/**
* Validates amount to ensure it follows the rules of monero
*
* @param string|float amount
* @return bool
*/
public function valid_amount($amount)
{
if (!is_numeric($amount)) {
return FALSE;
}
// XMR is limited to 12 decimals
if (bc::count_decimals($amount) > 12) {
return FALSE;
}
#// The maximum payment is depended on your system, 32-bit is 10 digits and 64-bit is 19 digits
#$max_digits = strlen(PHP_INT_MAX);
// PHP 64-bit does not support more than 9223372036854775807 (19-digits)
if (bc::is($amount, '>=', '9223372.036854775807')) {
return FALSE;
}
return TRUE;
}
$payment_ids = $pids->fetch_assoc();
// Credit user his funds (if user has no balance for this asset, we create it, otherwise update)
$db->query("INSERT INTO \n users_assets (`user_id`, `asset_id`, `balance`) \n VALUES \n (" . $payment_ids['user_id'] . "," . $asset->get_id() . "," . $row['amount'] . ")\n ON DUPLICATE KEY UPDATE \n `balance` = balance + " . $row['amount'] . ";");
}
}
$db->query('COMMIT');
// --------------------------------------------------------------------
//
// Process pending withdraws
//
// --------------------------------------------------------------------
$result = $db->query('SELECT * FROM withdraws_pending WHERE status = 1 ORDER BY id ASC LIMIT 1000');
$payments = array();
while ($row = $result->fetch_array(MYSQL_ASSOC)) {
// If there is not enough balance, we'll try again later ("break" instead of "continue" so that payment are processed as a queue, most fair)
if (bc::is($row['amount'], '>', $wallet->get_unlocked_balance())) {
break;
}
// In rare cases that bulk_transfer sends payment, but script does a rollback, the transfer will not be repeated by setting status to error first (requiring manual approval):
$db->query("UPDATE withdraws_pending SET status = -1, error = 'PAYMENT IN PROCESS' WHERE id = " . $row['id']);
$tx_id = $wallet->transfer($row['address'], $row['amount'], $row['payment_id'], $row['mixin'], $row['fee'], 0);
$db->query('START TRANSACTION');
if (!$tx_id) {
$errors = $wallet->get_errors();
$error_message = (isset($errors[0]) and isset($errors[0]['message'])) ? $errors[0]['message'] : 'Unknown error';
$db->query("UPDATE withdraws_pending SET error = " . quote_escape($error_message) . " WHERE id = " . $row['id']);
} else {
$sql = insert_query('withdraws_complete', array('user_id' => $row['user_id'], 'address' => $row['address'], 'amount' => $row['amount'], 'fee' => $row['fee'], 'date_paid' => array('UTC_TIMESTAMP()'), 'asset_id' => $row['asset_id'], 'mixin' => $row['mixin'], 'txn' => $tx_id));
$db->query($sql);
$db->query("DELETE FROM withdraws_pending WHERE id = " . $row['id']);
}
$asset_config = $config['asset'][XMR];
$asset_id = $asset->get_id();
$user_id = $user->id();
$payment_id = null;
$balance = null;
$balance = $asset->get_balance($user);
$payment_id = $asset->get_payment_id($user);
// If payment id was not found, create one
if (!$payment_id or isset($_POST['new_payment_id'])) {
$asset->create_payment_id($user);
refresh();
}
if (isset($_POST['withdraw_xmr'])) {
$amount = trim($_POST['xmr_amount']);
// Prepare POST data
$post = array('address' => trim($_POST['xmr_address']), 'payment_id' => trim($_POST['xmr_payment_id']), 'amount' => $amount, 'mixin' => filter_var($_POST['xmr_mixin'], FILTER_VALIDATE_INT, array('options' => array('default' => $asset_config['default_mixin'], 'min_range' => $asset_config['min_mixin'], 'max_range' => $asset_config['max_mixin']))), 'receivable_amount' => bc::op($amount, '-', $asset_config['withdraw_fee']), 'asset_id' => $asset->id);
if (!csrf_check($_POST['csrf_token'])) {
$error->set('xmr_address', 'Invalid CSRF, session expired. Please refresh.');
}
if (!$asset->valid_address($post['address'])) {
$error->set('xmr_address', 'Please enter a valid XMR Address');
}
if (!$asset->valid_payment_id($post['payment_id'])) {
$error->set('xmr_payment_id', 'Please enter a valid Payment ID (64 characters, alpha-numeric string) or leave the field empty to send without payment id');
}
if (!$asset->valid_amount($post['amount'])) {
$error->set('xmr_amount', 'Enter a valid amount');
}
if (!$asset->valid_withdraw($post['amount'], $asset_config['withdraw_fee'])) {
$error->set('xmr_amount', 'Enter a valid amount');
}
/**
* Transfer to multiple people at once (but with same payment id)
*
* @param array an array in following format:
* array(
* array(
* 'amount' => 0.1,
* 'address' => 'ADDRESS HERE'
* ),
* array(
* 'amount' => '2.1',
* 'address' => 'ADDRESS HERE'
* )
* @param string payment id, 64-character long string (optional)
* @param decimal fee amount in XMR
* @param int mixin count
* @param int unlock time
* @return string|bool if transfer was successful (all of them) it will
* return transaction id, if any error occured no
* transfers will be made and the function will
* return false. Use $this->get_errors() to get error
*/
public function bulk_transfer($destinations = array(), $payment_id = '', $mixin = 3, $fee = 0.01, $unlock_time = 0)
{
// Convert decimals to integer, but without casting to int. Due to limits of PHP 32/64-bit we must store as string.
foreach ($destinations as &$destination) {
$destination['amount'] = bc::strip_trailing_zeros(bc::mul($destination['amount'], $this->multiplier));
}
$params = array('destinations' => $destinations, 'payment_id' => $payment_id, 'fee' => bc::strip_trailing_zeros(bc::mul($fee, $this->multiplier)), 'mixin' => $mixin, 'unlock_time' => $unlock_time);
$result = $this->_execute('transfer', $params, array('destinations' => array('amount'), 'fee'));
if (isset($result['tx_hash'])) {
return trim($result['tx_hash'], '<>');
}
return false;
}
/**
* Check if user has sufficient balance
*
* @param object user
* @param decimal amount to check
* @return bool true if enough balance (equal or more)
*/
public function available_balance($user, $amount)
{
return (bool) bc::is($this->get_balance($user), '>=', $amount);
}
/**
* Validates withdraw (minimum withdraw)
*
* @param string|float amount
* @param string|float fee
* @return bool
*/
public function valid_withdraw($amount, $fee)
{
global $config;
$amount_after_fee = bc::op($amount, '-', $fee);
// Check if amount after fee is negative
if (bc::is($amount_after_fee, '=<', '0')) {
return FALSE;
}
// Enforce minimum withdraw
return (bool) (bccomp($amount, $config['asset'][$this->id]['min_withdraw']) !== -1);
}