rvva040 - Convert Sapling receiver to Human readable format

Function getSaplingFromUA -> Now returns "Maybe T.Text" instead of "T.Text"

src/ZcashHaskell/Orchard.hs

@@ -157,17 +157,17 @@ decryptOrchardAction key encAction =
 chrToByteString :: [Char] -> C.ByteString
 chrToByteString = C.pack
 
-getSaplingFromUA :: BS.ByteString -> T.Text
+getSaplingFromUA :: BS.ByteString -> Maybe T.Text
 getSaplingFromUA uadd = do 
   let a = isValidUnifiedAddress uadd
   case a of  
-    Nothing -> "xxx"
+    Nothing -> Nothing
     Just a -> do
        let sraw = s_rec a
        case sraw of
-          Nothing -> "xxx"  
+          Nothing -> Nothing  
           Just sraw -> do 
             let net = ua_net a
             case net of
-              MainNet -> encodeBech32 (chrToByteString sapPaymentAddressHrp) ( getBytes sraw )
+              MainNet -> Just $ encodeBech32 (chrToByteString sapPaymentAddressHrp) ( getBytes sraw )
-              TestNet -> encodeBech32 (chrToByteString sapTestPaymentAddressHrp) ( getBytes sraw )
+              TestNet -> Just $ encodeBech32 (chrToByteString sapTestPaymentAddressHrp) ( getBytes sraw )

test/Spec.hs

@@ -844,11 +844,18 @@ main = do
               let tb = zt_tBundle t'
               print tb
               show tb `shouldNotBe` ""
-      describe "Extract Sapling Address" $ do
+      describe "Extract Sapling Address - UA Valid" $ do
         let sr = getSaplingFromUA "u14a5c4ufn9feqvxssnvscep29j5cse4gjpg0w3w5vjhafn74hg9k73xgnxqv6m255n23weggr6j97c8kdwvn4pkz7rz6my52z8248gjmr7knlw536tcurs5km7knqnzez4cywudt3q6shr553hurduvljfeqvfzgegenfjashslkz3y4ykhxel6mrjp9gsm9xk7k6kdxn9y84kccmv8l"
         it "Extract sapling address" $ do
-            print sr  
+          case sr of 
-            sr `shouldBe` "zs1waxrpde36rlrjdwfhnvw030sn29lzwmvmeupd8x2uuqgypaafx7mqcy0ep8yf2xtg30n5424t60"
+            Nothing -> assertFailure "UA invalid or does not contain a Sapling receiver"
+            Just t -> do
+              print t  
+              t `shouldBe` "zs1waxrpde36rlrjdwfhnvw030sn29lzwmvmeupd8x2uuqgypaafx7mqcy0ep8yf2xtg30n5424t60"
+      describe "Extract Sapling Address - UA Invalid" $ do
+        let sr = getSaplingFromUA "u14a5c4ufn9qfevxssnvscep29j5cse4gjpg0w3w5vjhafn74hg9k73xgnxqv6m255n23weggr6j97c8kdwvn4pkz7rz6my52z8248gjmr7knlw536tcurs5km7knqnzez4cywudt3q6shr553hurduvljfeqvfzgegenfjashslkz3y4ykhxel6mrjp9gsm9xk7k6kdxn9y84kccmv8l"
+        it "Try to extract sapling address from invalid UA" $ do
+          sr `shouldBe` Nothing 
 
 
 -- | Properties