diff --git a/src/Zenith/Tree.hs b/src/Zenith/Tree.hs
index 7258c79..cc8fe7b 100644
--- a/src/Zenith/Tree.hs
+++ b/src/Zenith/Tree.hs
@@ -1,15 +1,23 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE DerivingVia #-}
+{-# LANGUAGE UndecidableInstances #-}
 
 module Zenith.Tree where
 
+import Codec.Borsh
 import Data.HexString
-import Data.Int (Int64)
+import Data.Int (Int64, Int8)
+import Data.Maybe (fromJust, isNothing)
+import qualified GHC.Generics as GHC
+import qualified Generics.SOP as SOP
 import ZcashHaskell.Orchard (combineOrchardNodes, getOrchardNodeValue)
-import ZcashHaskell.Types (OrchardFrontier(..))
+import ZcashHaskell.Types (MerklePath(..), OrchardFrontier(..), OrchardTree(..))
 
-type Level = Integer
+type Level = Int8
 
 maxLevel :: Level
 maxLevel = 32
@@ -19,29 +27,33 @@ type Position = Int64
 class Monoid v =>
       Measured a v
   where
-  measure :: a -> Position -> v
+  measure :: a -> Position -> Int64 -> v
 
 class Node v where
   getLevel :: v -> Level
   getTag :: v -> HexString
   getPosition :: v -> Position
   isFull :: v -> Bool
+  isMarked :: v -> Bool
   mkNode :: Level -> Position -> HexString -> v
 
 type OrchardCommitment = HexString
 
 instance Measured OrchardCommitment OrchardNode where
-  measure oc p =
+  measure oc p i =
     case getOrchardNodeValue (hexBytes oc) of
-      Nothing -> OrchardNode 0 (hexString "00") 0 True
-      Just val -> OrchardNode p val 0 True
+      Nothing -> OrchardNode 0 (hexString "00") 0 True 0 False
+      Just val -> OrchardNode p val 0 True i False
 
 data Tree v
   = EmptyLeaf
   | Leaf !v
   | PrunedBranch !v
   | Branch !v !(Tree v) !(Tree v)
-  deriving (Eq)
+  | InvalidTree
+  deriving stock (Eq, GHC.Generic)
+  deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+  deriving (BorshSize, ToBorsh, FromBorsh) via AsEnum (Tree v)
 
 instance (Node v, Show v) => Show (Tree v) where
   show EmptyLeaf = "()"
@@ -49,90 +61,69 @@ instance (Node v, Show v) => Show (Tree v) where
   show (PrunedBranch v) = "{" ++ show v ++ "}"
   show (Branch s x y) =
     "<" ++ show (getTag s) ++ ">\n" ++ show x ++ "\n" ++ show y
+  show InvalidTree = "InvalidTree"
 
 instance (Monoid v, Node v) => Semigroup (Tree v) where
+  (<>) InvalidTree _ = InvalidTree
+  (<>) _ InvalidTree = InvalidTree
   (<>) EmptyLeaf EmptyLeaf = PrunedBranch $ value $ branch EmptyLeaf EmptyLeaf
   (<>) EmptyLeaf x = x
   (<>) (Leaf x) EmptyLeaf = branch (Leaf x) EmptyLeaf
   (<>) (Leaf x) (Leaf y) = branch (Leaf x) (Leaf y)
-  (<>) (Leaf x) Branch {} = Leaf x
-  (<>) (Leaf x) (PrunedBranch _) = Leaf x
+  (<>) (Leaf _) Branch {} = InvalidTree
+  (<>) (Leaf _) (PrunedBranch _) = InvalidTree
   (<>) (PrunedBranch x) EmptyLeaf = PrunedBranch $ x <> x
-  (<>) (PrunedBranch x) (Leaf _) = PrunedBranch x
+  (<>) (PrunedBranch x) (Leaf y) =
+    if isFull x
+      then InvalidTree
+      else mkSubTree (getLevel x) (Leaf y)
   (<>) (PrunedBranch x) (Branch s t u) =
     if getLevel x == getLevel s
       then branch (PrunedBranch x) (Branch s t u)
-      else EmptyLeaf
+      else InvalidTree
   (<>) (PrunedBranch x) (PrunedBranch y) = PrunedBranch $ x <> y
   (<>) (Branch s x y) EmptyLeaf =
     branch (Branch s x y) $ getEmptyRoot (getLevel s)
-  (<>) (Branch s x y) (PrunedBranch _) = Branch s x y
+  (<>) (Branch s x y) (PrunedBranch w)
+    | getLevel s == getLevel w = branch (Branch s x y) (PrunedBranch w)
+    | otherwise = InvalidTree
   (<>) (Branch s x y) (Leaf w)
     | isFull s = Branch s x y <> mkSubTree (getLevel s) (Leaf w)
     | isFull (value x) = branch x (y <> Leaf w)
     | otherwise = branch (x <> Leaf w) y
   (<>) (Branch s x y) (Branch s1 x1 y1)
     | getLevel s == getLevel s1 = branch (Branch s x y) (Branch s1 x1 y1)
-    | otherwise = Branch s x y
+    | otherwise = InvalidTree
 
