zenith/src/Zenith/Core.hs

{-# LANGUAGE OverloadedStrings #-}

-- Core wallet functionality for Zenith
module Zenith.Core where

import Data.Aeson
import qualified Data.Text as T
import Database.Persist
import Database.Persist.Sqlite
import Network.HTTP.Client
import ZcashHaskell.Types
import ZcashHaskell.Utils
import Zenith.DB

-- * Database functions
-- | Returns the list of wallets available in the given database
checkWallets ::
     T.Text -- ^ The database name to check
  -> IO [Entity ZcashWallet]
checkWallets dbName = do
  runSqlite dbName $ do runMigration migrateAll
  runSqlite dbName $ selectList [ZcashWalletBirthdayHeight >. 0] []

-- * Zebra Node interaction
-- | Checks the status of the `zebrad` node
checkZebra ::
     Int -- ^ Port where `zebrad` is available 
  -> IO (Maybe ZebraGetInfo)
checkZebra port = do
  res <- makeZebraCall port "getinfo" []
  let body = responseBody (res :: Response (RpcResponse ZebraGetInfo))
  return $ result body

-- | Checks the status of the Zcash blockchain
checkBlockChain ::
     Int -- ^ Port where `zebrad` is available
  -> IO (Maybe ZebraGetBlockChainInfo)
checkBlockChain port = do
  let f = makeZebraCall port
  result <$> (responseBody <$> f "getblockchaininfo" [])

-- | Generic RPC call function
connectZebra ::
     FromJSON a => Int -> T.Text -> [Data.Aeson.Value] -> IO (Maybe a)
connectZebra port m params = do
  res <- makeZebraCall port m params
  let body = responseBody res
  return $ result body