101 lines
3 KiB
Haskell
101 lines
3 KiB
Haskell
{-# LANGUAGE TemplateHaskell #-}
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{- |
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Module: Agora.Treasury
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Maintainer: jack@mlabs.city
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Description: Treasury scripts.
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Contains the datum, redeemer and validator for a template DAO
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treasury.
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-}
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module Agora.Treasury (module Agora.Treasury) where
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import Agora.AuthorityToken (singleAuthorityTokenBurned)
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import Agora.Utils (passert)
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import GHC.Generics qualified as GHC
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import Generics.SOP
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import Plutarch.Api.V1 (PValidator)
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import Plutarch.Api.V1.Contexts (PScriptPurpose (PMinting))
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import Plutarch.Api.V1.Value (PValue)
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import Plutarch.DataRepr (
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DerivePConstantViaData (..),
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PIsDataReprInstances (PIsDataReprInstances),
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)
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import Plutarch.Lift (PConstantDecl (..), PLifted (..), PUnsafeLiftDecl)
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import Plutarch.Monadic qualified as P
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import Plutarch.TryFrom (PTryFrom, ptryFrom)
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import Plutus.V1.Ledger.Value (CurrencySymbol)
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import PlutusTx qualified
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--------------------------------------------------------------------------------
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-- | Redeemer for Treasury actions.
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data TreasuryRedeemer
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= -- | Allow transaction to pass by delegating to GAT burn.
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SpendTreasuryGAT
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deriving stock (Eq, Show, GHC.Generic)
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PlutusTx.makeIsDataIndexed
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''TreasuryRedeemer
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[ ('SpendTreasuryGAT, 0)
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]
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--------------------------------------------------------------------------------
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{- | Plutarch level type representing valid redeemers of the
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treasury.
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-}
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newtype PTreasuryRedeemer (s :: S)
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= -- | Alters treasury parameters, subject to the burning of a
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-- governance authority token.
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PSpendTreasuryGAT (Term s (PDataRecord '[]))
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deriving stock (GHC.Generic)
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deriving anyclass (Generic, PIsDataRepr)
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deriving
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(PlutusType, PIsData)
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via PIsDataReprInstances PTreasuryRedeemer
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deriving via
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PAsData (PIsDataReprInstances PTreasuryRedeemer)
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instance
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PTryFrom PData (PAsData PTreasuryRedeemer)
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instance PUnsafeLiftDecl PTreasuryRedeemer where
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type PLifted PTreasuryRedeemer = TreasuryRedeemer
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deriving via
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(DerivePConstantViaData TreasuryRedeemer PTreasuryRedeemer)
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instance
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(PConstantDecl TreasuryRedeemer)
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--------------------------------------------------------------------------------
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{- | Validator ensuring that transactions consuming the treasury
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do so in a valid manner.
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-}
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treasuryValidator ::
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CurrencySymbol ->
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ClosedTerm PValidator
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treasuryValidator gatCs' = plam $ \_datum redeemer ctx' -> P.do
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(treasuryRedeemer, _) <- ptryFrom redeemer
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-- plet required fields from script context.
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ctx <- pletFields @["txInfo", "purpose"] ctx'
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-- Ensure that script is for burning i.e. minting a negative amount.
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PMinting _ <- pmatch ctx.purpose
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-- Ensure redeemer type is valid.
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PSpendTreasuryGAT _ <- pmatch $ pfromData treasuryRedeemer
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-- Get the minted value from txInfo.
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txInfo' <- plet ctx.txInfo
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txInfo <- pletFields @'["mint"] txInfo'
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let mint :: Term _ PValue
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mint = txInfo.mint
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gatCs <- plet $ pconstant gatCs'
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passert "A single authority token has been burned" $
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singleAuthorityTokenBurned gatCs txInfo' mint
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popaque $ pconstant ()
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