diff --git a/CHANGELOG.md b/CHANGELOG.md
index f339b8c..9646ccd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Rearranged modules for cleaner dependencies.
 - Upgrade to Haskell LTS 21.6
 
 ## [0.1.0] - 2023-06-14 
diff --git a/src/ZcashHaskell/Types.hs b/src/ZcashHaskell/Types.hs
index 03d7d13..f03eaab 100644
--- a/src/ZcashHaskell/Types.hs
+++ b/src/ZcashHaskell/Types.hs
@@ -97,12 +97,12 @@ instance FromJSON ShieldedOutput where
       p <- obj .: "proof"
       pure $
         ShieldedOutput
-          (C.pack cv)
-          (C.pack cmu)
-          (C.pack ephKey)
-          (C.pack encText)
-          (C.pack outText)
-          (C.pack p)
+          (decodeHexText cv)
+          (decodeHexText cmu)
+          (decodeHexText ephKey)
+          (decodeHexText encText)
+          (decodeHexText outText)
+          (decodeHexText p)
 
 -- * Orchard
 -- | Type to represent a Unified Full Viewing Key
@@ -144,14 +144,14 @@ instance FromJSON OrchardAction where
       a <- obj .: "spendAuthSig"
       pure $
         OrchardAction
-          (C.pack n)
-          (C.pack r)
-          (C.pack c)
-          (C.pack ephKey)
-          (C.pack encText)
-          (C.pack outText)
-          (C.pack cval)
-          (C.pack a)
+          (decodeHexText n)
+          (decodeHexText r)
+          (decodeHexText c)
+          (decodeHexText ephKey)
+          (decodeHexText encText)
+          (decodeHexText outText)
+          (decodeHexText cval)
+          (decodeHexText a)
 
 -- | Type to represent a decoded Orchard Action
 data OrchardDecodedAction = OrchardDecodedAction
@@ -162,3 +162,15 @@ data OrchardDecodedAction = OrchardDecodedAction
     deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
     deriving anyclass (Data.Structured.Show)
     deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct OrchardDecodedAction
+
+-- * Helpers
+-- | Helper function to turn a hex-encoded string to bytestring
+decodeHexText :: String -> BS.ByteString
+decodeHexText h = BS.pack $ hexRead h
+  where
+    hexRead hexText
+      | null chunk = []
+      | otherwise =
+        fromIntegral (read ("0x" <> chunk)) : hexRead (drop 2 hexText)
+      where
+        chunk = take 2 hexText
diff --git a/src/ZcashHaskell/Utils.hs b/src/ZcashHaskell/Utils.hs
index c56a368..5f9362b 100644
--- a/src/ZcashHaskell/Utils.hs
+++ b/src/ZcashHaskell/Utils.hs
@@ -16,22 +16,10 @@ import C.Zcash
   , rustWrapperF4Jumble
   , rustWrapperF4UnJumble
   )
-
 import qualified Data.ByteString as BS
 import Foreign.Rust.Marshall.Variable
 import ZcashHaskell.Types
 
--- | Helper function to turn a hex-encoded string to bytestring
-decodeHexText :: String -> BS.ByteString
-decodeHexText h = BS.pack $ hexRead h
-  where
-    hexRead hexText
-      | null chunk = []
-      | otherwise =
-        fromIntegral (read ("0x" <> chunk)) : hexRead (drop 2 hexText)
-      where
-        chunk = take 2 hexText
-
 -- | Decode the given bytestring using Bech32
 decodeBech32 :: BS.ByteString -> RawData
 decodeBech32 = withPureBorshVarBuffer . rustWrapperBech32Decode
diff --git a/test/Spec.hs b/test/Spec.hs
index 36def01..a9999b9 100644
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -23,6 +23,7 @@ import ZcashHaskell.Types
   , RawTxResponse(..)
   , ShieldedOutput(s_cmu)
   , UnifiedFullViewingKey(..)
+  , decodeHexText
   )
 import ZcashHaskell.Utils
 
@@ -309,6 +310,10 @@ main = do
         let fakeUvk =
               "uview1u83changinga987bundchofch4ract3r5x8hqsw6vzw63n24atxpcatws82z092kryazuu6d7rayyut8m36wm4wpjy2z8r9hj48fx5pf49gw4sjrq8503qpz3vqj5hg0vg9vsqeasg5qjuyh94uyfm7v76udqcm2m0wfc25hcyqswcn56xxduq3xkgxkr0l73cjy88fdvf90eq5fda9g6x7yv7d0uckpevxg6540wc76xrc4axxvlt03ptaa2a0rektglmdy68656f3uzcdgqqyu0t7wk5cvwghyyvgqc0rp3vgu5ye4nd236ml57rjh083a2755qemf6dk6pw0qrnfm7246s8eg2hhzkzpf9h73chhng7xhmyem2sjh8rs2m9nhfcslsgenm"
         decodeUfvk fakeUvk `shouldBe` Nothing
+    describe "Decode Sapling tx" $ do
+      let svk =
+            "zxviews1qvapd723qqqqpqq09ldgykvyusthmkky2w062esx5xg3nz4m29qxcvndyx6grrhrdepu4ns88sjr3u6mfp2hhwj5hfd6y24r0f64uwq65vjrmsh9mr568kenk33fcumag6djcjywkm5v295egjuk3qdd47atprs0j33nhaaqep3uqspzp5kg4mthugvug0sc3gc83atkrgmguw9g7gkvh82tugrntf66lnvyeh6ufh4j2xt0xr2r4zujtm3qvrmd3vvnulycuwqtetg2jk384"
+      it "succeeds with correct key" pending
     describe "Decode Orchard tx" $ do
       let uvk =
             "uview1u833rp8yykd7h4druwht6xp6k8krle45fx8hqsw6vzw63n24atxpcatws82z092kryazuu6d7rayyut8m36wm4wpjy2z8r9hj48fx5pf49gw4sjrq8503qpz3vqj5hg0vg9vsqeasg5qjuyh94uyfm7v76udqcm2m0wfc25hcyqswcn56xxduq3xkgxkr0l73cjy88fdvf90eq5fda9g6x7yv7d0uckpevxg6540wc76xrc4axxvlt03ptaa2a0rektglmdy68656f3uzcdgqqyu0t7wk5cvwghyyvgqc0rp3vgu5ye4nd236ml57rjh083a2755qemf6dk6pw0qrnfm7246s8eg2hhzkzpf9h73chhng7xhmyem2sjh8rs2m9nhfcslsgenm"