86 lines
2.6 KiB
Haskell
86 lines
2.6 KiB
Haskell
{- |
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Module : Test.Util
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Maintainer : emi@haskell.fyi
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Description: Utility functions for testing Plutarch scripts with ScriptContext
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-}
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module Test.Util (
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-- * Plutus-land utils
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datumHash,
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toDatum,
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toDatumHash,
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datumPair,
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closedBoundedInterval,
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updateMap,
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) where
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--------------------------------------------------------------------------------
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import Prelude
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--------------------------------------------------------------------------------
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import Codec.Serialise (serialise)
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import Data.ByteString.Lazy qualified as ByteString.Lazy
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--------------------------------------------------------------------------------
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import Plutarch.Crypto (pblake2b_256)
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import Plutus.V1.Ledger.Interval as PlutusTx
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import Plutus.V1.Ledger.Scripts (Datum (Datum), DatumHash (DatumHash))
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import PlutusTx.AssocMap qualified as AssocMap
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import PlutusTx.Builtins qualified as PlutusTx
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import PlutusTx.IsData qualified as PlutusTx
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import PlutusTx.Ord qualified as PlutusTx
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--------------------------------------------------------------------------------
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{- | Create a pair from data for use in 'txInfoData'.
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Example:
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@
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myTxInfo { 'txInfoData' = ['datumPair' myDatum] }
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@
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-}
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datumPair :: PlutusTx.ToData a => a -> (DatumHash, Datum)
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datumPair = (,) <$> toDatumHash <*> toDatum
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-- | Calculate the blake2b-256 hash of a Datum.
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datumHash :: Datum -> DatumHash
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datumHash (Datum data') = toDatumHash data'
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-- | Convenience function to create a Datum from any type that implements ToData.
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toDatum :: PlutusTx.ToData a => a -> Datum
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toDatum = Datum . PlutusTx.toBuiltinData
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{- | Calculate the blake2b-256 hash of any type that implements ToData
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Shamelessly go through plutus.
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-}
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toDatumHash :: PlutusTx.ToData a => a -> DatumHash
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toDatumHash datum =
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DatumHash $
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PlutusTx.toBuiltin $
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plift $
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pblake2b_256
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# pconstant (ByteString.Lazy.toStrict $ serialise $ PlutusTx.toData datum)
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--------------------------------------------------------------------------------
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-- | Create a closed bounded `Interval`.
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closedBoundedInterval :: PlutusTx.Ord a => a -> a -> PlutusTx.Interval a
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closedBoundedInterval from to = PlutusTx.intersection (PlutusTx.from from) (PlutusTx.to to)
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--------------------------------------------------------------------------------
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{- | / O(n) /. The expression @'updateMap' f k v@ will update the value @x@ at key @k@.
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If @f x@ is Nothing, the key-value pair will be deleted from the map, otherwise the
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value will be updated.
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-}
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updateMap :: Eq k => (v -> Maybe v) -> k -> AssocMap.Map k v -> AssocMap.Map k v
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updateMap f k =
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AssocMap.mapMaybeWithKey
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( \k' v ->
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if k' == k
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then f v
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else Just v
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)
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