[tor-bugs] #11328 [Tor]: Dir auths should compute Guard WFU using the consensus, not private history

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#11328: Dir auths should compute Guard WFU using the consensus, not private history
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 Reporter:  arma      |          Owner:
     Type:  defect    |         Status:  new
 Priority:  normal    |      Milestone:  Tor: 0.2.6.x-final
Component:  Tor       |        Version:
 Keywords:  tor-auth  |  Actual Points:
Parent ID:            |         Points:
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 Currently directory authorities track the presence of each relay and keep
 notes about their view locally. Then when it comes time to vote about
 Guard, they look at their notes and decide what fraction of the past
 interval the relay was up for.

 But it doesn't matter anymore to clients whether the directory authority
 could reach the relay for that time. The question as of the v3 directory
 design is whether the relay was in the consensus.

 So it seems like the directory authorities should be basing their
 measurements off "is it in the consensus this hour".

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11328>
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