Zebra Raw Tx deserialization (#44)

Implements features to deserialize the hex representation of of a Zebra Transaction

Reviewed-on: #44
Co-authored-by: Rene Vergara <rene@vergara.network>
Co-committed-by: Rene Vergara <rene@vergara.network>

librustzcash-wrapper/src/lib.rs

@@ -31,9 +31,17 @@ use zcash_primitives::{
         sapling::DiversifierKey
     },
     zip339::{Count, Mnemonic},
-    transaction::components::sapling::{
+    transaction::components::{
+        transparent::{
+            Bundle as TransparentBundle,
+            TxIn,
+            TxOut,
+            Authorized
+        },
+        sapling::{
             GrothProofBytes,
             OutputDescription
+        }
     },
     sapling::{
         PaymentAddress,
@@ -220,6 +228,81 @@ impl Hua {
     }
 }
 
+#[derive(BorshSerialize, BorshDeserialize)]
+pub struct Htx {
+    txid: Vec<u8>,
+    locktime: u32,
+    expiry: u32,
+    t_bundle: HTBundle
+}
+
+impl<RW> ToHaskell<RW> for Htx {
+    fn to_haskell<W: Write>(&self, writer: &mut W, _tag: PhantomData<RW>) -> Result<()> {
+        self.serialize(writer)?;
+        Ok(())
+    }
+}
+
+
+#[derive(BorshSerialize, BorshDeserialize)]
+pub struct HTBundle {
+    vin: Vec<HTxIn>,
+    vout: Vec<HTxOut>,
+    coinbase: bool
+}
+
+impl<RW> ToHaskell<RW> for HTBundle {
+    fn to_haskell<W: Write>(&self, writer: &mut W, _tag: PhantomData<RW>) -> Result<()> {
+        self.serialize(writer)?;
+        Ok(())
+    }
+}
+
+impl HTBundle {
+    pub fn from_bundle(b: &TransparentBundle<Authorized>) -> HTBundle {
+        HTBundle { vin: b.vin.iter().map(HTxIn::pack).collect() , vout: b.vout.iter().map(HTxOut::pack).collect(), coinbase: b.is_coinbase()}
+    }
+}
+
+#[derive(BorshSerialize, BorshDeserialize)]
+pub struct HTxIn {
+    outpoint: u32,
+    script: Vec<u8>,
+    sequence: u32
+}
+
+impl<RW> ToHaskell<RW> for HTxIn {
+    fn to_haskell<W: Write>(&self, writer: &mut W, _tag: PhantomData<RW>) -> Result<()> {
+        self.serialize(writer)?;
+        Ok(())
+    }
+}
+
+impl HTxIn {
+    pub fn pack(t: &TxIn<Authorized>) -> HTxIn {
+        return HTxIn { outpoint: t.prevout.n(), script: t.script_sig.0.clone(), sequence: t.sequence}
+    }
+}
+
+#[derive(BorshSerialize, BorshDeserialize)]
+pub struct HTxOut {
+    amt: i64,
+    script: Vec<u8>
+}
+
+impl<RW> ToHaskell<RW> for HTxOut {
+    fn to_haskell<W: Write>(&self, writer: &mut W, _tag: PhantomData<RW>) -> Result<()> {
+        self.serialize(writer)?;
+        Ok(())
+    }
+}
+
+impl HTxOut {
+    pub fn pack(t: &TxOut) -> HTxOut {
+        return HTxOut { amt: i64::from_le_bytes(t.value.to_i64_le_bytes()) , script: t.script_pubkey.0.clone() }
+    }
+}
+
 #[derive(BorshSerialize, BorshDeserialize)]
 pub struct Hufvk {
     net: u8,
@@ -555,6 +638,29 @@ pub extern "C" fn rust_wrapper_orchard_note_decrypt(
     }
 }
 
