librustzcash-wrapper/src/lib.rs

@@ -145,16 +145,21 @@ impl HshieldedOutput {
     }
 }
 
+#[derive(BorshSerialize, BorshDeserialize)]
+pub struct Hhex {
+    bytes: Vec<u8>
+}
+
 #[derive(BorshSerialize, BorshDeserialize)]
 pub struct Haction {
-    nf: Vec<u8>,
+    nf: Hhex,
-    rk: Vec<u8>,
+    rk: Hhex,
-    cmx: Vec<u8>,
+    cmx: Hhex,
-    eph_key: Vec<u8>,
+    eph_key: Hhex,
-    enc_txt: Vec<u8>,
+    enc_txt: Hhex,
-    out_txt: Vec<u8>,
+    out_txt: Hhex,
-    cv: Vec<u8>,
+    cv: Hhex,
-    auth: Vec<u8>
+    auth: Hhex
 }
 
 impl<RW> FromHaskell<RW> for Haction {
@@ -498,12 +503,12 @@ pub extern "C" fn rust_wrapper_orchard_note_decrypt(
     let fvk_input: Vec<u8> = marshall_from_haskell_var(key, key_len, RW);
     let note_input: Haction = marshall_from_haskell_var(note, note_len, RW);
     let action: Action<Signature<SpendAuth>> = Action::from_parts(
-        Nullifier::from_bytes(&to_array(note_input.nf)).unwrap(), 
+        Nullifier::from_bytes(&to_array(note_input.nf.bytes)).unwrap(), 
-        VerificationKey::try_from(to_array(note_input.rk)).unwrap(), 
+        VerificationKey::try_from(to_array(note_input.rk.bytes)).unwrap(), 
-        ExtractedNoteCommitment::from_bytes(&to_array(note_input.cmx)).unwrap(), 
+        ExtractedNoteCommitment::from_bytes(&to_array(note_input.cmx.bytes)).unwrap(), 
-        TransmittedNoteCiphertext {epk_bytes: to_array(note_input.eph_key), enc_ciphertext: to_array(note_input.enc_txt), out_ciphertext: to_array(note_input.out_txt)}, 
+        TransmittedNoteCiphertext {epk_bytes: to_array(note_input.eph_key.bytes), enc_ciphertext: to_array(note_input.enc_txt.bytes), out_ciphertext: to_array(note_input.out_txt.bytes)}, 
-        ValueCommitment::from_bytes(&to_array(note_input.cv)).unwrap(), 
+        ValueCommitment::from_bytes(&to_array(note_input.cv.bytes)).unwrap(), 
-        Signature::from(to_array(note_input.auth)));
+        Signature::from(to_array(note_input.auth.bytes)));
     let fvk_array = to_array(fvk_input);
     let domain = OrchardDomain::for_nullifier(*action.nullifier());
     let dec_fvk = FullViewingKey::from_bytes(&fvk_array);

package.yaml

@@ -36,6 +36,7 @@ library:
   - base58-bytestring
   - cryptonite
   - memory
+  - hexstring
   pkg-config-dependencies:
   - rustzcash_wrapper-uninstalled
 
@@ -54,3 +55,4 @@ tests:
     - text
     - aeson
     - haskoin-core
+    - hexstring

src/ZcashHaskell/Sapling.hs

@@ -26,6 +26,7 @@ import C.Zcash
   )
 import Data.Aeson
 import qualified Data.ByteString as BS
+import Data.HexString (HexString(..), toBytes)
 import Foreign.Rust.Marshall.Variable (withPureBorshVarBuffer)
 import ZcashHaskell.Types
   ( DecodedNote(..)
@@ -40,8 +41,8 @@ import ZcashHaskell.Utils (decodeBech32)
 isValidShieldedAddress :: BS.ByteString -> Bool
 isValidShieldedAddress = rustWrapperIsShielded
 
-getShieldedOutputs :: BS.ByteString -> [BS.ByteString]
+getShieldedOutputs :: HexString -> [BS.ByteString]
-getShieldedOutputs t = withPureBorshVarBuffer $ rustWrapperTxParse t
+getShieldedOutputs t = withPureBorshVarBuffer $ rustWrapperTxParse $ toBytes t
 
