Exemple #1
0
// charge an object. Deduct from an object, create one or more objects and
// associated to one or more wallets
func (c *ObjectController) Charge(params martini.Params, res http.ResponseWriter, req services.AuxRequestContext, log *config.CustomLog, db *services.DB) {

	// parse body
	var body objectChargeBody
	if err := c.ParseJsonBody(req, &body); err != nil {
		services.Res(res).Error(400, "invalid_body", "request body is invalid or malformed. Expects valid json body")
		return
	}

	// TODO: get client id from access token
	clientID := "kl14zFDq4SHlmmmVNHgLtE0LqCo8BTjyShOH"

	// get db transaction object
	dbTx, err := db.GetPostgresHandleWithRepeatableReadTrans()
	if err != nil {
		c.log.Error(err.Error())
		services.Res(res).Error(500, "", "server error")
		return
	}

	// get service
	service, _, _ := models.FindServiceByClientId(dbTx, clientID)

	// ensure object ids is not empty
	if len(body.IDS) == 0 {
		services.Res(res).ErrParam("ids").Error(400, "invalid_parameter", "provide one or more object ids to charge")
		return
	}

	// ensure object ids length is less than 100
	if len(body.IDS) > 100 {
		services.Res(res).ErrParam("ids").Error(400, "invalid_parameter", "only a maximum of 100 objects can be charge at a time")
		return
	}

	// ensure destination wallet is provided
	if c.validate.IsEmpty(body.DestinationWalletID) {
		services.Res(res).ErrParam("wallet_id").Error(400, "invalid_parameter", "destination wallet id is reqired")
		return
	}

	// ensure amount is provided
	if body.Amount < MinimumObjectUnit {
		services.Res(res).ErrParam("amount").Error(400, "invalid_parameter", fmt.Sprintf("amount is below the minimum charge limit. Mininum charge limit is %.8f", MinimumObjectUnit))
		return
	}

	// if meta is provided, ensure it is not greater than the limit size
	if !c.validate.IsEmpty(body.Meta) && len([]byte(body.Meta)) > MaxMetaSize {
		services.Res(res).ErrParam("meta").Error(400, "invalid_parameter", fmt.Sprintf("Meta contains too much data. Max size is %d bytes", MaxMetaSize))
		return
	}

	// ensure destination wallet exists
	wallet, found, err := models.FindWalletByObjectID(dbTx, body.DestinationWalletID)
	if err != nil {
		dbTx.Rollback()
		c.log.Error(err.Error())
		services.Res(res).Error(500, "api_error", "api_error")
		return
	} else if !found {
		dbTx.Rollback()
		services.Res(res).ErrParam("wallet_id").Error(404, "not_found", "wallet_id not found")
		return
	}

	// find all objects
	objectsFound, err := models.FindAllObjectsByObjectID(dbTx, body.IDS)
	if err != nil {
		dbTx.Rollback()
		c.log.Error(err.Error())
		services.Res(res).Error(500, "api_error", "api_error")
		return
	}

	// ensure all objects exists
	if len(objectsFound) != len(body.IDS) {
		dbTx.Rollback()
		services.Res(res).ErrParam("ids").Error(404, "object_error", "one or more objects do not exist")
		return
	}

	// sort object by balance in descending order
	sort.Sort(services.ByObjectBalance(objectsFound))

	// objects to charge
	objectsToCharge := []models.Object{}

	// validate each object
	// check open status (timed and pin)
	// collect the required objects to sufficiently
	// complete a charge from the list of found objects
	for _, object := range objectsFound {

		// as long as the total balance of objects to be charged is not above charge amount
		// keep setting aside objects to charge from.
		// once we have the required objects to cover charge amount, stop processing other objects
		if TotalBalance(objectsToCharge) < body.Amount {
			objectsToCharge = append(objectsToCharge, object)
		} else {
			break
		}

