-- Copyright 2022-2024 Vergara Technologies LLC
-- This file is part of Zcash-Haskell.
--
-- |
-- Module      :  ZcashHaskell.Keys
-- Copyright   :  2022-2024 Vergara Technologies
-- License     :  MIT
--
-- 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(..), ToBytes(..))

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

-- | Derive a cryptographic seed from the given seed phrase.
getWalletSeed :: Phrase -> Maybe Seed
getWalletSeed p =
  if BS.length (getBytes result) > 0
    then Just result
    else Nothing
  where
    result :: Seed
    result = (withPureBorshVarBuffer . rustWrapperGetSeed) p