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sample solution for homework from week 8
This commit is contained in:
Lars Brünjes
parent
99cbc0b8ca
commit
9c86f2370b
3 changed files with 81 additions and 47 deletions
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@ -54,6 +54,7 @@ data TSRedeemer =
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| AddTokens Integer
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| BuyTokens Integer
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| Withdraw Integer Integer
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| Close
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deriving (Show, Prelude.Eq)
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PlutusTx.unstableMakeIsData ''TSRedeemer
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@ -63,54 +64,58 @@ lovelaces :: Value -> Integer
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lovelaces = Ada.getLovelace . Ada.fromValue
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{-# INLINABLE transition #-}
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transition :: TokenSale -> State Integer -> TSRedeemer -> Maybe (TxConstraints Void Void, State Integer)
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transition :: TokenSale -> State (Maybe Integer) -> TSRedeemer -> Maybe (TxConstraints Void Void, State (Maybe Integer))
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transition ts s r = case (stateValue s, stateData s, r) of
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(v, _, SetPrice p) | p >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
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, State p $
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v <>
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nft (negate 1)
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)
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(v, p, AddTokens n) | n > 0 -> Just ( mempty
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, State p $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) n
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)
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(v, p, BuyTokens n) | n > 0 -> Just ( mempty
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, State p $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) (negate n) <>
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lovelaceValueOf (n * p)
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)
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(v, p, Withdraw n l) | n >= 0 && l >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
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, State p $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) (negate n) <>
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lovelaceValueOf (negate l)
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)
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_ -> Nothing
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(v, Just _, SetPrice p) | p >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
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, State (Just p) $
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v <>
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nft (negate 1)
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)
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(v, Just p, AddTokens n) | n > 0 -> Just ( mempty
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, State (Just p) $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) n
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)
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(v, Just p, BuyTokens n) | n > 0 -> Just ( mempty
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, State (Just p) $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) (negate n) <>
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lovelaceValueOf (n * p)
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)
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(v, Just p, Withdraw n l) | n >= 0 && l >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
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, State (Just p) $
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v <>
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nft (negate 1) <>
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assetClassValue (tsToken ts) (negate n) <>
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lovelaceValueOf (negate l)
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)
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(_, Just _, Close) -> Just ( Constraints.mustBeSignedBy (tsSeller ts)
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, State Nothing $
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mempty
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)
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_ -> Nothing
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where
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nft :: Integer -> Value
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nft = assetClassValue (tsNFT ts)
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{-# INLINABLE tsStateMachine #-}
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tsStateMachine :: TokenSale -> StateMachine Integer TSRedeemer
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tsStateMachine ts = mkStateMachine (Just $ tsNFT ts) (transition ts) (const False)
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tsStateMachine :: TokenSale -> StateMachine (Maybe Integer) TSRedeemer
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tsStateMachine ts = mkStateMachine (Just $ tsNFT ts) (transition ts) isNothing
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{-# INLINABLE mkTSValidator #-}
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mkTSValidator :: TokenSale -> Integer -> TSRedeemer -> ScriptContext -> Bool
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mkTSValidator :: TokenSale -> Maybe Integer -> TSRedeemer -> ScriptContext -> Bool
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mkTSValidator = mkValidator . tsStateMachine
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type TS = StateMachine Integer TSRedeemer
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type TS = StateMachine (Maybe Integer) TSRedeemer
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tsInst :: TokenSale -> Scripts.ScriptInstance TS
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tsInst ts = Scripts.validator @TS
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($$(PlutusTx.compile [|| mkTSValidator ||]) `PlutusTx.applyCode` PlutusTx.liftCode ts)
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$$(PlutusTx.compile [|| wrap ||])
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where
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wrap = Scripts.wrapValidator @Integer @TSRedeemer
