C2A оплата Google Pay™ (Server - Server)

{
    "apiVersion": 2,
    "apiVersionMinor": 0,
    "allowedPaymentMethods": [
        {
            "type": "CARD",
            "parameters": {
                "allowedAuthMethods": ["PAN_ONLY", "CRYPTOGRAM_3DS"],
                "allowedCardNetworks": ["VISA", "MASTERCARD"]
            },
            "tokenizationSpecification": {
                "type": "PAYMENT_GATEWAY",
                "parameters": {
                    "gateway": "platon", //фіксований ідентифікатор PSP Platon
                    "gatewayMerchantId": "RJ9AE5Y7GX" //API ключ PSP Platon
                }
            }
        }
    ],
    "merchantInfo": {
        "merchantId": "00986993593073708917", //ваші дані з Google Business Console
        "merchantName": "Name" //ваші дані з Google Business Console
    },
    "transactionInfo": {
        "totalPriceStatus": "FINAL",
        "totalPriceLabel": "Total",
        "totalPrice": "5.00",
        "currencyCode": "UAH",
        "countryCode": "UA"
    }
}

{
  "apiVersionMinor": 0,
  "apiVersion": 2,
  "paymentMethodData": {
    "description": "Mastercard •••• 5179",
    "tokenizationData": {
      "type": "PAYMENT_GATEWAY",
      "token": {
        "signature": "MEYCIQC+IHxUu9Wwra2Vu6tBa2wJPCMT3pWtN1VphLGYtNVLLwIhAOkdbNje//eLrXVc+n6LOlc4PqxWOUcqwrmki/CNA1ur",
        "intermediateSigningKey": {
          "signedKey": "{\"keyValue\":\"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEwhRrvGB0kZ1248MEJAPwX0YfrQInhyyRM7nyGFjQuzGSViZG3QC9NMvXR9Zd6uVcVzAz+6K/+NEGIWbX8zbk6A\\u003d\\u003d\",\"keyExpiration\":\"1571208568000\"}",
          "signatures": [
            "MEUCIQCR6vIEiyHB8qmlho4/tLd7W8CIGrZDJlCI48CBHeFPvQIgLZJIe4cZv6pYtYYa56QCI/vvg1GqXTP3bTBjO49r5mI="
          ]
        },
        "protocolVersion": "ECv2",
        "signedMessage": "{\"encryptedMessage\":\"k85CGUMmd5PaGmQlHFqHc0HrDZmjM1yG82rFB/p31ZyUleN5nihzjOZif/BKXwg3XA2oLXqBSSWcAdfZwXxCEOqvAQE+kpTC7qVO4wTPip6RruraT6vO9M9FtIf0kcqzYSAN7pl1SUA5jC9rHrqucPoh0/FSspup78SWBt8TnmVKC9O3sQhIZ3SMoGOG4mdjtIrgCwWH2cbrxUH0dHAqOe5ANGOY/mII4nTEp7xaKu41hK/kFE15zVyqgPJXP9bPxzMVk/ozEZSfhSzVTS+9stjkU/kT5EibKB3O1bbxyybKcGQ5vxBOtNOBKKd/NuqNmN2eEK3UbSKb1M3gv45gT9cCeEvlzO7Wg0N100vUBp9RPDN9TH4tj4w578sWFKfTi6FsSrZB27SGWcU0EaKHO9buo94mRBY5yqffF3bKg5mAMPzjDhyHSujqWKAs9C5fBzMEuEr2z7A23kfLqBceH5uS9LJMiZ/yVKCwfpY9u2XyCjKdp7I\\u003d\",\"ephemeralPublicKey\":\"BAMDAtfgcPNuzItrwGLigGj3rtxmyHhZLwx1B4RJZ2oo11jpFf3SA6a3utryCMmlCEcqLfLn6WDH2ArrNBGn+Ew\\u003d\",\"tag\":\"T/qhZ/XY5/3Fe4QBKafm6NqS6EzwVeiKXhRlp8NeWrA\\u003d\"}"
      }
    },
    "type": "CARD",
    "info": {
      "cardNetwork": "MASTERCARD",
      "cardDetails": "5179"
    }
  }
}

