From 63c1371709d7006c29ed06eb80e5819e16581e9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Loun=C3=A8s=20Ksouri?= <dev@louneskmt.com>
Date: Mon, 5 Oct 2020 19:32:50 +0200
Subject: [PATCH] Add endpoint to fetch Bitcoin price via Tor (#53)

---
 README.md             |  2 ++
 app.js                |  2 ++
 package.json          |  1 +
 routes/v1/external.js | 28 ++++++++++++++++++++++++++++
 utils/const.js        |  2 ++
 yarn.lock             | 19 ++++++++++++++++++-
 6 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 routes/v1/external.js

diff --git a/README.md b/README.md
index f045aeb..e3e4053 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,8 @@ Set the following environment variables directly or by placing them in `.env` fi
 | `UPDATE_SIGNAL_FILE` | Path to write the update signal file | `/signals/update` |
 | `UPDATE_LOCK_FILE` | Path to the update lock file | `/statuses/update-in-progress` |
 | `BACKUP_STATUS_FILE` | Path to backup status file | `/statuses/backup-status.json` |
+| `TOR_PROXY_IP` | IP or domain where Tor proxy is listening | `192.168.0.1` |
+| `TOR_PROXY_PORT` | Port where Tor proxy is listening | `9050` |
 
 ### Step 3. Run manager
 ```sh
diff --git a/app.js b/app.js
index a4326c5..1c29617 100644
--- a/app.js
+++ b/app.js
@@ -21,6 +21,7 @@ const logger = require('utils/logger.js');
 const ping = require('routes/ping.js');
 const account = require('routes/v1/account.js');
 const system = require('routes/v1/system.js');
+const external = require('routes/v1/external.js');
 
 const app = express();
 
@@ -40,6 +41,7 @@ app.use(morgan(logger.morganConfiguration));
 app.use('/ping', ping);
 app.use('/v1/account', account);
 app.use('/v1/system', system);
+app.use('/v1/external', external);
 
 app.use(errorHandleMiddleware);
 app.use((req, res) => {
diff --git a/package.json b/package.json
index 13dd1bb..64016c1 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "passport-jwt": "^4.0.0",
     "request-promise": "^4.2.2",
     "semver": "^7.3.2",
+    "socks-proxy-agent": "^5.0.0",
     "uuid": "^8.0.0",
     "validator": "^13.0.0",
     "winston": "^3.0.0-rc5",
diff --git a/routes/v1/external.js b/routes/v1/external.js
new file mode 100644
index 0000000..0c2c4b3
--- /dev/null
+++ b/routes/v1/external.js
@@ -0,0 +1,28 @@
+const express = require('express');
+const router = express.Router();
+
+const auth = require('middlewares/auth.js');
+
+const constants = require('utils/const.js');
+const safeHandler = require('utils/safeHandler');
+
+const {SocksProxyAgent} = require('socks-proxy-agent');
+const axios = require('axios');
+
+const agent = new SocksProxyAgent(`socks5h://${constants.TOR_PROXY_IP}:${constants.TOR_PROXY_PORT}`);
+
+router.get('/price', auth.jwt, safeHandler(async(req, res) => {
+  const response = await axios({
+    url: 'https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD',
+    httpsAgent: agent,
+    method: 'GET'
+  });
+
+  if (response.data) {
+    return res.status(constants.STATUS_CODES.OK).json(response.data);
+  }
+
+  return res.status(constants.STATUS_CODES.BAD_GATEWAY).json();
+}));
+
+module.exports = router;
diff --git a/utils/const.js b/utils/const.js
index db7ab4a..e25b514 100644
--- a/utils/const.js
+++ b/utils/const.js
@@ -29,6 +29,8 @@ module.exports = {
   UPDATE_SIGNAL_FILE: process.env.UPDATE_SIGNAL_FILE || '/signals/update',
   UPDATE_LOCK_FILE: process.env.UPDATE_LOCK_FILE || '/statuses/update-in-progress',
   BACKUP_STATUS_FILE: process.env.BACKUP_STATUS_FILE || '/statuses/backup-status.json',
+  TOR_PROXY_IP: process.env.TOR_PROXY_IP || '192.168.0.1',
+  TOR_PROXY_PORT: process.env.TOR_PROXY_PORT || 9050,
   STATUS_CODES: {
     ACCEPTED: 202,
     BAD_GATEWAY: 502,
diff --git a/yarn.lock b/yarn.lock
index 9d2438a..96262b0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2681,7 +2681,7 @@ ip-regex@^2.0.0, ip-regex@^2.1.0:
   resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-2.1.0.tgz#fa78bf5d2e6913c911ce9f819ee5146bb6d844e9"
   integrity sha1-+ni/XS5pE8kRzp+BnuUUa7bYROk=
 
-ip@1.1.5:
+ip@1.1.5, ip@^1.1.5:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/ip/-/ip-1.1.5.tgz#bdded70114290828c0a039e72ef25f5aaec4354a"
   integrity sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo=
@@ -5295,6 +5295,23 @@ socks-proxy-agent@^4.0.0:
     agent-base "~4.2.1"
     socks "~2.3.2"
 
+socks-proxy-agent@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/socks-proxy-agent/-/socks-proxy-agent-5.0.0.tgz#7c0f364e7b1cf4a7a437e71253bed72e9004be60"
+  integrity sha512-lEpa1zsWCChxiynk+lCycKuC502RxDWLKJZoIhnxrWNjLSDGYRFflHA1/228VkRcnv9TIb8w98derGbpKxJRgA==
+  dependencies:
+    agent-base "6"
+    debug "4"
+    socks "^2.3.3"
+
+socks@^2.3.3:
+  version "2.4.4"
+  resolved "https://registry.yarnpkg.com/socks/-/socks-2.4.4.tgz#f1a3382e7814ae28c97bb82a38bc1ac24b21cca2"
+  integrity sha512-7LmHN4IHj1Vpd/k8D872VGCHJ6yIVyeFkfIBExRmGPYQ/kdUkpdg9eKh9oOzYYYKQhuxavayJHTnmBG+EzluUA==
+  dependencies:
+    ip "^1.1.5"
+    smart-buffer "^4.1.0"
+
 socks@~2.3.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/socks/-/socks-2.3.3.tgz#01129f0a5d534d2b897712ed8aceab7ee65d78e3"