feat: implement merkle path calculator
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2 changed files with 77 additions and 22 deletions
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@ -10,7 +10,7 @@ module Zenith.Tree where
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import Codec.Borsh
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import Data.HexString
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import Data.Int (Int64, Int8)
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import Data.Int (Int32, Int64, Int8)
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import Data.Maybe (fromJust, isNothing)
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import qualified GHC.Generics as GHC
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import qualified Generics.SOP as SOP
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@ -22,7 +22,7 @@ type Level = Int8
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maxLevel :: Level
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maxLevel = 32
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type Position = Int64
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type Position = Int32
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class Monoid v =>
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Measured a v
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@ -31,7 +31,7 @@ class Monoid v =>
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class Node v where
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getLevel :: v -> Level
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getTag :: v -> HexString
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getHash :: v -> HexString
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getPosition :: v -> Position
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isFull :: v -> Bool
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isMarked :: v -> Bool
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@ -60,7 +60,7 @@ instance (Node v, Show v) => Show (Tree v) where
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show (Leaf v) = "(" ++ show v ++ ")"
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show (PrunedBranch v) = "{" ++ show v ++ "}"
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show (Branch s x y) =
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"<" ++ show (getTag s) ++ ">\n" ++ show x ++ "\n" ++ show y
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"<" ++ show (getHash s) ++ ">\n" ++ show x ++ "\n" ++ show y
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show InvalidTree = "InvalidTree"
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instance (Monoid v, Node v) => Semigroup (Tree v) where
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@ -105,7 +105,7 @@ value InvalidTree = mempty
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branch :: Monoid v => Tree v -> Tree v -> Tree v
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branch x y = Branch (value x <> value y) x y
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leaf :: Measured a v => a -> Int64 -> Int64 -> Tree v
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leaf :: Measured a v => a -> Int32 -> Int64 -> Tree v
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leaf a p i = Leaf (measure a p i)
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prunedBranch :: Monoid v => Node v => Level -> Position -> HexString -> Tree v
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@ -120,8 +120,8 @@ root tree =
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getEmptyRoot :: Monoid v => Node v => Level -> Tree v
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getEmptyRoot level = iterate (\x -> x <> x) EmptyLeaf !! fromIntegral level
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append :: Monoid v => Measured a v => Node v => Tree v -> a -> Int64 -> Tree v
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append tree n i = tree <> leaf n p i
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append :: Monoid v => Measured a v => Node v => Tree v -> (a, Int64) -> Tree v
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append tree (n, i) = tree <> leaf n p i
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where
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p = 1 + getPosition (value tree)
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@ -133,10 +133,23 @@ mkSubTree level t =
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where
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subtree = t <> EmptyLeaf
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path :: Position -> Tree v -> Maybe MerklePath
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path pos (Branch s x y) = undefined
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path :: Monoid v => Node v => Position -> Tree v -> Maybe MerklePath
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path pos (Branch s x y) =
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if length (collectPath (Branch s x y)) /= 32
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then Nothing
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else Just $ MerklePath pos $ collectPath (Branch s x y)
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where
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collectPath t = undefined
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collectPath :: Monoid v => Node v => Tree v -> [HexString]
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collectPath EmptyLeaf = []
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collectPath Leaf {} = []
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collectPath PrunedBranch {} = []
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collectPath InvalidTree = []
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collectPath (Branch _ j k)
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| getPosition (value k) /= 0 && getPosition (value k) < pos = []
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| getPosition (value j) < pos = collectPath k <> [getHash (value j)]
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| getPosition (value j) >= pos = collectPath j <> [getHash (value k)]
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| otherwise = []
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path _ _ = Nothing
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data OrchardNode = OrchardNode
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{ on_position :: !Position
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@ -171,7 +184,7 @@ instance Monoid OrchardNode where
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instance Node OrchardNode where
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getLevel = on_level
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getTag = on_value
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getHash = on_value
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getPosition = on_position
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isFull = on_full
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isMarked = on_mark
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@ -214,4 +227,4 @@ mkOrchardTree tree =
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case ot_right tree of
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Just r' -> leaf (fromJust $ ot_left tree) (pos - 1) 0 <> leaf r' pos 0
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Nothing -> leaf (fromJust $ ot_left tree) pos 0 <> EmptyLeaf
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pos = orchardSize tree - 1
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pos = fromIntegral $ orchardSize tree - 1
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62
test/Spec.hs
62
test/Spec.hs
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@ -12,12 +12,13 @@ import qualified Data.Text.Encoding as E
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import Database.Persist
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import Database.Persist.Sqlite
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import System.Directory
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import Test.HUnit
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import Test.HUnit hiding (State(..))
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import Test.Hspec
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import ZcashHaskell.Orchard
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( addOrchardNodeGetRoot
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, getOrchardFrontier
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, getOrchardNodeValue
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, getOrchardPathAnchor
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, getOrchardRootTest
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, getOrchardTreeAnchor
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, getOrchardTreeParts
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@ -38,6 +39,7 @@ import ZcashHaskell.Transparent
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)
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import ZcashHaskell.Types
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( DecodedNote(..)
