Reduce script size

Inline mustNotChangeParameters and add two bang patterns to reduce
script size enough to fit in the 16384 bytes limit.

Re-generate plutus golden files.

Format the code.

hydra-cluster/config/devnet/genesis-shelley.json

@@ -22,7 +22,7 @@
         "keyDeposit": 0,
         "maxBlockBodySize": 65536,
         "maxBlockHeaderSize": 1100,
-        "maxTxSize": 16405,
+        "maxTxSize": 16384,
         "minFeeA": 44,
         "minFeeB": 155381,
         "minPoolCost": 0,

hydra-node/test/Hydra/Chain/Direct/StateSpec.hs

@@ -77,7 +77,6 @@ import PlutusLedgerApi.V2 qualified as Plutus
 import Test.Aeson.GenericSpecs (roundtripAndGoldenSpecs)
 import Test.QuickCheck (
   Property,
-  forAllShrink,
   Testable (property),
   checkCoverage,
   classify,
@@ -87,6 +86,7 @@ import Test.QuickCheck (
   forAll,
   forAllBlind,
   forAllShow,
+  forAllShrink,
   getPositive,
   label,
   sized,

hydra-node/test/Hydra/HeadLogicSpec.hs

@@ -183,7 +183,7 @@ spec =
               s0 = inOpenState threeParties
 
           s0 `shouldSatisfy` \case
-            (Open OpenState{coordinatedHeadState = CoordinatedHeadState{decommitTx}}) -> decommitTx == Nothing
+            (Open OpenState{coordinatedHeadState = CoordinatedHeadState{decommitTx}}) -> isNothing decommitTx
             _ -> False
 
           s1 <- runHeadLogic aliceEnv ledger s0 $ do
@@ -208,7 +208,7 @@ spec =
           let s0 = inOpenState threeParties
 
           s0 `shouldSatisfy` \case
-            (Open OpenState{coordinatedHeadState = CoordinatedHeadState{decommitTx}}) -> decommitTx == Nothing
+            (Open OpenState{coordinatedHeadState = CoordinatedHeadState{decommitTx}}) -> isNothing decommitTx
             _ -> False
 
           let reqDecEvent = NetworkInput defaultTTL alice ReqDec{transaction = decommitTx', decommitRequester = alice}

hydra-plutus/scripts/vCommit.plutus

@@ -1,5 +1,5 @@
 {
     "type": "PlutusScriptV2",
-    "description": "hydra-vCommit-0.14.0-878-g46ff6715e",
+    "description": "hydra-vCommit-0.15.0-463-g09800bd268",
     "cborHex": "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"
 }

hydra-plutus/scripts/vInitial.plutus

@@ -1,5 +1,5 @@
 {
     "type": "PlutusScriptV2",
-    "description": "hydra-vInitial-0.14.0-878-g46ff6715e",
+    "description": "hydra-vInitial-0.15.0-463-g09800bd268",
     "cborHex": "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"
 }

hydra-plutus/src/Hydra/Contract/Head.hs

@@ -145,7 +145,7 @@ checkCollectCom ::
   Bool
 checkCollectCom ctx@ScriptContext{scriptContextTxInfo = txInfo} (contestationPeriod, parties, headId) =
   mustCollectUtxoHash
-    && mustNotChangeParameters
+    && mustNotChangeParameters (parties', parties) (contestationPeriod', contestationPeriod) (headId', headId)
     && mustCollectAllValue
     -- XXX: Is this really needed? If yes, why not check on the output?
     && traceIfFalse $(errorCode STNotSpent) (hasST headId val)
@@ -157,12 +157,6 @@ checkCollectCom ctx@ScriptContext{scriptContextTxInfo = txInfo} (contestationPer
     traceIfFalse $(errorCode IncorrectUtxoHash) $
       utxoHash == hashPreSerializedCommits collectedCommits
 
