package XDCxlending

import (
	"encoding/json"
	"errors"
	"fmt"
	"math/big"

	"github.com/XinFinOrg/XDPoSChain/XDCx/tradingstate"
	"github.com/XinFinOrg/XDPoSChain/XDCxlending/lendingstate"
	"github.com/XinFinOrg/XDPoSChain/common"
	"github.com/XinFinOrg/XDPoSChain/consensus"
	"github.com/XinFinOrg/XDPoSChain/core/state"
	"github.com/XinFinOrg/XDPoSChain/core/types"
	"github.com/XinFinOrg/XDPoSChain/log"
)

func (l *Lending) CommitOrder(header *types.Header, coinbase common.Address, chain consensus.ChainContext, statedb *state.StateDB, lendingStateDB *lendingstate.LendingStateDB, tradingStateDb *tradingstate.TradingStateDB, lendingOrderBook common.Hash, order *lendingstate.LendingItem) ([]*lendingstate.LendingTrade, []*lendingstate.LendingItem, error) {
	lendingSnap := lendingStateDB.Snapshot()
	tradingSnap := tradingStateDb.Snapshot()
	dbSnap := statedb.Snapshot()
	trades, rejects, err := l.ApplyOrder(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingOrderBook, order)
	if err != nil {
		lendingStateDB.RevertToSnapshot(lendingSnap)
		tradingStateDb.RevertToSnapshot(tradingSnap)
		statedb.RevertToSnapshot(dbSnap)
		return nil, nil, err
	}
	return trades, rejects, err
}

func (l *Lending) ApplyOrder(header *types.Header, coinbase common.Address, chain consensus.ChainContext, statedb *state.StateDB, lendingStateDB *lendingstate.LendingStateDB, tradingStateDb *tradingstate.TradingStateDB, lendingOrderBook common.Hash, order *lendingstate.LendingItem) ([]*lendingstate.LendingTrade, []*lendingstate.LendingItem, error) {
	var (
		rejects []*lendingstate.LendingItem
		trades  []*lendingstate.LendingTrade
		err     error
	)
	nonce := lendingStateDB.GetNonce(order.UserAddress.Hash())
	log.Debug("ApplyOrder", "addr", order.UserAddress, "statenonce", nonce, "ordernonce", order.Nonce)
	if big.NewInt(int64(nonce)).Cmp(order.Nonce) == -1 {
		return nil, nil, ErrNonceTooHigh
	} else if big.NewInt(int64(nonce)).Cmp(order.Nonce) == 1 {
		return nil, nil, ErrNonceTooLow
	}

	log.Debug("Exchange add user nonce:", "address", order.UserAddress, "status", order.Status, "nonce", nonce+1)
	lendingStateDB.SetNonce(order.UserAddress.Hash(), nonce+1)

	lendingSnap := lendingStateDB.Snapshot()
	tradingSnap := tradingStateDb.Snapshot()
	dbSnap := statedb.Snapshot()
	// revert if process order fail
	defer func() {
		if err != nil {
			lendingStateDB.RevertToSnapshot(lendingSnap)
			tradingStateDb.RevertToSnapshot(tradingSnap)
			statedb.RevertToSnapshot(dbSnap)
		}
	}()

	if err := order.VerifyLendingItem(statedb); err != nil {
		log.Debug("invalid lending order", "order", lendingstate.ToJSON(order), "err", err)
		rejects = append(rejects, order)
		return trades, rejects, nil
	}

	switch order.Type {
	case lendingstate.TopUp:
		reject, newLendingTrade, err := l.ProcessTopUp(lendingStateDB, statedb, tradingStateDb, order)
		if err != nil || reject {
			rejects = append(rejects, order)
		}
		trades = append(trades, newLendingTrade)
		return trades, rejects, nil
	case lendingstate.Repay:
		lendingTrade, err := l.ProcessRepay(header, chain, lendingStateDB, statedb, tradingStateDb, lendingOrderBook, order)
		if err != nil {
			log.Debug("Can not process payment", "err", err)
			rejects = append(rejects, order)
		}
		trades = append(trades, lendingTrade)
		return trades, rejects, nil
	default:
	}

	if order.Status == lendingstate.LendingStatusCancelled {
		err, reject := l.ProcessCancelOrder(header, lendingStateDB, statedb, tradingStateDb, chain, coinbase, lendingOrderBook, order)
		if err != nil || reject {
			rejects = append(rejects, order)
		}
		return trades, rejects, nil
	}

	if order.Type != lendingstate.Market {
		if order.Interest.Sign() == 0 || common.BigToHash(order.Interest).Big().Cmp(order.Interest) != 0 {
			log.Debug("Reject order Interest invalid", "Interest", order.Interest)
			rejects = append(rejects, order)
			return trades, rejects, nil
		}
	}
	if order.Quantity.Sign() == 0 || common.BigToHash(order.Quantity).Big().Cmp(order.Quantity) != 0 {
		log.Debug("Reject order quantity invalid", "quantity", order.Quantity)
		rejects = append(rejects, order)
		return trades, rejects, nil
	}
	orderType := order.Type
	// if we do not use auto-increment orderid, we must set Interest slot to avoid conflict
	if orderType == lendingstate.Market {
		log.Debug("Process maket order", "side", order.Side, "quantity", order.Quantity, "Interest", order.Interest)
		trades, rejects, err = l.processMarketOrder(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingOrderBook, order)
		if err != nil {
			trades = []*lendingstate.LendingTrade{}
			rejects = append(rejects, order)
		}
	} else {
		log.Debug("Process limit order", "side", order.Side, "quantity", order.Quantity, "Interest", order.Interest)
		trades, rejects, err = l.processLimitOrder(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingOrderBook, order)
		if err != nil {
			trades = []*lendingstate.LendingTrade{}
			rejects = append(rejects, order)
		}
	}
	return trades, rejects, nil
}

// processMarketOrder : process the market order
func (l *Lending) processMarketOrder(header *types.Header, coinbase common.Address, chain consensus.ChainContext, statedb *state.StateDB, lendingStateDB *lendingstate.LendingStateDB, tradingStateDb *tradingstate.TradingStateDB, lendingOrderBook common.Hash, order *lendingstate.LendingItem) ([]*lendingstate.LendingTrade, []*lendingstate.LendingItem, error) {
	var (
		trades     []*lendingstate.LendingTrade
		newTrades  []*lendingstate.LendingTrade
		rejects    []*lendingstate.LendingItem
		newRejects []*lendingstate.LendingItem
		err        error
	)
	quantityToTrade := order.Quantity
	side := order.Side
	// speedup the comparison, do not assign because it is pointer
	zero := lendingstate.Zero
	if side == lendingstate.Borrowing {
		bestInterest, volume := lendingStateDB.GetBestInvestingRate(lendingOrderBook)
		log.Debug("processMarketOrder ", "side", side, "bestInterest", bestInterest, "quantityToTrade", quantityToTrade, "volume", volume)
		for quantityToTrade.Cmp(zero) > 0 && bestInterest.Cmp(zero) > 0 {
			quantityToTrade, newTrades, newRejects, err = l.processOrderList(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingstate.Investing, lendingOrderBook, bestInterest, quantityToTrade, order)
			if err != nil {
				return nil, nil, err
			}
			trades = append(trades, newTrades...)
			rejects = append(rejects, newRejects...)
			bestInterest, volume = lendingStateDB.GetBestInvestingRate(lendingOrderBook)
			log.Debug("processMarketOrder ", "side", side, "bestInterest", bestInterest, "quantityToTrade", quantityToTrade, "volume", volume)
		}
	} else {
		bestInterest, volume := lendingStateDB.GetBestBorrowRate(lendingOrderBook)
		log.Debug("processMarketOrder ", "side", side, "bestInterest", bestInterest, "quantityToTrade", quantityToTrade, "volume", volume)
		for quantityToTrade.Cmp(zero) > 0 && bestInterest.Cmp(zero) > 0 {
			quantityToTrade, newTrades, newRejects, err = l.processOrderList(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingstate.Borrowing, lendingOrderBook, bestInterest, quantityToTrade, order)
			if err != nil {
				return nil, nil, err
			}
			trades = append(trades, newTrades...)
			rejects = append(rejects, newRejects...)
			bestInterest, volume = lendingStateDB.GetBestBorrowRate(lendingOrderBook)
			log.Debug("processMarketOrder ", "side", side, "bestInterest", bestInterest, "quantityToTrade", quantityToTrade, "volume", volume)
		}
	}
	return trades, rejects, nil
}

// processLimitOrder : process the limit order, can change the quote
// If not care for performance, we should make a copy of quote to prevent further reference problem
func (l *Lending) processLimitOrder(header *types.Header, coinbase common.Address, chain consensus.ChainContext, statedb *state.StateDB, lendingStateDB *lendingstate.LendingStateDB, tradingStateDb *tradingstate.TradingStateDB, lendingOrderBook common.Hash, order *lendingstate.LendingItem) ([]*lendingstate.LendingTrade, []*lendingstate.LendingItem, error) {
	var (
		trades     []*lendingstate.LendingTrade
		newTrades  []*lendingstate.LendingTrade
		rejects    []*lendingstate.LendingItem
		newRejects []*lendingstate.LendingItem
		err        error
	)
	quantityToTrade := order.Quantity
	side := order.Side
	Interest := order.Interest

