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{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE FunctionalDependencies #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE DeriveDataTypeable #-}
module Network.RPC where
import Data.ByteString (ByteString)
import Data.Kind (Constraint)
import Data.Data
import Network.Socket
data MessageClass = Error | Query | Response
deriving (Eq,Ord,Enum,Bounded,Data,Show,Read)
class Envelope envelope where
type TransactionID envelope
type NodeId envelope
envelopePayload :: envelope a -> a
envelopeTransaction :: envelope a -> TransactionID envelope
envelopeClass :: envelope a -> MessageClass
-- | > buildReply self addr qry response
--
-- [ self ] this node's id.
--
-- [ addr ] SockAddr of query origin.
--
-- [ qry ] received query message.
--
-- [ response ] response payload.
--
-- Returns: response message envelope
buildReply :: NodeId envelope -> SockAddr -> envelope a -> b -> envelope b
class Envelope envelope => WireFormat raw envelope where
type SerializableTo raw :: * -> Constraint
type CipherContext raw envelope
decodeHeaders :: CipherContext raw envelope -> ByteString -> Either String (envelope raw)
decodePayload :: SerializableTo raw a => envelope raw -> Either String (envelope a)
encodeHeaders :: CipherContext raw envelope -> envelope raw -> ByteString
encodePayload :: SerializableTo raw a => envelope a -> envelope raw
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