diff --git a/code/week02/.devcontainer/devcontainer.json b/code/week02/.devcontainer/devcontainer.json new file mode 100644 index 0000000..68c9010 --- /dev/null +++ b/code/week02/.devcontainer/devcontainer.json @@ -0,0 +1,21 @@ +{ + "name": "Plutus Starter Project", + "image": "plutus-devcontainer:latest", + + "mounts": [ + // This shares cabal's remote repository state with the host. We don't mount the whole of '.cabal', because + // 1. '.cabal/config' contains absolute paths that will only make sense on the host, and + // 2. '.cabal/store' is not necessarily portable to different version of cabal etc. + "source=${localEnv:HOME}/.cabal/packages,target=/root/.cabal/packages,type=bind,consistency=cached", + ], + + "settings": { + // Note: don't change from bash so it runs .bashrc + "terminal.integrated.shell.linux": "/bin/bash" + }, + + // IDs of extensions inside container + "extensions": [ + "haskell.haskell" + ], +} diff --git a/code/week02/.gitignore b/code/week02/.gitignore new file mode 100644 index 0000000..c33954f --- /dev/null +++ b/code/week02/.gitignore @@ -0,0 +1 @@ +dist-newstyle/ diff --git a/code/week02/LICENSE b/code/week02/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/code/week02/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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Make sure to +-- re-update this section from the template when you do an upgrade. + +package eventful-sql-common + ghc-options: -XDerivingStrategies -XStandaloneDeriving -XUndecidableInstances -XDataKinds -XFlexibleInstances + +allow-newer: + -- Has a commit to allow newer aeson, not on Hackage yet + monoidal-containers:aeson + -- Pins to an old version of Template Haskell, unclear if/when it will be updated + , size-based:template-haskell + + -- The following two dependencies are needed by plutus. + , eventful-sql-common:persistent + , eventful-sql-common:persistent-template + +constraints: + -- aws-lambda-haskell-runtime-wai doesn't compile with newer versions + aws-lambda-haskell-runtime <= 3.0.3 + +-- Needs some patches, but upstream seems to be fairly dead (no activity in > 1 year) +source-repository-package + type: git + location: https://github.com/shmish111/purescript-bridge.git + tag: 6a92d7853ea514be8b70bab5e72077bf5a510596 + +source-repository-package + type: git + location: https://github.com/shmish111/servant-purescript.git + tag: a76104490499aa72d40c2790d10e9383e0dbde63 + +source-repository-package + type: git + location: https://github.com/input-output-hk/cardano-crypto.git + tag: f73079303f663e028288f9f4a9e08bcca39a923e + +-- Needs a fix (https://github.com/wenkokke/unlit/pull/11) and a Hackage release +source-repository-package + type: git + location: https://github.com/michaelpj/unlit.git + tag: 9ca1112093c5ffd356fc99c7dafa080e686dd748 + +source-repository-package + type: git + location: https://github.com/input-output-hk/cardano-base + tag: 4251c0bb6e4f443f00231d28f5f70d42876da055 + subdir: + binary + binary/test + slotting + cardano-crypto-class + cardano-crypto-praos + +source-repository-package + type: git + location: https://github.com/input-output-hk/cardano-prelude + tag: ee4e7b547a991876e6b05ba542f4e62909f4a571 + subdir: + cardano-prelude + cardano-prelude-test + +source-repository-package + type: git + location: https://github.com/input-output-hk/ouroboros-network + tag: 6cb9052bde39472a0555d19ade8a42da63d3e904 + subdir: + typed-protocols + typed-protocols-examples + ouroboros-network + ouroboros-network-testing + ouroboros-network-framework + io-sim + io-sim-classes + network-mux + Win32-network + +source-repository-package + type: git + location: https://github.com/input-output-hk/iohk-monitoring-framework + tag: a89c38ed5825ba17ca79fddb85651007753d699d + subdir: + iohk-monitoring + tracer-transformers + contra-tracer + plugins/backend-ekg + +source-repository-package + type: git + location: https://github.com/input-output-hk/cardano-ledger-specs + tag: 097890495cbb0e8b62106bcd090a5721c3f4b36f + subdir: + byron/chain/executable-spec + byron/crypto + byron/crypto/test + byron/ledger/executable-spec + byron/ledger/impl + byron/ledger/impl/test + semantics/executable-spec + semantics/small-steps-test + shelley/chain-and-ledger/dependencies/non-integer + shelley/chain-and-ledger/executable-spec + shelley-ma/impl + +source-repository-package + type: git + location: https://github.com/input-output-hk/goblins + tag: cde90a2b27f79187ca8310b6549331e59595e7ba diff --git a/code/week02/hie.yaml b/code/week02/hie.yaml new file mode 100644 index 0000000..0576dcf --- /dev/null +++ b/code/week02/hie.yaml @@ -0,0 +1,4 @@ +cradle: + cabal: + - path: "./src" + component: "lib:plutus-pioneer-program-week02" diff --git a/code/week02/plutus-pioneer-program-week02.cabal b/code/week02/plutus-pioneer-program-week02.cabal new file mode 100644 index 0000000..762e041 --- /dev/null +++ b/code/week02/plutus-pioneer-program-week02.cabal @@ -0,0 +1,24 @@ +Cabal-Version: 2.4 +Name: plutus-pioneer-program-week02 +Version: 0.1.0.0 +Author: Lars Bruenjes +Maintainer: brunjlar@gmail.com +Build-Type: Simple +Copyright: © 2021 Lars Bruenjes +License: Apache-2.0 +License-files: LICENSE + +library + hs-source-dirs: src + exposed-modules: Week02.Validators + build-depends: aeson + , base ^>=4.14.1.0 + , containers + , playground-common + , plutus-contract + , plutus-ledger + , plutus-tx-plugin + , plutus-tx + , text + default-language: Haskell2010 + ghc-options: -Wall -fobject-code -fno-ignore-interface-pragmas -fno-omit-interface-pragmas -fno-strictness -fno-spec-constr -fno-specialise diff --git a/code/week02/src/Week02/Validators.hs b/code/week02/src/Week02/Validators.hs new file mode 100644 index 0000000..36e2297 --- /dev/null +++ b/code/week02/src/Week02/Validators.hs @@ -0,0 +1,368 @@ +{-# 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 #-} + +module Week02.Validators + ( Auction (..) + , StartParams (..), BidParams (..), CloseParams (..) + , AuctionSchema + , start, bid, close + , endpoints + , schemas + , ensureKnownCurrencies + , printJson + , printSchemas + , registeredKnownCurrencies + , stage + ) where + +import Control.Monad hiding (fmap) +import Data.Aeson (ToJSON, FromJSON) +import Data.List.NonEmpty (NonEmpty (..)) +import Data.Map as Map +import Data.Text (pack, Text) +import GHC.Generics (Generic) +import Plutus.Contract hiding (when) +import qualified PlutusTx as PlutusTx +import PlutusTx.Prelude hiding (Semigroup(..), unless) +import qualified PlutusTx.Prelude as Plutus +import Ledger hiding (singleton) +import Ledger.Constraints as Constraints +import qualified Ledger.Scripts as Scripts +import qualified Ledger.Typed.Scripts as Scripts +import Ledger.Value as Value +import Ledger.Ada as Ada +import Playground.Contract (ensureKnownCurrencies, printSchemas, stage, printJson) +import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions) +import Playground.Types (KnownCurrency (..)) +import Prelude (Semigroup (..)) +import Schema (ToSchema) +import Text.Printf (printf) + +data Auction = Auction + { aSeller :: !PubKeyHash + , aDeadline :: !Slot + , aMinBid :: !Integer + , aCurrency :: !CurrencySymbol + , aToken :: !TokenName + } deriving (Show, Generic, ToJSON, FromJSON, ToSchema) + +instance Eq Auction where + {-# INLINABLE (==) #-} + a == b = (aSeller a == aSeller b) && + (aDeadline a == aDeadline b) && + (aMinBid a == aMinBid b) && + (aCurrency a == aCurrency b) && + (aToken a == aToken b) + +PlutusTx.unstableMakeIsData ''Auction +PlutusTx.makeLift ''Auction + +data Bid = Bid + { bBidder :: !PubKeyHash + , bBid :: !Integer + } deriving Show + +instance Eq Bid where + {-# INLINABLE (==) #-} + b == c = (bBidder b == bBidder c) && + (bBid b == bBid c) + +PlutusTx.unstableMakeIsData ''Bid +PlutusTx.makeLift ''Bid + +data AuctionAction = MkBid Bid | Close + deriving Show + +PlutusTx.unstableMakeIsData ''AuctionAction +PlutusTx.makeLift ''AuctionAction + +data AuctionDatum = AuctionDatum + { adAuction :: !Auction + , adHighestBid :: !(Maybe Bid) + } deriving Show + +PlutusTx.unstableMakeIsData ''AuctionDatum +PlutusTx.makeLift ''AuctionDatum + +data Auctioning +instance Scripts.ScriptType Auctioning where + type instance RedeemerType Auctioning = AuctionAction + type instance DatumType Auctioning = AuctionDatum + +{-# INLINABLE minBid #-} +minBid :: AuctionDatum -> Integer +minBid AuctionDatum{..} = case adHighestBid of + Nothing -> aMinBid adAuction + Just Bid{..} -> bBid + 1 + +{-# INLINABLE mkAuctionValidator #-} +mkAuctionValidator :: AuctionDatum -> AuctionAction -> ValidatorCtx -> Bool +mkAuctionValidator ad redeemer ctx = + traceIfFalse "wrong input value" correctInputValue && + case redeemer of + MkBid b@Bid{..} -> + traceIfFalse "bid too low" (sufficientBid bBid) && + traceIfFalse "wrong output datum" (correctBidOutputDatum b) && + traceIfFalse "wrong output value" (correctBidOutputValue bBid) && + traceIfFalse "wrong refund" correctBidRefund && + traceIfFalse "too late" correctBidSlotRange + Close -> + traceIfFalse "too early" correctCloseSlotRange && + case adHighestBid ad of + Nothing -> + traceIfFalse "expected seller to get token" (getsValue (aSeller auction) tokenValue) + Just Bid{..} -> + traceIfFalse "expected highest bidder to get token" (getsValue bBidder tokenValue) && + traceIfFalse "expected seller to get highest bid" (getsValue (aSeller auction) $ Ada.lovelaceValueOf bBid) + + where + info :: TxInfo + info = valCtxTxInfo ctx + + input :: TxInInfo + input = + let + isScriptInput i = case txInInfoWitness i of + Nothing -> False + Just _ -> True + xs = [i | i <- txInfoInputs info, isScriptInput i] + in + case xs of + [i] -> i + _ -> traceError "expected exactly one script input" + + inVal :: Value + inVal = txInInfoValue input + + auction :: Auction + auction = adAuction ad + + tokenValue :: Value + tokenValue = Value.singleton (aCurrency auction) (aToken auction) 1 + + correctInputValue :: Bool + correctInputValue = inVal == case adHighestBid ad of + Nothing -> tokenValue + Just Bid{..} -> tokenValue Plutus.