diff --git a/inc/class-wooviet-1pay-bank.php b/inc/class-wooviet-1pay-bank.php
index 0c661c0..ebbf649 100644
--- a/inc/class-wooviet-1pay-bank.php
+++ b/inc/class-wooviet-1pay-bank.php
@@ -14,6 +14,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 
 
 class WooViet_1Pay_Bank extends WC_Payment_Gateway {
+
 	/**
 	 * Constructor for the gateway.
 	 */
@@ -24,10 +25,9 @@ class WooViet_1Pay_Bank extends WC_Payment_Gateway {
 		$this->method_title       = __( '1Pay Bank (by Woo Viet)', 'woo-viet' );
 
 		// @todo - check the method description
-		$this->method_description =  __( '1Pay Bank supports all banks of Vietnam.', 'woo-viet' );
+		$this->method_description =  __( '1Pay Bank supports all local banks in Vietnam.', 'woo-viet' );
 		$this->supports           = array(
 			'products',
-			'refunds'
 		);
 
 		// Load the settings.
@@ -37,6 +37,8 @@ class WooViet_1Pay_Bank extends WC_Payment_Gateway {
 		// Define user set variables.
 		$this->title          = $this->get_option( 'title' );
 		$this->description    = $this->get_option( 'description' );
+		$this->access_key = $this->get_option( 'access_key' );
+		$this->secret = $this->get_option( 'secret' );
 
 		add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
 
@@ -59,19 +61,44 @@ class WooViet_1Pay_Bank extends WC_Payment_Gateway {
 
 		return array(
 			'result'   => 'success',
-			'redirect' => $this->get_request_url( $order )
+			'redirect' => $this->get_pay_url( $order )
 		);
 	}
 
 	/**
-	 * Get the 1Pay request URL for an order.
+	 * Get the 1Pay pay_url for an order.
 	 * @param  WC_Order $order
 	 * @return string
 	 */
-	public function get_request_url ( $order ) {
+	public function get_pay_url ( $order ) {
 
+
+		$access_key = $this->access_key;
+		$secret = $this->secret;               // require your secret key from 1pay
+		$return_url = $this->get_1pay_return_url();
+
+		$command = 'request_transaction';
+		$amount = $order->get_total();   // >10000
+		$order_id = $order->id;
+		$order_info = sprintf( 'The payment for the order number %1$s on the site: %2$s', $order->id, get_home_url());
+
+		$data = "access_key=".$access_key."&amount=".$amount."&command=".$command."&order_id=".$order_id."&order_info=".$order_info."&return_url=".$return_url;
+		$signature = hash_hmac("sha256", $data, $secret);
+		$data.= "&signature=".$signature;
+
+		// @todo: make the POST request to get pay_url
+		/*
+		$json_bankCharging = execPostRequest('http://api.1pay.vn/bank-charging/service', $data);
+		//Ex: {"pay_url":"http://api.1pay.vn/bank-charging/sml/nd/order?token=LuNIFOeClp9d8SI7XWNG7O%2BvM8GsLAO%2BAHWJVsaF0%3D", "status":"init", "trans_ref":"16aa72d82f1940144b533e788a6bcb6"}
+		$decode_bankCharging=json_decode($json_bankCharging,true);  // decode json
+		$pay_url = $decode_bankCharging["pay_url"];
+		header("Location: $pay_url");
+		*/
 	}
 
+	public function get_1pay_return_url(){
+		return WC()->api_request_url( __CLASS__ );
+	}
 
 }