zcash-haskell/src/ZcashHaskell/Orchard.hs

module ZcashHaskell.Orchard where

import C.Zcash
  ( rustWrapperIsUA
  , rustWrapperOrchardNoteDecode
  , rustWrapperUfvkDecode
  )
import qualified Data.ByteString as BS
import Foreign.Rust.Marshall.Variable
import ZcashHaskell.Types

-- | Check if given bytestring is a valid encoded unified address
isValidUnifiedAddress :: BS.ByteString -> Bool
isValidUnifiedAddress = rustWrapperIsUA

-- | Attempt to decode the given bytestring into a Unified Full Viewing Key
decodeUfvk :: BS.ByteString -> Maybe UnifiedFullViewingKey
decodeUfvk str =
  case net decodedKey of
    0 -> Nothing
    _ -> Just decodedKey
  where
    decodedKey = (withPureBorshVarBuffer . rustWrapperUfvkDecode) str

decryptOrchardAction ::
     OrchardAction -> UnifiedFullViewingKey -> Maybe OrchardDecodedAction
decryptOrchardAction encAction key =
  case a_value decodedAction of
    0 -> Nothing
    _ -> Just decodedAction
  where
    decodedAction =
      withPureBorshVarBuffer $
      rustWrapperOrchardNoteDecode (o_key key) encAction