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ContractTestUtils.purs
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ContractTestUtils.purs
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-- | This module demonstrates how various assertions from `Contract.Test.Utils`
-- | can be used to test `Contract`s. It creates a transaction with metadata
-- | that performs three actions: (1) sends some amount of Ada to the receiver's
-- | address, (2) mints the specified non-Ada value (3) then sends it to the
-- | owner's address with a datum attached.
module Ctl.Examples.ContractTestUtils
( ContractParams
, mkContract
, mkChecks
) where
import Contract.Prelude
import Contract.Address
( Address
, PaymentPubKeyHash
, StakePubKeyHash
, getNetworkId
, payPubKeyHashBaseAddress
, payPubKeyHashEnterpriseAddress
)
import Contract.AuxiliaryData (setTxMetadata)
import Contract.Hashing (datumHash)
import Contract.Log (logInfo')
import Contract.Metadata (Cip25Metadata)
import Contract.Monad (Contract, liftContractM, liftedE, liftedM)
import Contract.PlutusData (Datum, OutputDatum(OutputDatumHash))
import Contract.ScriptLookups as Lookups
import Contract.Scripts (MintingPolicy)
import Contract.Test.Assert
( ContractCheck
, assertOutputHasDatum
, assertOutputHasRefScript
, assertTxHasMetadata
, assertionToCheck
, checkExUnitsNotExceed
, checkGainAtAddress'
, checkLossAtAddress
, checkTokenGainAtAddress'
, label
)
import Contract.Transaction
( TransactionHash
, TransactionOutputWithRefScript
, TransactionUnspentOutput
, _output
, awaitTxConfirmed
, balanceTx
, getTxFinalFee
, lookupTxHash
, scriptRefFromMintingPolicy
, signTransaction
, submit
)
import Contract.TxConstraints (DatumPresence(DatumWitness))
import Contract.TxConstraints as Constraints
import Contract.Utxos (utxosAt)
import Contract.Value (CurrencySymbol, TokenName, Value)
import Contract.Value (lovelaceValueOf, singleton) as Value
import Contract.Wallet
( getWalletAddresses
, ownPaymentPubKeyHashes
, ownStakePubKeyHashes
)
import Ctl.Examples.Helpers (mustPayToPubKeyStakeAddress) as Helpers
import Data.Array (head)
import Data.BigInt (BigInt)
import Data.BigInt as BigInt
import Data.Lens (view)
import Effect.Exception (throw)
type ContractParams =
{ receiverPkh :: PaymentPubKeyHash
, receiverSkh :: Maybe StakePubKeyHash
, adaToSend :: BigInt
, mintingPolicy :: MintingPolicy
, tokensToMint :: Tuple3 CurrencySymbol TokenName BigInt
, datumToAttach :: Datum
, txMetadata :: Cip25Metadata
}
type ContractResult =
{ txHash :: TransactionHash
, txFinalFee :: BigInt
, txOutputUnderTest :: TransactionOutputWithRefScript
}
mkChecks
:: ContractParams
-> Contract (Array (ContractCheck ContractResult))
mkChecks p = do
senderAddress <-
liftedM "Failed to get sender address" $ head <$> getWalletAddresses
receiverAddress <-
liftedM "Failed to get receiver address" (getReceiverAddress p)
let dhash = datumHash p.datumToAttach
pure
[ checkGainAtAddress' (label receiverAddress "Receiver")
p.adaToSend
, checkLossAtAddress (label senderAddress "Sender")
case _ of
Just { txFinalFee } -> pure (p.adaToSend + txFinalFee)
Nothing -> liftEffect $
throw "Unable to estimate expected loss in wallet"
, checkTokenGainAtAddress' (label senderAddress "Sender")
( uncurry3 (\cs tn amount -> cs /\ tn /\ amount)
p.tokensToMint
)
, checkExUnitsNotExceed
{ mem: BigInt.fromInt 800, steps: BigInt.fromInt 161100 }
, assertionToCheck "Sender's output has a datum"
\{ txOutputUnderTest } ->
assertOutputHasDatum (OutputDatumHash dhash)
(label txOutputUnderTest "Sender's output with datum hash")
, assertionToCheck "Output has a reference script"
\{ txOutputUnderTest } ->
assertOutputHasRefScript
(scriptRefFromMintingPolicy p.mintingPolicy)
(label txOutputUnderTest "Sender's output with reference script")
, assertionToCheck "Contains CIP-25 metadata" \{ txHash } ->
assertTxHasMetadata "CIP25 Metadata" txHash p.txMetadata
]
mkContract :: ContractParams -> Contract ContractResult
mkContract p = do
logInfo' "Running Examples.ContractTestUtils"
ownPkh <- liftedM "Failed to get own PKH" $ head <$> ownPaymentPubKeyHashes
ownSkh <- join <<< head <$> ownStakePubKeyHashes
let
mustPayToPubKeyStakeAddressWithDatumAndScriptRef =
ownSkh # maybe Constraints.mustPayToPubKeyWithDatumAndScriptRef
\skh pkh ->
Constraints.mustPayToPubKeyAddressWithDatumAndScriptRef pkh skh
adaValue :: Value
adaValue = Value.lovelaceValueOf p.adaToSend
nonAdaValue :: Value
nonAdaValue = uncurry3 Value.singleton p.tokensToMint
constraints :: Constraints.TxConstraints Void Void
constraints = mconcat
[ Helpers.mustPayToPubKeyStakeAddress p.receiverPkh p.receiverSkh adaValue
, Constraints.mustMintValue nonAdaValue
, mustPayToPubKeyStakeAddressWithDatumAndScriptRef ownPkh p.datumToAttach
DatumWitness
(scriptRefFromMintingPolicy p.mintingPolicy)
nonAdaValue
]
lookups :: Lookups.ScriptLookups Void
lookups = Lookups.mintingPolicy p.mintingPolicy
unbalancedTx <- liftedE $ Lookups.mkUnbalancedTx lookups constraints
unbalancedTxWithMetadata <- setTxMetadata unbalancedTx p.txMetadata
balancedTx <- liftedE $ balanceTx unbalancedTxWithMetadata
balancedSignedTx <- signTransaction balancedTx
txId <- submit balancedSignedTx
logInfo' $ "Tx ID: " <> show txId
awaitTxConfirmed txId
logInfo' "Tx submitted successfully!"
senderAddress <- liftedM "Failed to get sender address" $ head <$>
getWalletAddresses
utxos <- utxosAt senderAddress
txOutputUnderTest <-
view _output <$>
liftContractM "Could not find required unspent output with datum hash"
(find hasDatumHash $ lookupTxHash txId utxos)
pure
{ txHash: txId
, txFinalFee: getTxFinalFee balancedSignedTx
, txOutputUnderTest
}
where
hasDatumHash :: TransactionUnspentOutput -> Boolean
hasDatumHash = view _output >>> unwrap >>> _.output >>> unwrap >>> _.datum >>>
case _ of
OutputDatumHash _ -> true
_ -> false
getReceiverAddress :: ContractParams -> Contract (Maybe Address)
getReceiverAddress { receiverPkh, receiverSkh } =
getNetworkId <#> \networkId ->
case receiverSkh of
Just skh ->
payPubKeyHashBaseAddress networkId receiverPkh skh
Nothing ->
payPubKeyHashEnterpriseAddress networkId receiverPkh