Implement testnet faucets for any testnet available via infura

1 files changed, 37 insertions, 41 deletions

diff --git a/packages/testnet-faucets/src/ts/handler.ts b/packages/testnet-faucets/src/ts/handler.ts
index 4bf776264..8c859be2e 100644
--- a/packages/testnet-faucets/src/ts/handler.ts
+++ b/packages/testnet-faucets/src/ts/handler.ts
@@ -1,3 +1,4 @@
+import { addressUtils } from '@0xproject/utils';
 import * as express from 'express';
 import * as _ from 'lodash';
 import ProviderEngine = require('web3-provider-engine');
@@ -5,9 +6,10 @@ import HookedWalletSubprovider = require('web3-provider-engine/subproviders/hook
 import NonceSubprovider = require('web3-provider-engine/subproviders/nonce-tracker');
 import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
-import { configs } from './configs';
 import { EtherRequestQueue } from './ether_request_queue';
 import { idManagement } from './id_management';
+import { RequestQueue } from './request_queue';
+import { rpcUrls } from './rpc_urls';
 import { utils } from './utils';
 import { ZRXRequestQueue } from './zrx_request_queue';
 
@@ -17,62 +19,55 @@ import { ZRXRequestQueue } from './zrx_request_queue';
 // tslint:disable-next-line:ordered-imports
 import * as Web3 from 'web3';
 
+interface RequestQueueByNetworkId {
+    [networkId: string]: RequestQueue;
+}
+
+const DEFAULT_NETWORK_ID = 42; // kovan
+
 export class Handler {
-    private _etherRequestQueue: EtherRequestQueue;
-    private _zrxRequestQueue: ZRXRequestQueue;
-    private _web3: Web3;
+    private _etherRequestQueueByNetworkId: RequestQueueByNetworkId = {};
+    private _zrxRequestQueueByNetworkId: RequestQueueByNetworkId = {};
     constructor() {
-        // Setup provider engine to talk with RPC node
-        const providerObj = this._createProviderEngine(configs.RPC_URL);
-        this._web3 = new Web3(providerObj);
-
-        this._etherRequestQueue = new EtherRequestQueue(this._web3);
-        this._zrxRequestQueue = new ZRXRequestQueue(this._web3);
+        _.forIn(rpcUrls, (rpcUrl: string, networkId: string) => {
+            const providerObj = this._createProviderEngine(rpcUrl);
+            const web3 = new Web3(providerObj);
+            this._etherRequestQueueByNetworkId[networkId] = new EtherRequestQueue(web3);
+            this._zrxRequestQueueByNetworkId[networkId] = new ZRXRequestQueue(web3, +networkId);
+        });
     }
     public dispenseEther(req: express.Request, res: express.Response) {
-        const recipientAddress = req.params.recipient;
-        if (_.isUndefined(recipientAddress) || !this._isValidEthereumAddress(recipientAddress)) {
-            res.status(400).send('INVALID_REQUEST');
-            return;
-        }
-        const lowerCaseRecipientAddress = recipientAddress.toLowerCase();
-        const didAddToQueue = this._etherRequestQueue.add(lowerCaseRecipientAddress);
-        if (!didAddToQueue) {
-            res.status(503).send('QUEUE_IS_FULL');
-            return;
-        }
-        utils.consoleLog(`Added ${lowerCaseRecipientAddress} to the ETH queue`);
-        res.status(200).end();
+        this._dispense(req, res, this._etherRequestQueueByNetworkId, 'ETH');
     }
     public dispenseZRX(req: express.Request, res: express.Response) {
+        this._dispense(req, res, this._zrxRequestQueueByNetworkId, 'ZRX');
+    }
+    private _dispense(
+        req: express.Request,
+        res: express.Response,
+        requestQueueByNetworkId: RequestQueueByNetworkId,
+        assetSymbol: string,
+    ) {
         const recipientAddress = req.params.recipient;
         if (_.isUndefined(recipientAddress) || !this._isValidEthereumAddress(recipientAddress)) {
-            res.status(400).send('INVALID_REQUEST');
+            res.status(400).send('INVALID_RECIPIENT_ADDRESS');
+            return;
+        }
+        const networkId = _.get(req.query, 'networkId', DEFAULT_NETWORK_ID);
+        const requestQueue = _.get(requestQueueByNetworkId, networkId);
+        if (_.isUndefined(requestQueue)) {
+            res.status(400).send('INVALID_NETWORK_ID');
             return;
         }
         const lowerCaseRecipientAddress = recipientAddress.toLowerCase();
-        const didAddToQueue = this._zrxRequestQueue.add(lowerCaseRecipientAddress);
+        const didAddToQueue = requestQueue.add(lowerCaseRecipientAddress);
         if (!didAddToQueue) {
             res.status(503).send('QUEUE_IS_FULL');
             return;
         }
-        utils.consoleLog(`Added ${lowerCaseRecipientAddress} to the ZRX queue`);
+        utils.consoleLog(`Added ${lowerCaseRecipientAddress} to queue: ${assetSymbol} networkId: ${networkId}`);
         res.status(200).end();
     }
-    public getQueueInfo(req: express.Request, res: express.Response) {
-        res.setHeader('Content-Type', 'application/json');
-        const payload = JSON.stringify({
-            ether: {
-                full: this._etherRequestQueue.isFull(),
-                size: this._etherRequestQueue.size(),
-            },
-            zrx: {
-                full: this._zrxRequestQueue.isFull(),
-                size: this._zrxRequestQueue.size(),
-            },
-        });
-        res.status(200).send(payload);
-    }
     // tslint:disable-next-line:prefer-function-over-method
     private _createProviderEngine(rpcUrl: string) {
         const engine = new ProviderEngine();
@@ -86,8 +81,9 @@ export class Handler {
         engine.start();
         return engine;
     }
+    // tslint:disable-next-line:prefer-function-over-method
     private _isValidEthereumAddress(address: string): boolean {
         const lowercaseAddress = address.toLowerCase();
-        return this._web3.isAddress(lowercaseAddress);
+        return addressUtils.isAddress(lowercaseAddress);
     }
 }