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burn script
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2 changed files with 88 additions and 1 deletions
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@ -10,7 +10,8 @@ License-files: LICENSE
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library
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hs-source-dirs: src
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exposed-modules: Week02.Gift
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exposed-modules: Week02.Burn
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, Week02.Gift
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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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86
code/week02/src/Week02/Burn.hs
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86
code/week02/src/Week02/Burn.hs
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@ -0,0 +1,86 @@
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TypeOperators #-}
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module Week02.Burn
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( burn
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, grab
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, endpoints
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, schemas
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, registeredKnownCurrencies
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, printJson
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, printSchemas
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, ensureKnownCurrencies
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, stage
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) where
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import Control.Monad hiding (fmap)
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import Data.Map as Map
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import Data.Text (Text)
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import Data.Void (Void)
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import Plutus.Contract hiding (when)
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import PlutusTx (Data (..))
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import qualified PlutusTx
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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.Scripts as Scripts
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import Ledger.Ada as Ada
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import Playground.Contract (printJson, printSchemas, ensureKnownCurrencies, stage)
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import Playground.TH (mkKnownCurrencies, mkSchemaDefinitions)
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import Playground.Types (KnownCurrency (..))
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import Prelude (Semigroup (..))
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import Text.Printf (printf)
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{-# INLINABLE mkGiftValidator #-}
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mkGiftValidator :: Data -> Data -> Data -> ()
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mkGiftValidator _ _ _ = traceError "NO WAY!"
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giftValidator :: Validator
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giftValidator = mkValidatorScript $$(PlutusTx.compile [|| mkGiftValidator ||])
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giftHash :: Ledger.ValidatorHash
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giftHash = Scripts.validatorHash giftValidator
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giftAddress :: Ledger.Address
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giftAddress = ScriptAddress giftHash
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type GiftSchema =
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BlockchainActions
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.\/ Endpoint "burn" Integer
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.\/ Endpoint "grab" ()
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burn :: (HasBlockchainActions s, AsContractError e) => Integer -> Contract w s e ()
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burn amount = do
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let tx = mustPayToOtherScript giftHash (Datum $ I 42) $ Ada.lovelaceValueOf amount
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ledgerTx <- submitTx tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ printf "burnt %d lovelace" amount
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grab :: forall w s e. (HasBlockchainActions s, AsContractError e) => Contract w s e ()
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grab = do
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utxos <- utxoAt $ ScriptAddress giftHash
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let orefs = fst <$> Map.toList utxos
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lookups = Constraints.unspentOutputs utxos <>
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Constraints.otherScript giftValidator
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tx :: TxConstraints Void Void
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tx = mconcat [mustSpendScriptOutput oref $ Redeemer $ I 17 | oref <- orefs]
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ledgerTx <- submitTxConstraintsWith @Void lookups tx
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void $ awaitTxConfirmed $ txId ledgerTx
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logInfo @String $ "collected gifts"
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endpoints :: Contract () GiftSchema Text ()
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endpoints = (give' `select` grab') >> endpoints
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where
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give' = endpoint @"burn" >>= burn
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grab' = endpoint @"grab" >> grab
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mkSchemaDefinitions ''GiftSchema
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mkKnownCurrencies []
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