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api_bitstamp.php
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<?php
/* BEGIN BITSTAMP API FUNCTIONS */
function querybitstamp($endpoint,$customerid,$apikey,$apisecret,$data=array()) {
// General purpose Bitstamp API caller: performs a call to the Bitstamp API, with the specified parameters
//$nonce = str_replace('.','',microtime(true));
$nonce = microtime(true)*10000;
$message = $nonce.$customerid.$apikey;
$signature = strtoupper(hash_hmac('sha256',$message,$apisecret));
$query = array(
"key" => $apikey,
"signature" => $signature,
"nonce" => $nonce
);
foreach($data as $key => $value) {
$query[$key] = $value;
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$endpoint);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($query) );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($ch);
curl_close ($ch);
$server_output = json_decode($output,true);
if($server_output['status'] == 'error'){
die("API ERROR: ".print_r($server_output['reason'],true)." (Code: ".$server_output['code'].") - Endpoint: ".$endpoint."\nQuery: ".print_r($query,true));
}
return $output;
}
function getbalance($customerid,$apikey,$apisecret,$currency='') {
// Retrieves the balance data for the specified account
$balance = querybitstamp('https://www.bitstamp.net/api/v2/balance/',$customerid,$apikey,$apisecret);
if(!empty($currency)) {
$balance = json_decode($balance,true);
$balance = $balance[$currency];
}
return $balance;
}
function getransactions($customerid,$apikey,$apisecret,$pair='') {
// Fetch all transactions associated with the specified account
$history = querybitstamp('https://www.bitstamp.net/api/v2/user_transactions/',$customerid,$apikey,$apisecret);
return $history;
}
function savetransactions($history) {
// Saves the FIAT deposits in the database
global $db;
$history = json_decode($history,true);
$deposits = $total = 0;
//$log .= print_r($history,true);
// save deposits in fiat currency
foreach($history as $transaction) {
if(strtotime(INSTALL_DATE) < strtotime($transaction['datetime'])) {
if(($transaction['type'] == 0) && ($transaction[DEPOSITCURRENCY] > 0)) { // FIAT deposit
$log .= "Found deposit of ". $transaction[DEPOSITCURRENCY] . DEPOSITCURRENCY . " on date: ".$transaction['datetime']."\n";
$record = array(
'datetime' => MySQL::SQLValue($transaction['datetime'], MySQL::SQLVALUE_DATETIME ),
'currency' => MySQL::SQLValue(DEPOSITCURRENCY),
'amount' => MySQL::SQLValue($transaction[DEPOSITCURRENCY])
);
$insert = $db->AutoInsertUpdate("deposits", $record, $record);
$totaldeposits = $totaldeposits + $transaction[DEPOSITCURRENCY];
$deposits++;
}
/*
if(($transaction['type'] == 1) && ($transaction['btc'] != 0)) { // BTC withdrawal
$log .= "Found withdrawal of ". -$transaction['btc'] . "btc on date: ".$transaction['datetime']."\n";
}
*/
}
}
$log .= $deposits ." Deposits found, total: ".$totaldeposits.DEPOSITCURRENCY."\n";
return $log;
}
function savecurrentbalance($balance,$account) {
// Save the current FIAT and BTC balance of the specified account to the database
global $db;
$balance = json_decode($balance,true);
// save BTC balance
$record = array(
'updated' => 'CURRENT_TIMESTAMP',
'account' => MySQL::SQLValue($account),
'currency' => MySQL::SQLValue('btc'),
'amount' => MySQL::SQLValue($balance['btc_available'])
);
$update = array(
'account' => MySQL::SQLValue($account),
'currency' => MySQL::SQLValue('btc'),
);
$insert = $db->AutoInsertUpdate("currentbalance", $record, $update);
// if (! $insert) $db->Kill();
// save Fiat balance
$record = array(
'updated' => 'CURRENT_TIMESTAMP',
'account' => MySQL::SQLValue($account),
'currency' => MySQL::SQLValue(DEPOSITCURRENCY),
'amount' => MySQL::SQLValue($balance[DEPOSITCURRENCY.'_available'])
