Update exchange rate every 15 minutes

Author: arch-wiki

src/action/wallet.js

@@ -113,7 +113,7 @@ class WalletAction {
       this.getBalance(),
       this.getChannelBalance(),
       this.getNewAddress(),
-      this.getExchangeRate(),
+      this.pollExchangeRate(),
     ]);
   }
 
@@ -279,6 +279,18 @@ class WalletAction {
     }
   }
 
+  /**
+   * Poll for the current btc/fiat exchange rate based on the currently selected
+   * fiat currency every 15 minutes.
+   * @return {Promise<undefined>}
+   */
+  async pollExchangeRate() {
+    // Poll every 15 minutes, starting now.
+    await this.getExchangeRate();
+    let interval = 15 * 60 * 1000;
+    setInterval(() => this.getExchangeRate(), interval);
+  }
+
   /**
    * Fetch a current btc/fiat exchange rate based on the currently selected
    * fiat currency and persist the value on disk for the next time the app

test/unit/action/wallet.spec.js

@@ -106,10 +106,10 @@ describe('Action Wallet Unit Tests', () => {
 
   describe('update()', () => {
     it('should refresh balances, exchange rate and address', async () => {
-      sandbox.stub(wallet, 'getExchangeRate');
+      sandbox.stub(wallet, 'pollExchangeRate');
       await wallet.update();
       expect(grpc.sendCommand, 'was called thrice');
-      expect(wallet.getExchangeRate, 'was called once');
+      expect(wallet.pollExchangeRate, 'was called once');
     });
   });
 
@@ -324,6 +324,14 @@ describe('Action Wallet Unit Tests', () => {
     });
   });
 
+  describe('pollExchangeRate()', () => {
+    it('should call getExchangeRate', async () => {
+      sandbox.stub(wallet, 'getExchangeRate');
+      await wallet.pollExchangeRate();
+      expect(wallet.getExchangeRate, 'was called once');
+    });
+  });
+
   describe('getExchangeRate()', () => {
     it('should get exchange rate', async () => {
       nock('https://blockchain.info')