rvv001 - Issue 0085 - URI support implemented in TUI - "Processing URI ..." message added

- Payment URI Creation added to TUI
		      supports Unified, Sapling and Transparent address

.gitignore

@@ -5,3 +5,7 @@ zenith.db
 zenith.log
 zenith.db-shm
 zenith.db-wal
+test.db
+test.db-shm
+test.db-wal
+

app/Main.hs

@@ -210,9 +210,18 @@ main = do
   zebraPort <- require config "zebraPort"
   zebraHost <- require config "zebraHost"
   nodePort <- require config "nodePort"
+  currencyCode <- require config "currencyCode"
   dbFP <- getZenithPath
   let dbFilePath = T.pack $ dbFP ++ dbFileName
-  let myConfig = Config dbFilePath zebraHost zebraPort nodeUser nodePwd nodePort
+  let myConfig =
+        Config
+          dbFilePath
+          zebraHost
+          zebraPort
+          nodeUser
+          nodePwd
+          nodePort
+          currencyCode
   if not (null args)
     then do
       case head args

app/Server.hs

@@ -35,9 +35,18 @@ main = do
   zebraPort <- require config "zebraPort"
   zebraHost <- require config "zebraHost"
   nodePort <- require config "nodePort"
+  currencyCode <- require config "currencyCode"
   dbFP <- getZenithPath
   let dbFilePath = T.pack $ dbFP ++ dbFileName
-  let myConfig = Config dbFilePath zebraHost zebraPort nodeUser nodePwd nodePort
+  let myConfig =
+        Config
+          dbFilePath
+          zebraHost
+          zebraPort
+          nodeUser
+          nodePwd
+          nodePort
+          currencyCode
   let ctx = authenticate myConfig :. EmptyContext
   w <- try $ checkZebra zebraHost zebraPort :: IO (Either IOError ZebraGetInfo)
   case w of

src/Zenith/CLI.hs

@@ -75,7 +75,7 @@ import Control.Monad.Logger
 import Data.Aeson
 import Data.HexString (HexString(..), toText)
 import Data.Maybe
-import Data.Scientific (Scientific, scientific)
+import Data.Scientific (Scientific, scientific, fromFloatDigits, toRealFloat)
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
 import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
@@ -89,8 +89,14 @@ import Lens.Micro.Mtl
 import Lens.Micro.TH
 import System.Hclip
 import Text.Printf
-import Text.Wrap (FillScope(..), FillStrategy(..), WrapSettings(..))
-import ZcashHaskell.Keys (generateWalletSeedPhrase)
+import Text.Wrap
+  ( FillScope(..)
+  , FillStrategy(..)
+  , WrapSettings(..)
+  , defaultWrapSettings
+  , wrapTextToLines
+  )
+import ZcashHaskell.Keys (generateWalletSeedPhrase, deriveUfvk, deriveUivk)
 import ZcashHaskell.Orchard
   ( getSaplingFromUA
   , isValidUnifiedAddress
@@ -116,16 +122,24 @@ import Zenith.Types
   , ValidAddressAPI(..)
   , ZcashNetDB(..)
   , ZenithStatus(..)
+  , OrchardSpendingKeyDB(..)
+  , SaplingSpendingKeyDB(..)
+  , TransparentSpendingKeyDB(..)
+  , ZcashPaymentURI(..)
+  , ZcashPool(..)
   )
 import Zenith.Utils
   ( displayTaz
   , displayZec
   , getChainTip
+  , getZcashPrice
   , isRecipientValid
   , isRecipientValidGUI
   , jsonNumber
   , showAddress
   , validBarValue
+  , parseZcashPayment
+  , createZip321
   )
 
 data Name
@@ -150,6 +164,10 @@ data Name
   | DeshieldField
   | TotalTranspField
   | TotalShieldedField
+  | SFBViewPort
+  | URITransparentAddress
+  | URISaplingAddress
+  | URIUnifiedAddress
   deriving (Eq, Show, Ord)
 
 data DialogInput = DialogInput
@@ -180,6 +198,21 @@ newtype ShDshEntry = ShDshEntry
 
 makeLenses ''ShDshEntry
 
+data PaymentInput = PaymentInput
+  { _pmtAddressPool :: ZcashPool
+  , _pmtAmt :: !Scientific
+  , _pmtMemo :: !T.Text
+  } deriving (Show)
+
+makeLenses ''PaymentInput
+
+data URIText = URIText
+  {
+    _uriString :: !T.Text
+  } deriving (Show)
+
+makeLenses ''URIText
+
 data DialogType
   = WName
   | AName
@@ -194,6 +227,13 @@ data DialogType
   | AdrBookDelForm
   | DeshieldForm
   | ShieldForm
+  | ShowFIATBalance
+  | ViewingKeyMenu
+  | ViewingKeyShow
+  | PaymentURICreate
+  | PaymentURIShow
+  | PayUsingURIShow
+  | ProcessURIMenu
 
 data DisplayType
   = AddrDisplay
@@ -211,7 +251,7 @@ data Tick
   | TickMsg !String
   | TickTx !HexString
 
-data DropDownItem =
+newtype DropDownItem =
   DropdownItem String
 
 data State = State
@@ -245,10 +285,37 @@ data State = State
   , _deshieldForm :: !(Form ShDshEntry () Name)
   , _tBalance :: !Integer
   , _sBalance :: !Integer
+  , _currencyCode :: !T.Text
+  , _zprice :: !Double
+  , _vkName :: !T.Text
+  , _vkData :: !T.Text
+  , _pmtURIForm :: !(Form PaymentInput () Name)
+  , _payUsingURIForm :: !(Form URIText () Name)
   }
 