<> Ada.lovelaceValueOf bBid + + sufficientBid :: Integer -> Bool + sufficientBid amount = amount >= minBid ad + + ownOutput :: TxOutInfo + outputDatum :: AuctionDatum + (ownOutput, outputDatum) = case getContinuingOutputs ctx of + [o] -> case txOutType o of + PayToPubKey -> traceError "wrong output type" + PayToScript h -> case findDatum h info of + Nothing -> traceError "datum not found" + Just (Datum d) -> case PlutusTx.fromData d of + Just ad' -> (o, ad') + Nothing -> traceError "error decoding data" + _ -> traceError "expected exactly one continuing output" + + correctBidOutputDatum :: Bid -> Bool + correctBidOutputDatum b = (adAuction outputDatum == auction) && + (adHighestBid outputDatum == Just b) + + correctBidOutputValue :: Integer -> Bool + correctBidOutputValue amount = + txOutValue ownOutput == tokenValue Plutus.<> Ada.lovelaceValueOf amount + + correctBidRefund :: Bool + correctBidRefund = case adHighestBid ad of + Nothing -> True + Just Bid{..} -> + let + os = [ o + | o <- txInfoOutputs info + , txOutAddress o == PubKeyAddress bBidder + ] + in + case os of + [o] -> txOutValue o == Ada.lovelaceValueOf bBid + _ -> traceError "expected exactly one refund output" + + correctBidSlotRange :: Bool + correctBidSlotRange = to (aDeadline auction) `contains` txInfoValidRange info + + correctCloseSlotRange :: Bool + correctCloseSlotRange = from (aDeadline auction) `contains` txInfoValidRange info + + getsValue :: PubKeyHash -> Value -> Bool + getsValue h v = + let + [o] = [ o' + | o' <- txInfoOutputs info + , txOutValue o' == v + ] + in + txOutAddress o == PubKeyAddress h + +auctionInstance :: Scripts.ScriptInstance Auctioning +auctionInstance = Scripts.validator @Auctioning + $$(PlutusTx.compile [|| mkAuctionValidator ||]) + $$(PlutusTx.compile [|| wrap ||]) + where + wrap = Scripts.wrapValidator @AuctionDatum @AuctionAction + +auctionValidator :: Validator +auctionValidator = Scripts.validatorScript auctionInstance + +auctionHash :: Ledger.ValidatorHash +auctionHash = Scripts.validatorHash auctionValidator + +auctionAddress :: Ledger.Address +auctionAddress = ScriptAddress auctionHash + +data StartParams = StartParams + { spDeadline :: !Slot + , spMinBid :: !Integer + , spCurrency :: !CurrencySymbol + , spToken :: !TokenName + } deriving (Generic, ToJSON, FromJSON, ToSchema) + +data BidParams = BidParams + { bpCurrency :: !CurrencySymbol + , bpToken :: !TokenName + , bpBid :: !Integer + } deriving (Generic, ToJSON, FromJSON, ToSchema) + +data CloseParams = CloseParams + { cpCurrency :: !CurrencySymbol + , cpToken :: !TokenName + } deriving (Generic, ToJSON, FromJSON, ToSchema) + +type AuctionSchema = + BlockchainActions + .\/ Endpoint "start" StartParams + .\/ Endpoint "bid" BidParams + .\/ Endpoint "close" CloseParams + +start :: (HasBlockchainActions s, AsContractError e) => StartParams -> Contract w s e () +start StartParams{..} = do + pkh <- pubKeyHash <$> ownPubKey + let a = Auction + { aSeller = pkh + , aDeadline = spDeadline + , aMinBid = spMinBid + , aCurrency = spCurrency + , aToken = spToken + } + d = AuctionDatum + { adAuction = a + , adHighestBid = Nothing + } + v = Value.singleton spCurrency spToken 1 + tx = mustPayToTheScript d v + ledgerTx <- submitTxConstraints auctionInstance tx + void $ awaitTxConfirmed $ txId ledgerTx + logInfo @String $ printf "started auction %s for token %s" (show a) (show v) + +bid :: forall w s. HasBlockchainActions s => BidParams -> Contract w s Text () +bid BidParams{..} = do + (oref, o, d@AuctionDatum{..