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OnChain.hs
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OnChain.hs
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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# options_ghc -fno-strictness #-}
{-# options_ghc -fno-specialise #-}
module Contracts.NFT.OnChain
(marketInstance)
where
import Contracts.NFT.Types
import Contracts.NFT.NFTCurrency (nftCurrencySymbol)
import Control.Monad hiding (fmap)
import qualified Data.Map as Map
import qualified Data.ByteString.Char8 as B
import qualified Data.ByteString.Base64 as B64
import qualified Data.Text as T
import Data.Monoid (Last (..))
import Data.Proxy (Proxy (..))
import Data.Text (Text, pack)
import Data.Void (Void)
import Ledger hiding (singleton)
import qualified Ledger.Ada as Ada
import Ledger.Constraints as Constraints
import Ledger.Constraints.OnChain as Constraints
import Ledger.Constraints.TxConstraints as Constraints
import qualified Ledger.Typed.Scripts as Scripts
import Ledger.Value (AssetClass (..), assetClass, assetClassValue, assetClassValueOf, valueOf,
symbols, unCurrencySymbol, unTokenName, CurrencySymbol(..), flattenValue)
import qualified Ledger.Value as Value
import qualified Ledger.Contexts as Validation
import Playground.Contract
import Plutus.Contract hiding (when)
import qualified Plutus.Contracts.Currency as Currency
import qualified PlutusTx
import PlutusTx.Prelude hiding (Semigroup (..), unless)
import Prelude (Semigroup (..))
import qualified Prelude
import Text.Printf (printf)
import Wallet.Emulator (walletPubKey)
{-# INLINABLE findOwnInput' #-}
findOwnInput' :: ScriptContext -> TxInInfo
findOwnInput' ctx = fromMaybe (error ()) (findOwnInput ctx)
{-# INLINABLE findMarketDatum #-}
findMarketDatum :: TxInfo -> DatumHash -> NFTMetadata
findMarketDatum info h = case findDatum h info of
Just (Datum d) -> case PlutusTx.unsafeFromBuiltinData d of
(NFTMeta nft) -> nft
_ -> traceError "error decoding data"
_ -> traceError "market input datum not found"
{-# INLINABLE validateCreate #-}
validateCreate ::
NFTMarket
-> [NFTMetadata]
-> NFTMetadata
-> ScriptContext
-> Bool
validateCreate NFTMarket{..} nftMetas nftMeta@NFTMetadata{..} ctx =
traceIfFalse "market token symbol should be token symbol" (marketTokenSymbol == nftTokenSymbol) &&
traceIfFalse "market meta token symbol should be meta token symbol" (marketTokenMetaSymbol == nftMetaTokenSymbol) &&
traceIfFalse "meta token name should be 'tokenName' + Metadata"
(unTokenName nftMetaTokenName == PlutusTx.Prelude.appendByteString (unTokenName nftTokenName) marketTokenMetaNameSuffix) &&
traceIfFalse "marketplace not present" (isMarketToken (valueWithin $ findOwnInput' ctx) marketId) &&
traceIfFalse "nft token is arleady exists" (all (/= nftMeta) nftMetas) &&
traceIfFalse "should forge NFT token" (isNftToken forged nftTokenSymbol nftTokenName) &&
traceIfFalse "should forge NFT metadata token" (isNftToken forged nftMetaTokenSymbol nftMetaTokenName) &&
traceIfFalse "should only nft and metadata token" (forgedTokensCount == 2) &&
Constraints.checkOwnOutputConstraint ctx (OutputConstraint (Factory $ nftMeta : nftMetas) $ assetClassValue marketId 1) &&
Constraints.checkOwnOutputConstraint ctx (OutputConstraint (NFTMeta nftMeta) $ getNftValue nftMetaTokenSymbol nftMetaTokenName)
where
forged :: Value
forged = txInfoMint $ scriptContextTxInfo ctx
forgedTokensCount :: Integer
forgedTokensCount = length $ flattenValue forged
{-# INLINABLE validateSell #-}
validateSell ::
NFTMarket
-> NFTMetadata
-> ScriptContext
-> Bool
validateSell NFTMarket{..} nftMeta@NFTMetadata{nftMetaTokenSymbol, nftMetaTokenName, nftTokenSymbol, nftTokenName} ctx =
traceIfFalse "owner should sign" ownerSigned &&
traceIfFalse "nft metadata token missing from input" (isNftToken inVal nftMetaTokenSymbol nftMetaTokenName) &&
traceIfFalse "ouptut nftMetadata should be same" (nftMeta == outDatum) &&
traceIfFalse "price should be greater than 0" (nftSellPrice outDatum > 0)
where
info :: TxInfo
info = scriptContextTxInfo ctx
ownInput :: TxInInfo
ownInput = findOwnInput' ctx
ownOutput :: TxOut
ownOutput = case [ o
| o <- getContinuingOutputs ctx
, isNftToken (txOutValue o) nftMetaTokenSymbol nftMetaTokenName &&
isNftToken (txOutValue o) nftTokenSymbol nftTokenName
] of
[o] -> o
_ -> traceError "expected exactly one nft metadata output and one nft token output"
outDatum :: NFTMetadata
outDatum = case txOutDatum ownOutput of
