mirror of
https://github.com/FiloSpaTeam/plutus-pioneer-program.git
synced 2024-11-14 02:42:35 +01:00
swap contract with tests
This commit is contained in:
Lars Brünjes
parent
bb2e6ee45b
commit
e5fa37a0b5
4 changed files with 125 additions and 37 deletions
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@ -17,6 +17,7 @@ library
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build-depends: aeson
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, base ^>=4.14.1.0
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, containers
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, data-default
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, freer-extras
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, playground-common
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, plutus-contract
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@ -38,7 +38,6 @@ import PlutusTx.Prelude hiding (Semigroup(..), unless)
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import Ledger hiding (singleton)
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import Ledger.Constraints as Constraints
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import qualified Ledger.Typed.Scripts as Scripts
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import Ledger.Ada as Ada
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import Ledger.Value as Value
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import Plutus.Contracts.Currency as Currency
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import Prelude (Semigroup (..))
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@ -46,7 +45,7 @@ import Prelude (Semigroup (..))
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data Oracle = Oracle
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{ oSymbol :: !CurrencySymbol
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, oOperator :: !PubKeyHash
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, oFee :: !Value
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, oFee :: !Integer
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, oAsset :: !AssetClass
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} deriving (Show, Generic, FromJSON, ToJSON)
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@ -74,7 +73,7 @@ oracleValue o f = do
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{-# INLINABLE mkOracleValidator #-}
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mkOracleValidator :: Oracle -> Integer -> OracleRedeemer -> ScriptContext -> Bool
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mkOracleValidator _ _ Use _ = False
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mkOracleValidator _ _ Use _ = True
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mkOracleValidator oracle _ Update ctx =
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traceIfFalse "operator signature missing" (txSignedBy info $ oOperator oracle) &&
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traceIfFalse "token missing from input" inputHasToken &&
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@ -134,7 +133,7 @@ startOracle op = do
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oracle = Oracle
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{ oSymbol = cs
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, oOperator = pkh
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, oFee = Ada.lovelaceValueOf $ opFees op
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, oFee = opFees op
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, oAsset = AssetClass (opSymbol op, opToken op)
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}
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logInfo @String $ "forged oracle state token for oracle " ++ show oracle
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@ -14,27 +14,35 @@
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module Week06.Oracle.Swap
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( offerSwap
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, retrieveSwaps
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, useSwap
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) where
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import Control.Monad hiding (fmap)
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import Data.Aeson (FromJSON, ToJSON)
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import Data.List (find)
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import qualified Data.Map as Map
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import Data.Maybe (mapMaybe)
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import Data.Monoid (Last (..))
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import Data.Text (Text, pack)
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import GHC.Generics (Generic)
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import Data.Text (Text)
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import Plutus.Contract as Contract hiding (when)
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import qualified PlutusTx
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import PlutusTx.Prelude hiding (Semigroup(..), unless, mapMaybe)
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import PlutusTx.Prelude hiding (Semigroup(..), (<$>), unless, mapMaybe, find)
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import Ledger hiding (singleton)
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import Ledger.Constraints as Constraints
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import qualified Ledger.Typed.Scripts as Scripts
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import Ledger.Ada as Ada
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import Ledger.Ada as Ada hiding (divide)
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import Ledger.Value as Value
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import Prelude (Semigroup (..))
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import Prelude (Semigroup (..), (<$>))
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import Week06.Oracle.Core
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{-# INLINABLE price #-}
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price :: Integer -> Integer -> Integer
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price lovelace exchangeRate = (lovelace * exchangeRate) `divide` 1000000
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{-# INLINABLE lovelaces #-}
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lovelaces :: Value -> Integer
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lovelaces = Ada.getLovelace . Ada.fromValue
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{-# INLINABLE mkSwapValidator #-}
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mkSwapValidator :: Oracle -> Address -> PubKeyHash -> () -> ScriptContext -> Bool
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mkSwapValidator oracle addr pkh () ctx =
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@ -75,9 +83,9 @@ mkSwapValidator oracle addr pkh () ctx =
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let
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lovelaceIn = case findOwnInput ctx of
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Nothing -> traceError "own input not found"
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Just i -> Ada.getLovelace $ Ada.fromValue $ txOutValue $ txInInfoResolved i
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Just i -> lovelaces $ txOutValue $ txInInfoResolved i
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in
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lovelaceIn * oracleValue'
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price lovelaceIn oracleValue'
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sellerPaid :: Bool
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sellerPaid =
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@ -145,3 +153,49 @@ retrieveSwaps oracle = do
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ledgerTx <- submitTxConstraintsWith @Swapping lookups tx
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awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ "retrieved " ++ show (length xs) ++ " swap(s)"
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ownFunds :: HasBlockchainActions s => Contract w s Text Value
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ownFunds = do
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pk <- ownPubKey
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utxos <- utxoAt $ pubKeyAddress pk
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let v = mconcat $ Map.elems $ txOutValue . txOutTxOut <$> utxos
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logInfo @String $ "own funds: " ++ show (Value.flattenValue v)
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return v
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useSwap :: forall w s. HasBlockchainActions s => Oracle -> Contract w s Text ()
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useSwap oracle = do
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funds <- ownFunds
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let amt = assetClassValueOf funds $ oAsset oracle
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logInfo @String $ "available assets: " ++ show amt
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m <- findOracle oracle
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case m of
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Nothing -> logInfo @String "oracle not found"
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Just (oref, o, x) -> do
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logInfo @String $ "found oracle, exchange rate " ++ show x
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pkh <- pubKeyHash <$> Contract.ownPubKey
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swaps <- findSwaps oracle (/= pkh)
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case find (f amt x) swaps of
