feat: link discount to mail receipts

packages/server/src/services/Sales/Estimates/GetSaleEstimateMailStateTransformer.ts

@@ -20,6 +20,16 @@ export class GetSaleEstimateMailStateTransformer extends SaleEstimateTransfromer
       'subtotal',
       'subtotalFormatted',
 
+      'discountAmount',
+      'discountAmountFormatted',
+      'discountPercentage',
+      'discountPercentageFormatted',
+      'discountLabel',
+
+      'adjustment',
+      'adjustmentFormatted',
+      'adjustmentLabel',
+
       'estimateNumber',
       'entries',
 
@@ -97,6 +107,17 @@ export class GetSaleEstimateMailStateTransformer extends SaleEstimateTransfromer
     return estimate.amount;
   }
 
+  /**
+   * Retrieves the discount label of the estimate.
+   * @param estimate
+   * @returns {string}
+   */
+  protected discountLabel(estimate) {
+    return estimate.discountType === 'percentage'
+      ? `Discount [${estimate.discountPercentageFormatted}]`
+      : 'Discount';
+  }
+
   /**
    * Retrieves the formatted total of the estimate.
    * @param estimate