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Add functions to convert hashes to and from VRFVerKeyHash #4790

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Dec 9, 2024
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Add functions to convert hashes to and from VRFVerKeyHash #4790

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1 change: 1 addition & 0 deletions libs/cardano-ledger-core/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

## 1.16.0.0

* Add `toVRFVerKeyHash` and `fromVRFVerKeyHash`
* Change lens type of `hkdNOptL`, `ppNOptL`, and `ppuNOptL` to `Word16`
* Add `epochFromSlot`
* Remove usage of a `Reader` monad in `epochInfoEpoch`, `epochInfoFirst` and `epochInfoSize`.
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12 changes: 11 additions & 1 deletion libs/cardano-ledger-core/src/Cardano/Ledger/Keys/Internal.hs
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Expand Up @@ -35,6 +35,8 @@ module Cardano.Ledger.Keys.Internal (
KeyRoleVRF (..),
VRFVerKeyHash (..),
hashVerKeyVRF,
toVRFVerKeyHash,
fromVRFVerKeyHash,

-- * Genesis delegations
GenDelegPair (..),
Expand Down Expand Up @@ -373,4 +375,12 @@ deriving newtype instance Crypto c => Default (VRFVerKeyHash r c)

hashVerKeyVRF ::
Crypto c => VerKeyVRF c -> VRFVerKeyHash (r :: KeyRoleVRF) c
hashVerKeyVRF = VRFVerKeyHash . Hash.castHash . VRF.hashVerKeyVRF
hashVerKeyVRF = toVRFVerKeyHash . VRF.hashVerKeyVRF

toVRFVerKeyHash ::
Hash.Hash (HASH c) (VRF.VerKeyVRF v) -> VRFVerKeyHash (r :: KeyRoleVRF) c
toVRFVerKeyHash = VRFVerKeyHash . Hash.castHash

fromVRFVerKeyHash ::
VRFVerKeyHash (r :: KeyRoleVRF) c -> Hash.Hash (HASH c) (VRF.VerKeyVRF v)
fromVRFVerKeyHash = Hash.castHash . unVRFVerKeyHash
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