diff --git a/README.md b/README.md
index 02ab712..d5c31da 100644
--- a/README.md
+++ b/README.md
@@ -19,8 +19,6 @@ use Metahash\MetaHash;
 use Metahash\MetaHashCrypto;
 
 $metaHash = new MetaHash();
-$metaHash->setNetwork('main');
-
 $balance = $metaHash->fetchBalance('0x00fa2a5279f8f0fd2f0f9d3280ad70403f01f9d62f52373833');
 print_r($balance);
 ```
diff --git a/examples/index.php b/examples/index.php
index aea22f5..965dd53 100644
--- a/examples/index.php
+++ b/examples/index.php
@@ -7,7 +7,6 @@
 // !!! very bad
 if (isset($_GET['address'])) {
     $crypto = new MetaHash();
-    $crypto->setNetwork('main');
     $balance = \json_encode($crypto->fetchBalance($_GET['address']), JSON_PRETTY_PRINT);
 } else {
     $balance = false;
diff --git a/examples/wallets.php b/examples/wallets.php
index cf0b42c..f490625 100644
--- a/examples/wallets.php
+++ b/examples/wallets.php
@@ -5,7 +5,6 @@
 use Metahash\MetaHash;
 
 $crypto = new MetaHash();
-$crypto->setNetwork('main');
 
 $wallets = [
     '0x00fa2a5279f8f0fd2f0f9d3280ad70403f01f9d62f52373833' => 'MetaWat.ch',
diff --git a/src/MetaHash.php b/src/MetaHash.php
index d826fa2..6dec136 100644
--- a/src/MetaHash.php
+++ b/src/MetaHash.php
@@ -27,6 +27,10 @@ class MetaHash
     public const NODE_PROXY = 'PROXY';
     public const NODE_TORRENT = 'TORRENT';
 
+    public const NETWORK_MAIN = 'main';
+    public const NETWORK_TEST = 'test';
+    public const NETWORK_DEV = 'dev';
+
     /**
      * @var string
      */
@@ -63,7 +67,9 @@ public function __construct()
             'connect_timeout' => self::CONNECT_TIMEOUT,
             'debug'           => self::DEBUG,
         ];
-        $this->client = new GuzzleClient($guzzleOptions);
+        $this->setClient(new GuzzleClient($guzzleOptions));
+
+        $this->setNetwork(self::NETWORK_MAIN);
     }
 
     /**