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Perform side-chain check earlier to avoid IBD start

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This commit is contained in:
msutton 2022-03-08 09:18:24 +02:00
parent 7c327683d3
commit 09cebe6960
1 changed files with 20 additions and 23 deletions
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43
app/protocol/flows/v4/blockrelay/ibd.go
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@ -66,6 +66,26 @@ func (flow *handleIBDFlow) start() error {
}
func (flow *handleIBDFlow) runIBDIfNotRunning(block *externalapi.DomainBlock) error {
// Temp code to avoid IBD from lagging nodes publishing there side-chain
virtualSelectedParent, err := flow.Domain().Consensus().GetVirtualSelectedParent()
if err == nil {
virtualSelectedParentHeader, err := flow.Domain().Consensus().GetBlockHeader(virtualSelectedParent)
if err == nil {
if virtualSelectedParentHeader.DAAScore() > block.Header.DAAScore()+2641 {
virtualDifficulty := difficulty.CalcWork(virtualSelectedParentHeader.Bits())
var virtualSub, difficultyMul big.Int
if difficultyMul.Mul(virtualDifficulty, big.NewInt(180)).
Cmp(virtualSub.Sub(virtualSelectedParentHeader.BlueWork(), block.Header.BlueWork())) < 0 {
log.Criticalf("Avoiding IBD because it is coming from a deep (%d DAA score depth) "+
"side-chain which has much lower blue work (%d, %d)",
virtualSelectedParentHeader.DAAScore()-block.Header.DAAScore(),
virtualSelectedParentHeader.BlueWork(), block.Header.BlueWork())
return nil
}
}
}
}
wasIBDNotRunning := flow.TrySetIBDRunning(flow.peer)
if !wasIBDNotRunning {
log.Debugf("IBD is already running")
@ -88,29 +108,6 @@ func (flow *handleIBDFlow) runIBDIfNotRunning(block *externalapi.DomainBlock) er
}
log.Criticalf("Found highest shared chain block %s with peer %s", highestSharedBlockHash, flow.peer)
if highestSharedBlockFound {
virtualSelectedParent, err := flow.Domain().Consensus().GetVirtualSelectedParent()
if err != nil {
return err
}
virtualSelectedParentHeader, err := flow.Domain().Consensus().GetBlockHeader(virtualSelectedParent)
if err != nil {
return err
}
if virtualSelectedParentHeader.DAAScore() > block.Header.DAAScore()+2641*3 {
virtualDifficulty := difficulty.CalcWork(virtualSelectedParentHeader.Bits())
var virtualSub, difficultyMul big.Int
if difficultyMul.Mul(virtualDifficulty, big.NewInt(180)).
Cmp(virtualSub.Sub(virtualSelectedParentHeader.BlueWork(), block.Header.BlueWork())) < 0 {
log.Criticalf("Stopped IBD because it is coming from a deep (%d DAA score depth) "+
"side-chain which split at %s and has lower blue work (%d, %d)",
virtualSelectedParentHeader.DAAScore()-block.Header.DAAScore(),
highestSharedBlockHash, virtualSelectedParentHeader.BlueWork(), block.Header.BlueWork())
return nil
}
}
}
shouldDownloadHeadersProof, shouldSync, err := flow.shouldSyncAndShouldDownloadHeadersProof(block, highestSharedBlockFound)
if err != nil {
return err