diff --git a/app.js b/app.js
new file mode 100644
index 0000000..551edd8
--- /dev/null
+++ b/app.js
@@ -0,0 +1,88 @@
+const NEXCHANGE_ROOT = process.env.NEXCHANGE_ROOT;
+const ICO_ROOT = process.env.ICO_ROOT;
+const OLD_SITE_URL = process.env.OLD_SITE_URL;
+const DEVENV = process.env.DEVENV;
+
+const express = require('express');
+const path = require('path');
+const helmet = require('helmet')
+const referrerSwitch = require('./logic/Switch.js')
+
+const app = express();
+
+//Helmet helps you secure your Express apps by setting various HTTP headers.
+app.use(helmet())
+
+//Exclude index.html from static serving
+app.use('/ico', express.static(path.resolve(ICO_ROOT)));
+app.use(express.static(path.resolve(NEXCHANGE_ROOT),{index: false}));
+
+function getCur(qParam) {
+    return qParam.toUpperCase().substr(-3);
+}
+
+app.get('/ico', (req, res) => {
+  res.sendFile(path.resolve(ICO_ROOT, 'index.html'));
+});
+
+// Handling lowercase order Ids
+var orderUppercase = (req, res, next) => {
+
+  if (req.params.orderId) {
+    const orderIdUP =  req.params.orderId.toUpperCase()
+    if (req.params.orderId != orderIdUP) {
+      res.redirect('/order/' + orderIdUP)
+    }
+    else {
+      next()
+    }
+  }
+};
+
+// General handler for the rest of the URLs
+var generalHandler = (req, res) => {
+
+  if (req.header('Referer')) {
+
+    let rHeader = req.header('Referer');
+    //If traffic comes from partner
+    if (rHeader.indexOf('n.exchange') == -1) {
+      try {
+
+        let rSwitch = new referrerSwitch(rHeader);
+        let referrer = rSwitch.getMatchingReferrer();
+
+        let params = {'lang': referrer.getLang(req.query),
+                    'pair': referrer.getPair(req.query, rHeader)};
+
+        params = Object.keys(params).filter(key => params[key] !== '' ).map(key => key + '=' + params[key]).join('&');
+
+        if (referrer.isCard(rHeader)) {
+          res.redirect(OLD_SITE_URL + '?' + params);
+          return;
+        }
+        else if (referrer.redirectRequired) {
+          res.redirect(req.path + '?' + params);
+          return;
+        }
+      }
+      catch(e) {
+        if (DEVENV) {
+          console.log(e);
+        }
+      }
+    }
+  }
+
+  res.sendFile(path.resolve(process.env.NEXCHANGE_ROOT, 'index.html'));
+};
+
+// Convert order ids to uppercase
+app.get('/order/:orderId', [orderUppercase, generalHandler]
+);
+
+// For all other cases
+app.get('*', generalHandler);
+
+module.exports = app;
+
diff --git a/index.js b/index.js
deleted file mode 100644
index 3b3cccb..0000000
--- a/index.js
+++ /dev/null
@@ -1,50 +0,0 @@
-const express = require('express');
-const path = require('path');
-const helmet = require('helmet')
-
-const app = express();
-const NEXCHANGE_ROOT = process.env.NEXCHANGE_ROOT
-const ICO_ROOT = process.env.ICO_ROOT
-
-//Helmet helps you secure your Express apps by setting various HTTP headers.