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wrap = Scripts.wrapValidator @(Maybe Integer) @TSRedeemer
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tsValidator :: TokenSale -> Validator
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tsValidator = Scripts.validatorScript . tsInst
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@ -118,7 +123,7 @@ tsValidator = Scripts.validatorScript . tsInst
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tsAddress :: TokenSale -> Ledger.Address
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tsAddress = scriptAddress . tsValidator
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tsClient :: TokenSale -> StateMachineClient Integer TSRedeemer
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tsClient :: TokenSale -> StateMachineClient (Maybe Integer) TSRedeemer
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tsClient ts = mkStateMachineClient $ StateMachineInstance (tsStateMachine ts) (tsInst ts)
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mapErrorC :: Contract w s C.CurrencyError a -> Contract w s Text a
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@ -142,7 +147,7 @@ startTS mcs token = do
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, tsNFT = AssetClass (cs, nftName)
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}
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client = tsClient ts
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void $ mapErrorSM $ runInitialise client 0 mempty
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void $ mapErrorSM $ runInitialise client (Just 0) mempty
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tell $ Last $ Just ts
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logInfo $ "started token sale " ++ show ts
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return ts
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@ -159,6 +164,9 @@ buyTokens ts n = void $ mapErrorSM $ runStep (tsClient ts) $ BuyTokens n
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withdraw :: HasBlockchainActions s => TokenSale -> Integer -> Integer -> Contract w s Text ()
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withdraw ts n l = void $ mapErrorSM $ runStep (tsClient ts) $ Withdraw n l
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close :: HasBlockchainActions s => TokenSale -> Contract w s Text ()
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close ts = void $ mapErrorSM $ runStep (tsClient ts) Close
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type TSStartSchema = BlockchainActions
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.\/ Endpoint "start" (CurrencySymbol, TokenName)
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type TSStartSchema' = BlockchainActions
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@ -168,6 +176,7 @@ type TSUseSchema = BlockchainActions
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.\/ Endpoint "add tokens" Integer
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.\/ Endpoint "buy tokens" Integer
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.\/ Endpoint "withdraw" (Integer, Integer)
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.\/ Endpoint "close" ()
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startEndpoint :: Contract (Last TokenSale) TSStartSchema Text ()
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startEndpoint = startTS' >> startEndpoint
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@ -180,9 +189,10 @@ startEndpoint' = startTS' >> startEndpoint'
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startTS' = handleError logError $ endpoint @"start" >>= \(cs1, cs2, tn) -> void $ startTS (Just cs1) $ AssetClass (cs2, tn)
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useEndpoints :: TokenSale -> Contract () TSUseSchema Text ()
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useEndpoints ts = (setPrice' `select` addTokens' `select` buyTokens' `select` withdraw') >> useEndpoints ts
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useEndpoints ts = (setPrice' `select` addTokens' `select` buyTokens' `select` withdraw' `select` close') >> useEndpoints ts
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where
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setPrice' = handleError logError $ endpoint @"set price" >>= setPrice ts
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addTokens' = handleError logError $ endpoint @"add tokens" >>= addTokens ts
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buyTokens' = handleError logError $ endpoint @"buy tokens" >>= buyTokens ts
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withdraw' = handleError logError $ endpoint @"withdraw" >>= uncurry (withdraw ts)
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close' = handleError logError $ endpoint @"close" >> close ts
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@ -64,6 +64,7 @@ instance ContractModel TSModel where
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| AddTokens Wallet Wallet Integer
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| Withdraw Wallet Wallet Integer Integer
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| BuyTokens Wallet Wallet Integer
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| Close Wallet Wallet
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deriving (Show, Eq)
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data ContractInstanceKey TSModel w s e where
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@ -77,7 +78,8 @@ instance ContractModel TSModel where
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[ SetPrice <$> genWallet <*> genWallet <*> genNonNeg ] ++
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[ AddTokens <$> genWallet <*> genWallet <*> genNonNeg ] ++
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[ BuyTokens <$> genWallet <*> genWallet <*> genNonNeg ] ++
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[ Withdraw <$> genWallet <*> genWallet <*> genNonNeg <*> genNonNeg ]
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[ Withdraw <$> genWallet <*> genWallet <*> genNonNeg <*> genNonNeg ] ++
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[ Close <$> genWallet <*> genWallet ]
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initialState = TSModel Map.empty
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@ -128,18 +130,32 @@ instance ContractModel TSModel where
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_ -> return ()
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wait 1
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nextState (Close v w) = do
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when (v == w) $ do
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m <- getTSState v
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case m of
