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Example request​

<?php

$shopId = ""; // Payment Point ID
$secretPhrase = ""; // Payment Point Secret
$mainUrl = "https://pay.cashbill.pl/ws/rest";
$ch = curl_init();


$transactionRequest = array(
    "title" => "Example #1",
    "amount" => array(
        "value" => 1.23,
        "currencyCode" => "PLN",
    ),
    "returnUrl" => "https://cashbill.pl",
    "description" => "Transaction description example",
    "additionalData" => "#1",
);


$transactionRequest['sign'] = sha1($transactionRequest['title']
    . $transactionRequest['amount']['value'] . $transactionRequest['amount']['currencyCode']
    . $transactionRequest['returnUrl'] . $transactionRequest['description'] . $transactionRequest['additionalData']
    . $secretPhrase);


curl_setopt_array($ch, array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_URL => "{$mainUrl}/payment/{$shopId}",
    CURLOPT_HTTPHEADER =>  array("Content-Type: application/json"),
    CURLOPT_POSTFIELDS => json_encode($transactionRequest)
));

$ret = curl_exec($ch);
$response = json_decode($ret);

if (curl_getinfo($ch, CURLINFO_HTTP_CODE) != "200") {
    echo "Error message: {$response->errorMessage}";
} else {
    echo "Order ID [{$response->id}] and redirect URL [{$response->redirectUrl}]";
}

Schema of the response​

{
  "id": "string",
  "redirectUrl": "string"
}