diff --git a/README.md b/README.md
index bfa458b..f79f17f 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ npm i @orionprotocol/sdk
 import { OrionUnit, Orion } from "@orionprotocol/sdk";
 import { Wallet } from "ethers";
 
-const orion = new Orion("production");
+const orion = new Orion();
 const orionUnit = orion.getUnit("bsc"); // eth, bsc, ftm, polygon, okc available
 const wallet = new Wallet("0x...", orionUnit.provider);
 // OrionUnit is chain-in-environment abstraction
@@ -74,7 +74,7 @@ const startApp = async (provider: BaseProvider) => {
   const web3Provider = new providers.Web3Provider(provider);
   await web3Provider.ready;
   const signer = web3Provider.getSigner(); // ready to go
-  const orion = new Orion("production");
+  const orion = new Orion();
   const orionUnit = orion.getUnit("eth"); // ready to go
 };
 
diff --git a/docs/INTEGRATION.md b/docs/INTEGRATION.md
index ee36e0b..d3c052e 100644
--- a/docs/INTEGRATION.md
+++ b/docs/INTEGRATION.md
@@ -7,8 +7,10 @@ Let's consider integration of Orion Protocol with your UI.
 Orion Protocol's SDK operate with OrionUnit — chain-in-environment abstraction. "Ethereum-in-production", "bsc-in-production", "fantom-in-testing", etc.
 
 ```ts
-import { OrionUnit } from "@orionprotocol/sdk";
-const orionUnit = new OrionUnit("bsc", "production"); // eth, bsc, ftm available
+import { Orion } from "@orionprotocol/sdk";
+const orion = new Orion();
+const bscOrionUnit = orion.getUnit("bsc"); // eth, bsc, ftm, polygon, okc available
+const ethOrionUnit = orion.getUnit("eth");
 ```
 
 ## 2. Signer accessing
diff --git a/package.json b/package.json
index 7621622..48f2154 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.17.0-rc.6",
+  "version": "0.17.0-rc.8",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
diff --git a/src/Orion/index.ts b/src/Orion/index.ts
index 7ccf202..d89253d 100644
--- a/src/Orion/index.ts
+++ b/src/Orion/index.ts
@@ -20,12 +20,15 @@ type EnvConfig = {
 // type KnownEnv = 'testing' | 'staging' | 'production';
 
 export default class Orion {
+  public readonly env?: string;
+
   public readonly units: Partial<Record<SupportedChainId, OrionUnit>>;
 
   public readonly orionAnalytics: OrionAnalytics;
 
   public readonly referralSystem: ReferralSystem;
 
+  constructor();
   constructor(
     env: string,
     overrides?: DeepPartial<EnvConfig>
@@ -40,13 +43,14 @@ export default class Orion {
   // TODO: bridge
 
   constructor(
-    envOrConfig: string | EnvConfig,
+    envOrConfig: string | EnvConfig = 'production',
     overrides?: DeepPartial<EnvConfig>
   ) {
     let config: EnvConfig;
     if (typeof envOrConfig === 'string') {
       const envConfig = envs[envOrConfig];
       if (!envConfig) throw new Error(`Invalid environment: ${envOrConfig}. Available environments: ${Object.keys(envs).join(', ')}`);
+      this.env = envOrConfig;
       config = {
         analyticsAPI: envConfig.analyticsAPI,
         referralAPI: envConfig.referralAPI,
diff --git a/src/__tests__/basic.test.ts b/src/__tests__/basic.test.ts
index 5418f7c..54abae1 100644
--- a/src/__tests__/basic.test.ts
+++ b/src/__tests__/basic.test.ts
@@ -95,7 +95,8 @@ describe('Orion', () => {
   });
 
   test('Init Orion production', () => {
-    const orion = new Orion('production');
+    const orion = new Orion();
+    expect(orion.env).toBe('production');
     expect(orion.orionAnalytics).toBeInstanceOf(OrionAnalytics);
     expect(orion.referralSystem).toBeInstanceOf(ReferralSystem);
     expect(orion.unitsArray.length).toBe(5); // eth, bsc, polygon, fantom, okc