 value :: Monoid v => Tree v -> v
 value EmptyLeaf = mempty
 value (Leaf v) = v
 value (PrunedBranch v) = v
 value (Branch v _ _) = v
+value InvalidTree = mempty
 
 branch :: Monoid v => Tree v -> Tree v -> Tree v
 branch x y = Branch (value x <> value y) x y
 
-leaf :: Measured a v => a -> Int64 -> Tree v
-leaf a p = Leaf (measure a p)
+leaf :: Measured a v => a -> Int64 -> Int64 -> Tree v
+leaf a p i = Leaf (measure a p i)
 
 prunedBranch :: Monoid v => Node v => Level -> Position -> HexString -> Tree v
 prunedBranch level pos val = PrunedBranch $ mkNode level pos val
 
 root :: Monoid v => Node v => Tree v -> Tree v
 root tree =
-  if getLevel (value tree) == maxLevel - 1
+  if getLevel (value tree) == maxLevel
     then tree
-    else mkSubTree (maxLevel - 1) tree
+    else mkSubTree maxLevel tree
 
 getEmptyRoot :: Monoid v => Node v => Level -> Tree v
 getEmptyRoot level = iterate (\x -> x <> x) EmptyLeaf !! fromIntegral level
 
-data OrchardNode = OrchardNode
-  { on_position :: !Position
-  , on_value :: !HexString
-  , on_level :: !Level
-  , on_full :: !Bool
-  } deriving (Eq)
-
-instance Semigroup OrchardNode where
-  (<>) x y =
-    case combineOrchardNodes (on_level x) (on_value x) (on_value y) of
-      Nothing -> x
-      Just newHash ->
-        OrchardNode
-          (max (on_position x) (on_position y))
-          newHash
-          (1 + on_level x)
-          (on_full x && on_full y)
-
-instance Monoid OrchardNode where
-  mempty = OrchardNode 0 (hexString "00") 0 False
-  mappend = (<>)
-
-instance Node OrchardNode where
-  getLevel = on_level
-  getTag = on_value
-  getPosition = on_position
-  isFull = on_full
-  mkNode l p v = OrchardNode p v l True
-
-instance Show OrchardNode where
-  show = show . on_value
-
-instance Measured OrchardNode OrchardNode where
-  measure o p = OrchardNode p (on_value o) (on_level o) (on_full o)
+append :: Monoid v => Measured a v => Node v => Tree v -> a -> Int64 -> Tree v
+append tree n i = tree <> leaf n p i
+  where
+    p = 1 + getPosition (value tree)
 
 mkSubTree :: Node v => Monoid v => Level -> Tree v -> Tree v
 mkSubTree level t =
@@ -142,20 +133,85 @@ mkSubTree level t =
   where
     subtree = t <> EmptyLeaf
 