 makeLenses ''State
 
+scientificToDouble :: Scientific -> Double
+scientificToDouble = toRealFloat
+
+zBalance :: State -> Double
+zBalance st = (fromIntegral (st ^. balance)) / 100000000
+
+-- Function to split text into fixed-size chunks
+splitText :: Int -> T.Text -> [T.Text]
+splitText chunkSize text =
+  let strippedText = T.filter (/= '\n') text -- Remove newlines
+   in if T.null strippedText
+        then []
+        else T.take chunkSize strippedText :
+             splitText chunkSize (T.drop chunkSize strippedText)
+
+-- Create a widget to display the long text
+renderLongText :: Int -> T.Text -> Widget Name
+renderLongText lineLength longText =
+  let linesOfText = splitText lineLength longText
+   in vBox $ map txt linesOfText
+
 drawUI :: State -> [Widget Name]
 drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
   where
@@ -298,13 +365,16 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
                 [ capCommand "W" "allets"
                 , capCommand "A" "ccounts"
                 , capCommand "V" "iew address"
-                , capCommand3 "" "S" "end Tx"
+                , capCommand "S" "end Tx"
+                , capCommand "U" "RI Support"
+                , capCommand3 "ba" "L" ("ance (" ++ (T.unpack (st ^. currencyCode)) ++ ")")
                 ])
          , C.hCenter
              (hBox
                 [ capCommand2 "Address " "B" "ook"
                 , capCommand2 "s" "H" "ield"
                 , capCommand "D" "e-shield"
+                , capCommand2 "Viewing " "K" "eys"
                 , capCommand "Q" "uit"
                 , capCommand "?" " Help"
                 , str $ show (st ^. timer)
@@ -375,7 +445,9 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
         else emptyWidget
       where
         keyList =
-          map (C.hCenter . str) ["?", "Esc", "w", "a", "v", "s", "b", "d", "q"]
+          map
+            (C.hCenter . str)
+            ["?", "Esc", "w", "a", "v", "s", "u", "b", "d", "k", "l", "q"]
         actionList =
           map
             (hLimit 40 . str)
@@ -385,8 +457,11 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
             , "Switch accounts"
             , "View address"
             , "Send Tx"
+            , "URI Menu"
             , "Address Book"
             , "Shield/De-Shield"
+            , "Viewing Keys"
+            , "Balance in Fiat"
             , "Quit"
             ]
     inputDialog :: State -> Widget Name
@@ -432,7 +507,40 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
             (D.dialog (Just (str " Send Transaction ")) Nothing 50)
             (renderForm (st ^. txForm) <=>
              C.hCenter
-               (hBox [capCommand "↲ " "Send", capCommand "<esc> " "Cancel"]))
+               (hBox [capCommand "↲ " "Send", capCommand3 " " "<esc> " "Cancel"]))
+        --    
+        -- URI Support
+        --
+        -- | Create a New payment URI 
+        PaymentURICreate ->
+          D.renderDialog
+            (D.dialog (Just (str " Create Payment URI ")) Nothing 50)
+            (renderForm (st ^. pmtURIForm) <=>
+             C.hCenter
+               (hBox
+                  [capCommand "↲ " "Process", capCommand3 " " "<esc> " "Cancel"]))
+        --
+        -- | Show Paument URI
+        PaymentURIShow ->
+          D.renderDialog
+            (D.dialog
+               (Just (str (" Payment URI ")))
+               Nothing
+               50)
+            (padAll 1 (C.hCenter (renderLongText 45 (st ^. vkData))) <=>
+             C.hCenter
+               (hBox
+                  [capCommand "C" "opy to Clipoard", capCommand3 "" "E" "xit"]))
+        -- 
+        -- | Pay using a URI
+        PayUsingURIShow ->
+          D.renderDialog
+            (D.dialog (Just (str " Pay Using URI ")) Nothing 50)
+            (renderForm (st ^. payUsingURIForm) <=>
+             C.hCenter
+               (hBox
+                  [capCommand "↲ " "Process", capCommand3 " " "<esc> " "Cancel"]))
+        --
         DeshieldForm ->
           D.renderDialog
             (D.dialog (Just (str " De-Shield ZEC ")) Nothing 50)
@@ -452,7 +560,7 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
                   ]) <=>
              renderForm (st ^. deshieldForm) <=>
              C.hCenter
-               (hBox [capCommand "P" "roceed", capCommand "<esc> " "Cancel"]))
+               (hBox [capCommand "P" "roceed", capCommand3 "" "<esc> " "Cancel"]))
         ShieldForm ->
           D.renderDialog
             (D.dialog (Just (str " Shield ZEC ")) Nothing 50)
@@ -463,7 +571,35 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
                   then displayZec (st ^. tBalance)
                   else displayTaz (st ^. tBalance) ++ "?") <=>
              C.hCenter
-               (hBox [capCommand "P" "roceed", capCommand "<esc> " "Cancel"]))
+               (hBox [capCommand "P" "roceed", capCommand3 "" "<esc> " "Cancel"]))
+        ViewingKeyShow ->
+          D.renderDialog
+            (D.dialog
+               (Just (str (" " ++ (T.unpack (st ^. vkName)) ++ " Viewing Key ")))
+               Nothing
+               50)
+            (padAll 1 (C.hCenter (renderLongText 45 (st ^. vkData))) <=>
+             C.hCenter
+               (hBox
+                  [capCommand "C" "opy to Clipoard", capCommand3 "" "E" "xit"]))
+        ViewingKeyMenu ->
+          D.renderDialog
+            (D.dialog (Just (str " Viewing Keys ")) Nothing 50)
+            (C.hCenter
+               (hBox
+                  [ capCommand "F" "ull"
+                  , capCommand "I" "ncoming"
+                  , capCommand3 "" "E" "xit"
+                  ]))
+        ProcessURIMenu ->
+          D.renderDialog
+            (D.dialog (Just (str " URI Support ")) Nothing 50)
+            (C.hCenter
+               (hBox
+                  [ capCommand "C" "reate Payment URI"
+                  , capCommand "P" "ay using an URI"
+                  , capCommand3 "" "E" "xit"
+                  ]))
         Blank -> emptyWidget
         -- Address Book List
         AdrBook ->
@@ -516,6 +652,50 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
                   [ capCommand "C" "onfirm delete"
                   , capCommand3 "" "<Esc>" " Cancel"
                   ]))
+        -- Show Balance in FIAT form
+        ShowFIATBalance ->
+          D.renderDialog
+            (D.dialog
+               (Just $
+                str
+                  (" Account Balance (" ++
+                   (T.unpack (st ^. currencyCode)) ++ ") "))
+               Nothing
+               60)
+            (withAttr abDefAttr $
+             setAvailableSize (50, 8) $
+             viewport SFBViewPort BT.Vertical $
+             vLimit 8 $
+             hLimit 50 $
+             vBox $
+             [ vLimit 4 $
+               hLimit 50 $
+               vBox $
+               [ C.hCenter (str $ " ")
+               , C.hCenter
+                   (str $
+                    "1 ZEC = " ++
+                    (printf "%.2f" (s ^. zprice)) ++
+                    " " ++ (T.unpack (s ^. currencyCode)))
+               , C.hCenter (str $ " ")
+               , C.hCenter
+                   (str $
+                    " Balance: " ++
+                    (printf "%.8f" $ zBalance s) ++
+                    " ZEC ==> " ++
+                    (printf "%.2f" ((s ^. zprice) * (zBalance s)) ++
+                     " " ++ (T.unpack (s ^. currencyCode))))
+               ]
+             , padTop Max $
+               vLimit 4 $
+               hLimit 50 $
+               withAttr abMBarAttr $
+               vBox $
+               [ C.hCenter (str " ")
+               , C.hCenter $
+                 (capCommand "R" "efresh" <+> capCommand3 "E" "x" "it")
+               ]
+             ])
         --
     splashDialog :: State -> Widget Name
     splashDialog st =
@@ -549,7 +729,7 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
               withBorderStyle unicodeBold $
               D.renderDialog
                 (D.dialog
-                   (Just $ txt ("Address: " <> walletAddressName (entityVal a)))
+                   (Just $ txt (" Address: " <> walletAddressName (entityVal a) <> " "))
                    Nothing
                    60)
                 (padAll 1 $
@@ -577,7 +757,7 @@ drawUI s = [splashDialog s, helpDialog s, displayDialog s, inputDialog s, ui s]
                       [ str "Copy: "
                       , capCommand "U" "nified"
                       , capCommand "S" "apling"
-                      , capCommand "T" "ransparent"
+                      , capCommand3 " " "T" "ransparent"
                       ]) <=>
                  C.hCenter xCommand)
             Nothing -> emptyWidget
@@ -707,6 +887,35 @@ mkSendForm bal =
     label s w =
       padBottom (Pad 1) $ vLimit 1 (hLimit 15 $ str s <+> fill ' ') <+> w
 
