1 files changed, 8 insertions, 6 deletions
diff --git a/src/merkleblock.cpp b/src/merkleblock.cpp
index 8447f924e4..dca4973cc4 100644
--- a/src/merkleblock.cpp
+++ b/src/merkleblock.cpp
@@ -95,7 +95,7 @@ void CPartialMerkleTree::TraverseAndBuild(int height, unsigned int pos, const st
     }
 }
 
-uint256 CPartialMerkleTree::TraverseAndExtract(int height, unsigned int pos, unsigned int &nBitsUsed, unsigned int &nHashUsed, std::vector<uint256> &vMatch) {
+uint256 CPartialMerkleTree::TraverseAndExtract(int height, unsigned int pos, unsigned int &nBitsUsed, unsigned int &nHashUsed, std::vector<uint256> &vMatch, std::vector<unsigned int> &vnIndex) {
     if (nBitsUsed >= vBits.size()) {
         // overflowed the bits array - failure
         fBad = true;
@@ -110,14 +110,16 @@ uint256 CPartialMerkleTree::TraverseAndExtract(int height, unsigned int pos, uns
             return uint256();
         }
         const uint256 &hash = vHash[nHashUsed++];
-        if (height==0 && fParentOfMatch) // in case of height 0, we have a matched txid
+        if (height==0 && fParentOfMatch) { // in case of height 0, we have a matched txid
             vMatch.push_back(hash);
+            vnIndex.push_back(pos);
+        }
         return hash;
     } else {
         // otherwise, descend into the subtrees to extract matched txids and hashes
-        uint256 left = TraverseAndExtract(height-1, pos*2, nBitsUsed, nHashUsed, vMatch), right;
+        uint256 left = TraverseAndExtract(height-1, pos*2, nBitsUsed, nHashUsed, vMatch, vnIndex), right;
         if (pos*2+1 < CalcTreeWidth(height-1)) {
-            right = TraverseAndExtract(height-1, pos*2+1, nBitsUsed, nHashUsed, vMatch);
+            right = TraverseAndExtract(height-1, pos*2+1, nBitsUsed, nHashUsed, vMatch, vnIndex);
             if (right == left) {
                 // The left and right branches should never be identical, as the transaction
                 // hashes covered by them must each be unique.
@@ -147,7 +149,7 @@ CPartialMerkleTree::CPartialMerkleTree(const std::vector<uint256> &vTxid, const
 
 CPartialMerkleTree::CPartialMerkleTree() : nTransactions(0), fBad(true) {}
 
-uint256 CPartialMerkleTree::ExtractMatches(std::vector<uint256> &vMatch) {
+uint256 CPartialMerkleTree::ExtractMatches(std::vector<uint256> &vMatch, std::vector<unsigned int> &vnIndex) {
     vMatch.clear();
     // An empty set will not work
     if (nTransactions == 0)
@@ -167,7 +169,7 @@ uint256 CPartialMerkleTree::ExtractMatches(std::vector<uint256> &vMatch) {
         nHeight++;
     // traverse the partial tree
     unsigned int nBitsUsed = 0, nHashUsed = 0;
-    uint256 hashMerkleRoot = TraverseAndExtract(nHeight, 0, nBitsUsed, nHashUsed, vMatch);
+    uint256 hashMerkleRoot = TraverseAndExtract(nHeight, 0, nBitsUsed, nHashUsed, vMatch, vnIndex);
     // verify that no problems occurred during the tree traversal
     if (fBad)
         return uint256();