		// ensure service is the issuer of object
		if object.Service.ObjectID != service.ObjectID {
			dbTx.Rollback()
			services.Res(res).ErrParam("ids").Error(402, "object_error", fmt.Sprintf("%s: service cannot charge an object not issued by it", object.ObjectID))
			return
		}

		// ensure object is open
		if !object.Open {
			dbTx.Rollback()
			services.Res(res).ErrParam("ids").Error(402, "object_error", fmt.Sprintf("%s: object is not opened and cannot be charged", object.ObjectID))
			return

		} else {

			// for object with open_timed open method, ensure time is not passed
			if object.OpenMethod == models.ObjectOpenTimed {
				objectOpenTime := services.UnixToTime(object.OpenTime).UTC()
				now := time.Now().UTC()
				if now.After(objectOpenTime) {
					dbTx.Rollback()
					services.Res(res).ErrParam("ids").Error(402, "object_error", fmt.Sprintf("%s: object open time period has expired", object.ObjectID))
					return
				}
			}

			// for object with open_pin open method, ensure pin is provided and
			// it matches. Pin should be found in the optional pin object of the request body
			if object.OpenMethod == models.ObjectOpenPin {
				if pin, found := body.Pins[object.ObjectID]; found {

					// ensure pin provided matches objects pin
					if !services.BcryptCompare(object.OpenPin, strconv.Itoa(pin)) {
						dbTx.Rollback()
						services.Res(res).ErrParam("ids").Error(402, "object_error", fmt.Sprintf("%s: pin provided to open object is invalid", object.ObjectID))
						return
					}

				} else {
					dbTx.Rollback()
					services.Res(res).ErrParam("ids").Error(402, "object_error", fmt.Sprintf("%s: object pin not found in pin parameter of request body", object.ObjectID))
					return
				}
			}
		}
	}

	totalObjectsBalance := TotalBalance(objectsToCharge)

	// ensure total balance of objects to charge is sufficient for charge amount
	if totalObjectsBalance < body.Amount {
		dbTx.Rollback()
		services.Res(res).ErrParam("amount").Error(402, "invalid_parameter", fmt.Sprintf("object%s total balance not sufficient to cover charge amount", services.SIfNotZero(len(body.IDS))))
		return
	}

	lastObj := objectsToCharge[len(objectsToCharge)-1]

	// if there is excess, the last object is always the supplement object.
	// deduct from last object's balance, update object and remove it from the objectsToCharge list
	if totalObjectsBalance > body.Amount {
		lastObj.Balance = totalObjectsBalance - body.Amount
		objectsToCharge = objectsToCharge[0 : len(objectsToCharge)-1]
		dbTx.Save(&lastObj)
	}

	// delete the objects to charge
	for _, object := range objectsToCharge {
		dbTx.Delete(&object)
	}

	// create new object. set balance to charge balance
	// generate a pin
	countryCallCode := config.CurrencyCallCodes[strings.ToUpper(service.Identity.BaseCurrency)]
	newPin, err := services.NewObjectPin(strconv.Itoa(countryCallCode))
	if err != nil {
		dbTx.Rollback()
		c.log.Error(err.Error())
		services.Res(res).Error(500, "api_error", "server error")
		return
	}

	newObj := NewObject(newPin, models.ObjectValue, service, wallet, body.Amount, body.Meta)
	err = models.CreateObject(dbTx, &newObj)
	if err != nil {
		dbTx.Rollback()
		c.log.Error(err.Error())
		services.Res(res).Error(500, "api_error", "server error")
		return
	}

	dbTx.Save(&newObj).Commit()
	services.Res(res).Json(newObj)
}
Exemple #2
0
// generate and return client_credentials token
func (c *AuthController) GetClientCredentialToken(res http.ResponseWriter, req services.AuxRequestContext, log *config.CustomLog, db *services.DB) {

