Correct parsing of OutPoint

This PR includes components for the deserialization of low-level part of transparent components.

Reviewed-on: #45
Co-authored-by: Rene Vergara <rene@vergara.network>
Co-committed-by: Rene Vergara <rene@vergara.network>

src/ZcashHaskell/Types.hs

@@ -31,9 +31,10 @@ import qualified Data.ByteArray as BA
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Char8 as C
 import qualified Data.ByteString.Lazy.UTF8 as US
+import qualified Data.ByteString.Short as BS (ShortByteString, toShort)
 import Data.HexString
 import Data.Int
-import Data.Maybe (fromMaybe)
+import Data.Maybe (fromJust, fromMaybe)
 import Data.Structured
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
@@ -41,6 +42,7 @@ import Data.Word
 import qualified GHC.Generics as GHC
 import qualified Generics.SOP as SOP
 import Haskoin.Address (Address)
+import qualified Haskoin.Crypto.Hash as H (Hash256(..))
 import Haskoin.Crypto.Keys.Extended (XPrvKey)
 import qualified Haskoin.Transaction.Common as H
 
@@ -151,7 +153,9 @@ fromRawTxIn :: RawTxIn -> H.TxIn
 fromRawTxIn t =
   H.TxIn
     (H.OutPoint
-       (read $ US.toString $ C.fromStrict $ rop_hash $ rti_outpoint t)
+       ((fromJust .
+         H.hexToTxHash . E.decodeUtf8Lenient . rop_hash . rti_outpoint)
+          t)
        (rop_n $ rti_outpoint t))
     (rti_script t)
     (rti_seq t)