-- editorconfig-checker-disable-file
{-# LANGUAGE DerivingVia       #-}
{-# LANGUAGE NamedFieldPuns    #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TemplateHaskell   #-}
{-# LANGUAGE ViewPatterns      #-}

{-# OPTIONS_GHC -Wno-simplifiable-class-constraints #-}
{-# OPTIONS_GHC -fno-specialise #-}
{-# OPTIONS_GHC -fno-omit-interface-pragmas #-}

module PlutusLedgerApi.V1.Data.Contexts
    (
    -- * Pending transactions and related types
      TxInfo(..)
    , ScriptContext(..)
    , ScriptPurpose(..)
    , TxId (..)
    , TxOut(..)
    , TxOutRef(..)
    , TxInInfo(..)
    , findOwnInput
    , findDatum
    , findDatumHash
    , findTxInByTxOutRef
    , findContinuingOutputs
    , getContinuingOutputs
    -- * Validator functions
    , pubKeyOutputsAt
    , valuePaidTo
    , spendsOutput
    , txSignedBy
    , valueSpent
    , valueProduced
    , ownCurrencySymbol
    ) where

import GHC.Generics (Generic)
import PlutusTx
import PlutusTx.Data.List (List)
import PlutusTx.Data.List qualified as Data.List
import PlutusTx.Prelude
import Prettyprinter
import Prettyprinter.Extras

import PlutusLedgerApi.V1.Address (Address (..))
import PlutusLedgerApi.V1.Credential (Credential (..), StakingCredential)
import PlutusLedgerApi.V1.Crypto (PubKeyHash (..))
import PlutusLedgerApi.V1.Data.Tx (TxId (..), TxOut (..), TxOutRef (..))
import PlutusLedgerApi.V1.Data.Value (CurrencySymbol (..), Value)
import PlutusLedgerApi.V1.DCert (DCert (..))
import PlutusLedgerApi.V1.Scripts
import PlutusLedgerApi.V1.Time (POSIXTimeRange)
import Prelude qualified as Haskell

{- Note [Script types in pending transactions]
To validate a transaction, we have to evaluate the validation script of each of
the transaction's inputs. The validation script sees the data of the
transaction output it validates, and the redeemer of the transaction input of
the transaction that consumes it.
In addition, the validation script also needs information on the transaction as
a whole (not just the output-input pair it is concerned with). This information
is provided by the `TxInfo` type. A `TxInfo` contains the hashes of
redeemer and data scripts of all of its inputs and outputs.
-}

-- | An input of a pending transaction.
data TxInInfo = TxInInfo
    { TxInInfo -> TxOutRef
txInInfoOutRef   :: TxOutRef
    , TxInInfo -> TxOut
txInInfoResolved :: TxOut
    } deriving stock ((forall x. TxInInfo -> Rep TxInInfo x)
-> (forall x. Rep TxInInfo x -> TxInInfo) -> Generic TxInInfo
forall x. Rep TxInInfo x -> TxInInfo
forall x. TxInInfo -> Rep TxInInfo x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cfrom :: forall x. TxInInfo -> Rep TxInInfo x
from :: forall x. TxInInfo -> Rep TxInInfo x
$cto :: forall x. Rep TxInInfo x -> TxInInfo
to :: forall x. Rep TxInInfo x -> TxInInfo
Generic, Int -> TxInInfo -> ShowS
[TxInInfo] -> ShowS
TxInInfo -> String
(Int -> TxInInfo -> ShowS)
-> (TxInInfo -> String) -> ([TxInInfo] -> ShowS) -> Show TxInInfo
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
$cshowsPrec :: Int -> TxInInfo -> ShowS
showsPrec :: Int -> TxInInfo -> ShowS
$cshow :: TxInInfo -> String
show :: TxInInfo -> String
$cshowList :: [TxInInfo] -> ShowS
showList :: [TxInInfo] -> ShowS
Haskell.Show, TxInInfo -> TxInInfo -> Bool
(TxInInfo -> TxInInfo -> Bool)
-> (TxInInfo -> TxInInfo -> Bool) -> Eq TxInInfo
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: TxInInfo -> TxInInfo -> Bool
== :: TxInInfo -> TxInInfo -> Bool
$c/= :: TxInInfo -> TxInInfo -> Bool
/= :: TxInInfo -> TxInInfo -> Bool
Haskell.Eq)

makeLift ''TxInInfo
makeIsDataIndexed ''TxInInfo [('TxInInfo,0)]

instance Eq TxInInfo where
    TxInInfo TxOutRef
ref TxOut
res == :: TxInInfo -> TxInInfo -> Bool
== TxInInfo TxOutRef
ref' TxOut
res' = TxOutRef
ref TxOutRef -> TxOutRef -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef
ref' Bool -> Bool -> Bool
&& TxOut
res TxOut -> TxOut -> Bool
forall a. Eq a => a -> a -> Bool
== TxOut
res'