	// speedup the comparison, do not assign because it is pointer
	zero := lendingstate.Zero
	if side == lendingstate.Borrowing {
		minInterest, volume := lendingStateDB.GetBestInvestingRate(lendingOrderBook)
		log.Debug("processLimitOrder ", "side", side, "minInterest", minInterest, "orderInterest", Interest, "volume", volume)
		for quantityToTrade.Cmp(zero) > 0 && Interest.Cmp(minInterest) >= 0 && minInterest.Cmp(zero) > 0 {
			log.Debug("Min Interest in Investing tree", "Interest", minInterest.String())
			quantityToTrade, newTrades, newRejects, err = l.processOrderList(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingstate.Investing, lendingOrderBook, minInterest, quantityToTrade, order)
			if err != nil {
				return nil, nil, err
			}
			trades = append(trades, newTrades...)
			rejects = append(rejects, newRejects...)
			log.Debug("New trade found", "newTrades", newTrades, "quantityToTrade", quantityToTrade)
			minInterest, volume = lendingStateDB.GetBestInvestingRate(lendingOrderBook)
			log.Debug("processLimitOrder ", "side", side, "minInterest", minInterest, "orderInterest", Interest, "volume", volume)
		}
	} else {
		maxInterest, volume := lendingStateDB.GetBestBorrowRate(lendingOrderBook)
		log.Debug("processLimitOrder ", "side", side, "maxInterest", maxInterest, "orderInterest", Interest, "volume", volume)
		for quantityToTrade.Cmp(zero) > 0 && Interest.Cmp(maxInterest) <= 0 && maxInterest.Cmp(zero) > 0 {
			log.Debug("Max Interest in Borrowing tree", "Interest", maxInterest.String())
			quantityToTrade, newTrades, newRejects, err = l.processOrderList(header, coinbase, chain, statedb, lendingStateDB, tradingStateDb, lendingstate.Borrowing, lendingOrderBook, maxInterest, quantityToTrade, order)
			if err != nil {
				return nil, nil, err
			}
			trades = append(trades, newTrades...)
			rejects = append(rejects, newRejects...)
			log.Debug("New trade found", "newTrades", newTrades, "quantityToTrade", quantityToTrade)
			maxInterest, volume = lendingStateDB.GetBestBorrowRate(lendingOrderBook)
			log.Debug("processLimitOrder ", "side", side, "maxInterest", maxInterest, "orderInterest", Interest, "volume", volume)
		}
	}
	if quantityToTrade.Cmp(zero) > 0 {
		oldOrderId := lendingStateDB.GetNonce(lendingOrderBook)
		order.LendingId = oldOrderId + 1
		order.Quantity = quantityToTrade
		lendingStateDB.SetNonce(lendingOrderBook, oldOrderId+1)
		orderIdHash := common.BigToHash(new(big.Int).SetUint64(order.LendingId))
		lendingStateDB.InsertLendingItem(lendingOrderBook, orderIdHash, *order)
		log.Debug("After matching, order (unmatched part) is now added to tree", "side", order.Side, "order", order)
		investingRate, investingVolume := lendingStateDB.GetBestInvestingRate(lendingOrderBook)
		borrowingRate, borrowingVolume := lendingStateDB.GetBestBorrowRate(lendingOrderBook)
		log.Debug("After matching", "side", order.Side, "LendingId", order.LendingId, "investingRate", investingRate, "investingVolume", investingVolume, "borrowingRate", borrowingRate, "borrowingVolume", borrowingVolume)
	}
	return trades, rejects, nil
}

// processOrderList : process the order list
func (l *Lending) processOrderList(header *types.Header, coinbase common.Address, chain consensus.ChainContext, statedb *state.StateDB, lendingStateDB *lendingstate.LendingStateDB, tradingStateDb *tradingstate.TradingStateDB, side string, lendingOrderBook common.Hash, Interest *big.Int, quantityStillToTrade *big.Int, order *lendingstate.LendingItem) (*big.Int, []*lendingstate.LendingTrade, []*lendingstate.LendingItem, error) {
	quantityToTrade := lendingstate.CloneBigInt(quantityStillToTrade)
	log.Debug("Process matching between order and orderlist", "quantityToTrade", quantityToTrade)
	var (
		trades  []*lendingstate.LendingTrade
		rejects []*lendingstate.LendingItem
	)
	for quantityToTrade.Sign() > 0 {
		orderId, amount, err := lendingStateDB.GetBestLendingIdAndAmount(lendingOrderBook, Interest, side)
		if err != nil {
			return nil, nil, nil, err
		}
		var oldestOrder lendingstate.LendingItem
		if amount.Sign() > 0 {
			oldestOrder = lendingStateDB.GetLendingOrder(lendingOrderBook, orderId)
		}
		log.Debug("found order ", "orderId ", orderId, "side", oldestOrder.Side, "amount", amount, "side", side, "Interest", Interest)
		if oldestOrder.Quantity == nil || oldestOrder.Quantity.Sign() == 0 && amount.Sign() == 0 {
			break
		}
		var (
			tradedQuantity    *big.Int
			maxTradedQuantity *big.Int
		)
		if quantityToTrade.Cmp(amount) <= 0 {
			maxTradedQuantity = lendingstate.CloneBigInt(quantityToTrade)
		} else {
			maxTradedQuantity = lendingstate.CloneBigInt(amount)
		}
		collateralToken := order.CollateralToken
		borrowFee := lendingstate.GetFee(statedb, order.Relayer)
		if order.Side == lendingstate.Investing {
			collateralToken = oldestOrder.CollateralToken
			borrowFee = lendingstate.GetFee(statedb, oldestOrder.Relayer)
		}
		if collateralToken.IsZero() {
			return nil, nil, nil, errors.New("empty collateral")
		}
		depositRate, liquidationRate, recallRate := lendingstate.GetCollateralDetail(statedb, collateralToken)
		if depositRate == nil || depositRate.Sign() <= 0 {
			return nil, nil, nil, fmt.Errorf("invalid depositRate %v", depositRate)
		}
		if liquidationRate == nil || liquidationRate.Sign() <= 0 {
			return nil, nil, nil, fmt.Errorf("invalid liquidationRate %v", liquidationRate)
		}
		if recallRate == nil || recallRate.Sign() <= 0 {
			return nil, nil, nil, fmt.Errorf("invalid recallRate %v", recallRate)
		}

		lendTokenXDCPrice, collateralPrice, err := l.GetCollateralPrices(header, chain, statedb, tradingStateDb, collateralToken, order.LendingToken)
		if err != nil {
			return nil, nil, nil, err
		}
		if lendTokenXDCPrice == nil || lendTokenXDCPrice.Sign() <= 0 {
			return nil, nil, nil, errors.New("invalid lendToken price")
		}
		if collateralPrice == nil || collateralPrice.Sign() <= 0 {
			return nil, nil, nil, errors.New("invalid collateral price")
		}
		tradedQuantity, collateralLockedAmount, rejectMaker, settleBalanceResult, err := l.getLendQuantity(lendTokenXDCPrice, collateralPrice, depositRate, borrowFee, coinbase, chain, header, statedb, order, &oldestOrder, maxTradedQuantity)
		if err != nil && err == lendingstate.ErrQuantityTradeTooSmall && tradedQuantity != nil && tradedQuantity.Sign() >= 0 {
			if tradedQuantity.Cmp(maxTradedQuantity) == 0 {
				if quantityToTrade.Cmp(amount) == 0 { // reject Taker & maker
					rejects = append(rejects, order)
					quantityToTrade = lendingstate.Zero
					rejects = append(rejects, &oldestOrder)
					err = lendingStateDB.CancelLendingOrder(lendingOrderBook, &oldestOrder)
					log.Debug("Reject order maker", "lending id ", oldestOrder.LendingId, "err", err)
					if err != nil {
						return nil, nil, nil, err
					}
					break
				} else if quantityToTrade.Cmp(amount) < 0 { // reject Taker
					rejects = append(rejects, order)
					quantityToTrade = lendingstate.Zero
					break
				} else { // reject maker
					rejects = append(rejects, &oldestOrder)
					err = lendingStateDB.CancelLendingOrder(lendingOrderBook, &oldestOrder)
					log.Debug("Reject order maker", "lending id ", oldestOrder.LendingId, "err", err)
					if err != nil {
						return nil, nil, nil, err
					}
					continue
				}
			} else {
				if rejectMaker { // reject maker
					rejects = append(rejects, &oldestOrder)
					err = lendingStateDB.CancelLendingOrder(lendingOrderBook, &oldestOrder)
					log.Debug("Reject order maker", "lending id ", oldestOrder.LendingId, "err", err)
					if err != nil {
						return nil, nil, nil, err
					}
					continue
				} else { // reject Taker
					rejects = append(rejects, order)
					quantityToTrade = lendingstate.Zero
					break
				}
			}
		} else if err != nil {
			return nil, nil, nil, err
		}
		if tradedQuantity.Sign() == 0 && !rejectMaker {
			log.Debug("Reject order Taker ", "tradedQuantity", tradedQuantity, "rejectMaker", rejectMaker)
			rejects = append(rejects, order)
			quantityToTrade = lendingstate.Zero
			break
		}
		if tradedQuantity.Sign() > 0 {
			quantityToTrade = lendingstate.Sub(quantityToTrade, tradedQuantity)
			err := lendingStateDB.SubAmountLendingItem(lendingOrderBook, orderId, Interest, tradedQuantity, side)
			if err != nil {
				log.Warn("processOrderList SubAmountLendingItem", "err", err, "lendingOrderBook", lendingOrderBook, "orderId", orderId, "Interest", *Interest, "tradedQuantity", *tradedQuantity, "side", side)
			}
			log.Debug("Update quantity for orderId", "orderId", orderId.Hex())
			log.Debug("LEND", "lendingOrderBook", lendingOrderBook.Hex(), "Taker Interest", Interest, "maker Interest", order.Interest, "Amount", tradedQuantity, "orderId", orderId, "side", side)
			tradingId := lendingStateDB.GetTradeNonce(lendingOrderBook) + 1
			liquidationTime := header.Time.Uint64() + order.Term
			liquidationPrice := new(big.Int).Mul(collateralPrice, liquidationRate)
			liquidationPrice = new(big.Int).Div(liquidationPrice, depositRate)
			lendingTrade := lendingstate.LendingTrade{
				TradeId:                tradingId,
				Term:                   oldestOrder.Term,
				LendingToken:           oldestOrder.LendingToken,
				CollateralToken:        collateralToken,
				Amount:                 tradedQuantity,
				LiquidationTime:        liquidationTime,
				LiquidationPrice:       liquidationPrice,
				Interest:               oldestOrder.Interest.Uint64(),
				DepositRate:            depositRate,
				LiquidationRate:        liquidationRate,
				RecallRate:             recallRate,
				CollateralLockedAmount: collateralLockedAmount,
			}
			lendingTrade.Status = lendingstate.TradeStatusOpen
			lendingTrade.TakerOrderSide = order.Side
			lendingTrade.TakerOrderType = order.Type
			lendingTrade.MakerOrderType = oldestOrder.Type
			lendingTrade.InvestingFee = lendingstate.Zero // current design: no investing fee
			lendingTrade.CollateralPrice = collateralPrice

