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bwwc-cron.php
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bwwc-cron.php
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<?php
/*
Bitcoin Payments for WooCommerce
http://www.bitcoinway.com/
*/
// Include everything
define('BWWC_MUST_LOAD_WP', '1');
include (dirname(__FILE__) . '/bwwc-include-all.php');
// Cpanel-scheduled cron job call
if (@$_REQUEST['hardcron']=='1')
BWWC_cron_job_worker (true);
//===========================================================================
// '$hardcron' == true if job is ran by Cpanel's cron job.
function BWWC_cron_job_worker ($hardcron=false)
{
global $wpdb;
//////
//////BWWC__log_event (__FILE__, __LINE__, "Cron job: entered with hardcron='" . $hardcron . "'");
//////
$bwwc_settings = BWWC__get_settings ();
if (@$bwwc_settings['gateway_settings']['service_provider'] != 'electrum-wallet')
{
return; // Only active electrum wallet as a service provider needs cron job
}
// status = "unused", "assigned", "used"
$btc_addresses_table_name = $wpdb->prefix . 'bwwc_btc_addresses';
$funds_received_value_expires_in_secs = $bwwc_settings['funds_received_value_expires_in_mins'] * 60;
$assigned_address_expires_in_secs = $bwwc_settings['assigned_address_expires_in_mins'] * 60;
$confirmations_required = $bwwc_settings['gateway_settings']['confirmations'];
$clean_address = NULL;
$current_time = time();
// Search for completed orders (addresses that received full payments for their orders) ...
// NULL == not found
// Retrieve:
// 'assigned' - unexpired, with old balances
// 'revalidate' - all
// order results by most recently assigned
$query =
"SELECT * FROM `$btc_addresses_table_name`
WHERE
(
(`status`='assigned' AND (('$current_time' - `assigned_at`) < '$assigned_address_expires_in_secs'))
OR
(`status`='revalidate')
)
AND (('$current_time' - `received_funds_checked_at`) > '$funds_received_value_expires_in_secs')
ORDER BY `assigned_at` DESC;"; // Try to use lower indexes first
$rows_for_balance_check = $wpdb->get_results ($query, ARRAY_A);
if (is_array($rows_for_balance_check))
{
foreach ($rows_for_balance_check as $row_for_balance_check)
{
// Prepare 'address_meta' for use.
$address_meta = BWWC_unserialize_address_meta (@$row_for_balance_check['address_meta']);
$last_order_info = @$address_meta['orders'][0];
$row_id = $row_for_balance_check['id'];
// Retrieve current balance at address.
$balance_info_array = BWWC__getreceivedbyaddress_info ($row_for_balance_check['btc_address'], $confirmations_required, $bwwc_settings['blockchain_api_timeout_secs']);
if ($balance_info_array['result'] == 'success')
{
/*
$balance_info_array = array (
'result' => 'success',
'message' => "",
'host_reply_raw' => "",
'balance' => $funds_received,
);
*/
// Refresh 'received_funds_checked_at' field
$current_time = time();
$query =
"UPDATE `$btc_addresses_table_name`
SET
`total_received_funds` = '{$balance_info_array['balance']}',
`received_funds_checked_at`='$current_time'
WHERE `id`='$row_id';";
$ret_code = $wpdb->query ($query);
if ($balance_info_array['balance'] > 0)
{
if ($row_for_balance_check['status'] == 'revalidate')
{
// Address with suddenly appeared balance. Check if that is matching to previously-placed [likely expired] order
if (!$last_order_info || !@$last_order_info['order_id'] || !@$balance_info_array['balance'] || !@$last_order_info['order_total'])
{
// No proper metadata present. Mark this address as 'xused' (used by unknown entity outside of this application) and be done with it forever.
$query =
"UPDATE `$btc_addresses_table_name`
SET
`status` = 'xused'
WHERE `id`='$row_id';";
$ret_code = $wpdb->query ($query);
continue;
}
else
{
// Metadata for this address is present. Mark this address as 'assigned' and treat it like that further down...
