Use union type Order|SignedOrder

src/contract_wrappers/exchange_wrapper.ts

@@ -175,7 +175,7 @@ export class ExchangeWrapper extends ContractWrapper {
     /**
      * Cancel a given fill amount of an order. Cancellations are cumulative.
      */
-    public async cancelOrderAsync(order: Order, takerTokenCancelAmount: BigNumber.BigNumber): Promise<void> {
+    public async cancelOrderAsync(order: Order|SignedOrder, takerTokenCancelAmount: BigNumber.BigNumber): Promise<void> {
         assert.doesConformToSchema('order',
             SchemaValidator.convertToJSONSchemaCompatibleObject(order as object),
             orderSchema);
@@ -234,7 +234,7 @@ export class ExchangeWrapper extends ContractWrapper {
     /**
      * Computes the orderHash for a given order and returns it as a hex encoded string.
      */
-    public async getOrderHashAsync(order: Order): Promise<string> {
+    public async getOrderHashAsync(order: Order|SignedOrder): Promise<string> {
         const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(order);
         const exchangeInstance = await this.getExchangeContractAsync();
         const orderHash = utils.getOrderHashHex(order, exchangeInstance.address);

src/utils/utils.ts

@@ -4,7 +4,7 @@ import * as ethABI from 'ethereumjs-abi';
 import * as ethUtil from 'ethereumjs-util';
 import {orderSchema} from '../schemas/order_schemas';
 import {SchemaValidator} from './schema_validator';
-import {Order, SolidityTypes} from '../types';
+import {Order, SignedOrder, SolidityTypes} from '../types';
 import {assert} from './assert';
 import * as BigNumber from 'bignumber.js';
 
@@ -32,7 +32,7 @@ export const utils = {
     spawnSwitchErr(name: string, value: any) {
         return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
     },
-    getOrderHashHex(order: Order, exchangeContractAddr: string): string {
+    getOrderHashHex(order: Order|SignedOrder, exchangeContractAddr: string): string {
         assert.doesConformToSchema('order',
             SchemaValidator.convertToJSONSchemaCompatibleObject(order as object),
             orderSchema);