From 8d77aebb6408d6cb2e996f1cf97ef1eb8a4abee6 Mon Sep 17 00:00:00 2001
From: mahdi msr <mahdi.msr4@gmail.com>
Date: Mon, 29 Sep 2025 00:16:31 +0330
Subject: [PATCH] future-private: FIX signature for case empty body and have
 only query param

---
 src/Requests/Header.php | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/Requests/Header.php b/src/Requests/Header.php
index 2192635..d1fb011 100644
--- a/src/Requests/Header.php
+++ b/src/Requests/Header.php
@@ -21,6 +21,7 @@ class Header
     /**
      * Convert sorted parameters to string format
      * Example: ["id" => "1", "uid" => "200"] becomes "id1uid200"
+     * According to Bitunix documentation: String queryParams = "id1uid200"
      */
     public static function digestQueryParameters(array $parameters): string
     {
@@ -32,7 +33,7 @@ class Header
         $result = '';
 
         foreach ($sortedParameters as $key => $value) {
-            $result .= $key.$value;
+            $result .= $key . $value;
         }
 
         return $result;
@@ -78,8 +79,12 @@ class Header
         // Step 2: Remove all spaces from body (already done if JSON encoded properly)
         $bodyString = trim($body);
 
-        // Step 3: Create digest: SHA256(nonce + timestamp + api-key + queryParams + body)
-        $digestInput = $nonce.$timestamp.$apiKey.$queryParamsString.$bodyString;
+        // Step 3: Create digest: SHA256(nonce + timestamp + api-key + queryParams + body (if not empty))
+        if (strlen($bodyString) == 0) {
+            $digestInput = $nonce.$timestamp.$apiKey.$queryParamsString;
+        }else{
+            $digestInput = $nonce.$timestamp.$apiKey.$queryParamsString.$bodyString;
+        }
         $digest = hash('sha256', $digestInput);
 
         // Step 4: Create sign: SHA256(digest + secretKey)