From 43b9194d83e7fff4f308562830cae18604d91273 Mon Sep 17 00:00:00 2001
From: celbalrai <80897309+celbalrai@users.noreply.github.com>
Date: Sun, 18 Apr 2021 08:01:54 +0200
Subject: [PATCH] Disable accumulator loading

---
 src/txdb.cpp              |  8 --------
 src/zwgr/accumulators.cpp | 20 --------------------
 src/zwgr/accumulators.h   |  1 -
 3 files changed, 29 deletions(-)

diff --git a/src/txdb.cpp b/src/txdb.cpp
index d5e7a80aa5537b..99d204819aa9fc 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -461,14 +461,6 @@ bool CBlockTreeDB::LoadBlockIndexGuts(const Consensus::Params& consensusParams,
                 if (!IsProofOfStakeHeight(pindexNew->nHeight, consensusParams) && pindexNew->IsProofOfWork() && !CheckProofOfWork(pindexNew->GetBlockHash(), pindexNew->nBits, consensusParams))
                     return error("%s: CheckProofOfWork failed: %s", __func__, pindexNew->ToString());
 
-                //populate accumulator checksum map in memory
-                if(pindexNew->nAccumulatorCheckpoint != uint256() && pindexNew->nAccumulatorCheckpoint != nPreviousCheckpoint) {
-                    //Don't load any checkpoints that exist before v2 zwgr. The accumulator is invalid for v1 and not used.
-                    if (pindexNew->nHeight >= Params().GetConsensus().nBlockZerocoinV2)
-                        LoadAccumulatorValuesFromDB(pindexNew->nAccumulatorCheckpoint);
-
-                    nPreviousCheckpoint = pindexNew->nAccumulatorCheckpoint;
-                }
                 pcursor->Next();
             } else {
                 return error("%s: failed to read value", __func__);
diff --git a/src/zwgr/accumulators.cpp b/src/zwgr/accumulators.cpp
index 1af630a15ddbf1..c910dff69d02de 100644
--- a/src/zwgr/accumulators.cpp
+++ b/src/zwgr/accumulators.cpp
@@ -137,26 +137,6 @@ bool EraseAccumulatorValues(const uint256& nCheckpointErase, const uint256& nChe
     return true;
 }
 
-
-bool LoadAccumulatorValuesFromDB(const uint256 nCheckpoint)
-{
-    for (auto& denomination : libzerocoin::zerocoinDenomList) {
-        uint32_t nChecksum = ParseChecksum(nCheckpoint, denomination);
-
-        //if read is not successful then we are not in a state to verify zerocoin transactions
-        CBigNum bnValue;
-        if (!zerocoinDB->ReadAccumulatorValue(nChecksum, bnValue)) {
-            if (!count(listAccCheckpointsNoDB.begin(), listAccCheckpointsNoDB.end(), nCheckpoint))
-                listAccCheckpointsNoDB.push_back(nCheckpoint);
-            LogPrint(BCLog::ZEROCOIN, "%s : Missing databased value for checksum %d\n", __func__, nChecksum);
-            return false;
-        }
-        mapAccumulatorValues.insert(std::make_pair(nChecksum, bnValue));
-    }
-    return true;
-}
-
-
 //Erase accumulator checkpoints for a certain block range
 bool EraseCheckpoints(int nStartHeight, int nEndHeight)
 {
diff --git a/src/zwgr/accumulators.h b/src/zwgr/accumulators.h
index fc0d894c51840d..d2ded253fce1e9 100644
--- a/src/zwgr/accumulators.h
+++ b/src/zwgr/accumulators.h
@@ -58,7 +58,6 @@ void AddAccumulatorChecksum(const uint32_t nChecksum, const CBigNum &bnValue, bo
 bool CalculateAccumulatorCheckpoint(int nHeight, uint256& nCheckpoint, AccumulatorMap& mapAccumulators);
 bool CalculateAccumulatorCheckpointWithoutDB(int nHeight, uint256& nCheckpoint, AccumulatorMap& mapAccumulators);
 void DatabaseChecksums(AccumulatorMap& mapAccumulators);
-bool LoadAccumulatorValuesFromDB(const uint256 nCheckpoint);
 bool EraseAccumulatorValues(const uint256& nCheckpointErase, const uint256& nCheckpointPrevious);
 uint32_t ParseChecksum(uint256 nChecksum, libzerocoin::CoinDenomination denomination);
 uint32_t GetChecksum(const CBigNum &bnValue);