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FIP-0086: Specify power table scaling & comm tree #983

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merged 4 commits into from
Apr 11, 2024
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This patch specifies the power table scaling discussed in our standups, scaling power between zero and 0xFFFF. I've also been careful to specify the correct inequalities and rounding.

(honestly, all this would be better specified as pseudo-python)

  • I've added a Commitments field to the TipSet object, which we'll leave empty for now, but we'll eventually fill with a Commitments Merkle Tree.
  • I did not end up removing the PowerTable from the TipSet object because it makes it possible to validate a Finality Certificate without having to look at the Commitments tree at all.

I've left the PowerTable directly in the struct for convenience. It also
means we can reduce scope and punt the commitment tree specifics into
the future.

I've also:

1. Redefined the Tipset as a list of CIDs.
2. Clarified that the power table is a bare CBOR list (no wrapping
structure).
This patch specifies the power table scaling discussed in our standups,
scaling power between zero and 0xFFFF. I've also been careful to specify
the correct inequalities and rounding.

Honestly, all this would be better specified as pseudo-Python.
@@ -270,17 +270,16 @@ type Payload struct {
}

type ECTipset struct {
Epoch int
Epoch uint64
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drive by

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@kaitlin-beegle kaitlin-beegle left a comment

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Approved from an editorial perspective. Needs technical review.

@jsoares jsoares changed the title FIP0083: Specify power table scaling & comm tree FIP-0086: Specify power table scaling & comm tree Apr 5, 2024
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A couple of typos; looks good otherwise. Also fixed the title.

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Co-authored-by: Jorge M. Soares <547492+jsoares@users.noreply.github.com>
@anorth anorth merged commit 75c550d into master Apr 11, 2024
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@anorth anorth deleted the steb/power-table branch April 11, 2024 13:49
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4 participants