instance Pretty TxInInfo where
    pretty :: forall ann. TxInInfo -> Doc ann
pretty TxInInfo{TxOutRef
txInInfoOutRef :: TxInInfo -> TxOutRef
txInInfoOutRef :: TxOutRef
txInInfoOutRef, TxOut
txInInfoResolved :: TxInInfo -> TxOut
txInInfoResolved :: TxOut
txInInfoResolved} =
        TxOutRef -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. TxOutRef -> Doc ann
pretty TxOutRef
txInInfoOutRef Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> Doc ann
"->" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> TxOut -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. TxOut -> Doc ann
pretty TxOut
txInInfoResolved

-- | Purpose of the script that is currently running
data ScriptPurpose
    = Minting CurrencySymbol
    | Spending TxOutRef
    | Rewarding StakingCredential
    | Certifying DCert
    deriving stock ((forall x. ScriptPurpose -> Rep ScriptPurpose x)
-> (forall x. Rep ScriptPurpose x -> ScriptPurpose)
-> Generic ScriptPurpose
forall x. Rep ScriptPurpose x -> ScriptPurpose
forall x. ScriptPurpose -> Rep ScriptPurpose x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cfrom :: forall x. ScriptPurpose -> Rep ScriptPurpose x
from :: forall x. ScriptPurpose -> Rep ScriptPurpose x
$cto :: forall x. Rep ScriptPurpose x -> ScriptPurpose
to :: forall x. Rep ScriptPurpose x -> ScriptPurpose
Generic, Int -> ScriptPurpose -> ShowS
[ScriptPurpose] -> ShowS
ScriptPurpose -> String
(Int -> ScriptPurpose -> ShowS)
-> (ScriptPurpose -> String)
-> ([ScriptPurpose] -> ShowS)
-> Show ScriptPurpose
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
$cshowsPrec :: Int -> ScriptPurpose -> ShowS
showsPrec :: Int -> ScriptPurpose -> ShowS
$cshow :: ScriptPurpose -> String
show :: ScriptPurpose -> String
$cshowList :: [ScriptPurpose] -> ShowS
showList :: [ScriptPurpose] -> ShowS
Haskell.Show, ScriptPurpose -> ScriptPurpose -> Bool
(ScriptPurpose -> ScriptPurpose -> Bool)
-> (ScriptPurpose -> ScriptPurpose -> Bool) -> Eq ScriptPurpose
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: ScriptPurpose -> ScriptPurpose -> Bool
== :: ScriptPurpose -> ScriptPurpose -> Bool
$c/= :: ScriptPurpose -> ScriptPurpose -> Bool
/= :: ScriptPurpose -> ScriptPurpose -> Bool
Haskell.Eq)
    deriving (forall ann. ScriptPurpose -> Doc ann)
-> (forall ann. [ScriptPurpose] -> Doc ann) -> Pretty ScriptPurpose
forall ann. [ScriptPurpose] -> Doc ann
forall ann. ScriptPurpose -> Doc ann
forall a.
(forall ann. a -> Doc ann)
-> (forall ann. [a] -> Doc ann) -> Pretty a
$cpretty :: forall ann. ScriptPurpose -> Doc ann
pretty :: forall ann. ScriptPurpose -> Doc ann
$cprettyList :: forall ann. [ScriptPurpose] -> Doc ann
prettyList :: forall ann. [ScriptPurpose] -> Doc ann
Pretty via (PrettyShow ScriptPurpose)

makeLift ''ScriptPurpose
makeIsDataIndexed ''ScriptPurpose
    [ ('Minting,0)
    , ('Spending,1)
    , ('Rewarding,2)
    , ('Certifying,3)
    ]

instance Eq ScriptPurpose where
    {-# INLINABLE (==) #-}
    Minting CurrencySymbol
cs == :: ScriptPurpose -> ScriptPurpose -> Bool
== Minting CurrencySymbol
cs'           = CurrencySymbol
cs CurrencySymbol -> CurrencySymbol -> Bool
forall a. Eq a => a -> a -> Bool
== CurrencySymbol
cs'
    Spending TxOutRef
ref == Spending TxOutRef
ref'       = TxOutRef
ref TxOutRef -> TxOutRef -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef
ref'
    Rewarding StakingCredential
sc == Rewarding StakingCredential
sc'       = StakingCredential
sc StakingCredential -> StakingCredential -> Bool
forall a. Eq a => a -> a -> Bool
== StakingCredential
sc'
    Certifying DCert
cert == Certifying DCert
cert' = DCert
cert DCert -> DCert -> Bool
forall a. Eq a => a -> a -> Bool
== DCert
cert'
    ScriptPurpose
_ == ScriptPurpose
_                              = Bool
False