			if order.Side == lendingstate.Borrowing {
				// taker is a borrower
				lendingTrade.BorrowingOrderHash = order.Hash
				lendingTrade.InvestingOrderHash = oldestOrder.Hash
				lendingTrade.BorrowingRelayer = order.Relayer
				lendingTrade.InvestingRelayer = oldestOrder.Relayer
				lendingTrade.Borrower = order.UserAddress
				lendingTrade.Investor = oldestOrder.UserAddress
				lendingTrade.AutoTopUp = order.AutoTopUp
				// fee
				if settleBalanceResult != nil {
					lendingTrade.BorrowingFee = settleBalanceResult.Taker.Fee
				}
			} else if order.Side == lendingstate.Investing {
				// taker is an investor
				lendingTrade.BorrowingOrderHash = oldestOrder.Hash
				lendingTrade.InvestingOrderHash = order.Hash
				lendingTrade.BorrowingRelayer = oldestOrder.Relayer
				lendingTrade.InvestingRelayer = order.Relayer
				lendingTrade.Borrower = oldestOrder.UserAddress
				lendingTrade.Investor = order.UserAddress
				lendingTrade.AutoTopUp = oldestOrder.AutoTopUp
				// fee
				if settleBalanceResult != nil {
					lendingTrade.BorrowingFee = settleBalanceResult.Maker.Fee
				}
			}
			lendingTrade.Hash = lendingTrade.ComputeHash()

			log.Debug("InsertTradingItem", "lendingOrderBook", lendingOrderBook.Hex(), "tradingId", tradingId, "lendingTrade", lendingTrade.Amount)
			lendingStateDB.InsertTradingItem(lendingOrderBook, tradingId, lendingTrade)
			log.Debug("InsertLiquidationTime", "lendingOrderBook", lendingOrderBook.Hex(), "tradingId", tradingId, "liquidationTime", liquidationTime)
			lendingStateDB.InsertLiquidationTime(lendingOrderBook, new(big.Int).SetUint64(liquidationTime), tradingId)
			log.Debug("SetTradeNonce", "lendingOrderBook", lendingOrderBook.Hex(), "nonce", tradingId+1)
			lendingStateDB.SetTradeNonce(lendingOrderBook, tradingId)
			log.Debug("InsertLiquidationPrice", "TradingOrderBookHash", tradingstate.GetTradingOrderBookHash(collateralToken, order.LendingToken).Hex(), "tradingId", tradingId, "lendingOrderBook", lendingOrderBook.Hex(), "liquidationPrice", liquidationPrice)
			tradingStateDb.InsertLiquidationPrice(tradingstate.GetTradingOrderBookHash(collateralToken, order.LendingToken), liquidationPrice, lendingOrderBook, tradingId)
			trades = append(trades, &lendingTrade)
		}
		if rejectMaker {
			rejects = append(rejects, &oldestOrder)
			err := lendingStateDB.CancelLendingOrder(lendingOrderBook, &oldestOrder)
			if err != nil {
				return nil, nil, nil, err
			}
		}
	}
	return quantityToTrade, trades, rejects, nil
}

func (l *Lending) getLendQuantity(
	lendTokenXDCPrice,
	collateralPrice,
	depositRate,
	borrowFee *big.Int,
	coinbase common.Address, chain consensus.ChainContext, header *types.Header, statedb *state.StateDB, takerOrder *lendingstate.LendingItem, makerOrder *lendingstate.LendingItem, quantityToTrade *big.Int) (*big.Int, *big.Int, bool, *lendingstate.LendingSettleBalance, error) {
	if collateralPrice == nil || collateralPrice.Sign() == 0 {
		if takerOrder.Side == lendingstate.Borrowing {
			log.Debug("Reject lending order taker , can not found  collateral price ")
			return lendingstate.Zero, lendingstate.Zero, false, nil, nil
		} else {
			log.Debug("Reject lending order maker , can not found  collateral price ")
			return lendingstate.Zero, lendingstate.Zero, true, nil, nil
		}
	}
	LendingTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, makerOrder.LendingToken)
	if err != nil || LendingTokenDecimal.Sign() == 0 {
		return lendingstate.Zero, lendingstate.Zero, false, nil, fmt.Errorf("fail to get tokenDecimal: Token: %v . Err: %v", makerOrder.LendingToken.String(), err)
	}
	collateralToken := makerOrder.CollateralToken
	if takerOrder.Side == lendingstate.Borrowing {
		collateralToken = takerOrder.CollateralToken
	}
	collateralTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, collateralToken)
	if err != nil || collateralTokenDecimal.Sign() == 0 {
		return lendingstate.Zero, lendingstate.Zero, false, nil, fmt.Errorf("fail to get tokenDecimal: Token: %v . Err: %v", collateralToken.String(), err)
	}
	if takerOrder.Relayer == makerOrder.Relayer {
		if err := lendingstate.CheckRelayerFee(takerOrder.Relayer, new(big.Int).Mul(common.RelayerLendingFee, big.NewInt(2)), statedb); err != nil {
			log.Debug("Reject order Taker Exchnage = Maker Exchange , relayer not enough fee ", "err", err)
			return lendingstate.Zero, lendingstate.Zero, false, nil, nil
		}
	} else {
		if err := lendingstate.CheckRelayerFee(takerOrder.Relayer, common.RelayerLendingFee, statedb); err != nil {
			log.Debug("Reject order Taker , relayer not enough fee ", "err", err)
			return lendingstate.Zero, lendingstate.Zero, false, nil, nil
		}
		if err := lendingstate.CheckRelayerFee(makerOrder.Relayer, common.RelayerLendingFee, statedb); err != nil {
			log.Debug("Reject order maker , relayer not enough fee ", "err", err)
			return lendingstate.Zero, lendingstate.Zero, true, nil, nil
		}
	}
	var takerBalance, makerBalance *big.Int
	var lendToken common.Address
	switch takerOrder.Side {
	case lendingstate.Borrowing:
		takerBalance = lendingstate.GetTokenBalance(takerOrder.UserAddress, takerOrder.CollateralToken, statedb)
		makerBalance = lendingstate.GetTokenBalance(makerOrder.UserAddress, takerOrder.LendingToken, statedb)
		lendToken = takerOrder.LendingToken
	case lendingstate.Investing:
		takerBalance = lendingstate.GetTokenBalance(takerOrder.UserAddress, makerOrder.LendingToken, statedb)
		makerBalance = lendingstate.GetTokenBalance(makerOrder.UserAddress, makerOrder.CollateralToken, statedb)
		lendToken = makerOrder.LendingToken
	default:
		takerBalance = big.NewInt(0)
		makerBalance = big.NewInt(0)
	}
	quantity, rejectMaker := GetLendQuantity(takerOrder.Side, collateralTokenDecimal, depositRate, collateralPrice, takerBalance, makerBalance, quantityToTrade)
	log.Debug("GetLendQuantity", "side", takerOrder.Side, "takerBalance", takerBalance, "makerBalance", makerBalance, "LendingToken", makerOrder.LendingToken, "CollateralToken", collateralToken, "quantity", quantity, "rejectMaker", rejectMaker)
	if quantity.Sign() > 0 {
		// Apply Match Order
		isXDCXLendingFork := chain.Config().IsTIPXDCXLending(header.Number)
		settleBalanceResult, err := lendingstate.GetSettleBalance(isXDCXLendingFork, takerOrder.Side, lendTokenXDCPrice, collateralPrice, depositRate, borrowFee, lendToken, collateralToken, LendingTokenDecimal, collateralTokenDecimal, quantity)
		log.Debug("GetSettleBalance", "settleBalanceResult", settleBalanceResult, "err", err)
		if err == nil {
			err = DoSettleBalance(coinbase, takerOrder, makerOrder, settleBalanceResult, statedb)
		}
		if err != nil {
			return quantity, lendingstate.Zero, rejectMaker, nil, err
		}
		return quantity, settleBalanceResult.CollateralLockedAmount, rejectMaker, settleBalanceResult, nil
	}
	return quantity, lendingstate.Zero, rejectMaker, nil, nil
}

