informaticaD4P-2017-omnipay-plugin/src/Message/PurchaseRequest.php

<?php

namespace Omnipay\Inforbank\Message;

class PurchaseRequest extends AbstractRequest
{
    protected $endpoint = "http://localhost:8080/api/transactionRequest";

    protected function generateSignature()
    {
        return sha1(
            $this->getTransactionId() . $this->getAmountInteger() . $this->getClientSecret()
        );
    }

    public function getData()
    {
        $this->validate(
            'amount',
            'transactionId',
            'returnUrl'
        );

        $data = array(
            "clientId" => $this->getClientId(),
            "transactionId" => $this->getTransactionId(),
            "amount" => $this->getAmountInteger(),
            "description" => $this->getDescription(),
            "returnUrl" => $this->getReturnUrl(),
            "sha1" => $this->generateSignature()
        );

        return $data;
    }

    public function sendData($data)
    {
        $httpResponse = $this->httpClient->post($this->endpoint, null, $data)->send();
        return $this->response = new PurchaseResponse($this, $httpResponse->json());
    }
}