+
+#[no_mangle]
+pub extern "C" fn rust_wrapper_tx_read(
+    tx: *const u8,
+    tx_len: usize,
+    out: *mut u8,
+    out_len: &mut usize
+    ){
+    let tx_input: Vec<u8> = marshall_from_haskell_var(tx, tx_len, RW);
+    let mut tx_reader = Cursor::new(tx_input);
+    let parsed_tx = Transaction::read(&mut tx_reader, Nu5);
+    match parsed_tx {
+        Ok(t) => {
+            let h = Htx {txid: t.txid().as_ref().to_vec(), locktime: t.lock_time(), expiry: u32::from(t.expiry_height()), t_bundle: HTBundle::from_bundle(t.transparent_bundle().unwrap()) };
+            marshall_to_haskell_var(&h, out, out_len, RW);
+        },
+        Err(_e) => {
+            let h0 = Htx {txid: vec![0], locktime: 0, expiry: 0, t_bundle: HTBundle {vin: vec![HTxIn {outpoint: 0, script: vec![0], sequence: 0}], vout: vec![HTxOut {amt: 0, script: vec![0]}], coinbase: true} };
+            marshall_to_haskell_var(&h0, out, out_len, RW);
+        }
+    }
+}
+
 #[no_mangle]
 pub extern "C" fn rust_wrapper_tx_parse(
     tx: *const u8,

src/C/Zcash.chs

@@ -123,6 +123,13 @@ import ZcashHaskell.Types
   -> `()'
 #}
 
+{# fun unsafe rust_wrapper_tx_read as rustWrapperTxRead
+     { toBorshVar* `BS.ByteString'&
+     , getVarBuffer `Buffer RawZebraTx'&
+     }
+  -> `()'
+#}
+
 {# fun unsafe rust_wrapper_gen_seed_phrase as rustWrapperGenSeedPhrase
      { getVarBuffer `Buffer Phrase'& } -> `()'
 #}

src/ZcashHaskell/Types.hs

@@ -16,6 +16,7 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE GeneralisedNewtypeDeriving #-}
+{-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DerivingVia #-}
 {-# LANGUAGE UndecidableInstances #-}
@@ -40,6 +41,7 @@ import qualified GHC.Generics as GHC
 import qualified Generics.SOP as SOP
 import Haskoin.Address (Address)
 import Haskoin.Crypto.Keys.Extended (XPrvKey)
+import qualified Haskoin.Transaction.Common as H
 
 -- * General
 --
@@ -89,6 +91,19 @@ data ZcashNet
 
 type AccountId = Int
 
+-- | Function to get the Base58 prefix for encoding a 'TransparentAddress'
+getTransparentPrefix :: ZcashNet -> TransparentType -> (Word8, Word8)
+getTransparentPrefix n t =
+  case t of
+    P2SH ->
+      case n of
+        MainNet -> (0x1c, 0xbd)
+        _ -> (0x1c, 0xba)
+    P2PKH ->
+      case n of
+        MainNet -> (0x1c, 0xb8)
+        _ -> (0x1d, 0x25)
+
 -- ** Constants
 -- | Type for coin types on the different networks
 data CoinType
@@ -104,7 +119,23 @@ getValue c =
     TestNetCoin -> 1
     RegTestNetCoin -> 1
 
--- | Constants for Sapling Human-readable part
+-- | A Zcash transaction
+data Transaction = Transaction
+  { tx_id :: !HexString
+  , tx_height :: !Int
+  , tx_conf :: !Int
+  , tx_expiry :: !Int
+  , tx_transpBundle :: !(Maybe TransparentBundle)
+  } deriving (Prelude.Show, Eq, Read)
+
+-- | The transparent portion of a Zcash transaction
+data TransparentBundle = TransparentBundle
+  { tb_vin :: ![H.TxIn]
+  , tb_vout :: ![H.TxOut]
+  , tb_coinbase :: !Bool
+  } deriving (Eq, Prelude.Show, Read)
+
+-- *** Constants for Sapling Human-readable part
 sapExtSpendingKeyHrp = "secret-extended-key-main" :: String
 