func GetLendQuantity(takerSide string, collateralTokenDecimal *big.Int, depositRate *big.Int, collateralPrice *big.Int, takerBalance *big.Int, makerBalance *big.Int, quantityToLend *big.Int) (*big.Int, bool) {
	if takerSide == lendingstate.Borrowing {
		// taker = Borrower : takerOutTotal = CollateralLockedAmount = quantityToLend * collateral Token Decimal/ CollateralPrice  * deposit rate
		takerOutTotal := new(big.Int).Mul(quantityToLend, collateralTokenDecimal)
		takerOutTotal = new(big.Int).Mul(takerOutTotal, depositRate)
		takerOutTotal = new(big.Int).Div(takerOutTotal, big.NewInt(100)) // depositRate in percentage format
		takerOutTotal = new(big.Int).Div(takerOutTotal, collateralPrice)
		// Investor : makerOutTotal = quantityToLend
		makerOutTotal := quantityToLend
		if takerBalance.Cmp(takerOutTotal) >= 0 && makerBalance.Cmp(makerOutTotal) >= 0 {
			return quantityToLend, false
		} else if takerBalance.Cmp(takerOutTotal) < 0 && makerBalance.Cmp(makerOutTotal) >= 0 {
			newQuantityLend := new(big.Int).Mul(takerBalance, collateralPrice)
			newQuantityLend = new(big.Int).Mul(newQuantityLend, big.NewInt(100)) // depositRate in percentage format
			newQuantityLend = new(big.Int).Div(newQuantityLend, depositRate)
			newQuantityLend = new(big.Int).Div(newQuantityLend, collateralTokenDecimal)
			if newQuantityLend.Sign() == 0 {
				log.Debug("Reject lending order Taker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "takerOutTotal", takerOutTotal)
			}
			return newQuantityLend, false
		} else if takerBalance.Cmp(takerOutTotal) >= 0 && makerBalance.Cmp(makerOutTotal) < 0 {
			log.Debug("Reject lending order maker , not enough balance ", "makerBalance", makerBalance, " makerOutTotal", makerOutTotal)
			return makerBalance, true
		} else {
			// takerBalance.Cmp(takerOutTotal) < 0 && makerBalance.Cmp(makerOutTotal) < 0
			newQuantityLend := new(big.Int).Mul(takerBalance, collateralPrice)
			newQuantityLend = new(big.Int).Mul(newQuantityLend, big.NewInt(100)) // depositRate in percentage format
			newQuantityLend = new(big.Int).Div(newQuantityLend, depositRate)
			newQuantityLend = new(big.Int).Div(newQuantityLend, collateralTokenDecimal)
			if newQuantityLend.Cmp(makerBalance) <= 0 {
				if newQuantityLend.Sign() == 0 {
					log.Debug("Reject lending order Taker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "makerBalance", makerBalance, " newQuantityLend ", newQuantityLend)
				}
				return newQuantityLend, false
			}
			log.Debug("Reject lending order maker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "makerBalance", makerBalance, " newQuantityLend ", newQuantityLend)
			return makerBalance, true
		}
	} else {
		// maker =  Borrower : makerOutTotal = CollateralLockedAmount = quantityToLend * collateral Token Decimal / CollateralPrice  * deposit rate
		makerOutTotal := new(big.Int).Mul(quantityToLend, collateralTokenDecimal)
		makerOutTotal = new(big.Int).Mul(makerOutTotal, depositRate)
		makerOutTotal = new(big.Int).Div(makerOutTotal, big.NewInt(100)) // depositRate in percentage format
		makerOutTotal = new(big.Int).Div(makerOutTotal, collateralPrice)
		// Investor : makerOutTotal = quantityToLend
		takerOutTotal := quantityToLend
		if takerBalance.Cmp(takerOutTotal) >= 0 && makerBalance.Cmp(makerOutTotal) >= 0 {
			return quantityToLend, false
		} else if takerBalance.Cmp(takerOutTotal) < 0 && makerBalance.Cmp(makerOutTotal) >= 0 {
			if takerBalance.Sign() == 0 {
				log.Debug("Reject lending order Taker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "takerOutTotal", takerOutTotal)
			}
			return takerBalance, false
		} else if takerBalance.Cmp(takerOutTotal) >= 0 && makerBalance.Cmp(makerOutTotal) < 0 {
			newQuantityLend := new(big.Int).Mul(makerBalance, collateralPrice)
			newQuantityLend = new(big.Int).Mul(newQuantityLend, big.NewInt(100)) // depositRate in percentage format
			newQuantityLend = new(big.Int).Div(newQuantityLend, depositRate)
			newQuantityLend = new(big.Int).Div(newQuantityLend, collateralTokenDecimal)
			log.Debug("Reject lending order maker , not enough balance ", "makerBalance", makerBalance, " makerOutTotal", makerOutTotal)
			return newQuantityLend, true
		} else {
			// takerBalance.Cmp(takerOutTotal) < 0 && makerBalance.Cmp(makerOutTotal) < 0
			newQuantityLend := new(big.Int).Mul(makerBalance, collateralPrice)
			newQuantityLend = new(big.Int).Mul(newQuantityLend, big.NewInt(100)) // depositRate in percentage format
			newQuantityLend = new(big.Int).Div(newQuantityLend, depositRate)
			newQuantityLend = new(big.Int).Div(newQuantityLend, collateralTokenDecimal)
			if newQuantityLend.Cmp(takerBalance) <= 0 {
				log.Debug("Reject lending order maker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "makerBalance", makerBalance, " newQuantityLend ", newQuantityLend)
				return newQuantityLend, true
			}
			if takerBalance.Sign() == 0 {
				log.Debug("Reject lending order Taker , not enough balance ", "takerSide", takerSide, "takerBalance", takerBalance, "makerBalance", makerBalance, " newQuantityLend ", newQuantityLend)
			}
			return takerBalance, false
		}
	}
}

func DoSettleBalance(coinbase common.Address, takerOrder, makerOrder *lendingstate.LendingItem, settleBalance *lendingstate.LendingSettleBalance, statedb *state.StateDB) error {
	takerExOwner := lendingstate.GetRelayerOwner(takerOrder.Relayer, statedb)
	makerExOwner := lendingstate.GetRelayerOwner(makerOrder.Relayer, statedb)
	matchingFee := big.NewInt(0)
	// masternodes only charge borrower relayer fee
	matchingFee = new(big.Int).Add(matchingFee, common.RelayerLendingFee)

	if takerExOwner.Hash().IsZero() || makerExOwner.Hash().IsZero() {
		return fmt.Errorf("empty echange owner: taker: %v , maker : %v", takerExOwner, makerExOwner)
	}
	mapBalances := map[common.Address]map[common.Address]*big.Int{}
	//Checking balance
	if takerOrder.Side == lendingstate.Borrowing {
		relayerFee, err := lendingstate.CheckSubRelayerFee(takerOrder.Relayer, common.RelayerLendingFee, statedb, map[common.Address]*big.Int{})
		if err != nil {
			return err
		}
		lendingstate.SetSubRelayerFee(takerOrder.Relayer, relayerFee, common.RelayerLendingFee, statedb)
		newTakerInTotal, err := lendingstate.CheckAddTokenBalance(takerOrder.UserAddress, settleBalance.Taker.InTotal, settleBalance.Taker.InToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Taker.InToken] == nil {
			mapBalances[settleBalance.Taker.InToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Taker.InToken][takerOrder.UserAddress] = newTakerInTotal
		newTakerOutTotal, err := lendingstate.CheckSubTokenBalance(takerOrder.UserAddress, settleBalance.Taker.OutTotal, settleBalance.Taker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Taker.OutToken] == nil {
			mapBalances[settleBalance.Taker.OutToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Taker.OutToken][takerOrder.UserAddress] = newTakerOutTotal
		newMakerOutTotal, err := lendingstate.CheckSubTokenBalance(makerOrder.UserAddress, settleBalance.Maker.OutTotal, settleBalance.Maker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Maker.OutToken] == nil {
			mapBalances[settleBalance.Maker.OutToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Maker.OutToken][makerOrder.UserAddress] = newMakerOutTotal
		newTakerFee, err := lendingstate.CheckAddTokenBalance(takerExOwner, settleBalance.Taker.Fee, settleBalance.Taker.InToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		mapBalances[settleBalance.Taker.InToken][takerExOwner] = newTakerFee

		newCollateralTokenLock, err := lendingstate.CheckAddTokenBalance(common.LendingLockAddressBinary, settleBalance.Taker.OutTotal, settleBalance.Taker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		mapBalances[settleBalance.Taker.OutToken][common.LendingLockAddressBinary] = newCollateralTokenLock
	} else {
		relayerFee, err := lendingstate.CheckSubRelayerFee(makerOrder.Relayer, common.RelayerLendingFee, statedb, map[common.Address]*big.Int{})
		if err != nil {
			return err
		}
		lendingstate.SetSubRelayerFee(makerOrder.Relayer, relayerFee, common.RelayerLendingFee, statedb)
		newTakerOutTotal, err := lendingstate.CheckSubTokenBalance(takerOrder.UserAddress, settleBalance.Taker.OutTotal, settleBalance.Taker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Taker.OutToken] == nil {
			mapBalances[settleBalance.Taker.OutToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Taker.OutToken][takerOrder.UserAddress] = newTakerOutTotal
		newMakerInTotal, err := lendingstate.CheckAddTokenBalance(makerOrder.UserAddress, settleBalance.Maker.InTotal, settleBalance.Maker.InToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Maker.InToken] == nil {
			mapBalances[settleBalance.Maker.InToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Maker.InToken][makerOrder.UserAddress] = newMakerInTotal
		newMakerOutTotal, err := lendingstate.CheckSubTokenBalance(makerOrder.UserAddress, settleBalance.Maker.OutTotal, settleBalance.Maker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		if mapBalances[settleBalance.Maker.OutToken] == nil {
			mapBalances[settleBalance.Maker.OutToken] = map[common.Address]*big.Int{}
		}
		mapBalances[settleBalance.Maker.OutToken][makerOrder.UserAddress] = newMakerOutTotal
		newMakerFee, err := lendingstate.CheckAddTokenBalance(makerExOwner, settleBalance.Maker.Fee, settleBalance.Maker.InToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		mapBalances[settleBalance.Maker.InToken][makerExOwner] = newMakerFee

		newCollateralTokenLock, err := lendingstate.CheckAddTokenBalance(common.LendingLockAddressBinary, settleBalance.Maker.OutTotal, settleBalance.Maker.OutToken, statedb, mapBalances)
		if err != nil {
			return err
		}
		mapBalances[settleBalance.Maker.OutToken][common.LendingLockAddressBinary] = newCollateralTokenLock
	}
	masternodeOwner := statedb.GetOwner(coinbase)
	statedb.AddBalance(masternodeOwner, matchingFee)
	for token, balances := range mapBalances {
		for adrr, value := range balances {
			err := lendingstate.SetTokenBalance(adrr, value, token, statedb)
			if err != nil {
				log.Warn("DoSettleBalance SetTokenBalance", "err", err, "addr", adrr, "value", *value, "token", token)
			}
		}
	}
	return nil
}