+mkPaymentURIForm :: PaymentInput -> Form PaymentInput e Name
+mkPaymentURIForm  =
+  newForm
+    [ label "Pmt. Address:" @@=
+       radioField
+        pmtAddressPool
+        [ (OrchardPool, URIUnifiedAddress, "Unified")
+        , (SaplingPool, URISaplingAddress, "Sapling")
+        , (TransparentPool, URITransparentAddress, "Transparent")
+        ]
+    , label "Amount (Zec): " @@=
+      editShowableFieldWithValidate pmtAmt AmtField (isAmountValid )
+    , label "Memo:   " @@= editTextField pmtMemo MemoField (Just 1)
+    ]
+  where
+    isAmountValid :: Scientific -> Bool
+    isAmountValid i = i > 0.0
+    label s w =
+      padBottom (Pad 1) $ vLimit 1 (hLimit 20 $ str s <+> fill ' ') <+> w
+
+mkPayUsingURIForm :: URIText -> Form URIText e Name
+mkPayUsingURIForm =
+  newForm
+    [ label " URI: " @@= editTextField uriString MemoField (Just 1)
+    ]
+  where
+    label s w =
+      padBottom (Pad 1) $ vLimit 1 (hLimit 15 $ str s <+> fill ' ') <+> w
+
 mkDeshieldForm :: Integer -> ShDshEntry -> Form ShDshEntry e Name
 mkDeshieldForm tbal =
   newForm
@@ -716,9 +925,21 @@ mkDeshieldForm tbal =
   where
     isAmountValid :: Integer -> Scientific -> Bool
     isAmountValid b i = fromIntegral b >= (i * scientific 1 8)
+    label s w =
+      padBottom (Pad 1) $ vLimit 1 (hLimit 25 $ str s <+> fill ' ') <+> w
+{--
+mkShieldForm :: Integer -> ShDshEntry -> Form ShDshEntry e Name
+mkShieldForm bal =
+  newForm
+    [ label "Amount to Shield: " @@=
+      editShowableFieldWithValidate shAmt AmtField (isAmountValid bal)
+    ]
+  where
+    isAmountValid :: Integer -> Scientific -> Bool
+    isAmountValid b i = (fromIntegral b / 100000000.0) >= i
     label s w =
       padBottom (Pad 1) $ vLimit 1 (hLimit 15 $ str s <+> fill ' ') <+> w
-
+--}
 mkNewABForm :: AdrBookEntry -> Form AdrBookEntry e Name
 mkNewABForm =
   newForm
@@ -935,7 +1156,8 @@ appEvent (BT.AppEvent t) = do
                    (s ^. zebraPort)
                    "user"
                    "pwd"
-                   8080)
+                   8080
+                   (s ^. currencyCode))
                 selWallet
             updatedState <- BT.get
             ns <- liftIO $ refreshWallet updatedState
@@ -982,6 +1204,13 @@ appEvent (BT.AppEvent t) = do
             AdrBookDelForm -> return ()
             DeshieldForm -> return ()
             ShieldForm -> return ()
+            ViewingKeyShow -> return ()
+            ViewingKeyMenu -> return ()
+            ProcessURIMenu -> return ()
+            ShowFIATBalance -> return ()
+            PaymentURICreate -> return ()
+            PaymentURIShow -> return ()
+            PayUsingURIShow -> return ()
             Blank -> do
               if s ^. timer == 90
                 then do
@@ -1559,7 +1788,198 @@ appEvent (BT.VtyEvent e) = do
                        ev ->
                          BT.zoom deshieldForm $ do
                            handleFormEvent (BT.VtyEvent ev)
+                   --
+                   -- Process ShowFIATBalance events 
+                   --       
+                   ShowFIATBalance -> do
+                     case e of
+                       V.EvKey (V.KChar 'x') [] ->
+                         BT.modify $ set dialogBox Blank
+                       V.EvKey (V.KChar 'r') [] -> do
+                         BT.modify $ set dialogBox Blank
+                         zpr <- liftIO $ getZcashPrice $ s ^. currencyCode
+                         case zpr of
+                           Just p -> do
+                             BT.modify $ set zprice p
+                             BT.modify $ set dialogBox ShowFIATBalance
+                           Nothing -> do
+                             BT.modify $
+                               set msg ("CoinGecko is not responding!!!")
+                             BT.modify $ set displayBox MsgDisplay
                       -- Process any other event       
+                       ev -> BT.zoom abAddresses $ L.handleListEvent ev
+                   --
+                   -- Viewing Key Display Support
+                   --
+                   ViewingKeyShow -> do
+                     case e of
+                       V.EvKey (V.KChar 'c') [] -> do
+                         liftIO $ setClipboard $ T.unpack $ s ^. vkData
+                         BT.modify $
+                           set msg $
+                           (T.unpack (s ^. vkName)) ++
+                           " viewing key copied to Clipboard!!"
+                         BT.modify $ set displayBox MsgDisplay
+                       V.EvKey (V.KChar 'e') [] -> do
+                         BT.modify $ set vkName ""
+                         BT.modify $ set vkData ""
+                         BT.modify $ set dialogBox ViewingKeyMenu
+                       ev -> return ()
+                   --
+                   -- Open viewing key display form
+                   --
+                   ViewingKeyMenu -> do
+                     case e of
+                       -- 
+                       -- Full viewing key display
+                       --
+                       V.EvKey (V.KChar 'f') [] -> do
+                          selAccount <-
+                            do case L.listSelectedElement $ s ^. accounts of
+                                 Nothing -> do
+                                   let fAcc =
+                                         L.listSelectedElement $ L.listMoveToBeginning $ s ^. accounts
+                                   case fAcc of
+                                     Nothing -> throw $ userError "Failed to select account"
+                                     Just (_j, w1) -> return w1
+                                 Just (_k, w) -> return w
+                          let osk = getOrchSK $ zcashAccountOrchSpendKey $ entityVal selAccount
+                          let ssk = getSapSK $ zcashAccountSapSpendKey $ entityVal selAccount
+                          let tsk = getTranSK $ zcashAccountTPrivateKey $ entityVal selAccount
+                          fvk <- liftIO $ deriveUfvk (s ^. network) osk ssk tsk
+                          BT.modify $ set vkName "Full"
+                          BT.modify $ set vkData fvk
+                          BT.modify $ set dialogBox ViewingKeyShow
+                       --   
+                       -- Incoming viewing key display
+                       --
+                       V.EvKey (V.KChar 'i') [] -> do
+                          selAccount <-
+                            do case L.listSelectedElement $ s ^. accounts of
+                                 Nothing -> do
+                                   let fAcc =
+                                         L.listSelectedElement $ L.listMoveToBeginning $ s ^. accounts
+                                   case fAcc of
+                                     Nothing -> throw $ userError "Failed to select account"
+                                     Just (_j, w1) -> return w1
+                                 Just (_k, w) -> return w
+                          let osk = getOrchSK $ zcashAccountOrchSpendKey $ entityVal selAccount
+                          let ssk = getSapSK $ zcashAccountSapSpendKey $ entityVal selAccount
+                          let tsk = getTranSK $ zcashAccountTPrivateKey $ entityVal selAccount
+                          ivk <- liftIO $ deriveUivk (s ^. network) osk ssk tsk
+                          BT.modify $ set vkName "Incomming"
+                          BT.modify $ set vkData ivk
+                          BT.modify $ set dialogBox ViewingKeyShow
+                       V.EvKey (V.KChar 'e') [] ->
+                          BT.modify $ set dialogBox Blank
+                       ev -> return ()
+                   --
+                   -- Create Payment URI Form Events
+                   --
+                   PaymentURICreate -> do
+                     case e of
+                       V.EvKey V.KEnter [] -> do
+                          fs <- BT.zoom pmtURIForm $ BT.gets formState
+                          case L.listSelectedElement $ s ^. addresses of
+                            Just (_, a) -> do
+                               let za = case (fs ^. pmtAddressPool) of
+                                          OrchardPool -> getUA $ walletAddressUAddress $ entityVal a
+                                          SaplingPool ->
+                                              case (getSaplingFromUA $ E.encodeUtf8 $ getUA $ walletAddressUAddress $ entityVal a) of
+                                                Just sa -> sa
+                                                _       -> ""
+                                          TransparentPool -> do 
+                                              let trec = t_rec =<< (isValidUnifiedAddress . E.encodeUtf8 . getUA . walletAddressUAddress) (entityVal a)  
+                                              case trec of 
+                                                Just tr -> encodeTransparentReceiver (s ^. network) tr 
+                                                _       -> ""
+                                          --    
+                                          _           -> ""
+                               let amt = scientificToDouble (fs ^. pmtAmt)
+                               if amt > 0.0 
+                                then do 
+                                  let mm = ( fs ^. pmtMemo )
+                                  BT.modify $ set vkData (T.pack (createZip321 (T.unpack za) (Just amt) (Just (T.unpack mm)) ))
+                                  BT.modify $ set dialogBox PaymentURIShow
+                                else do 
+                                  BT.modify $ set msg " Must provide an amount!! "
+                                  BT.modify $ set displayBox MsgDisplay
+                            Nothing -> do
+                               BT.modify $ set msg " No Zcash address available!! "
+                               BT.modify $ set displayBox MsgDisplay
+                       V.EvKey V.KEsc [] -> BT.modify $ set dialogBox Blank
+                       ev -> do
+                          BT.zoom pmtURIForm $ do
+                            handleFormEvent (BT.VtyEvent ev)
+                   --
+                   -- Show Payment URI Form Events
+                   --
+                   PaymentURIShow -> do
+                     case e of
+                       V.EvKey (V.KChar 'c') [] -> do
+                         liftIO $ setClipboard $ T.unpack $ s ^. vkData
+                         BT.modify $ set msg " URI copied to Clipboard!!"
+                         BT.modify $ set displayBox MsgDisplay
+                       V.EvKey (V.KChar 'e') [] -> BT.modify $ set dialogBox Blank
+                       ev -> do
+                          BT.zoom pmtURIForm $ do
+                            handleFormEvent (BT.VtyEvent ev)
+                   --
+                   -- Pay using URI Form Events
+                   --
+                   PayUsingURIShow -> do
+                     case e of
+                       V.EvKey V.KEnter [] -> do
+                         fs <- BT.zoom payUsingURIForm $ BT.gets formState
+                         let zp = parseZcashPayment $ T.unpack (fs ^. uriString)
+                         case zp of
+                           Right p -> do
+                             case uriAmount p of
+                               Just a -> do
+                                 BT.modify $
+                                   set txForm $
+                                   mkSendForm
+                                     (s ^. balance)
+                                     (SendInput
+                                        (T.pack (uriAddress p))
+                                        (fromFloatDigits a)
+                                        (uriMemo p)
+                                        Full)
+                                 BT.modify $ set dialogBox SendTx
+                               Nothing -> do
+                                 BT.modify $
+                                   set
+                                     msg "URI error - Invalid value "
+                                 BT.modify $ set displayBox MsgDisplay
+                           Left e -> do
+                             BT.modify $
+                               set msg  e
+                             BT.modify $ set displayBox MsgDisplay
+                       V.EvKey V.KEsc [] -> BT.modify $ set dialogBox Blank
+                       ev -> do
+                         BT.zoom payUsingURIForm $ do
+                           handleFormEvent (BT.VtyEvent ev)
+                   --
+                   -- Open URI process form
+                   --
+                   ProcessURIMenu -> do
+                     case e of
+                        V.EvKey (V.KChar 'c') [] -> do
+                          BT.modify $
+                            set pmtURIForm $
+                            mkPaymentURIForm (PaymentInput OrchardPool 0.0 "")
+                          BT.modify $ set dialogBox PaymentURICreate
+                        V.EvKey (V.KChar 'p') [] -> do
+                          BT.modify $
+                            set payUsingURIForm $
+                            mkPayUsingURIForm (URIText "")
+                          BT.modify $ set dialogBox PayUsingURIShow
+                        V.EvKey (V.KChar 'e') [] ->
+                          BT.modify $ set dialogBox Blank
+                        ev -> return ()
+                   --
+                   -- Process any other event    
+                   --
                    Blank -> do
                      case e of
                        V.EvKey (V.KChar '\t') [] -> focusRing %= F.focusNext
@@ -1583,8 +2003,31 @@ appEvent (BT.VtyEvent e) = do
                            set txForm $
                            mkSendForm (s ^. balance) (SendInput "" 0.0 "" Full)
                          BT.modify $ set dialogBox SendTx
+                       V.EvKey (V.KChar 'u') [] ->
+                         BT.modify $ set dialogBox ProcessURIMenu
                        V.EvKey (V.KChar 'b') [] ->
                          BT.modify $ set dialogBox AdrBook
+                       V.EvKey (V.KChar 'l') [] -> do
+                         if s ^. network == MainNet
+                           then do
+                             zpr <- liftIO $ getZcashPrice $ s ^. currencyCode
+                             case zpr of
+                               Just p -> do
+                                 BT.modify $ set zprice p
+                                 BT.modify $ set dialogBox ShowFIATBalance
+                               Nothing -> do
+                                 BT.modify $
+                                   set
+                                     msg
+                                     ("Currency not supported (" ++
+                                      T.unpack (s ^. currencyCode) ++ ")!!!")
+                                 BT.modify $ set displayBox MsgDisplay
+                           else do
+                             BT.modify $
+                               set
+                                 msg
+                                 "Balance conversion not available for TestNet"
+                             BT.modify $ set displayBox MsgDisplay
                        V.EvKey (V.KChar 'd') [] -> do
                          pool <- liftIO $ runNoLoggingT $ initPool $ s ^. dbPath
                          selAcc <-
@@ -1636,6 +2079,10 @@ appEvent (BT.VtyEvent e) = do
                                  msg
                                  "Not enough transparent funds in this account"
                              BT.modify $ set displayBox MsgDisplay
+                       V.EvKey (V.KChar 'k') [] -> do
+                         BT.modify $ set dialogBox ViewingKeyMenu
+                       V.EvKey (V.KChar 'u') [] -> do
+                         BT.modify $ set dialogBox ViewingKeyMenu
                        ev ->
                          case r of
                            Just AList ->
@@ -1650,8 +2097,8 @@ appEvent (BT.VtyEvent e) = do
     printMsg s = BT.modify $ updateMsg s
     updateMsg :: String -> State -> State
     updateMsg = set msg
---                            fs <- BT.gets formState
---                        ev -> BT.zoom shdshForm $ L.handleListEvent ev
+-- 
+--  
 appEvent _ = return ()
 
