chore(addincominginvoice): add exceeding checks for volume, balance, receive

controllers/addinvoice.ctrl.go

@@ -5,7 +5,6 @@ import (
 
 	"github.com/getAlby/lndhub.go/lib/responses"
 	"github.com/getAlby/lndhub.go/lib/service"
-	"github.com/getsentry/sentry-go"
 	"github.com/labstack/echo/v4"
 	"github.com/labstack/gommon/log"
 )
@@ -62,38 +61,11 @@ func AddInvoice(c echo.Context, svc *service.LndhubService, userID int64) error
 		return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
 	}
 
-	if svc.Config.MaxReceiveAmount > 0 {
-		if amount > svc.Config.MaxReceiveAmount {
-			c.Logger().Errorf("Max receive amount exceeded for user_id:%v (amount:%v)", userID, amount)
-			return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
-		}
-	}
-
-	if svc.Config.MaxAccountBalance > 0 {
-		currentBalance, err := svc.CurrentUserBalance(c.Request().Context(), userID)
-		if err != nil {
-			c.Logger().Errorj(
-				log.JSON{
-					"message":        "error fetching balance",
-					"lndhub_user_id": userID,
-					"error":          err,
-				},
-			)
-			return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
-		}
-		if currentBalance+amount > svc.Config.MaxAccountBalance {
-			c.Logger().Errorf("Max account balance exceeded for user_id:%v (balance:%v + amount:%v)", userID, currentBalance, amount)
-			return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
-		}
-	}
-
 	c.Logger().Infof("Adding invoice: user_id:%v memo:%s value:%v description_hash:%s", userID, body.Memo, amount, body.DescriptionHash)
 
-	invoice, err := svc.AddIncomingInvoice(c.Request().Context(), userID, amount, body.Memo, body.DescriptionHash)
-	if err != nil {
-		c.Logger().Errorf("Error creating invoice: user_id:%v error: %v", userID, err)
-		sentry.CaptureException(err)
-		return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
+	invoice, errResp := svc.AddIncomingInvoice(c.Request().Context(), userID, amount, body.Memo, body.DescriptionHash)
+	if errResp != nil {
+		return c.JSON(errResp.HttpStatusCode, errResp)
 	}
 	responseBody := AddInvoiceResponseBody{}
 	responseBody.RHash = invoice.RHash

controllers_v2/invoice.ctrl.go

@@ -7,7 +7,6 @@ import (
 	"github.com/getAlby/lndhub.go/common"
 	"github.com/getAlby/lndhub.go/lib/responses"
 	"github.com/getAlby/lndhub.go/lib/service"
-	"github.com/getsentry/sentry-go"
 	"github.com/labstack/echo/v4"
 	"github.com/labstack/gommon/log"
 )
@@ -180,11 +179,9 @@ func (controller *InvoiceController) AddInvoice(c echo.Context) error {
 
 	c.Logger().Infof("Adding invoice: user_id:%v memo:%s value:%v description_hash:%s", userID, body.Description, body.Amount, body.DescriptionHash)
 
-	invoice, err := controller.svc.AddIncomingInvoice(c.Request().Context(), userID, body.Amount, body.Description, body.DescriptionHash)
-	if err != nil {
-		c.Logger().Errorf("Error creating invoice: user_id:%v error: %v", userID, err)
-		sentry.CaptureException(err)
-		return c.JSON(http.StatusBadRequest, responses.BadArgumentsError)
+	invoice, errResp := controller.svc.AddIncomingInvoice(c.Request().Context(), userID, body.Amount, body.Description, body.DescriptionHash)
+	if errResp != nil {
+		return c.JSON(errResp.HttpStatusCode, errResp)
 	}
 	responseBody := AddInvoiceResponseBody{
 		PaymentHash:    invoice.RHash,

integration_tests/internal_payment_test.go

@@ -133,7 +133,7 @@ func (suite *PaymentTestSuite) TestPaymentFeeReserve() {
 	//reset fee reserve so it's not used in other tests
 	suite.service.Config.FeeReserve = false
 }
-func (suite *PaymentTestSuite) TestVolumeExceeded() {
+func (suite *PaymentTestSuite) TestIncomingExceededChecks() {
 	//this will cause the payment to fail as the account was already funded
 	//with 1000 sats
 	suite.service.Config.MaxVolume = 999
@@ -150,7 +150,7 @@ func (suite *PaymentTestSuite) TestVolumeExceeded() {
 	//try to make external payment
 	//which should fail
 	//create external invoice
-	externalSatRequested := 1000
+	externalSatRequested := 500
 	externalInvoice := lnrpc.Invoice{
 		Memo:  "integration tests: external pay from user",
 		Value: int64(externalSatRequested),
@@ -190,9 +190,53 @@ func (suite *PaymentTestSuite) TestVolumeExceeded() {
 	suite.echo.ServeHTTP(rec, req)
 	assert.Equal(suite.T(), http.StatusOK, rec.Code)
 