func (l *Lending) ProcessCancelOrder(header *types.Header, lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, chain consensus.ChainContext, coinbase common.Address, lendingOrderBook common.Hash, order *lendingstate.LendingItem) (error, bool) {
	originOrder := lendingStateDB.GetLendingOrder(lendingOrderBook, common.BigToHash(new(big.Int).SetUint64(order.LendingId)))
	if originOrder == lendingstate.EmptyLendingOrder {
		return fmt.Errorf("lendingOrder not found. Id: %v. LendToken: %s . Term: %v. CollateralToken: %v", order.LendingId, order.LendingToken.Hex(), order.Term, order.CollateralToken.Hex()), false
	}
	if originOrder.Hash != order.Hash {
		return fmt.Errorf("invalid lending hash. GotHash: %s. ExpectedHash: %s . LendToken: %s . Term: %v. CollateralToken: %v", order.Hash.Hex(), originOrder.Hash.Hex(), order.LendingToken.Hex(), order.Term, order.CollateralToken.Hex()), false
	}
	if originOrder.UserAddress != order.UserAddress {
		return fmt.Errorf("userAddress doesnot match. Expected: %s . Got: %s", originOrder.UserAddress.Hex(), order.UserAddress.Hex()), false
	}
	if err := lendingstate.CheckRelayerFee(originOrder.Relayer, common.RelayerLendingCancelFee, statedb); err != nil {
		log.Debug("Relayer not enough fee when cancel order", "err", err)
		return nil, true
	}
	lendTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, originOrder.LendingToken)
	if err != nil || lendTokenDecimal == nil || lendTokenDecimal.Sign() <= 0 {
		log.Debug("Fail to get tokenDecimal ", "Token", originOrder.LendingToken.String(), "err", err)
		return err, false
	}
	var tokenBalance *big.Int
	switch originOrder.Side {
	case lendingstate.Investing:
		tokenBalance = lendingstate.GetTokenBalance(originOrder.UserAddress, originOrder.LendingToken, statedb)
	case lendingstate.Borrowing:
		tokenBalance = lendingstate.GetTokenBalance(originOrder.UserAddress, originOrder.CollateralToken, statedb)
	default:
		log.Debug("Not found order side", "Side", originOrder.Side)
		return nil, true
	}
	log.Debug("ProcessCancelOrder", "LendingToken", originOrder.LendingToken, "CollateralToken", originOrder.CollateralToken, "makerInterest", originOrder.Interest, "lendTokenDecimal", lendTokenDecimal, "quantity", originOrder.Quantity)
	collateralPrice := common.BasePrice
	collateralTokenDecimal := common.BasePrice
	if originOrder.Side == lendingstate.Borrowing {
		_, collateralPrice, err = l.GetCollateralPrices(header, chain, statedb, tradingStateDb, originOrder.CollateralToken, originOrder.LendingToken)
		if err != nil || collateralPrice == nil || collateralPrice.Sign() <= 0 {
			return err, false
		}
		collateralTokenDecimal, err = l.XDCx.GetTokenDecimal(chain, statedb, originOrder.CollateralToken)
		if err != nil || collateralTokenDecimal == nil || collateralTokenDecimal.Sign() <= 0 {
			log.Debug("Fail to get tokenDecimal ", "Token", originOrder.LendingToken.String(), "err", err)
			return err, false
		}
	}
	feeRate := lendingstate.GetFee(statedb, originOrder.Relayer)
	var tokenCancelFee, tokenPriceInXDC *big.Int
	if !chain.Config().IsTIPXDCXCancellationFee(header.Number) {
		tokenCancelFee = getCancelFeeV1(collateralTokenDecimal, collateralPrice, feeRate, &originOrder)
		tokenPriceInXDC = common.Big0
	} else {
		tokenCancelFee, tokenPriceInXDC = l.getCancelFee(chain, statedb, tradingStateDb, &originOrder, feeRate)
	}

	if tokenBalance.Cmp(tokenCancelFee) < 0 {
		log.Debug("User not enough balance when cancel order", "Side", originOrder.Side, "Interest", originOrder.Interest, "Quantity", originOrder.Quantity, "balance", tokenBalance, "fee", tokenCancelFee)
		return nil, true
	}
	err = lendingStateDB.CancelLendingOrder(lendingOrderBook, &originOrder)
	if err != nil {
		log.Debug("Error when cancel order", "order", &originOrder)
		return err, false
	}
	// relayers pay XDC for masternode
	lendingstate.SubRelayerFee(originOrder.Relayer, common.RelayerLendingCancelFee, statedb)
	masternodeOwner := statedb.GetOwner(coinbase)
	statedb.AddBalance(masternodeOwner, common.RelayerLendingCancelFee)
	relayerOwner := lendingstate.GetRelayerOwner(originOrder.Relayer, statedb)
	switch originOrder.Side {
	case lendingstate.Investing:
		// users pay token for relayer
		err := lendingstate.SubTokenBalance(originOrder.UserAddress, tokenCancelFee, originOrder.LendingToken, statedb)
		if err != nil {
			log.Warn("ProcessCancelOrder SubTokenBalance", "err", err, "originOrder.UserAddress", originOrder.UserAddress, "tokenCancelFee", *tokenCancelFee, "originOrder.LendingToken", originOrder.LendingToken)
		}
		err = lendingstate.AddTokenBalance(relayerOwner, tokenCancelFee, originOrder.LendingToken, statedb)
		if err != nil {
			log.Warn("ProcessCancelOrder AddTokenBalance", "err", err, "relayerOwner", relayerOwner, "tokenCancelFee", *tokenCancelFee, "originOrder.LendingToken", originOrder.LendingToken)
		}
	case lendingstate.Borrowing:
		// users pay token for relayer
		err := lendingstate.SubTokenBalance(originOrder.UserAddress, tokenCancelFee, originOrder.CollateralToken, statedb)
		if err != nil {
			log.Warn("ProcessCancelOrder SubTokenBalance", "err", err, "originOrder.UserAddress", originOrder.UserAddress, "tokenCancelFee", *tokenCancelFee, "originOrder.CollateralToken", originOrder.CollateralToken)
		}
		err = lendingstate.AddTokenBalance(relayerOwner, tokenCancelFee, originOrder.CollateralToken, statedb)
		if err != nil {
			log.Warn("ProcessCancelOrder AddTokenBalance", "err", err, "relayerOwner", relayerOwner, "tokenCancelFee", *tokenCancelFee, "originOrder.CollateralToken", originOrder.CollateralToken)
		}
	default:
	}
	extraData, _ := json.Marshal(struct {
		CancelFee       string
		TokenPriceInXDC string
	}{
		CancelFee:       tokenCancelFee.Text(10),
		TokenPriceInXDC: tokenPriceInXDC.Text(10),
	})
	order.ExtraData = string(extraData)

	return nil, false
}

func (l *Lending) ProcessTopUp(lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, order *lendingstate.LendingItem) (bool, *lendingstate.LendingTrade, error) {
	lendingTradeId := common.Uint64ToHash(order.LendingTradeId)
	lendingBook := lendingstate.GetLendingOrderBookHash(order.LendingToken, order.Term)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeId)
	if lendingTrade == lendingstate.EmptyLendingTrade {
		return true, nil, fmt.Errorf("process deposit for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId.Hex())
	}
	if order.UserAddress != lendingTrade.Borrower {
		return true, nil, fmt.Errorf("ProcessTopUp: invalid userAddress . UserAddress: %s . Borrower: %s", order.UserAddress.Hex(), lendingTrade.Borrower.Hex())
	}
	if order.Relayer != lendingTrade.BorrowingRelayer {
		return true, nil, fmt.Errorf("ProcessTopUp: invalid relayerAddress . Got: %s . Expect: %s", order.Relayer.Hex(), lendingTrade.BorrowingRelayer.Hex())
	}
	if order.Quantity.Sign() <= 0 || lendingTrade.TradeId != lendingTradeId.Big().Uint64() {
		log.Debug("ProcessTopUp: invalid quantity", "Quantity", order.Quantity, "lendingTradeId", lendingTradeId.Hex())
		return true, nil, nil
	}
	return l.ProcessTopUpLendingTrade(lendingStateDB, statedb, tradingStateDb, lendingTradeId, lendingBook, order.Quantity)
}

// return hash: hash of lendingTrade
func (l *Lending) ProcessRepay(header *types.Header, chain consensus.ChainContext, lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingstateDB *tradingstate.TradingStateDB, lendingBook common.Hash, order *lendingstate.LendingItem) (trade *lendingstate.LendingTrade, err error) {
	lendingTradeId := order.LendingTradeId
	lendingTradeIdHash := common.Uint64ToHash(lendingTradeId)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeIdHash)
	if lendingTrade == lendingstate.EmptyLendingTrade || lendingTrade.TradeId != lendingTradeIdHash.Big().Uint64() {
		return nil, fmt.Errorf("ProcessRepay for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId)
	}
	if order.UserAddress != lendingTrade.Borrower {
		return nil, fmt.Errorf("ProcessRepay: invalid userAddress . UserAddress: %s . Borrower: %s", order.UserAddress.Hex(), lendingTrade.Borrower.Hex())
	}
	if order.Relayer != lendingTrade.BorrowingRelayer {
		return nil, fmt.Errorf("ProcessRepay: invalid relayerAddress . Got: %s . Expect: %s", order.Relayer.Hex(), lendingTrade.BorrowingRelayer.Hex())
	}
	return l.ProcessRepayLendingTrade(header, chain, lendingStateDB, statedb, tradingstateDB, lendingBook, lendingTradeId)
}

// return liquidatedTrade
func (l *Lending) LiquidationExpiredTrade(header *types.Header, chain consensus.ChainContext, lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingstateDB *tradingstate.TradingStateDB, lendingBook common.Hash, lendingTradeId uint64) (*lendingstate.LendingTrade, error) {
	lendingTradeIdHash := common.Uint64ToHash(lendingTradeId)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeIdHash)
	if lendingTrade.TradeId != lendingTradeId {
		return nil, fmt.Errorf("Lending Trade Id not found : %d ", lendingTradeId)
	}
	repayAmount := lendingTrade.CollateralLockedAmount

