4 files changed, 23 insertions, 23 deletions
diff --git a/packages/order-watcher/src/artifacts.ts b/packages/order-watcher/src/artifacts.ts
deleted file mode 100644
index 520066a24..000000000
--- a/packages/order-watcher/src/artifacts.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { ContractArtifact } from 'ethereum-types';
-
-import * as ERC20Token from './artifacts/ERC20Token.json';
-import * as ERC721Token from './artifacts/ERC721Token.json';
-import * as Exchange from './artifacts/Exchange.json';
-import * as WETH9 from './artifacts/WETH9.json';
-
-export const artifacts = {
-    ERC20Token: (ERC20Token as any) as ContractArtifact,
-    ERC721Token: (ERC721Token as any) as ContractArtifact,
-    Exchange: (Exchange as any) as ContractArtifact,
-    EtherToken: (WETH9 as any) as ContractArtifact,
-};
diff --git a/packages/order-watcher/src/globals.d.ts b/packages/order-watcher/src/globals.d.ts
deleted file mode 100644
index 94e63a32d..000000000
--- a/packages/order-watcher/src/globals.d.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-declare module '*.json' {
-    const json: any;
-    /* tslint:disable */
-    export default json;
-    /* tslint:enable */
-}
diff --git a/packages/order-watcher/src/index.ts b/packages/order-watcher/src/index.ts
index d2f91eab1..6e862a427 100644
--- a/packages/order-watcher/src/index.ts
+++ b/packages/order-watcher/src/index.ts
@@ -7,10 +7,12 @@ export {
     OrderState,
     ExchangeContractErrs,
     OrderRelevantState,
+    Stats,
 } from '@0xproject/types';
 
 export { OnOrderStateChangeCallback, OrderWatcherConfig } from './types';
 
+export { ContractAddresses } from '@0xproject/contract-addresses';
 export { SignedOrder } from '@0xproject/types';
 export {
     JSONRPCRequestPayload,
diff --git a/packages/order-watcher/src/order_watcher/order_watcher.ts b/packages/order-watcher/src/order_watcher/order_watcher.ts
index f9a63efe3..2f0dd2f2d 100644
--- a/packages/order-watcher/src/order_watcher/order_watcher.ts
+++ b/packages/order-watcher/src/order_watcher/order_watcher.ts
@@ -1,4 +1,6 @@
 // tslint:disable:no-unnecessary-type-assertion
+import { ContractAddresses } from '@0xproject/contract-addresses';
+import * as artifacts from '@0xproject/contract-artifacts';
 import {
     AssetBalanceAndProxyAllowanceFetcher,
     ContractWrappers,
@@ -30,12 +32,11 @@ import {
     orderHashUtils,
     OrderStateUtils,
 } from '@0xproject/order-utils';
-import { AssetProxyId, ExchangeContractErrs, OrderState, SignedOrder } from '@0xproject/types';
+import { AssetProxyId, ExchangeContractErrs, OrderState, SignedOrder, Stats } from '@0xproject/types';
 import { errorUtils, intervalUtils } from '@0xproject/utils';
 import { BlockParamLiteral, LogEntryEvent, LogWithDecodedArgs, Provider } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { orderWatcherPartialConfigSchema } from '../schemas/order_watcher_partial_config_schema';
 import { OnOrderStateChangeCallback, OrderWatcherConfig, OrderWatcherError } from '../types';
 import { assert } from '../utils/assert';
@@ -91,11 +92,14 @@ export class OrderWatcher {
      * Instantiate a new OrderWatcher
      * @param provider Web3 provider to use for JSON RPC calls
      * @param networkId NetworkId to watch orders on
+     * @param contractAddresses Optional contract addresses. Defaults to known
+     * addresses based on networkId.
      * @param partialConfig Optional configurations
      */
     constructor(
         provider: Provider,
         networkId: number,
+        contractAddresses?: ContractAddresses,
         partialConfig: Partial<OrderWatcherConfig> = DEFAULT_ORDER_WATCHER_CONFIG,
     ) {
         assert.isWeb3Provider('provider', provider);
@@ -110,9 +114,14 @@ export class OrderWatcher {
         this._collisionResistantAbiDecoder = new CollisionResistanceAbiDecoder(
             artifacts.ERC20Token.compilerOutput.abi,
             artifacts.ERC721Token.compilerOutput.abi,
-            [artifacts.EtherToken.compilerOutput.abi, artifacts.Exchange.compilerOutput.abi],
+            [artifacts.WETH9.compilerOutput.abi, artifacts.Exchange.compilerOutput.abi],
         );
-        const contractWrappers = new ContractWrappers(provider, { networkId });
+        const contractWrappers = new ContractWrappers(provider, {
+            networkId,
+            // Note(albrow): We let the contract-wrappers package handle
+            // default values for contractAddresses.
+            contractAddresses,
+        });
         this._eventWatcher = new EventWatcher(provider, config.eventPollingIntervalMs, STATE_LAYER, config.isVerbose);
         const balanceAndProxyAllowanceFetcher = new AssetBalanceAndProxyAllowanceFetcher(
             contractWrappers.erc20Token,
@@ -213,6 +222,14 @@ export class OrderWatcher {
         this._expirationWatcher.unsubscribe();
         intervalUtils.clearAsyncExcludingInterval(this._cleanupJobIntervalIdIfExists);
     }
+    /**
+     * Gets statistics of the OrderWatcher Instance.
+     */
+    public getStats(): Stats {
+        return {
+            orderCount: _.size(this._orderByOrderHash),
+        };
+    }
     private async _cleanupAsync(): Promise<void> {
         for (const orderHash of _.keys(this._orderByOrderHash)) {
             this._cleanupOrderRelatedState(orderHash);