1 --------------------------------------------------------------------------------
2 {-# LANGUAGE FlexibleContexts
14 --------------------------------------------------------------------------------
15 import Prelude
hiding (catch)
17 import Control
.Applicative
((<$>), (<*>), pure
)
18 import Control
.Concurrent
(forkIO
)
19 import Control
.Exception
(AsyncException
(..), catch, fromException
)
20 import Control
.Monad
(forever
, unless, liftM)
21 import Control
.Monad
.Trans
(lift
, liftIO
)
22 import Control
.Monad
.Trans
.Error
(Error
, ErrorT
(..), mapErrorT
, throwError
)
23 import Control
.Monad
.Trans
.State
25 import Data
.Aeson
.Types
26 import qualified Data
.ByteString
.Char8
as BS
27 import qualified Data
.ByteString
.Lazy
.Char8
as BSL8
28 import Data
.Foldable
(forM_
)
29 import Data
.List
(find, intersperse)
31 import qualified Data
.Map
as Map
32 import Data
.Maybe (catMaybes, fromMaybe, isJust, listToMaybe)
34 import qualified Data
.Set
as Set
35 import Data
.Text
(Text
)
36 import qualified Data
.Text
as T
37 import qualified Data
.Text
.IO as T
38 import Data
.Time
.Clock
39 import Database
.Esqueleto
hiding ((=.), get
, update
)
40 import Database
.Persist
.Postgresql
hiding ((==.), get
, update
)
41 import qualified Database
.Persist
.Postgresql
as P
42 import Database
.Persist
.TH
44 import qualified Network
.WebSockets
as WS
45 import Numeric
(showFFloat)
46 import System
.Environment
(getArgs)
47 import System
.Process
(readProcess
)
48 import Util
.ApproxEq
((~~
=))
49 import Util
.Either (doLeft
, isRight
)
50 import Util
.Monad
((>>=*), buildMap
)
51 import Util
.Set
(distinctPairs
)
55 --------------------------------------------------------------------------------
56 data AccountInfo
= AccountInfo
57 { dropsBalance
:: Integer
58 , currentSequence
:: Integer
59 , transferRate
:: Double
62 data IOUAmount
= IOUAmount
64 , iouQuantity
:: Double
68 newtype AccountLines
= AccountLines
[IOUAmount
]
76 = OfferCreate Amount Amount
Integer (Maybe Integer)
77 | OfferCancel
Integer Integer
83 , offerSequence
:: Integer
86 newtype Offers
= Offers
[Offer
]
89 { ledgerIndex
:: Integer
93 data RecordedTransaction
= RecordedTransaction
95 share
[mkPersist sqlSettings
, mkMigrate
"migrateAll"] [persistLowerCase|
105 FundStatusUnique fundId time
111 HalfLinkUnique root branch time
123 type NodeEntity
= Entity Node
124 type ValueSimplexND
= ValueSimplex NodeEntity
Double
126 data Rootstock
= Rootstock
128 , websocket
:: WS
.Connection
130 , valueSimplex
:: ValueSimplexND
133 type RootstockIO
= StateT Rootstock
IO
134 type ExceptionalRootstock
= ErrorT
String RootstockIO
()
137 --------------------------------------------------------------------------------
138 instance ToJSON Amount
where
139 toJSON
(Drops numDrops
) = toJSON
$ show numDrops
140 toJSON
(IOU iou
) = object
141 [ "currency" .= lineCurrency
(iouLine iou
)
142 , "issuer" .= peerAccount
(iouLine iou
)
143 , "value" .= showFFloat Nothing
(iouQuantity iou
) ""
146 instance ToJSON Transaction
where
147 toJSON
(OfferCreate toSell toBuy curSeq maybeOldOfferSequence
) = object
$
148 [ "TransactionType" .= ("OfferCreate" :: Text
)
149 , "Account" .= account
151 , "Sequence" .= curSeq
153 , "TakerPays" .= toBuy
154 , "TakerGets" .= toSell
157 (\oldOfferSequence
-> ["OfferSequence" .= show oldOfferSequence
])
158 maybeOldOfferSequence
159 toJSON
(OfferCancel curSeq oldOfferSequence
) = object
$
160 [ "TransactionType" .= ("OfferCancel" :: Text
)
161 , "Account" .= account
163 , "Sequence" .= curSeq
164 , "OfferSequence" .= oldOfferSequence
167 instance FromJSON AccountInfo
where
168 parseJSON
(Object obj
) = do
169 result
<- obj
.: "result"
170 accountData
<- result
.: "account_data"
172 <$> (accountData
.: "Balance" >>= return . read)
173 <*> accountData
.: "Sequence"
174 <*> (maybe 1 (/1000000000) <$> accountData
.:?