	// get base64 encoded credentials
	base64Credential := services.StringSplit(req.Header.Get("Authorization"), " ")[1]
	base64CredentialDecoded := services.DecodeB64(base64Credential)
	credentials := services.StringSplit(base64CredentialDecoded, ":")

	// check if requesting client is a back service id
	if credentials[0] == BackOfficeId && credentials[1] == BackOfficeSecret {

		exp := int64(0)
		token, err := createJWTToken("", true, exp)
		if err != nil {
			log.Error(err)
			services.Res(res).Error(500, "", "server error")
			return
		}

		// create and save new token
		newToken := models.Token{
			Token:     token,
			Type:      "bearer",
			ExpiresIn: time.Time{},
			CreatedAt: time.Now().UTC(),
			UpdatedAt: time.Now().UTC(),
		}

		// persist token
		err = models.CreateToken(db.GetPostgresHandle(), &newToken)
		if err != nil {
			c.log.Error(err.Error())
			services.Res(res).Error(500, "", "server error")
			return
		}

		services.Res(res).Json(newToken)
		return
	}

	// find service by client id
	service, found, err := models.FindServiceByClientId(db.GetPostgresHandle(), credentials[0])
	if !found && err == nil {
		log.Error(err)
		services.Res(res).Error(404, "", "service not found")
		return
	} else if err != nil {
		c.log.Error(err.Error())
		services.Res(res).Error(500, "", "server error")
		return
	}

	// compare secret
	if credentials[1] != service.ClientSecret {
		log.Error(err)
		services.Res(res).Error(401, "", "service credentials are invalid. ensure client id and secret are valid")
		return
	}

	// create access token
	exp := time.Now().Add(time.Hour * 1)
	token, err := createJWTToken(service.ObjectID, false, exp.UTC().Unix())
	if err != nil {
		log.Error(err)
		services.Res(res).Error(500, "", "server error")
		return
	}

	// create and save new token
	newToken := models.Token{
		Service:   service,
		Token:     token,
		Type:      "bearer",
		ExpiresIn: exp.UTC(),
		CreatedAt: time.Now().UTC(),
		UpdatedAt: time.Now().UTC(),
	}

	// persist token
	err = models.CreateToken(db.GetPostgresHandle(), &newToken)
	if err != nil {
		c.log.Error(err.Error())
		services.Res(res).Error(500, "", "server error")
		return
	}

	respObj, _ := services.StructToJsonToMap(newToken)
	respObj["service"] = services.DeleteKeys(respObj["service"].(map[string]interface{}), "client_id", "client_secret")
	services.Res(res).Json(respObj)
}
Exemple #3
0
// create object controller
func (c *ObjectController) Create(res http.ResponseWriter, req services.AuxRequestContext, log *config.CustomLog, db *services.DB) {

	// parse body
	var body objectCreateBody
	if err := c.ParseJsonBody(req, &body); err != nil {
		services.Res(res).Error(400, "invalid_body", "request body is invalid or malformed. Expects valid json body")
		return
	}

	// TODO: get client id from access token
	clientID := "kl14zFDq4SHlmmmVNHgLtE0LqCo8BTjyShOH"

	// get db transaction object
	dbTx, err := db.GetPostgresHandleWithRepeatableReadTrans()
	if err != nil {
		c.log.Error(err.Error())
		services.Res(res).Error(500, "", "server error")
		return
	}

	// get service
	service, _, _ := models.FindServiceByClientId(dbTx, clientID)

	// ensure service is an issuer
	if !service.Identity.Issuer {
		dbTx.Rollback()
		services.Res(res).Error(401, "unauthorized_service", "service is not an issuer")
		return
	}

	// type is required
	if validator.IsNull(body.Type) {
		dbTx.Rollback()
		services.Res(res).Error(400, "missing_parameter", "Missing required field: type")
		return
	}

	// ensure type is valid
	if strings.ToLower(body.Type) != models.ObjectValue && strings.ToLower(body.Type) != models.ObjectValueless {
		dbTx.Rollback()
		services.Res(res).Error(400, "invalid_type", "type can only be obj_value or obj_valueless")
		return
	}

