From 43aa71eeb592b51fcbb0e17f1a3e8af9089c799d Mon Sep 17 00:00:00 2001
From: Jonathan Knowles <jonathan.knowles@iohk.io>
Date: Tue, 23 Nov 2021 05:56:12 +0000
Subject: [PATCH] Replace compatibility function `coinToNatural`.

---
 .../src/Cardano/Wallet/Primitive/Types/Coin.hs   | 16 +++++++++-------
 .../Cardano/Wallet/Primitive/Types/CoinSpec.hs   | 12 ++++++------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/lib/core/src/Cardano/Wallet/Primitive/Types/Coin.hs b/lib/core/src/Cardano/Wallet/Primitive/Types/Coin.hs
index 545607af8aa..67598577011 100644
--- a/lib/core/src/Cardano/Wallet/Primitive/Types/Coin.hs
+++ b/lib/core/src/Cardano/Wallet/Primitive/Types/Coin.hs
@@ -19,6 +19,7 @@ module Cardano.Wallet.Primitive.Types.Coin
     , fromIntegral
     , fromWord64
     , toInteger
+    , toNatural
     , toQuantity
     , toWord64
 
@@ -28,7 +29,6 @@ module Cardano.Wallet.Primitive.Types.Coin
     , unsafeToWord64
 
       -- * Compatibility
-    , coinToNatural
     , unsafeNaturalToCoin
 
       -- * Checks
@@ -149,6 +149,11 @@ fromWord64 = Coin . intCast
 toInteger :: Coin -> Integer
 toInteger = intCast . unCoin
 
+-- | Converts a 'Coin' to a 'Natural' value.
+--
+toNatural :: Coin -> Natural
+toNatural = unCoin
+
 -- | Converts a 'Coin' to a 'Quantity'.
 --
 -- Returns 'Nothing' if the given value does not fit within the bounds of
@@ -229,9 +234,6 @@ unsafeToWord64 c = fromMaybe onError (toWord64 c)
                                Compatibility
 -------------------------------------------------------------------------------}
 
-coinToNatural :: Coin -> Natural
-coinToNatural = unCoin
-
 unsafeNaturalToCoin :: Natural -> Coin
 unsafeNaturalToCoin = Coin
 
@@ -302,7 +304,7 @@ equipartition
 equipartition c =
     -- Note: the natural-to-coin conversion is safe, as partitioning guarantees
     -- to produce values that are less than or equal to the original value.
-    fmap unsafeNaturalToCoin . equipartitionNatural (coinToNatural c)
+    fmap unsafeNaturalToCoin . equipartitionNatural (toNatural c)
 
 -- | Partitions a coin into a number of parts, where the size of each part is
 --   proportional to the size of its corresponding element in the given list
@@ -321,8 +323,8 @@ partition c
     -- Note: the natural-to-coin conversion is safe, as partitioning guarantees
     -- to produce values that are less than or equal to the original value.
     = fmap (fmap unsafeNaturalToCoin)
-    . partitionNatural (coinToNatural c)
-    . fmap coinToNatural
+    . partitionNatural (toNatural c)
+    . fmap toNatural
 
 -- | Partitions a coin into a number of parts, where the size of each part is
 --   proportional to the size of its corresponding element in the given list
diff --git a/lib/core/test/unit/Cardano/Wallet/Primitive/Types/CoinSpec.hs b/lib/core/test/unit/Cardano/Wallet/Primitive/Types/CoinSpec.hs
index b294af859f9..a7cb8541f5b 100644
--- a/lib/core/test/unit/Cardano/Wallet/Primitive/Types/CoinSpec.hs
+++ b/lib/core/test/unit/Cardano/Wallet/Primitive/Types/CoinSpec.hs
@@ -78,8 +78,8 @@ prop_add_toNatural :: Coin -> Coin -> Property
 prop_add_toNatural a b =
     checkCoverageCoin a b $
     (===)
-        (Coin.coinToNatural (a `Coin.addCoin` b))
-        (Coin.coinToNatural a + Coin.coinToNatural b)
+        (Coin.toNatural (a `Coin.addCoin` b))
+        (Coin.toNatural a + Coin.toNatural b)
 
 prop_difference_distance :: Coin -> Coin -> Property
 prop_difference_distance a b =
@@ -105,13 +105,13 @@ prop_subtract_toNatural a b =
     checkCoverageCoin a b $
     if (a >= b)
     then
-        (Coin.coinToNatural <$> (a `Coin.subtractCoin` b))
+        (Coin.toNatural <$> (a `Coin.subtractCoin` b))
         ===
-        (Just (Coin.coinToNatural a - Coin.coinToNatural b))
+        (Just (Coin.toNatural a - Coin.toNatural b))
     else
-        (Coin.coinToNatural <$> (b `Coin.subtractCoin` a))
+        (Coin.toNatural <$> (b `Coin.subtractCoin` a))
         ===
-        (Just (Coin.coinToNatural b - Coin.coinToNatural a))
+        (Just (Coin.toNatural b - Coin.toNatural a))
 
 --------------------------------------------------------------------------------
 -- Coins that can be zero