-- | A pending transaction. This is the view as seen by validator scripts, so some details are stripped out.
data TxInfo = TxInfo
    { TxInfo -> List TxInInfo
txInfoInputs      :: List TxInInfo -- ^ Transaction inputs; cannot be an empty list
    , TxInfo -> List TxOut
txInfoOutputs     :: List TxOut -- ^ Transaction outputs
    , TxInfo -> Value
txInfoFee         :: Value -- ^ The fee paid by this transaction.
    , TxInfo -> Value
txInfoMint        :: Value -- ^ The 'Value' minted by this transaction.
    , TxInfo -> List DCert
txInfoDCert       :: List DCert -- ^ Digests of certificates included in this transaction
    -- TODO: is this a map? is this a list?
    , TxInfo -> [(StakingCredential, Integer)]
txInfoWdrl        :: [(StakingCredential, Integer)] -- ^ Withdrawals
    , TxInfo -> POSIXTimeRange
txInfoValidRange  :: POSIXTimeRange -- ^ The valid range for the transaction.
    , TxInfo -> List PubKeyHash
txInfoSignatories :: List PubKeyHash -- ^ Signatures provided with the transaction, attested that they all signed the tx
    -- TODO: is this a map? is this a list?
    , TxInfo -> [(DatumHash, Datum)]
txInfoData        :: [(DatumHash, Datum)] -- ^ The lookup table of datums attached to the transaction
    , TxInfo -> TxId
txInfoId          :: TxId  -- ^ Hash of the pending transaction body (i.e. transaction excluding witnesses)
    } deriving stock ((forall x. TxInfo -> Rep TxInfo x)
-> (forall x. Rep TxInfo x -> TxInfo) -> Generic TxInfo
forall x. Rep TxInfo x -> TxInfo
forall x. TxInfo -> Rep TxInfo x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cfrom :: forall x. TxInfo -> Rep TxInfo x
from :: forall x. TxInfo -> Rep TxInfo x
$cto :: forall x. Rep TxInfo x -> TxInfo
to :: forall x. Rep TxInfo x -> TxInfo
Generic, Int -> TxInfo -> ShowS
[TxInfo] -> ShowS
TxInfo -> String
(Int -> TxInfo -> ShowS)
-> (TxInfo -> String) -> ([TxInfo] -> ShowS) -> Show TxInfo
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
$cshowsPrec :: Int -> TxInfo -> ShowS
showsPrec :: Int -> TxInfo -> ShowS
$cshow :: TxInfo -> String
show :: TxInfo -> String
$cshowList :: [TxInfo] -> ShowS
showList :: [TxInfo] -> ShowS
Haskell.Show, TxInfo -> TxInfo -> Bool
(TxInfo -> TxInfo -> Bool)
-> (TxInfo -> TxInfo -> Bool) -> Eq TxInfo
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: TxInfo -> TxInfo -> Bool
== :: TxInfo -> TxInfo -> Bool
$c/= :: TxInfo -> TxInfo -> Bool
/= :: TxInfo -> TxInfo -> Bool
Haskell.Eq)

makeLift ''TxInfo
makeIsDataIndexed ''TxInfo [('TxInfo,0)]

instance Eq TxInfo where
    {-# INLINABLE (==) #-}
    TxInfo List TxInInfo
i List TxOut
o Value
f Value
m List DCert
c [(StakingCredential, Integer)]
w POSIXTimeRange
r List PubKeyHash
s [(DatumHash, Datum)]
d TxId
tid == :: TxInfo -> TxInfo -> Bool
== TxInfo List TxInInfo
i' List TxOut
o' Value
f' Value
m' List DCert
c' [(StakingCredential, Integer)]
w' POSIXTimeRange
r' List PubKeyHash
s' [(DatumHash, Datum)]
d' TxId
tid' =
        List TxInInfo
i List TxInInfo -> List TxInInfo -> Bool
forall a. Eq a => a -> a -> Bool
== List TxInInfo
i' Bool -> Bool -> Bool
&& List TxOut
o List TxOut -> List TxOut -> Bool
forall a. Eq a => a -> a -> Bool
== List TxOut
o' Bool -> Bool -> Bool
&& Value
f Value -> Value -> Bool
forall a. Eq a => a -> a -> Bool
== Value
f' Bool -> Bool -> Bool
&& Value
m Value -> Value -> Bool
forall a. Eq a => a -> a -> Bool
== Value
m' Bool -> Bool -> Bool
&& List DCert
c List DCert -> List DCert -> Bool
forall a. Eq a => a -> a -> Bool
== List DCert
c' Bool -> Bool -> Bool
&& [(StakingCredential, Integer)]
w [(StakingCredential, Integer)]
-> [(StakingCredential, Integer)] -> Bool
forall a. Eq a => a -> a -> Bool
== [(StakingCredential, Integer)]
w' Bool -> Bool -> Bool
&& POSIXTimeRange
r POSIXTimeRange -> POSIXTimeRange -> Bool
forall a. Eq a => a -> a -> Bool
== POSIXTimeRange
r' Bool -> Bool -> Bool
&& List PubKeyHash
s List PubKeyHash -> List PubKeyHash -> Bool
forall a. Eq a => a -> a -> Bool
== List PubKeyHash
s' Bool -> Bool -> Bool
&& [(DatumHash, Datum)]
d [(DatumHash, Datum)] -> [(DatumHash, Datum)] -> Bool
forall a. Eq a => a -> a -> Bool
== [(DatumHash, Datum)]
d' Bool -> Bool -> Bool
&& TxId
tid TxId -> TxId -> Bool
forall a. Eq a => a -> a -> Bool
== TxId
tid'

