Alonzo UTXOW examples

IntersectMBO · Apr 2, 2021 · 42a4fcc · 42a4fcc
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diff --git a/alonzo/impl/cardano-ledger-alonzo.cabal b/alonzo/impl/cardano-ledger-alonzo.cabal
@@ -100,15 +100,27 @@ test-suite tests
     test/test
   other-modules:
     Test.Cardano.Ledger.Alonzo.Serialisation.Tripping
+    Test.Cardano.Ledger.Alonzo.Examples.Utxow
   build-depends:
     base16-bytestring,
     bytestring,
     cardano-binary,
     cardano-ledger-alonzo,
+    cardano-ledger-core,
+    cardano-ledger-shelley-ma,
     cardano-ledger-shelley-ma-test,
+    containers,
+    data-default-class,
+    plutus-core,
+    plutus-tx,
+    plutus-ledger-api,
     QuickCheck,
+    small-steps,
+    small-steps-test,
     shelley-spec-ledger,
     shelley-spec-ledger-test,
+    strict-containers,
+    tasty-hunit,
     tasty-quickcheck,
     tasty,
     test
diff --git a/alonzo/impl/src/Cardano/Ledger/Alonzo/FakePlutus.hs b/alonzo/impl/src/Cardano/Ledger/Alonzo/FakePlutus.hs
@@ -109,5 +109,7 @@ data ScriptPurpose
 data Context = Context TxInfo ScriptPurpose
 
 instance IsData Context where
-  toData (Context _ _) = undefined
+  -- toData will be implemented in the Plutus library,
+  -- this is just a FakePlutus hack.
+  toData (Context _ _) = I 0
   fromData _ctxdata = Nothing
diff --git a/alonzo/impl/src/Cardano/Ledger/Alonzo/PlutusScriptApi.hs b/alonzo/impl/src/Cardano/Ledger/Alonzo/PlutusScriptApi.hs
@@ -34,7 +34,7 @@ import Cardano.Ledger.Alonzo.Tx
     wits',
   )
 import qualified Cardano.Ledger.Alonzo.TxBody as Alonzo (TxBody (..), TxOut (..), vldt')
-import Cardano.Ledger.Alonzo.TxInfo (runPLCScript, transTx, valContext)
+import Cardano.Ledger.Alonzo.TxInfo (transTx, valContext)
 import Cardano.Ledger.Alonzo.TxWitness (TxWitness (txwitsVKey'), txscripts')
 import qualified Cardano.Ledger.Core as Core
 import Cardano.Ledger.Era (Crypto, Era, ValidateScript (..))
@@ -48,6 +48,7 @@ import Data.Sequence.Strict (StrictSeq)
 import Data.Set (Set)
 import qualified Data.Set as Set
 import GHC.Records (HasField (..))
+import qualified Language.PlutusTx as P (Data (..))
 import Shelley.Spec.Ledger.Address (Addr)
 import Shelley.Spec.Ledger.BaseTypes (StrictMaybe (..))
 import Shelley.Spec.Ledger.Credential (Credential (ScriptHashObj))
@@ -140,7 +141,13 @@ evalScripts tx ((AlonzoScript.TimelockScript timelock, _, _, _) : rest) =
   where
     vhks = Set.map witKeyHash (txwitsVKey' (wits' tx))
 evalScripts tx ((AlonzoScript.PlutusScript pscript, ds, units, cost) : rest) =
-  runPLCScript cost pscript units (map getPlutusData ds) && evalScripts tx rest
+  runPLCScript_TESTING_ONLY_WARNING cost pscript units (map getPlutusData ds) && evalScripts tx rest
+  where
+    -- TEMPORARY replacement for runPLCScript in order to write tests.
+    -- TODO WARNING replace this function with runPLCScript AS SOON AS
+    -- we can supply a proper cost model to plutus
+    runPLCScript_TESTING_ONLY_WARNING _ _ _ ((P.I x) : _) = x == 42
+    runPLCScript_TESTING_ONLY_WARNING _ _ _ _ = False
 
 -- ===================================================================
 -- From Specification, Figure 12 "UTXOW helper functions"

diff --git a/alonzo/impl/src/Cardano/Ledger/Alonzo/Rules/Utxo.hs b/alonzo/impl/src/Cardano/Ledger/Alonzo/Rules/Utxo.hs
@@ -94,7 +94,7 @@ import Shelley.Spec.Ledger.UTxO
 
 -- Size of the datum hash attached to the output (could be Nothing)
 datHashSize :: TxOut era -> Integer
-datHashSize out = error "need heapwords instance"
+datHashSize out = 0 --TODO "need heapwords instance"
   where
     _ = getField @"datahash" out
 

diff --git a/alonzo/impl/src/Cardano/Ledger/Alonzo/TxBody.hs b/alonzo/impl/src/Cardano/Ledger/Alonzo/TxBody.hs
@@ -134,11 +134,13 @@ deriving stock instance
   Eq (TxOut era)
 
 instance
-  ( Show (Core.Value era)
+  ( Era era,
+    Show (Core.Value era)
   ) =>
   Show (TxOut era)
   where
-  show = error "Not yet implemented"
+  show (TxOut addr vl dh) =
+    "TxOut (" <> show addr <> " " <> show vl <> " " <> show dh <> ")"
 
 deriving via InspectHeapNamed "TxOut" (TxOut era) instance NoThunks (TxOut era)