-app.use(helmet())
-app.use('/ico', express.static(path.resolve(ICO_ROOT)));
-app.use(express.static(path.resolve(NEXCHANGE_ROOT)));
-
-function getCur(qParam) {
-    return qParam.toUpperCase().substr(-3);
-}
-
-app.get('/ico', (req, res) => {
-  res.sendFile(path.resolve(ICO_ROOT, 'index.html'));
-});
-
-app.get('*', (req, res) => {
-  let redirectRequired = false;
-  let params = {};
-  if (req.query.cur_from && req.query.cur_to) {
-    redirectRequired = true;
-    req.query.pair = getCur(req.query.cur_to) + getCur(req.query.cur_from);
-    delete req.query['cur_to'];
-    delete req.query['cur_from'];
-  }
-
-  if (req.query.lang && req.query.lang !== req.query.lang.toLowerCase()) {
-    redirectRequired = true;
-    req.query.lang =  req.query.lang.toLowerCase()
-  }
-
-
-  if (redirectRequired) {
-      params = req.query;
-      params = Object.keys(params).map(key => key + '=' + params[key]).join('&');
-    res.redirect(req.path + '?' + params)
-  }
-
-  res.sendFile(path.resolve(process.env.NEXCHANGE_ROOT, 'index.html'));
-
-});
-
-app.listen(3000, () => console.log('Nexchange Frontend Proxy is listening on port 3000!'));
-
-
diff --git a/logic/Allchange.js b/logic/Allchange.js
new file mode 100644
index 0000000..cb69316
--- /dev/null
+++ b/logic/Allchange.js
@@ -0,0 +1,37 @@
+const Partner = require('./Partner.js')
+
+class Allchange extends Partner {
+
+  constructor() {
+    super('Allchange', 'allchange.org')
+  }
+
+  getPair (params, referer) {
+
+    let path = referer.split('/');
+    let direction = path[path.length-1];
+    if (direction.indexOf('direction') > -1) {
+      let dirArr = direction.split('=');
+      let pairArr =  dirArr[dirArr.length-1].split('_');
+      let pairA = this.matchCurrency(pairArr[0]);
+      let pairB = this.matchCurrency(pairArr[1]);
+      if (pairA && pairB) {
+        this.redirectRequired = true;
+        return pairB+pairA;
+      }
+    }
+
+    return '';
+  }
+
+  isCard (referrer) {
+    return (referrer.indexOf('CARD') > -1);
+  }
+
+  getReferrerCode (params) {
+    return params.ref;
+  }
+
+}
+
+module.exports = Allchange;
\ No newline at end of file
diff --git a/logic/Bestchange.js b/logic/Bestchange.js
new file mode 100644
index 0000000..87b1057
--- /dev/null
+++ b/logic/Bestchange.js
@@ -0,0 +1,42 @@
+const Partner = require('./Partner.js')
+
+class Bestchange extends Partner {
+
+  constructor() {
+    super('Bestchange', 'bestchange.ru')
+  }
+
+  getPair (params, referer) {
+    let pair
+    if (params.cur_to && params.cur_from) {
+      pair = this.getCur(params.cur_to) + this.getCur(params.cur_from);
+      this.redirectRequired = true;
+    }
+    else {
+      pair = '';
+    }
+    return pair;
+  }
+
+  getLang (params) {
+    let lang
+    if (params.lang && params.lang !== params.lang.toLowerCase()) {
+      lang = params.lang.toLowerCase()
+      this.redirectRequired = true;
+    }
+    else {
+      lang = '';
+    }
+    return lang;
+  }
+
+  isCard (referrer) {
+    return (referrer.indexOf('visa-mastercard') > -1);
+  }
+
+  getReferrerCode (params) {
+    return params.ref;
+  }
+}
+
+module.exports = Bestchange;
\ No newline at end of file
diff --git a/logic/Bestcurs.js b/logic/Bestcurs.js
new file mode 100644
index 0000000..09cbb9b
--- /dev/null
+++ b/logic/Bestcurs.js
@@ -0,0 +1,33 @@
+const Partner = require('./Partner.js')
+
+class Bestcurs extends Partner {
+
+  constructor() {
+    super('Bestcurs', 'bestcurs.org')
+  }
+
+  getPair (params, referer) {
+
+    let path = referer.split('/');
+    let pairArr = path[path.length-2].split('-');
+    let pairA = this.matchCurrency(pairArr[0]);
+    let pairB = this.matchCurrency(pairArr[1]);
+    if (pairA !== false && pairB !== false) {
+      this.redirectRequired = true;
+      return pairB+pairA;
+    }
+
+    return '';
+  }
+
+  getReferrerCode (params) {
+    return params.r;
+  }
+
+  isCard (referrer) {
+    return (referrer.indexOf('Card') > -1);
+  }
+
+}
+
+module.exports = Bestcurs;
\ No newline at end of file
diff --git a/logic/Emon.js b/logic/Emon.js
new file mode 100644
index 0000000..1861f60
--- /dev/null
+++ b/logic/Emon.js
@@ -0,0 +1,38 @@
+const Partner = require('./Partner.js')
+
+class Emon extends Partner {
+
+  constructor() {
+    super('E-mon', 'e-mon.ru')
+  }
+
+  getCur(qParam) {
+    return qParam.toUpperCase().substr(-3);
+  }
+
+  getPair (params, referer) {
+
+    let path = referer.split('/');
+
+    let pairA = this.matchCurrency(path[path.length-2]);
