[REF] Changelly: using stablecoin_api for stablecoin swaps

Author: gabrielbazan7

packages/bitcore-wallet-service/src/config.ts

@@ -456,6 +456,7 @@ const Config = (): any => {
     //   },
     //   v2: {
     //     secret: 'changelly_secret_v2',
+    //     secret_stablecoin: 'changelly_secret_stablecoin_v2'
     //     api: 'https://api.changelly.com/v2'
     //   }
     // },

packages/bitcore-wallet-service/src/externalservices/changelly.ts

@@ -9,7 +9,14 @@ import { checkRequired } from '../lib/server';
 export class ChangellyService {
   request: any = request;
 
-  private changellyGetKeysV2(_req) {
+  changellyGetKeysV2(req) {
+
+    const stablecoins = [
+      'usdt20', 'usdtarb', 'usdtop', 'usdtpolygon', 'usdtsol',
+      'usdcmatic', 'usdcarb', 'usdcbase', 'usdcop', 'usdcsol',
+      'daipolygon'
+    ];
+
     if (!config.changelly) {
       logger.warn('Changelly missing credentials');
       throw new Error('ClientError: Service not configured.');
@@ -18,9 +25,15 @@ export class ChangellyService {
       throw new Error('ClientError: Service v2 not configured.');
     }
 
+    const { api, secret, secret_stablecoin } = config.changelly.v2;
+
+    const apiKey = stablecoins.includes(req.body.coinFrom)
+      ? (secret_stablecoin ?? secret)
+      : secret;
+    
     const keys = {
-      API: config.changelly.v2.api,
-      SECRET: config.changelly.v2.secret
+      API: api,
+      SECRET: apiKey
     };
 
     return keys;

packages/bitcore-wallet-service/test/integration/externalservices/changelly.test.ts

@@ -43,7 +43,8 @@ describe('Changelly integration', () => {
       },
       v2: {
         secret: privateKey.toString('hex'),
-        api: 'apiV2'
+        secret_stablecoin: 'changelly_secret_stablecoin_v2',
+        api: 'apiV2',
       }
     };
 
@@ -70,6 +71,32 @@ describe('Changelly integration', () => {
     await helpers.after();
   });
 
+  describe('#Changelly API key selection', () => {
+    it('should use stablecoin API key for stablecoin swaps', () => {
+      const stablecoins = [
+        'usdt20', 'usdtarb', 'usdtop', 'usdtpolygon', 'usdtsol',
+        'usdcmatic', 'usdcarb', 'usdcbase', 'usdcop', 'usdcsol',
+        'daipolygon'
+      ];
+  
+      for (const coin of stablecoins) {
+        const req = {
+          body: { coinFrom: coin }
+        };
+        const keys = server.externalServices.changelly.changellyGetKeysV2(req);
+        keys.SECRET.should.equal(config.changelly.v2.secret_stablecoin);
+        keys.API.should.equal(config.changelly.v2.api);
+      }
+
+      const req = {
+        body: { coinFrom: 'xxx' }
+      };
+      const keys = server.externalServices.changelly.changellyGetKeysV2(req);
+      keys.SECRET.should.equal(config.changelly.v2.secret);
+      keys.API.should.equal(config.changelly.v2.api);
+    });
+  });
+
   describe('#changellyGetCurrencies', () => {
     beforeEach(() => {
       req = {