Create server entry point and Dockerfile for OrderWatcher

packages/order-watcher/Dockerfile

@@ -0,0 +1,13 @@
+FROM node
+
+WORKDIR /order-watcher
+
+COPY package.json .
+RUN npm i
+RUN npm install forever -g
+
+COPY . .
+
+EXPOSE 8080
+
+CMD ["forever", "./lib/src/server.js"]

packages/order-watcher/package.json

@@ -36,6 +36,7 @@
         "@0x/dev-utils": "^1.0.21",
         "@0x/migrations": "^2.2.2",
         "@0x/tslint-config": "^2.0.0",
+        "@0x/subproviders": "^2.1.8",
         "@types/bintrees": "^1.0.2",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",

packages/order-watcher/src/server.ts

@@ -0,0 +1,44 @@
+import { getContractAddressesForNetworkOrThrow } from '@0x/contract-addresses';
+import { RPCSubprovider, Web3ProviderEngine } from '@0x/subproviders';
+import * as _ from 'lodash';
+
+import { OrderWatcherWebSocketServer } from './order_watcher/order_watcher_web_socket_server';
+
+const GANACHE_NETWORK_ID = 50;
+const DEFAULT_RPC_URL = 'http://localhost:8545';
+
+const provider = new Web3ProviderEngine();
+const jsonRpcUrl = process.env.JSON_RPC_URL || DEFAULT_RPC_URL;
+const rpcSubprovider = new RPCSubprovider(jsonRpcUrl);
+provider.addProvider(rpcSubprovider);
+provider.start();
+
+const networkId = process.env.NETWORK_ID !== undefined ? _.parseInt(process.env.NETWORK_ID) : GANACHE_NETWORK_ID;
+
+const contractAddressesString = process.env.contractAddresses;
+const contractAddressesIfExists =
+    contractAddressesString === undefined
+        ? getContractAddressesForNetworkOrThrow(networkId)
+        : JSON.parse(contractAddressesString);
+
+const orderWatcherConfig: any = {
+    isVerbose: process.env.IS_VERBOSE === 'true',
+};
+const orderExpirationCheckingIntervalMs = process.env.ORDER_EXPIRATION_CHECKING_INTERVAL_MS;
+if (orderExpirationCheckingIntervalMs !== undefined) {
+    orderWatcherConfig.orderExpirationCheckingIntervalMs = _.parseInt(orderExpirationCheckingIntervalMs);
+}
+const eventPollingIntervalMs = process.env.EVENT_POLLING_INTERVAL_MS;
+if (eventPollingIntervalMs !== undefined) {
+    orderWatcherConfig.eventPollingIntervalMs = _.parseInt(eventPollingIntervalMs);
+}
+const expirationMarginMs = process.env.EXPIRATION_MARGIN_MS;
+if (expirationMarginMs !== undefined) {
+    orderWatcherConfig.expirationMarginMs = _.parseInt(expirationMarginMs);
+}
+const cleanupJobIntervalMs = process.env.CLEANUP_JOB_INTERVAL_MS;
+if (cleanupJobIntervalMs !== undefined) {
+    orderWatcherConfig.cleanupJobIntervalMs = _.parseInt(cleanupJobIntervalMs);
+}
+const wsServer = new OrderWatcherWebSocketServer(provider, networkId, contractAddressesIfExists, orderWatcherConfig);
+wsServer.start();