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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,184 @@ | ||
| {-# LANGUAGE DataKinds #-} | ||
| {-# LANGUAGE DeriveAnyClass #-} | ||
| {-# LANGUAGE DeriveGeneric #-} | ||
| {-# LANGUAGE FlexibleContexts #-} | ||
| {-# LANGUAGE MultiParamTypeClasses #-} | ||
| {-# LANGUAGE NoImplicitPrelude #-} | ||
| {-# LANGUAGE OverloadedStrings #-} | ||
| {-# LANGUAGE ScopedTypeVariables #-} | ||
| {-# LANGUAGE TemplateHaskell #-} | ||
| {-# LANGUAGE TypeApplications #-} | ||
| {-# LANGUAGE TypeFamilies #-} | ||
| {-# LANGUAGE TypeOperators #-} | ||
|
|
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| module Week08.TokenSaleWithClose | ||
| ( TokenSale (..) | ||
| , TSRedeemer (..) | ||
| , TSStartSchema | ||
| , TSUseSchema | ||
| , startEndpoint | ||
| , useEndpoints | ||
| , useEndpoints' | ||
| ) where | ||
|
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||
| import Control.Monad hiding (fmap) | ||
| import Data.Aeson (FromJSON, ToJSON) | ||
| import Data.Monoid (Last (..)) | ||
| import Data.Text (Text, pack) | ||
| import GHC.Generics (Generic) | ||
| import Plutus.Contract as Contract | ||
| import Plutus.Contract.StateMachine | ||
| import qualified PlutusTx | ||
| import PlutusTx.Prelude hiding (Semigroup(..), check, unless) | ||
| import Ledger hiding (singleton) | ||
| import Ledger.Ada as Ada | ||
| import Ledger.Constraints as Constraints | ||
| import qualified Ledger.Typed.Scripts as Scripts | ||
| import Ledger.Value | ||
| import Prelude (Semigroup (..), Show (..)) | ||
| import qualified Prelude | ||
|
|
||
| data TokenSale = TokenSale | ||
| { tsSeller :: !PaymentPubKeyHash | ||
| , tsToken :: !AssetClass | ||
| , tsTT :: !ThreadToken | ||
| } deriving (Show, Generic, FromJSON, ToJSON, Prelude.Eq) | ||
|
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| PlutusTx.makeLift ''TokenSale | ||
|
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| data TSRedeemer = | ||
| SetPrice Integer | ||
| | AddTokens Integer | ||
| | BuyTokens Integer | ||
| | Withdraw Integer Integer | ||
| | Close | ||
| deriving (Show, Prelude.Eq) | ||
|
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| PlutusTx.unstableMakeIsData ''TSRedeemer | ||
|
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| {-# INLINABLE lovelaces #-} | ||
| lovelaces :: Value -> Integer | ||
| lovelaces = Ada.getLovelace . Ada.fromValue | ||
|
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| {-# INLINABLE transition #-} | ||
| transition :: TokenSale -> State (Maybe Integer) -> TSRedeemer -> Maybe (TxConstraints Void Void, State (Maybe Integer)) | ||
| transition ts s r = case (stateValue s, stateData s, r) of | ||
| (v, Just _, SetPrice p) | p >= 0 -> Just ( Constraints.mustBeSignedBy (tsSeller ts) | ||
| , State (Just p) v | ||
| ) | ||
| (v, Just p, AddTokens n) | n > 0 -> Just ( mempty | ||
| , State (Just p) $ | ||
| v <> | ||
| assetClassValue (tsToken ts) n | ||
| ) | ||
| (v, Just p, BuyTokens n) | n > 0 -> Just ( mempty | ||
| , State (Just p) $ | ||
| v <> | ||
| assetClassValue (tsToken ts) (negate n) <> | ||
| lovelaceValueOf (n * p) | ||
| ) | ||
| (v, Just p, Withdraw n l) | n >= 0 && l >= 0 && | ||
| v `geq` (w <> toValue minAdaTxOut) -> Just ( Constraints.mustBeSignedBy (tsSeller ts) | ||
| , State (Just p) $ | ||
| v <> | ||
| negate w | ||
| ) | ||
| where | ||
| w = assetClassValue (tsToken ts) n <> | ||
| lovelaceValueOf l | ||
| (_, Just _, Close) -> Just ( Constraints.mustBeSignedBy (tsSeller ts) | ||
| , State Nothing mempty | ||
| ) | ||
| _ -> Nothing | ||
|
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||
| {-# INLINABLE tsStateMachine #-} | ||
| tsStateMachine :: TokenSale -> StateMachine (Maybe Integer) TSRedeemer | ||
| tsStateMachine ts = mkStateMachine (Just $ tsTT ts) (transition ts) isNothing | ||
|
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| {-# INLINABLE mkTSValidator #-} | ||
| mkTSValidator :: TokenSale -> Maybe Integer -> TSRedeemer -> ScriptContext -> Bool | ||
| mkTSValidator = mkValidator . tsStateMachine | ||
|
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| type TS = StateMachine (Maybe Integer) TSRedeemer | ||
|
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| tsTypedValidator :: TokenSale -> Scripts.TypedValidator TS | ||
