Add payinvoice endpoint

controllers/payinvoice.ctrl.go

@@ -1,6 +1,8 @@
 package controllers
 
 import (
+	"context"
+	"fmt"
 	"net/http"
 
 	"github.com/getAlby/lndhub.go/lib/service"
@@ -18,23 +20,71 @@ func NewPayInvoiceController(svc *service.LndhubService) *PayInvoiceController {
 
 // PayInvoice : Pay invoice Controller
 func (controller *PayInvoiceController) PayInvoice(c echo.Context) error {
-	userId := c.Get("UserID").(int64)
+	userID := c.Get("UserID").(int64)
 	var reqBody struct {
 		Invoice string `json:"invoice" validate:"required"`
 		Amount  int    `json:"amount" validate:"omitempty,gte=0"`
 	}
 
 	if err := c.Bind(&reqBody); err != nil {
+		c.Logger().Errorf("Failed to load payinvoice request body: %v", err)
 		return c.JSON(http.StatusBadRequest, echo.Map{
-			"message": "failed to bind json",
+			"error":   true,
+			"code":    8,
+			"message": "Bad arguments",
 		})
 	}
 
 	if err := c.Validate(&reqBody); err != nil {
+		c.Logger().Errorf("Invalid payinvoice request body: %v", err)
 		return c.JSON(http.StatusBadRequest, echo.Map{
-			"message": "invalid request",
+			"error":   true,
+			"code":    8,
+			"message": "Bad arguments",
 		})
 	}
-	//TODO json response
-	return controller.svc.Payinvoice(userId, reqBody.Invoice)
+
+	paymentRequest := reqBody.Invoice
+	decodedPaymentRequest, err := controller.svc.DecodePaymentRequest(paymentRequest)
+	if err != nil {
+		return c.JSON(http.StatusBadRequest, echo.Map{
+			"error":   true,
+			"code":    8,
+			"message": "Bad arguments",
+		})
+	}
+	c.Logger().Info("%v", decodedPaymentRequest)
+
+	invoice, err := controller.svc.AddOutgoingInvoice(userID, paymentRequest, *decodedPaymentRequest)
+	if err != nil {
+		c.Logger().Errorf("Error creating invoice: %v", err)
+		// TODO: sentry notification
+		return c.JSON(http.StatusInternalServerError, nil)
+	}
+
+	currentBalance, err := controller.svc.CurrentUserBalance(context.TODO(), userID)
+	if err != nil {
+		return err
+	}
+
+	if currentBalance < invoice.Amount {
+		c.Logger().Errorf("User does not have enough balance invoice_id=%v user_id=%v balance=%v amount=%v", invoice.ID, userID, currentBalance, invoice.Amount)
+
+		return c.JSON(http.StatusBadRequest, echo.Map{
+			"error":   true,
+			"code":    2,
+			"message": fmt.Sprintf("not enough balance (%v). Make sure you have at least 1%% reserved for potential fees", currentBalance),
+		})
+	}
+
+	entry, err := controller.svc.PayInvoice(invoice)
+	if err != nil {
+		c.Logger().Errorf("Failed: %v", err)
+		return c.JSON(http.StatusBadRequest, echo.Map{
+			"error":   true,
+			"code":    10,
+			"message": fmt.Sprintf("Payment failed. Does the receiver have enough inbound capacity? (%v)", err),
+		})
+	}
+	return c.JSON(http.StatusOK, &entry)
 }