Browse Source

Add comment explaining forced processing of compact blocks

Github-Pull: #11458
Rebased-From: 01b52cedd4
tags/v0.15.1
Suhas Daftuar 3 years ago
parent
commit
ffb6ea4e5e
1 changed files with 15 additions and 2 deletions
  1. 15
    2
      src/net_processing.cpp

+ 15
- 2
src/net_processing.cpp View File

@@ -2144,7 +2144,16 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
mapBlockSource.emplace(pblock->GetHash(), std::make_pair(pfrom->GetId(), false));
}
bool fNewBlock = false;
ProcessNewBlock(chainparams, pblock, true, &fNewBlock);
// Setting fForceProcessing to true means that we bypass some of
// our anti-DoS protections in AcceptBlock, which filters
// unrequested blocks that might be trying to waste our resources
// (eg disk space). Because we only try to reconstruct blocks when
// we're close to caught up (via the CanDirectFetch() requirement
// above, combined with the behavior of not requesting blocks until
// we have a chain with at least nMinimumChainWork), and we ignore
// compact blocks with less work than our tip, it is safe to treat
// reconstructed compact blocks as having been requested.
ProcessNewBlock(chainparams, pblock, /*fForceProcessing=*/true, &fNewBlock);
if (fNewBlock) {
pfrom->nLastBlockTime = GetTime();
} else {
@@ -2224,7 +2233,11 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
bool fNewBlock = false;
// Since we requested this block (it was in mapBlocksInFlight), force it to be processed,
// even if it would not be a candidate for new tip (missing previous block, chain not long enough, etc)
ProcessNewBlock(chainparams, pblock, true, &fNewBlock);
// This bypasses some anti-DoS logic in AcceptBlock (eg to prevent
// disk-space attacks), but this should be safe due to the
// protections in the compact block handler -- see related comment
// in compact block optimistic reconstruction handling.
ProcessNewBlock(chainparams, pblock, /*fForceProcessing=*/true, &fNewBlock);
if (fNewBlock) {
pfrom->nLastBlockTime = GetTime();
} else {

Loading…
Cancel
Save