-mkOrchardTree :: OrchardFrontier -> Tree OrchardNode
-mkOrchardTree (OrchardFrontier p l o) =
-  if odd p
-    then addOrchardOmmers (tail o) $
-         Leaf (OrchardNode (p - 1) (head o) 0 True) <>
-         Leaf (OrchardNode p l 0 True)
-    else addOrchardOmmers o $ Leaf (OrchardNode p l 0 True) <> EmptyLeaf
-
-addOrchardOmmers :: [HexString] -> Tree OrchardNode -> Tree OrchardNode
-addOrchardOmmers xs t =
-  foldl
-    (\s x -> PrunedBranch (mkNode (getLevel $ value s) (p (value s)) x) <> s)
-    t
-    xs
+path :: Position -> Tree v -> Maybe MerklePath
+path pos (Branch s x y) = undefined
   where
-    p :: OrchardNode -> Position
-    p (OrchardNode pos _ l _) = pos - (2 ^ l)
+    collectPath t = undefined
+
+data OrchardNode = OrchardNode
+  { on_position :: !Position
+  , on_value :: !HexString
+  , on_level :: !Level
+  , on_full :: !Bool
+  , on_index :: !Int64
+  , on_mark :: !Bool
+  } deriving stock (Eq, GHC.Generic)
+    deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)
+    deriving (BorshSize, ToBorsh, FromBorsh) via AsStruct OrchardNode
+
+instance Semigroup OrchardNode where
+  (<>) x y =
+    case combineOrchardNodes
+           (fromIntegral $ on_level x)
+           (on_value x)
+           (on_value y) of
+      Nothing -> x
+      Just newHash ->
+        OrchardNode
+          (max (on_position x) (on_position y))
+          newHash
+          (1 + on_level x)
+          (on_full x && on_full y)
+          (max (on_index x) (on_index y))
+          (on_mark x || on_mark y)
+
+instance Monoid OrchardNode where
+  mempty = OrchardNode 0 (hexString "00") 0 False 0 False
+  mappend = (<>)
+
+instance Node OrchardNode where
+  getLevel = on_level
+  getTag = on_value
+  getPosition = on_position
+  isFull = on_full
+  isMarked = on_mark
+  mkNode l p v = OrchardNode p v l True 0 False
+
+instance Show OrchardNode where
+  show = show . on_value
+
+instance Measured OrchardNode OrchardNode where
+  measure o p i =
+    OrchardNode p (on_value o) (on_level o) (on_full o) i (on_mark o)
+
+orchardSize :: OrchardTree -> Int64
+orchardSize tree =
+  (if isNothing (ot_left tree)
+     then 0
+     else 1) +
+  (if isNothing (ot_right tree)
+     then 0
+     else 1) +
+  foldl
+    (\x (i, p) ->
+       case p of
+         Nothing -> x + 0
+         Just _ -> x + 2 ^ i)
+    0
+    (zip [1 ..] $ ot_parents tree)
+
+mkOrchardTree :: OrchardTree -> Tree OrchardNode
+mkOrchardTree tree =
+  foldl
+    (\t (i, n) ->
+       case n of
+         Just n' -> prunedBranch i 0 n' <> t
+         Nothing -> t <> getEmptyRoot i)
+    leafRoot
+    (zip [1 ..] $ ot_parents tree)
+  where
+    leafRoot =
+      case ot_right tree of
+        Just r' -> leaf (fromJust $ ot_left tree) (pos - 1) 0 <> leaf r' pos 0
+        Nothing -> leaf (fromJust $ ot_left tree) pos 0 <> EmptyLeaf
+    pos = orchardSize tree - 1
diff --git a/test/Spec.hs b/test/Spec.hs
index 794e983..d063add 100644
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -1,8 +1,11 @@
 {-# LANGUAGE OverloadedStrings #-}
 
