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krbwc-utils.php
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<?php
/*
Karbo for WooCommerce
https://github.com/Karbovanets/karbo-woocommerce/
*/
//===========================================================================
function KRBWC__generate_new_Karbo_payment_id ($krbwc_settings=false, $order_info)
{
global $wpdb;
$krb_payments_table_name = $wpdb->prefix . 'krbwc_krb_payments';
if (!$krbwc_settings)
$krbwc_settings = KRBWC__get_settings ();
$wallet_api = New ForkNoteWalletd("http://127.0.0.1:18888");
$new_krb_payment_id = $wallet_api->makePaymentId();
try {
$status = $wallet_api->getStatus();
$next_key_index = $status["blockCount"];
} catch(Exception $e) {
$next_key_index = 0;
}
$krb_address = $krbwc_settings['address'];
$address_request_array = array();
// Retrieve current balance at address considering required confirmations number and api_timemout value.
$address_request_array['krb_address'] = $krb_address;
$address_request_array['krb_payment_id'] = $new_krb_payment_id;
$address_request_array['block_index'] = 100000; //@TODO variable for starting block to check for payment id
$address_request_array['required_confirmations'] = 0;
$address_request_array['api_timeout'] = $krbwc_settings['blockchain_api_timeout_secs'];
$ret_info_array = KRBWC__getreceivedbyaddress_info ($address_request_array, $krbwc_settings);
// $total_new_keys_generated ++;
if ($ret_info_array['balance'] === false)
$status = 'unknown';
else if ($ret_info_array['balance'] == 0)
$status = 'assigned'; // Newly generated address with freshly checked zero balance is unused and will be assigned.
else
$status = 'used'; // Generated address that was already used to receive money.
$funds_received = ($ret_info_array['balance'] === false)?0:$ret_info_array['balance'];
$received_funds_checked_at_time = ($ret_info_array['balance'] === false)?0:time();
$assigned_at_time = ($ret_info_array['balance'] === false)?0:time();
// Prepare `address_meta` field for this clean address and payment_id.
$address_meta['orders'] = array();
array_unshift ($address_meta['orders'], $order_info); // Prepend new order to array of orders
$address_meta_serialized = KRBWC_serialize_address_meta ($address_meta);
//$remote_addr = $order_info['requested_by_ip'];
// Insert newly generated address into DB
$query = "INSERT INTO `$krb_payments_table_name` (`krb_address`, `krb_payment_id`, `origin_id`, `index_in_wallet`, `status`, `total_received_funds`, `received_funds_checked_at`, `assigned_at`, `address_meta`) VALUES ('$krb_address', '$new_krb_payment_id', 'none', '$next_key_index', '$status', '$funds_received', '$received_funds_checked_at_time', '$assigned_at_time', '$address_meta_serialized');";
$ret_code = $wpdb->query($query);
return $new_krb_payment_id;
}
//===========================================================================
//===========================================================================
// Function makes sure that returned value is valid array
function KRBWC_unserialize_address_meta ($flat_address_meta)
{
$unserialized = @unserialize($flat_address_meta);
if (is_array($unserialized))
return $unserialized;
return array();
}
//===========================================================================
//===========================================================================
// Function makes sure that value is ready to be stored in DB
function KRBWC_serialize_address_meta ($address_meta_arr)
{
return KRBWC__safe_string_escape(serialize($address_meta_arr));
}
//===========================================================================
//===========================================================================
/*
$address_request_array = array (
'krb_payment_id' => '1xxxxxxx',
'required_confirmations' => '6',
'api_timeout' => 10,
);
$ret_info_array = array (
'result' => 'success',
'message' => "",
'host_reply_raw' => "",
'balance' => false == error, else - balance
);
*/
function KRBWC__getreceivedbyaddress_info ($address_request_array, $krbwc_settings=false)
{
if (!$krbwc_settings)
$krbwc_settings = KRBWC__get_settings ();
$krb_address = $address_request_array['krb_address'];
$krb_payment_id = $address_request_array['krb_payment_id'];
$first_block_index = $address_request_array['block_index'];
$required_confirmations = $address_request_array['required_confirmations'];
$api_timeout = $address_request_array['api_timeout'];
$funds_received = false;
$fnw = New ForkNoteWalletd("http://127.0.0.1:18888");
$status = $fnw->getStatus();
$t = $fnw->getTransactions( $status["blockCount"] - 50000, false, 50000, $krb_payment_id, [$krb_address]);
// print_r( $t );
$total = 0;
foreach($t['items'] as $transaction) {
//echo "Block: ".$transaction['blockHash'] ."<br>\n";