"TransferRate")
175 parseJSON
value = fail $
176 "Not an account info response:\n" ++ (BSL8
.unpack
$ encode
value)
178 instance FromJSON IOUAmount
where
179 parseJSON
(Object obj
) = IOUAmount
182 <*> obj
.: "currency")
183 <*> (obj
.: "balance" >>= return . read)
184 parseJSON
value = fail $
185 "Not an account line:\n" ++ (BSL8
.unpack
$ encode
value)
187 instance FromJSON AccountLines
where
188 parseJSON
(Object obj
) = do
189 result
<- obj
.: "result"
190 AccountLines
<$> result
.: "lines"
191 parseJSON
value = fail $
192 "Not a list of account lines:\n" ++ (BSL8
.unpack
$ encode
value)
194 instance FromJSON Amount
where
195 parseJSON
(Object obj
) = IOU
<$> (IOUAmount
198 <*> obj
.: "currency")
199 <*> (obj
.: "value" >>= return . read))
200 parseJSON
(String str
) = return $ Drops
$ read $ T
.unpack str
201 parseJSON
value = fail $
202 "Not an Amount:\n" ++ (BSL8
.unpack
$ encode
value)
204 instance FromJSON Offer
where
205 parseJSON
(Object obj
) = Offer
206 <$> obj
.: "taker_gets"
207 <*> obj
.: "taker_pays"
209 parseJSON
value = fail $
210 "Not an offer:\n" ++ (BSL8
.unpack
$ encode
value)
212 instance FromJSON Offers
where
213 parseJSON
(Object obj
) = do
214 result
<- obj
.: "result"
215 Offers
<$> result
.: "offers"
216 parseJSON
value = fail $
217 "Not a list of offers:\n" ++ (BSL8
.unpack
$ encode
value)
219 instance FromJSON Ledger
where
220 parseJSON
(Object obj
) = Ledger
221 <$> obj
.: "ledger_index"
223 parseJSON
value = fail $
224 "Not a ledger:\n" ++ (BSL8
.unpack
$ encode
value)
226 instance FromJSON RecordedTransaction
where
227 parseJSON
(Object obj
) = do
228 objType
<- obj
.: "type"
229 if objType
== ("transaction" :: Text
)
230 then return RecordedTransaction
232 "Not a recorded transaction:\n" ++ (BSL8
.unpack
$ encode
$ Object obj
)
233 parseJSON
value = fail $
234 "Not a recorded transaction:\n" ++ (BSL8
.unpack
$ encode
value)
237 --------------------------------------------------------------------------------
238 secretFile
, rsignPath
, sqlPassFile
:: FilePath
239 secretFile
= "/home/tim/Documents/passwords/ripple-secret.gpg"
241 "/home/tim/build/ripple/ripple-lib/node_modules/ripple-lib/bin/rsign.js"
242 sqlPassFile
= "sql-password.gpg"
244 connString
:: BS
.ByteString
245 connString
= "host=localhost port=5432 user=tim dbname=rootstock password="
248 account
= "rpY4wdftAiEH5y5uzxC2XAvy3G27UyeQKS"
250 fee
, tfSell
, reserve
:: Integer
255 generosity
, halfSpread
:: Double
259 lookupXRP
:: AccountInfo
-> Amount
260 lookupXRP acInfo
= Drops
$ dropsBalance acInfo
- reserve
262 lookupLine
:: AccountLines
-> IOULine
-> Maybe Amount
263 lookupLine
(AccountLines
lines) fundLine
= do
264 foundLine
<- find ((fundLine
==) . iouLine
) lines
265 return $ IOU foundLine
267 lookupFund
:: AccountInfo
-> AccountLines
-> Fund
-> Maybe Amount
268 lookupFund acInfo _ XRP
= Just
$ lookupXRP acInfo