instance Pretty TxInfo where
    pretty :: forall ann. TxInfo -> Doc ann
pretty TxInfo{List TxInInfo
txInfoInputs :: TxInfo -> List TxInInfo
txInfoInputs :: List TxInInfo
txInfoInputs, List TxOut
txInfoOutputs :: TxInfo -> List TxOut
txInfoOutputs :: List TxOut
txInfoOutputs, Value
txInfoFee :: TxInfo -> Value
txInfoFee :: Value
txInfoFee, Value
txInfoMint :: TxInfo -> Value
txInfoMint :: Value
txInfoMint, List DCert
txInfoDCert :: TxInfo -> List DCert
txInfoDCert :: List DCert
txInfoDCert, [(StakingCredential, Integer)]
txInfoWdrl :: TxInfo -> [(StakingCredential, Integer)]
txInfoWdrl :: [(StakingCredential, Integer)]
txInfoWdrl, POSIXTimeRange
txInfoValidRange :: TxInfo -> POSIXTimeRange
txInfoValidRange :: POSIXTimeRange
txInfoValidRange, List PubKeyHash
txInfoSignatories :: TxInfo -> List PubKeyHash
txInfoSignatories :: List PubKeyHash
txInfoSignatories, [(DatumHash, Datum)]
txInfoData :: TxInfo -> [(DatumHash, Datum)]
txInfoData :: [(DatumHash, Datum)]
txInfoData, TxId
txInfoId :: TxInfo -> TxId
txInfoId :: TxId
txInfoId} =
        [Doc ann] -> Doc ann
forall ann. [Doc ann] -> Doc ann
vsep
            [ Doc ann
"TxId:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> TxId -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. TxId -> Doc ann
pretty TxId
txInfoId
            , Doc ann
"Inputs:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> List TxInInfo -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. List TxInInfo -> Doc ann
pretty List TxInInfo
txInfoInputs
            , Doc ann
"Outputs:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> List TxOut -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. List TxOut -> Doc ann
pretty List TxOut
txInfoOutputs
            , Doc ann
"Fee:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> Value -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. Value -> Doc ann
pretty Value
txInfoFee
            , Doc ann
"Value minted:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> Value -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. Value -> Doc ann
pretty Value
txInfoMint
            , Doc ann
"DCerts:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> List DCert -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. List DCert -> Doc ann
pretty List DCert
txInfoDCert
            , Doc ann
"Wdrl:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> [(StakingCredential, Integer)] -> Doc ann
forall ann. [(StakingCredential, Integer)] -> Doc ann
forall a ann. Pretty a => a -> Doc ann
pretty [(StakingCredential, Integer)]
txInfoWdrl
            , Doc ann
"Valid range:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> POSIXTimeRange -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. POSIXTimeRange -> Doc ann
pretty POSIXTimeRange
txInfoValidRange
            , Doc ann
"Signatories:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> List PubKeyHash -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. List PubKeyHash -> Doc ann
pretty List PubKeyHash
txInfoSignatories
            , Doc ann
"Datums:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> [(DatumHash, Datum)] -> Doc ann
forall ann. [(DatumHash, Datum)] -> Doc ann
forall a ann. Pretty a => a -> Doc ann
pretty [(DatumHash, Datum)]
txInfoData
            ]