 theMap :: A.AttrMap
@@ -1690,6 +2137,7 @@ runZenithTUI config = do
   let host = c_zebraHost config
   let port = c_zebraPort config
   let dbFilePath = c_dbPath config
+  let currencyCode = c_currencyCode config
   pool <- runNoLoggingT $ initPool dbFilePath
   w <- try $ checkZebra host port :: IO (Either IOError ZebraGetInfo)
   case w of
@@ -1787,6 +2235,12 @@ runZenithTUI config = do
                   (mkDeshieldForm 0 (ShDshEntry 0.0))
                   tBal
                   sBal
+                  currencyCode
+                  0
+                  ""
+                  ""
+                  (mkPaymentURIForm $ PaymentInput OrchardPool 0.0 "")
+                  (mkPayUsingURIForm $ URIText "")
     Left _e -> do
       print $
         "No Zebra node available on port " <>

src/Zenith/GUI.hs

@@ -22,11 +22,15 @@ import Control.Monad.Logger
   )
 import Data.Aeson
 import qualified Data.ByteString as BS
+import qualified Data.ByteString.Lazy as BL
 import Data.HexString (toText)
 import Data.Maybe (fromMaybe, isJust, isNothing)
 import Data.Scientific (Scientific, fromFloatDigits)
+import Data.Text (Text)
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
+import qualified Data.Text.Lazy as TL
+import qualified Data.Text.Lazy.Encoding as TLE
 import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
 import Database.Esqueleto.Experimental (ConnectionPool, fromSqlKey)
 import Database.Persist
@@ -36,10 +40,10 @@ import Monomer
 import qualified Monomer.Lens as L
 import System.Directory (getHomeDirectory)
 import System.FilePath ((</>))
-import Text.Printf
+import Text.Printf (printf)
 import Text.Wrap (FillScope(..), FillStrategy(..), WrapSettings(..), wrapText)
 import TextShow hiding (toText)
-import ZcashHaskell.Keys (generateWalletSeedPhrase)
+import ZcashHaskell.Keys (generateWalletSeedPhrase, deriveUfvk, deriveUivk)
 import ZcashHaskell.Orchard
   ( getSaplingFromUA
   , isValidUnifiedAddress
@@ -75,8 +79,17 @@ import Zenith.Utils
   , padWithZero
   , showAddress
   , validBarValue
+  , parseZcashPayment
+  , getZcashPrice
+  , createZip321
   )
 
+data VkTypeDef
+  = VkNone
+  | VkFull
+  | VkIncoming
+  deriving (Eq, Show)
+
 data AppEvent
   = AppInit
   | ShowMsg !T.Text
@@ -149,6 +162,25 @@ data AppEvent
   | SendShield
   | StartSync
   | TreeSync
+  | ShowFIATBalance
+  | DisplayFIATBalance Double Double
+  | CloseFIATBalance
+  | ViewingKeysClicked
+  | PrepareViewingKey !VkTypeDef !(Maybe (Entity ZcashAccount))
+  | ShowViewingKey !VkTypeDef !T.Text
+  | CopyViewingKey !T.Text !T.Text
+  | CloseShowVK
+  | DisplayPaymentURIForm !T.Text
+  | ClosePaymentURIForm
+  | PrepareURIString
+  | CloseShowURIOverlay
+  | ShowURIOverlay  !(Maybe URIQrCode) !T.Text
+  | QRImageLoaded 
+  | CopyURIString !T.Text
+  | DisplayPayUsingURI
+  | ClosePayUsingURI
+  | ProcIfValidURI
+  | PreparePaymentURIForm
   deriving (Eq, Show)
 
 data AppModel = AppModel
@@ -208,6 +240,20 @@ data AppModel = AppModel
   , _tBalanceValid :: !Bool
   , _sBalance :: !Integer
   , _sBalanceValid :: !Bool
+  , _displayFIATBalance :: !Bool
+  , _zPrice :: !Double
+  , _aBal :: !Double
+  , _viewingKeyPopup :: !Bool
+  , _viewingKeyDisplay :: !Bool
+  , _vkTypeName :: !T.Text
+  , _vkData :: !T.Text
+  , _paymentURIDisplay :: !Bool
+  , _showURIDisplay :: !Bool
+  , _usepmtURIOverlay :: !Bool
+  , _uriString :: !T.Text
+  , _uriAddr :: !T.Text
+  , _uriQRImage :: !(Maybe URIQrCode)
+  , _uriQRInProgress :: !Bool
   } deriving (Eq, Show)
 
 makeLenses ''AppModel
@@ -221,6 +267,18 @@ remixHourglassFill = toGlyph 0xF338
 remixIcon :: T.Text -> WidgetNode s e
 remixIcon i = label i `styleBasic` [textFont "Remix", textMiddle]
 
