Refactor api-promise/rx (#566)

* Use a generic abstract OnCall

* Add OnCall for Promise

* First run at fixing extrinsics

* Fix types

* Make submittable extrinsic work

* Move file

* Make derive work

* Fix types

* Only call metadata once

* Make tests pass

* Put event emitter in apirx

* Fix small bugs

* Fix tests

* Fix bug decorateStorage

* Make tests pass for tx

* Move rpc base to apirx

* Fix lint

* Fix small bugs

* Fix bug with isSubscription

* Fix codeclimate

* Revert

* Add tslint disable line

* Fix lint

* Skip e2e

* Typo

* Lint

* Re-add combinator back

* Add ._rx in Base

* Make extrinsics work

* Update derivex

* Fix bug lint

* Fix circular dep

* Fix bug e2e

* Remove useless check

* Add description comment

* Clean stuff

* Move assert to Base

* Bump version, update CHANGELOG

* Make _rx private

* Private emit

packages/api-derive/src/index.ts

@@ -2,7 +2,7 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import ApiRx from '@polkadot/api/rx';
+import { ApiInterface$Rx } from '@polkadot/api/types';
 
 import * as balances from './balances';
 import * as chain from './chain';
@@ -28,7 +28,7 @@ export interface Derive {
   session: ReturnTypes<typeof session>;
 }
 
-export default function decorateDerive (api: ApiRx): Derive {
+export default function decorateDerive (api: ApiInterface$Rx): Derive {
   const derive = {} as Derive;
 
   Object.keys(functions).forEach((sectionName: string) => {