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Add module for UTxO type and operations
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| Original file line number | Diff line number | Diff line change |
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| {-# LANGUAGE DerivingStrategies #-} | ||
| {-# LANGUAGE FlexibleContexts #-} | ||
| {-# LANGUAGE GeneralizedNewtypeDeriving #-} | ||
| {-# LANGUAGE ScopedTypeVariables #-} | ||
| {-# LANGUAGE UndecidableInstances #-} | ||
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| module Cardano.Api.Internal.Tx.UTxO where | ||
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| import Cardano.Api.Internal.Eon.ShelleyBasedEra (IsShelleyBasedEra) | ||
| import Cardano.Api.Internal.Eras.Core (IsCardanoEra) | ||
| import Cardano.Api.Internal.Tx.Body (CtxUTxO, TxOut (..)) | ||
| import Cardano.Api.Internal.TxIn (TxIn (..)) | ||
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| import Cardano.Ledger.Babbage () | ||
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| import Data.Aeson (FromJSON (..), ToJSON (..)) | ||
| import qualified Data.Aeson as Aeson | ||
| import qualified Data.Aeson.KeyMap as KeyMap | ||
| import Data.Aeson.Types (Parser) | ||
| import Data.Map (Map) | ||
| import qualified Data.Map as Map | ||
| import Data.Set (Set) | ||
| import Data.Text (Text) | ||
| import GHC.Exts (IsList (..)) | ||
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| newtype UTxO era = UTxO {unUTxO :: Map TxIn (TxOut CtxUTxO era)} | ||
| deriving stock (Eq, Show) | ||
| deriving newtype (Semigroup, Monoid, IsList) | ||
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| instance IsCardanoEra era => ToJSON (UTxO era) where | ||
| toJSON (UTxO m) = toJSON m | ||
| toEncoding (UTxO m) = toEncoding m | ||
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| instance | ||
| IsShelleyBasedEra era | ||
| => FromJSON (UTxO era) | ||
| where | ||
| parseJSON = Aeson.withObject "UTxO" $ \hm -> do | ||
| let l = toList $ KeyMap.toHashMapText hm | ||
| res <- mapM toTxIn l | ||
| pure . UTxO $ Map.fromList res | ||
| where | ||
| toTxIn :: (Text, Aeson.Value) -> Parser (TxIn, TxOut CtxUTxO era) | ||
| toTxIn (txinText, txOutVal) = do | ||
| (,) | ||
| <$> parseJSON (Aeson.String txinText) | ||
| <*> parseJSON txOutVal | ||
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| -- | Infix version of `difference`. | ||
| (\\) :: UTxO era -> UTxO era -> UTxO era | ||
| a \\ b = difference a b | ||
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| -- | Create an empty `UTxO`. | ||
| empty :: UTxO era | ||
| empty = UTxO Map.empty | ||
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| -- | Create a `UTxO` from a single unspent transaction output. | ||
| singleton :: TxIn -> TxOut CtxUTxO era -> UTxO era | ||
| singleton i o = UTxO $ Map.singleton i o | ||
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| -- | Find a 'TxOut' for a given 'TxIn'. | ||
| lookup :: TxIn -> UTxO era -> Maybe (TxOut CtxUTxO era) | ||
| lookup k = Map.lookup k . unUTxO | ||
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| -- | Filter all `TxOut` that satisfy the predicate. | ||
| filter :: (TxOut CtxUTxO era -> Bool) -> UTxO era -> UTxO era | ||
| filter fn = UTxO . Map.filter fn . unUTxO | ||
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| -- | Filter all UTxO to only include 'out's satisfying given predicate. | ||
| filterWithKey :: (TxIn -> TxOut CtxUTxO era -> Bool) -> UTxO era -> UTxO era | ||
| filterWithKey fn = UTxO . Map.filterWithKey fn . unUTxO | ||
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| -- | Get the 'UTxO domain input's set | ||
| inputSet :: UTxO (TxOut CtxUTxO era) -> Set TxIn | ||
| inputSet = Map.keysSet . unUTxO | ||
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| -- | Remove the right hand side from the left hand side. | ||
| difference :: UTxO era -> UTxO era -> UTxO era | ||
| difference a b = UTxO $ Map.difference (unUTxO a) (unUTxO b) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| module Cardano.Api.Tx.UTxO | ||
| ( UTxO.empty | ||
| , UTxO.singleton | ||
| , UTxO.lookup | ||
| , UTxO.filter | ||
| , UTxO.filterWithKey | ||
| , UTxO.inputSet | ||
| , UTxO.difference | ||
| ) | ||
| where | ||
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| import qualified Cardano.Api.Internal.Tx.UTxO as UTxO |