269 lookupFund _ acLines
(IOUFund fundLine
) = lookupLine acLines fundLine
271 getQuantity
:: Amount
-> Double
272 getQuantity
(Drops n
) = fromInteger n
273 getQuantity
(IOU iou
) = iouQuantity iou
275 setQuantity
:: Amount
-> Double -> Amount
276 setQuantity
(Drops _
) q
= Drops
$ round q
277 setQuantity
(IOU iou
) q
= IOU
$ iou
{ iouQuantity
= q
}
279 getSequence
:: Transaction
-> Integer
280 getSequence
(OfferCreate _ _ curSeq _
) = curSeq
281 getSequence
(OfferCancel curSeq _
) = curSeq
283 lookupGetQuantity
:: AccountInfo
-> AccountLines
-> NodeEntity
-> Double
284 lookupGetQuantity acInfo acLines
=
285 fromMaybe 0 . liftM getQuantity
.
286 lookupFund acInfo acLines
. nodeFund
. entityVal
288 sellAtPrice
:: Amount
-> Amount
-> Double -> Double -> Double ->
290 sellAtPrice sellFrom buyTo sellFee buyFee p
=
292 q
= (getQuantity sellFrom
- sellFee
- (getQuantity buyTo
- buyFee
)/p
)/2
294 (setQuantity sellFrom q
, setQuantity buyTo
$ p
* q
)
296 sellAtHalfSpread
:: Amount
-> Amount
-> Double -> Double -> Double
298 sellAtHalfSpread sellFrom buyTo sellFee buyFee hSpread
=
299 sellAtPrice sellFrom buyTo sellFee buyFee
$
300 hSpread
* getQuantity buyTo
/ getQuantity sellFrom
302 validNoLoss
:: Amount
-> Amount
-> Double -> Double -> Amount
-> Amount
-> Bool
303 validNoLoss sellFrom buyTo sellFee buyFee toSell toBuy
=
305 sellFromQ
= getQuantity sellFrom
306 buyToQ
= getQuantity buyTo
307 toSellQ
= getQuantity toSell
308 toBuyQ
= getQuantity toBuy
310 toSellQ
> 0 && toBuyQ
> 0 &&
311 (sellFromQ
- toSellQ
- sellFee
) * (buyToQ
+ toBuyQ
- buyFee
) >=
314 fund
:: Amount
-> Fund
316 fund
(IOU iou
) = IOUFund
$ iouLine iou
318 fromNodeEntity
:: a
-> (IOULine
-> a
) -> NodeEntity
-> a
319 fromNodeEntity d f x
= case nodeFund
$ entityVal x
of
323 amount
:: Double -> NodeEntity
-> Amount
325 fromNodeEntity
(Drops
$ round q
) $ \l
->
326 IOU
$ IOUAmount
{iouLine
= l
, iouQuantity
= q
}
328 peerOfNodeEntity
:: NodeEntity
-> Maybe Text
329 peerOfNodeEntity
= fromNodeEntity Nothing
$ Just
. peerAccount
331 lookupOffer
:: Offers
-> Fund
-> Fund
-> Maybe Offer
332 lookupOffer
(Offers offers
) toSell toBuy
= find
333 (\offer
-> fund
(takerGets offer
) == toSell
&&
334 fund
(takerPays offer
) == toBuy
)
337 lookupOfferSequence
:: Offers
-> Fund
-> Fund
-> Maybe Integer
338 lookupOfferSequence offers toSell toBuy
= do
339 foundOffer
<- lookupOffer offers toSell toBuy
340 return $ offerSequence foundOffer
342 actionFinished
:: Entity ActionLog
-> Bool
343 actionFinished
= isJust . actionLogEnd
. entityVal
345 updatedValueSimplexWithGenerosity
::
346 Double -> ValueSimplexND
-> AccountInfo
-> AccountLines
-> ValueSimplexND
347 updatedValueSimplexWithGenerosity gen vs acInfo acLines
=
348 multiUpdate vs
$ \nodeEnt
->
349 let actual
= lookupGetQuantity acInfo acLines nodeEnt
in
350 case nodeFund
$ entityVal nodeEnt
of
