future-public: add set leverage request

.gitignore

@@ -30,3 +30,4 @@ phpstan.neon
 testbench.yaml
 /docs
 /coverage
+.env

config/bitunix-api.php

@@ -1,7 +1,9 @@
 <?php
 
-// config for Msr/LaravelBitunixApi
 return [
 
     'future_base_uri' => 'https://fapi.bitunix.com/',
+    'api_key' => env('BITUNIX_API_KEY'),
+    'api_secret' => env('BITUNIX_API_SECRET'),
+    'language' => 'en-US',
 ];

examples/ChangeLeverageExample.php

@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * Example usage of Change Leverage functionality
+ * 
+ * This example demonstrates how to use the LaravelBitunixApi package
+ * to change leverage for a trading pair on Bitunix exchange.
+ */
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use Msr\LaravelBitunixApi\Requests\ChangeLeverageRequestContract;
+
+// Example configuration (in real usage, these would be in your .env file)
+config([
+    'bitunix-api.future_base_uri' => 'https://fapi.bitunix.com/',
+    'bitunix-api.api_key' => 'your-api-key-here',
+    'bitunix-api.api_secret' => 'your-api-secret-here',
+    'bitunix-api.language' => 'en-US',
+]);
+
+try {
+    // Get the API instance
+    $api = app(ChangeLeverageRequestContract::class);
+    
+    // Change leverage for BTCUSDT pair
+    $symbol = 'BTCUSDT';
+    $marginCoin = 'USDT';
+    $leverage = 12;
+    
+    echo "Changing leverage for {$symbol} to {$leverage}x...\n";
+    
+    $response = $api->changeLeverage($symbol, $marginCoin, $leverage);
+    
+    // Check response status
+    if ($response->getStatusCode() === 200) {
+        $data = json_decode($response->getBody()->getContents(), true);
+        
+        if ($data['code'] === 0) {
+            echo "✅ Leverage changed successfully!\n";
+            echo "Symbol: " . $data['data'][0]['symbol'] . "\n";
+            echo "Margin Coin: " . $data['data'][0]['marginCoin'] . "\n";
+            echo "New Leverage: " . $data['data'][0]['leverage'] . "\n";
+        } else {
+            echo "❌ API Error: " . $data['msg'] . "\n";
+        }
+    } else {
+        echo "❌ HTTP Error: " . $response->getStatusCode() . "\n";
+    }
+    
+} catch (Exception $e) {
+    echo "❌ Exception: " . $e->getMessage() . "\n";
+}
+
+/**
+ * Environment Variables Required:
+ * 
+ * BITUNIX_API_KEY=your-api-key
+ * BITUNIX_API_SECRET=your-api-secret
+ * BITUNIX_LANGUAGE=en-US
+ */

src/LaravelBitunixApi.php

@@ -4,9 +4,11 @@ namespace Msr\LaravelBitunixApi;
 
 use GuzzleHttp\Client;
 use Msr\LaravelBitunixApi\Requests\FutureKLineRequestContract;
+use Msr\LaravelBitunixApi\Requests\ChangeLeverageRequestContract;
+use Msr\LaravelBitunixApi\Requests\Header;
 use Psr\Http\Message\ResponseInterface;
 
-class LaravelBitunixApi implements FutureKLineRequestContract
+class LaravelBitunixApi implements FutureKLineRequestContract, ChangeLeverageRequestContract
 {
     private Client $publicFutureClient;
 
@@ -17,6 +19,17 @@ class LaravelBitunixApi implements FutureKLineRequestContract
         ]);
     }
 
+    protected function getPrivateFutureClient(array $queryParams = [], array $body = []): Client
+    {
+        $bodyString = json_encode($body);
+        $headers = Header::generateHeaders($queryParams, $bodyString);
+
+        return new Client([
+            'base_uri' => config('bitunix-api.future_base_uri').'/api/v1/futures/',
+            'headers' => $headers,
+        ]);
+    }
+
     public function getFutureKline(string $symbol, string $interval, int $limit = 100, ?int $startTime = null, ?int $endTime = null, string $type = 'LAST_PRICE'): ResponseInterface
     {
         $response = $this->publicFutureClient->get('kline', [
@@ -32,4 +45,19 @@ class LaravelBitunixApi implements FutureKLineRequestContract
 
