feat: add function to fill tree to depth
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3 changed files with 134 additions and 45 deletions
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@ -5,42 +5,68 @@
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module Zenith.Tree where
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import Data.HexString
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import Data.Int (Int64)
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import ZcashHaskell.Orchard (combineOrchardNodes, getOrchardNodeValue)
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import ZcashHaskell.Types (OrchardFrontier(..))
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type Level = Integer
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maxLevel :: Level
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maxLevel = 32
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type Position = Int64
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class Monoid v =>
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Measured a v
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where
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measure :: a -> Integer -> v
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measure :: a -> Position -> v
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class Node v where
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getLevel :: v -> Level
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getTag :: v -> String
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getPosition :: v -> Integer
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getTag :: v -> HexString
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getPosition :: v -> Position
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isFull :: v -> Bool
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mkNode :: Level -> Position -> HexString -> v
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type Level = Int
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type OrchardCommitment = HexString
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type OrchardCommitment = String
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instance Measured [Char] OrchardNode where
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measure oc p = OrchardNode p oc 0 True
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instance Measured OrchardCommitment OrchardNode where
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measure oc p =
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case getOrchardNodeValue (hexBytes oc) of
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Nothing -> OrchardNode 0 (hexString "00") 0 True
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Just val -> OrchardNode p val 0 True
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data Tree v
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= Leaf !v
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= EmptyLeaf
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| Leaf !v
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| PrunedBranch !v
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| Branch !v !(Tree v) !(Tree v)
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| EmptyLeaf
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deriving (Eq)
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instance (Node v, Show v) => Show (Tree v) where
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show EmptyLeaf = "()"
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show (Leaf v) = "(" ++ show v ++ ")"
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show (Branch s x y) = "<" ++ getTag s ++ ">\n" ++ show x ++ "\n" ++ show y
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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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instance (Monoid v, Node v) => Semigroup (Tree v) where
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(<>) EmptyLeaf EmptyLeaf = PrunedBranch $ value $ branch EmptyLeaf EmptyLeaf
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(<>) EmptyLeaf x = x
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(<>) (Leaf x) EmptyLeaf = branch (Leaf x) EmptyLeaf
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(<>) (Leaf x) (Leaf y) = branch (Leaf x) (Leaf y)
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(<>) (Leaf x) Branch {} = Leaf x
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(<>) (Branch s x y) EmptyLeaf = branch (Branch s x y) EmptyLeaf
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(<>) (Leaf x) (PrunedBranch _) = Leaf x
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(<>) (PrunedBranch x) EmptyLeaf = PrunedBranch $ x <> x
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(<>) (PrunedBranch x) (Leaf _) = PrunedBranch x
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(<>) (PrunedBranch x) (Branch s t u) =
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if getLevel x == getLevel s
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then branch (PrunedBranch x) (Branch s t u)
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else EmptyLeaf
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(<>) (PrunedBranch x) (PrunedBranch y) = PrunedBranch $ x <> y
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(<>) (Branch s x y) EmptyLeaf =
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branch (Branch s x y) $ getEmptyRoot (getLevel s)
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(<>) (Branch s x y) (PrunedBranch _) = Branch s x y
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(<>) (Branch s x y) (Leaf w)
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| isFull s = Branch s x y <> mkSubTree (getLevel s) (Leaf w)
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| isFull (value x) = branch x (y <> Leaf w)
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@ -52,31 +78,47 @@ instance (Monoid v, Node v) => Semigroup (Tree v) where
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value :: Monoid v => Tree v -> v
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value EmptyLeaf = mempty
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value (Leaf v) = v
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value (PrunedBranch v) = v
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value (Branch v _ _) = v
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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 -> Integer -> Tree v
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leaf :: Measured a v => a -> Int64 -> Tree v
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leaf a p = Leaf (measure a p)
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prunedBranch :: Monoid v => Node v => Level -> Position -> HexString -> Tree v
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prunedBranch level pos val = PrunedBranch $ mkNode level pos val
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root :: Monoid v => Node v => Tree v -> Tree v
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root tree =
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if getLevel (value tree) == maxLevel - 1
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then tree
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else mkSubTree (maxLevel - 1) 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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data OrchardNode = OrchardNode
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{ on_position :: !Integer
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, on_value :: !String
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{ on_position :: !Position
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, on_value :: !HexString
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, on_level :: !Level
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, on_full :: !Bool
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} deriving (Eq)
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instance Semigroup OrchardNode where
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(<>) x y =
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case combineOrchardNodes (on_level x) (on_value x) (on_value y) of
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Nothing -> x
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Just newHash ->
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OrchardNode
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(max (on_position x) (on_position y))
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(on_value x <> on_value y)
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newHash
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(1 + on_level x)
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(on_full x && on_full y)
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instance Monoid OrchardNode where
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mempty = OrchardNode 0 "" 0 False
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mempty = OrchardNode 0 (hexString "00") 0 False
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mappend = (<>)
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instance Node OrchardNode where
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@ -84,9 +126,10 @@ instance Node OrchardNode where
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getTag = on_value
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getPosition = on_position