Nothing -> traceError "nft metadata not found"
Just h -> findMarketDatum info h
inVal, outVal :: Value
inVal = valueWithin ownInput
outVal = txOutValue ownOutput
ownerSigned :: Bool
ownerSigned = case nftSeller outDatum of
Nothing -> False
Just pkh -> txSignedBy info pkh
{-# INLINABLE validateCancelSell #-}
validateCancelSell ::
NFTMarket
-> NFTMetadata
-> ScriptContext
-> Bool
validateCancelSell NFTMarket{..} nftMeta@NFTMetadata{nftMetaTokenSymbol, nftMetaTokenName, nftTokenSymbol, nftTokenName} ctx =
traceIfFalse "owner should sign" ownerSigned &&
traceIfFalse "nft metadata token missing from input" (isNftToken inVal nftMetaTokenSymbol nftMetaTokenName) &&
traceIfFalse "nft token missing from input" (isNftToken inVal nftTokenSymbol nftTokenName) &&
traceIfFalse "ouptut nftMetadata should be same" (nftMeta == outDatum) &&
traceIfFalse "price should be emptied" (nftSellPrice outDatum == 0) &&
traceIfFalse "seller should be emptied" (PlutusTx.Prelude.isNothing $ nftSeller outDatum)
where
info :: TxInfo
info = scriptContextTxInfo ctx
ownInput :: TxInInfo
ownInput = findOwnInput' ctx
ownOutput :: TxOut
ownOutput = case [ o
| o <- getContinuingOutputs ctx
, isNftToken (txOutValue o) nftMetaTokenSymbol nftMetaTokenName
] of
[o] -> o
_ -> traceError "expected exactly one nft metadata output"
outDatum :: NFTMetadata
outDatum = case txOutDatum ownOutput of
Nothing -> traceError "nft metadata not found"
Just h -> findMarketDatum info h
inVal, outVal :: Value
inVal = valueWithin ownInput
outVal = txOutValue ownOutput
ownerSigned :: Bool
ownerSigned = case nftSeller nftMeta of
Nothing -> False
Just pkh -> txSignedBy info pkh
{-# INLINABLE validateBuy #-}
validateBuy ::
NFTMarket
-> NFTMetadata
-> PubKeyHash
-> ScriptContext
-> Bool
validateBuy NFTMarket{..} nftMeta@NFTMetadata{nftMetaTokenSymbol, nftMetaTokenName, nftTokenSymbol, nftTokenName} buyer ctx =
traceIfFalse "nft metadata token missing from input" $ isNftToken inVal nftMetaTokenSymbol nftMetaTokenName &&
traceIfFalse "ouptut nftMetadata should be same" (nftMeta == outDatum) &&
traceIfFalse "expected seller to get money" (addressGetValue (nftSeller nftMeta) $ Ada.lovelaceValueOf (nftSellPrice nftMeta - marketFee)) &&
traceIfFalse "expected buyer to get NFT token" (addressGetValue (Just buyer) $ getNftValue nftTokenSymbol nftTokenName) &&
traceIfFalse "expected market owner to get fee" (addressGetValue (Just marketOwner) $ Ada.lovelaceValueOf marketFee) &&
traceIfFalse "price should be grater 0" (nftSellPrice outDatum == 0) &&
traceIfFalse "fee should be grater 0" (marketFee > 0) &&
traceIfFalse "seller should be emptied" (PlutusTx.Prelude.isNothing $ nftSeller outDatum)
where
info :: TxInfo
info = scriptContextTxInfo ctx
ownInput :: TxInInfo
ownInput = findOwnInput' ctx
ownOutput :: TxOut
ownOutput = case [ o
| o <- getContinuingOutputs ctx
, isNftToken (txOutValue o) nftMetaTokenSymbol nftMetaTokenName
] of
[o] -> o
_ -> traceError "expected exactly one nft metadata output"
outDatum :: NFTMetadata
outDatum = case txOutDatum ownOutput of
Nothing -> traceError "nft metadata not found"
Just h -> findMarketDatum info h
inVal, outVal :: Value
inVal = valueWithin ownInput
outVal = txOutValue ownOutput
addressGetValue :: Maybe PubKeyHash -> Value -> Bool
addressGetValue h v =
let
[o] = [ o'
| o' <- txInfoOutputs info
, txOutValue o' == v
]
in
fromMaybe False ((==) <$> Validation.pubKeyOutput o <*> h )
{-# INLINABLE mkNFTMarketValidator #-}
mkNFTMarketValidator ::
NFTMarket
-> NFTMarketDatum
-> NFTMarketAction
-> ScriptContext
-> Bool
mkNFTMarketValidator market (Factory nftMetas) (Create nftMeta) ctx = validateCreate market nftMetas nftMeta ctx
mkNFTMarketValidator market (NFTMeta nftMeta) Sell ctx = validateSell market nftMeta ctx
mkNFTMarketValidator market (NFTMeta nftMeta) CancelSell ctx = validateCancelSell market nftMeta ctx
mkNFTMarketValidator market (NFTMeta nftMeta) (Buy buyer) ctx = validateBuy market nftMeta buyer ctx
mkNFTMarketValidator _ _ _ _ = False
data Market
instance Scripts.ValidatorTypes Market where
type instance RedeemerType Market = NFTMarketAction
type instance DatumType Market = NFTMarketDatum
marketInstance :: NFTMarket -> Scripts.TypedValidator Market
marketInstance market = Scripts.mkTypedValidator @Market
($$(PlutusTx.compile [|| mkNFTMarketValidator ||])
`PlutusTx.applyCode` PlutusTx.liftCode market)
$$(PlutusTx.compile [|| wrap ||])
where
wrap = Scripts.wrapValidator @NFTMarketDatum @NFTMarketAction