-- | The context that the currently-executing script can access.
data ScriptContext = ScriptContext
    { ScriptContext -> TxInfo
scriptContextTxInfo  :: TxInfo -- ^ information about the transaction the currently-executing script is included in
    , ScriptContext -> ScriptPurpose
scriptContextPurpose :: ScriptPurpose -- ^ the purpose of the currently-executing script
    }
    deriving stock ((forall x. ScriptContext -> Rep ScriptContext x)
-> (forall x. Rep ScriptContext x -> ScriptContext)
-> Generic ScriptContext
forall x. Rep ScriptContext x -> ScriptContext
forall x. ScriptContext -> Rep ScriptContext x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cfrom :: forall x. ScriptContext -> Rep ScriptContext x
from :: forall x. ScriptContext -> Rep ScriptContext x
$cto :: forall x. Rep ScriptContext x -> ScriptContext
to :: forall x. Rep ScriptContext x -> ScriptContext
Generic, ScriptContext -> ScriptContext -> Bool
(ScriptContext -> ScriptContext -> Bool)
-> (ScriptContext -> ScriptContext -> Bool) -> Eq ScriptContext
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: ScriptContext -> ScriptContext -> Bool
== :: ScriptContext -> ScriptContext -> Bool
$c/= :: ScriptContext -> ScriptContext -> Bool
/= :: ScriptContext -> ScriptContext -> Bool
Haskell.Eq, Int -> ScriptContext -> ShowS
[ScriptContext] -> ShowS
ScriptContext -> String
(Int -> ScriptContext -> ShowS)
-> (ScriptContext -> String)
-> ([ScriptContext] -> ShowS)
-> Show ScriptContext
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
$cshowsPrec :: Int -> ScriptContext -> ShowS
showsPrec :: Int -> ScriptContext -> ShowS
$cshow :: ScriptContext -> String
show :: ScriptContext -> String
$cshowList :: [ScriptContext] -> ShowS
showList :: [ScriptContext] -> ShowS
Haskell.Show)

makeLift ''ScriptContext
makeIsDataIndexed ''ScriptContext [('ScriptContext,0)]

instance Eq ScriptContext where
    {-# INLINABLE (==) #-}
    ScriptContext TxInfo
info ScriptPurpose
purpose == :: ScriptContext -> ScriptContext -> Bool
== ScriptContext TxInfo
info' ScriptPurpose
purpose' = TxInfo
info TxInfo -> TxInfo -> Bool
forall a. Eq a => a -> a -> Bool
== TxInfo
info' Bool -> Bool -> Bool
&& ScriptPurpose
purpose ScriptPurpose -> ScriptPurpose -> Bool
forall a. Eq a => a -> a -> Bool
== ScriptPurpose
purpose'

instance Pretty ScriptContext where
    pretty :: forall ann. ScriptContext -> Doc ann
pretty ScriptContext{TxInfo
scriptContextTxInfo :: ScriptContext -> TxInfo
scriptContextTxInfo :: TxInfo
scriptContextTxInfo, ScriptPurpose
scriptContextPurpose :: ScriptContext -> ScriptPurpose
scriptContextPurpose :: ScriptPurpose
scriptContextPurpose} =
        [Doc ann] -> Doc ann
forall ann. [Doc ann] -> Doc ann
vsep
            [ Doc ann
"Purpose:" Doc ann -> Doc ann -> Doc ann
forall ann. Doc ann -> Doc ann -> Doc ann
<+> ScriptPurpose -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. ScriptPurpose -> Doc ann
pretty ScriptPurpose
scriptContextPurpose
            , Int -> Doc ann -> Doc ann
forall ann. Int -> Doc ann -> Doc ann
nest Int
2 (Doc ann -> Doc ann) -> Doc ann -> Doc ann
forall a b. (a -> b) -> a -> b
$ [Doc ann] -> Doc ann
forall ann. [Doc ann] -> Doc ann
vsep [Doc ann
"TxInfo:", TxInfo -> Doc ann
forall a ann. Pretty a => a -> Doc ann
forall ann. TxInfo -> Doc ann
pretty TxInfo
scriptContextTxInfo]
            ]

-- | Find the input currently being validated.
findOwnInput :: ScriptContext -> Maybe TxInInfo
findOwnInput :: ScriptContext -> Maybe TxInInfo
findOwnInput ScriptContext{scriptContextTxInfo :: ScriptContext -> TxInfo
scriptContextTxInfo=TxInfo{List TxInInfo
txInfoInputs :: TxInfo -> List TxInInfo
txInfoInputs :: List TxInInfo
txInfoInputs}, scriptContextPurpose :: ScriptContext -> ScriptPurpose
scriptContextPurpose=Spending TxOutRef
txOutRef} =
    (TxInInfo -> Bool) -> List TxInInfo -> Maybe TxInInfo
forall a. UnsafeFromData a => (a -> Bool) -> List a -> Maybe a
Data.List.find (\TxInInfo{TxOutRef
txInInfoOutRef :: TxInInfo -> TxOutRef
txInInfoOutRef :: TxOutRef
txInInfoOutRef} -> TxOutRef
txInInfoOutRef TxOutRef -> TxOutRef -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef
txOutRef) List TxInInfo
txInfoInputs
findOwnInput ScriptContext
_ = Maybe TxInInfo
forall a. Maybe a
Nothing
{-# INLINABLE findOwnInput #-}

