Improve sync (#1779)

* Do not relay `mnp`, `mnb`, `mnw`, `govobj` and `govobjvote` until fully synced

This should massively lower outgoing traffic and load during sync process (especially on mainnet)

* Apply "no sync from me until I'm synced" rule to all nodes

src/governance-object.cpp

@@ -8,6 +8,7 @@
 #include "governance-object.h"
 #include "governance-vote.h"
 #include "instantx.h"
+#include "masternode-sync.h"
 #include "masternodeman.h"
 #include "messagesigner.h"
 #include "util.h"
@@ -651,6 +652,12 @@ bool CGovernanceObject::GetCurrentMNVotes(const COutPoint& mnCollateralOutpoint,
 
 void CGovernanceObject::Relay(CConnman& connman)
 {
+    // Do not relay until fully synced
+    if(!masternodeSync.IsSynced()) {
+        LogPrint("gobject", "CGovernanceObject::Relay -- won't relay until fully synced\n");
+        return;
+    }
+
     CInv inv(MSG_GOVERNANCE_OBJECT, GetHash());
     connman.RelayInv(inv, MIN_GOVERNANCE_PEER_PROTO_VERSION);
 }

src/governance-vote.cpp

@@ -4,6 +4,7 @@
 
 #include "governance-vote.h"
 #include "governance-object.h"
+#include "masternode-sync.h"
 #include "masternodeman.h"
 #include "messagesigner.h"
 #include "util.h"
@@ -226,6 +227,12 @@ CGovernanceVote::CGovernanceVote(COutPoint outpointMasternodeIn, uint256 nParent
 
 void CGovernanceVote::Relay(CConnman& connman) const
 {
+    // Do not relay until fully synced
+    if(!masternodeSync.IsSynced()) {
+        LogPrint("gobject", "CGovernanceVote::Relay -- won't relay until fully synced\n");
+        return;
+    }
+
     CInv inv(MSG_GOVERNANCE_OBJECT_VOTE, GetHash());
     connman.RelayInv(inv, MIN_GOVERNANCE_PEER_PROTO_VERSION);
 }

src/governance.cpp

@@ -740,7 +740,7 @@ void CGovernanceManager::Sync(CNode* pfrom, const uint256& nProp, const CBloomFi
     */
 
     // do not provide any data until our node is synced
-    if(fMasterNode && !masternodeSync.IsSynced()) return;
+    if(!masternodeSync.IsSynced()) return;
 
     int nObjCount = 0;
     int nVoteCount = 0;

src/masternode-payments.cpp

@@ -840,8 +840,12 @@ void CMasternodePayments::CheckPreviousBlockVotes(int nPrevBlockHeight)
 
 void CMasternodePaymentVote::Relay(CConnman& connman)
 {
-    // do not relay until synced
-    if (!masternodeSync.IsWinnersListSynced()) return;
+    // Do not relay until fully synced
+    if(!masternodeSync.IsSynced()) {
+        LogPrint("mnpayments", "CMasternodePayments::Relay -- won't relay until fully synced\n");
+        return;
+    }
+
     CInv inv(MSG_MASTERNODE_PAYMENT_VOTE, GetHash());
     connman.RelayInv(inv);
 }

src/masternode.cpp

@@ -654,6 +654,12 @@ bool CMasternodeBroadcast::CheckSignature(int& nDos)
 
 void CMasternodeBroadcast::Relay(CConnman& connman)
 {
+    // Do not relay until fully synced
+    if(!masternodeSync.IsSynced()) {
+        LogPrint("masternode", "CMasternodeBroadcast::Relay -- won't relay until fully synced\n");
+        return;
+    }
+
     CInv inv(MSG_MASTERNODE_ANNOUNCE, GetHash());
     connman.RelayInv(inv);
 }
@@ -813,6 +819,12 @@ bool CMasternodePing::CheckAndUpdate(CMasternode* pmn, bool fFromNewBroadcast, i
 
 void CMasternodePing::Relay(CConnman& connman)
 {
+    // Do not relay until fully synced
+    if(!masternodeSync.IsSynced()) {
+        LogPrint("masternode", "CMasternodePing::Relay -- won't relay until fully synced\n");
+        return;
+    }
+
     CInv inv(MSG_MASTERNODE_PING, GetHash());
     connman.RelayInv(inv);
 }