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Add release notes for v4.6.0-1

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Jack Grigg 2022-01-05 20:24:29 +00:00
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doc/release-notes/release-notes-4.6.0-1.md
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`getblocktemplate` regression fix
=================================
We added support for the NU5 consensus rules in v4.5.0, which alters the
block header to contain a `hashBlockCommitments` value instead of the
chain history root. However, the output of `getblocktemplate` wasn't
returning this value; once NU5 activated, the `blockcommitmentshash`
field was being set to "null" (all-zeroes).
In v4.6.0 we added full NU5 support to `getblocktemplate`, by adding a
`defaultroots` field that gave default values for `hashBlockCommitments`
and the components required to derive it. However, in doing so we
introduced a regression in the (now-deprecated) legacy fields, where
prior to NU5 activation they contained nonsense.
This release fixes the output of `getblocktemplate` to have the intended
semantics for all fields:
- The `blockcommitmentshash` and `authdataroot` fields in `defaultroots`
are now omitted from block templates for heights before NU5 activation.
- The legacy fields now always contain the default value to be placed
into the block header (regaining their previous semantics).
Changelog
=========