);
$update = array(
'account' => MySQL::SQLValue($account),
'currency' => MySQL::SQLValue(DEPOSITCURRENCY),
);
//var_dump($update);
$insert = $db->AutoInsertUpdate("currentbalance", $record, $update);
// if (! $insert) $db->Kill();
$log .= "There are ".$balance['btc_available']." BTC and ".$balance[DEPOSITCURRENCY.'_available']." ".DEPOSITCURRENCY." on " .$account." account\n";
// Save info about current fees
$record = array(
'fee' => $balance['btcusd_fee'],
'pair' => MySQL::SQLValue('btcusd')
);
$update = array(
'pair' => MySQL::SQLValue('btcusd')
);
$insert = $db->AutoInsertUpdate("fees", $record, $update);
// if (! $insert) $db->Kill();
// Save info about current fees
$record = array(
'fee' => $balance['btceur_fee'],
'pair' => MySQL::SQLValue('btceur')
);
$update = array(
'pair' => MySQL::SQLValue('btceur')
);
$insert = $db->AutoInsertUpdate("fees", $record, $update);
// if (! $insert) $db->Kill();
return $log;
}
function trade($customerid,$apikey,$apisecret,$amount,$id="",$pair=PAIR) {
// Performs an Instant buy order and saves result to the database
global $db;
$data = array('amount' => $amount);
$trade = querybitstamp('https://www.bitstamp.net/api/v2/buy/instant/'.$pair.'/',$customerid,$apikey,$apisecret,$data);
$trade = json_decode($trade,true);
// Calculate fees and purchase value
$filter["pair"] = MySQL::SQLValue(PAIR);
$select = $db->SelectRows("fees", $filter);
if (! $select) $db->Kill();
$db->MoveFirst();
while (! $db->EndOfSeek()) {
$row = $db->Row();
$fee = $row->fee;
$cost = $amount*$fee;
$cost = ceil($cost)/100; // round to upper cent
}
$traded = $amount - $cost;
$bought = $traded/$trade['price'];
$record = array(
'id' => MySQL::SQLValue($id),
'datetime' => 'CURRENT_TIMESTAMP',
'status' => MySQL::SQLValue('executed'),
'amount' => MySQL::SQLValue($traded),
'price' => MySQL::SQLValue($trade['price']),
'pair' => MySQL::SQLValue($pair),
'bought' => MySQL::SQLValue($bought),
'fees' => MySQL::SQLValue($cost),
);
//$insert = $db->InsertRow("trades", $record);
$update = array(
'id' => MySQL::SQLValue($id),
);
$insert = $db->AutoInsertUpdate("trades", $record, $update);
//if (! $insert) $db->Kill();
$log .= "Trade executed: buy ".round($bought,8)." BTC for ".$traded.DEPOSITCURRENCY." (fees: ".$cost.DEPOSITCURRENCY.")\n";
if(EMAIL_NOTIFICATIONS) sendmail("BTC Purchase executed","Bought ".round($bought,8)." BTC for ".$traded.DEPOSITCURRENCY." (fees: ".$cost.DEPOSITCURRENCY.")");
return $log;
}
function transferbalance($amount,$currency,$direction) {
global $db;
switch($direction) {
case 'main2trading': // Transfer FIAT balance from Main account to Sub account
// get main account balance
$balance = getbalance(EXCHANGE_CUSTOMERID,MAINAPI_KEY,MAINAPI_SECRET);
$balance = json_decode($balance,true);
$balance = $balance[$currency.'_available'];
if($amount > $balance) {
$log .= "Error: available FIAT balance is ".$balance.$currency."; cannot transfer ".$amount.$currency." to subaccount";
$subject = "[ACTION NEEDED] Unable to transfer your recent deposit to trading account";
$body = $log;
$log .= sendmail($subject,$body);
return $log;
}
$amount = number_format((float)$amount, 2, '.', '');
$data = array('amount' => $amount,
'currency' => strtoupper(DEPOSITCURRENCY),
'subAccount' => SUBACCOUNTID
);
// perform transfer
$transfer = querybitstamp('https://www.bitstamp.net/api/v2/transfer-from-main/',EXCHANGE_CUSTOMERID,MAINAPI_KEY,MAINAPI_SECRET,$data);
$log .= "Transferred ".$amount.DEPOSITCURRENCY." From main account to trading account\n";
break;
case 'trading2main': // Transfer BTC balance from Trading account to Main account (for withdrawals)
$balance = getbalance(EXCHANGE_CUSTOMERID,TRADINGAPI_KEY,TRADINGAPI_SECRET);