354 updatedValueSimplex
::
355 ValueSimplexND
-> AccountInfo
-> AccountLines
-> ValueSimplexND
356 updatedValueSimplex
= updatedValueSimplexWithGenerosity
0
359 ValueSimplexND
-> (NodeEntity
-> Double) -> AccountInfo
-> [Transaction
]
360 makeTransactions vs trf acInfo
=
362 (flip zipWith $ Set
.toList
$ distinctPairs
$ nodes vs
)
363 [currentSequence acInfo
..]
364 $ \(x0
, x1
) curSeq
->
365 let (q0
, q1
) = linkOptimumAtPrice vs x0 x1
$ halfSpread
* price vs x0 x1
in
366 OfferCreate
(amount
(-q0
/ trf x0
) x0
) (amount q1 x1
) curSeq Nothing
368 --------------------------------------------------------------------------------
369 signTransaction
:: Transaction
-> RootstockIO
String
370 signTransaction tx
= do
372 blobNewLine
<- lift
$ readProcess
373 rsignPath
[sec
, BSL8
.unpack
$ encode tx
] ""
374 return $ init blobNewLine
377 --------------------------------------------------------------------------------
378 getSqlConnection
:: RootstockIO Connection
379 getSqlConnection
= gets sql
381 runSqlQuery
:: SqlPersistM a
-> RootstockIO a
382 runSqlQuery query
= do
383 sqlConn
<- getSqlConnection
384 lift
$ runSqlPersistM query sqlConn
386 getNodeEntities
:: SqlPersistM
[NodeEntity
]
387 getNodeEntities
= select
$ from
return
389 readValueSimplex
:: SqlPersistM ValueSimplexND
390 readValueSimplex
= do
391 nodeSet
<- Set
.fromList
<$> getNodeEntities
392 qMap
<- buildMap
(Set
.toList
$ distinctPairs nodeSet
) $ \(x
, y
) -> do
393 [Value q
] <- select
$ from
$ \hl
-> do
395 $ hl ^
. HalfLinkRoot
==. val
(entityKey x
)
396 &&. hl ^
. HalfLinkBranch
==. val
(entityKey y
)
397 orderBy
[desc
$ hl ^
. HalfLinkTime
]
399 return $ hl ^
. HalfLinkQuantity
401 return $ fromFunction
(curry $ flip (Map
.findWithDefault
0) qMap
) nodeSet
404 AccountInfo
-> AccountLines
-> ValueSimplexND
-> SqlPersistM
()
405 writeValueSimplex acInfo acLines vs
= do
406 time
<- liftIO getCurrentTime
407 insertMany
$ flip map (Set
.toList
$ nodes vs
) $ \nodeEnt
-> FundStatus
408 { fundStatusFundId
= entityKey nodeEnt
409 , fundStatusQuantity
= lookupGetQuantity acInfo acLines nodeEnt
410 , fundStatusTime
= time
412 forM_
(distinctPairs
$ nodes vs
) $ \(x
, y
) -> insert_
$ HalfLink
413 { halfLinkRoot
= entityKey x
414 , halfLinkBranch
= entityKey y
415 , halfLinkQuantity
= vsLookup vs x y
416 , halfLinkTime
= time
419 warn
:: Text
-> SqlPersistM
()
421 now
<- liftIO getCurrentTime
423 { warningWarning
= warning
427 getCurrentAction
:: SqlPersistM
(Entity ActionLog
)
428 getCurrentAction
= liftM head $ select
$ from
$ \ac
-> do
429 orderBy
[desc
$ ac ^
. ActionLogStart
]
433 startAction
:: Action
-> SqlPersistM ActionLogId
434 startAction action
= do
435 start
<- liftIO getCurrentTime
437 { actionLogAction
= action
438 , actionLogStart
= start
439 , actionLogEnd
= Nothing
440 , actionLogSuccess
= Nothing
443 endAction
:: ActionLogId
-> Bool -> SqlPersistM
