Move Event, Address, AccountId, AccountIndex to generic (#1202)

* Move Event, Address, AccountId, AccountIndex to generic

* Move AccountId, AccountIndex, Address & Event to generic

* Move Vote

packages/rpc-core/src/cached.spec.ts

@@ -4,7 +4,7 @@
 
 import testingPairs from '@polkadot/keyring/testingPairs';
 import MockProvider from '@polkadot/rpc-provider/mock';
-import { AccountId } from '@polkadot/types';
+import { createType } from '@polkadot/types';
 
 import Rpc from '.';
 
@@ -32,7 +32,7 @@ describe('Cached Observables', (): void => {
 
   it('creates a single observable (multiple calls, different arguments that should be cached together)', (): void => {
     const observable1 = rpc.chain.subscribeNewHead(keyring.alice.address);
-    const observable2 = rpc.chain.subscribeNewHead(new AccountId(keyring.alice.address));
+    const observable2 = rpc.chain.subscribeNewHead(createType('AccountId', keyring.alice.address));
 
     expect(observable2).toBe(observable1);
   });

packages/rpc-core/src/index.ts

@@ -246,7 +246,7 @@ export default class Rpc implements RpcInterface {
       length: false,
       // Normalize args so that different args that should be cached
       // together are cached together.
-      // E.g.: `query.my.method('abc') === query.my.method(new AccountId('abc'));`
+      // E.g.: `query.my.method('abc') === query.my.method(createType('AccountId', 'abc'));`
       normalizer: JSON.stringify
     });