From 1ce6ef69b4dc0ed21e5679ba358780ad35d6c76e Mon Sep 17 00:00:00 2001
From: KtorZ <matthias.benkort@gmail.com>
Date: Fri, 22 Sep 2023 14:34:46 +0200
Subject: [PATCH] Remove patterns, unneeded noise in this context.

---
 cardano-node/src/Cardano/Node/LedgerEvent.hs | 115 +++----------------
 1 file changed, 15 insertions(+), 100 deletions(-)

diff --git a/cardano-node/src/Cardano/Node/LedgerEvent.hs b/cardano-node/src/Cardano/Node/LedgerEvent.hs
index dd761682580..570ffbd964b 100644
--- a/cardano-node/src/Cardano/Node/LedgerEvent.hs
+++ b/cardano-node/src/Cardano/Node/LedgerEvent.hs
@@ -264,17 +264,21 @@ toLedgerEventShelley
   -> Maybe (LedgerEvent (EraCrypto era))
 toLedgerEventShelley evt =
   case unwrapLedgerEvent evt of
-    LETotalRewards e m ->
-      Just $ LedgerTotalRewards e m
-    LERestraintRewards e m creds ->
-      Just $ LedgerRestrainedRewards e m creds
-    LEDeltaReward e m ->
-      Just $ LedgerDeltaRewards e m
-    LEIncrementalReward e m ->
-      Just $ LedgerIncrementalRewards e m
-    LEMirTransfer fromReserve fromTreasury deltaReserve deltaTreasury ->
-      Just $ LedgerMirDist fromReserve fromTreasury deltaReserve deltaTreasury
-    LERetiredPools refunded unclaimed epoch ->
+    ShelleyLedgerEventTICK (TickNewEpochEvent (Shelley.TotalRewardEvent epoch rewards)) ->
+      Just $ LedgerTotalRewards epoch rewards
+    ShelleyLedgerEventTICK (TickNewEpochEvent (Shelley.RestrainedRewards epoch rewards credentials)) ->
+      Just $ LedgerRestrainedRewards epoch rewards credentials
+    ShelleyLedgerEventTICK (TickNewEpochEvent (Shelley.DeltaRewardEvent (RupdEvent epoch rewards))) ->
+      Just $ LedgerDeltaRewards epoch rewards
+    ShelleyLedgerEventTICK (TickRupdEvent (RupdEvent epoch rewards)) ->
+      Just $ LedgerIncrementalRewards epoch rewards
+    ShelleyLedgerEventTICK (TickNewEpochEvent (Shelley.MirEvent transfer)) ->
+      case transfer of
+        MirTransfer (InstantaneousRewards fromReserve fromTreasury deltaReserve deltaTreasury) ->
+          Just $ LedgerMirDist fromReserve fromTreasury deltaReserve deltaTreasury
+        NoMirTransfer{} -> -- FIXME: create an event for this
+          Nothing
+    ShelleyLedgerEventTICK (TickNewEpochEvent (Shelley.EpochEvent (PoolReapEvent (RetiredPools refunded unclaimed epoch)))) ->
       Just $ LedgerPoolReaping epoch refunded unclaimed
     ShelleyLedgerEventBBODY {} ->
       Just LedgerBody
@@ -312,95 +316,6 @@ eventCodecVersion = \case
   OneEraLedgerEvent (  S(S(S(S(S(Z{}))))) ) -> eraProtVerLow @(BabbageEra crypto)
   OneEraLedgerEvent (S(S(S(S(S(S(Z{}))))))) -> eraProtVerLow @(ConwayEra crypto)
 
---------------------------------------------------------------------------------
--- Patterns for event access. Why aren't these in ledger-specs?
-
-pattern LERestraintRewards ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "NEWEPOCH" era) ~ ShelleyNewEpochEvent era
-  ) =>
-  EpochNo ->
-  Map (StakeCredential (EraCrypto era)) (Set (Reward (EraCrypto era))) ->
-  Set (StakeCredential (EraCrypto era)) ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LERestraintRewards e m creds <-
-  ShelleyLedgerEventTICK
-    (TickNewEpochEvent (Shelley.RestrainedRewards e m creds))
-
-pattern LETotalRewards ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "NEWEPOCH" era) ~ ShelleyNewEpochEvent era
-  ) =>
-  EpochNo ->
-  Map (StakeCredential (EraCrypto era)) (Set (Reward (EraCrypto era))) ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LETotalRewards e m <-
-  ShelleyLedgerEventTICK
-    (TickNewEpochEvent (Shelley.TotalRewardEvent e m))
-
-pattern LEDeltaReward ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "NEWEPOCH" era) ~ ShelleyNewEpochEvent era
-  , Event (Ledger.EraRule "RUPD" era) ~ RupdEvent (EraCrypto era)
-  ) =>
-  EpochNo ->
-  Map (StakeCredential (EraCrypto era)) (Set (Reward (EraCrypto era))) ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LEDeltaReward e m <-
-  ShelleyLedgerEventTICK
-    (TickNewEpochEvent (Shelley.DeltaRewardEvent (RupdEvent e m)))
-
-pattern LEIncrementalReward ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "RUPD" era) ~ RupdEvent (EraCrypto era)
-  ) =>
-  EpochNo ->
-  Map (StakeCredential (EraCrypto era)) (Set (Reward (EraCrypto era))) ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LEIncrementalReward e m <-
-  ShelleyLedgerEventTICK
-    (TickRupdEvent (RupdEvent e m))
-
-pattern LEMirTransfer ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "NEWEPOCH" era) ~ ShelleyNewEpochEvent era
-  , Event (Ledger.EraRule "MIR" era) ~ ShelleyMirEvent era
-  ) =>
-  Map (StakeCredential (EraCrypto era)) Coin ->
-  Map (StakeCredential (EraCrypto era)) Coin ->
-  DeltaCoin ->
-  DeltaCoin ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LEMirTransfer rp tp rtt ttr <-
-  ShelleyLedgerEventTICK
-    ( TickNewEpochEvent
-        ( Shelley.MirEvent
-            ( MirTransfer
-                (InstantaneousRewards rp tp rtt ttr)
-              )
-          )
-      )
-
-pattern LERetiredPools ::
-  ( Event (Ledger.EraRule "TICK" era) ~ ShelleyTickEvent era
-  , Event (Ledger.EraRule "NEWEPOCH" era) ~ ShelleyNewEpochEvent era
-  , Event (Ledger.EraRule "EPOCH" era) ~ ShelleyEpochEvent era
-  , Event (Ledger.EraRule "POOLREAP" era) ~ ShelleyPoolreapEvent era
-  ) =>
-  Map (StakeCredential (EraCrypto era)) (Map (KeyHash 'StakePool (EraCrypto era)) Coin) ->
-  Map (StakeCredential (EraCrypto era)) (Map (KeyHash 'StakePool (EraCrypto era)) Coin) ->
-  EpochNo ->
-  AuxLedgerEvent (LedgerState (ShelleyBlock proto era))
-pattern LERetiredPools r u e <-
-  ShelleyLedgerEventTICK
-    ( TickNewEpochEvent
-        ( Shelley.EpochEvent
-            ( PoolReapEvent
-                (RetiredPools r u e)
-              )
-          )
-      )
-
 data AnchoredEvent =
   AnchoredEvent
     { headerHash :: ShortByteString