Merge branch 'development' into feature/portal-ledger-support

* development:
  Publish
  Add PR number
  Add config file specifically in prettier command and fix files
  Fix prettier
  Fix prettier
  Add shouldAddPersonalMessagePrefix param to signOrderHashAsync instead of trying to infer whether to add it or not from the nodeVersion
  Publish
  Move @0xproject/types to dependencies
  Updated web3-typescript-typings changelog
  Fixed getTransactionReceipt not returning null
  Run prettier
  Update changelog
  Add Rinkeby addresses to artifacts
  Fix bad merge on package.json
  Respond to GH comments and add /info endpoint
  Change package name to @0xproject/testnet-faucets
  Implement testnet faucets for any testnet available via infura
  Rename to testnet-faucets
  Add to the Pull Request Template
  Create an ISSUE TEMPLATE

1 files changed, 56 insertions, 0 deletions

diff --git a/packages/testnet-faucets/src/ts/request_queue.ts b/packages/testnet-faucets/src/ts/request_queue.ts
new file mode 100644
index 000000000..20f2833a1
--- /dev/null
+++ b/packages/testnet-faucets/src/ts/request_queue.ts
@@ -0,0 +1,56 @@
+import * as _ from 'lodash';
+import * as timers from 'timers';
+
+// HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang
+// because they are using the wrong XHR package.
+// Filed issue: https://github.com/ethereum/web3.js/issues/844
+// tslint:disable-next-line:ordered-imports
+import * as Web3 from 'web3';
+
+const MAX_QUEUE_SIZE = 500;
+const DEFAULT_QUEUE_INTERVAL_MS = 1000;
+
+export class RequestQueue {
+    protected queueIntervalMs: number;
+    protected queue: string[];
+    protected queueIntervalId: NodeJS.Timer;
+    protected web3: Web3;
+    constructor(web3: any) {
+        this.queueIntervalMs = DEFAULT_QUEUE_INTERVAL_MS;
+        this.queue = [];
+
+        this.web3 = web3;
+
+        this.start();
+    }
+    public add(recipientAddress: string): boolean {
+        if (this.isFull()) {
+            return false;
+        }
+        this.queue.push(recipientAddress);
+        return true;
+    }
+    public size(): number {
+        return this.queue.length;
+    }
+    public isFull(): boolean {
+        return this.size() >= MAX_QUEUE_SIZE;
+    }
+    protected start() {
+        this.queueIntervalId = timers.setInterval(() => {
+            const recipientAddress = this.queue.shift();
+            if (_.isUndefined(recipientAddress)) {
+                return;
+            }
+            // tslint:disable-next-line:no-floating-promises
+            this.processNextRequestFireAndForgetAsync(recipientAddress);
+        }, this.queueIntervalMs);
+    }
+    protected stop() {
+        clearInterval(this.queueIntervalId);
+    }
+    // tslint:disable-next-line:prefer-function-over-method
+    protected async processNextRequestFireAndForgetAsync(recipientAddress: string) {
+        throw new Error('Expected processNextRequestFireAndForgetAsync to be implemented by a subclass');
+    }
+}