+getURIQRWidth :: Maybe URIQrCode -> Int
+getURIQRWidth qr = 
+  case qr of 
+    Nothing -> 0
+    Just qr -> round (uriWidth qr)
+
+getURIQRHeight :: Maybe URIQrCode -> Int
+getURIQRHeight qr = 
+  case qr of 
+    Nothing -> 0
+    Just qr -> round (uriHeight qr)
+
 buildUI ::
      WidgetEnv AppModel AppEvent -> AppModel -> WidgetNode AppModel AppEvent
 buildUI wenv model = widgetTree
@@ -259,6 +317,12 @@ buildUI wenv model = widgetTree
           updateABAddress
         , shieldOverlay `nodeVisible` model ^. shieldZec
         , deShieldOverlay `nodeVisible` model ^. deShieldZec
+        , dfBalOverlay `nodeVisible` model ^. displayFIATBalance
+        , showVKOverlay `nodeVisible` model ^. viewingKeyDisplay
+        , paymentURIOverlay `nodeVisible` model ^. paymentURIDisplay
+        , showURIInProgress `nodeVisible` model ^. uriQRInProgress
+        , showURIOverlay `nodeVisible` model ^. showURIDisplay
+        , pmtUsingURIOverlay `nodeVisible` model ^. usepmtURIOverlay
         , msgAdrBookOverlay `nodeVisible` isJust (model ^. msgAB)
         ]
     mainWindow =
@@ -328,6 +392,35 @@ buildUI wenv model = widgetTree
              [bgColor white, borderB 1 gray, padding 3]
            , box_ [alignLeft, onClick ShowDeShield] (label "De-Shield ZEC") `styleBasic`
              [bgColor white, borderB 1 gray, padding 3]
+           , box_
+               [alignLeft]
+               (vstack
+                  [ box_
+                      [alignLeft, onClick ViewingKeysClicked]
+                      (hstack
+                         [ label "Viewing Keys"
+                         , filler
+                         , widgetIf (not $ model ^. viewingKeyPopup) $
+                           remixIcon remixMenuUnfoldFill
+                         , widgetIf (model ^. viewingKeyPopup) $
+                           remixIcon remixMenuFoldFill
+                         ])
+                  , widgetIf (model ^. viewingKeyPopup) $
+                    animSlideIn viewingKeysBox
+                  ]) `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
+           , box_
+               [alignLeft, onClick ShowFIATBalance]
+               (label
+                  ("Balance in " <>
+                   T.toUpper (c_currencyCode (model ^. configuration)))) `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
+           , box_ [alignLeft, onClick PreparePaymentURIForm] (label "Create URI") `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
+           , box_
+               [alignLeft, onClick DisplayPayUsingURI]
+               (label "Pay using URI") `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
            ]) `styleBasic`
       [bgColor btnColor, padding 3]
     newBox =
@@ -347,6 +440,31 @@ buildUI wenv model = widgetTree
                (hstack [label "Wallet", filler]) `styleBasic`
              [bgColor white, borderB 1 gray, padding 3]
            ])
+    viewingKeysBox =
+      box_
+        [alignMiddle]
+        (vstack
+           [ box_
+               [ alignLeft
+               , onClick
+                   (PrepareViewingKey
+                      VkFull
+                      currentAccount
+                   )
+               ]
+               (hstack [label "Full VK", filler]) `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
+           , box_
+               [ alignLeft
+               , onClick
+                  (PrepareViewingKey
+                      VkIncoming
+                      currentAccount
+                  )
+               ]
+               (hstack [label "Incoming VK", filler]) `styleBasic`
+             [bgColor white, borderB 1 gray, padding 3]
+           ])
     walletButton =
       hstack
         [ label "Wallet: " `styleBasic` [textFont "Bold", textColor white]
@@ -993,6 +1111,49 @@ buildUI wenv model = widgetTree
         , label_ (txtWrapN (fromMaybe "" (model ^. msgAB)) 64) [multiline]
         , filler
         ]
+    dfBalOverlay =
+      alert CloseFIATBalance $
+      vstack
+        [ box_
+            []
+            (label
+               ("Account Balance in " <>
+                (T.toUpper (c_currencyCode (model ^. configuration)))) `styleBasic`
+             [textFont "Bold", textSize 12, textColor white]) `styleBasic`
+          [bgColor btnColor, radius 2, padding 3]
+        , filler
+        , (label
+             ("1 ZEC = " <>
+              (T.pack (printf "%.2f" (model ^. zPrice))) <>
+              " " <> (T.toUpper (c_currencyCode (model ^. configuration))))) `styleBasic`
+          []
+        , filler
+        , (label
+             ((T.pack (printf "%.8f" (model ^. aBal)) <>
+               " ZEC = " <>
+               (T.pack (printf "%.2f" ((model ^. zPrice) * (model ^. aBal)))) <>
+               " " <> (T.toUpper (c_currencyCode (model ^. configuration)))))) `styleBasic`
+          []
+        ]
+    showVKOverlay =
+      alert CloseShowVK $
+      vstack
+        [ box_
+            []
+            (label ((model ^. vkTypeName) <> " Viewing Key") `styleBasic`
+             [textFont "Bold", textColor white, textSize 12, padding 3]) `styleBasic`
+          [bgColor btnColor, radius 2, padding 3]
+        , spacer
+        , hstack
+            [filler, label_ (txtWrapN (model ^. vkData) 64) [multiline], filler]
+        , spacer
+        , hstack
+            [ filler
+            , button "Copy to Clipboard" $
+              CopyViewingKey (model ^. vkTypeName) (model ^. vkData)
+            , filler
+            ]
+        ]
     shieldOverlay =
       box
         (vstack
@@ -1108,8 +1269,168 @@ buildUI wenv model = widgetTree
            , filler
            ]) `styleBasic`
       [bgColor (white & L.a .~ 0.5)]
-
-notImplemented = NotImplemented
+    --
+    paymentURIOverlay =
+      box
+        (vstack  
+          [ filler 
+          , hstack 
+              [ filler 
+              , box_ 
+                  []
+                  (vstack
+                    [ box_
+                        []
+                        (label "Create a Payment URI" `styleBasic`
+                         [textFont "Bold", textColor white, textSize 10, padding 3]) `styleBasic`
+                      [bgColor btnColor, radius 2, padding 3]
+                    , spacer
+                    , hstack
+                        [ filler
+                        , label "Current Address:" `styleBasic` [textFont "Bold"]
+                        , spacer
+                        , label_ (txtWrapN (model ^. uriAddr) 64) [multiline]
+                        , filler
+                        ]
+                    , spacer
+                    , hstack
+                        [ label "Amount : " `styleBasic` [textFont "Bold"]
+                        , numericField_ sendAmount
+                          [ decimals 8 ]
+                            `nodeKey` "floatInput"
+                            `styleBasic`
+                               [ width 150
+                               , styleIf (model ^. sendAmount <= 0.0) (textColor red)
+                               ]
+                        ]
+                    , spacer
+                    , hstack
+                        [ label "Memo: "  `styleBasic` [textFont "Bold"]
+                        , spacer
+                        , textField_ sendMemo [] `styleBasic` [width 300]
+                        ]
+                    , spacer
+                    , hstack
+                        [ filler
+                        , mainButton "Create URI" PrepareURIString `nodeEnabled`
+                              (model ^. sendAmount > 0.0)
+                        , spacer 
+                        , button "Cancel" ClosePaymentURIForm
+                        , filler
+                        ]
+                    ]) `styleBasic`
+                 [radius 4, border 2 btnColor, bgColor white, padding 4] 
+              , filler     
+              ]
+          , filler 
+          ]) `styleBasic`
+        [bgColor (white & L.a .~ 0.5)]
+    -- 
+    showURIInProgress =
+      box 
+        (vstack  
+          [ filler 
+          , hstack 
+              [ filler 
+              , label "Processing Payment URI, it will take a moment ....." 
+                  `styleBasic` [textFont "Bold", textSize 14]
+              , filler 
+              ]
+          , filler 
+          ])  `styleBasic`
+        [bgColor (white & L.a .~ 0.5)]
+    --    
+    showURIOverlay =
+      box 
+        (vstack
+          [ filler 
+          , hstack 
+              [ filler 
+              , box_ 
+                  []
+                  (vstack 
+                      [ box_
+                         [alignMiddle]
+                         (label "Payment URI" `styleBasic`
+                          [textFont "Bold", textColor white, textSize 11, padding 3]) `styleBasic`
+                        [bgColor btnColor, radius 2, padding 3]
+                      , spacer
+                      , hstack
+                          [filler, label_ (txtWrapN (model ^. uriString ) 64) [multiline], filler]
+                      , spacer
+                      , hstack
+                          [ filler
+                          , box_
+                              [alignMiddle]
+                              (case model ^. uriQRImage of
+                                Just img ->  imageMem_ "URIQRCode" (uriBytes img) (Size (uriWidth img) (uriHeight img) ) 
+                                               [fitWidth]
+                                Nothing  ->  image_
+                                              (T.pack $ (model ^. home) </> "Zenith/assets/cracked_qr.png")
+                                              [fitHeight] )
+                               `styleBasic` [ bgColor white 
+                                            , height 120
+                                            , width 120
+                                            ]
+                          , filler
+                          ] 
+                      , spacer
+                      , hstack
+                          [ filler
+                          , button "Copy to Clipboard" $
+                            CopyURIString (model ^. uriString)
+                          , spacer 
+                          , button "Cancel"  CloseShowURIOverlay  
+                          , filler
+                          ]
+                      ]) `styleBasic`
+                 [radius 4, border 2 btnColor, bgColor white, padding 4] 
+              , filler     
+              ]
+          , filler 
+          ] ) `styleBasic`
+        [bgColor (white & L.a .~ 0.5)]
+    --
+    pmtUsingURIOverlay =
+      box
+        (vstack
+           [ filler
+           , hstack
+               [ filler
+               , box_
+                   []
+                   (vstack
+                      [ box_
+                          [alignMiddle]
+                          (label "Pay using URI" `styleBasic`
+                           [textColor white, textFont "Bold", textSize 12]) `styleBasic`
+                        [bgColor btnColor]
+                      , separatorLine `styleBasic` [fgColor btnColor]
+                      , spacer
+                      , hstack
+                          [ label "URI :" `styleBasic`
+                            [width 30, textFont "Bold"]
+                          , spacer
+                          , textArea uriString `styleBasic`
+                            [width 170, height 30]
+                          ]
+                      , spacer
+                      , box_
+                          [alignMiddle]
+                          (hstack
+                             [ spacer
+                             , button "Cancel" ClosePayUsingURI
+                             , spacer
+                             , mainButton "Process" ProcIfValidURI
+                             , spacer
+                             ])
+                      ]) `styleBasic`
+                 [radius 4, border 2 btnColor, bgColor white, padding 4]
+               , filler
+               ]
+           , filler
+           ]) `styleBasic`
+      [bgColor (white & L.a .~ 0.5)]
 