         return $response;
     }
+
+    public function changeLeverage(string $symbol, string $marginCoin, int $leverage): ResponseInterface
+    {
+        $body = [
+            'symbol' => $symbol,
+            'marginCoin' => $marginCoin,
+            'leverage' => $leverage,
+        ];
+
+        $response = $this->getPrivateFutureClient([], $body)->post('account/change_leverage', [
+            'json' => $body,
+        ]);
+
+        return $response;
+    }
 }

src/LaravelBitunixApiServiceProvider.php

@@ -3,6 +3,7 @@
 namespace Msr\LaravelBitunixApi;
 
 use Msr\LaravelBitunixApi\Commands\LaravelBitunixApiCommand;
+use Msr\LaravelBitunixApi\Requests\ChangeLeverageRequestContract;
 use Msr\LaravelBitunixApi\Requests\FutureKLineRequestContract;
 use Spatie\LaravelPackageTools\Package;
 use Spatie\LaravelPackageTools\PackageServiceProvider;
@@ -29,5 +30,6 @@ class LaravelBitunixApiServiceProvider extends PackageServiceProvider
         parent::packageRegistered();
 
         $this->app->bind(FutureKLineRequestContract::class, LaravelBitunixApi::class);
+        $this->app->bind(ChangeLeverageRequestContract::class, LaravelBitunixApi::class);
     }
 }

src/Requests/ChangeLeverageRequestContract.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Msr\LaravelBitunixApi\Requests;
+
+use Psr\Http\Message\ResponseInterface;
+
+interface ChangeLeverageRequestContract
+{
+    /**
+     * Change leverage for a trading pair
+     *
+     * @param string $symbol Trading pair (e.g., 'BTCUSDT')
+     * @param string $marginCoin Margin coin (e.g., 'USDT')
+     * @param int $leverage Leverage value
+     * @return ResponseInterface
+     */
+    public function changeLeverage(string $symbol, string $marginCoin, int $leverage): ResponseInterface;
+}
+

src/Requests/Header.php

@@ -4,47 +4,126 @@ namespace Msr\LaravelBitunixApi\Requests;
 
 class Header
 {
-    public static function sortQueryParameters(array $parameters): ?array
+    /**
+     * Sort query parameters in ascending ASCII order by Key
+     * 
+     * @param array $parameters
+     * @return array
+     */
+    public static function sortQueryParameters(array $parameters): array
     {
-        $sortableParameters = $parameters;
+        if (empty($parameters)) {
-
-        if (!count($sortableParameters)) {
             return [];
         }
 
-        ksort($sortableParameters, SORT_LOCALE_STRING);
+        ksort($parameters, SORT_STRING);
-        return $sortableParameters;
+        return $parameters;
     }
 
-    public static function digestQueryParameters(array $parameters): ?string
+    /**
+     * Convert sorted parameters to string format
+     * Example: ["id" => "1", "uid" => "200"] becomes "id1uid200"
+     * 
+     * @param array $parameters
+     * @return string
+     */
+    public static function digestQueryParameters(array $parameters): string
     {
-        if (!count($parameters)) {
+        if (empty($parameters)) {
-            return null;
+            return '';
         }
 
         $sortedParameters = self::sortQueryParameters($parameters);
-        return implode('', array_map(
+        $result = '';
-            fn($k, $v) => $k . $v,
+        
-            array_keys($sortedParameters),
+        foreach ($sortedParameters as $key => $value) {
-            array_values($sortedParameters)
+            $result .= $key . $value;
-        ));
+        }
+        
+        return $result;
     }
 
-    public static function generateNonce(): ?string
+    /**
+     * Generate a random 32-bit nonce string
+     * 
+     * @return string
+     */
+    public static function generateNonce(): string
     {
-        return md5(uniqid(mt_rand(), true));
+        return bin2hex(random_bytes(16)); // 32 characters
     }
 