 sapExtFullViewingKeyHrp = "zxviews" :: String
@@ -117,7 +148,7 @@ sapTestExtFullViewingKeyHrp = "zxviewtestsapling" :: String
 
 sapTestPaymentAddressHrp = "ztestsapling" :: String
 
--- | Constants for Unified Human-readable part
+-- *** Constants for Unified Human-readable part
 uniPaymentAddressHrp = "u" :: T.Text
 
 uniFullViewingKeyHrp = "uview" :: T.Text
@@ -130,19 +161,6 @@ uniTestFullViewingKeyHrp = "uviewtest" :: T.Text
 
 uniTestIncomingViewingKeyHrp = "uivktest" :: T.Text
 
--- | Function to get the Base58 prefix for encoding a 'TransparentAddress'
-getTransparentPrefix :: ZcashNet -> TransparentType -> (Word8, Word8)
-getTransparentPrefix n t =
-  case t of
-    P2SH ->
-      case n of
-        MainNet -> (0x1c, 0xbd)
-        _ -> (0x1c, 0xba)
-    P2PKH ->
-      case n of
-        MainNet -> (0x1c, 0xb8)
-        _ -> (0x1d, 0x25)
-
 -- * RPC
 -- | A type to model Zcash RPC calls
 data RpcCall = RpcCall
@@ -217,6 +235,41 @@ data RawTxResponse = RawTxResponse
   } deriving (Prelude.Show, Eq, Read)
 
 -- ** `zebrad`
+data ZebraTxResponse = ZebraTxResponse
+  { ztr_blockheight :: !Int
+  , ztr_conf :: !Int
+  , ztr_hex :: !HexString
+  } deriving (Prelude.Show, Eq, Read)
+
+instance FromJSON ZebraTxResponse where
+  parseJSON =
+    withObject "ZebraTxResponse" $ \obj -> do
+      hex <- obj .: "hex"
+      height <- obj .: "height"
+      c <- obj .: "confirmations"
+      pure $ ZebraTxResponse height c hex
+
+-- | Type to represent a raw deserialized Zebra transaction
+data RawZebraTx = RawZebraTx
+  { zt_id :: !HexString
+  , zt_locktime :: !Word32
+  , zt_expiry :: !Word32
+  , zt_tBundle :: !RawTBundle
+  } deriving stock (Eq, Prelude.Show, GHC.Generic)
+    deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+    deriving anyclass (Data.Structured.Show)
+    deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct RawZebraTx
+
+-- | Type for a raw deserialized Zebra transparent bundle
+data RawTBundle = RawTBundle
+  { ztb_vin :: ![RawTxIn]
+  , ztb_vout :: ![RawTxOut]
+  , ztb_coinbase :: !Bool
+  } deriving stock (Eq, Prelude.Show, GHC.Generic)
+    deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+    deriving anyclass (Data.Structured.Show)
+    deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct RawTBundle
+
 -- | Type for the response from the `zebrad` RPC method `getinfo`
 data ZebraGetInfo = ZebraGetInfo
   { zgi_build :: !T.Text
@@ -268,6 +321,24 @@ data TransparentAddress = TransparentAddress
   , ta_bytes :: !HexString
   } deriving (Eq, Prelude.Show, Read)
 