 generateQRCodes :: Config -> IO ()
 generateQRCodes config = do
@@ -1233,6 +1554,14 @@ handleEvent wenv node model evt =
         False
       ]
     ConfirmCancel -> [Model $ model & confirmTitle .~ Nothing & mainInput .~ ""]
+    ViewingKeysClicked ->
+      [Model $ model & viewingKeyPopup .~ not (model ^. viewingKeyPopup)]
+    NewAddress vk ->
+      [ Model $
+        model & confirmTitle ?~ "New Address" & confirmCancel .~ "Cancel" &
+        menuPopup .~
+        False
+      ]
     ShowSeed -> [Model $ model & showSeed .~ True & menuPopup .~ False]
     ShowSend ->
       [ Model $
@@ -1455,6 +1784,7 @@ handleEvent wenv node model evt =
         model & amountValid .~
         (i < (fromIntegral (model ^. balance) / 100000000.0))
       ]
+    -- 
     ShowTxId tx -> [Model $ model & showId ?~ tx & modalMsg .~ Nothing]
     -- |
     -- | Address Book Events
@@ -1508,6 +1838,16 @@ handleEvent wenv node model evt =
       , setClipboardData $ ClipboardText a
       , Event $ ShowMessage "Address copied!!"
       ]
+    CopyViewingKey t v ->
+      [ setClipboardData ClipboardEmpty
+      , setClipboardData $ ClipboardText v
+      , Event $ ShowMessage (t <> " viewing key copied!!")
+      ]
+    CopyURIString u ->
+      [ setClipboardData ClipboardEmpty
+      , setClipboardData $ ClipboardText u
+      , Event $ ShowMessage "URI string copied to clipboard!!"
+      ]
     DeleteABEntry a ->
       [ Task $ deleteAdrBook (model ^. configuration) a
       , Model $
@@ -1523,6 +1863,124 @@ handleEvent wenv node model evt =
         model & msgAB ?~ "Function not implemented..." & menuPopup .~ False
       ]
     CloseMsgAB -> [Model $ model & msgAB .~ Nothing & inError .~ False]
+    CloseShowVK ->
+      [ Model $
+        model & vkTypeName .~ "" & vkData .~ "" & viewingKeyDisplay .~ False
+      ]
+    --
+    -- Show Balance in FIAT
+    --
+    DisplayFIATBalance zpr abal ->
+      [ Model $
+        model & zPrice .~ zpr & aBal .~ abal & displayFIATBalance .~ True &
+        menuPopup .~
+        False
+      ]
+    ShowFIATBalance ->
+      if model ^. network == MainNet
+        then [ Task $ sfBalance (model ^. configuration) ]
+        else [ Model $ model & zPrice .~ 0.0 & aBal .~ 0.0
+             , Event $ ShowError "Balance conversion not available for TestNet"
+             ]
+    CloseFIATBalance -> [Model $ model & displayFIATBalance .~ False]
+    --
+    -- Prepare Viewing Keys
+    --
+    PrepareViewingKey vkType cAcc ->
+      case vkType of
+        VkFull -> [ Task $ getFullVk (model ^. network) cAcc  ]
+        VkIncoming -> [ Task $ getIncomingVk (model ^. network) cAcc  ]
+    --
+    -- Show Viewing Keys
+    --
+    ShowViewingKey vkType vkText ->
+      case vkType of
+        VkFull -> [ Model $
+                    model & vkTypeName .~ "Full"
+                          & vkData .~ vkText
+                          & viewingKeyDisplay .~ True
+                          & menuPopup .~ False
+                  ]
+        VkIncoming -> [ Model $
+                        model & vkTypeName .~ "Incoming"
+                              & vkData .~ vkText
+                              & viewingKeyDisplay .~ True
+                              & menuPopup .~ False
+                      ]
+    --
+    -- Display PaymentURI Form
+    --
+    PreparePaymentURIForm ->
+      [ Task $ getCurrentAddress currentAddress ]
+    -- 
+    DisplayPaymentURIForm ua->
+      [ Model $
+        model & uriString .~ ""
+              & uriAddr .~ ua
+              & amountValid .~ False
+              & sendAmount .~ 0.0
+              & sendMemo .~ ""
+              & paymentURIDisplay .~ True
+              & menuPopup .~ False
+      ]
+    ClosePaymentURIForm -> [Model $ model & paymentURIDisplay .~ False]
+    --
+    -- Generate URI 
+    --
+    PrepareURIString -> [ Task $ genURIString (model ^. uriAddr) (model ^. sendAmount) (model ^. sendMemo)
+                        , Model $ model & uriQRInProgress .~ True 
+                        ]
+    ShowURIOverlay qr uStr ->
+      [ Model $
+        model & uriString .~ uStr
+              & uriQRImage .~ qr
+              & uriQRInProgress .~ True
+              & paymentURIDisplay .~ False
+              & showURIDisplay .~ True
+              & uriQRInProgress .~ False
+      ]
+    CloseShowURIOverlay -> [ Model $ model & showURIDisplay .~ False & uriString .~ "" & uriQRInProgress .~ False & uriQRImage .~ Nothing]
+    QRImageLoaded -> [ Model $ model & uriQRInProgress .~ False ]
+    --
+    -- Display Pay using URI Form
+    --
+    DisplayPayUsingURI ->
+      [Model $ model & usepmtURIOverlay .~ True & menuPopup .~ False]
+    ClosePayUsingURI -> [Model $ model & usepmtURIOverlay .~ False]
+    ProcIfValidURI -> do
+      let zp = parseZcashPayment $ T.unpack (model ^. uriString)
+      case zp of
+        Right p -> do
+          case uriAmount p of
+            Just a ->
+              [ Model $
+                model & usepmtURIOverlay .~ False & openSend .~ True &
+                privacyChoice .~
+                Full &
+                recipientValid .~
+                False &
+                sendRecipient .~
+                T.pack (uriAddress p) &
+                sendAmount .~
+                realToFrac a &
+                sendMemo .~ (uriMemo p)
+              , Event $ ClosePaymentURIForm
+              ]
+            Nothing ->
+              [ Model $
+                model & usepmtURIOverlay .~ False & openSend .~ False &
+                uriString .~
+                ""
+              , Event $ ShowError "Invalid URI"
+              ]
+        Left e ->
+          [ Model $
+            model & usepmtURIOverlay .~ False & openSend .~ False & uriString .~
+            ""
+          , Event $ ShowError "Invalid URI"
+          ]
+    --
+    --
     ShowShield ->
       if model ^. tBalance > 0
         then [Model $ model & shieldZec .~ True & menuPopup .~ False]
@@ -1680,6 +2138,90 @@ handleEvent wenv node model evt =
       pool <- runNoLoggingT $ initPool $ c_dbPath config
       res <- liftIO $ updateAdrsInAdrBook pool d a a
       return $ ShowMessage "Address Book entry updated!!"
+    --
+    dbal :: Integer -> Double
+    dbal a = fromIntegral a
+    -- 
+    sfBalance :: Config -> IO AppEvent
+    sfBalance config = do
+      zpr <- liftIO $ getZcashPrice $ c_currencyCode config
+      case zpr of
+        Just zp -> do
+          let zbal = (dbal (model ^. balance)) / 100000000
+          return $ DisplayFIATBalance zp zbal
+        Nothing ->
+          return $
+          ShowMessage
+            ("Currency not supported [" <> c_currencyCode config <> "]")
+    --
+    procIfValidURI :: T.Text -> IO AppEvent
+    procIfValidURI ustr = do
+      return $ ShowSend
+    --
+    -- Get Full Viewing Key  
+    --
+    getFullVk :: ZcashNet -> Maybe (Entity ZcashAccount) ->  IO AppEvent
+    getFullVk n cAcc = do
+      case cAcc of
+        Nothing -> return $ ShowMessage "Viewing Key Error: No account selected!"
+        Just acc -> do
+            let osk = getOrchSK $ zcashAccountOrchSpendKey $ entityVal acc
+            let ssk = getSapSK $ zcashAccountSapSpendKey $ entityVal acc
+            let tsk = getTranSK $ zcashAccountTPrivateKey $ entityVal acc
+            fvk <- deriveUfvk n osk ssk tsk
+            return $ ShowViewingKey VkFull fvk
+    --
+    -- Get Incoming Viewing Key  
+    --
+    getIncomingVk :: ZcashNet -> Maybe (Entity ZcashAccount) ->  IO AppEvent
+    getIncomingVk n cAcc = do
+      case cAcc of
+        Nothing -> return $ ShowMessage "Viewing Key Error: No account selected!"
+        Just acc -> do
+            let osk = getOrchSK $ zcashAccountOrchSpendKey $ entityVal acc
+            let ssk = getSapSK $ zcashAccountSapSpendKey $ entityVal acc
+            let tsk = getTranSK $ zcashAccountTPrivateKey $ entityVal acc
+            ivk <- deriveUivk n osk ssk tsk
+            return $ ShowViewingKey VkIncoming ivk
+    --
+    -- Get curret zcash address 
+    --   
+    getCurrentAddress :: Maybe (Entity WalletAddress) -> IO AppEvent
+    getCurrentAddress  a = do
+      let ua = case model ^. selPool of
+                OrchardPool -> maybe "None" (getUA . walletAddressUAddress . entityVal) a
+                SaplingPool -> fromMaybe "None" $ (getSaplingFromUA . E.encodeUtf8 . getUA . walletAddressUAddress . entityVal) =<< a
+                SproutPool -> "None"
+                TransparentPool -> maybe "None" (encodeTransparentReceiver (model ^. network)) $
+                  t_rec =<< (isValidUnifiedAddress . E.encodeUtf8 . getUA . walletAddressUAddress . entityVal) =<< a
+      return $ DisplayPaymentURIForm ua
+    --
+    -- Generate a QR code for a String and save it as an PNG image
+    --
+    genURIStringQR :: Int -> T.Text -> Maybe URIQrCode
+    genURIStringQR scaleFactor uriStr = do
+      let qrOptions = defaultQRCodeOptions L
+      case encodeText qrOptions Utf8WithoutECI uriStr of
+        Nothing -> Nothing 
+        Just qrCode -> do
+            let qri = promoteImage (toImage 4 scaleFactor qrCode) 
+            let qrw = fromIntegral $ imageWidth qri
+            let qrh = fromIntegral $ imageHeight qri
+            let qrb = BS.pack $ 
+                      pixelFold (\bs _ _ (PixelRGBA8 i j k l) -> bs <> [i, j, k, l])
+                      []
+                      qri
+            Just URIQrCode { uriBytes=qrb, uriWidth=qrw, uriHeight=qrh }
+    --
+    -- Gen URI String
+    --   
+    genURIString :: T.Text ->  Float -> T.Text -> IO AppEvent
+    genURIString addr mAmt mMemo = do
+      let mM = case mMemo of
+                  "" -> Nothing
+                  _  -> Just (T.unpack mMemo)
+      let uriSt = createZip321 (T.unpack addr) (Just (realToFrac mAmt)) mM
+      return $ ShowURIOverlay (genURIStringQR 3 (T.pack uriSt)) (T.pack uriSt)
 