()
444 endAction actionId success
= do
445 end
<- liftIO getCurrentTime
447 [ ActionLogEnd
=. Just end
448 , ActionLogSuccess
=. Just success
451 intervene
:: Action
-> ExceptionalRootstock
-> RootstockIO
()
452 intervene action intervention
= do
453 actionId
<- runSqlQuery
$ startAction action
454 result
<- runErrorT intervention
455 doLeft
(lift
. putStrLn) result
456 runSqlQuery
$ endAction actionId
$ isRight result
459 --------------------------------------------------------------------------------
460 runWebsocket
:: WS
.ClientApp a
-> RootstockIO a
461 runWebsocket app
= gets websocket
>>= lift
. app
463 receiveData
:: WS
.WebSocketsData a
=> RootstockIO a
464 receiveData
= runWebsocket WS
.receiveData
466 sendTextData
:: WS
.WebSocketsData a
=> a
-> RootstockIO
()
467 sendTextData x
= runWebsocket
$ flip WS
.sendTextData x
469 waitForType
:: FromJSON a
=> RootstockIO a
471 encoded
<- receiveData
472 case decode encoded
of
474 lift
$ putStrLn ("Skipping:\n" ++ (BSL8
.unpack encoded
))
477 lift
$ putStrLn ("Using:\n" ++ (BSL8
.unpack encoded
))
480 signAndSend
:: Transaction
-> RootstockIO
()
482 txBlob
<- signTransaction tx
483 sendTextData
$ encode
$ object
484 [ "command" .= ("submit" :: Text
)
485 , "tx_blob" .= txBlob
488 submitSellOffer
:: Amount
-> Amount
-> Double -> Double -> Double -> Offers
->
489 Integer -> RootstockIO
Integer
492 sellFee buyFee hSpread
495 (toSell
, toBuy
) = sellAtHalfSpread sellFrom buyTo sellFee buyFee hSpread
496 maybeOldOfferSequence
=
497 lookupOfferSequence offers
(fund sellFrom
) $ fund buyTo
498 tx
= OfferCreate toSell toBuy curSeq Nothing
499 lift
$ BSL8
.putStrLn $ encode tx
500 if validNoLoss sellFrom buyTo sellFee buyFee toSell toBuy
503 case maybeOldOfferSequence
of
504 Nothing
-> return $ curSeq
+ 1
505 Just oldOfferSequence
-> do
506 signAndSend
$ OfferCancel
(curSeq
+ 1) oldOfferSequence
509 lift
$ putStrLn "Skipping the above: either invalid or loss-making"
512 subscribe
:: [Pair
] -> WS
.ClientApp
()
514 flip WS
.sendTextData
$ encode
$ object
$
515 ["command" .= ("subscribe" :: Text
)] ++ options
517 subscribeAccount
:: WS
.ClientApp
()
518 subscribeAccount
= subscribe
["accounts" .= [account
]]
520 queryOwnAccount
:: FromJSON a
=> Text
-> RootstockIO a
521 queryOwnAccount command
= do
522 sendTextData
$ encode
$ object
523 [ "command" .= command
524 , "account" .= account
528 getAccountInfo
:: RootstockIO AccountInfo
529 getAccountInfo
= queryOwnAccount
"account_info"
531 getAccountLines
:: RootstockIO AccountLines
532 getAccountLines
= queryOwnAccount
"account_lines"
534 getAccountOffers
:: RootstockIO Offers
535 getAccountOffers
= queryOwnAccount
"account_offers"
537 getPeerAccountInfo
:: Text
-> RootstockIO AccountInfo
538 getPeerAccountInfo peer
= do
539 sendTextData
$ encode
$ object
540 [ "command" .= ("account_info" :: Text
)
545 clearAndUpdate
