public function saveCoin(){
$postData = [];
parse_str($_POST[‘formdata’], $postData);
if(isset($_SESSION[‘paydata’])){
$_SESSION[‘paydata’][‘network’] = $postData[‘network’];
$_SESSION[‘paydata’][‘activeCoin’] = $_POST[‘activeCoin’];
$_SESSION[‘paydata’][‘activeCoinVal’] =$_POST[‘activeCoinVal’];

      $data = $_SESSION['paydata'];
      // $productId = "aa9b739d-c11f-4c72-87ef-f80902281593";
      // if(!$productId){
          // print_r($_POST);
          $result = $this->createProduct();
          if($result){
              $jsondata = json_decode($result, true);
              $productId = $jsondata['id'];
              if(!$productId){
                  return $this->response->setJSON(['status'=>0,'message'=>'Something Went Wrong']);
              }
          }
          else{
              return $this->response->setJSON(['status'=>0,'message'=>'Something Went Wrong']);
          }
      // }
      
      $network = $data['network'];
      $activeCoinVal = $data['activeCoinVal'];
      $activeCoin = $data['activeCoin'];
      $checkoutSession = [
          "lineItems" => [
              [
                  "productId" => $productId,
                  "itemData" => [
                      "name" => "3cross_ai",
                      "price" => $activeCoinVal,
                      "currency" => $activeCoin
                  ]
              ]
          ],
          "currency" => $activeCoin,
          "gateway" => [
              "managed" => [
                  "methods" => [
                      [
                          "network" => $network
                      ]
                  ]
              ]
          ],
          "successUrl" => 'https://dev.tribital.com/cross_ai/public/webhook',
          // "metadata" => [],
          // "expiresAt" => 0,
          "customizations"=> [
              "leftPanelColor"=> "#FFFFFF",
              "primaryButtonColor"=> "#000000",
          ],
      ];

      $curl = curl_init();
      curl_setopt_array($curl, [
          CURLOPT_URL => "https://api.radom.com/checkout_session",
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_ENCODING => "",
          CURLOPT_MAXREDIRS => 10,
          CURLOPT_TIMEOUT => 30,
          CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
          CURLOPT_CUSTOMREQUEST => "POST",
          CURLOPT_POSTFIELDS => json_encode($checkoutSession),
          CURLOPT_HTTPHEADER => [
              "Authorization: eyJhZGRyZXNzIjpudWxsLCJvcmdhbml6YXRpb25faWQiOiJhNTdmNWUwZS1lNTUxLTRhMmMtOTI4OC03YTcwZjMyZTg4NjQiLCJzZXNzaW9uX2lkIjoiMzY2MmU5Y2EtZWFiZC00YTY3LWJiMzUtNDEyYTc1ODVlZTExIiwiZXhwaXJlZF9hdCI6IjIwMjUtMDUtMjdUMDk6NTg6MDEuMzkwMDkzODY2WiIsImlzX2FwaV90b2tlbiI6dHJ1ZX0=",
              "Content-Type: application/json"
          ],
      ]);
                  
      $response = curl_exec($curl);
      $err = curl_error($curl);
      curl_close($curl);
      if ($err) {
          return $this->response->setJSON(['status'=>0,'message'=>'Something Went Wrong']);
      } else {
          $_SESSION['checkoutData'] = json_decode($response);
          if(!$_SESSION['checkoutData']){
              return $this->response->setJSON(['status'=>0,'message'=>'No Data Found']);
          }
          return $this->response->setJSON(['status'=>1,'message'=>'Data saved Successfully','next'=>base_url('send_payment')]);
      }
  }
  else{
      return $this->response->setJSON(['status'=>0,'message'=>'No Data Found']);
  }
}

public function createProduct(){
  $data = $_SESSION['paydata'];
  // print_r($data);die;
  $checkoutSession = [
      "name" => "3cross_ai",
      "description" => "",
      "addOns" => [],
      "currency" => $data['activeCoin'],
      "price" => $data['activeCoinVal']
  ];
  $curl = curl_init();
  curl_setopt_array($curl, [
      CURLOPT_URL => "https://api.radom.com/product/create",
      CURLOPT_RETURNTRANSFER => true,
      CURLOPT_ENCODING => "",
      CURLOPT_MAXREDIRS => 10,
      CURLOPT_TIMEOUT => 30,
      CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
      CURLOPT_CUSTOMREQUEST => "POST",
      CURLOPT_POSTFIELDS => json_encode($checkoutSession),
      CURLOPT_HTTPHEADER => [
          "Authorization: eyJhZGRyZXNzIjpudWxsLCJvcmdhbml6YXRpb25faWQiOiJhNTdmNWUwZS1lNTUxLTRhMmMtOTI4OC03YTcwZjMyZTg4NjQiLCJzZXNzaW9uX2lkIjoiMzY2MmU5Y2EtZWFiZC00YTY3LWJiMzUtNDEyYTc1ODVlZTExIiwiZXhwaXJlZF9hdCI6IjIwMjUtMDUtMjdUMDk6NTg6MDEuMzkwMDkzODY2WiIsImlzX2FwaV90b2tlbiI6dHJ1ZX0=",
          "Content-Type: application/json"
      ],
  ]);

  $response = curl_exec($curl);
  $err = curl_error($curl);
  curl_close($curl);
  if ($err) {
      return "Error" . $err;
  } else {
      return $response;
  }

}

in upper code i send network as any for example Ethereum
and select one of them value as USDT
but it automatically take ETH Main val of its