From 3d4838f52560173bf8eaab753cd33da74cf9dde0 Mon Sep 17 00:00:00 2001
From: Gregory Sanders <gsanders87@gmail.com>
Date: Wed, 15 Feb 2017 17:12:14 -0500
Subject: [PATCH] BlindOutputs: fixup blinding check at end

---
 src/blind.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/blind.cpp b/src/blind.cpp
index 2db4e96472..0dbd134537 100644
--- a/src/blind.cpp
+++ b/src/blind.cpp
@@ -250,12 +250,17 @@ bool BlindOutputs(std::vector<uint256 >& input_blinding_factors, const std::vect
         }
     }
 
+    // secp throws a fit if total isn't larger than number of inputs
+    if (nBlindsOut < 1) {
+        return false;
+    }
+
     // Check blinding(even if nothing has been done)
     unsigned char tempFinalBlind[32];
-    memcpy(tempFinalBlind, &blind[nBlinded-1][0], 32);
-    memset(&blind[nBlinded-1][0], 0, 32);
+    memcpy(tempFinalBlind, blindptrs.back(), 32);
+    memset(blindptrs.back(), 0, 32);
     assert(secp256k1_pedersen_blind_generator_blind_sum(secp256k1_blind_context, &blindedAmounts[0], &assetblindptrs[0], &blindptrs[0], nBlindsOut + nBlindsIn, nBlindsIn));
-    if (memcmp(&blind[nBlinded-1][0], tempFinalBlind, 32))
+    if (memcmp(blindptrs.back(), tempFinalBlind, 32))
         return false;
 
     return true;