Litecoin: Add scrypt N=1024 PoW

1 files changed, 8 insertions, 2 deletions

diff --git a/src/txdb.cpp b/src/txdb.cpp
index 72460e7c6..8f7820bc5 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -271,8 +271,14 @@ bool CBlockTreeDB::LoadBlockIndexGuts(const Consensus::Params& consensusParams,
                 pindexNew->nStatus        = diskindex.nStatus;
                 pindexNew->nTx            = diskindex.nTx;
 
-                if (!CheckProofOfWork(pindexNew->GetBlockHash(), pindexNew->nBits, consensusParams))
-                    return error("%s: CheckProofOfWork failed: %s", __func__, pindexNew->ToString());
+                // Litecoin: Disable PoW Sanity check while loading block index from disk.
+                // We use the sha256 hash for the block index for performance reasons, which is recorded for later use.
+                // CheckProofOfWork() uses the scrypt hash which is discarded after a block is accepted.
+                // While it is technically feasible to verify the PoW, doing so takes several minutes as it
+                // requires recomputing every PoW hash during every Litecoin startup.
+                // We opt instead to simply trust the data that is on your local disk.
+                //if (!CheckProofOfWork(pindexNew->GetBlockHash(), pindexNew->nBits, consensusParams))
+                //    return error("%s: CheckProofOfWork failed: %s", __func__, pindexNew->ToString());
 
                 pcursor->Next();
             } else {