-	//change the config back
+	suite.service.Config.MaxReceiveAmount = 21
+	rec = httptest.NewRecorder()
+	assert.NoError(suite.T(), json.NewEncoder(&buf).Encode(&ExpectedAddInvoiceRequestBody{
+		Amount: aliceFundingSats,
+		Memo:   "memo",
+	}))
+	req = httptest.NewRequest(http.MethodPost, "/addinvoice", &buf)
+	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
+	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", suite.aliceToken))
+	suite.echo.ServeHTTP(rec, req)
+	//should fail because max receive amount check
+	assert.Equal(suite.T(), http.StatusBadRequest, rec.Code)
+	resp = &responses.ErrorResponse{}
+	err = json.NewDecoder(rec.Body).Decode(resp)
+	assert.NoError(suite.T(), err)
+	assert.Equal(suite.T(), responses.ReceiveExceededError.Message, resp.Message)
+
+	// remove volume and receive config and check if it works
+	suite.service.Config.MaxVolume = 0
 	suite.service.Config.MaxVolumePeriod = 0
-	suite.service.Config.MaxVolume = 1e6
+	suite.service.Config.MaxReceiveAmount = 0
+	invoiceResponse = suite.createAddInvoiceReq(aliceFundingSats, "integration test internal payment alice", suite.aliceToken)
+	err = suite.mlnd.mockPaidInvoice(invoiceResponse, 0, false, nil)
+	assert.NoError(suite.T(), err)
+
+	// add max account
+	suite.service.Config.MaxAccountBalance = 500
+	assert.NoError(suite.T(), json.NewEncoder(&buf).Encode(&ExpectedAddInvoiceRequestBody{
+		Amount: aliceFundingSats,
+		Memo:   "memo",
+	}))
+	req = httptest.NewRequest(http.MethodPost, "/addinvoice", &buf)
+	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
+	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", suite.aliceToken))
+	suite.echo.ServeHTTP(rec, req)
+	//should fail because max balance check
+	assert.Equal(suite.T(), http.StatusBadRequest, rec.Code)
+	resp = &responses.ErrorResponse{}
+	err = json.NewDecoder(rec.Body).Decode(resp)
+	assert.NoError(suite.T(), err)
+	assert.Equal(suite.T(), responses.BalanceExceededError.Message, resp.Message)
+
+	//change the config back and add sats, it should work now
+	suite.service.Config.MaxAccountBalance = 0
+	invoiceResponse = suite.createAddInvoiceReq(aliceFundingSats, "integration test internal payment alice", suite.aliceToken)
+	err = suite.mlnd.mockPaidInvoice(invoiceResponse, 0, false, nil)
+	assert.NoError(suite.T(), err)
 }
 func (suite *PaymentTestSuite) TestInternalPayment() {
 	aliceFundingSats := 1000

integration_tests/invoice_test.go

@@ -92,8 +92,8 @@ func (suite *InvoiceTestSuite) TestPreimageEntropy() {
 	user, _ := suite.service.FindUserByLogin(context.Background(), suite.aliceLogin.Login)
 	preimageChars := map[byte]int{}
 	for i := 0; i < 1000; i++ {
-		inv, err := suite.service.AddIncomingInvoice(context.Background(), user.ID, 10, "test entropy", "")
-		assert.NoError(suite.T(), err)
+		inv, errResp := suite.service.AddIncomingInvoice(context.Background(), user.ID, 10, "test entropy", "")
+		assert.Nil(suite.T(), errResp)
 		primgBytes, _ := hex.DecodeString(inv.Preimage)
 		for _, char := range primgBytes {
 			preimageChars[char] += 1

lib/responses/errors.go

@@ -64,6 +64,20 @@ var NotEnoughBalanceError = ErrorResponse{
 	HttpStatusCode: 400,
 }
 