}) <- findAuction bpCurrency bpToken + logInfo @String $ printf "found auction utxo with datum %s" (show d) + + when (bpBid < minBid d) $ + throwError $ pack $ printf "bid lower than minimal bid %d" (minBid d) + pkh <- pubKeyHash <$> ownPubKey + let b = Bid {bBidder = pkh, bBid = bpBid} + d' = d {adHighestBid = Just b} + v = Value.singleton bpCurrency bpToken 1 <> Ada.lovelaceValueOf bpBid + r = Redeemer $ PlutusTx.toData $ MkBid b + + lookups = Constraints.scriptInstanceLookups auctionInstance <> + Constraints.otherScript auctionValidator <> + Constraints.unspentOutputs (Map.singleton oref o) + tx = case adHighestBid of + Nothing -> mustPayToTheScript d' v <> + mustValidateIn (to $ aDeadline adAuction) <> + mustSpendScriptOutput oref r + Just Bid{..} -> mustPayToTheScript d' v <> + mustPayToPubKey bBidder (Ada.lovelaceValueOf bBid) <> + mustValidateIn (to $ aDeadline adAuction) <> + mustSpendScriptOutput oref r + ledgerTx <- submitTxConstraintsWith lookups tx + void $ awaitTxConfirmed $ txId ledgerTx + logInfo @String $ printf "made bid of %d lovelace in auction %s for token (%s, %s)" + bpBid + (show adAuction) + (show bpCurrency) + (show bpToken) + +close :: forall w s. HasBlockchainActions s => CloseParams -> Contract w s Text () +close CloseParams{..} = do + (oref, o, d@AuctionDatum{..}) <- findAuction cpCurrency cpToken + logInfo @String $ printf "found auction utxo with datum %s" (show d) + + let t = Value.singleton cpCurrency cpToken 1 + r = Redeemer $ PlutusTx.toData Close + seller = aSeller adAuction + + lookups = Constraints.scriptInstanceLookups auctionInstance <> + Constraints.otherScript auctionValidator <> + Constraints.unspentOutputs (Map.singleton oref o) + tx = case adHighestBid of + Nothing -> mustPayToPubKey seller t <> + mustValidateIn (from $ aDeadline adAuction) <> + mustSpendScriptOutput oref r + Just Bid{..} -> mustPayToPubKey bBidder t <> + mustPayToPubKey seller (Ada.lovelaceValueOf bBid) <> + mustValidateIn (from $ aDeadline adAuction) <> + mustSpendScriptOutput oref r + ledgerTx <- submitTxConstraintsWith lookups tx + void $ awaitTxConfirmed $ txId ledgerTx + logInfo @String $ printf "closed auction %s for token (%s, %s)" + (show adAuction) + (show cpCurrency) + (show cpToken) + +findAuction :: HasBlockchainActions s + => CurrencySymbol + -> TokenName + -> Contract w s Text (TxOutRef, TxOutTx, AuctionDatum) +findAuction cs tn = do + utxos <- utxoAt $ ScriptAddress auctionHash + let xs = [ (oref, o) + | (oref, o) <- Map.toList utxos + , Value.valueOf (txOutValue $ txOutTxOut o) cs tn == 1 + ] + case xs of + [(oref, o)] -> case txOutType $ txOutTxOut o of + PayToPubKey -> throwError "unexpected out type" + PayToScript h -> case Map.lookup h $ txData $ txOutTxTx o of + Nothing -> throwError "datum not found" + Just (Datum e) -> case PlutusTx.fromData e of + Nothing -> throwError "datum has wrong type" + Just d@AuctionDatum{..} + | aCurrency adAuction == cs && aToken adAuction == tn -> return (oref, o, d) + | otherwise -> throwError "auction token missmatch" + _ -> throwError "auction utxo not found" + +endpoints :: Contract () AuctionSchema Text () +endpoints = (start' `select` bid' `select` close') >> endpoints + where + start' = endpoint @"start" >>= start + bid' = endpoint @"bid" >>= bid + close' = endpoint @"close" >>= close + +mkSchemaDefinitions ''AuctionSchema + +myToken :: KnownCurrency +myToken = KnownCurrency (ValidatorHash "f") "Token" (TokenName "T" :| []) + +mkKnownCurrencies ['myToken]