| tsTypedValidator ts = Scripts.mkTypedValidator @TS | ||
| ($$(PlutusTx.compile [|| mkTSValidator ||]) `PlutusTx.applyCode` PlutusTx.liftCode ts) | ||
| $$(PlutusTx.compile [|| wrap ||]) | ||
| where | ||
| wrap = Scripts.wrapValidator @(Maybe Integer) @TSRedeemer | ||
|
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| tsValidator :: TokenSale -> Validator | ||
| tsValidator = Scripts.validatorScript . tsTypedValidator | ||
|
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| tsAddress :: TokenSale -> Ledger.Address | ||
| tsAddress = scriptAddress . tsValidator | ||
|
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| tsClient :: TokenSale -> StateMachineClient (Maybe Integer) TSRedeemer | ||
| tsClient ts = mkStateMachineClient $ StateMachineInstance (tsStateMachine ts) (tsTypedValidator ts) | ||
|
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| mapErrorSM :: Contract w s SMContractError a -> Contract w s Text a | ||
| mapErrorSM = mapError $ pack . show | ||
|
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| startTS :: AssetClass -> Contract (Last TokenSale) s Text () | ||
| startTS token = do | ||
| pkh <- Contract.ownPaymentPubKeyHash | ||
| tt <- mapErrorSM getThreadToken | ||
| let ts = TokenSale | ||
| { tsSeller = pkh | ||
| , tsToken = token | ||
| , tsTT = tt | ||
| } | ||
| client = tsClient ts | ||
| void $ mapErrorSM $ runInitialise client (Just 0) mempty | ||
| tell $ Last $ Just ts | ||
| logInfo $ "started token sale " ++ show ts | ||
|
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| setPrice :: TokenSale -> Integer -> Contract w s Text () | ||
| setPrice ts p = void $ mapErrorSM $ runStep (tsClient ts) $ SetPrice p | ||
|
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| addTokens :: TokenSale -> Integer -> Contract w s Text () | ||
| addTokens ts n = void (mapErrorSM $ runStep (tsClient ts) $ AddTokens n) | ||
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| buyTokens :: TokenSale -> Integer -> Contract w s Text () | ||
| buyTokens ts n = void $ mapErrorSM $ runStep (tsClient ts) $ BuyTokens n | ||
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| withdraw :: TokenSale -> Integer -> Integer -> Contract w s Text () | ||
| withdraw ts n l = void $ mapErrorSM $ runStep (tsClient ts) $ Withdraw n l | ||
|
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| close :: TokenSale -> Contract w s Text () | ||
| close ts = void $ mapErrorSM $ runStep (tsClient ts) Close | ||
|
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| type TSStartSchema = | ||
| Endpoint "start" (CurrencySymbol, TokenName) | ||
| type TSUseSchema = | ||
| Endpoint "set price" Integer | ||
| .\/ Endpoint "add tokens" Integer | ||
| .\/ Endpoint "buy tokens" Integer | ||
| .\/ Endpoint "withdraw" (Integer, Integer) | ||
| .\/ Endpoint "close" () | ||
|
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| startEndpoint :: Contract (Last TokenSale) TSStartSchema Text () | ||
| startEndpoint = forever | ||
| $ handleError logError | ||
| $ awaitPromise | ||
| $ endpoint @"start" $ startTS . AssetClass | ||
|
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| useEndpoints' :: ( HasEndpoint "set price" Integer s | ||
| , HasEndpoint "add tokens" Integer s | ||
| , HasEndpoint "buy tokens" Integer s | ||
| , HasEndpoint "withdraw" (Integer, Integer) s | ||
| , HasEndpoint "close" () s | ||
| ) | ||
| => TokenSale | ||
| -> Promise () s Text () | ||
| useEndpoints' ts = setPrice' `select` addTokens' `select` buyTokens' `select` withdraw' `select` close' | ||
| where | ||
| setPrice' = endpoint @"set price" $ \p -> handleError logError (setPrice ts p) | ||
| addTokens' = endpoint @"add tokens" $ \n -> handleError logError (addTokens ts n) | ||
| buyTokens' = endpoint @"buy tokens" $ \n -> handleError logError (buyTokens ts n) | ||
| withdraw' = endpoint @"withdraw" $ \(n, l) -> handleError logError (withdraw ts n l) | ||
| close' = endpoint @"close" $ \() -> handleError logError (close ts) | ||
|
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| useEndpoints :: TokenSale -> Contract () TSUseSchema Text () | ||
| useEndpoints = forever . awaitPromise . useEndpoints' |
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