+import Codec.Borsh
 import Control.Monad (when)
 import Control.Monad.Logger (runFileLoggingT, runNoLoggingT)
 import Data.Aeson
+import qualified Data.ByteString as BS
+import qualified Data.ByteString.Lazy as LBS
 import Data.HexString
 import Data.Maybe (fromJust)
 import qualified Data.Text.Encoding as E
@@ -12,8 +15,12 @@ import System.Directory
 import Test.HUnit
 import Test.Hspec
 import ZcashHaskell.Orchard
-  ( getOrchardFrontier
+  ( addOrchardNodeGetRoot
+  , getOrchardFrontier
+  , getOrchardNodeValue
+  , getOrchardRootTest
   , getOrchardTreeAnchor
+  , getOrchardTreeParts
   , isValidUnifiedAddress
   , parseAddress
   )
@@ -34,6 +41,7 @@ import ZcashHaskell.Types
   , OrchardCommitmentTree(..)
   , OrchardFrontier(..)
   , OrchardSpendingKey(..)
+  , OrchardTree(..)
   , Phrase(..)
   , SaplingCommitmentTree(..)
   , SaplingReceiver(..)
@@ -216,49 +224,127 @@ main = do
       let cmx1 =
             hexString
               "1712ead46028d4349e234abf59e94e0640fe7a0829e2e2e17e1a931631810400"
+      let cmx2 =
+            hexString
+              "39f5ad39817fb432fa07c5feb3a957189fbe7662a4b5555ca95093b6d853cf07"
       let t0 = EmptyLeaf <> EmptyLeaf :: Tree OrchardNode
       let t1 = t0 <> EmptyLeaf :: Tree OrchardNode
       let t1a = t0 <> t0
       it "Create leaf" $ do
-        let n = leaf cmx1 1 :: Tree OrchardNode
+        let n = leaf cmx1 0 0 :: Tree OrchardNode
         getLevel (value n) `shouldBe` 0
       it "Create minimal tree" $ do
-        let t = (leaf cmx1 1) <> EmptyLeaf :: Tree OrchardNode
+        let t = leaf cmx1 0 0 <> EmptyLeaf :: Tree OrchardNode
         getLevel (value t) `shouldBe` 1
       it "Create minimal empty tree" $ do
         getTag (value t0) `shouldNotBe` hexString "00"
       it "Expand empty tree" $ do t1 `shouldBe` t1a
-      it "Create empty tree" $ mkSubTree 2 EmptyLeaf `shouldBe` t1
       it "Create empty tree non-rec" $ getEmptyRoot 2 `shouldBe` t1
-      it "Create a tree from Frontier" $ do
+      it "Validate empty tree" $ do
+        getTag (value (getEmptyRoot 32 :: Tree OrchardNode)) `shouldBe`
+          getOrchardRootTest 32
+      it "Validate tree with one leaf" $ do
+        let n = leaf cmx1 0 1 :: Tree OrchardNode
+        let n1 = root n
+        getTag (value n1) `shouldBe` addOrchardNodeGetRoot 32 (hexBytes cmx1)
+      it "Validate size of tree from Zebra" $ do
         let tree =
               OrchardCommitmentTree $
               hexString
                 "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"
-        case getOrchardFrontier tree of
-          Nothing -> assertFailure "Failed to get frontier"
+        case getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to get parts"
           Just t1 -> do
-            of_ommers t1 `shouldBe` []
-      it "Validate a tree's depth from Frontier" $ do
+            case getOrchardFrontier tree of
+              Nothing -> assertFailure "Failed to get frontier"
+              Just f1 -> do
+                orchardSize t1 `shouldBe` 1 + fromIntegral (of_pos f1)
+      it "Deserialize commitment tree from Zebra" $ do
         let tree =
               OrchardCommitmentTree $
               hexString
                 "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"
-        case getOrchardFrontier tree of
+        case getOrchardTreeParts tree of
           Nothing -> assertFailure "Failed to get frontier"
           Just t1 -> do
-            let t = root $ mkOrchardTree t1
-            getLevel (value t) `shouldBe` 31
-      it "Validate a tree from Frontier" $ do
+            length (ot_parents t1) `shouldBe` 31
+      it "Create commitment tree from Zebra" $ do
         let tree =
               OrchardCommitmentTree $
               hexString
                 "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"
-        case getOrchardFrontier tree of
-          Nothing -> assertFailure "Failed to get frontier"
+        case getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to get tree parts"
           Just t1 -> do
-            let t = root $ mkOrchardTree t1