+    let pairB = this.matchCurrency(path[path.length-1]);
+
+    if (pairA !== false && pairB !== false) {
+      this.redirectRequired = true;
+      return pairB+pairA;
+    }
+
+    return '';
+  }
+
+  getReferrerCode (params) {
+    return params.rid;
+  }
+
+  isCard (referrer) {
+    return (referrer.indexOf('CARD') > -1);
+  }
+
+}
+
+module.exports = Emon;
\ No newline at end of file
diff --git a/logic/Exchangesumo.js b/logic/Exchangesumo.js
new file mode 100644
index 0000000..7c40b9c
--- /dev/null
+++ b/logic/Exchangesumo.js
@@ -0,0 +1,32 @@
+const Partner = require('./Partner.js')
+
+class Exchangesumo extends Partner {
+
+  constructor() {
+    super('Exchangesumo', 'exchangesumo.com')
+  }
+
+  getPair (params, referer) {
+
+    let path = referer.split('/');
+    let pairArr = path[path.length-2].split('-');
+    let pairA = this.matchCurrency(pairArr[0]);
+    let pairB = this.matchCurrency(pairArr[1]);
+    if (pairA !== false && pairB !== false) {
+      this.redirectRequired = true;
+      return pairB+pairA;
+    }
+    return '';
+  }
+
+  isCard (referrer) {
+    return (referrer.indexOf('Card') > -1);
+  }
+
+  getReferrerCode (params) {
+    return params.refId;
+  }
+
+}
+
+module.exports = Exchangesumo;
\ No newline at end of file
diff --git a/logic/Kursexpert.js b/logic/Kursexpert.js
new file mode 100644
index 0000000..4a5fa10
--- /dev/null
+++ b/logic/Kursexpert.js
@@ -0,0 +1,17 @@
+const Partner = require('./Partner.js')
+
+//Haven't found n.exchange reference on this site.
+class Kursexpert extends Partner {
+
+  constructor() {
+    super('Kurs Expert', 'kurs.expert')
+  }
+
+
+  getReferrerCode (params) {
+    return params.ref;
+  }
+
+}
+
+module.exports = Kursexpert;
\ No newline at end of file
diff --git a/logic/Okchanger.js b/logic/Okchanger.js
new file mode 100644
index 0000000..121b29f
--- /dev/null
+++ b/logic/Okchanger.js
@@ -0,0 +1,32 @@
+const Partner = require('./Partner.js')
+
+class Okchanger extends Partner {
+
+  constructor() {
+    super('Okchanger', 'okchanger.com')
+  }
+
+  getPair (params, referer) {
+
+    let path = referer.split('/');
+    let pairArr = path[path.length-1].split('to');
+    let pairA = this.matchCurrency(pairArr[0]);
+    let pairB = this.matchCurrency(pairArr[1]);
+    if (pairA !== false && pairB !== false) {
+      this.redirectRequired = true;
+      return pairB+pairA;
+    }
+
+    return '';
+    }
+
+  isCard (referrer) {
+    return (referrer.indexOf('VISAMASTERCARD') > -1);
+  }
+
+  getReferrerCode (params) {
+    return params.rid;
+  }
+}
+
+module.exports = Okchanger;
\ No newline at end of file
diff --git a/logic/Partner.js b/logic/Partner.js
new file mode 100644
index 0000000..8e2901e
--- /dev/null
+++ b/logic/Partner.js
@@ -0,0 +1,54 @@
+class Partner {
+
+  constructor(name, referrer) {
+    this.name = name;
+    this.referrer = referrer;
+    this.redirectRequired = false;
+    this.currencies = ['EUR','GBP','JPY','RUB','USD','BCH','BTC','DASH','DOGE','LTC','ZEC']
+  }
+
+  getCur(qParam) {
+    return qParam.toUpperCase().substr(-3);
+  }
+
+  matchCurrency(str) {
+    str = str.toUpperCase();
+    for (var i=0; i<this.currencies.length; i++) {
+      if (str.indexOf(this.currencies[i]) > -1) {
+        return this.currencies[i];
+      }
+    }
+
+    return false;
+  }
+
+  isReferrer (referrer) {
+    return (referrer.indexOf(this.referrer) != -1);
+  }
+
+  getPair (params, referer) {
+    return '';
+  }
+
+  getLang (params) {
+    return '';
+  }
+
+  getMethod (params) {
+    return '';
+  }
+
+  getName() {
+    return this.name;
+  }
+
+  isCard (params) {
+    return false;
+  }
+
+  getReferrerCode (params) {
+    return '';
+  }
+}
+
+module.exports = Partner;
\ No newline at end of file
diff --git a/logic/Switch.js b/logic/Switch.js
new file mode 100644
index 0000000..5c792d6
--- /dev/null
+++ b/logic/Switch.js
@@ -0,0 +1,27 @@
+const bestchange = require('./Bestchange.js')
+const okchanger = require('./Okchanger.js')
+const exchangesumo = require('./Exchangesumo.js')
+const allchange = require('./Allchange.js')
+const bestcurs = require('./Bestcurs.js')
+const emon = require('./Emon.js')
+const kursexpert = require('./Kursexpert.js')
+const partner = require('./Partner.js')
+
+class Switch {
+
+    constructor (referrer) {
+      this.sites = [new bestchange(), new okchanger(), new exchangesumo(), new allchange(), new bestcurs(), new emon(), new kursexpert()];
+      this.referrer = referrer;
+    }
+
