Viewing file:  CoinpaymentsCurlRequest.php (4.51 KB) -rw-rw-r--
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<?php
require('CoinpaymentsValidator.php');
class CoinpaymentsCurlRequest
{
private $private_key = '';
private $public_key = '';
private $format = 'json';
private $curl_handle;
public function __construct($private_key, $public_key, $format)
{
$this->private_key = $private_key;
$this->public_key = $public_key;
$this->format = $format;
$this->curl_handle = null;
}
public function __destruct() {
if ($this->curl_handle !== null) {
// Close the cURL session
curl_close($this->curl_handle);
}
}
/**
* Executes a cURL request to the CoinPayments.net API.
*
* @param string $command The API command to call.
* @param array $fields The required and optional fields to pass with the command.
*
* @return array Result data with error message. Error will equal "ok" if call was a success.
*
* @throws Exception If an invalid format is passed.
*/
public function execute($command, array $fields = [])
{
// Define the API url
$api_url = 'https://www.coinpayments.net/api.php';
// Validate the passed fields
$validator = new CoinpaymentsValidator($command, $fields);
$validate_fields = $validator->validate();
if (strpos($validate_fields, 'Error') !== FALSE) {
echo $validate_fields;
exit();
} else {
// Set default field values
$fields['version'] = 1;
$fields['format'] = $this->format;
$fields['key'] = $this->public_key;
$fields['cmd'] = $command;
// Throw an error if the format is not equal to json or xml
if ($fields['format'] != 'json' && $fields['format'] != 'xml') {
return ['error' => 'Invalid response format passed. Please use "json" or "xml" as a format value'];
}
// Generate query string from fields
$post_fields = http_build_query($fields, '', '&');
// Generate the HMAC hash from the query string and private key
$hmac = hash_hmac('sha512', $post_fields, $this->private_key);
// Check the cURL handle has not already been initiated
if ($this->curl_handle === null) {
// Initiate the cURL handle and set initial options
$this->curl_handle = curl_init($api_url);
curl_setopt($this->curl_handle, CURLOPT_FAILONERROR, TRUE);
curl_setopt($this->curl_handle, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($this->curl_handle, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($this->curl_handle, CURLOPT_POST, TRUE);
}
// Set HMAC header for cURL
curl_setopt($this->curl_handle, CURLOPT_HTTPHEADER, array('HMAC:' . $hmac));
// Set HTTP POST fields for cURL
curl_setopt($this->curl_handle, CURLOPT_POSTFIELDS, $post_fields);
// Execute the cURL session
$response = curl_exec($this->curl_handle);
// Check the response of the cURL session
if ($response !== FALSE) {
$result = false;
// Check the requested format
if ($fields['format'] == 'json') {
// Prepare json result
if (PHP_INT_SIZE < 8 && version_compare(PHP_VERSION, '5.4.0') >= 0) {
// We are on 32-bit PHP, so use the bigint as string option.
// If you are using any API calls with Satoshis it is highly NOT recommended to use 32-bit PHP
$decoded = json_decode($response, TRUE, 512, JSON_BIGINT_AS_STRING);
} else {
$decoded = json_decode($response, TRUE);
}
// Check the json decoding and set an error in the result if it failed
if ($decoded !== NULL && count($decoded)) {
$result = $decoded;
} else {
$result = ['error' => 'Unable to parse JSON result (' . json_last_error() . ')'];
}
} else {
// Set the result to the response
$result = $response;
}
} else {
// Throw an error if the response of the cURL session is false
$result = ['error' => 'cURL error: ' . curl_error($this->curl_handle)];
}
return $result;
}
}
}
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