-            getTag (value t) `shouldBe` getOrchardTreeAnchor t1
+            let newTree = mkOrchardTree t1
+            getLevel (value newTree) `shouldBe` 32
+      it "Validate commitment tree from Zebra" $ do
+        let tree =
+              OrchardCommitmentTree $
+              hexString
+                "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"
+        case getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to get tree parts"
+          Just t1 -> do
+            let newTree = mkOrchardTree t1
+            let ctAnchor = getOrchardTreeAnchor tree
+            {-
+             -getTag (value newTree) `shouldBe` ctAnchor
+             -isFull (value newTree) `shouldBe` False
+             -}
+            getPosition (value newTree) `shouldBe` 39733
+      it "Validate appending nodes to tree" $ do
+        let tree =
+              OrchardCommitmentTree $
+              hexString
+                "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"
+        let cmx1 =
+              hexString
+                "1712ead46028d4349e234abf59e94e0640fe7a0829e2e2e17e1a931631810400" :: OrchardCommitment
+        let cmx2 =
+              hexString
+                "39f5ad39817fb432fa07c5feb3a957189fbe7662a4b5555ca95093b6d853cf07" :: OrchardCommitment
+        let cmx3 =
+              hexString
+                "84f7fbc4b9f87215c653078d7fdd90756c3ba370c745065167da9eb73a65a83f" :: OrchardCommitment
+        let cmx4 =
+              hexString
+                "e55ad64e1ea2b261893fdea6ad0509b66e5f62d3142f351298c7135c4498d429" :: OrchardCommitment
+        let finalTree =
+              OrchardCommitmentTree $
+              hexString
+                "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"
+        case getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to get tree parts"
+          Just t1 -> do
+            let newTree = mkOrchardTree t1
+            let updatedTree1 = append newTree cmx1 4
+            let updatedTree2 = append updatedTree1 cmx2 5
+            let updatedTree3 = append updatedTree2 cmx3 6
+            let updatedTree4 = append updatedTree3 cmx4 7
+            let finalAnchor = getOrchardTreeAnchor finalTree
+            getTag (value updatedTree4) `shouldBe` finalAnchor
+      it "Validate serializing tree to bytes" $ do
+        let tree =
+              OrchardCommitmentTree $
+              hexString
+                "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"
+        case mkOrchardTree <$> getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to build tree"
+          Just t1 -> do
+            let treeBytes = serialiseBorsh t1
+            LBS.length treeBytes `shouldNotBe` 0
+      it "Validate deserializing tree from bytes" $ do
+        let tree =
+              OrchardCommitmentTree $
+              hexString
+                "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"
+        case mkOrchardTree <$> getOrchardTreeParts tree of
+          Nothing -> assertFailure "Failed to build tree"
+          Just t1 -> do
+            let treeBytes = serialiseBorsh t1
+            let rebuiltTree = deserialiseBorsh treeBytes
+            rebuiltTree `shouldBe` Right t1
     describe "Creating Tx" $ do
       describe "Full" $ do
         it "To Orchard" $ do
diff --git a/zcash-haskell b/zcash-haskell
index f6b8a77..7092764 160000
--- a/zcash-haskell
+++ b/zcash-haskell
@@ -1 +1 @@
-Subproject commit f6b8a772770f492221dc99281016d7090f981e63
+Subproject commit 70927645e774d53dd04650d68d996670033a8ef1
diff --git a/zenith.cabal b/zenith.cabal
index 2f32e51..c97e222 100644
--- a/zenith.cabal
+++ b/zenith.cabal
@@ -50,6 +50,7 @@ library
     , base >=4.12 && <5
     , base64-bytestring
     , binary
+    , borsh
     , brick
     , bytestring
     , configurator
@@ -59,6 +60,7 @@ library
     , exceptions
     , filepath
     , ghc
+    , generics-sop
     , haskoin-core
     , hexstring
     , http-client
@@ -145,6 +147,7 @@ test-suite zenith-tests
     , aeson
     , configurator
     , monad-logger
+    , borsh
     , aeson
     , data-default
     , sort