Only log when zouts exist and less noise to STDOUT by default

src/main.cpp

@@ -4786,15 +4786,17 @@ bool ReceivedBlockTransactions(const CBlock &block, CValidationState& state, CBl
             fprintf(stderr,"%s: tx=%s has zspends=%d zouts=%d\n", __FUNCTION__, tx.GetHash().ToString().c_str(), nShieldedSpends, nShieldedOutputs );
         }
     }
-    fprintf(stderr,"%s: block %s has total zspends=%d zouts=%d\n", __FUNCTION__, block.GetHash().ToString().c_str(), nShieldedSpendsInBlock, nShieldedOutputsInBlock );
+    if (fDebug) {
+        fprintf(stderr,"%s: block %s has total zspends=%d zouts=%d\n", __FUNCTION__, block.GetHash().ToString().c_str(), nShieldedSpendsInBlock, nShieldedOutputsInBlock );
+    }
 
-    pindexNew->nSproutValue = sproutValue;
-    pindexNew->nChainSproutValue = boost::none;
-    pindexNew->nSaplingValue = saplingValue;
+    pindexNew->nSproutValue       = sproutValue;
+    pindexNew->nChainSproutValue  = boost::none;
+    pindexNew->nSaplingValue      = saplingValue;
     pindexNew->nChainSaplingValue = boost::none;
-    pindexNew->nFile = pos.nFile;
-    pindexNew->nDataPos = pos.nPos;
-    pindexNew->nUndoPos = 0;
+    pindexNew->nFile              = pos.nFile;
+    pindexNew->nDataPos           = pos.nPos;
+    pindexNew->nUndoPos           = 0;
     pindexNew->nStatus |= BLOCK_HAVE_DATA;
     pindexNew->RaiseValidity(BLOCK_VALID_TRANSACTIONS);
 

src/wallet/wallet.cpp

@@ -1687,7 +1687,9 @@ std::pair<mapSaplingNoteData_t, SaplingIncomingViewingKeyMap> CWallet::FindMySap
     LOCK(cs_SpendingKeyStore);
     uint256 hash = tx.GetHash();
     uint32_t nZouts = tx.vShieldedOutput.size();
-    LogPrintf("%s: zouts=%d in tx=%s\n",__func__,nZouts, hash.ToString().c_str());
+    if(fDebug && (nZouts > 0)) {
+        LogPrintf("%s: zouts=%d in tx=%s\n",__func__,nZouts, hash.ToString().c_str());
+    }
 
     mapSaplingNoteData_t noteData;
     SaplingIncomingViewingKeyMap viewingKeysToAdd;