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Handled pre-round equivocation bug #600

merged 4 commits into from Mar 5, 2019


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gavraz commented Mar 4, 2019

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@@ -29,20 +29,24 @@ func (pre *PreRoundTracker) OnPreRound(msg *pb.HareMessage) {

// only handle first pre-round msg
if _, exist := pre.preRound[verifier.String()]; exist {
var sToTrack *Set = nil

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antonlerner Mar 4, 2019


you can refactor the else using better arrangement of parameters, sToTrack can start with msg.Message.Values as initial value and be modified else

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gavraz Mar 4, 2019

Author Contributor

I think it is a matter of style but do understand it is a more simple and go-idiomatic approach so I changed it to fit the no else and use if for non-happy flows

preRound map[string]struct{} // maps PubKey->Pre-Round msg (unique)
tracker *RefCountTracker // keeps track of seen values
threshold uint32 // the threshold to prove a single value
preRound map[string]*Set // maps PubKey->Pre-Round msg (unique)

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zalmen Mar 4, 2019


I don't understand the comment - what is unique? and should it be Set instead of "Pre-Round msg"?

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zalmen Mar 4, 2019


Also (general comment) - please add tests to test these changes. It is suspicious that you a major logical change in the PreroundTracker without needing to change any of the test code, please make sure that this struct is well tested.

@gavraz gavraz force-pushed the hare_preround_equivocation branch from da60af5 to 30a91b2 Mar 5, 2019


zalmen approved these changes Mar 5, 2019

@gavraz gavraz merged commit 16c8b20 into develop Mar 5, 2019

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continuous-integration/travis-ci/pr The Travis CI build passed

beckmani added a commit that referenced this pull request Mar 7, 2019

Handled pre-round equivocation bug (#600)
* Handled pre-round equivocation bug
* Build certificate only from first f+1 commits
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