fix(time): Remove polynomial regular expression (#769)

src/CoinbasePro.ts

@@ -79,7 +79,7 @@ export class CoinbasePro {
        */
       if (this.clockSkew === -1) {
         const time = await this.rest.time.getTime();
-        this.clockSkew = await this.rest.time.getClockSkew(time);
+        this.clockSkew = this.rest.time.getClockSkew(time);
       }
 
       return RequestSigner.signRequest(auth, setup, this.clockSkew);

src/time/TimeAPI.test.ts

@@ -35,23 +35,4 @@ describe('TimeAPI', () => {
       expect(time).toEqual(expected);
     });
   });
-
-  describe('getClockSkew', () => {
-    beforeEach(() => jasmine.clock().install());
-
-    afterEach(() => jasmine.clock().uninstall());
-
-    it('handles epochs sent as string', async () => {
-      const mockDate = new Date(1610486424105);
-      jasmine.clock().mockDate(mockDate);
-
-      const mockPayload = '{"iso":"2021-01-12T21:20:24Z","epoch":1610486424.}';
-
-      const timeApi = new TimeAPI(global.REST_URL);
-
-      const clockSkew = await timeApi.getClockSkew(mockPayload);
-
-      expect(clockSkew).toBe(-0.10500001907348633);
-    });
-  });
 });

src/time/TimeAPI.ts

@@ -31,10 +31,8 @@ export class TimeAPI {
   /**
    * Get the absolute difference between server time and local time.
    */
-  async getClockSkew(time: TimeSkew | string): Promise<number> {
-    /** @see https://github.com/bennycode/coinbase-pro-node/issues/354 */
-    const epoch = typeof time === 'string' ? parseFloat(time.match(/epoch":(.*)\./i)![1]) : time.epoch;
+  getClockSkew(time: TimeSkew): number {
     const now = Date.now() / 1000;
-    return epoch - now;
+    return time.epoch - now;
   }
 }