 -- | Check if given bytestring is a valid Sapling viewing key
 isValidSaplingViewingKey :: BS.ByteString -> Bool
@@ -76,24 +77,7 @@ instance FromJSON RawTxResponse where
       c <- obj .: "confirmations"
       b <- obj .: "blocktime"
       case o of
-        Nothing ->
+        Nothing -> pure $ RawTxResponse i h (getShieldedOutputs h) [] ht c b
-          pure $
-          RawTxResponse
-            i
-            (decodeHexText h)
-            (getShieldedOutputs (decodeHexText h))
-            []
-            ht
-            c
-            b
         Just o' -> do
           a <- o' .: "actions"
-          pure $
+          pure $ RawTxResponse i h (getShieldedOutputs h) a ht c b
-            RawTxResponse
-              i
-              (decodeHexText h)
-              (getShieldedOutputs (decodeHexText h))
-              a
-              ht
-              c
-              b

src/ZcashHaskell/Types.hs

@@ -28,6 +28,7 @@ import Data.Aeson
 import qualified Data.ByteArray as BA
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Char8 as C
+import Data.HexString
 import Data.Int
 import Data.Structured
 import qualified Data.Text as T
@@ -44,7 +45,6 @@ type Seed = C.ByteString
 -- | A mnemonic phrase used to derive seeds
 type Phrase = BS.ByteString
 
---
 -- | Type to represent data after Bech32 decoding
 data RawData = RawData
   { hrp :: BS.ByteString -- ^ Human-readable part of the Bech32 encoding
@@ -116,8 +116,8 @@ instance FromJSON BlockResponse where
 
 -- | Type to represent response from the `zcashd` RPC `getrawtransaction`
 data RawTxResponse = RawTxResponse
-  { rt_id :: T.Text
+  { rt_id :: !HexString
-  , rt_hex :: BS.ByteString
+  , rt_hex :: !HexString
   , rt_shieldedOutputs :: [BS.ByteString]
   , rt_orchardActions :: [OrchardAction]
   , rt_blockheight :: Integer
@@ -148,12 +148,12 @@ data TransparentAddress = TransparentAddress
 -- * Sapling
 -- | Type to represent a Sapling Shielded Output as provided by the @getrawtransaction@ RPC method of @zcashd@.
 data ShieldedOutput = ShieldedOutput
-  { s_cv :: BS.ByteString -- ^ Value commitment to the input note
+  { s_cv :: HexString -- ^ Value commitment to the input note
-  , s_cmu :: BS.ByteString -- ^ The u-coordinate of the note commitment for the output note
+  , s_cmu :: HexString -- ^ The u-coordinate of the note commitment for the output note
-  , s_ephKey :: BS.ByteString -- ^ Ephemeral Jubjub public key
+  , s_ephKey :: HexString -- ^ Ephemeral Jubjub public key
-  , s_encCipherText :: BS.ByteString -- ^ The output note encrypted to the recipient
+  , s_encCipherText :: HexString -- ^ The output note encrypted to the recipient
-  , s_outCipherText :: BS.ByteString -- ^ A ciphertext enabling the sender to recover the output note
+  , s_outCipherText :: HexString -- ^ A ciphertext enabling the sender to recover the output note
-  , s_proof :: BS.ByteString -- ^ Zero-knowledge proof using the Sapling Output circuit
+  , s_proof :: HexString -- ^ Zero-knowledge proof using the Sapling Output circuit
   } deriving stock (Eq, Prelude.Show, GHC.Generic)
     deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
     deriving anyclass (Data.Structured.Show)
@@ -168,14 +168,7 @@ instance FromJSON ShieldedOutput where
       encText <- obj .: "encCiphertext"
       outText <- obj .: "outCiphertext"
       p <- obj .: "proof"
-      pure $
+      pure $ ShieldedOutput cv cmu ephKey encText outText p
-        ShieldedOutput
-          (decodeHexText cv)
-          (decodeHexText cmu)
-          (decodeHexText ephKey)
-          (decodeHexText encText)
-          (decodeHexText outText)
-          (decodeHexText p)
 