-- | Find the data corresponding to a data hash, if there is one
findDatum :: DatumHash -> TxInfo -> Maybe Datum
findDatum :: DatumHash -> TxInfo -> Maybe Datum
findDatum DatumHash
dsh TxInfo{[(DatumHash, Datum)]
txInfoData :: TxInfo -> [(DatumHash, Datum)]
txInfoData :: [(DatumHash, Datum)]
txInfoData} = (DatumHash, Datum) -> Datum
forall a b. (a, b) -> b
snd ((DatumHash, Datum) -> Datum)
-> Maybe (DatumHash, Datum) -> Maybe Datum
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ((DatumHash, Datum) -> Bool)
-> [(DatumHash, Datum)] -> Maybe (DatumHash, Datum)
forall a. (a -> Bool) -> [a] -> Maybe a
find (DatumHash, Datum) -> Bool
forall {b}. (DatumHash, b) -> Bool
f [(DatumHash, Datum)]
txInfoData
    where
        f :: (DatumHash, b) -> Bool
f (DatumHash
dsh', b
_) = DatumHash
dsh' DatumHash -> DatumHash -> Bool
forall a. Eq a => a -> a -> Bool
== DatumHash
dsh
{-# INLINABLE findDatum #-}

-- | Find the hash of a datum, if it is part of the pending transaction's
--   hashes
findDatumHash :: Datum -> TxInfo -> Maybe DatumHash
findDatumHash :: Datum -> TxInfo -> Maybe DatumHash
findDatumHash Datum
ds TxInfo{[(DatumHash, Datum)]
txInfoData :: TxInfo -> [(DatumHash, Datum)]
txInfoData :: [(DatumHash, Datum)]
txInfoData} = (DatumHash, Datum) -> DatumHash
forall a b. (a, b) -> a
fst ((DatumHash, Datum) -> DatumHash)
-> Maybe (DatumHash, Datum) -> Maybe DatumHash
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ((DatumHash, Datum) -> Bool)
-> [(DatumHash, Datum)] -> Maybe (DatumHash, Datum)
forall a. (a -> Bool) -> [a] -> Maybe a
find (DatumHash, Datum) -> Bool
forall {a}. (a, Datum) -> Bool
f [(DatumHash, Datum)]
txInfoData
    where
        f :: (a, Datum) -> Bool
f (a
_, Datum
ds') = Datum
ds' Datum -> Datum -> Bool
forall a. Eq a => a -> a -> Bool
== Datum
ds
{-# INLINABLE findDatumHash #-}

-- | Given a UTXO reference and a transaction (`TxInfo`), resolve it to one of the transaction's inputs (`TxInInfo`).
findTxInByTxOutRef :: TxOutRef -> TxInfo -> Maybe TxInInfo
findTxInByTxOutRef :: TxOutRef -> TxInfo -> Maybe TxInInfo
findTxInByTxOutRef TxOutRef
outRef TxInfo{List TxInInfo
txInfoInputs :: TxInfo -> List TxInInfo
txInfoInputs :: List TxInInfo
txInfoInputs} =
    (TxInInfo -> Bool) -> List TxInInfo -> Maybe TxInInfo
forall a. UnsafeFromData a => (a -> Bool) -> List a -> Maybe a
Data.List.find (\TxInInfo{TxOutRef
txInInfoOutRef :: TxInInfo -> TxOutRef
txInInfoOutRef :: TxOutRef
txInInfoOutRef} -> TxOutRef
txInInfoOutRef TxOutRef -> TxOutRef -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef
outRef) List TxInInfo
txInfoInputs
{-# INLINABLE findTxInByTxOutRef #-}