	_, collateralPrice, err := l.GetCollateralPrices(header, chain, statedb, tradingstateDB, lendingTrade.CollateralToken, lendingTrade.LendingToken)
	if err != nil || collateralPrice == nil || collateralPrice.Sign() <= 0 {
		// if cannot get collateralPrice, liquidate all collateral
		log.Error("LiquidationExpiredTrade: cannot get collateralPrice", "err", err)
	} else {
		// repayAmount= CollateralLockedAmount * LiquidationPrice / collateralPrice + interestAmount
		repayAmount = new(big.Int).Mul(lendingTrade.CollateralLockedAmount, lendingTrade.LiquidationPrice)
		repayAmount = new(big.Int).Div(repayAmount, collateralPrice)
		_, liquidationRate, _ := lendingstate.GetCollateralDetail(statedb, lendingTrade.CollateralToken)
		collateralAmount := new(big.Int).Mul(repayAmount, big.NewInt(100))
		collateralAmount = new(big.Int).Div(collateralAmount, liquidationRate)
		totalCollateralAmount := lendingstate.CalculateTotalRepayValue(header.Time.Uint64(), lendingTrade.LiquidationTime, lendingTrade.Term, lendingTrade.Interest, collateralAmount)
		interestAmount := new(big.Int).Sub(totalCollateralAmount, collateralAmount)
		repayAmount = new(big.Int).Add(repayAmount, interestAmount)
	}

	recallAmount := common.Big0
	if repayAmount.Cmp(lendingTrade.CollateralLockedAmount) < 0 {
		recallAmount = new(big.Int).Sub(lendingTrade.CollateralLockedAmount, repayAmount)
		err := lendingstate.AddTokenBalance(lendingTrade.Borrower, recallAmount, lendingTrade.CollateralToken, statedb)
		if err != nil {
			log.Warn("LiquidationExpiredTrade AddTokenBalance", "err", err, "lendingTrade.Borrower", lendingTrade.Borrower, "recallAmount", *recallAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
		}
	} else {
		repayAmount = lendingTrade.CollateralLockedAmount
	}
	err = lendingstate.SubTokenBalance(common.LendingLockAddressBinary, lendingTrade.CollateralLockedAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("LiquidationExpiredTrade SubTokenBalance", "err", err, "LendingLockAddress", common.LendingLockAddress, "lendingTrade.CollateralLockedAmount", *lendingTrade.CollateralLockedAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	err = lendingstate.AddTokenBalance(lendingTrade.Investor, repayAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("LiquidationExpiredTrade AddTokenBalance", "err", err, "lendingTrade.Investor", lendingTrade.Investor, "repayAmount", repayAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}

	err = lendingStateDB.RemoveLiquidationTime(lendingBook, lendingTradeId, lendingTrade.LiquidationTime)
	if err != nil {
		log.Debug("LiquidationTrade RemoveLiquidationTime", "err", err)
		return nil, err
	}
	err = tradingstateDB.RemoveLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), lendingTrade.LiquidationPrice, lendingBook, lendingTradeId)
	if err != nil {
		log.Debug("LiquidationTrade RemoveLiquidationPrice", "err", err)
		return nil, err
	}
	err = lendingStateDB.CancelLendingTrade(lendingBook, lendingTradeId)
	if err != nil {
		log.Debug("LiquidationTrade CancelLendingTrade", "err", err)
		return nil, err
	}
	// update liquidationData mongodb
	liquidationData := lendingstate.LiquidationData{
		RecallAmount:      recallAmount,
		LiquidationAmount: repayAmount,
		CollateralPrice:   collateralPrice,
		Reason:            lendingstate.LiquidatedByTime,
	}
	extraData, _ := json.Marshal(liquidationData)
	lendingTrade.ExtraData = string(extraData)
	return &lendingTrade, nil
}

// return liquidatedTrade
func (l *Lending) LiquidationTrade(lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingstateDB *tradingstate.TradingStateDB, lendingBook common.Hash, lendingTradeId uint64) (*lendingstate.LendingTrade, error) {
	lendingTradeIdHash := common.Uint64ToHash(lendingTradeId)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeIdHash)
	if lendingTrade.TradeId != lendingTradeId {
		return nil, fmt.Errorf("Lending Trade Id not found : %d ", lendingTradeId)
	}
	err := lendingstate.SubTokenBalance(common.LendingLockAddressBinary, lendingTrade.CollateralLockedAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("LiquidationTrade SubTokenBalance", "err", err, "LendingLockAddress", common.LendingLockAddress, "lendingTrade.CollateralLockedAmount", *lendingTrade.CollateralLockedAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	err = lendingstate.AddTokenBalance(lendingTrade.Investor, lendingTrade.CollateralLockedAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("LiquidationTrade AddTokenBalance", "err", err, "lendingTrade.Investor", lendingTrade.Investor, "lendingTrade.CollateralLockedAmount", *lendingTrade.CollateralLockedAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	err = lendingStateDB.RemoveLiquidationTime(lendingBook, lendingTradeId, lendingTrade.LiquidationTime)
	if err != nil {
		log.Debug("LiquidationTrade RemoveLiquidationTime", "err", err)
		return nil, err
	}
	err = tradingstateDB.RemoveLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), lendingTrade.LiquidationPrice, lendingBook, lendingTradeId)
	if err != nil {
		log.Debug("LiquidationTrade RemoveLiquidationPrice", "err", err)
		return nil, err
	}
	err = lendingStateDB.CancelLendingTrade(lendingBook, lendingTradeId)
	if err != nil {
		log.Debug("LiquidationTrade CancelLendingTrade", "err", err)
		return nil, err
	}
	return &lendingTrade, nil
}

// cancellation fee = 1/10 borrowing fee
// deprecated after hardfork at TIPXDCXCancellationFee
func getCancelFeeV1(collateralTokenDecimal *big.Int, collateralPrice, borrowFee *big.Int, order *lendingstate.LendingItem) *big.Int {
	var cancelFee *big.Int
	if order.Side == lendingstate.Investing {
		// cancel fee = quantityToLend*borrowFee/LendingCancelFee
		cancelFee = new(big.Int).Mul(order.Quantity, borrowFee)
		cancelFee = new(big.Int).Div(cancelFee, common.XDCXBaseCancelFee)
	} else {
		//Fee = quantityToLend * collateralTokenDecimal/collateralPrice *borrowFee/LendingCancelFee
		cancelFee = new(big.Int).Mul(order.Quantity, collateralTokenDecimal)
		cancelFee = new(big.Int).Mul(cancelFee, borrowFee)
		cancelFee = new(big.Int).Div(cancelFee, collateralPrice)
		cancelFee = new(big.Int).Div(cancelFee, common.XDCXBaseCancelFee)
	}
	return cancelFee
}

// return tokenQuantity, tokenPriceInXDC
func (l *Lending) getCancelFee(chain consensus.ChainContext, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, order *lendingstate.LendingItem, feeRate *big.Int) (*big.Int, *big.Int) {
	if feeRate == nil || feeRate.Sign() == 0 {
		return common.Big0, common.Big0
	}
	var cancelFee, tokenPriceInXDC *big.Int
	var err error
	if order.Side == lendingstate.Investing {
		cancelFee, tokenPriceInXDC, err = l.XDCx.ConvertXDCToToken(chain, statedb, tradingStateDb, order.LendingToken, common.RelayerLendingCancelFee)
	} else {
		cancelFee, tokenPriceInXDC, err = l.XDCx.ConvertXDCToToken(chain, statedb, tradingStateDb, order.CollateralToken, common.RelayerLendingCancelFee)
	}
	if err != nil {
		return common.Big0, common.Big0
	}
	return cancelFee, tokenPriceInXDC
}

func (l *Lending) GetMediumTradePriceBeforeEpoch(chain consensus.ChainContext, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, baseToken common.Address, quoteToken common.Address) (*big.Int, error) {
	price := tradingStateDb.GetMediumPriceBeforeEpoch(tradingstate.GetTradingOrderBookHash(baseToken, quoteToken))
	if price != nil && price.Sign() > 0 {
		log.Debug("getMediumTradePriceBeforeEpoch", "baseToken", baseToken.Hex(), "quoteToken", quoteToken.Hex(), "price", price)
		return price, nil
	} else {
		inversePrice := tradingStateDb.GetMediumPriceBeforeEpoch(tradingstate.GetTradingOrderBookHash(quoteToken, baseToken))
		log.Debug("getMediumTradePriceBeforeEpoch", "baseToken", baseToken.Hex(), "quoteToken", quoteToken.Hex(), "inversePrice", inversePrice)
		if inversePrice != nil && inversePrice.Sign() > 0 {
			quoteTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, quoteToken)
			if err != nil || quoteTokenDecimal.Sign() == 0 {
				return nil, fmt.Errorf("fail to get tokenDecimal: Token: %v . Err: %v", quoteToken.String(), err)
			}
			baseTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, baseToken)
			if err != nil || baseTokenDecimal.Sign() == 0 {
				return nil, fmt.Errorf("fail to get tokenDecimal: Token: %v . Err: %v", baseToken, err)
			}
			price = new(big.Int).Mul(baseTokenDecimal, quoteTokenDecimal)
			price = new(big.Int).Div(price, inversePrice)
			log.Debug("getMediumTradePriceBeforeEpoch", "baseToken", baseToken.Hex(), "quoteToken", quoteToken.Hex(), "baseTokenDecimal", baseTokenDecimal, "quoteTokenDecimal", quoteTokenDecimal, "inversePrice", inversePrice)
			return price, nil
		}
	}
	return nil, nil
}

