From a40f0b0f19d281a3c189875781e50c90a3b61e5c Mon Sep 17 00:00:00 2001
From: "Jonathan \"Duke\" Leto" <jonathan@leto.net>
Date: Thu, 14 Nov 2019 14:26:31 -0800
Subject: [PATCH] Delete sprout code from HaveJoinSplitRequirements and log
 reasons for failing reqs to stderr

---
 src/coins.cpp | 31 ++-----------------------------
 1 file changed, 2 insertions(+), 29 deletions(-)

diff --git a/src/coins.cpp b/src/coins.cpp
index eac89c030..167120bbd 100644
--- a/src/coins.cpp
+++ b/src/coins.cpp
@@ -622,41 +622,14 @@ CAmount CCoinsViewCache::GetValueIn(int32_t nHeight,int64_t *interestp,const CTr
 
 bool CCoinsViewCache::HaveJoinSplitRequirements(const CTransaction& tx) const
 {
-    boost::unordered_map<uint256, SproutMerkleTree, CCoinsKeyHasher> intermediates;
-
-    BOOST_FOREACH(const JSDescription &joinsplit, tx.vjoinsplit)
-    {
-        BOOST_FOREACH(const uint256& nullifier, joinsplit.nullifiers)
-        {
-            if (GetNullifier(nullifier, SPROUT)) {
-                // If the nullifier is set, this transaction
-                // double-spends!
-                return false;
-            }
-        }
-
-        SproutMerkleTree tree;
-        auto it = intermediates.find(joinsplit.anchor);
-        if (it != intermediates.end()) {
-            tree = it->second;
-        } else if (!GetSproutAnchorAt(joinsplit.anchor, tree)) {
-            return false;
-        }
-
-        BOOST_FOREACH(const uint256& commitment, joinsplit.commitments)
-        {
-            tree.append(commitment);
-        }
-
-        intermediates.insert(std::make_pair(tree.root(), tree));
-    }
-
     for (const SpendDescription &spendDescription : tx.vShieldedSpend) {
         if (GetNullifier(spendDescription.nullifier, SAPLING)) // Prevent double spends
+            fprintf(stderr,"%s: sapling nullifier %s exists, preventing double spend\n", __FUNCTION__, spendDescription.nullifier);
             return false;
 
         SaplingMerkleTree tree;
         if (!GetSaplingAnchorAt(spendDescription.anchor, tree)) {
+            fprintf(stderr,"%s: missing sapling anchor: %s \n", __FUNCTION__, spendDescription.anchor);
             return false;
         }
     }