Use TemplateHaskell for JSON instances

src/Zenith/Types.hs

@@ -10,9 +10,11 @@
 module Zenith.Types where
 
 import Data.Aeson
+import Data.Aeson.TH (deriveJSON)
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Base64 as B64
 import qualified Data.ByteString.Char8 as C
+import Data.Char (toLower)
 import Data.HexString
 import Data.Maybe (fromMaybe)
 import qualified Data.Text as T
@@ -110,25 +112,7 @@ data ZcashWalletAPI = ZcashWalletAPI
   , zw_lastSync :: !Int
   } deriving (Eq, Prelude.Show)
 
-instance ToJSON ZcashWalletAPI where
-  toJSON (ZcashWalletAPI i n net b l) =
-    object
-      [ "index" .= i
-      , "name" .= n
-      , "network" .= net
-      , "birthday" .= b
-      , "lastSync" .= l
-      ]
-
-instance FromJSON ZcashWalletAPI where
-  parseJSON =
-    withObject "ZcashWalletAPI" $ \obj -> do
-      i <- obj .: "index"
-      n <- obj .: "name"
-      net <- obj .: "network"
-      b <- obj .: "birthday"
-      l <- obj .: "lastSync"
-      pure $ ZcashWalletAPI i n net b l
+$(deriveJSON defaultOptions {fieldLabelModifier = drop 3} ''ZcashWalletAPI)
 
 data ZcashAccountAPI = ZcashAccountAPI
   { za_index :: !Int
@@ -136,17 +120,18 @@ data ZcashAccountAPI = ZcashAccountAPI
   , za_name :: !T.Text
   } deriving (Eq, Prelude.Show)
 
-instance ToJSON ZcashAccountAPI where
-  toJSON (ZcashAccountAPI i w n) =
-    object ["index" .= i, "wallet" .= w, "name" .= n]
+$(deriveJSON defaultOptions {fieldLabelModifier = drop 3} ''ZcashAccountAPI)
 
-instance FromJSON ZcashAccountAPI where
-  parseJSON =
-    withObject "ZcashAccountAPI" $ \obj -> do
-      i <- obj .: "index"
-      w <- obj .: "wallet"
-      n <- obj .: "name"
-      pure $ ZcashAccountAPI i w n
+data ZcashAddressAPI = ZcashAddressAPI
+  { zd_index :: !Int
+  , zd_account :: !Int
+  , zd_name :: !T.Text
+  , zd_ua :: !T.Text
+  , zd_legacy :: !(Maybe T.Text)
+  , zd_transparent :: !(Maybe T.Text)
+  } deriving (Eq, Prelude.Show)
+
+$(deriveJSON defaultOptions {fieldLabelModifier = drop 3} ''ZcashAddressAPI)
 
 -- ** `zebrad`
 -- | Type for modeling the tree state response