:: RootstockIO
()
546 {- Must have subscribed to ledger updates for this to work -}
548 Offers offerList
<- getAccountOffers
549 acInfo
<- getAccountInfo
552 acLines
<- getAccountLines
553 vs
<- gets valueSimplex
554 let vs
' = updatedValueSimplex vs acInfo acLines
555 if strictlySuperior
(~~
=) vs
' vs
559 vs
'' = updatedValueSimplexWithGenerosity generosity vs acInfo acLines
561 = " non-superior ValueSimplex (generosity: "
562 `T
.append` T
.pack
(show generosity
)
564 if strictlySuperior
(~~
=) vs
'' vs
565 then runSqlQuery
$ warn
$ "Slightly" `T
.append` warning
566 else error $ "Seriously" ++ T
.unpack warning
567 runSqlQuery
$ writeValueSimplex acInfo acLines vs
'
568 modify
$ \rs
-> rs
{valueSimplex
= vs
'}
570 forM_
(zip offerList
[currentSequence acInfo
..]) $ \(off
, seq) ->
571 signAndSend
$ OfferCancel
seq $ offerSequence off
572 waitForType
:: RootstockIO Ledger
575 getUpdatedValueSimplexWithAccountInfo
::
576 AccountInfo
-> RootstockIO ValueSimplexND
577 getUpdatedValueSimplexWithAccountInfo acInfo
=
578 updatedValueSimplex
<$> gets valueSimplex
<*> pure acInfo
<*> getAccountLines
580 getUpdatedValueSimplex
:: RootstockIO ValueSimplexND
581 getUpdatedValueSimplex
=
582 getUpdatedValueSimplexWithAccountInfo
=<< getAccountInfo
584 strictlySuperiorToCurrent
:: ValueSimplexND
-> RootstockIO
Bool
585 strictlySuperiorToCurrent vs
' = strictlySuperior
(~~
=) vs
' <$> gets valueSimplex
587 waitForImprovement
:: RootstockIO
()
588 waitForImprovement
= do
589 waitForType
:: RootstockIO Ledger
590 waitForType
:: RootstockIO RecordedTransaction
591 improvement
<- strictlySuperiorToCurrent
=<< getUpdatedValueSimplex
594 else waitForImprovement
596 submitAndWait
:: [Transaction
] -> RootstockIO
()
597 submitAndWait txs
= do
598 forM_ txs signAndSend
599 waitForType
:: RootstockIO Ledger
600 acInfo
<- getAccountInfo
602 strictlySuperiorToCurrent
=<< getUpdatedValueSimplexWithAccountInfo acInfo
605 else case dropWhile ((currentSequence acInfo
>) . getSequence
) txs
of
606 [] -> waitForImprovement
607 txs
' -> submitAndWait txs
'
609 getTransitRates
:: RootstockIO
(NodeEntity
-> Double)
611 peers
<- catMaybes . Set
.toList
. Set
.map peerOfNodeEntity
. nodes
612 <$> gets valueSimplex
613 trm
<- buildMap peers
$ \peer
-> transferRate
<$> getPeerAccountInfo peer
614 return $ \x
-> fromMaybe 1 $ peerOfNodeEntity x
>>= flip Map
.lookup trm
616 marketMakerLoop
:: RootstockIO
()
619 makeTransactions
<$> gets valueSimplex
<*> getTransitRates
<*> getAccountInfo
624 --------------------------------------------------------------------------------
625 throwIf
:: (Error e
, Monad m
) => Bool -> e
-> ErrorT e m
()
626 throwIf test err
= if test
then throwError err
else return ()
628 setupDatabase
:: IOULine
-> ExceptionalRootstock
629 setupDatabase fundLine
= do
630 existingNodes
<- lift
$ runSqlQuery getNodeEntities
631 throwIf
