fix: handles decimal points in fiat currency

app/api/subscriptions/route.ts

@@ -27,9 +27,13 @@ export async function POST(request: Request) {
     const { amount, nostrWalletConnectUrl, sleepDuration, cronExpression } =
       createSubscriptionRequest;
 
+    // Validate amount based on currency type
+    const isSatsCurrency = createSubscriptionRequest.currency === SATS_CURRENCY;
+    const numAmount = isSatsCurrency ? parseInt(amount) : parseFloat(amount);
+
     if (
       (!sleepDuration && !cronExpression) ||
-      !isValidPositiveValue(parseInt(amount)) ||
+      !isValidPositiveValue(numAmount) ||
       !isValidNostrWalletConnectUrl(nostrWalletConnectUrl)
     ) {
       return new Response("One or more invalid subscription fields", {
@@ -70,7 +74,8 @@ export async function POST(request: Request) {
       }
     }
 
-    let satoshi = +amount;
+    // Use the correctly parsed amount based on currency type
+    let satoshi = numAmount;
     if (
       createSubscriptionRequest.currency &&
       createSubscriptionRequest.currency !== SATS_CURRENCY
@@ -87,7 +92,7 @@ export async function POST(request: Request) {
       }
 
       satoshi = await fiat.getSatoshiValue({
-        amount: createSubscriptionRequest.amount,
+        amount: parseFloat(createSubscriptionRequest.amount),
         currency: createSubscriptionRequest.currency,
       });
     }
@@ -105,8 +110,8 @@ export async function POST(request: Request) {
 
     const subscription = await prismaClient.subscription.create({
       data: {
-        amount: parseInt(createSubscriptionRequest.amount),
-        currency: createSubscriptionRequest.currency,
+        amount: Math.round(satoshi),
+        currency: SATS_CURRENCY, // Always store as SATS since amount is in sats
         recipientLightningAddress:
           createSubscriptionRequest.recipientLightningAddress,
         message: createSubscriptionRequest.message,

app/confirm/components/SubscriptionSummary.tsx

@@ -1,7 +1,7 @@
 import React from "react";
 import { formatDistance, add, max } from "date-fns";
 import ms from "ms";
-import { MAX_RETRIES } from "lib/constants";
+import { MAX_RETRIES, SATS_CURRENCY } from "lib/constants";
 
 type SubscriptionSummaryProps = {
   values: {
@@ -36,7 +36,9 @@ export function SubscriptionSummary({
         right={
           <div>
             <span className="mono">
-              {parseInt(values.amount).toLocaleString()}
+              {values.currency === SATS_CURRENCY
+                ? parseInt(values.amount).toLocaleString()
+                : parseFloat(values.amount).toLocaleString()}
             </span>{" "}
             {values.currency}
           </div>
@@ -145,7 +147,10 @@ export function SubscriptionSummary({
         <SubscriptionSummaryItem
           left={`Total ${values.currency} sent`}
           right={`${
-            (values.numSuccessfulPayments || 0) * parseInt(values.amount)
+            (values.numSuccessfulPayments || 0) *
+            (values.currency === SATS_CURRENCY
+              ? parseInt(values.amount)
+              : parseFloat(values.amount))
           }`}
         />
       )}

app/create/components/CreateSubscriptionForm.tsx

@@ -240,9 +240,25 @@ export function CreateSubscriptionForm() {
             <input
               {...register("amount", {
                 validate: (value) => {
-                  return !isValidPositiveValue(parseInt(value))
-                    ? "Please enter a positive value"
-                    : undefined;
+                  // Use parseInt for sats (no decimals), parseFloat for fiat currencies
+                  const numValue =
+                    watchedCurrency === SATS_CURRENCY
+                      ? parseInt(value)
+                      : parseFloat(value);
+
+                  if (!isValidPositiveValue(numValue)) {
+                    return "Please enter a positive value";
+                  }
+
+                  // Additional validation for sats to prevent decimals
+                  if (
+                    watchedCurrency === SATS_CURRENCY &&
+                    value.includes(".")
+                  ) {
+                    return "Millisatoshis (msat) are not supported. Please enter a whole number of sats.";
+                  }
+
+                  return undefined;
                 },
               })}
               className="zp-input flex-1"