 scanZebra ::
      T.Text
@@ -2024,6 +2566,20 @@ runZenithGUI config = do
                           False
                           shieldBal
                           False
+                          False
+                          0.0
+                          0.0
+                          False
+                          False
+                          ""
+                          ""
+                          False
+                          False
+                          False
+                          ""
+                          ""
+                          Nothing
+                          False
                   startApp model handleEvent buildUI (params hD)
         Left _e -> print "Zebra not available"
   where

src/Zenith/RPC.hs

@@ -916,7 +916,7 @@ scanZebra dbPath zHost zPort net = do
               updateCommitmentTrees pool zHost zPort $ ZcashNetDB net
             runNoLoggingT $
               mapM_
-                (syncWallet (Config dbPath zHost zPort "user" "pwd" 8080))
+                (syncWallet (Config dbPath zHost zPort "user" "pwd" 8080 "usd"))
                 wals
             _ <- completeSync pool Successful
             return ()

src/Zenith/Scanner.hs

@@ -10,6 +10,7 @@ import Control.Monad.Logger
   ( NoLoggingT
   , logErrorN
   , logInfoN
+  , runFileLoggingT
   , runNoLoggingT
   , runStderrLoggingT
   )
@@ -58,6 +59,7 @@ import Zenith.Types
   , ZcashNetDB(..)
   , ZenithStatus(..)
   )
+import Zenith.Types (Config(..), HexStringDB(..), ZcashNetDB(..))
 import Zenith.Utils (jsonNumber)
 
 -- | Function to scan the Zcash blockchain through the Zebra node and populate the Zenith database

src/Zenith/Types.hs

@@ -112,6 +112,7 @@ data Config = Config
   , c_zenithUser :: !BS.ByteString
   , c_zenithPwd :: !BS.ByteString
   , c_zenithPort :: !Int
+  , c_currencyCode :: !T.Text
   } deriving (Eq, Prelude.Show)
 
 data ZcashPool
@@ -507,3 +508,20 @@ encodeHexText' t =
   if T.length t > 0
     then C.unpack . B64.encode $ E.encodeUtf8 t
     else C.unpack . B64.encode $ E.encodeUtf8 "Sent from Zenith"
+
+-- | Define a data structure for the parsed components
+data ZcashPaymentURI = ZcashPaymentURI
+  { uriAddress :: String
+  , uriAmount :: Maybe Double
+  , uriMemo :: T.Text
+  , uriLabel :: Maybe String
+  , uriMessage :: Maybe String
+  } deriving (Show, Eq)
+
+-- | Define a data structure for the URI QR image
+data URIQrCode = URIQrCode 
+  {
+    uriBytes  :: BS.ByteString -- Image as ByteString
+  , uriWidth  :: Double           -- Number of columns in QR Image
+  , uriHeight :: Double           -- Number of rows in a QR Image
+  }  deriving (Show, Eq)

src/Zenith/Utils.hs

@@ -2,16 +2,31 @@
 
 module Zenith.Utils where
 
+import Control.Exception (SomeException, try)
+import Control.Monad (when)
 import Data.Aeson
+import qualified Data.Aeson.Key as K
+import qualified Data.Aeson.KeyMap as KM
+import Data.Aeson.Types (parseMaybe)
+import qualified Data.ByteString as BS
+import qualified Data.ByteString.Base64 as B64
+import qualified Data.ByteString.Char8 as BC
+import qualified Data.ByteString.Lazy as B
+import qualified Data.ByteString.Lazy.Char8 as BL
 import Data.Char (isAlphaNum, isSpace)
 import Data.Functor (void)
 import Data.Maybe
 import Data.Ord (clamp)
-import Data.Scientific (Scientific(..), scientific)
+import Data.Scientific (Scientific(..), scientific, Scientific, toRealFloat)
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
+--import qualified Data.Text.Encoding as TE
+import Network.HTTP.Simple
+import Network.URI (escapeURIString, isUnreserved)
 import System.Directory
 import System.Process (createProcess_, shell)
+import Text.Printf (printf)
+import Text.Read (readMaybe)
 import Text.Regex.Posix
 import ZcashHaskell.Orchard
   ( encodeUnifiedAddress
@@ -25,10 +40,12 @@ import ZcashHaskell.Transparent
   )
 import ZcashHaskell.Types
   ( ExchangeAddress(..)
+  , ExchangeAddress(..)
   , SaplingAddress(..)
   , TransparentAddress(..)
   , UnifiedAddress(..)
   , ValidAddress(..)
+  , ValidAddress(..)
   , ZcashNet(..)
   )
 import ZcashHaskell.Utils (makeZebraCall)
@@ -37,6 +54,7 @@ import Zenith.Types
   , PrivacyPolicy(..)
   , UnifiedAddressDB(..)
   , ZcashAddress(..)
+  , ZcashPaymentURI(..)
   , ZcashPool(..)
   )
 
@@ -52,7 +70,7 @@ displayZec s
   | abs s < 100000000 = show (fromIntegral s / 100000) ++ " mZEC"
   | otherwise = show (fromIntegral s / 100000000) ++ " ZEC "
 
--- | Helper function to display small amounts of ZEC
+-- | Helper function to display small amounts of TAZ
 displayTaz :: Integer -> String
 displayTaz s
   | abs s < 100 = show s ++ " tazs"
@@ -248,3 +266,91 @@ getChainTip zHost zPort = do
   case r of
     Left e1 -> pure 0
     Right i -> pure i
+
+-- Function to fetch Zcash price from CoinGecko
+getZcashPrice :: T.Text -> IO (Maybe Double)
+getZcashPrice currency = do
+  let url =
+        "https://api.coingecko.com/api/v3/simple/price?ids=zcash&vs_currencies=" <>
+        T.unpack currency
+  response <- httpJSONEither (parseRequest_ url)
+  case getResponseBody response of
+    Right (Object obj)
+        -- Extract "zcash" object
+     -> do
+      case KM.lookup "zcash" obj of
+        Just (Object zcashObj)
+            -- Extract the currency price
+         ->
+          case KM.lookup (K.fromText (T.toLower currency)) zcashObj of
+            Just (Number price) -> return (Just (toRealFloat price))
+            _ -> return Nothing
+        _ -> return Nothing
+    _ -> return Nothing
+
+-- Parse memo result to convert it to a ByteString
+processEither :: Either String BC.ByteString -> BC.ByteString
+processEither (Right bs) = bs
+processEither (Left e) = BC.pack e -- Returns the error message
+
+-- Parse the query string into key-value pairs 
+parseQuery :: String -> [(String, String)]
+parseQuery query = map (breakOn '=') (splitOn '&' query)
+  where
+    splitOn :: Char -> String -> [String]
+    splitOn _ [] = [""]
+    splitOn delim (c:cs)
+      | c == delim = "" : rest
+      | otherwise = (c : head rest) : tail rest
+      where
+        rest = splitOn delim cs
+    breakOn :: Char -> String -> (String, String)
+    breakOn delim str = (key, drop 1 value)
+      where
+        (key, value) = span (/= delim) str
+
+-- Parse a ZIP-321 encoded string into a ZcashPayment structure
+parseZcashPayment :: String -> Either String ZcashPaymentURI
+parseZcashPayment input
+  | not (T.isPrefixOf "zcash:"  (T.pack input)) = Left "Invalid scheme: must start with 'zcash:'"
+  | otherwise =
+      let (addrPart, queryPart) = break (== '?') (drop 6 input)
+          queryParams = parseQuery (drop 1 queryPart)
+       in Right ZcashPaymentURI
+            { uriAddress = addrPart
+            , uriAmount  = lookup "amount" queryParams >>= readMaybe
+            , uriMemo    = case lookup "memo" queryParams of
+                            Just m -> T.pack ( BC.unpack (processEither $ decodeBase64Unpadded (BC.pack m)  ) )
+                            _ -> ""
+            , uriLabel   = lookup "label" queryParams
+            , uriMessage = lookup "message" queryParams
+            }
+
+-- Function to pad a base64 string if it's not a multiple of 4
+padBase64 :: BC.ByteString -> BC.ByteString
+padBase64 bs = bs <> BC.replicate paddingLength '='
+  where
+    paddingLength = (4 - BC.length bs `mod` 4) `mod` 4
+
+-- Function to decode a base64 un-padded string
+decodeBase64Unpadded :: BC.ByteString -> Either String BC.ByteString
+decodeBase64Unpadded = B64.decode . padBase64
+
+-- Function to encode memo as un-padded Base64
+encodeBase64Memo :: String -> String
+encodeBase64Memo = BC.unpack . BC.takeWhile (/= '=') . B64.encode . BC.pack
+
+-- Function to drop trailing zeros 
+dropTrailingZeros :: String -> String
+dropTrailingZeros str =
+    let withoutZeros = reverse (dropWhile (== '0') (reverse str))
+    in if last withoutZeros == '.' 
+           then withoutZeros ++ "0"  -- Ensure at least one decimal place
+           else withoutZeros
+
+-- Function to create a ZIP-321 URI
+createZip321 :: String -> Maybe Double -> Maybe String -> String
+createZip321 address mAmount mMemo =
+  "zcash:" ++ address
+    ++ maybe "" (\amount -> "?amount=" ++ dropTrailingZeros (printf "%.8f" amount) ) mAmount
+    ++ maybe "" (\memo -> "&memo=" ++ escapeURIString isUnreserved (encodeBase64Memo memo)) mMemo

