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More shelleyBasedEraConstraint constraints #149

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merged 1 commit into from
Jul 31, 2023

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newhoggy
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@newhoggy newhoggy commented Jul 27, 2023

Changelog

- description: |
    More shelleyBasedEraConstraint constraints
  compatibility: compatible
  type: feature

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Checklist

  • Commit sequence broadly makes sense and commits have useful messages
  • The change log section in the PR description has been filled in
  • New tests are added if needed and existing tests are updated. These may include:
    • golden tests
    • property tests
    • roundtrip tests
  • The version bounds in .cabal files are updated
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    • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
  • The changelog section in the PR is updated to describe the change
  • Self-reviewed the diff

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@newhoggy newhoggy force-pushed the newhoggy/more-shelleyBasedEraConstraint-instances branch from e1af137 to 3d1a360 Compare July 27, 2023 23:55
@newhoggy newhoggy changed the title More shelleyBasedEraConstraint instances More shelleyBasedEraConstraint constraints Jul 27, 2023
@newhoggy newhoggy marked this pull request as ready for review July 28, 2023 00:17
@newhoggy newhoggy force-pushed the newhoggy/more-shelleyBasedEraConstraint-instances branch from 3d1a360 to f9d5995 Compare July 28, 2023 00:18
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE UndecidableInstances #-}
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Can we avoid this extension? Why it's needed?

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@newhoggy newhoggy Jul 28, 2023

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This is why we need it:


internal/Cardano/Api/Orphans.hs:97:10: error:
    • Illegal nested constraint ‘ToJSON (HeaderHash blk)’
      (Use UndecidableInstances to permit this)
    • In the instance declaration for ‘ToJSON (Tip blk)’
   |
97 | instance ToJSON (HeaderHash blk) => ToJSON (Tip blk) where
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Note, the offending instance already exists in cardano-cli. This PR merely moves it here.

See https://github.com/input-output-hk/cardano-cli/blob/newhoggy/use-AnyShelleyToBabbageEra-from-cardano-api-instead/cardano-cli/src/Cardano/CLI/Orphans.hs#L48

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Your link returns 404 error for me.

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@newhoggy newhoggy force-pushed the newhoggy/more-shelleyBasedEraConstraint-instances branch from f9d5995 to e667af3 Compare July 29, 2023 04:41
@newhoggy newhoggy added this pull request to the merge queue Jul 31, 2023
Merged via the queue into main with commit 9a2c918 Jul 31, 2023
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@newhoggy newhoggy deleted the newhoggy/more-shelleyBasedEraConstraint-instances branch July 31, 2023 13:42
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2 participants