+var ReceiveExceededError = ErrorResponse{
+	Error:          true,
+	Code:           2,
+	Message:        "max receive amount exceeded. please contact support for further assistance.",
+	HttpStatusCode: 400,
+}
+
+var BalanceExceededError = ErrorResponse{
+	Error:          true,
+	Code:           2,
+	Message:        "max account balance exceeded. please contact support for further assistance.",
+	HttpStatusCode: 400,
+}
+
 var TooMuchVolumeError = ErrorResponse{
 	Error:          true,
 	Code:           2,

lib/service/invoices.go

@@ -13,8 +13,10 @@ import (
 
 	"github.com/getAlby/lndhub.go/common"
 	"github.com/getAlby/lndhub.go/db/models"
+	"github.com/getAlby/lndhub.go/lib/responses"
 	"github.com/getAlby/lndhub.go/lnd"
 	"github.com/getsentry/sentry-go"
+	"github.com/labstack/gommon/log"
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/uptrace/bun"
 	"github.com/uptrace/bun/schema"
@@ -475,10 +477,48 @@ func (svc *LndhubService) AddOutgoingInvoice(ctx context.Context, userID int64,
 	return &invoice, nil
 }
 
-func (svc *LndhubService) AddIncomingInvoice(ctx context.Context, userID int64, amount int64, memo, descriptionHashStr string) (*models.Invoice, error) {
+func (svc *LndhubService) AddIncomingInvoice(ctx context.Context, userID int64, amount int64, memo, descriptionHashStr string) (*models.Invoice, *responses.ErrorResponse) {
+
+	if svc.Config.MaxReceiveAmount > 0 {
+		if amount > svc.Config.MaxReceiveAmount {
+			svc.Logger.Errorf("Max receive amount exceeded for user_id %d", userID)
+			return nil, &responses.ReceiveExceededError
+		}
+	}
+
+	if svc.Config.MaxAccountBalance > 0 {
+		currentBalance, err := svc.CurrentUserBalance(ctx, userID)
+		if err != nil {
+			svc.Logger.Errorj(
+				log.JSON{
+					"message":        "error fetching balance",
+					"lndhub_user_id": userID,
+					"error":          err,
+				},
+			)
+			return nil, &responses.GeneralServerError
+		}
+		if currentBalance+amount > svc.Config.MaxAccountBalance {
+			svc.Logger.Errorf("Max account balance exceeded for user_id %d", userID)
+			return nil, &responses.BalanceExceededError
+		}
+	}
+
+	if svc.Config.MaxVolume > 0 {
+		volume, err := svc.GetVolumeOverPeriod(ctx, userID, time.Duration(svc.Config.MaxVolumePeriod*int64(time.Second)))
+		if err != nil {
+			return nil, &responses.GeneralServerError
+		}
+		if volume > svc.Config.MaxVolume {
+			svc.Logger.Errorf("Transaction volume exceeded for user_id %d", userID)
+			sentry.CaptureMessage(fmt.Sprintf("transaction volume exceeded for user %d", userID))
+			return nil, &responses.TooMuchVolumeError
+		}
+	}
+
 	preimage, err := makePreimageHex()
 	if err != nil {
-		return nil, err
+		return nil, &responses.GeneralServerError
 	}
 	expiry := time.Hour * 24 // invoice expires in 24h
 	// Initialize new DB invoice
@@ -495,12 +535,12 @@ func (svc *LndhubService) AddIncomingInvoice(ctx context.Context, userID int64,
 	// Save invoice - we save the invoice early to have a record in case the LN call fails
 	_, err = svc.DB.NewInsert().Model(&invoice).Exec(ctx)
 	if err != nil {
-		return nil, err
+		return nil, &responses.GeneralServerError
 	}
 
 	descriptionHash, err := hex.DecodeString(descriptionHashStr)
 	if err != nil {
-		return nil, err
+		return nil, &responses.GeneralServerError
 	}
 	// Initialize lnrpc invoice
 	lnInvoice := lnrpc.Invoice{
@@ -513,7 +553,8 @@ func (svc *LndhubService) AddIncomingInvoice(ctx context.Context, userID int64,
 	// Call LND
 	lnInvoiceResult, err := svc.LndClient.AddInvoice(ctx, &lnInvoice)
 	if err != nil {
-		return nil, err
+		svc.Logger.Errorf("Error creating invoice: user_id:%v error: %v", userID, err)
+		return nil, &responses.GeneralServerError
 	}
 
 	// Update the DB invoice with the data from the LND gRPC call
@@ -526,7 +567,7 @@ func (svc *LndhubService) AddIncomingInvoice(ctx context.Context, userID int64,
 
 	_, err = svc.DB.NewUpdate().Model(&invoice).WherePK().Exec(ctx)
 	if err != nil {
-		return nil, err
+		return nil, &responses.GeneralServerError
 	}
 
 	return &invoice, nil