Beispiel #1
0
// CreateOrder create specifc order.
func CreateOrder(egn engine.Exchange) sknet.HandlerFunc {
	return func(c *sknet.Context) error {
		rlt := &pp.EmptyRes{}
		req := &pp.OrderReq{}
		for {
			if err := c.BindJSON(req); err != nil {
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongRequest)
				logger.Error(err.Error())
				break
			}

			// validate pubkey
			pubkey := req.GetPubkey()
			if err := validatePubkey(pubkey); err != nil {
				logger.Error(err.Error())
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongPubkey)
				break
			}

			// get order type
			op, err := order.TypeFromStr(req.GetType())
			if err != nil {
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongRequest)
				logger.Error(err.Error())
				break
			}

			// find the account
			acnt, err := egn.GetAccount(pubkey)
			if err != nil {
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongPubkey)
				logger.Error(err.Error())
				break
			}

			cp, bal, err := needBalance(op, req)
			if err != nil {
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongRequest)
				logger.Error(err.Error())
				break
			}

			if acnt.GetBalance(cp) < bal {
				err := fmt.Errorf("%s balance is not sufficient", cp)
				rlt = pp.MakeErrRes(err)
				logger.Debug(err.Error())
				break
			}

			var success bool
			if op == order.Bid {
				defer func() {
					if success {
						egn.SaveAccount()
					} else {
						acnt.IncreaseBalance(cp, bal)
					}
				}()
				// decrease the balance, in case of double use the coins.
				logger.Info("account:%s decrease %s:%d", acnt.GetID(), cp, bal)
				if err := acnt.DecreaseBalance(cp, bal); err != nil {
					rlt = pp.MakeErrRes(err)
					logger.Error(err.Error())
					break
				}
			}

			odr := order.New(pubkey, op, req.GetPrice(), req.GetAmount())
			oid, err := egn.AddOrder(req.GetCoinPair(), *odr)
			if err != nil {
				logger.Error(err.Error())
				rlt = pp.MakeErrResWithCode(pp.ErrCode_WrongRequest)
				break
			}
			success = true
			logger.Info(fmt.Sprintf("new %s order:%d", op, oid))
			res := pp.OrderRes{
				Result:  pp.MakeResultWithCode(pp.ErrCode_Success),
				OrderId: &oid,
			}
			return c.SendJSON(&res)
		}
		return c.Error(rlt)
	}
}