Use CValidationInterface from chain logic to notify peer logic

This adds a new CValidationInterface subclass, defined in main.h,
to receive notifications of UpdatedBlockTip and use that to push
blocks to peers, instead of doing it directly from
ActivateBestChain.

1 files changed, 32 insertions, 24 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 2eb641e543..e042a73822 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3073,30 +3073,6 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
         if (pindexFork != pindexNewTip) {
             uiInterface.NotifyBlockTip(fInitialDownload, pindexNewTip);
 
-            if (!fInitialDownload) {
-                // Find the hashes of all blocks that weren't previously in the best chain.
-                std::vector<uint256> vHashes;
-                CBlockIndex *pindexToAnnounce = pindexNewTip;
-                while (pindexToAnnounce != pindexFork) {
-                    vHashes.push_back(pindexToAnnounce->GetBlockHash());
-                    pindexToAnnounce = pindexToAnnounce->pprev;
-                    if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
-                        // Limit announcements in case of a huge reorganization.
-                        // Rely on the peer's synchronization mechanism in that case.
-                        break;
-                    }
-                }
-                // Relay inventory, but don't relay old inventory during initial block download.
-                if(connman) {
-                    connman->ForEachNode([nNewHeight, &vHashes](CNode* pnode) {
-                        if (nNewHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 0)) {
-                            BOOST_REVERSE_FOREACH(const uint256& hash, vHashes) {
-                                pnode->PushBlockHash(hash);
-                            }
-                        }
-                    });
-                }
-            }
             // Notify external listeners about the new tip.
             GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
         }
@@ -4684,6 +4660,38 @@ std::string GetWarnings(const std::string& strFor)
 
 //////////////////////////////////////////////////////////////////////////////
 //
+// blockchain -> download logic notification
+//
+
+void PeerLogicValidation::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) {
+    const int nNewHeight = pindexNew->nHeight;
+
+    if (!fInitialDownload) {
+        // Find the hashes of all blocks that weren't previously in the best chain.
+        std::vector<uint256> vHashes;
+        const CBlockIndex *pindexToAnnounce = pindexNew;
+        while (pindexToAnnounce != pindexFork) {
+            vHashes.push_back(pindexToAnnounce->GetBlockHash());
+            pindexToAnnounce = pindexToAnnounce->pprev;
+            if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
+                // Limit announcements in case of a huge reorganization.
+                // Rely on the peer's synchronization mechanism in that case.
+                break;
+            }
+        }
+        // Relay inventory, but don't relay old inventory during initial block download.
+        connman->ForEachNode([nNewHeight, &vHashes](CNode* pnode) {
+            if (nNewHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 0)) {
+                BOOST_REVERSE_FOREACH(const uint256& hash, vHashes) {
+                    pnode->PushBlockHash(hash);
+                }
+            }
+        });
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+//
 // Messages
 //