[PHP| BTC-E arbitrage bot

[01BTC10]

It is not my work. You can contact MadAlpha

[1713564452]

1713564452

[1713564452]

1713564452

[1713564452]

1713564452

[Timmieman]

I`ve been trying to get this bot to work though it keeps spitting out the same error:

Code:

Warning: file_get_contents(https://btc-e.com/api/2/btc_usd/depth): failed to open stream: Invalid argument in D:\Apps\XAMPP\bot.php on line 118

Public API error: Connection error

My IP is not blacklisted or anything, it still pumps out values.

Does anyone know how this could be fixed?

With best regards,
Tim

[btc-mike]

Did you make any changes? If so, post the code here.

Is your XAMPP setup correctly? Have you used it successfully with any other programs.

[Timmieman]

I did not make any changes as far as i can remember:

Also, if I just enter the link in my URL it puts out the specific data I need, therefore i`m quite confused what the problem might be

This is my complete code:

Code:

<?php

// Trade API settings
$key = 'Deletedddd'; // your API-key
$secret = 'Deleteddddd'; // your Secret-key

// Limits for trading size (BTC)
// Setting the increment too small will have a negative effect on speed
$min_amount = 0.01;
$max_amount = 0.06;
$increment = 0.002;

// Minimum profit in percent
// Must be higher than BTC-E fee * 3 to be profitable
$min_profit = 1.0;

// Margin of price
// Trades will be executed this much higher/lower to make "sure" they go through
// 1.05 = 5 % and so on
$price_margin = 1.05;

// Delay between requests (ms), check with BTC-E how high value they allow
// setting this too high could cause BTC-E to potentially block the bot.
$delay = 300;

// Specify a minimum time between 2 trades (s). Whenever an inbalance between prices exists
// we want to quickly execute the FIRST trade, but let other arbitrage bots (with bigger balances)
// clean up the rest. Otherwise there seems to be big risk for losing trades.
$time_between_trades = 10;
$last_trade_time = 0;

// Required for BTC-E API
$mt = explode(' ', microtime());
$nonce = $mt[1];

// http://pastebin.com/QyjS3U9M
function btce_query($method, array $req = array())
{
	global $key, $secret, $nonce;

	$req['method'] = $method;
	$req['nonce'] = $nonce++;

	// generate the POST data string
	$post_data = http_build_query($req, '', '&');

	$sign = hash_hmac("sha512", $post_data, $secret);

	// generate the extra headers
	$headers = array(
		'Sign: '.$sign,
		'Key: '.$key,
	);

	// our curl handle (initialize if required)
	static $ch = null;
	if (is_null($ch)) {
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; BTC-E PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
	}
	curl_setopt($ch, CURLOPT_URL, 'https://btc-e.com/tapi/');
	curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

	// run the query
	$res = curl_exec($ch);
	if ($res === false)
		exit('Trade API error: Connection error: ' . curl_error($ch));

	$dec = json_decode($res, true);
	if (!$dec)
		exit('Trade API error: Invalid JSON.');

	return $dec;
}

function perform_trade($trade, $show_balance)
{
	global $last_trade_time;

	$last_trade_time = time();

	$reply = btce_query('Trade', $trade);

	if ($reply['success'] != 1)
		exit('Trade error: ' . $reply['error']);

	if ($show_balance)
		print_balance($reply);
}

function print_balance($response = false)
{
	if (!$response)
		$response = btce_query('getInfo');

	$str = "";

	foreach ($response['return']['funds'] as $key => $val)
	{
		if ($val > 0)
		{
			if (strlen($str) > 0)
				$str .= ",";

			$str .= " " . $val . " " . strtoupper($key);
		}
	}

	echo date("H:i:s") . ' Balance:' . $str . "\n";
}

// Fetch order book for a given currency pair
function order_book($pair)
{
	$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

	if ($orders === false)
		exit('Public API error: Connection error.');

	$dec = json_decode($orders);
	if (!$dec)
		echo date("H:i:s") . " ERROR: Unable to fetch order book for " . $pair . ".\n";

	return $dec;
}

// Return how big volume we can get with the given amount
function ask_volume($orders, $amount)
{
	$vol = 0;
	$value = 0;

	for ($i = 0; $i < count($orders->asks) && $value < $amount; $i++)
	{
		$this_value = min($orders->asks[$i][0] * $orders->asks[$i][1], $amount - $value);
		$this_vol = $this_value / $orders->asks[$i][0];

		$value += $this_value;
		$vol += $this_vol;
	}

	return $vol;
}

function bid_volume($orders, $amount)
{
	$vol = 0;
	$value = 0;

	for ($i = 0; $i < count($orders->bids) && $value < $amount; $i++)
	{
		$this_value = min($orders->bids[$i][1], $amount - $value);
		$this_vol = $this_value * $orders->bids[$i][0];

		$value += $this_value;
		$vol += $this_vol;
	}

	return $vol;
}

function best_bid($orders)
{
	return $orders->bids[0][0];
}

function best_ask($orders)
{
	return $orders->asks[0][0];
}

// The main function of the program
function main_loop()
{
	global $min_amount, $max_amount, $increment, $min_profit, $delay, $price_margin, $time_between_trades, $last_trade_time;