$tnum = 0;
foreach($transaction['transactions'] as $bt) {
//echo "#: $tnum amt". $bt['amount'] . " <br>\n";
$tnum++;
$funds_received = $bt['amount'];
$blockIndex = $bt['blockIndex'];
if (is_numeric($funds_received)) {
$funds_received = sprintf("%.12f", $funds_received / 1000000000000.0);
$confirmations = ($status["blockCount"] - $blockIndex);
//echo "Recieved: $funds_received in block: $blockIndex ($confirmations confirmations) " .$transaction['blockHash'] ."<br>\n";
if ($confirmations >= $required_confirmations)
$total += $funds_received;
}
}
}
$funds_received = $total;
if (is_numeric($funds_received))
{
$ret_info_array = array (
'result' => 'success',
'message' => "",
'host_reply_raw' => "",
'balance' => $funds_received,
);
}
else
{
$ret_info_array = array (
'result' => 'error',
'message' => "Failed to get balance.\n",
'host_reply_raw' => "",
'balance' => false,
);
}
return $ret_info_array;
}
//===========================================================================
//===========================================================================
// Returns:
// success: number of currency units (dollars, etc...) would take to convert to 1 Karbo, ex: "15.32476".
// failure: false
//
// $currency_code, one of: USD, AUD, CAD, CHF, CNY, DKK, EUR, GBP, HKD, JPY, NZD, PLN, RUB, SEK, SGD, THB
// $rate_retrieval_method
// 'getfirst' -- pick first successfully retireved rate
// 'getall' -- retrieve from all possible exchange rate services and then pick the best rate.
//
// $get_ticker_string - true - HTML formatted text message instead of pure number returned.
function KRBWC__get_exchange_rate_per_Karbo ($currency_code, $rate_retrieval_method = 'getfirst', $get_ticker_string=false)
{
if ($currency_code == 'KRB')
return "1.00"; // 1:1
$krbwc_settings = KRBWC__get_settings ();
$exchange_rate_type = $krbwc_settings['exchange_rate_type'];
$exchange_multiplier = $krbwc_settings['exchange_multiplier'];
if (!$exchange_multiplier)
$exchange_multiplier = 1;
$current_time = time();
$cache_hit = false;
$requested_cache_method_type = $rate_retrieval_method . '|' . $exchange_rate_type;
$ticker_string = "<span style='color:#222;'>According to your settings (including multiplier), current calculated rate for 1 Karbo (in {$currency_code})={{{EXCHANGE_RATE}}}</span>";
$ticker_string_error = "<span style='color:red;background-color:#FFA'>WARNING: Cannot determine exchange rates (for '$currency_code')! {{{ERROR_MESSAGE}}} Make sure your PHP settings are configured properly and your server can (is allowed to) connect to external WEB services via PHP.</wspan>";
$this_currency_info = @$krbwc_settings['exchange_rates'][$currency_code][$requested_cache_method_type];
if ($this_currency_info && isset($this_currency_info['time-last-checked']))
{
$delta = $current_time - $this_currency_info['time-last-checked'];
if ($delta < (@$krbwc_settings['cache_exchange_rates_for_minutes'] * 60))
{
// Exchange rates cache hit
// Use cached value as it is still fresh.
$final_rate = $this_currency_info['exchange_rate'] / $exchange_multiplier;
if ($get_ticker_string)
return str_replace('{{{EXCHANGE_RATE}}}', $final_rate, $ticker_string);
else
return $final_rate;
}
}
$exchange_rate = KRBWC__get_exchange_rate_from_cryptocompare($currency_code, $exchange_rate_type, $krbwc_settings);
// Save new currency exchange rate info in cache
KRBWC__update_exchange_rate_cache ($currency_code, $requested_cache_method_type, $exchange_rate);
if ($get_ticker_string)
{
if ($exchange_rate)
{
return str_replace('{{{EXCHANGE_RATE}}}', $exchange_rate / $exchange_multiplier, $ticker_string);
}
else
{
$extra_error_message = "";
$fns = array ('file_get_contents', 'curl_init', 'curl_setopt', 'curl_setopt_array', 'curl_exec');
$fns = array_filter ($fns, 'KRBWC__function_not_exists');
if (count($fns))
$extra_error_message = "The following PHP functions are disabled on your server: " . implode (", ", $fns) . ".";
return str_replace('{{{ERROR_MESSAGE}}}', $extra_error_message, $ticker_string_error);
}
}
else
return $exchange_rate / $exchange_multiplier;
}
//===========================================================================
//===========================================================================
function KRBWC__function_not_exists ($fname) { return !function_exists($fname); }
//===========================================================================
//===========================================================================
function KRBWC__update_exchange_rate_cache ($currency_code, $requested_cache_method_type, $exchange_rate)
{
// Save new currency exchange rate info in cache
$krbwc_settings = KRBWC__get_settings (); // Re-get settings in case other piece updated something while we were pulling exchange rate API's...
