mirror of https://github.com/voidlizard/hbs2
238 lines
8.3 KiB
Haskell
238 lines
8.3 KiB
Haskell
{-# Language UndecidableInstances #-}
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{-# Language AllowAmbiguousTypes #-}
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{-# Language TemplateHaskell #-}
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module HBS2.Net.Proto.RefChan where
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import HBS2.Prelude.Plated
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import HBS2.Hash
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-- import HBS2.Clock
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import HBS2.Net.Proto
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import HBS2.Net.Auth.Credentials
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import HBS2.Base58
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-- import HBS2.Events
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import HBS2.Net.Proto.Peer
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import HBS2.Net.Proto.Sessions
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import HBS2.Data.Types.Refs
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import Data.Config.Suckless
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import HBS2.System.Logger.Simple
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import Codec.Serialise
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import Control.Monad.Identity
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import Control.Monad.Trans.Maybe
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import Data.ByteString (ByteString)
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import Data.ByteString.Lazy qualified as LBS
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import Data.Either
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import Data.Maybe
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import Data.Text qualified as Text
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import Lens.Micro.Platform
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import Data.Hashable hiding (Hashed)
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{- HLINT ignore "Use newtype instead of data" -}
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type RefChanId e = PubKey 'Sign (Encryption e)
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type RefChanOwner e = PubKey 'Sign (Encryption e)
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type RefChanAuthor e = PubKey 'Sign (Encryption e)
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data SignedBox p e =
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SignedBox (PubKey 'Sign (Encryption e)) ByteString (Signature (Encryption e))
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deriving stock (Generic)
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type Weight = Integer
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data RefChanHeadBlock e =
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RefChanHeadBlockSmall
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{ _refChanHeadVersion :: Integer
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, _refChanHeadQuorum :: Integer
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, _refChanHeadWaitAccept :: Integer
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, _refChanHeadPeers :: [(PubKey 'Sign (Encryption e),Weight)]
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, _refChanHeadAuthors :: [PubKey 'Sign (Encryption e)]
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}
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deriving stock (Generic)
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makeLenses 'RefChanHeadBlockSmall
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type ForRefChans e = ( Serialise ( PubKey 'Sign (Encryption e))
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, Pretty (AsBase58 (PubKey 'Sign (Encryption e)))
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, FromStringMaybe (PubKey 'Sign (Encryption e))
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, Serialise (Signature (Encryption e))
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)
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instance ForRefChans e => Serialise (RefChanHeadBlock e)
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instance ForRefChans e => Serialise (SignedBox p e)
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newtype RefChanHeadKey s = RefChanHeadKey (PubKey 'Sign s)
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deriving stock instance IsRefPubKey s => Eq (RefChanHeadKey s)
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instance IsRefPubKey s => Hashable (RefChanHeadKey s) where
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hashWithSalt s k = hashWithSalt s (hashObject @HbSync k)
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instance IsRefPubKey s => Hashed HbSync (RefChanHeadKey s) where
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hashObject (RefChanHeadKey pk) = hashObject ("refchanhead|" <> serialise pk)
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instance IsRefPubKey s => FromStringMaybe (RefChanHeadKey s) where
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fromStringMay s = RefChanHeadKey <$> fromStringMay s
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instance IsRefPubKey s => IsString (RefChanHeadKey s) where
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fromString s = fromMaybe (error "bad public key base58") (fromStringMay s)
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instance Pretty (AsBase58 (PubKey 'Sign s )) => Pretty (AsBase58 (RefChanHeadKey s)) where
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pretty (AsBase58 (RefChanHeadKey k)) = pretty (AsBase58 k)
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instance Pretty (AsBase58 (PubKey 'Sign s )) => Pretty (RefChanHeadKey s) where
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pretty (RefChanHeadKey k) = pretty (AsBase58 k)
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-- блок головы может быть довольно большой.
