refund and delayed charge

backend/models/Rental.js

@@ -43,18 +43,10 @@ const Rental = sequelize.define("Rental", {
     type: DataTypes.DECIMAL(10, 2),
     allowNull: false,
   },
-  baseRentalAmount: {
-    type: DataTypes.DECIMAL(10, 2),
-    allowNull: false,
-  },
   platformFee: {
     type: DataTypes.DECIMAL(10, 2),
     allowNull: false,
   },
-  processingFee: {
-    type: DataTypes.DECIMAL(10, 2),
-    allowNull: false,
-  },
   payoutAmount: {
     type: DataTypes.DECIMAL(10, 2),
     allowNull: false,
@@ -83,6 +75,28 @@ const Rental = sequelize.define("Rental", {
   stripeTransferId: {
     type: DataTypes.STRING,
   },
+  // Refund tracking fields
+  refundAmount: {
+    type: DataTypes.DECIMAL(10, 2),
+  },
+  refundProcessedAt: {
+    type: DataTypes.DATE,
+  },
+  refundReason: {
+    type: DataTypes.TEXT,
+  },
+  stripeRefundId: {
+    type: DataTypes.STRING,
+  },
+  cancelledBy: {
+    type: DataTypes.ENUM("renter", "owner"),
+  },
+  cancelledAt: {
+    type: DataTypes.DATE,
+  },
+  stripePaymentMethodId: {
+    type: DataTypes.STRING,
+  },
   deliveryMethod: {
     type: DataTypes.ENUM("pickup", "delivery"),
     defaultValue: "pickup",