-    public static function generateSignValue(array $queryParams = [], string $body = '', string $randomNonce = ''): string
+    /**
+     * Generate current timestamp in milliseconds
+     * 
+     * @return string
+     */
+    public static function generateTimestamp(): string
+    {
+        return (string) round(microtime(true) * 1000);
+    }
+
+    /**
+     * Generate signature according to Bitunix API documentation
+     * 
+     * Steps:
+     * 1. Sort all queryParams in ascending ASCII order by Key
+     * 2. Remove all spaces from body string
+     * 3. Create digest: SHA256(nonce + timestamp + api-key + queryParams + body)
+     * 4. Create sign: SHA256(digest + secretKey)
+     * 
+     * @param array $queryParams
+     * @param string $body
+     * @param string $nonce
+     * @param string $timestamp
+     * @return string
+     */
+    public static function generateSignValue(array $queryParams = [], string $body = '', string $nonce = '', string $timestamp = ''): string
     {
         $apiKey = config('bitunix-api.api_key');
         $apiSecret = config('bitunix-api.api_secret');
-        $timeStamp = (string)round(microtime(true) * 1000);
-        $digestedQueryParam = self::digestQueryParameters($queryParams);
         
-        $digestedHeader = $randomNonce . $timeStamp . $apiKey . $digestedQueryParam . $body;
+        if (empty($apiKey) || empty($apiSecret)) {
-        $hash = hash('sha256', $digestedHeader);
+            throw new \InvalidArgumentException('API key and secret must be configured');
-        $sign = $hash . $apiSecret;
+        }
-        return hash('sha256', $sign);
+
+        // Step 1: Sort query parameters in ascending ASCII order
+        $queryParamsString = self::digestQueryParameters($queryParams);
+        
+        // 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;
+        $digest = hash('sha256', $digestInput);
+        
+        // Step 4: Create sign: SHA256(digest + secretKey)
+        $signInput = $digest . $apiSecret;
+        $sign = hash('sha256', $signInput);
+        
+        return $sign;
+    }
+
+    /**
+     * Generate complete headers for authenticated requests
+     * 
+     * @param array $queryParams
+     * @param string $body
+     * @return array
+     */
+    public static function generateHeaders(array $queryParams = [], string $body = ''): array
+    {
+        $nonce = self::generateNonce();
+        $timestamp = self::generateTimestamp();
+        $sign = self::generateSignValue($queryParams, $body, $nonce, $timestamp);
+        
+        return [
+            'api-key' => config('bitunix-api.api_key'),
+            'sign' => $sign,
+            'nonce' => $nonce,
+            'timestamp' => $timestamp,
+            'language' => config('bitunix-api.language', 'en-US'),
+            'Content-Type' => 'application/json',
+        ];
     }
 }

tests/ChangeLeverageTest.php

@@ -0,0 +1,25 @@
+<?php
+
+use Msr\LaravelBitunixApi\Requests\ChangeLeverageRequestContract;
+use GuzzleHttp\Client;
+use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Psr7\Response;
+
+it('can change leverage successfully', function () {
+    $api = app(ChangeLeverageRequestContract::class);
+    // This test will make a real API call if credentials are valid
+    // For testing purposes, we'll just verify the method exists and can be called
+    expect(fn() => $api->changeLeverage('BTCUSDT', 'USDT', 12))
+        ->not->toThrow(Exception::class);
+});
+
+it('validates required parameters for change leverage', function () {
+    $api = app(ChangeLeverageRequestContract::class);
+
+    expect(fn() => $api->changeLeverage('BTCUSDT', 'USDT', 10))
+        ->not->toThrow(Exception::class)
+        ->and(fn() => $api->changeLeverage('BTCUSDT', 'USDT', 0))
+        ->not->toThrow(Exception::class);
+});
+

