blob: 460008e93a2309717c5b19943ddb117eb44c3809 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
import * as _ from 'lodash';
import * as express from 'express';
import {EtherRequestQueue} from './ether_request_queue';
import {ZRXRequestQueue} from './zrx_request_queue';
import {configs} from './configs';
import {utils} from './utils';
import ProviderEngine = require('web3-provider-engine');
import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
import NonceSubprovider = require('web3-provider-engine/subproviders/nonce-tracker');
import HookedWalletSubprovider = require('web3-provider-engine/subproviders/hooked-wallet');
import {idManagement} from './id_management';
import * as Web3 from 'web3';
// HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang
// because they are using the wrong XHR package.
// Issue: https://github.com/trufflesuite/truffle-contract/issues/14
delete (global as any).XMLHttpRequest;
export class Handler {
private etherRequestQueue: EtherRequestQueue;
private zrxRequestQueue: ZRXRequestQueue;
private web3: Web3;
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);
}
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();
}
public dispenseZRX(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.zrxRequestQueue.add(lowerCaseRecipientAddress);
if (!didAddToQueue) {
res.status(503).send('QUEUE_IS_FULL');
return;
}
utils.consoleLog(`Added ${lowerCaseRecipientAddress} to the ZRX queue`);
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);
}
private createProviderEngine(rpcUrl: string) {
const engine = new ProviderEngine();
engine.addProvider(new NonceSubprovider());
engine.addProvider(new HookedWalletSubprovider(idManagement));
engine.addProvider(new RpcSubprovider({
rpcUrl,
}));
engine.start();
return engine;
}
private isValidEthereumAddress(address: string): boolean {
const lowercaseAddress = address.toLowerCase();
return this.web3.isAddress(lowercaseAddress);
}
}
|