PTryFrom for Treasury Withdrawal Effect!

agora/Agora/Effect/TreasuryWithdrawal.hs

@@ -15,10 +15,12 @@ module Agora.Effect.TreasuryWithdrawal (
 
 import GHC.Generics qualified as GHC
 import Generics.SOP (Generic, I (I))
+import Control.Applicative (Const)
 
 import Agora.Effect (makeEffect)
 import Agora.Utils (findTxOutByTxOutRef, paddValue, passert)
 import Plutarch (popaque)
+import Plutarch.Internal (punsafeCoerce)
 import Plutarch.Api.V1 (
   PCredential (..),
   PTuple,
@@ -32,6 +34,7 @@ import Plutarch.DataRepr (
   PDataFields,
   PIsDataReprInstances (..),
  )
+import Plutarch.TryFrom ( PTryFrom(..) ) 
 import Plutarch.Lift (PUnsafeLiftDecl (..))
 import Plutarch.Monadic qualified as P
 import Plutus.V1.Ledger.Credential (Credential)
@@ -71,6 +74,13 @@ deriving via
   instance
     (PConstant TreasuryWithdrawalDatum)
 
+instance PTryFrom PData PTreasuryWithdrawalDatum where
+  type PTryFromExcess PData PTreasuryWithdrawalDatum = Const ()
+  ptryFrom' opq cont =
+    -- this will need to not use punsafeCoerce...
+    cont (punsafeCoerce opq, ())
+
+
 {- | Withdraws given list of values to specific target addresses.
      It can be evoked by burning GAT. The transaction should have correct
      outputs to the users and any left overs should be paid back to the treasury.