Add functions to compare and validate addresses

src/ZcashHaskell/Orchard.hs

@@ -37,6 +37,11 @@ import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
 import Data.Word
 import Foreign.Rust.Marshall.Variable
+import ZcashHaskell.Sapling (decodeSaplingAddress)
+import ZcashHaskell.Transparent
+  ( decodeExchangeAddress
+  , decodeTransparentAddress
+  )
 import ZcashHaskell.Types
 import ZcashHaskell.Utils (encodeBech32, encodeBech32m, f4Jumble)
 
@@ -221,8 +226,33 @@ getOrchardNotePosition :: OrchardWitness -> Integer
 getOrchardNotePosition =
   fromIntegral . rustWrapperReadOrchardPosition . hexBytes . orchWit
 
+-- | Update the witness of an Orchard note
 updateOrchardWitness :: OrchardWitness -> [HexString] -> OrchardWitness
 updateOrchardWitness wit cmus =
   OrchardWitness $
   withPureBorshVarBuffer $
   rustWrapperUpdateOrchardWitness (toBytes $ orchWit wit) (map toBytes cmus)
+
+-- | Parse a potential Zcash address
+parseAddress :: BS.ByteString -> Maybe ValidAddress
+parseAddress t =
+  case isValidUnifiedAddress t of
+    Nothing ->
+      case decodeSaplingAddress t of
+        Nothing ->
+          case decodeTransparentAddress t of
+            Nothing ->
+              case decodeExchangeAddress t of
+                Nothing -> Nothing
+                Just x -> Just $ Exchange x
+            Just t -> Just $ Transparent t
+        Just s -> Just $ Sapling s
+    Just u -> Just $ Unified u
+
+compareAddress :: ValidAddress -> UnifiedAddress -> Bool
+compareAddress a u =
+  case a of
+    Unified i -> i == u
+    Sapling s -> s_rec u == Just (sa_receiver s) && ua_net u == net_type s
+    Transparent t -> t_rec u == Just (ta_receiver t) && ua_net u == ta_network t
+    Exchange x -> False