HttpProvider support clone() (#3949)

* HttpProvider support clone()

* fix lint

packages/rpc-provider/src/http/index.spec.ts

@@ -29,6 +29,14 @@ describe('Http', (): void => {
     ).not.toThrow();
   });
 
+  it('allow clone', (): void => {
+    const clone = http.clone();
+    /* eslint-disable */
+    expect((clone as any)['#endpoint']).toEqual((http as any)['#endpoint']);
+    expect((clone as any)['#headers']).toEqual((http as any)['#headers']);
+    /* eslint-enable */
+  });
+
   it('always returns isConnected true', (): void => {
     expect(http.isConnected).toEqual(true);
   });

packages/rpc-provider/src/http/index.ts

@@ -62,7 +62,7 @@ export class HttpProvider implements ProviderInterface {
    * @description Returns a clone of the object
    */
   public clone (): HttpProvider {
-    throw new Error('Unimplemented');
+    return new HttpProvider(this.#endpoint, this.#headers);
   }
 
   /**