test/ServerSpec.hs

@@ -58,7 +58,16 @@ main = do
   zebraPort <- require config "zebraPort"
   zebraHost <- require config "zebraHost"
   nodePort <- require config "nodePort"
-  let myConfig = Config dbFilePath zebraHost zebraPort nodeUser nodePwd nodePort
+  currencyCode <- require config "currencyCode"
+  let myConfig =
+        Config
+          dbFilePath
+          zebraHost
+          zebraPort
+          nodeUser
+          nodePwd
+          nodePort
+          currencyCode
   hspec $ do
     describe "RPC methods" $ do
       beforeAll_ (startAPI myConfig) $ do

test/Spec.hs

@@ -2,13 +2,14 @@
 
 import Codec.Borsh
 import Control.Monad (when)
-import Control.Monad.Logger (runFileLoggingT, runNoLoggingT)
+import Control.Monad.Logger (runNoLoggingT, runNoLoggingT)
 import Data.Aeson
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Lazy as LBS
 import Data.HexString
 import Data.List (foldl')
 import Data.Maybe (fromJust)
+import qualified Data.Text as T
 import qualified Data.Text.Encoding as E
 import Database.Persist
 import Database.Persist.Sqlite
@@ -69,6 +70,7 @@ import Zenith.Core
 import Zenith.DB
 import Zenith.Tree
 import Zenith.Types
+import Zenith.Utils
 
 main :: IO ()
 main = do
@@ -643,8 +645,7 @@ main = do
               case ix of
                 Nothing -> assertFailure "couldn't find index at block"
                 Just i -> do
-                  updatedTree <-
-                    runFileLoggingT "test.log" $ truncateTree oTree i
+                  updatedTree <- runNoLoggingT $ truncateTree oTree i
                   let finalAnchor =
                         getOrchardTreeAnchor $
                         OrchardCommitmentTree $ ztiOrchard zebraTreesIn
@@ -737,7 +738,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -763,7 +764,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -787,7 +788,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -815,7 +816,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -847,7 +848,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -873,7 +874,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -897,7 +898,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -926,7 +927,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -957,7 +958,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -983,7 +984,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -1007,7 +1008,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -1034,7 +1035,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -1061,7 +1062,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -1086,7 +1087,7 @@ main = do
             Just ua -> do
               pool <- runNoLoggingT $ initPool "/home/rav/Zenith/zenith.db"
               tx <-
-                runFileLoggingT "zenith.log" $
+                runNoLoggingT $
                 prepareTxV2
                   pool
                   "localhost"
@@ -1103,3 +1104,45 @@ main = do
               case tx of
                 Left e -> assertFailure $ show e
                 Right h -> h `shouldNotBe` hexString "deadbeef"
+    describe "Call CoinGecko to get ZEC price" $ do
+      it "Testing for USD " $ do
+        price <- getZcashPrice $ T.pack "usd"
+        case price of
+          Just p -> p `shouldNotBe` 0.0
+          Nothing -> assertFailure "Failed to get ZEC price"
+    describe "Parse an URI payment string (all fields filled) " $ do
+      it ("Parsing URI -> " ++ "zcash:ztestsapling10yy2ex5....") $ do
+        let zcashURI2 =
+              "zcash:ztestsapling10yy2ex5dcqkclhc7z7yrnjq2z6feyjad56ptwlfgmy77dmaqqrl9gyhprdx59qgmsnyfska2kez?amount=100&memo=SGVsbG8sIFdvcmxkIQ==&message=Test"
+        case parseZcashPayment zcashURI2 of
+          Right p -> do
+            print p
+            (uriAmount p) `shouldBe` Just 100.0
+          Left e -> assertFailure $ "Error: " ++ e
+    describe
+      "Parse an URI payment string (just address and amount fields provided) " $ do
+      it ("Parsing URI -> " ++ "zcash:ztestsapling10yy2ex5....") $ do
+        let zcashURI3 =
+              "zcash:ztestsapling10yy2ex5dcqkclhc7z7yrnjq2z6feyjad56ptwlfgmy77dmaqqrl9gyhprdx59qgmsnyfska2kez?amount=100"
+        case parseZcashPayment zcashURI3 of
+          Right p -> do
+            print p
+            (uriAmount p) `shouldBe` Just 100.0
+          Left e -> assertFailure $ "Error: " ++ e
+    describe "Parse an URI payment string (invalid URI provided) " $ do
+      it ("Parsing URI -> " ++ "zcash:ztestsapling10yy2ex5....") $ do
+        let zcashURI3 =
+              "z:ztestsapling10yy2ex5dcqkclhc7z7yrnjq2z6feyjad56ptwlfgmy77dmaqqrl9gyhprdx59qgmsnyfska2kez?amount=100"
+        case parseZcashPayment zcashURI3 of
+          Right p -> do
+            print p
+            (uriAmount p) `shouldBe` Just 100.0
+          Left e -> assertFailure $ "Error: " ++ e
+    describe "Create a ZIP-321 URI payment string " $ do
+      it "Creating an URI using a valid Zcash address, an amount, and a memo " $ do
+        let address = "ztestsapling10yy2ex5dcqkclhc7z7yrnjq2z6feyjad56ptwlfgmy77dmaqqrl9gyhprdx59qgmsnyfska2kez"
+        let amount = Just 1.2345
+        let memo = Just "This is a simple memo."
+        let uriString = createZip321 address amount memo 
+        print uriString 
+        uriString `shouldBe` "zcash:ztestsapling10yy2ex5dcqkclhc7z7yrnjq2z6feyjad56ptwlfgmy77dmaqqrl9gyhprdx59qgmsnyfska2kez?amount=1.2345&memo=VGhpcyBpcyBhIHNpbXBsZSBtZW1vLg"

zenith.cabal

@@ -96,6 +96,8 @@ library
     , vty-crossplatform
     , word-wrap
     , zcash-haskell
+    , unordered-containers
+    , network-uri
   --pkgconfig-depends: rustzcash_wrapper
   default-language: Haskell2010
 

zenith.cfg

@@ -1,5 +1,38 @@
+# 
+# Zenith Configuration File
+# 
+# -------------------------------------------------------------
+# nodeUser - 
+# -------------------------------------------------------------
 nodeUser = "user"
+# -------------------------------------------------------------
+# nodePwd -
 nodePwd = "superSecret"
-dbFilePath = "zenith.db"
+# -------------------------------------------------------------
+# dbFileName  - contains the SQLite database name used for
+#			    keeping all Zenith's data
+#               default = zenith.db 
+#
+dbFileName = "zenith.db"
+# -------------------------------------------------------------
+# zebraHost   - Zebra IP 
+#				Default - "127.0.0.1" 
 zebraHost = "127.0.0.1"
+# -------------------------------------------------------------
+# zebraPort   - Port used for access Zebra API endpoints
+#			    must be the same port configured for your 
+#				Zebra node
 zebraPort = 18232
+# -------------------------------------------------------------
+# currencyCode  - ISO 4217 currency code 
+#
+#  Example of currency codes are:
+#
+#      United States -> currencyCode = "usd"	
+#      Canada        -> currencyCode = "cnd"	
+#      Australia     -> currencyCode = "aud"
+#      Euro Region   -> currencyCode = "eur"	
+#      Great Britain -> currencyCode = "gbp"	
+#      Japan         -> currencyCode = "jpy"		
+#                 
+currencyCode = "usd"