[tor-commits] [torspec] branch main updated: rend-spec-v3: Clarify how the time period offset is computed.

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dgoulet pushed a commit to branch main
in repository torspec.

The following commit(s) were added to refs/heads/main by this push:
     new 5e86477  rend-spec-v3: Clarify how the time period offset is computed.
5e86477 is described below

commit 5e864771d1f3245a7421d0502e285d134bcb1497
Author: Nick Mathewson <nickm at torproject.org>
AuthorDate: Tue Jan 24 15:17:54 2023 -0500

    rend-spec-v3: Clarify how the time period offset is computed.
    
    Based on this email thread with dgoulet:
    
    https://lists.torproject.org/pipermail/tor-dev/2023-January/014808.html
---
 rend-spec-v3.txt | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/rend-spec-v3.txt b/rend-spec-v3.txt
index 278c1fa..e22b690 100644
--- a/rend-spec-v3.txt
+++ b/rend-spec-v3.txt
@@ -743,10 +743,11 @@ Table of contents:
 
    Time periods start at the Unix epoch (Jan 1, 1970), and are computed by
    taking the number of minutes since the epoch and dividing by the time
-   period. However, we want our time periods to start at 12:00UTC every day, so
-   we subtract a "rotation time offset" of 12*60 minutes from the number of
-   minutes since the epoch, before dividing by the time period (effectively
-   making "our" epoch start at Jan 1, 1970 12:00UTC).
+   period. However, we want our time periods to start at a regular offset
+   from the SRV voting schedule, so  we subtract a "rotation time offset"
+   of 12 voting periods from the number of minutes since the epoch, before
+   dividing by the time period (effectively making "our" epoch start at Jan
+   1, 1970 12:00UTC when the voting period is 1 hour.)
 
    Example: If the current time is 2016-04-13 11:15:01 UTC, making the seconds
    since the epoch 1460546101, and the number of minutes since the epoch

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