From d4781ac6c26399d316a2b25f656d9a4c0990c419 Mon Sep 17 00:00:00 2001
From: Gregory Sanders <gsanders87@gmail.com>
Date: Mon, 19 Dec 2016 20:50:47 -0500
Subject: Set peers as HB peers upon full block validation

---
 src/net_processing.cpp | 55 +++++++++++++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 27 deletions(-)

(limited to 'src/net_processing.cpp')

diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 87d367c2fb..42c46b7384 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -395,33 +395,38 @@ void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
     }
 }
 
-void MaybeSetPeerAsAnnouncingHeaderAndIDs(const CNodeState* nodestate, CNode* pfrom, CConnman& connman) {
-    if (!nodestate->fSupportsDesiredCmpctVersion) {
+void MaybeSetPeerAsAnnouncingHeaderAndIDs(NodeId nodeid, CConnman& connman) {
+    AssertLockHeld(cs_main);
+    CNodeState* nodestate = State(nodeid);
+    if (!nodestate || !nodestate->fSupportsDesiredCmpctVersion) {
         // Never ask from peers who can't provide witnesses.
         return;
     }
     if (nodestate->fProvidesHeaderAndIDs) {
         for (std::list<NodeId>::iterator it = lNodesAnnouncingHeaderAndIDs.begin(); it != lNodesAnnouncingHeaderAndIDs.end(); it++) {
-            if (*it == pfrom->GetId()) {
+            if (*it == nodeid) {
                 lNodesAnnouncingHeaderAndIDs.erase(it);
-                lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
+                lNodesAnnouncingHeaderAndIDs.push_back(nodeid);
                 return;
             }
         }
-        bool fAnnounceUsingCMPCTBLOCK = false;
-        uint64_t nCMPCTBLOCKVersion = (pfrom->GetLocalServices() & NODE_WITNESS) ? 2 : 1;
-        if (lNodesAnnouncingHeaderAndIDs.size() >= 3) {
-            // As per BIP152, we only get 3 of our peers to announce
-            // blocks using compact encodings.
-            connman.ForNode(lNodesAnnouncingHeaderAndIDs.front(), [&connman, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion](CNode* pnodeStop){
-                connman.PushMessage(pnodeStop, CNetMsgMaker(pnodeStop->GetSendVersion()).Make(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion));
-                return true;
-            });
-            lNodesAnnouncingHeaderAndIDs.pop_front();
-        }
-        fAnnounceUsingCMPCTBLOCK = true;
-        connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion));
-        lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
+        connman.ForNode(nodeid, [&connman](CNode* pfrom){
+            bool fAnnounceUsingCMPCTBLOCK = false;
+            uint64_t nCMPCTBLOCKVersion = (pfrom->GetLocalServices() & NODE_WITNESS) ? 2 : 1;
+            if (lNodesAnnouncingHeaderAndIDs.size() >= 3) {
+                // As per BIP152, we only get 3 of our peers to announce
+                // blocks using compact encodings.
+                connman.ForNode(lNodesAnnouncingHeaderAndIDs.front(), [&connman, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion](CNode* pnodeStop){
+                    connman.PushMessage(pnodeStop, CNetMsgMaker(pnodeStop->GetSendVersion()).Make(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion));
+                    return true;
+                });
+                lNodesAnnouncingHeaderAndIDs.pop_front();
+            }
+            fAnnounceUsingCMPCTBLOCK = true;
+            connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion));
+            lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
+            return true;
+        });
     }
 }
 
@@ -798,6 +803,11 @@ void PeerLogicValidation::BlockChecked(const CBlock& block, const CValidationSta
                 Misbehaving(it->second.first, nDoS);
         }
     }
+    else if (state.IsValid() && !IsInitialBlockDownload() && mapBlocksInFlight.count(hash) == mapBlocksInFlight.size()) {
+        if (it != mapBlockSource.end()) {
+            MaybeSetPeerAsAnnouncingHeaderAndIDs(it->second.first, *connman);
+        }
+    }
     if (it != mapBlockSource.end())
         mapBlockSource.erase(it);
 }
@@ -1853,12 +1863,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
                     return true;
                 }
 
-                if (!fAlreadyInFlight && mapBlocksInFlight.size() == 1 && pindex->pprev->IsValid(BLOCK_VALID_CHAIN)) {
-                    // We seem to be rather well-synced, so it appears pfrom was the first to provide us
-                    // with this block! Let's get them to announce using compact blocks in the future.
-                    MaybeSetPeerAsAnnouncingHeaderAndIDs(nodestate, pfrom, connman);
-                }
-
                 BlockTransactionsRequest req;
                 for (size_t i = 0; i < cmpctblock.BlockTxCount(); i++) {
                     if (!partialBlock.IsTxAvailable(i))
@@ -2143,9 +2147,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
                 }
                 if (vGetData.size() > 0) {
                     if (nodestate->fSupportsDesiredCmpctVersion && vGetData.size() == 1 && mapBlocksInFlight.size() == 1 && pindexLast->pprev->IsValid(BLOCK_VALID_CHAIN)) {
-                        // We seem to be rather well-synced, so it appears pfrom was the first to provide us
-                        // with this block! Let's get them to announce using compact blocks in the future.
-                        MaybeSetPeerAsAnnouncingHeaderAndIDs(nodestate, pfrom, connman);
                         // In any case, we want to download using a compact block, not a regular one
                         vGetData[0] = CInv(MSG_CMPCT_BLOCK, vGetData[0].hash);
                     }
-- 
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