feat: WT-1766 Add new isSwapAvailable checkout sdk method (#959)

Co-authored-by: Deepti Luthra <[email protected]>

Author: sharonsheah

packages/checkout/sdk/src/Checkout.test.ts

@@ -45,6 +45,7 @@ import { FiatRampService } from './fiatRamp';
 import { FiatRampParams, ExchangeType } from './types/fiatRamp';
 import { getItemRequirementsFromRequirements } from './smartCheckout/itemRequirements';
 import { CheckoutErrorType } from './errors';
+import { availabilityService } from './availability';
 
 jest.mock('./connect');
 jest.mock('./network');
@@ -61,6 +62,7 @@ jest.mock('./smartCheckout/cancel');
 jest.mock('./smartCheckout');
 jest.mock('./fiatRamp');
 jest.mock('./smartCheckout/itemRequirements');
+jest.mock('./availability');
 
 describe('Connect', () => {
   let providerMock: ExternalProvider;
@@ -886,4 +888,23 @@ describe('Connect', () => {
       expect(feeEstimateMock).toBeCalledTimes(1);
     });
   });
+
+  describe('isSwapAvailable', () => {
+    let checkout: Checkout;
+
+    beforeEach(() => {
+      (availabilityService as jest.Mock).mockReturnValue({
+        checkDexAvailability: jest.fn().mockResolvedValue(true),
+      });
+      checkout = new Checkout({
+        baseConfig: { environment: Environment.PRODUCTION },
+      });
+    });
+
+    it('should call availability.checkDexAvailability', async () => {
+      await checkout.isSwapAvailable();
+
+      expect(checkout.availability.checkDexAvailability).toBeCalledTimes(1);
+    });
+  });
 });

packages/checkout/sdk/src/Checkout.ts

@@ -60,6 +60,7 @@ import { CancelParams } from './types/cancel';
 import { FiatRampService, FiatRampWidgetParams } from './fiatRamp';
 import { getItemRequirementsFromRequirements } from './smartCheckout/itemRequirements';
 import { CheckoutError, CheckoutErrorType } from './errors';
+import { AvailabilityService, availabilityService } from './availability';
 
 const SANDBOX_CONFIGURATION = {
   baseConfig: {
@@ -74,6 +75,8 @@ export class Checkout {
 
   private readOnlyProviders: Map<ChainId, ethers.providers.JsonRpcProvider>;
 
+  readonly availability: AvailabilityService;
+
   /**
    * Constructs a new instance of the CheckoutModule class.
    * @param {CheckoutModuleConfiguration} [config=SANDBOX_CONFIGURATION] - The configuration object for the CheckoutModule.
@@ -84,6 +87,7 @@ export class Checkout {
     this.config = new CheckoutConfiguration(config);
     this.fiatRampService = new FiatRampService(this.config);
     this.readOnlyProviders = new Map<ChainId, ethers.providers.JsonRpcProvider>();
+    this.availability = availabilityService(this.config.isDevelopment, this.config.isProduction);
   }
 
   /**
@@ -472,4 +476,12 @@ export class Checkout {
   public async getExchangeFeeEstimate(): Promise<OnRampProviderFees> {
     return await this.fiatRampService.feeEstimate();
   }
+
+  /**
+   * Fetches Swap widget availability.
+   * @returns {Promise<boolean>} - A promise that resolves to a boolean.
+   */
+  public async isSwapAvailable(): Promise<boolean> {
+    return this.availability.checkDexAvailability();
+  }
 }