(not $ null existingNodes
) "Database already has nodes"
632 acInfo
<- lift getAccountInfo
633 let dropsBal
= getQuantity
$ lookupXRP acInfo
634 throwIf
(dropsBal
<= 0) "Not enough XRP to meet desired reserve"
635 acLines
<- lift getAccountLines
636 lineBal
<- case lookupLine acLines fundLine
of
637 Nothing
-> throwError
"Requested IOU line not found"
638 Just amount
-> return $ getQuantity amount
639 throwIf
(lineBal
<= 0) "Non-positive balance in requested IOU line"
640 let xrpNode
= Node
{nodeFund
= XRP
}
641 lineNode
= Node
{nodeFund
= IOUFund fundLine
}
642 lift
$ runSqlQuery
$ do
643 xrpId
<- insert xrpNode
644 lineId
<- insert lineNode
645 let xrpNodeEntity
= Entity
{entityKey
= xrpId
, entityVal
= xrpNode
}
646 lineNodeEntity
= Entity
{entityKey
= lineId
, entityVal
= lineNode
}
647 writeValueSimplex acInfo acLines
$
648 flip fromFunction
(Set
.fromList
[xrpNodeEntity
, lineNodeEntity
]) $ \x _
->
649 if x
== xrpNodeEntity
654 --------------------------------------------------------------------------------
655 {- getLinkEntities :: RootstockIO [Entity Link]
656 getLinkEntities = runSqlQuery $ select $ from return
658 getLinks :: RootstockIO [Link]
659 getLinks = liftM (map entityVal) getLinkEntities
661 waitForAction :: RootstockIO Offers
663 sendTextData $ encode $ object
664 [ "command" .= ("account_offers" :: Text)
665 , "account" .= account
667 offers <- waitForType
669 if all (bothOffersPresent offers) links
671 RecordedTransaction <- waitForType
675 currentLinkStatus :: LinkId -> RootstockIO (Maybe LinkStatus)
676 currentLinkStatus linkId = do
677 statusList <- runSqlQuery $ select $ from $ \status -> do
678 where_ $ status ^. LinkStatusLinkId ==. val linkId
679 orderBy [desc $ status ^. LinkStatusTimestamp]
682 return $ liftM entityVal $ listToMaybe statusList
684 submitLinkOffers :: AccountInfo -> AccountLines ->
685 Offers -> Entity Link -> Integer -> RootstockIO Integer
686 submitLinkOffers acInfo acLines offers (Entity linkId link) curSeq = do
687 if bothOffersPresent offers link
690 maybeHSpread <- liftM (liftM linkStatusHalfSpread) $
691 currentLinkStatus linkId
694 right = linkRight link
695 feeForCalcs XRP = fromInteger $ 3 * fee
697 leftFeeForCalcs = feeForCalcs left
698 rightFeeForCalcs = feeForCalcs right
700 ( lookupFund acInfo acLines left
701 , lookupFund acInfo acLines right
704 (Just leftTotal, Just rightTotal, Just hSpread) -> do
705 now <- lift getCurrentTime
707 insert $ HalfLink left right (getQuantity leftTotal) now
708 insert $ HalfLink right left (getQuantity rightTotal) now
709 nextSeq <- submitSellOffer
711 leftFeeForCalcs rightFeeForCalcs hSpread
715 rightFeeForCalcs leftFeeForCalcs hSpread
719 "The link status or one of the lines of credit wasn't found"
722 marketMakerLoop :: RootstockIO ()
724 offers <- waitForAction
725 sendTextData $ encode $ object