 -- * Orchard
 -- | Type to represent a Unified Address
@@ -211,14 +204,14 @@ data UnifiedFullViewingKey = UnifiedFullViewingKey
 
 -- | Type to represent an Orchard Action as provided by the @getrawtransaction@ RPC method of @zcashd@, and defined in the [Zcash Protocol](https://zips.z.cash/protocol/protocol.pdf)
 data OrchardAction = OrchardAction
-  { nf :: BS.ByteString -- ^ The nullifier of the input note
+  { nf :: HexString -- ^ The nullifier of the input note
-  , rk :: BS.ByteString -- ^ The randomized validating key for @auth@
+  , rk :: HexString -- ^ The randomized validating key for @auth@
-  , cmx :: BS.ByteString -- ^ The x-coordinate of the note commitment for the output note
+  , cmx :: HexString -- ^ The x-coordinate of the note commitment for the output note
-  , eph_key :: BS.ByteString -- ^ An encoding of an ephemeral Pallas public key
+  , eph_key :: HexString -- ^ An encoding of an ephemeral Pallas public key
-  , enc_ciphertext :: BS.ByteString -- ^ The output note encrypted to the recipient
+  , enc_ciphertext :: HexString -- ^ The output note encrypted to the recipient
-  , out_ciphertext :: BS.ByteString -- ^ A ciphertext enabling the sender to recover the output note
+  , out_ciphertext :: HexString -- ^ A ciphertext enabling the sender to recover the output note
-  , cv :: BS.ByteString -- ^ A value commitment to the net value of the input note minus the output note
+  , cv :: HexString -- ^ A value commitment to the net value of the input note minus the output note
-  , auth :: BS.ByteString -- ^ A signature authorizing the spend in this Action
+  , auth :: HexString -- ^ A signature authorizing the spend in this Action
   } deriving stock (Eq, Prelude.Show, GHC.Generic)
     deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
     deriving anyclass (Data.Structured.Show)
@@ -235,16 +228,7 @@ instance FromJSON OrchardAction where
       outText <- obj .: "outCiphertext"
       cval <- obj .: "cv"
       a <- obj .: "spendAuthSig"
-      pure $
+      pure $ OrchardAction n r c ephKey encText outText cval a
-        OrchardAction
-          (decodeHexText n)
-          (decodeHexText r)
-          (decodeHexText c)
-          (decodeHexText ephKey)
-          (decodeHexText encText)
-          (decodeHexText outText)
-          (decodeHexText cval)
-          (decodeHexText a)
 
 -- | Type to represent a decoded note
 data DecodedNote = DecodedNote

stack.yaml

@@ -40,6 +40,8 @@ extra-deps:
    commit: 787c2e813eb3a5d16c375d4b37dfefbd2adcdf05
  - git: https://github.com/well-typed/borsh.git
    commit: d2fcfa159e0a844b1ec5e8ed3e232d4b380fa831
+ - git: https://git.vergara.tech/Vergara_Tech/haskell-hexstring.git
+   commit: fe2df6f7d63272ac147911c1573550bed1d38a37
  - vector-0.13.0.0@sha256:fa5cac81a17a5af388716792e8b99c24b3b66770086756d0d8b23f8272a0244c,9112
  - aeson-2.1.2.1@sha256:f10f3c661bd5cf57aee46b94420e47736240b8e209ac15f4bfc1a4e4d55831fa,6344
  - generically-0.1.1

zcash-haskell.cabal

@@ -48,6 +48,7 @@ library
     , cryptonite
     , foreign-rust
     , generics-sop
+    , hexstring
     , http-conduit
     , memory
     , text
@@ -66,6 +67,7 @@ test-suite zcash-haskell-test
     , base >=4.7 && <5
     , bytestring
     , haskoin-core
+    , hexstring
     , hspec
     , text
     , zcash-haskell