{
  "signature": "MEYCIQC+IHxUu9Wwra2Vu6tBa2wJPCMT3pWtN1VphLGYtNVLLwIhAOkdbNje//eLrXVc+n6LOlc4PqxWOUcqwrmki/CNA1ur",
  "intermediateSigningKey": 
    {
    "signedKey": "{
        \"keyValue\":\"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEwhRrvGB0kZ1248MEJAPwX0YfrQInhyyRM7nyGFjQuzGSViZG3QC9NMvXR9Zd6uVcVzAz+6K/+NEGIWbX8zbk6A\\u003d\\u003d\",
        \"keyExpiration\":\"1571208568000\"
      }",
      "signatures": [
        "MEUCIQCR6vIEiyHB8qmlho4/tLd7W8CIGrZDJlCI48CBHeFPvQIgLZJIe4cZv6pYtYYa56QCI/vvg1GqXTP3bTBjO49r5mI="
      ]
    },
    "protocolVersion": "ECv2",
    "signedMessage": "{
      \"encryptedMessage\":\"k85CGUMmd5PaGmQlHFqHc0HrDZmjM1yG82rFB/p31ZyUleN5nihzjOZif/BKXwg3XA2oLXqBSSWcAdfZwXxCEOqvAQE+kpTC7qVO4wTPip6RruraT6vO9M9FtIf0kcqzYSAN7pl1SUA5jC9rHrqucPoh0/FSspup78SWBt8TnmVKC9O3sQhIZ3SMoGOG4mdjtIrgCwWH2cbrxUH0dHAqOe5ANGOY/mII4nTEp7xaKu41hK/kFE15zVyqgPJXP9bPxzMVk/ozEZSfhSzVTS+9stjkU/kT5EibKB3O1bbxyybKcGQ5vxBOtNOBKKd/NuqNmN2eEK3UbSKb1M3gv45gT9cCeEvlzO7Wg0N100vUBp9RPDN9TH4tj4w578sWFKfTi6FsSrZB27SGWcU0EaKHO9buo94mRBY5yqffF3bKg5mAMPzjDhyHSujqWKAs9C5fBzMEuEr2z7A23kfLqBceH5uS9LJMiZ/yVKCwfpY9u2XyCjKdp7I\\u003d\",
      \"ephemeralPublicKey\":\"BAMDAtfgcPNuzItrwGLigGj3rtxmyHhZLwx1B4RJZ2oo11jpFf3SA6a3utryCMmlCEcqLfLn6WDH2ArrNBGn+Ew\\u003d\",
      \"tag\":\"T/qhZ/XY5/3Fe4QBKafm6NqS6EzwVeiKXhRlp8NeWrA\\u003d\"
    }"
  }
}

<?php
  $pass='***************'; //Client's password
  $params['action']='DEBIT_PREPARE_GOOGLE_PAY';
  $params['client_key']='******'; //Client's KEY 
  $params['order_id']='Platon_test_37254'.rand(100, 999);
  $params['order_amount']='10.00';
  $params['order_currency']='UAH';
  $params['order_description']='test_by_Platon';
  $params['payment_token'] = *****;
  $params['payer_first_name']='Jack';
  $params['payer_last_name']='Anderson';
  $params['payer_phone']='380962111111';
  $params['payer_address']='NA';
  $params['payer_country']='UA';
  $params['payer_state']='NA';
  $params['payer_city']='NA';
  $params['payer_zip']='01001';
  $params['payer_email']='test@test.com';
  $params['payer_ip']='111.111.111.111';
  $params['term_url_3ds']='https://google.com';
  $params['signature'] = sha1($pass . strtolower(implode('', $params)));
  
  $url = 'https://secure.platononline.com/p2p-debit/';
  
  $tempData = array();
    foreach ($params as $key => $value) {
      $tempData[] = $key.'='.urlencode($value);
    }
    
  $crq = curl_init();
    curl_setopt($crq, CURLOPT_URL, $url);
    curl_setopt($crq, CURLOPT_HEADER, 0);
    curl_setopt($crq, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($crq, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($crq, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($crq, CURLOPT_POSTFIELDS, implode('&', $tempData));
    $result = curl_exec($crq);
    if (curl_errno($crq)) {
      echo 'ERROR: '.curl_error($crq);
    }
    curl_close($crq);

  echo $result;
  $moda = json_decode($result, true);

  $pars['action']='DEBIT_RUN';
  $pars['client_key']='*******';
  $pars['trans_id']=$moda['trans_id'];
  $pars['signature']= sha1($pass . strtolower(implode('', $pars)));
  
  $temp = array();
    foreach ($pars as $key => $value) {
      $temp[] = $key.'='.urlencode($value);
    }
  $crq = curl_init();
    curl_setopt($crq, CURLOPT_URL, $url);
    curl_setopt($crq, CURLOPT_HEADER, 0);
    curl_setopt($crq, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($crq, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($crq, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($crq, CURLOPT_POSTFIELDS, implode('&', $temp));
    $res = curl_exec($crq);
    if (curl_errno($crq)) {
      echo 'ERROR: '.curl_error($crq);
    }
    curl_close($crq);
  
  echo $res;
  $respRedirect = json_decode($res, true);
  echo $respRedirect['redirect_url'];
  
  header('Location: '.$respRedirect['redirect_url']);
  
?>