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Just t -> do
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deposit w $ lovelaceValueOf (t ^. tssLovelace) <>
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assetClassValue (tokens Map.! w) (t ^. tssToken) <>
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(nfts Map.! w)
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(tsModel . at v) $= Nothing
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_ -> return ()
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wait 1
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perform h _ cmd = case cmd of
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(Start w) -> callEndpoint @"start" (h $ StartKey w) (nftCurrencies Map.! w, tokenCurrencies Map.! w, tokenNames Map.! w) >> delay 1
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(SetPrice v w p) -> callEndpoint @"set price" (h $ UseKey v w) p >> delay 1
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(AddTokens v w n) -> callEndpoint @"add tokens" (h $ UseKey v w) n >> delay 1
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(BuyTokens v w n) -> callEndpoint @"buy tokens" (h $ UseKey v w) n >> delay 1
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(Withdraw v w n l) -> callEndpoint @"withdraw" (h $ UseKey v w) (n, l) >> delay 1
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(Close v w) -> callEndpoint @"close" (h $ UseKey v w) () >> delay 1
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precondition s (Start w) = isNothing $ getTSState' s w
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precondition s (SetPrice v _ _) = isJust $ getTSState' s v
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precondition s (AddTokens v _ _) = isJust $ getTSState' s v
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precondition s (BuyTokens v _ _) = isJust $ getTSState' s v
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precondition s (Withdraw v _ _ _) = isJust $ getTSState' s v
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precondition s (Close v _) = isJust $ getTSState' s v
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deriving instance Eq (ContractInstanceKey TSModel w s e)
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deriving instance Show (ContractInstanceKey TSModel w s e)
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@ -38,7 +38,7 @@ tests :: TestTree
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tests = checkPredicateOptions
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(defaultCheckOptions & emulatorConfig .~ emCfg)
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"token sale trace"
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( walletFundsChange (Wallet 1) (Ada.lovelaceValueOf 10_000_000 <> assetClassValue token (-60))
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( walletFundsChange (Wallet 1) (Ada.lovelaceValueOf 25_000_000 <> assetClassValue token (-25))
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.&&. walletFundsChange (Wallet 2) (Ada.lovelaceValueOf (-20_000_000) <> assetClassValue token 20)
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.&&. walletFundsChange (Wallet 3) (Ada.lovelaceValueOf (- 5_000_000) <> assetClassValue token 5)
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)
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@ -48,24 +48,31 @@ runMyTrace :: IO ()
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runMyTrace = runEmulatorTraceIO' def emCfg myTrace
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emCfg :: EmulatorConfig
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emCfg = EmulatorConfig $ Left $ Map.fromList [(Wallet w, v) | w <- [1 .. 3]]
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emCfg = EmulatorConfig $ Left $ Map.fromList [(Wallet w, v' w) | w <- [1 .. 3]]
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where
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v :: Value
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v = Ada.lovelaceValueOf 1000_000_000 <> assetClassValue token 1000
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currency :: CurrencySymbol
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currency = "aa"
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v' :: Integer -> Value
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v' w
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| w == 1 = v <> assetClassValue nft 1
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| otherwise = v
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name :: TokenName
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name = "A"
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tokenCurrency, nftCurrency :: CurrencySymbol
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tokenCurrency = "aa"
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nftCurrency = "01"
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token :: AssetClass
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token = AssetClass (currency, name)
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tokenName' :: TokenName
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tokenName' = "A"
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token, nft :: AssetClass
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token = AssetClass (tokenCurrency, tokenName')
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nft = AssetClass (nftCurrency, nftName)
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myTrace :: EmulatorTrace ()
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myTrace = do
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h <- activateContractWallet (Wallet 1) startEndpoint
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callEndpoint @"start" h (currency, name)
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h <- activateContractWallet (Wallet 1) startEndpoint'
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callEndpoint @"start" h (nftCurrency, tokenCurrency, tokenName')
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void $ Emulator.waitNSlots 5
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Last m <- observableState h
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case m of
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@ -89,5 +96,6 @@ myTrace = do
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callEndpoint @"buy tokens" h3 5
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void $ Emulator.waitNSlots 5
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callEndpoint @"withdraw" h1 (40, 10_000_000)
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callEndpoint @"close" h1 ()
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-- callEndpoint @"withdraw" h1 (40, 10_000_000)
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void $ Emulator.waitNSlots 5
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