s/contract/contracts/ on applyOnEvent (#2712)

* s/contract/contracts/ on applyOnEvent

* Expose result classes

Author: jacogr

packages/api-contract/src/index.ts

@@ -1,6 +1,10 @@
 // Copyright 2017-2020 @polkadot/api-contract authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
+export { CodeSubmittableResult } from './base/Code';
+export { BlueprintSubmittableResult } from './base/Blueprint';
+
 export { default as Abi } from './Abi';
+
 export * from './rx';
 export * from './promise';

packages/api-contract/src/util.ts

@@ -16,7 +16,7 @@ export function formatData (registry: Registry, data: Raw, { type }: TypeDef): C
 
 export function applyOnEvent <T> (result: SubmittableResult, type: 'CodeStored' | 'Instantiated', fn: (record: EventRecord) => T): T | undefined {
   if (result.isInBlock || result.isFinalized) {
-    const record = result.findRecord('contract', type);
+    const record = result.findRecord('contracts', type);
 
     if (record) {
       return fn(record);