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isFull = on_full
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mkNode l p v = OrchardNode p v l True
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instance Show OrchardNode where
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show = on_value
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show = show . on_value
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instance Measured OrchardNode OrchardNode where
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measure o p = OrchardNode p (on_value o) (on_level o) (on_full o)
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@ -98,3 +141,21 @@ mkSubTree level t =
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else mkSubTree level subtree
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where
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subtree = t <> EmptyLeaf
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mkOrchardTree :: OrchardFrontier -> Tree OrchardNode
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mkOrchardTree (OrchardFrontier p l o) =
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if odd p
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then addOrchardOmmers (tail o) $
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Leaf (OrchardNode (p - 1) (head o) 0 True) <>
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Leaf (OrchardNode p l 0 True)
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else addOrchardOmmers o $ Leaf (OrchardNode p l 0 True) <> EmptyLeaf
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addOrchardOmmers :: [HexString] -> Tree OrchardNode -> Tree OrchardNode
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addOrchardOmmers xs t =
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foldl
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(\s x -> PrunedBranch (mkNode (getLevel $ value s) (p (value s)) x) <> s)
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t
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xs
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where
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p :: OrchardNode -> Position
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p (OrchardNode pos _ l _) = pos - (2 ^ l)
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72
test/Spec.hs
72
test/Spec.hs
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@ -10,7 +10,12 @@ import Database.Persist.Sqlite
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import System.Directory
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import Test.HUnit
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import Test.Hspec
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import ZcashHaskell.Orchard (isValidUnifiedAddress, parseAddress)
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import ZcashHaskell.Orchard
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( getOrchardFrontier
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, getOrchardTreeAnchor
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, isValidUnifiedAddress
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, parseAddress
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)
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import ZcashHaskell.Sapling
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( decodeSaplingOutputEsk
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, encodeSaplingAddress
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@ -25,6 +30,8 @@ import ZcashHaskell.Transparent
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)
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import ZcashHaskell.Types
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( DecodedNote(..)
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, OrchardCommitmentTree(..)
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, OrchardFrontier(..)
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, OrchardSpendingKey(..)
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, Phrase(..)
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, SaplingCommitmentTree(..)
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@ -583,28 +590,49 @@ main = do
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Left e -> assertFailure $ show e
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Right h -> h `shouldNotBe` (hexString "deadbeef")
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describe "Tree tests" $ do
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let cmx1 =
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hexString
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"1712ead46028d4349e234abf59e94e0640fe7a0829e2e2e17e1a931631810400"
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let t0 = EmptyLeaf <> EmptyLeaf :: Tree OrchardNode
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let t1 = t0 <> EmptyLeaf :: Tree OrchardNode
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let t1a = t0 <> t0
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it "Create leaf" $ do
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let a = "a" :: OrchardCommitment
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let n = append EmptyLeaf a :: Tree OrchardNode
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let n = leaf cmx1 1 :: Tree OrchardNode
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getLevel (value n) `shouldBe` 0
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it "Create minimal tree" $ do
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let a = "a" :: OrchardCommitment
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let b = "b" :: OrchardCommitment
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let n = append EmptyLeaf a :: Tree OrchardNode
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let t = append n b :: Tree OrchardNode
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let t = (leaf cmx1 1) <> EmptyLeaf :: Tree OrchardNode
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getLevel (value t) `shouldBe` 1
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it "Create bigger tree" $ do
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let a = "a" :: OrchardCommitment
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let b = "b" :: OrchardCommitment
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let c = "c" :: OrchardCommitment
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let d = "d" :: OrchardCommitment
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let n = append EmptyLeaf a :: Tree OrchardNode
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let t1 = append n b :: Tree OrchardNode
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let t2 = append t1 c :: Tree OrchardNode
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{-
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-let t3 = append t2 d :: Tree OrchardNode
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-}
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{-
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-getLevel (value t2) `shouldBe` 2
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-}
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t2 `shouldBe` EmptyLeaf
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it "Create minimal empty tree" $ do
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getTag (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" $ mkSubTree 2 EmptyLeaf `shouldBe` t1
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it "Create empty tree non-rec" $ getEmptyRoot 2 `shouldBe` t1
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it "Create a tree from Frontier" $ 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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case getOrchardFrontier tree of
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Nothing -> assertFailure "Failed to get frontier"
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Just t1 -> do
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of_ommers t1 `shouldBe` []
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it "Validate a tree's depth from Frontier" $ 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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case getOrchardFrontier tree of
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Nothing -> assertFailure "Failed to get frontier"
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Just t1 -> do
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let t = root $ mkOrchardTree t1
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getLevel (value t) `shouldBe` 31
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it "Validate a tree from Frontier" $ 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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case getOrchardFrontier tree of
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Nothing -> assertFailure "Failed to get frontier"
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Just t1 -> do
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let t = root $ mkOrchardTree t1
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getTag (value t) `shouldBe` getOrchardTreeAnchor t1
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@ -1 +1 @@
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Subproject commit 662a0d1148d3f52e2683157a4c9280bb8e81b0cb
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Subproject commit b6d490d05300a9db9cdf9929baa9b984bee9f3f6
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