+-- | Wrapper types for transparent elements
+data RawTxIn = RawTxIn
+  { rti_outpoint :: !Word32
+  , rti_script :: !BS.ByteString
+  , rti_seq :: !Word32
+  } deriving stock (Eq, Prelude.Show, GHC.Generic)
+    deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+    deriving anyclass (Data.Structured.Show)
+    deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct RawTxIn
+
+data RawTxOut = RawTxOut
+  { rto_amt :: !Word64
+  , rto_script :: !BS.ByteString
+  } deriving stock (Eq, Prelude.Show, GHC.Generic)
+    deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+    deriving anyclass (Data.Structured.Show)
+    deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct RawTxOut
+
 -- * Sapling
 -- | A spending key for Sapling
 newtype SaplingSpendingKey =

src/ZcashHaskell/Utils.hs

@@ -22,11 +22,13 @@ import C.Zcash
   , rustWrapperBech32Encode
   , rustWrapperF4Jumble
   , rustWrapperF4UnJumble
+  , rustWrapperTxRead
   )
 import Control.Exception (SomeException(..), try)
 import Control.Monad.IO.Class
 import Data.Aeson
 import qualified Data.ByteString as BS
+import Data.HexString (HexString(..))
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
 import Foreign.Rust.Marshall.Variable
@@ -34,13 +36,7 @@ import Network.HTTP.Client (HttpException(..))
 import Network.HTTP.Simple
 import ZcashHaskell.Types
 
-import Foreign.C.Types
+-- * Utility functions
-import Foreign.Marshal.Array (allocaArray, peekArray)
-import Foreign.Ptr (Ptr)
-
-import Data.Word
-
--- | 
 -- | Decode the given bytestring using Bech32
 decodeBech32 :: BS.ByteString -> RawData
 decodeBech32 = withPureBorshVarBuffer . rustWrapperBech32Decode
@@ -57,6 +53,7 @@ f4Jumble = withPureBorshVarBuffer . rustWrapperF4Jumble
 f4UnJumble :: BS.ByteString -> BS.ByteString
 f4UnJumble = withPureBorshVarBuffer . rustWrapperF4UnJumble
 
+-- * Node interaction
 -- | Make a Zcash RPC call
 makeZcashCall ::
      (MonadIO m, FromJSON a)
@@ -102,3 +99,11 @@ makeZebraCall host port m params = do
           case result zebraResp of
             Nothing -> return $ Left "Empty response from Zebra"
             Just zR -> return $ Right zR
+
+readZebraTransaction :: HexString -> Maybe RawZebraTx
+readZebraTransaction hex =
+  if BS.length (hexBytes $ zt_id rawTx) < 1
+    then Nothing
+    else Just rawTx
+  where
+    rawTx = (withPureBorshVarBuffer . rustWrapperTxRead) $ hexBytes hex

test/Spec.hs

@@ -71,6 +71,7 @@ import ZcashHaskell.Types
   , UnifiedAddress(..)
   , UnifiedFullViewingKey(..)
   , ZcashNet(..)
+  , ZebraTxResponse(..)
   , decodeHexText
   , getValue
   )
@@ -765,6 +766,12 @@ main = do
         let bscAdr = SaplingReceiver $ BS.pack cAdr
         let ca = genSaplingInternalAddress (SaplingSpendingKey $ BS.pack sk)
         fromMaybe (SaplingReceiver "") ca `shouldBe` bscAdr
+    describe "Zebra response processing: " $ do
+      it "Raw transaction" $ do
+        let h =
+              hexString
+                "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"
+        readZebraTransaction h `shouldNotBe` Nothing
 
 -- | Properties
 prop_PhraseLength :: Property

zebrablock.json

@@ -0,0 +1,20 @@
+{
+  "result": {
+    "hash": "0041ee9cb0e256a73c92bb72d830143c402ea350152f56f19f74d23cf51418fb",
+    "confirmations": 3583,
+    "height": 2767099,
+    "tx": [
+      "d169ec3eda57dc750edfc1aa6b8ffb4ed2065780bfd5964de34b529503ec372f",
+      "987fcdb9bd37cbb5b205a8336de60d043f7028bebaa372828d81f3da296c7ef9"
+    ],
+    "trees": {
+      "sapling": {
+        "size": 129349
+      },
+      "orchard": {
+        "size": 39382
+      }
+    }
+  },
+  "id": 123
+}

zebratx.json

@@ -0,0 +1,8 @@
+{
+  "result": {
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