$balance = json_decode($balance,true);
$balance = $balance[$currency.'_available'];
if($amount > $balance) {
$log .= "Error: available BTC balance is ".$balance.$currency."; cannot transfer ".$amount.$currency." to subaccount";
$subject = "[ACTION NEEDED] Unable to transfer your BTC purchases to Main account for withdrawal";
$body = $log;
$log .= sendmail($subject,$body);
return $log;
}
$amount = number_format((float)$amount, 8, '.', '');
$data = array('amount' => $amount,
'currency' => strtoupper($currency),
);
$transfer = querybitstamp('https://www.bitstamp.net/api/v2/transfer-to-main/',EXCHANGE_CUSTOMERID,TRADINGAPI_KEY,TRADINGAPI_SECRET,$data);
$log .= "Transferred ".$amount.$currency." From trading account to main account\n";
break;
}
// Save balances
$balance = getbalance(EXCHANGE_CUSTOMERID,MAINAPI_KEY,MAINAPI_SECRET);
$log .= savecurrentbalance($balance,'main');
$balance = getbalance(EXCHANGE_CUSTOMERID,TRADINGAPI_KEY,TRADINGAPI_SECRET);
$log .= savecurrentbalance($balance,'trading');
return $log;
}
function withdraw($amount="",$currency="btc") {
global $db;
$balance = getbalance(EXCHANGE_CUSTOMERID,TRADINGAPI_KEY,TRADINGAPI_SECRET);
$log .= savecurrentbalance($balance,'trading');
$balances = array();
if($amount == "") {
// Get accounts balances
$filter["account"] = MySQL::SQLValue("trading");
$filter["currency"] = MySQL::SQLValue($currency);
$select = $db->SelectRows("currentbalance", $filter);
if (! $select) $db->Kill();
$db->MoveFirst();
while (! $db->EndOfSeek()) {
$row = $db->Row();
$balances[$row->account] = $row->amount;
}
$amount = $balances['trading'];
} // else $amount = $amount
if($amount >= WITHDRAWMIN) {
//if($balances['trading'] <= WITHDRAWMIN) {
// create a new record for this withdrawal
$record = array(
'datetime' => MySQL::SQLValue(NOW, MySQL::SQLVALUE_DATETIME ),
'currency' => MySQL::SQLValue($currency),
'amount' => MySQL::SQLValue($amount)
);
$insert = $db->AutoInsertUpdate("withdrawals", $record, $record);
$withdrawalid = $db->GetLastInsertID();
// Transfer BTC to Main account
$log .= transferbalance($amount,$currency,'trading2main');
// Update the withdrawal record in database
$update["sent2mainaccount"] = MySQL::SQLValue($amount);
$where = array('id' => $withdrawalid);
if (! $db->UpdateRows("withdrawals", $update,$where)) $db->Kill;
// initiate withdraw
$data = array(
'amount' => $amount ,
'address' => BTCWALLET,
'currency' => strtoupper($currency),
'subAccount' => SUBACCOUNTID
);
// perform withdrawal
$transfer = querybitstamp('https://www.bitstamp.net/api/bitcoin_withdrawal/',EXCHANGE_CUSTOMERID,MAINAPI_KEY,MAINAPI_SECRET,$data);
$transfer = json_decode($transfer);
if(!$transfer->error) {
// Update the withdrawal record in database
$update["exchange_id"] = MySQL::SQLValue($transfer->id);
$where = array('id' => $withdrawalid);
if (! $db->UpdateRows("withdrawals", $update,$where)) $db->Kill;
$log .= "Requested withdrawal of ".$amount.$currency." to wallet ".BTCWALLET."\n";
if(EMAIL_NOTIFICATIONS) sendmail("New withdrawal requested","A withdrawal of ".$amount.$currency." to wallet ".BTCWALLET." has been requested.");
} else {
$log .= print_r($transfer->error,true);
}
/*
} else {
$log .= "Available ".$currency." (".$balances['trading'].") is higher than requested withdraw of ".WITHDRAWMIN.$currency."\n";
}
*/
} else {
$log .= "Available ".$currency." (".$balances['trading'].") is lower than mimimum withdrawable amount of ".WITHDRAWMIN.$currency."\n";
}
// Save balances
$balance = getbalance(EXCHANGE_CUSTOMERID,MAINAPI_KEY,MAINAPI_SECRET);
$log .= savecurrentbalance($balance,'main');
$balance = getbalance(EXCHANGE_CUSTOMERID,TRADINGAPI_KEY,TRADINGAPI_SECRET);
$log .= savecurrentbalance($balance,'trading');
return $log;
}
/* END API FUNCTIONS */
?>