$krbwc_settings['exchange_rates'][$currency_code][$requested_cache_method_type]['time-last-checked'] = time();
$krbwc_settings['exchange_rates'][$currency_code][$requested_cache_method_type]['exchange_rate'] = $exchange_rate;
KRBWC__update_settings ($krbwc_settings);
}
//===========================================================================
//===========================================================================
// $rate_type: 'vwap' | 'realtime' | 'bestrate'
function KRBWC__get_exchange_rate_from_cryptocompare ($currency_code, $rate_type, $krbwc_settings)
{
$source_url = "https://min-api.cryptocompare.com/data/price?fsym=KRB&tsyms=" . $currency_code;
$result = @KRBWC__file_get_contents ($source_url, false, $krbwc_settings['exchange_rate_api_timeout_secs']);
$rate_obj = @json_decode(trim($result), true);
// Only realtime rate is available
return @$rate_obj[$currency_code];
}
//===========================================================================
//===========================================================================
/*
Get web page contents with the help of PHP cURL library
Success => content
Error => if ($return_content_on_error == true) $content; else FALSE;
*/
function KRBWC__file_get_contents ($url, $return_content_on_error=false, $timeout=60, $user_agent=FALSE, $is_post=false, $post_data="")
{
if (!function_exists('curl_init'))
{
if (!$is_post)
{
$ret_val = @file_get_contents ($url);
return $ret_val;
}
else
{
return false;
}
}
$p = substr(md5(microtime()), 24) . 'bw'; // curl post padding
$ch = curl_init ();
if ($is_post)
{
$new_post_data = $post_data;
if (is_array($post_data))
{
foreach ($post_data as $k => $v)
{
$safetied = $v;
if (is_object($safetied))
$safetied = KRBWC__object_to_array($safetied);
if (is_array($safetied))
{
$safetied = serialize($safetied);
$safetied = $p . str_replace('=', '_', KRBWC__base64_encode($safetied));
$new_post_data[$k] = $safetied;
}
}
}
}
{
// To accomodate older PHP 5.0.x systems
curl_setopt ($ch, CURLOPT_URL , $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER , true); // return web page
curl_setopt ($ch, CURLOPT_HEADER , false); // don't return headers
curl_setopt ($ch, CURLOPT_ENCODING , ""); // handle compressed
curl_setopt ($ch, CURLOPT_USERAGENT , $user_agent?$user_agent:urlencode("Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.12 (KHTML, like Gecko) Chrome/9.0.576.0 Safari/534.12")); // who am i
curl_setopt ($ch, CURLOPT_AUTOREFERER , true); // set referer on redirect
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT , $timeout); // timeout on connect
curl_setopt ($ch, CURLOPT_TIMEOUT , $timeout); // timeout on response in seconds.
