Add JSON instances for ZcashNet

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.6.2.2]
+
+- Added JSON instances for `ZcashNet`
+
 ## [0.6.2.1]
 
 ### Changed

src/ZcashHaskell/Types.hs

@@ -90,7 +90,7 @@ data ZcashNet
   = MainNet
   | TestNet
   | RegTestNet
-  deriving (Eq, Prelude.Show, Read)
+  deriving (Eq, Prelude.Show, Read, GHC.Generic, ToJSON, FromJSON)
 
 type AccountId = Int