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<?php
namespace CryptAPI;
use Exception;
class CryptAPI {
private static $base_url = "https://api.cryptapi.io";
private $valid_coins = [];
private $own_address = null;
private $payment_address = null;
private $callback_url = null;
private $coin = null;
private $ca_params = [];
private $parameters = [];
public static $COIN_MULTIPLIERS = [
'btc' => 10**8,
'bch' => 10**8,
'ltc' => 10**8,
'eth' => 10**18,
'iota' => 10**6,
'xmr' => 10**12,
'trx' => 10**6,
];
public function __construct($coin, $own_address, $callback_url, $parameters=[], $ca_params=[]) {
$this->valid_coins = CryptAPI::get_supported_coins();
if (!in_array($coin, $this->valid_coins)) {
$vc = print_r($this->valid_coins, true);
throw new Exception("Unsupported Coin: {$coin}, Valid options are: {$vc}");
}
$this->own_address = $own_address;
$this->callback_url = $callback_url;
$this->coin = $coin;
$this->ca_params = $ca_params;
$this->parameters = $parameters;
}
public static function get_supported_coins() {
$info = CryptAPI::get_info(null, true);
if (empty($info)) {
return null;
}
unset($info['fee_tiers']);
$coins = [];
foreach ($info as $chain => $data) {
$is_base_coin = in_array('ticker', array_keys($data));
if ($is_base_coin) {
$coins[] = $chain;
continue;
}
$base_ticker = "{$chain}_";
foreach ($data as $token => $subdata) {
$coins[] = $base_ticker . $token;
}
}
return $coins;
}
public function get_address() {
if (empty($this->own_address) || empty($this->coin) || empty($this->callback_url)) return null;
$callback_url = $this->callback_url;
if (!empty($this->parameters)) {
$req_parameters = http_build_query($this->parameters);
$callback_url = "{$this->callback_url}?{$req_parameters}";
}
$ca_params = array_merge([
'callback' => $callback_url,
'address' => $this->own_address,
], $this->ca_params);
$response = CryptAPI::_request($this->coin, 'create', $ca_params);
if ($response->status == 'success') {
$this->payment_address = $response->address_in;
return $response->address_in;
}
return null;
}
public function check_logs() {
if (empty($this->coin) || empty($this->callback_url)) return null;
$params = [
'callback' => $this->callback_url,
];
$response = CryptAPI::_request($this->coin, 'logs', $params);
if ($response->status == 'success') {
return $response;
}
return null;
}
public function get_qrcode($value = false, $size = false) {
if (empty($this->coin)) return null;
$params = [
'address' => $this->payment_address,
];
if ($value) $params['value'] = $value;
if ($size) $params['size'] = $size;
$response = CryptAPI::_request($this->coin, 'qrcode', $params);
if ($response->status == 'success') {
return $response;
}
return null;
}
public static function get_info($coin = null, $assoc = false) {
$params = [];
if (empty($coin)) {
$params['prices'] = '0';
}
$response = CryptAPI::_request($coin, 'info', $params, $assoc);
if (empty($coin) || $response->status == 'success') {
return $response;
}
return null;
}
public static function get_estimate($coin, $addresses = 1, $priority = 'default') {
$response = CryptAPI::_request($coin, 'estimate', [
'addresses' => $addresses,
'priority' => $priority
]);
if ($response->status == 'success') {
return $response;
}
return null;
}
public static function get_convert($coin, $value, $from) {
$response = CryptAPI::_request($coin, 'convert', [
'value' => $value,
'from' => $from
]);
if ($response->status == 'success') {
return $response;
}
return null;
}
public static function process_callback($_get) {
$params = [
'address_in' => $_get['address_in'],
'address_out' => $_get['address_out'],
'txid_in' => $_get['txid_in'],
'txid_out' => isset($_get['txid_out']) ? $_get['txid_out'] : null,
'confirmations' => $_get['confirmations'],
'value' => $_get['value'],
'value_coin' => $_get['value_coin'],
'value_forwarded' => isset($_get['value_forwarded']) ? $_get['value_forwarded'] : null,
'value_forwarded_coin' => isset($_get['value_forwarded_coin']) ? $_get['value_forwarded_coin'] : null,
'coin' => $_get['coin'],
'pending' => isset($_get['pending']) ? $_get['pending'] : false,
];
foreach ($_get as $k => $v) {
if (isset($params[$k])) continue;
$params[$k] = $_get[$k];
}
return $params;
}
private static function _request($coin, $endpoint, $params = [], $assoc = false) {
$base_url = Cryptapi::$base_url;
$coin = str_replace('_', '/', $coin);
if (!empty($params)) $data = http_build_query($params);
if (!empty($coin)) {
$coin = str_replace('_', '/', $coin);
$url = "{$base_url}/{$coin}/{$endpoint}/";
} else {
$url = "{$base_url}/{$endpoint}/";
}
if (!empty($data)) $url .= "?{$data}";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$response = curl_exec($ch);
curl_close($ch);
return json_decode($response, $assoc);
}
}