-- | Finds all the outputs that pay to the same script address that we are currently spending from, if any.
findContinuingOutputs :: ScriptContext -> List Integer
findContinuingOutputs :: ScriptContext -> List Integer
findContinuingOutputs ScriptContext
ctx | Just TxInInfo{txInInfoResolved :: TxInInfo -> TxOut
txInInfoResolved=TxOut{Address
txOutAddress :: Address
txOutAddress :: TxOut -> Address
txOutAddress}} <- ScriptContext -> Maybe TxInInfo
findOwnInput ScriptContext
ctx = (TxOut -> Bool) -> List TxOut -> List Integer
forall a. UnsafeFromData a => (a -> Bool) -> List a -> List Integer
Data.List.findIndices (Address -> TxOut -> Bool
f Address
txOutAddress) (TxInfo -> List TxOut
txInfoOutputs (TxInfo -> List TxOut) -> TxInfo -> List TxOut
forall a b. (a -> b) -> a -> b
$ ScriptContext -> TxInfo
scriptContextTxInfo ScriptContext
ctx)
    where
        f :: Address -> TxOut -> Bool
f Address
addr TxOut{txOutAddress :: TxOut -> Address
txOutAddress=Address
otherAddress} = Address
addr Address -> Address -> Bool
forall a. Eq a => a -> a -> Bool
== Address
otherAddress
findContinuingOutputs ScriptContext
_ = BuiltinString -> List Integer
forall a. BuiltinString -> a
traceError BuiltinString
"Le" -- "Can't find any continuing outputs"
{-# INLINABLE findContinuingOutputs #-}

-- | Get all the outputs that pay to the same script address we are currently spending from, if any.
getContinuingOutputs :: ScriptContext -> List TxOut
getContinuingOutputs :: ScriptContext -> List TxOut
getContinuingOutputs ScriptContext
ctx | Just TxInInfo{txInInfoResolved :: TxInInfo -> TxOut
txInInfoResolved=TxOut{Address
txOutAddress :: TxOut -> Address
txOutAddress :: Address
txOutAddress}} <- ScriptContext -> Maybe TxInInfo
findOwnInput ScriptContext
ctx = (TxOut -> Bool) -> List TxOut -> List TxOut
forall a.
(UnsafeFromData a, ToData a) =>
(a -> Bool) -> List a -> List a
Data.List.filter (Address -> TxOut -> Bool
f Address
txOutAddress) (TxInfo -> List TxOut
txInfoOutputs (TxInfo -> List TxOut) -> TxInfo -> List TxOut
forall a b. (a -> b) -> a -> b
$ ScriptContext -> TxInfo
scriptContextTxInfo ScriptContext
ctx)
    where
        f :: Address -> TxOut -> Bool
f Address
addr TxOut{txOutAddress :: TxOut -> Address
txOutAddress=Address
otherAddress} = Address
addr Address -> Address -> Bool
forall a. Eq a => a -> a -> Bool
== Address
otherAddress
getContinuingOutputs ScriptContext
_ = BuiltinString -> List TxOut
forall a. BuiltinString -> a
traceError BuiltinString
"Lf" -- "Can't get any continuing outputs"
{-# INLINABLE getContinuingOutputs #-}

{- Note [Hashes in validator scripts]

We need to deal with hashes of four different things in a validator script:

1. Transactions
2. Validator scripts
3. Data scripts
4. Redeemer scripts

The mockchain code in 'Ledger.Tx' only deals with the hashes of(1)
and (2), and uses the 'Ledger.Tx.TxId' and `Digest SHA256` types for
them.

In PLC validator scripts the situation is different: First, they need to work
with hashes of (1-4). Second, the `Digest SHA256` type is not available in PLC
- we have to represent all hashes as `ByteStrings`.

To ensure that we only compare hashes of the correct type inside a validator
script, we define a newtype for each of them, as well as functions for creating
them from the correct types in Haskell, and for comparing them (in
`Language.Plutus.Runtime.TH`).

-}

-- | Check if a transaction was signed by the given public key.
txSignedBy :: TxInfo -> PubKeyHash -> Bool
txSignedBy :: TxInfo -> PubKeyHash -> Bool
txSignedBy TxInfo{List PubKeyHash
txInfoSignatories :: TxInfo -> List PubKeyHash
txInfoSignatories :: List PubKeyHash
txInfoSignatories} PubKeyHash
k = case (PubKeyHash -> Bool) -> List PubKeyHash -> Maybe PubKeyHash
forall a. UnsafeFromData a => (a -> Bool) -> List a -> Maybe a
Data.List.find (PubKeyHash -> PubKeyHash -> Bool
forall a. Eq a => a -> a -> Bool
(==) PubKeyHash
k) List PubKeyHash
txInfoSignatories of
    Just PubKeyHash
_  -> Bool
True
    Maybe PubKeyHash
Nothing -> Bool
False
{-# INLINABLE txSignedBy #-}

