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Update Carnot-Specs

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mjalalzai 2023-02-28 14:36:45 -08:00 committed by GitHub
parent 842ae09cc2
commit 238e056b05
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1 changed files with 12 additions and 7 deletions
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17
content/roadmap/consensus/candidates/carnot/Carnot-Specs
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@ -16,7 +16,7 @@ Types:
view view
signer signer
signature signature
qc qc #
3: A QC has the following fields: 3: A QC has the following fields:
@ -24,7 +24,7 @@ Types:
view view
signers signers
signature signature
Type Type # Better to have two different types of QCs
4: An aggQC has the following fields: 4: An aggQC has the following fields:
@ -36,7 +36,7 @@ Types:
Local Variables: Local Variables:
highQC highQC
qc_c # QC built from messages received from child committees #qc_c # QC built from messages received from child committees
curView curView
latestCommittedBlock latestCommittedBlock
@ -62,10 +62,10 @@ Utilities:
Func safeBlock(block){ Func safeBlock(block){
# this check makes sure block is not old and the previous leader did not fail # this check makes sure block is not old and the previous leader did not fail
if block.QC != Null{ if block.qc != Null{
return block.view >= curView and block.view == block.qc.block.view + 1 return block.view >= curView and block.view == block.qc.block.view + 1
} }
# this meails previous leader/leaders have failed. But still we need to check if the block is not old and the block extends from a valid ancestor. # this means previous leader/leaders have failed. But still we need to check if the block is not old and the block extends from a valid ancestor.
if block.aggQC != Null{ if block.aggQC != Null{
return block.view >= curView and extends(block, block.aggQC.highQC.block) return block.view >= curView and extends(block, block.aggQC.highQC.block)
@ -77,6 +77,7 @@ Utilities:
parentBlock = block.qc.block parentBlock = block.qc.block
grandparentBlock = parentBlock.qc.block grandparentBlock = parentBlock.qc.block
return parentBlock.view = grandparentBlock.view+1 return parentBlock.view = grandparentBlock.view+1
#update latest committed block
} }
@ -122,7 +123,7 @@ Utilities:
# Previous leader failed # Previous leader failed
if block.aggQC! = Null if block.aggQC! = Null
{ {
block.aggQC.highQC = getMaxViewQC (block.agg_qc.qcs) block.aggQC.highQC = getMaxViewQC (block.aggQC.qcs)
# Since verification of signatures is not included in this psuedocode, it is worth mentioning that here verification of block.aggQC.highQC # Since verification of signatures is not included in this psuedocode, it is worth mentioning that here verification of block.aggQC.highQC
# along with the block.aggQC.signature is suffice. No need to verify each qc inside block.aggQC # along with the block.aggQC.signature is suffice. No need to verify each qc inside block.aggQC
if block.aggQC.highQC.view <= latestCommittedBlock.view {return} if block.aggQC.highQC.view <= latestCommittedBlock.view {return}
@ -131,11 +132,13 @@ Utilities:
if safeBlock(block){ if safeBlock(block){
update_higQC(block.qc, block.aggQC) update_higQC(block.qc, block.aggQC)
if memberOfLeafCommittee(){ send(vote, parentCommittee) if memberOfLeafCommittee(){ send(vote, parentCommittee)
curView++
reset() reset()
tryToCommitGrandParent(block) tryToCommitGrandParent(block)
} }
if onlyOneCommittee(){ if onlyOneCommittee(){
send(vote, leader(view+1)) send(vote, leader(view+1))
curView++
reset() reset()
tryToCommitGrandParent(block) tryToCommitGrandParent(block)
} }
@ -147,6 +150,7 @@ Utilities:
Func receive(vote){ Func receive(vote){
if vote.block missing {download(vote.block)} if vote.block missing {download(vote.block)}
#Make sure block is verified before voting
if vote.block.view < curView - 1{ return} if vote.block.view < curView - 1{ return}
if memberOfInternalComExceptRoot(nodeIndx) { if memberOfInternalComExceptRoot(nodeIndx) {
if childcommittee (vote.signer) { collection[vote.block].append(vote)} if childcommittee (vote.signer) { collection[vote.block].append(vote)}
@ -187,6 +191,7 @@ Utilities:
} }
# Failure Case # Failure Case
Func receive (newView){ Func receive (newView){
if newview.highQC.block missing {download(new_view.high_qc.block)} # download the missing block if newview.highQC.block missing {download(new_view.high_qc.block)} # download the missing block