fix usage value

apps/web/src/lib/usage.ts

@@ -1,5 +1,10 @@
 import { EmailUsageType, Plan } from "@prisma/client";
 
+export const USAGE_UNIT_PRICE: Record<EmailUsageType, number> = {
+  [EmailUsageType.MARKETING]: 0.001,
+  [EmailUsageType.TRANSACTIONAL]: 0.0004,
+};
+
 /**
  * Unit price for unsend
  * 1 marketing email = 1 unit
@@ -7,6 +12,9 @@ import { EmailUsageType, Plan } from "@prisma/client";
  */
 export const UNIT_PRICE = 0.001;
 
+export const TRANSACTIONAL_UNIT_CONVERSION =
+  UNIT_PRICE / USAGE_UNIT_PRICE[EmailUsageType.TRANSACTIONAL];
+
 /**
  * Number of credits per plan
  * Credits are the units of measurement for email sending capacity.
@@ -17,11 +25,6 @@ export const PLAN_CREDIT_UNITS = {
   [Plan.BASIC]: 10_000,
 };
 
-export const USAGE_UNIT_PRICE: Record<EmailUsageType, number> = {
-  [EmailUsageType.MARKETING]: 0.001,
-  [EmailUsageType.TRANSACTIONAL]: 0.0004,
-};
-
 /**
  * Gets timestamp for usage reporting, set to yesterday's date
  * Converts to Unix timestamp (seconds since epoch)
@@ -55,12 +58,17 @@ export function getUsageUinits(
   marketingUsage: number,
   transactionUsage: number
 ) {
-  return marketingUsage + Math.floor(transactionUsage / 4);
+  return (
+    marketingUsage +
+    Math.floor(transactionUsage / TRANSACTIONAL_UNIT_CONVERSION)
+  );
 }
 
 export function getCost(usage: number, type: EmailUsageType) {
   const calculatedUsage =
-    type === EmailUsageType.MARKETING ? usage : Math.floor(usage / 4);
+    type === EmailUsageType.MARKETING
+      ? usage
+      : Math.floor(usage / TRANSACTIONAL_UNIT_CONVERSION);
 
   return calculatedUsage * UNIT_PRICE;
 }

apps/web/src/server/jobs/usage-job.ts

@@ -71,7 +71,7 @@ const worker = new Worker(
 await usageQueue.upsertJobScheduler(
   "daily-usage-report",
   {
-    pattern: "0 0 * * *", // Run every day at 12 AM
+    pattern: "0 */12 * * *", // Run every 12 hours (at 00:00, 12:00 UTC)
     tz: "UTC",
   },
   {