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, MerklePath(..)
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, OrchardCommitmentTree(..)
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, OrchardFrontier(..)
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, OrchardSpendingKey(..)
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@ -237,16 +239,16 @@ main = do
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let t = leaf cmx1 0 0 <> EmptyLeaf :: Tree OrchardNode
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getLevel (value t) `shouldBe` 1
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it "Create minimal empty tree" $ do
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getTag (value t0) `shouldNotBe` hexString "00"
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getHash (value t0) `shouldNotBe` hexString "00"
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it "Expand empty tree" $ do t1 `shouldBe` t1a
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it "Create empty tree non-rec" $ getEmptyRoot 2 `shouldBe` t1
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it "Validate empty tree" $ do
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getTag (value (getEmptyRoot 32 :: Tree OrchardNode)) `shouldBe`
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getHash (value (getEmptyRoot 32 :: Tree OrchardNode)) `shouldBe`
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getOrchardRootTest 32
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it "Validate tree with one leaf" $ do
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let n = leaf cmx1 0 1 :: Tree OrchardNode
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let n1 = root n
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getTag (value n1) `shouldBe` addOrchardNodeGetRoot 32 (hexBytes cmx1)
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getHash (value n1) `shouldBe` addOrchardNodeGetRoot 32 (hexBytes cmx1)
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it "Validate size of tree from Zebra" $ do
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let tree =
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OrchardCommitmentTree $
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@ -289,7 +291,7 @@ main = do
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let newTree = mkOrchardTree t1
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let ctAnchor = getOrchardTreeAnchor tree
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{-
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-getTag (value newTree) `shouldBe` ctAnchor
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-getHash (value newTree) `shouldBe` ctAnchor
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-isFull (value newTree) `shouldBe` False
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-}
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getPosition (value newTree) `shouldBe` 39733
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@ -318,12 +320,12 @@ main = do
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Nothing -> assertFailure "Failed to get tree parts"
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Just t1 -> do
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let newTree = mkOrchardTree t1
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let updatedTree1 = append newTree cmx1 4
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let updatedTree2 = append updatedTree1 cmx2 5
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let updatedTree3 = append updatedTree2 cmx3 6
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let updatedTree4 = append updatedTree3 cmx4 7
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let updatedTree1 = append newTree (cmx1, 4)
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let updatedTree2 = append updatedTree1 (cmx2, 5)
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let updatedTree3 = append updatedTree2 (cmx3, 6)
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let updatedTree4 = append updatedTree3 (cmx4, 7)
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let finalAnchor = getOrchardTreeAnchor finalTree
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getTag (value updatedTree4) `shouldBe` finalAnchor
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getHash (value updatedTree4) `shouldBe` finalAnchor
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it "Validate serializing tree to bytes" $ do
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let tree =
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OrchardCommitmentTree $
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@ -345,6 +347,46 @@ main = do
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let treeBytes = serialiseBorsh t1
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let rebuiltTree = deserialiseBorsh treeBytes
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rebuiltTree `shouldBe` Right t1
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it "Create merkle path" $ do
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let tree =
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OrchardCommitmentTree $
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hexString
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"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"
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let cmx1 =
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hexString
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"1712ead46028d4349e234abf59e94e0640fe7a0829e2e2e17e1a931631810400" :: OrchardCommitment
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let cmx2 =
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hexString
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"39f5ad39817fb432fa07c5feb3a957189fbe7662a4b5555ca95093b6d853cf07" :: OrchardCommitment
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case getOrchardTreeParts tree of
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Nothing -> assertFailure "Failed to get tree parts"
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Just t1 -> do
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let newTree = mkOrchardTree t1
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let updatedTree = foldl append newTree [(cmx1, 4), (cmx2, 5)]
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case path 39735 updatedTree of
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Nothing -> assertFailure "Failed to get Merkle path"
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Just p1 -> p1 `shouldNotBe` MerklePath 0 []
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it "Validate merkle path" $ do
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let tree =
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OrchardCommitmentTree $
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hexString
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"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"
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let cmx1 =
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hexString
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"1712ead46028d4349e234abf59e94e0640fe7a0829e2e2e17e1a931631810400" :: OrchardCommitment
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let cmx2 =
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hexString
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"39f5ad39817fb432fa07c5feb3a957189fbe7662a4b5555ca95093b6d853cf07" :: OrchardCommitment
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case getOrchardTreeParts tree of
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Nothing -> assertFailure "Failed to get tree parts"
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Just t1 -> do
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let newTree = mkOrchardTree t1
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let updatedTree = foldl append newTree [(cmx1, 4), (cmx2, 5)]
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case path 39735 updatedTree of
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Nothing -> assertFailure "Failed to get Merkle path"
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Just p1 -> do
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getOrchardPathAnchor cmx2 p1 `shouldBe`
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getHash (value updatedTree)
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describe "Creating Tx" $ do
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describe "Full" $ do
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it "To Orchard" $ do
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