Added LiteMode

LiteMode disables Darksend/Masternodes/InstantX for clients
who want speed and don't need access to these features. UI
for Darksend is also hidden while in this mode.

src/darksend.cpp

@@ -42,6 +42,8 @@ int RequestedMasterNodeList = 0;
 
 void ProcessMessageDarksend(CNode* pfrom, std::string& strCommand, CDataStream& vRecv)
 {
+    if(fLiteMode) return; //disable all darksend/masternode related functionality
+
     if (strCommand == "dsf") { //DarkSend Final tx
         if (pfrom->nVersion < darkSendPool.MIN_PEER_PROTO_VERSION) {
             return;
@@ -579,8 +581,8 @@ void CDarkSendPool::Check()
 
                 if(!darkSendSigner.SetKey(strMasterNodePrivKey, strError, key2, pubkey2))
                 {
-                    LogPrintf("Invalid masternodeprivkey: '%s'\n", strError.c_str());
-                    exit(0);
+                    LogPrintf("CDarkSendPool::Check() - ERROR: Invalid masternodeprivkey: '%s'\n", strError.c_str());
+                    return;
                 }
 
                 if(!darkSendSigner.SignMessage(strMessage, strError, vchSig, key2)) {
@@ -2137,8 +2139,8 @@ bool CDarksendQueue::Sign()
 
     if(!darkSendSigner.SetKey(strMasterNodePrivKey, errorMessage, key2, pubkey2))
     {
-        LogPrintf("Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
-        exit(0);
+        LogPrintf("CDarksendQueue():Relay - ERROR: Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
+        return false;
     }
 
     if(!darkSendSigner.SignMessage(strMessage, errorMessage, vchSig, key2)) {
@@ -2188,6 +2190,8 @@ bool CDarksendQueue::CheckSignature()
 
 void ThreadCheckDarkSendPool()
 {
+    if(fLiteMode) return; //disable all darksend/masternode related functionality
+
     // Make this thread recognisable as the wallet flushing thread
     RenameThread("bitcoin-darksend");
 

src/init.cpp

@@ -1115,8 +1115,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         if(!strMasterNodeAddr.empty()){
             CService addrTest = CService(strMasterNodeAddr);
             if (!addrTest.IsValid()) {
-                printf("Invalid -masternodeaddr address: '%s'\n", mapArgs["-strMasterNodeAddr"].c_str());
-                exit(0);
+                return InitError("Invalid -masternodeaddr address: " + strMasterNodeAddr);
             }
         }
 
@@ -1165,6 +1164,12 @@ bool AppInit2(boost::thread_group& threadGroup)
         nInstantXDepth = 0;
     }
 
+    //lite mode disables all Masternode and Darksend related functionality
+    fLiteMode = GetBoolArg("-litemode", false);
+    if(fMasterNode && fLiteMode){
+        return InitError("You can not start a masternode in litemode");
+    }
+
     LogPrintf("nInstantXDepth %d\n", nInstantXDepth);
     LogPrintf("Darksend rounds %d\n", nDarksendRounds);
     LogPrintf("Anonymize Darkcoin Amount %d\n", nAnonymizeDarkcoinAmount);

src/instantx.cpp

@@ -35,6 +35,7 @@ std::map<uint256, CTransactionLock> mapTxLocks;
 void ProcessMessageInstantX(CNode* pfrom, std::string& strCommand, CDataStream& vRecv)
 {
     return;
+    if(fLiteMode) return; //disable all darksend/masternode related functionality
 
     if (strCommand == "txlreq")
     {
@@ -387,8 +388,8 @@ bool CConsensusVote::Sign()
 
     if(!darkSendSigner.SetKey(strMasterNodePrivKey, errorMessage, key2, pubkey2))
     {
-        LogPrintf("Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
-        exit(0);
+        LogPrintf("CActiveMasternode::RegisterAsMasterNode() - ERROR: Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
+        return false;
     }
 
     CScript pubkey;

src/masternode.cpp

@@ -37,6 +37,8 @@ void ProcessMasternodeConnections(){
 
 void ProcessMessageMasternode(CNode* pfrom, std::string& strCommand, CDataStream& vRecv)
 {
+    if(fLiteMode) return; //disable all darksend/masternode related functionality
+
     if (strCommand == "dsee") { //DarkSend Election Entry
         bool fIsInitialDownload = IsInitialBlockDownload();
         if(fIsInitialDownload) return;
@@ -633,8 +635,8 @@ bool CMasternodePayments::Sign(CMasternodePaymentWinner& winner)
 
     if(!darkSendSigner.SetKey(strMasterPrivKey, errorMessage, key2, pubkey2))
     {
-        LogPrintf("CMasternodePayments::Sign - Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
-        exit(0);
+        LogPrintf("CMasternodePayments::Sign - ERROR: Invalid masternodeprivkey: '%s'\n", errorMessage.c_str());
+        return false;
     }
 
     if(!darkSendSigner.SignMessage(strMessage, errorMessage, winner.vchSig, key2)) {

src/qt/overviewpage.cpp

@@ -121,9 +121,6 @@ OverviewPage::OverviewPage(QWidget *parent) :
 
     connect(ui->listTransactions, SIGNAL(clicked(QModelIndex)), this, SLOT(handleTransactionClicked(QModelIndex)));
 
-    timer = new QTimer(this);
-    connect(timer, SIGNAL(timeout()), this, SLOT(darkSendStatus()));
-    timer->start(333);
 
     // init "out of sync" warning labels
     ui->labelWalletStatus->setText("(" + tr("out of sync") + ")");
@@ -132,7 +129,15 @@ OverviewPage::OverviewPage(QWidget *parent) :
     showingDarkSendMessage = 0;
     darksendActionCheck = 0;
 
-    if(fMasterNode){
+    if(fLiteMode){
+        ui->frameDarksend->setVisible(false);
+    } else {
+        timer = new QTimer(this);
+        connect(timer, SIGNAL(timeout()), this, SLOT(darkSendStatus()));
+        timer->start(333);
+    }
+
+    if(fMasterNode || fLiteMode){
         ui->toggleDarksend->setText("(Disabled)");
         ui->toggleDarksend->setEnabled(false);
     }else if(!fEnableDarksend){

src/util.cpp

@@ -97,6 +97,7 @@ using namespace std;
 bool fMasterNode = false;
 string strMasterNodePrivKey = "";
 string strMasterNodeAddr = "";
+bool fLiteMode = false;
 int nInstantXDepth = 1;
 int nDarksendRounds = 2;
 int nAnonymizeDarkcoinAmount = 1000;

src/util.h

@@ -95,6 +95,7 @@ inline void MilliSleep(int64_t n)
 //Darkcoin only features
 
 extern bool fMasterNode;
+extern bool fLiteMode;
 extern int nInstantXDepth;
 extern int nDarksendRounds;
 extern int nAnonymizeDarkcoinAmount;