1 files changed, 45 insertions, 0 deletions
diff --git a/packages/kovan-faucets/src/ts/zrx_request_queue.ts b/packages/kovan-faucets/src/ts/zrx_request_queue.ts
new file mode 100644
index 000000000..bbc06f1de
--- /dev/null
+++ b/packages/kovan-faucets/src/ts/zrx_request_queue.ts
@@ -0,0 +1,45 @@
+import { ZeroEx } from '0x.js';
+import { BigNumber } from '@0xproject/utils';
+import * as _ from 'lodash';
+
+import { configs } from './configs';
+import { errorReporter } from './error_reporter';
+import { RequestQueue } from './request_queue';
+import { utils } from './utils';
+
+// 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 DISPENSE_AMOUNT_ZRX = new BigNumber(0.1);
+const QUEUE_INTERVAL_MS = 5000;
+
+export class ZRXRequestQueue extends RequestQueue {
+    private _zeroEx: ZeroEx;
+    constructor(web3: Web3) {
+        super(web3);
+        this.queueIntervalMs = QUEUE_INTERVAL_MS;
+        const zeroExConfig = {
+            networkId: configs.KOVAN_NETWORK_ID,
+        };
+        this._zeroEx = new ZeroEx(web3.currentProvider, zeroExConfig);
+    }
+    protected async processNextRequestFireAndForgetAsync(recipientAddress: string) {
+        utils.consoleLog(`Processing ZRX ${recipientAddress}`);
+        const baseUnitAmount = ZeroEx.toBaseUnitAmount(DISPENSE_AMOUNT_ZRX, 18);
+        try {
+            await this._zeroEx.token.transferAsync(
+                configs.ZRX_TOKEN_ADDRESS,
+                configs.DISPENSER_ADDRESS,
+                recipientAddress,
+                baseUnitAmount,
+            );
+            utils.consoleLog(`Sent ${DISPENSE_AMOUNT_ZRX} ZRX to ${recipientAddress}`);
+        } catch (err) {
+            utils.consoleLog(`Unexpected err: ${err} - ${JSON.stringify(err)}`);
+            await errorReporter.reportAsync(err);
+        }
+    }
+}