From bb240e290b71d4dbba7f40e6eaa364df1642297c Mon Sep 17 00:00:00 2001
From: Brannon King <countprimes@gmail.com>
Date: Tue, 10 Dec 2019 22:43:07 -0700
Subject: [PATCH] fixed the txindex data

---
 src/txdb.cpp       |  1 +
 src/validation.cpp | 10 ++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/txdb.cpp b/src/txdb.cpp
index 9abacfb5a..9746bf84a 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -372,6 +372,7 @@ bool CBlockTreeDB::LoadBlockIndexGuts(const Consensus::Params& consensusParams,
 }
 
 bool CBlockTreeDB::WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos>> &list) {
+    if (list.empty()) return true;
     db << "begin";
     auto query = db << "INSERT OR REPLACE INTO tx_to_block VALUES(?,?,?,?)";
     for (auto& kvp: list) {
diff --git a/src/validation.cpp b/src/validation.cpp
index 8f431db5b..6c1de96c0 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2088,10 +2088,12 @@ bool CChainState::ConnectBlock(const CBlock& block, CValidationState& state, CBl
     if (fJustCheck)
         return true;
 
-    if (pindex->pprev != nullptr &&
-        !WriteUndoDataForBlock(blockundo, state, pindex, chainparams) &&
-        !pblocktree->WriteTxIndex(vPos))
-        return false;
+    if (pindex->pprev != nullptr) {
+        if (!WriteUndoDataForBlock(blockundo, state, pindex, chainparams))
+            return error("Unable to write to the Undo data block");
+        if (!pblocktree->WriteTxIndex(vPos))
+            return error("Unable to write to the TX Index");
+    }
 
     if (!pindex->IsValid(BLOCK_VALID_SCRIPTS)) {
         pindex->RaiseValidity(BLOCK_VALID_SCRIPTS);