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION , true); // follow redirects
curl_setopt ($ch, CURLOPT_MAXREDIRS , 10); // stop after 10 redirects
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER , false); // Disable SSL verifications
if ($is_post) { curl_setopt ($ch, CURLOPT_POST, true); }
if ($is_post) { curl_setopt ($ch, CURLOPT_POSTFIELDS, $new_post_data); }
}
$content = curl_exec ($ch);
$err = curl_errno ($ch);
$header = curl_getinfo($ch);
// $errmsg = curl_error ($ch);
curl_close ($ch);
if (!$err && $header['http_code']==200)
return trim($content);
else
{
if ($return_content_on_error)
return trim($content);
else
return FALSE;
}
}
//===========================================================================
//===========================================================================
function KRBWC__object_to_array ($object)
{
if (!is_object($object) && !is_array($object))
return $object;
return array_map('KRBWC__object_to_array', (array) $object);
}
//===========================================================================
//===========================================================================
// Credits: http://www.php.net/manual/en/function.mysql-real-escape-string.php#100854
function KRBWC__safe_string_escape ($str="")
{
$len=strlen($str);
$escapeCount=0;
$targetString='';
for ($offset=0; $offset<$len; $offset++)
{
switch($c=$str{$offset})
{
case "'":
// Escapes this quote only if its not preceded by an unescaped backslash
if($escapeCount % 2 == 0) $targetString.="\\";
$escapeCount=0;
$targetString.=$c;
break;
case '"':
// Escapes this quote only if its not preceded by an unescaped backslash
if($escapeCount % 2 == 0) $targetString.="\\";
$escapeCount=0;
$targetString.=$c;
break;
case '\\':
$escapeCount++;
$targetString.=$c;
break;
default:
$escapeCount=0;
$targetString.=$c;
}
}
return $targetString;
}
//===========================================================================
//===========================================================================
// Syntax:
// KRBWC__log_event (__FILE__, __LINE__, "Hi!");
// KRBWC__log_event (__FILE__, __LINE__, "Hi!", "/..");
// KRBWC__log_event (__FILE__, __LINE__, "Hi!", "", "another_log.php");
function KRBWC__log_event ($filename, $linenum, $message, $prepend_path="", $log_file_name='__log.php')
{
$log_filename = dirname(__FILE__) . $prepend_path . '/' . $log_file_name;
$logfile_header = "<?php exit(':-)'); ?>\n" . '/* =============== KarboWC LOG file =============== */' . "\r\n";
$logfile_tail = "\r\nEND";
// Delete too long logfiles.
//if (@file_exists ($log_filename) && filesize($log_filename)>1000000)
// unlink ($log_filename);
$filename = basename ($filename);
if (@file_exists ($log_filename))
{
// 'r+' non destructive R/W mode.
$fhandle = @fopen ($log_filename, 'r+');
if ($fhandle)
@fseek ($fhandle, -strlen($logfile_tail), SEEK_END);
}
else
{
$fhandle = @fopen ($log_filename, 'w');
if ($fhandle)
@fwrite ($fhandle, $logfile_header);
}
if ($fhandle)
{
@fwrite ($fhandle, "\r\n// " . $_SERVER['REMOTE_ADDR'] . '(' . $_SERVER['REMOTE_PORT'] . ')' . ' -> ' . date("Y-m-d, G:i:s T") . "|" . KRBWC_VERSION . "/" . KRBWC_EDITION . "|$filename($linenum)|: " . $message . $logfile_tail);
@fclose ($fhandle);
}
}
//===========================================================================
//===========================================================================
function KRBWC__SubIns ()
{
return;
}
//===========================================================================
//===========================================================================
function KRBWC__send_email ($email_to, $email_from, $subject, $plain_body)
{
$message = "
<html>
<head>
<title>$subject</title>
</head>
<body>" . $plain_body . "
</body>
</html>
";
// To send HTML mail, the Content-type header must be set
$headers = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
// Additional headers
$headers .= "From: " . $email_from . "\r\n"; //"From: Birthday Reminder <[email protected]>" . "\r\n";
// Mail it
$ret_code = @mail ($email_to, $subject, $message, $headers);
return $ret_code;
}
//===========================================================================
//===========================================================================
function KRBWC__is_gateway_valid_for_use (&$ret_reason_message=NULL)
{
$valid = true;
$krbwc_settings = KRBWC__get_settings ();
//// 'service_provider' => 'local_wallet', // 'blockchain_info'
//----------------------------------
// Validate settings
if ($krbwc_settings['service_provider']=='local_wallet')
{
$krbwc_settings = KRBWC__get_settings();
$address = $krbwc_settings['address'];
try{
$wallet_api = New ForkNoteWalletd("http://127.0.0.1:18888");
$address_balance = $wallet_api->getBalance($address);
}
catch(Exception $e) {
}
if (!$address)
{
$reason_message = __("Please specify Wallet Address in Karbo plugin settings.", 'woocommerce');
$valid = false;
}
// @TODO
// else if (!preg_match ('/^xpub[a-zA-Z0-9]{98}$/', $address))
// {
// $reason_message = __("Karbo Address ($address) is invalid. Must be 98 characters long, consisting of digits and letters.", 'woocommerce');
// $valid = false;
// }
else if ($address_balance === false)
{
$reason_message = __("Karbo address is not found in wallet.", 'woocommerce');
$valid = false;
}
}
if (!$valid)
{
if ($ret_reason_message !== NULL)
$ret_reason_message = $reason_message;
return false;
}
//----------------------------------
//----------------------------------
// Validate connection to exchange rate services
$store_currency_code = 'USD';
if ($store_currency_code != 'KRB')
{
$currency_rate = KRBWC__get_exchange_rate_per_Karbo ($store_currency_code, 'getfirst', false);
if (!$currency_rate)
{
$valid = false;
// Assemble error message.
