added error for too long messages

backends/lnd.go

@@ -59,19 +59,11 @@ func (lnd *LND) Connect() error {
 func (lnd *LND) GetInvoice(message string, amount int64, expiry int64) (invoice string, err error) {
 	var response *lnrpc.AddInvoiceResponse
 
-	if message != "" {
-		response, err = lnd.client.AddInvoice(lnd.ctx, &lnrpc.Invoice{
-			Memo:   message,
-			Value:  amount,
-			Expiry: expiry,
-		})
-
-	} else {
-		response, err = lnd.client.AddInvoice(lnd.ctx, &lnrpc.Invoice{
-			Value:  amount,
-			Expiry: expiry,
-		})
-	}
+	response, err = lnd.client.AddInvoice(lnd.ctx, &lnrpc.Invoice{
+		Memo:   message,
+		Value:  amount,
+		Expiry: expiry,
+	})
 
 	if err != nil {
 		return "", err

frontend/lightningTip.css

@@ -1,4 +1,21 @@
 /* TODO: add light theme */
+#lightningTip {
+    width: 12em;
+
+    padding: 1em;
+
+    background-color: #212121;
+
+    border-radius: 4px;
+
+    color: #F5F5F5;
+
+    font-size: 20px;
+    font-family: Arial, Helvetica, sans-serif;
+
+    text-align: center;
+}
+
 .lightningTipInput {
     width: 100%;
 
@@ -47,23 +64,6 @@
     border: 0;
 }
 
-#lightningTip {
-    width: 12em;
-
-    padding: 1em;
-
-    background-color: #212121;
-
-    border-radius: 4px;
-
-    color: #F5F5F5;
-
-    font-size: 20px;
-    font-family: Arial, Helvetica, sans-serif;
-
-    text-align: center;
-}
-
 #lightningTipLogo {
     margin-top: 0;
     margin-bottom: 0.6em;

frontend/lightningTip.js

@@ -40,11 +40,12 @@ window.onload = function () {
 
     button.style.height = (button.clientHeight + 1) + "px";
     button.style.width = (button.clientWidth + 1) + "px";
+
+    resizeInput(document.getElementById("lightningTipMessage"))
 };
 
 // TODO: show invoice even if JavaScript is disabled
 // TODO: fix scaling on phones
-// TODO: optimize creating bigger QR codes
 // TODO: show price in dollar?
 function getInvoice() {
     if (running === false) {
@@ -320,6 +321,6 @@ function resizeInput(element) {
 
     // Change the size only if
     if (element.clientHeight !== element.scrollHeight) {
-        element.style.height = (element.scrollHeight) + "px";
+        element.style.height = element.scrollHeight + "px";
     }
 }

lightningtip.go

@@ -213,7 +213,6 @@ func getInvoiceHandler(writer http.ResponseWriter, request *http.Request) {
 			if body.Amount != 0 {
 				invoice, err := backend.GetInvoice(body.Message, body.Amount, cfg.TipExpiry)
 
-				// TODO: handle too long messages better
 				if err == nil {
 					logMessage := "Created invoice with amount of " + strconv.FormatInt(body.Amount, 10) + " satoshis"
 
@@ -245,6 +244,13 @@ func getInvoiceHandler(writer http.ResponseWriter, request *http.Request) {
 
 				} else {
 					errorMessage = "Failed to create invoice"
+
+					// This is way to hacky
+					// Maybe a cast to the gRPC error and get its error message directly
+					if fmt.Sprint(err)[:47] == "rpc error: code = Unknown desc = memo too large" {
+						errorMessage += ": message too long"
+					}
+
 				}
 
 			}