main.hs

{-# LANGUAGE DataKinds           #-}
{-# LANGUAGE DeriveAnyClass      #-}
{-# LANGUAGE DeriveGeneric       #-}
{-# LANGUAGE FlexibleContexts    #-}
{-# LANGUAGE NoImplicitPrelude   #-}
{-# LANGUAGE OverloadedStrings   #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell     #-}
{-# LANGUAGE TypeApplications    #-}
{-# LANGUAGE TypeFamilies        #-}
{-# LANGUAGE TypeOperators       #-}

module CopyTradingContract where

import           PlutusTx
import           PlutusTx.Prelude
import           Ledger
import           Ledger.Ada
import           Ledger.Value
import           Ledger.Typed.Scripts
import           Ledger.TimeSlot
import           Plutus.Contract
import           Plutus.V1.Ledger.Api
import           Plutus.V1.Ledger.Contexts
import           Plutus.V1.Ledger.Tx
import           Plutus.V1.Ledger.Interval
import           Data.Aeson
import           Data.Text
import           GHC.Generics
import           Prelude (IO, Show)
import qualified Prelude

-- Define the copy trading parameters
data CopyTradingParams = CopyTradingParams
    { copyWalletAddress :: Address  -- Wallet address to copy trades from
    , maxBuyAmount      :: Integer  -- Maximum amount to spend per trade
    , slippageTolerance :: Rational -- Slippage tolerance (e.g., 1% = 1/100)
    } deriving (Show, Generic, ToJSON, FromJSON)

-- Define the copy trading action
data CopyTradingAction
    = CopyTrade
    | UpdateParams
    deriving (Show, Generic, ToJSON, FromJSON)

-- Define the copy trading datum
data CopyTradingDatum = CopyTradingDatum
    { trader          :: PubKeyHash
    , copiedWallet    :: Address
    , maxAmount       :: Integer
    , slippage        :: Rational
    } deriving (Show, Generic, ToJSON, FromJSON)

-- Define the copy trading redeemer
data CopyTradingRedeemer = CopyTradingRedeemer
    { action          :: CopyTradingAction
    } deriving (Show, Generic, ToJSON, FromJSON)

-- Define the copy trading validator
copyTradingValidator :: CopyTradingParams -> CopyTradingDatum -> CopyTradingRedeemer -> ScriptContext -> Bool
copyTradingValidator params datum redeemer ctx =
    case action redeemer of
        CopyTrade ->
            -- Validate the copy trade
            traceIfFalse "Invalid copy trade" (validateCopyTrade params datum ctx)
        UpdateParams ->
            -- Validate the parameter update
            traceIfFalse "Invalid parameter update" (validateUpdateParams params datum ctx)
  where
    info = scriptContextTxInfo ctx

-- Helper function to validate copy trades
validateCopyTrade :: CopyTradingParams -> CopyTradingDatum -> ScriptContext -> Bool
validateCopyTrade params datum ctx =
    let copiedWalletTx = getCopiedWalletTx (copyWalletAddress params)
        tradeAmount = getTradeAmount copiedWalletTx
        slippageAdjustedAmount = adjustForSlippage tradeAmount (slippageTolerance params)
    in tradeAmount <= maxBuyAmount params
    && traceIfFalse "Trade amount exceeds max buy amount" (tradeAmount <= maxBuyAmount params)
    && traceIfFalse "Slippage tolerance exceeded" (slippageAdjustedAmount >= tradeAmount * (1 - slippageTolerance params))

-- Helper function to validate parameter updates
validateUpdateParams :: CopyTradingParams -> CopyTradingDatum -> ScriptContext -> Bool
validateUpdateParams params datum ctx =
    let newParams = CopyTradingParams
            { copyWalletAddress = copiedWallet datum
            , maxBuyAmount = maxAmount datum
            , slippageTolerance = slippage datum
            }
    in newParams == params

-- Helper function to get the latest transaction from the copied wallet
getCopiedWalletTx :: Address -> TxInfo
getCopiedWalletTx address =
    -- Placeholder: Fetch the latest transaction from the copied wallet (requires off-chain integration)
    undefined

-- Helper function to get the trade amount from the copied wallet transaction
getTradeAmount :: TxInfo -> Integer
getTradeAmount txInfo =
    -- Placeholder: Extract the trade amount from the transaction (requires off-chain integration)
    undefined

-- Helper function to adjust the trade amount for slippage
adjustForSlippage :: Integer -> Rational -> Integer
adjustForSlippage amount slippage =
    amount * (1 - slippage)

-- Compile the validator
copyTradingValidatorCompiled :: CopyTradingParams -> CompiledCode (BuiltinData -> BuiltinData -> BuiltinData -> ())
copyTradingValidatorCompiled params = $$(compile [|| \d r ctx -> copyTradingValidator params (unsafeFromBuiltinData d) (unsafeFromBuiltinData r) (unsafeFromBuiltinData ctx) ||])

-- Define the copy trading script
copyTradingScript :: CopyTradingParams -> Script
copyTradingScript params = mkValidatorScript (copyTradingValidatorCompiled params)

-- Define the copy trading address
copyTradingAddress :: CopyTradingParams -> Address
copyTradingAddress params = scriptHashAddress (validatorHash (copyTradingScript params))

-- Define the copy trading contract
copyTradingContract :: CopyTradingParams -> Contract () CopyTradingSchema Text ()
copyTradingContract params = do
    -- Copy trade action
    handleCopyTrade <- endpoint @"copyTrade" $ \(trader, copiedWallet, maxAmount, slippage) -> do
        let datum = CopyTradingDatum { trader = trader, copiedWallet = copiedWallet, maxAmount = maxAmount, slippage = slippage }
        let tx = mustPayToTheScript datum (assetClassValue (assetClass "" "ADA") maxAmount)
        submitTxConstraints (copyTradingScript params) tx
        awaitTxConfirmed (getCardanoTxId tx)
        logInfo @Text $ "Copy trade executed for wallet " <> show copiedWallet

    -- Update parameters action
    handleUpdateParams <- endpoint @"updateParams" $ \(trader, copiedWallet, maxAmount, slippage) -> do
        let datum = CopyTradingDatum { trader = trader, copiedWallet = copiedWallet, maxAmount = maxAmount, slippage = slippage }
        let tx = mustPayToTheScript datum (assetClassValue (assetClass "" "ADA") maxAmount)
        submitTxConstraints (copyTradingScript params) tx
        awaitTxConfirmed (getCardanoTxId tx)
        logInfo @Text $ "Parameters updated for wallet " <> show copiedWallet

    -- Combine the handlers
    selectList [handleCopyTrade, handleUpdateParams]

-- Define the schema
type CopyTradingSchema =
    Endpoint "copyTrade" (PubKeyHash, Address, Integer, Rational)
    .\/ Endpoint "updateParams" (PubKeyHash, Address, Integer, Rational)

-- Define the main function
main :: IO ()
main = do
    -- Define the copy trading parameters
    let params = CopyTradingParams
            { copyWalletAddress = Address "addr1..."
            , maxBuyAmount = 100000000  -- 100 ADA in lovelace
            , slippageTolerance = 1 % 100  -- 1% slippage
            }

    -- Run the copy trading contract
    runPlutusApp $ copyTradingContract params