	// wallet id is required
	if validator.IsNull(body.WalletID) {
		dbTx.Rollback()
		services.Res(res).Error(400, "missing_parameter", "Missing required field: wallet_id")
		return
	}

	// ensure number of objects is greater than 0
	if body.NumberOfObjects < 1 {
		dbTx.Rollback()
		services.Res(res).Error(400, "invalid_number_objects", "number_objects must be atleast 1 but not more than 100")
		return
	}

	// ensure number of objects is not greater than 100(the limit)
	if body.NumberOfObjects > 100 {
		dbTx.Rollback()
		services.Res(res).Error(400, "invalid_number_objects", "number_objects must not be more than 100")
		return
	}

	// for object of value, validate  unit per object
	if strings.ToLower(body.Type) == models.ObjectValue {

		if body.BalancePerObject == 0 {
			dbTx.Rollback()
			services.Res(res).Error(400, "missing_parameter", "Missing required field: unit_per_object")
			return
		}

		if body.BalancePerObject < MinimumObjectUnit {
			dbTx.Rollback()
			services.Res(res).Error(400, "invalid_unit_per_object", "unit_per_object must be equal or greater than the minimum object unit which is 0.00000001")
			return
		}

		soulBalanceRequired := float64(body.NumberOfObjects) * body.BalancePerObject
		if service.Identity.SoulBalance < soulBalanceRequired {
			dbTx.Rollback()
			services.Res(res).Error(400, "insufficient_soul_balance", fmt.Sprintf("not enough soul balance to create object(s). Requires %.2f soul balance", soulBalanceRequired))
			return
		}

		// update services soul balance
		service.Identity.SoulBalance = service.Identity.SoulBalance - soulBalanceRequired
	}

	// if meta is provided, ensure it is not greater than the limit size
	if !c.validate.IsEmpty(body.Meta) && len([]byte(body.Meta)) > MaxMetaSize {
		dbTx.Rollback()
		services.Res(res).Error(400, "invalid_meta_size", fmt.Sprintf("Meta contains too much data. Max size is %d bytes", MaxMetaSize))
		return
	}

	// ensure wallet exists
	wallet, found, err := models.FindWalletByObjectID(dbTx, body.WalletID)
	if err != nil {
		dbTx.Rollback()
		c.log.Error(err.Error())
		services.Res(res).Error(500, "", "server error")
		return
	} else if !found {
		dbTx.Rollback()
		services.Res(res).Error(404, "invalid_wallet", "wallet_id is unknown")
		return
	}

	// ensure service owns the wallet
	if service.Identity.ObjectID != wallet.Identity.ObjectID {
		dbTx.Rollback()
		services.Res(res).Error(401, "invalid_wallet", "wallet is not owned by this service. Use a wallet created by this service")
		return
	}

	// create objects
	allNewObjects := []models.Object{}
	for i := 0; i < body.NumberOfObjects; i++ {

		// generate a pin
		countryCallCode := config.CurrencyCallCodes[strings.ToUpper(service.Identity.BaseCurrency)]
		newPin, err := services.NewObjectPin(strconv.Itoa(countryCallCode))
		if err != nil {
			dbTx.Rollback()
			c.log.Error(err.Error())
			services.Res(res).Error(500, "", "server error")
			return
		}

		newObj := NewObject(newPin, body.Type, service, wallet, body.BalancePerObject, body.Meta)
		err = models.CreateObject(dbTx, &newObj)
		if err != nil {
			dbTx.Rollback()
			c.log.Error(err.Error())
			services.Res(res).Error(500, "", "server error")
			return
		}
		allNewObjects = append(allNewObjects, newObj)
	}

	// update identity's soul balance
	dbTx.Save(service.Identity).Commit()
	services.Res(res).Json(allNewObjects)
}