The signature to create the order has been wrong

API
,
1

Build the content#

String payload = timestamp + “\n” + nonce + “\n” + body + “\n”;

Sign the content#

String signature = hex(hmac(“sha512”, payload, secretKey)).toUpperCase()

My question, I plan to use php to create an order, but the signature keeps prompting an error.

{“status”:“FAIL”,“code”:“400002”,“errorMessage”:“Signature for this request is not valid.”}

// Generate nonce string
$chars = ‘abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ’;
$nonce = ‘’;
for($i=1; $i <= 32; $i++)
{
$pos = mt_rand(0, strlen($chars) - 1);
$char = $chars[$pos];
$nonce .= $char;
}
$ch = curl_init();
$timestamp = round(microtime(true) * 1000);
// Request body
$request = array(
“merchantTradeNo” => “12485634875fJhdd56”,
“totalFee” => 15,
“productDetail” => “productDetail”,
“currency” => “BUSD”,
“returnUrl” => “”,
“tradeType” => “WEB”,
“productType” => “productType”,
“productName” => “ProductName”
);
$json_request = json_encode($request);
$payload = $timestamp."\n".$nonce."\n".$json_request."\n";
$signature = strtoupper(hash_hmac(‘SHA512’,$payload,$binance_pay_secret));
$headers = array();
$headers = “Content-Type: application/json”;
$headers = “BinancePay-Timestamp: $timestamp”;
$headers = “BinancePay-Nonce: $nonce”;
$headers = “BinancePay-Certificate-SN: $binance_pay”;
$headers = “BinancePay-Signature: $signature”;

curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_URL, “https://bpay.binanceapi.com/binancepay/openapi/order”);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);

$result = curl_exec($ch);
if (curl_errno($ch)) { echo ‘Error:’ . curl_error($ch); }
curl_close ($ch);

6

Thanks for your feedback, we will look into it.

10

how did you solved this?

13

@dino How did u solve it? pleaseeee

7

how did you solve the issue?
I am facing the signature mismatch issue,

<?php 
require_once 'config.php';
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$nonce = '';
for($i=1; $i <= 32; $i++)
{
	$pos = mt_rand(0, strlen($chars) - 1);
	$char = $chars[$pos];
	$nonce .= $char;
}
$ch = curl_init();
$timestamp = round(microtime(true) * 1000);
// Request body
$request = array(
	"merchantTradeNo" => "12485634875fJhdd56",
	"totalFee" => 15,
	"productDetail" => "productDetail",
	"currency" => "BUSD",
	"returnUrl" => "",
	"tradeType" => "WEB",
	"productType" => "productType",
	"productName" => "ProductName"
);

$json_request = json_encode($request);
$payload = $timestamp."\n".$nonce."\n".$json_request."\n"; 
$signature = strtoupper(hash_hmac('SHA512',$payload,$your_secret));

$headers = array();
$headers[] = "Content-Type: application/json";
$headers[] = "BinancePay-Timestamp: $timestamp";
$headers[] = "BinancePay-Nonce: $nonce";
$headers[] = "BinancePay-Certificate-SN: $your_key";
$headers[] = "BinancePay-Signature: $signature";
 
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_URL, "https://bpay.binanceapi.com/binancepay/openapi/order");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);

$result = curl_exec($ch); 
if (curl_errno($ch)) { echo 'Error:' . curl_error($ch); }

curl_close ($ch);
8

Exactly same issue did you solved it ?

12

did u solve it?

9

i have the same issue, how did you solved it?

11

Did anyone solved this problem? Im having signature invalid error please help

14

Have you tried this PHP signature example?

15

Hi @dino, you are suggesting source code which is outdated today January 2024.

Do you have sample source codes in different languages for the latest version of Binance Pay API v3?