	// Print some starting information
	echo "BTC-E Arbitrage Bot v0.1 (CTRL+C to exit)\n";
	echo "Trade amount (min/increment/max): " . $min_amount . " / " . $increment . " / " . $max_amount . "\n";
	echo "Minimum profit: " . $min_profit . " %\n";
	echo "Price margin: " . $price_margin . "\n";
	echo "Delay between checks: " . $delay . " ms\n";
	echo "Min time between trades: " . $time_between_trades . " s\n";

	print_balance();

	// Loop indefinitely (press CTRL+C to exit)
	while (true)
	{
		// Fetch order books for all currency pairs
		$btc_usd_orders = order_book('btc_usd');
		$ltc_btc_orders = order_book('ltc_btc');
		$ltc_usd_orders = order_book('ltc_usd');

		// Proceed if we have orders for all pairs
		if ($btc_usd_orders && $ltc_btc_orders && $ltc_usd_orders)
		{
			$best_case = 0;
			$best_profit = 0;
			$best_amount = 0;
			$best_trades = array();

			// Loop through different order sizes to find the one with most profit
			for ($amt = $min_amount; $amt <= $max_amount; $amt += $increment)
			{
				// Case 1: BTC -> LTC -> USD -> BTC
				$c1_ltc = ask_volume($ltc_btc_orders, $amt);
				$c1_usd = bid_volume($ltc_usd_orders, $c1_ltc);
				$c1_btc = ask_volume($btc_usd_orders, $c1_usd);

				$c1_profit = $c1_btc - $amt;
				$c1_profit_percent = ($c1_profit * 100) / $amt;

				if ($c1_profit > $best_profit && $c1_profit_percent > $min_profit)
				{
					$best_case = 1;
					$best_profit = $c1_profit;
					$best_amount = $amt;
					$best_trades = array
					(
						array('pair' => 'ltc_btc', 'type' => 'buy', 'amount' => round($c1_ltc, 6), 'rate' => round(best_ask($ltc_btc_orders) * $price_margin, 3)),
						array('pair' => 'ltc_usd', 'type' => 'sell', 'amount' => round($c1_ltc, 6), 'rate' => round(best_bid($ltc_usd_orders) / $price_margin, 3)),
						array('pair' => 'btc_usd', 'type' => 'buy', 'amount' => round($c1_btc, 6), 'rate' => round(best_ask($btc_usd_orders) * $price_margin, 3))
					);
				}

				// Case 2: BTC -> USD -> LTC -> BTC
				$c2_usd = bid_volume($btc_usd_orders, $amt);
				$c2_ltc = ask_volume($ltc_usd_orders, $c2_usd);
				$c2_btc = bid_volume($ltc_btc_orders, $c2_ltc);

				$c2_profit = $c2_btc - $amt;
				$c2_profit_percent = ($c2_profit * 100) / $amt;

				if ($c2_profit > $best_profit && $c2_profit_percent > $min_profit)
				{
					$best_case = 2;
					$best_profit = $c2_profit;
					$best_amount = $amt;
					$best_trades = array
					(
						array('pair' => 'btc_usd', 'type' => 'sell', 'amount' => round($amt, 6), 'rate' => round(best_bid($btc_usd_orders) / $price_margin, 3)),
						array('pair' => 'ltc_usd', 'type' => 'buy', 'amount' => round($c2_ltc, 6), 'rate' => round(best_ask($ltc_usd_orders) * $price_margin, 3)),
						array('pair' => 'ltc_btc', 'type' => 'sell', 'amount' => round($c2_ltc, 6), 'rate' => round(best_bid($ltc_btc_orders) / $price_margin, 3))
					);
				}
			}

			// Execute the trades if we found one
			if ($best_case > 0)
			{
				echo date("H:i:s") . ($best_case == 1 ? " LTC -> USD" : " USD -> LTC") . ", Amount " . $best_amount .
					", Expected Profit " . number_format($best_profit, 4) .
					" (" . number_format(($best_profit * 100) / $best_amount, 2) . " %)\n";

				// Check that enough time has passed from the last trade
				if ((time() - $last_trade_time) < $time_between_trades)
				{
					echo date("H:i:s") . " Rejected (not enough time passed from last trade.\n";
				}
				else
				{
					perform_trade($best_trades[0], false);
					perform_trade($best_trades[1], false);
					perform_trade($best_trades[2], true);
				}
			}
		}

		// Sleep for a bit
		usleep($delay * 1000);
	}
}

// Execute the main loop function
main_loop();

[btc-mike]

Code looks like mine.

I think your XAMPP is screwed up. I asked you about it before. Getting the order books is the simple part of accessing BTC-e. Since the bot is tripping up on that, there is probably an issue with your configs.

[Timmieman]

I enabled curl in php.ini of XAMPP.

Is theresomething else I should configure?

Thanks in advance

[btc-mike]

Pulling the order books doesn't require curl. Curl is used later in the program.

I don't know anything about XAMPP setup.

[Timmieman]

Could anyone explain me the proper settings for either XAMP or WAMP?