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-- поэтому посылаем его, как merkle tree
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newtype RefChanHeadBlockTran e =
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RefChanHeadBlockTran { fromRefChanHeadBlockTran :: HashRef }
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deriving stock (Generic)
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instance Serialise (RefChanHeadBlockTran e)
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data RefChanHead e =
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RefChanHead (RefChanId e) (RefChanHeadBlockTran e)
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| RefChanGetHead (RefChanId e)
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deriving stock (Generic)
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instance ForRefChans e => Serialise (RefChanHead e)
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data RefChanHeadAdapter e m =
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RefChanHeadAdapter
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{ refChanHeadOnHead :: RefChanHeadBlockTran e -> m ()
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}
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refChanHeadProto :: forall e s m . ( MonadIO m
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, Request e (RefChanHead e) m
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, Response e (RefChanHead e) m
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, IsPeerAddr e m
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, Pretty (Peer e)
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, Sessions e (KnownPeer e) m
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, Signatures s
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, Pretty (AsBase58 (PubKey 'Sign s))
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, s ~ Encryption e
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)
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=> Bool
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-> RefChanHeadAdapter e m
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-> RefChanHead e
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-> m ()
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refChanHeadProto self adapter msg = do
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-- авторизовать пира
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peer <- thatPeer (Proxy @(RefChanHead e))
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auth <- find (KnownPeerKey peer) id <&> isJust
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void $ runMaybeT do
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guard (auth || self)
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case msg of
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RefChanHead chan pkt -> do
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trace $ "RefChanHead" <+> pretty self <+> pretty (AsBase58 chan)
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lift $ refChanHeadOnHead adapter pkt
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RefChanGetHead _ -> do
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-- прочитать ссылку
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-- послать хэш головы
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pure ()
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makeSignedBox :: forall e p . (Serialise p, ForRefChans e, Signatures (Encryption e))
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=> PubKey 'Sign (Encryption e)
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-> PrivKey 'Sign (Encryption e)
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-> p
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-> SignedBox p e
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makeSignedBox pk sk msg = SignedBox @p @e pk bs sign
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where
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bs = LBS.toStrict (serialise msg)
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sign = makeSign @(Encryption e) sk bs
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unboxSignedBox :: forall p e . (Serialise p, ForRefChans e, Signatures (Encryption e))
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=> LBS.ByteString
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-> Maybe (PubKey 'Sign (Encryption e), p)
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unboxSignedBox bs = runIdentity $ runMaybeT do
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(SignedBox pk bs sign) <- MaybeT $ pure
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$ deserialiseOrFail @(SignedBox p e) bs
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& either (pure Nothing) Just
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guard $ verifySign @(Encryption e) pk sign bs
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p <- MaybeT $ pure $ deserialiseOrFail @p (LBS.fromStrict bs) & either (const Nothing) Just
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pure (pk, p)
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instance ForRefChans e => FromStringMaybe (RefChanHeadBlock e) where
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fromStringMay str = RefChanHeadBlockSmall <$> version
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<*> quorum
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<*> wait
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<*> pure peers
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<*> pure authors
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where
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parsed = parseTop str & fromRight mempty
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version = lastMay [ n | (ListVal [SymbolVal "version", LitIntVal n] ) <- parsed ]
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quorum = lastMay [ n | (ListVal [SymbolVal "quorum", LitIntVal n] ) <- parsed ]
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wait = lastMay [ n | (ListVal [SymbolVal "wait", LitIntVal n] ) <- parsed ]
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peers = catMaybes [ (,) <$> fromStringMay (Text.unpack s) <*> pure w
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| (ListVal [SymbolVal "peer", LitStrVal s, LitIntVal w] ) <- parsed
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]
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authors = catMaybes [ fromStringMay (Text.unpack s)
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| (ListVal [SymbolVal "author", LitStrVal s] ) <- parsed
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]
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instance ForRefChans e => Pretty (RefChanHeadBlock e) where
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pretty blk = parens ("version" <+> pretty (view refChanHeadVersion blk)) <> line
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<>
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parens ("quorum" <+> pretty (view refChanHeadQuorum blk)) <> line
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<>
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parens ("wait" <+> pretty (view refChanHeadWaitAccept blk)) <> line
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<>
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vcat (fmap peer (view refChanHeadPeers blk)) <> line
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<>
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vcat (fmap author (view refChanHeadAuthors blk)) <> line
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where
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peer (p,w) = parens ("peer" <+> dquotes (pretty (AsBase58 p)) <+> pretty w)
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author p = parens ("author" <+> dquotes (pretty (AsBase58 p)))
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-- TODO: implement-refchans-head
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-- Сгенерировать транзакцию RefHead
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-- Послать транзакцию RefHead
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-- Принять транзакцию RefHead
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-- Валидировать транзакцию RefHead
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-- Ответить на запрос RefChanGetHead
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--
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-- Как послать:
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-- надо сохранить и как-то передать в серверную часть пира
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-- или просто как-то передать в серверную часть пира.
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-- Блок может быть довольно большим (больше UDP) пакета
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--
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-- Вариант 1.
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-- Сохраняем hbs2 и дальше оперируем уже хэшем
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-- дерева.
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-- Что если пир на другом хосте? Черт
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-- его знает уже. Через HTTP API?
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--
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-- Вариант 2.
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-- Можно тоже самое из пира, но тогда надо узнать
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-- его сторейдж или всё-таки найти способ передать транзакцию
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-- ему в контекст
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--
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--
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--
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