$error_msg = "ERROR: Cannot determine exchange rates (for '$store_currency_code')! {{{ERROR_MESSAGE}}} Make sure your PHP settings are configured properly and your server can (is allowed to) connect to external WEB services via PHP.";
$extra_error_message = "";
$fns = array ('file_get_contents', 'curl_init', 'curl_setopt', 'curl_setopt_array', 'curl_exec');
$fns = array_filter ($fns, 'KRBWC__function_not_exists');
$extra_error_message = "";
if (count($fns))
$extra_error_message = "The following PHP functions are disabled on your server: " . implode (", ", $fns) . ".";
$reason_message = str_replace('{{{ERROR_MESSAGE}}}', $extra_error_message, $error_msg);
if ($ret_reason_message !== NULL)
$ret_reason_message = $reason_message;
return false;
}
}
return true;
//----------------------------------
}
//===========================================================================
//===========================================================================
// Some hosting services disables base64_encode/decode.
// this is equivalent replacement to fix errors.
function KRBWC__base64_decode($input)
{
if (function_exists('base64_decode'))
return base64_decode($input);
$keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
$chr1 = $chr2 = $chr3 = "";
$enc1 = $enc2 = $enc3 = $enc4 = "";
$i = 0;
$output = "";
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
$input = preg_replace("[^A-Za-z0-9\+\/\=]", "", $input);
do {
$enc1 = strpos($keyStr, substr($input, $i++, 1));
$enc2 = strpos($keyStr, substr($input, $i++, 1));
$enc3 = strpos($keyStr, substr($input, $i++, 1));
$enc4 = strpos($keyStr, substr($input, $i++, 1));
$chr1 = ($enc1 << 2) | ($enc2 >> 4);
$chr2 = (($enc2 & 15) << 4) | ($enc3 >> 2);
$chr3 = (($enc3 & 3) << 6) | $enc4;
$output = $output . chr((int) $chr1);
if ($enc3 != 64) {
$output = $output . chr((int) $chr2);
}
if ($enc4 != 64) {
$output = $output . chr((int) $chr3);
}
$chr1 = $chr2 = $chr3 = "";
$enc1 = $enc2 = $enc3 = $enc4 = "";
} while ($i < strlen($input));
return urldecode($output);
}
function KRBWC__base64_encode($data)
{
if (function_exists('base64_encode'))
return base64_encode($data);
$b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
$o1 = $o2 = $o3 = $h1 = $h2 = $h3 = $h4 = $bits = $i = 0;
$ac = 0;
$enc = '';
$tmp_arr = array();
if (!$data) {
return data;
}
do {
// pack three octets into four hexets
$o1 = KRBWC_charCodeAt($data, $i++);
$o2 = KRBWC_charCodeAt($data, $i++);
$o3 = KRBWC_charCodeAt($data, $i++);
$bits = $o1 << 16 | $o2 << 8 | $o3;
$h1 = $bits >> 18 & 0x3f;
$h2 = $bits >> 12 & 0x3f;
$h3 = $bits >> 6 & 0x3f;
$h4 = $bits & 0x3f;
// use hexets to index into b64, and append result to encoded string
$tmp_arr[$ac++] = KRBWC_charAt($b64, $h1).KRBWC_charAt($b64, $h2).KRBWC_charAt($b64, $h3).KRBWC_charAt($b64, $h4);
} while ($i < strlen($data));
$enc = implode($tmp_arr, '');
$r = (strlen($data) % 3);
return ($r ? substr($enc, 0, ($r - 3)) : $enc) . substr('===', ($r || 3));
}
function KRBWC_charCodeAt($data, $char) {
return ord(substr($data, $char, 1));
}
function KRBWC_charAt($data, $char) {
return substr($data, $char, 1);
}
//===========================================================================