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Nothing -> logInfo @String "no suitable swap found"
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Just (oref', o', pkh') -> do
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let v = txOutValue (txOutTxOut o) <> lovelaceValueOf (oFee oracle)
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p = assetClassValue (oAsset oracle) $ price (lovelaces $ txOutValue $ txOutTxOut o') x
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lookups = Constraints.otherScript (swapValidator oracle) <>
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Constraints.otherScript (oracleValidator oracle) <>
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Constraints.unspentOutputs (Map.fromList [(oref, o), (oref', o')])
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tx = Constraints.mustSpendScriptOutput oref (Redeemer $ PlutusTx.toData Use) <>
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Constraints.mustSpendScriptOutput oref' (Redeemer $ PlutusTx.toData ()) <>
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Constraints.mustPayToOtherScript
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(validatorHash $ oracleValidator oracle)
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(Datum $ PlutusTx.toData x)
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v <>
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Constraints.mustPayToPubKey pkh' p
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ledgerTx <- submitTxConstraintsWith @Swapping lookups tx
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awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ "made swap with price " ++ show (Value.flattenValue p)
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where
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getPrice :: Integer -> TxOutTx -> Integer
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getPrice x o = price (lovelaces $ txOutValue $ txOutTxOut o) x
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f :: Integer -> Integer -> (TxOutRef, TxOutTx, PubKeyHash) -> Bool
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f amt x (_, o, _) = getPrice x o <= amt
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@ -4,6 +4,7 @@
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE NumericUnderscores #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TemplateHaskell #-}
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@ -13,20 +14,39 @@
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module Week06.Oracle.Test where
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import Control.Monad hiding (fmap)
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import Control.Monad.Freer.Extras as Extras
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import Data.Monoid (Last (..))
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import Data.Text (Text)
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import Plutus.Contract as Contract hiding (when)
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import Plutus.Trace.Emulator as Emulator
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import PlutusTx.Prelude hiding (Semigroup(..), unless)
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import Wallet.Emulator.Wallet
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import Control.Monad hiding (fmap)
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import Control.Monad.Freer.Extras as Extras
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import Data.Default (Default (..))
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import qualified Data.Map as Map
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import Data.Monoid (Last (..))
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import Data.Text (Text)
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import Ledger
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import Ledger.Value as Value
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import Ledger.Ada as Ada
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import Plutus.Contract as Contract hiding (when)
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import Plutus.Trace.Emulator as Emulator
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import PlutusTx.Prelude hiding (Semigroup(..), unless)
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import Prelude (Semigroup(..))
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import Wallet.Emulator.Wallet
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import Week06.Oracle.Core
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import Week06.Oracle.Swap
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import Week06.Oracle.Core
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import Week06.Oracle.Swap
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assetSymbol :: CurrencySymbol
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assetSymbol = "ff"
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assetToken :: TokenName
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assetToken = "USDT"
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test :: IO ()
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test = runEmulatorTraceIO myTrace
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test = runEmulatorTraceIO' def emCfg myTrace
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where
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emCfg :: EmulatorConfig
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emCfg = EmulatorConfig $ Left $ Map.fromList [(Wallet i, v) | i <- [1 .. 10]]
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v :: Value
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v = Ada.lovelaceValueOf 100_000_000 <>
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Value.singleton assetSymbol assetToken 100_000_000
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checkOracle :: Oracle -> Contract () BlockchainActions Text a
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checkOracle oracle = do
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@ -39,25 +59,39 @@ checkOracle oracle = do
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myTrace :: EmulatorTrace ()
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myTrace = do
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let op = OracleParams
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{ opFees = 1000000
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, opSymbol = "ff"
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, opToken = "USDT"
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{ opFees = 1_000_000
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, opSymbol = assetSymbol
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, opToken = assetToken
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}
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h <- activateContractWallet (Wallet 1) $ runOracle op
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void $ Emulator.waitNSlots 1
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oracle <- getOracle h
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void $ activateContractWallet (Wallet 2) $ checkOracle oracle
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callEndpoint @"update" h 42
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void $ Emulator.waitNSlots 3
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callEndpoint @"update" h 666
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void $ Emulator.waitNSlots 10
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void $ activateContractWallet (Wallet 2) (offerSwap oracle 12000000 :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 10
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void $ activateContractWallet (Wallet 2) (offerSwap oracle 18000000 :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 10
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void $ activateContractWallet (Wallet 2) (retrieveSwaps oracle :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 10
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void $ activateContractWallet (Wallet 2) $ checkOracle oracle
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callEndpoint @"update" h 1_500_000
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void $ Emulator.waitNSlots 3
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void $ activateContractWallet (Wallet 3) (offerSwap oracle 10_000_000 :: Contract () BlockchainActions Text ())
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void $ activateContractWallet (Wallet 4) (offerSwap oracle 20_000_000 :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 3
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void $ activateContractWallet (Wallet 5) (useSwap oracle :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 3
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callEndpoint @"update" h 1_700_000
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void $ Emulator.waitNSlots 3
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void $ activateContractWallet (Wallet 5) (useSwap oracle :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 3
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callEndpoint @"update" h 1_800_000
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void $ Emulator.waitNSlots 3
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void $ activateContractWallet (Wallet 3) (retrieveSwaps oracle :: Contract () BlockchainActions Text ())
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void $ activateContractWallet (Wallet 4) (retrieveSwaps oracle :: Contract () BlockchainActions Text ())
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void $ Emulator.waitNSlots 3
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where
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getOracle :: ContractHandle (Last Oracle) OracleSchema Text -> EmulatorTrace Oracle
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