @@ public class FountainDecoder {
     }
 
     public double getEstimatedPercentComplete() {
+        if(processedPartsCount == 0) {
+            return 0d;
+        }
+
         double estimatedInputParts = (double)getExpectedPartCount() * 1.75;
         return Math.min(0.99, (double)processedPartsCount / estimatedInputParts);
     }