-  mustNotChangeParameters =
-    traceIfFalse $(errorCode ChangedParameters) $
-      parties' == parties
-        && contestationPeriod' == contestationPeriod
-        && headId' == headId
-
   mustCollectAllValue =
     traceIfFalse $(errorCode NotAllValueCollected) $
       -- NOTE: Instead of checking the head output val' against all collected
@@ -221,7 +215,7 @@ checkCollectCom ctx@ScriptContext{scriptContextTxInfo = txInfo} (contestationPer
 -- if it is there return the committed utxo
 commitDatum :: TxOut -> [Commit]
 commitDatum input = do
-  let datum = getTxOutDatum input
+  let !datum = getTxOutDatum input
   case fromBuiltinData @Commit.DatumType $ getDatum datum of
     Just (_party, commits, _headId) ->
       commits
@@ -238,18 +232,12 @@ checkDecrement ::
   Integer ->
   Bool
 checkDecrement ctx@ScriptContext{scriptContextTxInfo = txInfo} prevParties prevSnapshotNumber prevCperiod prevHeadId signature numberOfDecommitOutputs =
-  mustNotChangeParameters
+  mustNotChangeParameters (prevParties, nextParties) (prevCperiod, nextCperiod) (prevHeadId, nextHeadId)
     && checkSnapshot
     && checkSnapshotSignature
     && mustBeSignedByParticipant ctx prevHeadId
     && mustDecreaseValue
  where
-  mustNotChangeParameters =
-    traceIfFalse $(errorCode ChangedParameters) $
-      prevHeadId == nextHeadId
-        && prevParties == nextParties
-        && prevCperiod == nextCperiod
-
   checkSnapshot =
     traceIfFalse $(errorCode SnapshotNumberMismatch) $
       nextSnapshotNumber > prevSnapshotNumber
@@ -319,7 +307,7 @@ checkClose ctx parties initialUtxoHash sig cperiod headPolicyId =
     && mustBeSignedByParticipant ctx headPolicyId
     && mustInitializeContesters
     && mustPreserveValue
-    && mustNotChangeParameters
+    && mustNotChangeParameters (parties', parties) (cperiod', cperiod) (headId', headPolicyId)
  where
   mustPreserveValue =
     traceIfFalse $(errorCode HeadValueIsNotPreserved) $
@@ -370,12 +358,6 @@ checkClose ctx parties initialUtxoHash sig cperiod headPolicyId =
     LowerBound (Finite t) _ -> t
     _InfiniteBound -> traceError $(errorCode InfiniteLowerBound)
 
-  mustNotChangeParameters =
-    traceIfFalse $(errorCode ChangedParameters) $
-      headId' == headPolicyId
-        && parties' == parties
-        && cperiod' == cperiod
-
   mustInitializeContesters =
     traceIfFalse $(errorCode ContestersNonEmpty) $
       null contesters'
@@ -428,7 +410,7 @@ checkContest ctx contestationDeadline contestationPeriod parties closedSnapshotN
     && mustBeWithinContestationPeriod
     && mustUpdateContesters
     && mustPushDeadline
-    && mustNotChangeParameters
+    && mustNotChangeParameters (parties', parties) (contestationPeriod', contestationPeriod) (headId', headId)
     && mustPreserveValue
  where
   mustPreserveValue =
@@ -453,12 +435,6 @@ checkContest ctx contestationDeadline contestationPeriod parties closedSnapshotN
           time <= contestationDeadline
       _ -> traceError $(errorCode ContestNoUpperBoundDefined)
 
-  mustNotChangeParameters =
-    traceIfFalse $(errorCode ChangedParameters) $
-      parties' == parties
-        && headId' == headId
-        && contestationPeriod' == contestationPeriod
-
   mustPushDeadline =
     if length contesters' == length parties'
       then
@@ -564,6 +540,18 @@ getHeadAddress :: ScriptContext -> Address
 getHeadAddress = txOutAddress . txInInfoResolved . getHeadInput
 {-# INLINEABLE getHeadAddress #-}
 
+mustNotChangeParameters ::
+  ([Party], [Party]) ->
+  (ContestationPeriod, ContestationPeriod) ->
+  (CurrencySymbol, CurrencySymbol) ->
+  Bool
+mustNotChangeParameters (parties', parties) (contestationPeriod', contestationPeriod) (headId', headId) =
+  traceIfFalse $(errorCode ChangedParameters) $
+    parties' == parties
+      && contestationPeriod' == contestationPeriod
+      && headId' == headId
+{-# INLINEABLE mustNotChangeParameters #-}
+
 -- XXX: We might not need to distinguish between the three cases here.
 mustBeSignedByParticipant ::
   ScriptContext ->
@@ -643,7 +631,7 @@ hashTxOuts =
 -- | Check if 'TxOut' contains the PT token.
 hasPT :: CurrencySymbol -> TxOut -> Bool
 hasPT headCurrencySymbol txOut =
-  let pts = findParticipationTokens headCurrencySymbol (txOutValue txOut)
+  let !pts = findParticipationTokens headCurrencySymbol (txOutValue txOut)
    in length pts == 1
 {-# INLINEABLE hasPT #-}