task(subscription): exclude fpn subs from tax enablement

Because:

* Do not update FPN subscriptions to Stripe automatic tax.

This commit:

* Adds isEligibleSubscriptionProduct method to check if the product of
  a subscription is eligible to update automatic tax.

Closes FXA-6811

packages/fxa-auth-server/scripts/convert-customers-to-stripe-automatic-tax/convert-customers-to-stripe-automatic-tax.ts

@@ -23,6 +23,7 @@ export class StripeAutomaticTaxConverter {
   private ipAddressMap: IpAddressMap;
   private helpers: StripeAutomaticTaxConverterHelpers;
   private stripeQueue: PQueue;
+  private ineligibleProducts: string[];
 
   /**
    * A converter to update all eligible customers to Stripe automatic tax
@@ -60,6 +61,8 @@ export class StripeAutomaticTaxConverter {
       fs.readFileSync(ipAddressMapFile, 'utf-8')
     );
     this.ipAddressMap = this.helpers.processIPAddressList(ipAddressList);
+
+    this.ineligibleProducts = ['prod_HEJ13uxjG4Rj6L', 'prod_HeWOjYtYcEjAzV'];
   }
 
   /**
@@ -132,6 +135,9 @@ export class StripeAutomaticTaxConverter {
     try {
       const product = await this.fetchProduct(plan.product as string);
 
+      const isExcludedProduct = this.isExcludedSubscriptionProduct(product.id);
+      if (isExcludedProduct) return; // Return early if subscription is for excluded product
+
       const customer = await this.fetchCustomer(customerId);
       if (!customer) return; // Do not enable tax for an invalid customer
 
@@ -216,6 +222,15 @@ export class StripeAutomaticTaxConverter {
     return isTaxEligible;
   }
 
+  /**
+   * Check if the subscriptions product is eligible to enable Tax
+   * @param productId
+   * @returns
+   */
+  isExcludedSubscriptionProduct(productId: string) {
+    return this.ineligibleProducts.includes(productId);
+  }
+
   /**
    * Updates a Stripe subscription with automatic tax enabled
    * @param subscriptionId Subscription to enable automatic tax for

packages/fxa-auth-server/test/scripts/convert-customers-to-stripe-automatic-tax.ts

@@ -227,6 +227,9 @@ describe('StripeAutomaticTaxConverter', () => {
         .resolves(mockCustomer);
       enableTaxForCustomer = sinon.stub().resolves(true);
       stripeAutomaticTaxConverter.enableTaxForCustomer = enableTaxForCustomer;
+      stripeAutomaticTaxConverter.isExcludedSubscriptionProduct = sinon
+        .stub()
+        .returns(false);
       enableTaxForSubscription = sinon.stub().resolves();
       stripeAutomaticTaxConverter.enableTaxForSubscription =
         enableTaxForSubscription;
@@ -291,6 +294,19 @@ describe('StripeAutomaticTaxConverter', () => {
         expect(enableTaxForSubscription.notCalled).true;
         expect(logStub.notCalled).true;
       });
+
+      it('does not update subscription for ineligible product', async () => {
+        stripeAutomaticTaxConverter.isExcludedSubscriptionProduct = sinon
+          .stub()
+          .returns(true);
+        await stripeAutomaticTaxConverter.generateReportForSubscription(
+          mockFirestoreSub
+        );
+
+        expect(enableTaxForCustomer.notCalled).true;
+        expect(enableTaxForSubscription.notCalled).true;
+        expect(logStub.notCalled).true;
+      });
     });
   });
 
@@ -436,6 +452,28 @@ describe('StripeAutomaticTaxConverter', () => {
     });
   });
 
+  describe('isEligibleSubscriptionProduct', () => {
+    let result: boolean;
+    const VALID_PRODUCT = 'valid';
+    const EXCLUDED_PRODUCT = 'prod_HEJ13uxjG4Rj6L';
+
+    it('returns false if the product is not excluded', () => {
+      result =
+        stripeAutomaticTaxConverter.isExcludedSubscriptionProduct(
+          VALID_PRODUCT
+        );
+      expect(result).false;
+    });
+
+    it('returns true if the product is meant to be excluded', () => {
+      result =
+        stripeAutomaticTaxConverter.isExcludedSubscriptionProduct(
+          EXCLUDED_PRODUCT
+        );
+      expect(result).true;
+    });
+  });
+
   describe('enableTaxForSubscription', () => {
     let updateStub: sinon.SinonStub;
     let retrieveStub: sinon.SinonStub;