Add new `Scanner` module

src/Zenith/Scanner.hs

@@ -0,0 +1,22 @@
+module Zenith.Scanner where
+
+import Control.Monad (when)
+import qualified Data.Text as T
+import Zenith.Core (checkBlockChain)
+
+-- | Function to scan the Zcash blockchain through the Zebra node and populate the Zenith database
+scanZebra ::
+     Int -- ^ Starting block
+  -> T.Text -- ^ Host
+  -> Int -- ^ Port
+  -> T.Text -- ^ Path to database file
+  -> IO ()
+scanZebra b host port dbFilePath = do
+  bc <- checkBlockChain host port
+  case bc of
+    Nothing -> throwIO $ userError "Failed to determine blockchain status"
+    Just bStatus -> do
+      if b > zgb_blocks bStatus
+        then throwIO $ userError "Invalid starting block for scan"
+        else do
+          let bList = [b .. (zgb_blocks bStatus)]

zenith.cabal

@@ -32,6 +32,7 @@ library
     Zenith.Types
     Zenith.Utils
     Zenith.Zcashd
+    Zenith.Scanner
   hs-source-dirs:
     src
   build-depends: