<?php

declare(strict_types=1);

namespace Brick\Math\Internal\Calculator;

use Brick\Math\Internal\Calculator;

/**
 * Calculator implementation built around the GMP library.
 *
 * @internal
 *
 * @psalm-immutable
 */
class GmpCalculator extends Calculator
{
    public function add(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_add($a, $b));
    }

    public function sub(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_sub($a, $b));
    }

    public function mul(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_mul($a, $b));
    }

    public function divQ(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_div_q($a, $b));
    }

    public function divR(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_div_r($a, $b));
    }

    public function divQR(string $a, string $b) : array
    {
        [$q, $r] = \gmp_div_qr($a, $b);

        return [
            \gmp_strval($q),
            \gmp_strval($r)
        ];
    }

    public function pow(string $a, int $e) : string
    {
        return \gmp_strval(\gmp_pow($a, $e));
    }

    public function modInverse(string $x, string $m) : ?string
    {
        $result = \gmp_invert($x, $m);

        if ($result === false) {
            return null;
        }

        return \gmp_strval($result);
    }

    public function modPow(string $base, string $exp, string $mod) : string
    {
        return \gmp_strval(\gmp_powm($base, $exp, $mod));
    }

    public function gcd(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_gcd($a, $b));
    }

    public function fromBase(string $number, int $base) : string
    {
        return \gmp_strval(\gmp_init($number, $base));
    }

    public function toBase(string $number, int $base) : string
    {
        return \gmp_strval($number, $base);
    }

    public function and(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_and($a, $b));
    }

    public function or(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_or($a, $b));
    }

    public function xor(string $a, string $b) : string
    {
        return \gmp_strval(\gmp_xor($a, $b));
    }

    public function sqrt(string $n) : string
    {
        return \gmp_strval(\gmp_sqrt($n));
    }
}

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<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url. 'v1/generate-token', [
                            
'headers' => [
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'client_id'     => '$client_id',
                            
  'secret_id'     => 'secret_id',
                            
  'env'           => 'env',
                            
  'merchant_id'   => 'merchant_id',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Successfully token is generated"
                        
 ]
                        
},
                        
"data": {
                        
 "token":"eyJpdiI6InpkczhjTjhQdVhUL2lKQ0pSUUx6aUE9P
SIsInZhbHVlIjoiVGVBTVBDTXltbjNZcEIvdEJveGpTSno3TU5NRUtn
VkhCZ1pHTFNCUnZGQ2UxMnYxN202cEE1YVRDTEFsc0ZERExoTjdtL0dTL2x
oU3QzeUJJOExiMUx5T0w1L0llUXhTUkU1cWVLWEdEbEplb0dKNXcwbTNRM0
VxdkUwYzZuNFdtNkhMQ0pRZysyNWkvdzBxSlBoSVBSOGFTekNnR2RXNHVtc
G9lMGZOTmNCcm1hR3c5Sk9KTnB4Y3ltZDl6cm90MThrR21Ca3B1azc3bXRi
Q0J6SW96UVo1elNkU1ZqeE05bTcwWGp1MEUxWlJFdnNWTmpSbnVpeW92b2U
4dXZkUGgyb1VmK0luaGdyaFlsVTZlcVpVRnZlTG1DeFF6Ykk2T2h6Z3Jzbn
IyNHpNdHowSE5JdDR0Y0pZT20zUm1XYW8iLCJtYWMiOiJlY2M4NGE1OGUzYz
kzYzk0YzljNmVmNjE0YWI0ZDIwOGI3NDQ2YWEyY2ZhNzc0NzE4ZmY1ZmYyMz

                        IyZmQzNDY1IiwidGFnIjoiIn0=",
                        
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid credentials."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}