// LendToken and CollateralToken must meet at least one of following conditions
// - Have direct pair in XDCX: lendToken/CollateralToken or CollateralToken/LendToken
// - Have pairs with XDC:
// -  lendToken/XDC and CollateralToken/XDC
// -  XDC/lendToken and XDC/CollateralToken
func (l *Lending) GetCollateralPrices(header *types.Header, chain consensus.ChainContext, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, collateralToken common.Address, lendingToken common.Address) (*big.Int, *big.Int, error) {
	// lendTokenXDCPrice: price of ticker lendToken/XDC
	// collateralXDCPrice: price of ticker collateralToken/XDC
	// collateralPrice: price of ticker collateralToken/lendToken

	collateralPriceFromContract, updatedBlock := lendingstate.GetCollateralPrice(statedb, collateralToken, lendingToken)
	collateralPriceUpdatedFromContract := updatedBlock.Uint64()/chain.Config().XDPoS.Epoch == header.Number.Uint64()/chain.Config().XDPoS.Epoch

	lendTokenXDCPrice, err := l.GetXDCBasePrices(header, chain, statedb, tradingStateDb, lendingToken)
	if err != nil {
		return nil, nil, err
	}
	if collateralPriceUpdatedFromContract {
		log.Debug("Getting collateral/lending token price from contract", "price", collateralPriceFromContract)
		return lendTokenXDCPrice, collateralPriceFromContract, nil
	}
	lendingTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, lendingToken)
	log.Debug("GetTokenDecimal", "lendingToken", lendingToken, "err", err)
	if err != nil || lendingTokenDecimal == nil || lendingTokenDecimal.Sign() == 0 {
		return nil, nil, err
	}
	collateralTokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, collateralToken)
	log.Debug("GetTokenDecimal", "collateralToken", collateralToken, "err", err)
	if err != nil || collateralTokenDecimal == nil || collateralTokenDecimal.Sign() == 0 {
		return nil, nil, err
	}
	var collateralPrice *big.Int
	inverseCollateralPriceFromContract, updatedBlock := lendingstate.GetCollateralPrice(statedb, lendingToken, collateralToken)
	inverseCollateralPriceUpdatedFromContract := updatedBlock.Uint64()/chain.Config().XDPoS.Epoch == header.Number.Uint64()/chain.Config().XDPoS.Epoch
	if inverseCollateralPriceUpdatedFromContract {
		log.Debug("Getting lending/collateral token price from contract", "price", inverseCollateralPriceFromContract)
		collateralPrice = new(big.Int).Mul(lendingTokenDecimal, collateralTokenDecimal)
		collateralPrice = new(big.Int).Div(collateralPrice, inverseCollateralPriceFromContract)
		return lendTokenXDCPrice, collateralPrice, nil
	}
	// if contract doesn't provide any price information
	// getting price from pair in XDCx
	lastAveragePrice, err := l.GetMediumTradePriceBeforeEpoch(chain, statedb, tradingStateDb, collateralToken, lendingToken)
	if err != nil {
		return nil, nil, err
	}
	if lastAveragePrice != nil && lastAveragePrice.Sign() > 0 {
		log.Debug("Getting collateral/lending from direct pair in XDCx", "lendToken", lendingToken.Hex(), "collateralToken", collateralToken.Hex(), "price", lastAveragePrice)
		return lendTokenXDCPrice, lastAveragePrice, nil
	}
	collateralXDCPrice, err := l.GetXDCBasePrices(header, chain, statedb, tradingStateDb, collateralToken)
	if err != nil {
		return nil, nil, err
	}
	if collateralXDCPrice == nil || lendTokenXDCPrice == nil {
		return common.Big0, common.Big0, nil
	}
	// Calculate collateral/LendToken price from collateral/XDC, lendToken/XDC
	collateralPrice = new(big.Int).Mul(collateralXDCPrice, lendingTokenDecimal)
	collateralPrice = new(big.Int).Div(collateralPrice, lendTokenXDCPrice)
	log.Debug("GetCollateralPrices: Calculate collateral/LendToken price from collateral/XDC, lendToken/XDC", "collateralPrice", collateralPrice,
		"collateralXDCPrice", collateralXDCPrice, "lendingTokenDecimal", lendingTokenDecimal, "lendTokenXDCPrice", lendTokenXDCPrice)
	return lendTokenXDCPrice, collateralPrice, nil
}

func (l *Lending) GetXDCBasePrices(header *types.Header, chain consensus.ChainContext, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, token common.Address) (*big.Int, error) {

	tokenXDCPriceFromContract, updatedBlock := lendingstate.GetCollateralPrice(statedb, token, common.XDCNativeAddressBinary)
	tokenXDCPriceUpdatedFromContract := updatedBlock.Uint64()/chain.Config().XDPoS.Epoch == header.Number.Uint64()/chain.Config().XDPoS.Epoch

	if token == common.XDCNativeAddressBinary {
		return common.BasePrice, nil
	} else if tokenXDCPriceUpdatedFromContract {
		// getting lendToken price from contract first
		// otherwise, getting from XDCx lendToken/XDC
		log.Debug("Getting token/XDC price from contract", "price", tokenXDCPriceFromContract)
		return tokenXDCPriceFromContract, nil
	} else {
		XDCTokenPriceFromContract, updatedBlock := lendingstate.GetCollateralPrice(statedb, common.XDCNativeAddressBinary, token)
		XDCTokenPriceUpdatedFromContract := updatedBlock.Uint64()/chain.Config().XDPoS.Epoch == header.Number.Uint64()/chain.Config().XDPoS.Epoch
		if XDCTokenPriceUpdatedFromContract && XDCTokenPriceFromContract != nil && XDCTokenPriceFromContract.Sign() > 0 {
			// getting lendToken price from contract first
			// otherwise, getting from XDCx lendToken/XDC
			log.Debug("Getting XDC/token from contract", "price", XDCTokenPriceFromContract)
			tokenDecimal, err := l.XDCx.GetTokenDecimal(chain, statedb, token)
			log.Debug("GetTokenDecimal", "token", token.Hex(), "err", err)
			if err != nil || tokenDecimal == nil || tokenDecimal.Sign() == 0 {
				return nil, err
			}
			tokenXDCPrice := new(big.Int).Mul(common.BasePrice, tokenDecimal)
			tokenXDCPrice = new(big.Int).Div(tokenXDCPrice, XDCTokenPriceFromContract)
			return tokenXDCPrice, nil
		}
		tokenXDCPrice, err := l.GetMediumTradePriceBeforeEpoch(chain, statedb, tradingStateDb, token, common.XDCNativeAddressBinary)
		if err != nil {
			return nil, err
		}
		if tokenXDCPrice != nil && tokenXDCPrice.Sign() > 0 {
			log.Debug("Getting token/XDC from XDCx", "price", tokenXDCPrice, "err", err)
			return tokenXDCPrice, nil
		}
	}
	log.Debug("Can't getting tokenXDCPrice ", "token", token.Hex())
	return nil, nil
}

func (l *Lending) AutoTopUp(statedb *state.StateDB, tradingState *tradingstate.TradingStateDB, lendingState *lendingstate.LendingStateDB, lendingBook, lendingTradeId common.Hash, currentPrice *big.Int) (*lendingstate.LendingTrade, error) {
	lendingTrade := lendingState.GetLendingTrade(lendingBook, lendingTradeId)
	if lendingTrade == lendingstate.EmptyLendingTrade {
		return nil, fmt.Errorf("process deposit for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId.Hex())
	}
	if currentPrice.Cmp(lendingTrade.LiquidationPrice) >= 0 {
		return nil, fmt.Errorf("currentPrice is still higher than or equal to LiquidationPrice. current price: %v  , liquidation price : %v  ", currentPrice, lendingTrade.LiquidationPrice)
	}
	// newLiquidationPrice = currentPrice * 90%
	newLiquidationPrice := new(big.Int).Mul(currentPrice, common.RateTopUp)
	newLiquidationPrice = new(big.Int).Div(newLiquidationPrice, common.BaseTopUp)
	// newLockedAmount = CollateralLockedAmount *  LiquidationPrice / newLiquidationPrice
	newLockedAmount := new(big.Int).Mul(lendingTrade.CollateralLockedAmount, lendingTrade.LiquidationPrice)
	newLockedAmount = new(big.Int).Div(newLockedAmount, newLiquidationPrice)

	requiredDepositAmount := new(big.Int).Sub(newLockedAmount, lendingTrade.CollateralLockedAmount)
	tokenBalance := lendingstate.GetTokenBalance(lendingTrade.Borrower, lendingTrade.CollateralToken, statedb)
	if tokenBalance.Cmp(requiredDepositAmount) < 0 {
		return nil, fmt.Errorf("not enough balance to AutoTopUp. requiredDepositAmount: %v . tokenBalance: %v . Token: %s", requiredDepositAmount, tokenBalance, lendingTrade.CollateralToken.Hex())
	}
	_, newTrade, err := l.ProcessTopUpLendingTrade(lendingState, statedb, tradingState, lendingTradeId, lendingBook, requiredDepositAmount)
	return newTrade, err
}

func (l *Lending) ProcessTopUpLendingTrade(lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, lendingTradeId common.Hash, lendingBook common.Hash, quantity *big.Int) (bool, *lendingstate.LendingTrade, error) {
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeId)
	if lendingTrade == lendingstate.EmptyLendingTrade {
		return true, nil, fmt.Errorf("process deposit for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId.Hex())
	}
	tokenBalance := lendingstate.GetTokenBalance(lendingTrade.Borrower, lendingTrade.CollateralToken, statedb)
	if tokenBalance.Cmp(quantity) < 0 {
		log.Debug("not enough balance deposit", "Quantity", quantity, "tokenBalance", tokenBalance)
		return true, nil, fmt.Errorf("not enough balance deposit. lendingTradeId: %v , Quantity : %v , tokenBalance : %v", lendingTradeId.Hex(), quantity, tokenBalance)
	}
	err := tradingStateDb.RemoveLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), lendingTrade.LiquidationPrice, lendingBook, lendingTrade.TradeId)
	if err != nil {
		return true, nil, err
	}
	err = lendingstate.SubTokenBalance(lendingTrade.Borrower, quantity, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("ProcessTopUpLendingTrade SubTokenBalance", "err", err, "lendingTrade.Borrower", lendingTrade.Borrower, "quantity", *quantity, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	err = lendingstate.AddTokenBalance(common.LendingLockAddressBinary, quantity, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("ProcessTopUpLendingTrade AddTokenBalance", "err", err, "LendingLockAddress", common.LendingLockAddress, "quantity", *quantity, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	oldLockedAmount := lendingTrade.CollateralLockedAmount
	newLockedAmount := new(big.Int).Add(quantity, oldLockedAmount)
	newLiquidationPrice := new(big.Int).Mul(lendingTrade.LiquidationPrice, oldLockedAmount)
	newLiquidationPrice = new(big.Int).Div(newLiquidationPrice, newLockedAmount)
	lendingStateDB.UpdateLiquidationPrice(lendingBook, lendingTrade.TradeId, newLiquidationPrice)
	lendingStateDB.UpdateCollateralLockedAmount(lendingBook, lendingTrade.TradeId, newLockedAmount)
	tradingStateDb.InsertLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), newLiquidationPrice, lendingBook, lendingTrade.TradeId)
	newLendingTrade := lendingTrade
	newLendingTrade.LiquidationPrice = newLiquidationPrice
	newLendingTrade.CollateralLockedAmount = newLockedAmount
	log.Debug("ProcessTopUp successfully", "price", newLiquidationPrice, "lockAmount", newLockedAmount)
	return false, &newLendingTrade, nil
}

