Add CashU payment gateway to Wordpress Woocommerce - php

Question

I'm having trouble adding CashU payment in WooCommerce (version 2.3.6) Wordpress (version 4.1.1)
I've already googled my query, but no luck. I found this guide but I don't know where to put it or where should I start.
I tried hardcoding the payment option but the backend does not allow me to continue because the option does not exist. I'm stuck in add_action and do_action functions, I think if I can find that function I can add an exception for my CashU payment.
My expertise is on cakephp and other php framework. I don't have any experience in using Wordpress or any other platform similar to it, but my boss insisted I should do this work and add the cashu payment.. I don't have other choices but to follow.
Any idea would be much appreciated or any other payment that might be similar to this. Thanks in advance

Answer 1

I just finished making a Woocommerce Payment gateway too.. it took me about 15 hours from scratch.
I started with this guide.
http://www.sitepoint.com/building-a-woocommerce-payment-extension/
and this guide:
http://www.mrova.com/lets-create-a-payment-gateway-plugin-payu-for-woocommerce/
I actually learnt the most from looking through the code from these two professional ones:
https://github.com/Paymium/WooCommerce/blob/master/checkout.php
https://github.com/tubiz/voguepay-woocommerce-payment-gateway/blob/master/voguepay-woocommerce-payment-gateway.php
my entire code for the whole thing ended up being just one file. and just press "activate" in the plugins window of wordpress for your gateway.
/wp-content/plugins/woocommerce-payment-gateway-kiwipay/woocommerce-payment-gateway-kiwipay.php

Answer 2

Try this sdk for cashu https://github.com/AlaaKanaan/payment-getaway-soap-sdk
The SDK include this features:
Standard
Premier
Basic security token
Enhanced security token
Standard StandingOrder
Refund
Merchant Services
install:
composer require alaakanaan/cashu-soap-php-sdk:dev-master
use Cashu\CashuClient;
$client = new CashuClient();
$payment = new \Cashu\lib\model\Payment();
$payment->setAmount(200);
$payment->setCurrency('USD');
$payment->setDisplayText('test payment');
$payment->setLanguage('en');
$payment->setSessionId('11');
$payment->setTxt1('test text 1');
$html=$client->getPremierMethod($payment->getTransactionCode());
return $html;