From 75c22ceda1766f8b64ca68f3b66204030b7a5d37 Mon Sep 17 00:00:00 2001
From: Neil <neil@qtum.org>
Date: Mon, 6 Aug 2018 23:53:27 +0000
Subject: [PATCH] Fix waitforlogs rpc call bug

---
 src/rpc/blockchain.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index de22453b7e..9e94860b16 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1359,8 +1359,16 @@ UniValue waitforlogs(const JSONRPCRequest& request_) {
 
     UniValue jsonLogs(UniValue::VARR);
 
+    std::set<uint256> dupes;
+
     for (const auto& txHashes : hashesToBlock) {
         for (const auto& txHash : txHashes) {
+
+            if(dupes.find(txHash) != dupes.end()) {
+                continue;
+            }
+            dupes.insert(txHash);
+
             std::vector<TransactionReceiptInfo> receipts = pstorageresult->getResult(
                     uintToh256(txHash));