first complete solution

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Lars Brünjes 2021-05-10 23:10:43 +02:00
parent 7152bc5e02
commit 54e726eb95
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@ -7,7 +7,7 @@ module Main
) where
import Control.Concurrent
import Control.Monad (when)
import Control.Exception
import Control.Monad.IO.Class (MonadIO (..))
import Data.Aeson (Result (..), fromJSON)
import Data.Monoid (Last (..))
@ -19,18 +19,40 @@ import Network.HTTP.Req
import Plutus.PAB.Events.ContractInstanceState (PartiallyDecodedResponse (..))
import Plutus.PAB.Webserver.Types
import System.Environment (getArgs)
import System.IO
import Text.Read (readMaybe)
import Week06.Oracle.PAB (OracleContracts)
main :: IO ()
main = do
[(i :: Int)] <- map read <$> getArgs
uuid <- read <$> readFile ('W' : show i ++ ".cid")
[i :: Int] <- map read <$> getArgs
uuid <- read <$> readFile ('W' : show i ++ ".cid")
hSetBuffering stdout NoBuffering
putStrLn $ "swap contract instance id for Wallet " ++ show i ++ ": " ++ show uuid
getFunds uuid
go uuid
where
go :: UUID -> IO a
go uuid = do
cmd <- readCommand
case cmd of
Offer amt -> offer uuid amt
Retrieve -> retrieve uuid
Use -> use uuid
Funds -> getFunds uuid
go uuid
readCommand :: IO Command
readCommand = do
putStr "enter command (Offer amt, Retrieve or Use): "
s <- getLine
maybe readCommand return $ readMaybe s
data Command = Offer Integer | Retrieve | Use | Funds
deriving (Show, Read, Eq, Ord)
getFunds :: UUID -> IO ()
getFunds uuid = runReq defaultHttpConfig $ do
getFunds uuid = handle h $ runReq defaultHttpConfig $ do
v <- req
POST
(http "127.0.0.1" /: "api" /: "new" /: "contract" /: "instance" /: pack (show uuid) /: "endpoint" /: "funds")
@ -47,40 +69,55 @@ getFunds uuid = runReq defaultHttpConfig $ do
(Proxy :: Proxy (JsonResponse (ContractInstanceClientState OracleContracts)))
(port 8080)
liftIO $ putStrLn $ case fromJSON $ observableState $ cicCurrentState $ responseBody w of
Success (Last (Just f)) -> "fund: " ++ show (flattenValue f)
Success (Last (Just f)) -> "funds: " ++ show (flattenValue f)
_ -> "error decoding state"
where
h :: HttpException -> IO ()
h _ = threadDelay 1_000_000 >> getFunds uuid
{-
liftIO $ putStrLn $ if responseStatusCode v == 200
then "updated oracle to " ++ show x
else "error updating oracle"
-}
{-
updateOracle :: UUID -> Integer -> IO ()
updateOracle uuid x = runReq defaultHttpConfig $ do
offer :: UUID -> Integer -> IO ()
offer uuid amt = handle h $ runReq defaultHttpConfig $ do
v <- req
POST
(http "127.0.0.1" /: "api" /: "new" /: "contract" /: "instance" /: pack (show uuid) /: "endpoint" /: "update")
(ReqBodyJson x)
(http "127.0.0.1" /: "api" /: "new" /: "contract" /: "instance" /: pack (show uuid) /: "endpoint" /: "offer")
(ReqBodyJson amt)
(Proxy :: Proxy (JsonResponse ()))
(port 8080)
liftIO $ putStrLn $ if responseStatusCode v == 200
then "updated oracle to " ++ show x
else "error updating oracle"
then "offered swap of " ++ show amt ++ " lovelace"
else "error offering swap"
where
h :: HttpException -> IO ()
h _ = threadDelay 1_000_000 >> offer uuid amt
getExchangeRate :: IO Integer
getExchangeRate = runReq defaultHttpConfig $ do
retrieve :: UUID -> IO ()
retrieve uuid = handle h $ runReq defaultHttpConfig $ do
v <- req
GET
(https "coinmarketcap.com" /: "currencies" /: "cardano")
NoReqBody
bsResponse
mempty
let priceRegex = "priceValue___11gHJ\">\\$([\\.0-9]*)" :: ByteString
(_, _, _, [bs]) = responseBody v =~ priceRegex :: (ByteString, ByteString, ByteString, [ByteString])
d = read $ unpack bs :: Double
x = round $ 1_000_000 * d
liftIO $ putStrLn $ "queried exchange rate: " ++ show d
return x
-}
POST
(http "127.0.0.1" /: "api" /: "new" /: "contract" /: "instance" /: pack (show uuid) /: "endpoint" /: "retrieve")
(ReqBodyJson ())
(Proxy :: Proxy (JsonResponse ()))
(port 8080)
liftIO $ putStrLn $ if responseStatusCode v == 200
then "retrieved swaps"
else "error retrieving swaps"
where
h :: HttpException -> IO ()
h _ = threadDelay 1_000_000 >> retrieve uuid
use :: UUID -> IO ()
use uuid = handle h $ runReq defaultHttpConfig $ do
v <- req
POST
(http "127.0.0.1" /: "api" /: "new" /: "contract" /: "instance" /: pack (show uuid) /: "endpoint" /: "use")
(ReqBodyJson ())
(Proxy :: Proxy (JsonResponse ()))
(port 8080)
liftIO $ putStrLn $ if responseStatusCode v == 200
then "used swap"
else "error using swap"
where
h :: HttpException -> IO ()
h _ = threadDelay 1_000_000 >> use uuid