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started with code for week 2

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Lars Brünjes 2021-04-09 12:21:14 +02:00
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{
"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"
],
}

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dist-newstyle/

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index-state: 2021-02-24T00:00:00Z
packages: ./.
-- You never, ever, want this.
write-ghc-environment-files: never
-- Always build tests and benchmarks.
tests: true
benchmarks: true
source-repository-package
type: git
location: https://github.com/input-output-hk/plutus.git
subdir:
freer-extras
playground-common
plutus-core
plutus-contract
plutus-ledger
plutus-ledger-api
plutus-tx
plutus-tx-plugin
prettyprinter-configurable
tag: 3746610e53654a1167aeb4c6294c6096d16b0502
-- The following sections are copied from the 'plutus' repository cabal.project at the revision
-- given above.
-- This is necessary because the 'plutus' libraries depend on a number of other libraries which are
-- not on Hackage, and so need to be pulled in as `source-repository-package`s themselves. 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

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cradle:
cabal:
- path: "./src"
component: "lib:plutus-pioneer-program-week02"

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code/week02/plutus-pioneer-program-week02.cabal Normal file
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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

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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 #-}
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]