726 [ "command" .= ("account_info" :: Text)
727 , "account" .= account
729 acInfo <- waitForType
730 sendTextData $ encode $ object
731 [ "command" .= ("account_lines" :: Text)
732 , "account" .= account
734 acLines <- waitForType
735 linkEntities <- getLinkEntities
736 currentSequence acInfo >>=*
737 map (submitLinkOffers acInfo acLines offers) linkEntities
740 marketMaker :: RootstockIO ()
745 insertOldLink :: OldLink -> RootstockIO ()
746 insertOldLink link = do
747 now <- lift getCurrentTime
749 linkId <- insert $ Link (leftFund link) (rightFund link)
750 insert $ LinkStatus linkId (halfSpread link) now
754 --------------------------------------------------------------------------------
755 runRootstock
:: RootstockIO a
-> Rootstock
-> IO a
756 runRootstock
= evalStateT
758 marketMaker
:: RootstockIO
()
760 runWebsocket
$ subscribe
761 [ "streams" .= ["ledger" :: Text
]
762 , "accounts" .= [account
]
764 result
<- runErrorT
$ do
765 mapErrorT runSqlQuery
$ do
766 curAc
<- lift getCurrentAction
768 (not $ actionFinished curAc
)
769 "Another process hasn't yet cleanly finished with the database"
770 lift
$ startAction Running
772 liftIO
$ catch (runRootstock marketMakerLoop rs
) $ \e
-> do
773 flip runSqlPersistM
(sql rs
) $ do
774 curAc
<- getCurrentAction
775 if (actionLogAction
(entityVal curAc
) == Running
776 && not (actionFinished curAc
))
780 $ fromException e `
elem`
map Just
[ThreadKilled
, UserInterrupt
]
782 putStrLn $ "Exiting on: " ++ show e
783 doLeft
(lift
. putStrLn) result
785 rippleInteract
:: WS
.ClientApp
()
786 rippleInteract conn
= do
787 -- Fork a thread that writes WS data to stdout
788 _
<- forkIO
$ forever
$ do
789 msg
<- WS
.receiveData conn
790 liftIO
$ T
.putStrLn msg
792 runRipple subscribeAccount
794 -- Read from stdin and write to WS
797 unless (T
.null line
) $ WS
.sendTextData conn line
>> loop
800 WS
.sendClose conn
("Bye!" :: Text
)
802 readSecret
:: IO String
803 readSecret
= readProcess
"gpg" ["-o", "-", secretFile
] ""
805 readSqlPass
:: IO BS
.ByteString
806 readSqlPass
= readProcess
"gpg" ["-o", "-", sqlPassFile
] "" >>= return . BS
.pack
808 runRipple
:: WS
.ClientApp a
-> IO a
809 runRipple app
= WS
.runClient
"s1.ripple.com" 443 "/" app
811 runRippleWithSecret
:: RootstockIO a
-> IO a
812 runRippleWithSecret app
= do
814 sqlPass
<- readSqlPass
815 withPostgresqlConn
(BS
.concat [connString
, sqlPass
]) $ \sqlConn
-> do
816 vs
<- flip runSqlPersistM sqlConn
$ do
817 runMigration migrateAll
819 runRipple
$ \wsConn
->
820 runRootstock app
$ Rootstock
827 {- insertOldLinks :: IO ()
828 insertOldLinks = runRippleWithSecret $ sequence_ $ map insertOldLink oldLinks -}
834 ["setup", currency
, peer
] -> runRippleWithSecret
$ intervene InitialSetup
$
835 setupDatabase
$ IOULine
836 { peerAccount
= T
.pack peer
837 , lineCurrency
= T
.pack currency
839 _
-> putStrLn "Command not understood"