-- | Get the values paid to a public key address by a pending transaction.
pubKeyOutputsAt :: PubKeyHash -> TxInfo -> List Value
pubKeyOutputsAt :: PubKeyHash -> TxInfo -> List Value
pubKeyOutputsAt PubKeyHash
pk TxInfo
p =
    let flt :: TxOut -> Maybe Value
flt TxOut{txOutAddress :: TxOut -> Address
txOutAddress = Address (PubKeyCredential PubKeyHash
pk') Maybe StakingCredential
_, Value
txOutValue :: Value
txOutValue :: TxOut -> Value
txOutValue} | PubKeyHash
pk PubKeyHash -> PubKeyHash -> Bool
forall a. Eq a => a -> a -> Bool
== PubKeyHash
pk' = Value -> Maybe Value
forall a. a -> Maybe a
Just Value
txOutValue
        flt TxOut
_                             = Maybe Value
forall a. Maybe a
Nothing
    in (TxOut -> Maybe Value) -> List TxOut -> List Value
forall a b.
(UnsafeFromData a, ToData b) =>
(a -> Maybe b) -> List a -> List b
Data.List.mapMaybe TxOut -> Maybe Value
flt (TxInfo -> List TxOut
txInfoOutputs TxInfo
p)
{-# INLINABLE pubKeyOutputsAt #-}

-- | Get the total value paid to a public key address by a pending transaction.
valuePaidTo :: TxInfo -> PubKeyHash -> Value
valuePaidTo :: TxInfo -> PubKeyHash -> Value
valuePaidTo TxInfo
ptx PubKeyHash
pkh = List Value -> Value
forall a. (Monoid a, UnsafeFromData a) => List a -> a
Data.List.mconcat (PubKeyHash -> TxInfo -> List Value
pubKeyOutputsAt PubKeyHash
pkh TxInfo
ptx)
{-# INLINABLE valuePaidTo #-}

-- | Get the total value of inputs spent by this transaction.
valueSpent :: TxInfo -> Value
valueSpent :: TxInfo -> Value
valueSpent = (TxInInfo -> Value) -> List TxInInfo -> Value
forall a m. (UnsafeFromData a, Monoid m) => (a -> m) -> List a -> m
Data.List.foldMap (TxOut -> Value
txOutValue (TxOut -> Value) -> (TxInInfo -> TxOut) -> TxInInfo -> Value
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TxInInfo -> TxOut
txInInfoResolved) (List TxInInfo -> Value)
-> (TxInfo -> List TxInInfo) -> TxInfo -> Value
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TxInfo -> List TxInInfo
txInfoInputs
{-# INLINABLE valueSpent #-}

-- | Get the total value of outputs produced by this transaction.
valueProduced :: TxInfo -> Value
valueProduced :: TxInfo -> Value
valueProduced = (TxOut -> Value) -> List TxOut -> Value
forall a m. (UnsafeFromData a, Monoid m) => (a -> m) -> List a -> m
Data.List.foldMap TxOut -> Value
txOutValue (List TxOut -> Value) -> (TxInfo -> List TxOut) -> TxInfo -> Value
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TxInfo -> List TxOut
txInfoOutputs
{-# INLINABLE valueProduced #-}

-- | The 'CurrencySymbol' of the current validator script.
ownCurrencySymbol :: ScriptContext -> CurrencySymbol
ownCurrencySymbol :: ScriptContext -> CurrencySymbol
ownCurrencySymbol ScriptContext{scriptContextPurpose :: ScriptContext -> ScriptPurpose
scriptContextPurpose=Minting CurrencySymbol
cs} = CurrencySymbol
cs
ownCurrencySymbol ScriptContext
_                                              = BuiltinString -> CurrencySymbol
forall a. BuiltinString -> a
traceError BuiltinString
"Lh" -- "Can't get currency symbol of the current validator script"
{-# INLINABLE ownCurrencySymbol #-}

{- | Check if the pending transaction spends a specific transaction output
(identified by the hash of a transaction and an index into that
transactions' outputs)
-}
spendsOutput :: TxInfo -> TxId -> Integer -> Bool
spendsOutput :: TxInfo -> TxId -> Integer -> Bool
spendsOutput TxInfo
p TxId
h Integer
i =
    let spendsOutRef :: TxInInfo -> Bool
spendsOutRef TxInInfo
inp =
            let outRef :: TxOutRef
outRef = TxInInfo -> TxOutRef
txInInfoOutRef TxInInfo
inp
            in TxId
h TxId -> TxId -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef -> TxId
txOutRefId TxOutRef
outRef
                Bool -> Bool -> Bool
&& Integer
i Integer -> Integer -> Bool
forall a. Eq a => a -> a -> Bool
== TxOutRef -> Integer
txOutRefIdx TxOutRef
outRef
    in (TxInInfo -> Bool) -> List TxInInfo -> Bool
forall a. UnsafeFromData a => (a -> Bool) -> List a -> Bool
Data.List.any TxInInfo -> Bool
spendsOutRef (TxInfo -> List TxInInfo
txInfoInputs TxInfo
p)
{-# INLINABLE spendsOutput #-}