feat(paymaster): add paidUntil recharge logic

Author: e11sy

lib/utils/hasValue.ts

@@ -1,5 +1,6 @@
 /**
  * Returns true if specified value is not undefined, null and empty string
+ *
  * @param v - value to check
  */
 export function hasValue<T>(v: T | undefined | null): v is T {

workers/paymaster/src/index.ts

@@ -80,6 +80,22 @@ export default class PaymasterWorker extends Worker {
     return now >= expectedPayDay.getTime();
   }
 
+  /**
+   * Method that returns date of the last charge date + 1 month
+   *
+   * It is used to recharge prepaid workspaces
+   *
+   * @param date - last charge date
+   * @returns - last charge date + 1 month
+   */
+  private static monthSinceLastChargeDate(date: Date): Date {
+    const monthSinceLastChargeDate = new Date(date.getTime());
+
+    monthSinceLastChargeDate.setMonth(monthSinceLastChargeDate.getMonth() + 1);
+
+    return monthSinceLastChargeDate;
+  }
+
   /**
    * Returns difference between now and payday in days
    *
@@ -214,6 +230,11 @@ export default class PaymasterWorker extends Worker {
     // @ts-expect-error debug
     const isTimeToPay = PaymasterWorker.isTimeToPay(workspace.lastChargeDate, workspace.paidUntil, workspace.isDebug);
 
+    /**
+     * Date one month after last charge date
+     */
+    const monthSinceLastChargeDate: Date = PaymasterWorker.monthSinceLastChargeDate(workspace.lastChargeDate);
+
     /**
      * How many days have passed since payments the expected day of payments
      */
@@ -237,7 +258,17 @@ export default class PaymasterWorker extends Worker {
      */
     if (!isTimeToPay) {
       /**
-       * If workspace was manually unblocked (reset of billingPeriodEventsCount and lastChargeDate) in db
+       * If month since last charge date passed, but it is still not time to pay - then workspace has prepaid period
+       * Start new month - recharge billing period events count and update last charge date
+       */
+      if (date >= monthSinceLastChargeDate) {
+        await this.updateLastChargeDate(workspace, date);
+        await this.clearBillingPeriodEventsCount(workspace);
+      }
+
+      /**
+       * If workspace is blocked, but it is not time to pay
+       * This case could be reached by prepaid workspaces and manually recharged ones
        */
       if (workspace.isBlocked) {
         await this.unblockWorkspace(workspace);