Align constant names for maximum compact block / blocktxn depth

Author: sipa

qa/rpc-tests/p2p-compactblocks.py

@@ -632,9 +632,9 @@ def test_getblocktxn_handler(self, node, test_node, version):
 
     def test_compactblocks_not_at_tip(self, node, test_node):
         # Test that requesting old compactblocks doesn't work.
-        MAX_CMPCTBLOCK_DEPTH = 6
+        MAX_CMPCTBLOCK_DEPTH = 5
         new_blocks = []
-        for i in range(MAX_CMPCTBLOCK_DEPTH):
+        for i in range(MAX_CMPCTBLOCK_DEPTH + 1):
             test_node.clear_block_announcement()
             new_blocks.append(node.generate(1)[0])
             wait_until(test_node.received_block_announcement, timeout=30)

src/main.cpp

@@ -4878,7 +4878,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
                         // and we don't feel like constructing the object for them, so
                         // instead we respond with the full, non-compact block.
                         bool fPeerWantsWitness = State(pfrom->GetId())->fWantsCmpctWitness;
-                        if (CanDirectFetch(Params().GetConsensus()) && mi->second->nHeight >= chainActive.Height() - 5) {
+                        if (CanDirectFetch(consensusParams) && mi->second->nHeight >= chainActive.Height() - MAX_CMPCTBLOCK_DEPTH) {
                             CBlockHeaderAndShortTxIDs cmpctblock(block, fPeerWantsWitness);
                             pfrom->PushMessageWithFlag(fPeerWantsWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::CMPCTBLOCK, cmpctblock);
                         } else
@@ -5405,8 +5405,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
             return true;
         }
 
-        if (it->second->nHeight < chainActive.Height() - 10) {
-            LogPrint("net", "Peer %d sent us a getblocktxn for a block > 10 deep", pfrom->id);
+        if (it->second->nHeight < chainActive.Height() - MAX_BLOCKTXN_DEPTH) {
+            LogPrint("net", "Peer %d sent us a getblocktxn for a block > %i deep", pfrom->id, MAX_BLOCKTXN_DEPTH);
             return true;
         }
 

src/main.h

@@ -90,6 +90,11 @@ static const unsigned int BLOCK_STALLING_TIMEOUT = 2;
 /** Number of headers sent in one getheaders result. We rely on the assumption that if a peer sends
  *  less than this number, we reached its tip. Changing this value is a protocol upgrade. */
 static const unsigned int MAX_HEADERS_RESULTS = 2000;
+/** Maximum depth of blocks we're willing to serve as compact blocks to peers
+ *  when requested. For older blocks, a regular BLOCK response will be sent. */
+static const int MAX_CMPCTBLOCK_DEPTH = 5;
+/** Maximum depth of blocks we're willing to respond to GETBLOCKTXN requests for. */
+static const int MAX_BLOCKTXN_DEPTH = 10;
 /** Size of the "block download window": how far ahead of our current height do we fetch?
  *  Larger windows tolerate larger download speed differences between peer, but increase the potential
  *  degree of disordering of blocks on disk (which make reindexing and in the future perhaps pruning