$query =
"UPDATE `$btc_addresses_table_name`
SET
`status` = 'assigned'
WHERE `id`='$row_id';";
$ret_code = $wpdb->query ($query);
}
}
BWWC__log_event (__FILE__, __LINE__, "Cron job: NOTE: Detected non-zero balance at address: '{$row_for_balance_check['btc_address']}, order ID = '{$last_order_info['order_id']}'. Detected balance ='{$balance_info_array['balance']}'.");
if ($balance_info_array['balance'] < $last_order_info['order_total'])
{
BWWC__log_event (__FILE__, __LINE__, "Cron job: NOTE: balance at address: '{$row_for_balance_check['btc_address']}' (BTC '{$balance_info_array['balance']}') is not yet sufficient to complete it's order (order ID = '{$last_order_info['order_id']}'). Total required: '{$last_order_info['order_total']}'. Will wait for more funds to arrive...");
}
}
// Note: to be perfectly safe against late-paid orders, we need to:
// Scan '$address_meta['orders']' for first UNPAID order that is exactly matching amount at address.
if ($balance_info_array['balance'] >= $last_order_info['order_total'])
{
// Process full payment event
/*
$address_meta =
array (
'orders' =>
array (
// All orders placed on this address in reverse chronological order
array (
'order_id' => $order_id,
'order_total' => $order_total_in_btc,
'order_datetime' => date('Y-m-d H:i:s T'),
'requested_by_ip' => @$_SERVER['REMOTE_ADDR'],
),
array (
...
),
),
'other_meta_info' => array (...)
);
*/
// Last order was fully paid! Complete it...
BWWC__log_event (__FILE__, __LINE__, "Cron job: NOTE: Full payment for order ID '{$last_order_info['order_id']}' detected at address: '{$row_for_balance_check['btc_address']}' (BTC '{$balance_info_array['balance']}'). Total was required for this order: '{$last_order_info['order_total']}'. Processing order ...");
// Update order' meta info
$address_meta['orders'][0]['paid'] = true;
// Process and complete the order within WooCommerce (send confirmation emails, etc...)
BWWC__process_payment_completed_for_order ($last_order_info['order_id'], $balance_info_array['balance']);
// Update address' record
$address_meta_serialized = BWWC_serialize_address_meta ($address_meta);
// Update DB - mark address as 'used'.
//
$current_time = time();
// Note: `total_received_funds` and `received_funds_checked_at` are already updated above.
//
$query =
"UPDATE `$btc_addresses_table_name`
SET
`status`='used',
`address_meta`='$address_meta_serialized'
WHERE `id`='$row_id';";
$ret_code = $wpdb->query ($query);
BWWC__log_event (__FILE__, __LINE__, "Cron job: SUCCESS: Order ID '{$last_order_info['order_id']}' successfully completed.");
// Return here to avoid overloading too many processing needs to one random visitor.
// Then it means no more than one order can be processed per 2.5 minutes (or whatever soft cron schedule is).
// Hard cron is immune to this limitation.
if (!$hardcron)
return;
}
}
else
{
BWWC__log_event (__FILE__, __LINE__, "Cron job: Warning: Cannot retrieve balance for address: '{$row_for_balance_check['btc_address']}: " . $balance_info_array['message']);
}
}
}
// Process all 'revalidate' addresses here.
// ...
//-----------------------------------------------------
// Pre-generate new bitcoin address for electrum wallet
// Try to retrieve mpk from copy of settings.
if ($hardcron)
{
$electrum_mpk = @$bwwc_settings['gateway_settings']['electrum_master_public_key'];
if ($electrum_mpk && @$bwwc_settings['gateway_settings']['service_provider'] == 'electrum-wallet')
{
// Calculate number of unused addresses belonging to currently active electrum wallet
$origin_id = 'electrum.mpk.' . md5($electrum_mpk);
$current_time = time();
$funds_received_value_expires_in_secs = $bwwc_settings['funds_received_value_expires_in_mins'] * 60;
$assigned_address_expires_in_secs = $bwwc_settings['assigned_address_expires_in_mins'] * 60;
if ($bwwc_settings['reuse_expired_addresses'])
$reuse_expired_addresses_query_part = "OR (`status`='assigned' AND `total_received_funds`='0' AND (('$current_time' - `assigned_at`) > '$assigned_address_expires_in_secs'))";
else
$reuse_expired_addresses_query_part = "";
// Calculate total number of currently unused addresses in a system. Make sure there aren't too many.
// NULL == not found
// Retrieve:
// 'unused' - with fresh zero balances
// 'assigned' - expired, with fresh zero balances (if 'reuse_expired_addresses' is true)
//
// Hence - any returned address will be clean to use.
$query =
"SELECT COUNT(*) as `total_unused_addresses` FROM `$btc_addresses_table_name`
WHERE `origin_id`='$origin_id'
AND `total_received_funds`='0'
AND (('$current_time' - `received_funds_checked_at`) < '$funds_received_value_expires_in_secs')
AND (`status`='unused' $reuse_expired_addresses_query_part)
";
$total_unused_addresses = $wpdb->get_var ($query);
if ($total_unused_addresses < $bwwc_settings['max_unused_addresses_buffer'])
{
BWWC__generate_new_bitcoin_address_for_electrum_wallet ($bwwc_settings, $electrum_mpk);
}
}
}
//-----------------------------------------------------
}
//===========================================================================