failed payment method handling

backend/migrations/20260105000001-add-payment-failure-tracking.js

@@ -0,0 +1,30 @@
+"use strict";
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    // Add paymentFailedNotifiedAt - tracks when owner notified renter about failed payment
+    await queryInterface.addColumn("Rentals", "paymentFailedNotifiedAt", {
+      type: Sequelize.DATE,
+      allowNull: true,
+    });
+
+    // Add paymentMethodUpdatedAt - tracks last payment method update for rate limiting
+    await queryInterface.addColumn("Rentals", "paymentMethodUpdatedAt", {
+      type: Sequelize.DATE,
+      allowNull: true,
+    });
+
+    // Add paymentMethodUpdateCount - count of updates within time window for rate limiting
+    await queryInterface.addColumn("Rentals", "paymentMethodUpdateCount", {
+      type: Sequelize.INTEGER,
+      allowNull: true,
+      defaultValue: 0,
+    });
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.removeColumn("Rentals", "paymentMethodUpdateCount");
+    await queryInterface.removeColumn("Rentals", "paymentMethodUpdatedAt");
+    await queryInterface.removeColumn("Rentals", "paymentFailedNotifiedAt");
+  },
+};