tests/HeaderTest.php

@@ -0,0 +1,135 @@
+<?php
+
+use Msr\LaravelBitunixApi\Requests\Header;
+
+beforeEach(function () {
+    config([
+        'bitunix-api.api_key' => 'test-api-key',
+        'bitunix-api.api_secret' => 'test-secret-key',
+        'bitunix-api.language' => 'en-US',
+    ]);
+});
+
+it('can sort query parameters in ascending ASCII order', function () {
+    $parameters = [
+        'uid' => '200',
+        'id' => '1',
+        'name' => 'test'
+    ];
+    
+    $sorted = Header::sortQueryParameters($parameters);
+    
+    expect(array_keys($sorted))->toBe(['id', 'name', 'uid']);
+    expect($sorted)->toBe([
+        'id' => '1',
+        'name' => 'test',
+        'uid' => '200'
+    ]);
+});
+
+it('can digest query parameters to string format', function () {
+    $parameters = [
+        'id' => '1',
+        'uid' => '200'
+    ];
+    
+    $result = Header::digestQueryParameters($parameters);
+    
+    expect($result)->toBe('id1uid200');
+});
+
+it('can generate a valid nonce', function () {
+    $nonce = Header::generateNonce();
+    
+    expect($nonce)
+        ->toBeString()
+        ->toHaveLength(32)
+        ->toMatch('/^[a-f0-9]+$/');
+});
+
+it('can generate timestamp in milliseconds', function () {
+    $timestamp = Header::generateTimestamp();
+    
+    expect($timestamp)
+        ->toBeString()
+        ->toMatch('/^\d{13}$/'); // 13 digits for milliseconds
+});
+
+it('can generate signature according to Bitunix documentation', function () {
+    $nonce = '123456';
+    $timestamp = '20241120123045';
+    $queryParams = ['id' => '1', 'uid' => '200'];
+    $body = '{"uid":"2899","arr":[{"id":1,"name":"maple"},{"id":2,"name":"lily"}]}';
+    
+    $sign = Header::generateSignValue($queryParams, $body, $nonce, $timestamp);
+    
+    expect($sign)
+        ->toBeString()
+        ->toHaveLength(64) // SHA256 hex length
+        ->toMatch('/^[a-f0-9]+$/');
+});
+
+it('can generate complete headers for authenticated requests', function () {
+    $queryParams = ['symbol' => 'BTCUSDT'];
+    $body = '{"symbol":"BTCUSDT","marginCoin":"USDT","leverage":12}';
+    
+    $headers = Header::generateHeaders($queryParams, $body);
+    
+    expect($headers)
+        ->toHaveKeys(['api-key', 'sign', 'nonce', 'timestamp', 'language', 'Content-Type'])
+        ->and($headers['api-key'])->toBe('test-api-key')
+        ->and($headers['sign'])->toBeString()
+        ->and($headers['nonce'])->toBeString()
+        ->and($headers['timestamp'])->toBeString()
+        ->and($headers['language'])->toBe('en-US')
+        ->and($headers['Content-Type'])->toBe('application/json');
+});
+
+it('throws exception when API credentials are missing', function () {
+    config([
+        'bitunix-api.api_key' => '',
+        'bitunix-api.api_secret' => '',
+    ]);
+    
+    expect(fn() => Header::generateSignValue([], '', 'nonce', 'timestamp'))
+        ->toThrow(InvalidArgumentException::class, 'API key and secret must be configured');
+});
+
+it('handles empty query parameters correctly', function () {
+    $result = Header::digestQueryParameters([]);
+    
+    expect($result)->toBe('');
+});
+
+it('handles empty body correctly', function () {
+    $nonce = '123456';
+    $timestamp = '20241120123045';
+    
+    $sign = Header::generateSignValue([], '', $nonce, $timestamp);
+    
+    expect($sign)
+        ->toBeString()
+        ->toHaveLength(64);
+});
+
+it('generates consistent signature for same inputs', function () {
+    $nonce = '123456';
+    $timestamp = '20241120123045';
+    $queryParams = ['id' => '1'];
+    $body = '{"test":"value"}';
+    
+    $sign1 = Header::generateSignValue($queryParams, $body, $nonce, $timestamp);
+    $sign2 = Header::generateSignValue($queryParams, $body, $nonce, $timestamp);
+    
+    expect($sign1)->toBe($sign2);
+});
+
+it('generates different signatures for different inputs', function () {
+    $nonce = '123456';
+    $timestamp = '20241120123045';
+    
+    $sign1 = Header::generateSignValue(['id' => '1'], '{"test":"value1"}', $nonce, $timestamp);
+    $sign2 = Header::generateSignValue(['id' => '2'], '{"test":"value2"}', $nonce, $timestamp);
+    
+    expect($sign1)->not->toBe($sign2);
+});