func (l *Lending) ProcessRepayLendingTrade(header *types.Header, chain consensus.ChainContext, lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingstateDB *tradingstate.TradingStateDB, lendingBook common.Hash, lendingTradeId uint64) (trade *lendingstate.LendingTrade, err error) {
	lendingTradeIdHash := common.Uint64ToHash(lendingTradeId)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeIdHash)
	if lendingTrade == lendingstate.EmptyLendingTrade {
		return nil, fmt.Errorf("ProcessRepayLendingTrade for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId)
	}
	time := header.Time.Uint64()
	tokenBalance := lendingstate.GetTokenBalance(lendingTrade.Borrower, lendingTrade.LendingToken, statedb)
	paymentBalance := lendingstate.CalculateTotalRepayValue(time, lendingTrade.LiquidationTime, lendingTrade.Term, lendingTrade.Interest, lendingTrade.Amount)
	log.Debug("ProcessRepay", "totalInterest", new(big.Int).Sub(paymentBalance, lendingTrade.Amount), "totalRepayValue", paymentBalance, "token", lendingTrade.LendingToken.Hex())

	if tokenBalance.Cmp(paymentBalance) < 0 {
		if lendingTrade.LiquidationTime > time {
			return nil, fmt.Errorf("not enough balance need : %s , have : %s", paymentBalance, tokenBalance)
		}
		newLendingTrade := &lendingstate.LendingTrade{}
		var err error
		if chain.Config().IsTIPXDCXLending(header.Number) {
			newLendingTrade, err = l.LiquidationExpiredTrade(header, chain, lendingStateDB, statedb, tradingstateDB, lendingBook, lendingTradeId)
		} else {
			newLendingTrade, err = l.LiquidationTrade(lendingStateDB, statedb, tradingstateDB, lendingBook, lendingTradeId)
			liquidationData := lendingstate.LiquidationData{
				RecallAmount:      common.Big0,
				LiquidationAmount: lendingTrade.CollateralLockedAmount,
				CollateralPrice:   common.Big0,
				Reason:            lendingstate.LiquidatedByTime,
			}
			extraData, _ := json.Marshal(liquidationData)
			if newLendingTrade != nil {
				newLendingTrade.ExtraData = string(extraData)
			}
		}
		if err != nil {
			return nil, err
		}
		if newLendingTrade != nil {
			newLendingTrade.Status = lendingstate.TradeStatusLiquidated
		}
		return newLendingTrade, err
	} else {
		err := lendingstate.SubTokenBalance(lendingTrade.Borrower, paymentBalance, lendingTrade.LendingToken, statedb)
		if err != nil {
			log.Warn("ProcessRepayLendingTrade SubTokenBalance", "err", err, "lendingTrade.Borrower", lendingTrade.Borrower, "paymentBalance", *paymentBalance, "lendingTrade.LendingToken", lendingTrade.LendingToken)
		}
		err = lendingstate.AddTokenBalance(lendingTrade.Investor, paymentBalance, lendingTrade.LendingToken, statedb)
		if err != nil {
			log.Warn("ProcessRepayLendingTrade AddTokenBalance", "err", err, "lendingTrade.Investor", lendingTrade.Investor, "paymentBalance", *paymentBalance, "lendingTrade.LendingToken", lendingTrade.LendingToken)
		}
		err = lendingstate.SubTokenBalance(common.LendingLockAddressBinary, lendingTrade.CollateralLockedAmount, lendingTrade.CollateralToken, statedb)
		if err != nil {
			log.Warn("ProcessRepayLendingTrade SubTokenBalance", "err", err, "LendingLockAddress", common.LendingLockAddress, "lendingTrade.CollateralLockedAmount", *lendingTrade.CollateralLockedAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
		}
		err = lendingstate.AddTokenBalance(lendingTrade.Borrower, lendingTrade.CollateralLockedAmount, lendingTrade.CollateralToken, statedb)
		if err != nil {
			log.Warn("ProcessRepayLendingTrade AddTokenBalance", "err", err, "lendingTrade.Borrower", lendingTrade.Borrower, "lendingTrade.CollateralLockedAmount", *lendingTrade.CollateralLockedAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
		}

		err = lendingStateDB.RemoveLiquidationTime(lendingBook, lendingTradeId, lendingTrade.LiquidationTime)
		if err != nil {
			log.Debug("ProcessRepay RemoveLiquidationTime", "err", err, "lendingHash", lendingTrade.Hash, "trade", lendingstate.ToJSON(lendingTrade))
			return nil, err
		}
		err = tradingstateDB.RemoveLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), lendingTrade.LiquidationPrice, lendingBook, lendingTradeId)
		if err != nil {
			log.Debug("ProcessRepay RemoveLiquidationPrice", "err", err)
			return nil, err
		}
		err = lendingStateDB.CancelLendingTrade(lendingBook, lendingTradeId)
		if err != nil {
			log.Debug("ProcessRepay CancelLendingTrade", "err", err)
			return nil, err
		}
		lendingTrade.Status = lendingstate.TradeStatusClosed
		extraData, _ := json.Marshal(struct {
			Profit *big.Int
		}{
			Profit: new(big.Int).Sub(paymentBalance, lendingTrade.Amount),
		})
		lendingTrade.ExtraData = string(extraData)
	}
	return &lendingTrade, nil
}

func (l *Lending) ProcessRecallLendingTrade(lendingStateDB *lendingstate.LendingStateDB, statedb *state.StateDB, tradingStateDb *tradingstate.TradingStateDB, lendingBook common.Hash, lendingTradeId common.Hash, newLiquidationPrice *big.Int) (bool, *lendingstate.LendingTrade, error) {
	log.Debug("ProcessRecallLendingTrade", "lendingTradeId", lendingTradeId.Hex(), "lendingBook", lendingBook.Hex(), "newLiquidationPrice", newLiquidationPrice)
	lendingTrade := lendingStateDB.GetLendingTrade(lendingBook, lendingTradeId)
	if lendingTrade == lendingstate.EmptyLendingTrade {
		return true, nil, fmt.Errorf("process recall for emptyLendingTrade is not allowed. lendingTradeId: %v", lendingTradeId.Hex())
	}
	if newLiquidationPrice.Cmp(lendingTrade.LiquidationPrice) <= 0 {
		return true, nil, fmt.Errorf("New liquidation price must higher than  old liquidation price. current liquidation price: %v  , new liquidation price : %v  ", lendingTrade.LiquidationPrice, newLiquidationPrice)
	}
	newLockedAmount := new(big.Int).Mul(lendingTrade.CollateralLockedAmount, lendingTrade.LiquidationPrice)
	newLockedAmount = new(big.Int).Div(newLockedAmount, newLiquidationPrice)
	recallAmount := new(big.Int).Sub(lendingTrade.CollateralLockedAmount, newLockedAmount)
	log.Debug("ProcessRecallLendingTrade", "newLockedAmount", newLockedAmount, "recallAmount", recallAmount, "oldLiquidationPrice", lendingTrade.LiquidationPrice, "newLiquidationPrice", newLiquidationPrice)
	err := tradingStateDb.RemoveLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), lendingTrade.LiquidationPrice, lendingBook, lendingTrade.TradeId)
	if err != nil {
		return true, nil, err
	}
	err = lendingstate.AddTokenBalance(lendingTrade.Borrower, recallAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("ProcessRecallLendingTrade AddTokenBalance", "err", err, "lendingTrade.Borrower", lendingTrade.Borrower, "recallAmount", *recallAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}
	err = lendingstate.SubTokenBalance(common.LendingLockAddressBinary, recallAmount, lendingTrade.CollateralToken, statedb)
	if err != nil {
		log.Warn("ProcessRecallLendingTrade SubTokenBalance", "err", err, "LendingLockAddress", common.LendingLockAddress, "recallAmount", *recallAmount, "lendingTrade.CollateralToken", lendingTrade.CollateralToken)
	}

	lendingStateDB.UpdateLiquidationPrice(lendingBook, lendingTrade.TradeId, newLiquidationPrice)
	lendingStateDB.UpdateCollateralLockedAmount(lendingBook, lendingTrade.TradeId, newLockedAmount)
	tradingStateDb.InsertLiquidationPrice(tradingstate.GetTradingOrderBookHash(lendingTrade.CollateralToken, lendingTrade.LendingToken), newLiquidationPrice, lendingBook, lendingTrade.TradeId)
	newLendingTrade := lendingTrade
	newLendingTrade.LiquidationPrice = newLiquidationPrice
	newLendingTrade.CollateralLockedAmount = newLockedAmount
	log.Debug("ProcessRecall", "price", newLiquidationPrice, "lockAmount", newLockedAmount, "recall amount", recallAmount)
	return false, &newLendingTrade, nil
}