{- Copyright 2022-2024 Vergara Technologies LLC

  This file is part of Zcash-Haskell.
 
  Zcash-Haskell is free software: you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by the Free
  Software Foundation, either version 3 of the License, or (at your option) any
  later version.
 
  Zcash-Haskell is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
  details.

  You should have received a copy of the GNU Lesser General Public License along with
  Zcash-Haskell. If not, see <https://www.gnu.org/licenses/>.
-}
-- |
-- Module      :  ZcashHaskell.Keys
-- Copyright   :  2022-2024 Vergara Technologies
-- License     :  LGPL-3
--
-- Maintainer  :  pitmutt@vergara.tech
-- Stability   :  experimental
-- Portability :  unknown
--
-- Functions to generate keys for the Zcash blockchain
--
module ZcashHaskell.Keys where

import C.Zcash (rustWrapperGenSeedPhrase, rustWrapperGetSeed)
import qualified Data.ByteString as BS
import qualified Data.Text as T
import Foreign.Rust.Marshall.Variable
  ( withBorshVarBuffer
  , withPureBorshVarBuffer
  )
import ZcashHaskell.Types (Phrase, Seed)

-- | Generate a random seed that can be used to generate private keys for shielded addresses and transparent addresses.
generateWalletSeedPhrase :: IO Phrase
generateWalletSeedPhrase = withBorshVarBuffer rustWrapperGenSeedPhrase

-- | Get 
getWalletSeed :: Phrase -> Maybe Seed
getWalletSeed p =
  if BS.length result > 0
    then Just result
    else Nothing
  where
    result :: Seed
    result = (withPureBorshVarBuffer . rustWrapperGetSeed) p