+    getMatchingReferrer () {
+      for (var i=0; i<this.sites.length; i++) {
+        if (this.sites[i].isReferrer(this.referrer)) {
+          return this.sites[i];
+        }
+      }
+      return new partner('Unknown', this.referrer);
+    }
+}
+
+module.exports = Switch;
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 71c2e89..5e164a7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,598 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+      "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.8.3"
+      }
+    },
+    "@babel/core": {
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.8.4.tgz",
+      "integrity": "sha512-0LiLrB2PwrVI+a2/IEskBopDYSd8BCb3rOvH7D5tzoWd696TBEduBvuLVm4Nx6rltrLZqvI3MCalB2K2aVzQjA==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.4",
+        "@babel/helpers": "^7.8.4",
+        "@babel/parser": "^7.8.4",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.4",
+        "@babel/types": "^7.8.3",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
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+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
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+        "ms": {
+          "version": "2.1.2",
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+          "dev": true
+        },
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/generator": {
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.8.4.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.13",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
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+          "version": "0.5.7",
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+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.8.3.tgz",
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+      "dev": true
+    },
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+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
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+          }
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+    },
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+      "requires": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
+      }
+    },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
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+      "requires": {
+        "isexe": "^2.0.0"
+      }
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
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+    },
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+        "string-width": "^4.1.0",
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+      }
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+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
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+    },
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+    },
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+      "version": "3.0.0",
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+    },
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+    },
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+      "dev": true
+    },
+    "yargs": {
+      "version": "15.1.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.1.0.tgz",
+      "integrity": "sha512-T39FNN1b6hCW4SOIk1XyTOWxtXdcen0t+XYrysQmChzSipvhBO8Bj0nK1ozAasdk24dNWuMZvr4k24nz+8HHLg==",
+      "dev": true,
+      "requires": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^16.1.0"
+      }
+    },
+    "yargs-parser": {
+      "version": "16.1.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-16.1.0.tgz",
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+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 80efebd..1efc847 100644
--- a/package.json
+++ b/package.json
@@ -4,12 +4,25 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+      "test": "jest"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
     "express": "^4.16.3",
     "helmet": "^3.21.2"
+  },
+  "devDependencies": {
+    "jest": "^25.1.0",
+    "supertest": "^4.0.2"
+  },
+  "jest": {
+      "testEnvironment": "node",
+      "coveragePathIgnorePatterns": [
+        "/node_modules/"
+      ],
+    "setupFiles": [
+        "<rootDir>/tests/setEnvVars.js"
+      ]
   }
 }
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..95205e4
--- /dev/null
+++ b/server.js
@@ -0,0 +1,4 @@
+//server.js
+const app = require('./app')
+
+app.listen(3000, () => console.log('Nexchange Frontend Proxy is listening on port 3000!'));
diff --git a/tests/Allchange.test.js b/tests/Allchange.test.js
new file mode 100644
index 0000000..a6d20b1
--- /dev/null
+++ b/tests/Allchange.test.js
@@ -0,0 +1,27 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Pair test', () => {
+  it('Should process currency pair, redirect', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://allchange.org/?direction=BTC_USD')
+              .expect('Location', "/?pair=USDBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://allchange.org/?direction=CARDUSD_LTC')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/Bestchange.test.js b/tests/Bestchange.test.js
new file mode 100644
index 0000000..8a7e6c6
--- /dev/null
+++ b/tests/Bestchange.test.js
@@ -0,0 +1,40 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Lang test', () => {
+  it('Should let lang param through', () => {
+      return request(app)
+              .get("/")
+              .query({ lang: 'RU' })
+              .set('Referer', 'https://bestchange.ru')
+              .expect('Location', "/?lang=ru")
+              .expect(302);
+  })
+})
+
+describe('Pair test', () => {
+  it('Should process currency pair', () => {
+      return request(app)
+              .get("/")
+              .query({ cur_from: 'BTC', cur_to: 'USD' })
+              .set('Referer', 'https://bestchange.ru')
+              .expect('Location', "/?pair=USDBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .query({ cur_from: 'BTC', cur_to: 'USD' })
+              .set('Referer', 'https://www.bestchange.ru/visa-mastercard-usd-to-bitcoin.html')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/Bestcurs.test.js b/tests/Bestcurs.test.js
new file mode 100644
index 0000000..058c773
--- /dev/null
+++ b/tests/Bestcurs.test.js
@@ -0,0 +1,27 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Pair test', () => {
+  it('Should process currency pair, redirect', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://bestcurs.org/EXCHANGE/724/BTC-LTC/')
+              .expect('Location', "/?pair=LTCBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://bestcurs.org/EXCHANGE/724/CardUSD-LTC/')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/Emon.test.js b/tests/Emon.test.js
new file mode 100644
index 0000000..d4960bb
--- /dev/null
+++ b/tests/Emon.test.js
@@ -0,0 +1,27 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Pair test', () => {
+  it('Should process currency pair, redirect', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://e-mon.ru/exchange/BTC/LTC')
+              .expect('Location', "/?pair=LTCBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://e-mon.ru/exchange/CARDUSD/LTC')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/Exchangesumo.test.js b/tests/Exchangesumo.test.js
new file mode 100644
index 0000000..e9a46f1
--- /dev/null
+++ b/tests/Exchangesumo.test.js
@@ -0,0 +1,27 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Pair test', () => {
+  it('Should process currency pair, redirect', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://exchangesumo.com/obmen/BTC-LTC/')
+              .expect('Location', "/?pair=LTCBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://exchangesumo.com/obmen/CardUSD-LTC/')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/Okchanger.test.js b/tests/Okchanger.test.js
new file mode 100644
index 0000000..5e2f92c
--- /dev/null
+++ b/tests/Okchanger.test.js
@@ -0,0 +1,27 @@
+const request = require('supertest');
+const app = require('../app')
+
+describe('Pair test', () => {
+  it('Should process currency pair, redirect', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://www.okchanger.com/CRYPTOCURRENCIES-BTC-to-CRYPTOCURRENCIES-LTC')
+              .expect('Location', "/?pair=LTCBTC")
+              .expect(302);
+  })
+})
+
+describe('Card test', () => {
+  it('Should redirect to the old site in case of card payment.', () => {
+      return request(app)
+              .get("/")
+              .set('Referer', 'https://www.okchanger.com/VISAMASTERCARD-USD-to-CRYPTOCURRENCIES-LTC')
+              .expect(function(res) {
+                if (res.header.location.indexOf(process.env.OLD_SITE_URL) == -1) {
+                  throw new Error("Location is not OLD SITE URL");
+                }
+              })
+              .expect(302);
+  })
+})
+
diff --git a/tests/setEnvVars.js b/tests/setEnvVars.js
new file mode 100644
index 0000000..aecaf74
--- /dev/null
+++ b/tests/setEnvVars.js
@@ -0,0 +1 @@
+process.env.OLD_SITE_URL="test.old.site"
\ No newline at end of file