Thanks in advance

It seems to be working now, though it the php explorer it still states

Code:

Fatal error: Maximum execution time of 30 seconds exceeded in D:\Apps\Wamp\www\bot_mad_livekey.php on line 122

# Time Memory Function Location 
1 0.0007 307720 {main}( ) ..\bot_mad_livekey.php:0 
2 0.0007 310592 main_loop( ) ..\bot_mad_livekey.php:283 
3 29.8922 822544 order_book( ) ..\bot_mad_livekey.php:199 

Which is:

Code:

$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

So it probably stalls on getting the order_book as stated before

Maybe this extra information helps somebody to find the solution?

I`ll put up a bounty of 0.01BTC for the one that is able to fix it

[theblazehen]

Could anyone explain me the proper settings for either XAMP or WAMP?

Thanks in advance

It seems to be working now, though it the php explorer it still states

Code:

Fatal error: Maximum execution time of 30 seconds exceeded in D:\Apps\Wamp\www\bot_mad_livekey.php on line 122

# Time Memory Function Location 
1 0.0007 307720 {main}( ) ..\bot_mad_livekey.php:0 
2 0.0007 310592 main_loop( ) ..\bot_mad_livekey.php:283 
3 29.8922 822544 order_book( ) ..\bot_mad_livekey.php:199 

Which is:

Code:

$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

So it probably stalls on getting the order_book as stated before

Maybe this extra information helps somebody to find the solution?

I`ll put up a bounty of 0.01BTC for the one that is able to fix it

Are you running it from the command line? It appears that php is limiting the execution time

[Voodah]

Hey btc-mike

Are you still running this bot?

Has it worked for you?

[gabbello]

I'm running the bot with the following settings, but no transactions appear to happen in over 12h (there is also no other message in the console). Is this normal?

BTC-E Arbitrage Bot v0.1 (CTRL+C to exit)
Trade amount (min/increment/max): 0.001 / 0.0002 / 0.006
Minimum profit: 1 %
Price margin: 1.05
Delay between checks: 1000 ms
Min time between trades: 10 s
10:42:03 Balance: 62.9649178 USD, 0.0463 BTC, 1.996 LTC

[gabbello]

Ok, I managed to make it work but (at least with the current settings) the algorithm seems to lose money .

Example of a set of transactions:

LTC/BTC   sell   2.0563 LTC   0.029 BTC   0.0596327 BTC   25.12.13 15:47
LTC/USD   buy   2.0563 LTC   19 USD   39.0697 USD   25.12.13 15:47
BTC/USD   sell   0.059 BTC   652.126 USD   38.475434 USD   25.12.13 15:47


So basically at the end of the transactions i'm:

BTC: + 0.0006326
LTC: 0
USD: - 0.594266


Since 0.0006326 BTC in USD (at the rate of 652.126) is just -0.4126001202 I lost ~0.2 USD

What am I mising?

[btc-mike]

I haven't used it in months but it did work for me.

I have been using the new code released by miaviator.

Timmieman got this one running but also moved on to the new code.

[Voodah]

I haven't used it in months but it did work for me.

I have been using the new code released by miaviator.

Timmieman got this one running but also moved on to the new code.

Nice. Thanks!

[luicon]

where is the new code?

[btc-mike]

where is the new code?

https://bitcointalk.org/index.php?topic=366546.0

[JasperDX7]

Could anyone explain me the proper settings for either XAMP or WAMP?

Thanks in advance

It seems to be working now, though it the php explorer it still states

Code:

Fatal error: Maximum execution time of 30 seconds exceeded in D:\Apps\Wamp\www\bot_mad_livekey.php on line 122

# Time Memory Function Location 
1 0.0007 307720 {main}( ) ..\bot_mad_livekey.php:0 
2 0.0007 310592 main_loop( ) ..\bot_mad_livekey.php:283 
3 29.8922 822544 order_book( ) ..\bot_mad_livekey.php:199 

Which is:

Code:

$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

So it probably stalls on getting the order_book as stated before

Maybe this extra information helps somebody to find the solution?

I`ll put up a bounty of 0.01BTC for the one that is able to fix it

php has a default execution time. Try putting this at the top of the script

ini_set('max_execution_time', 0);

[ezvhee]

does anyone have a made a good result for this bot?

[wing_hk]

I have no idea about this error

Code:

PHP Warning:  file_get_contents(https://btc-e.com/api/2/ltc_usd/depth): failed to open stream:
HTTP request failed! HTTP/1.1 520 Origin Error

It come from this line

Code:

$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

I am running it with "php xxxx.php" in a linux server. Does it mean my location is restricted for API?

[btc-mike]

I have no idea about this error

Code:

PHP Warning:  file_get_contents(https://btc-e.com/api/2/ltc_usd/depth): failed to open stream:
HTTP request failed! HTTP/1.1 520 Origin Error

It come from this line

Code:

$orders = file_get_contents('https://btc-e.com/api/2/' . $pair . '/depth');

I am running it with "php xxxx.php" in a linux server. Does it mean my location is restricted for API?

Does PHP have access to internet?