curl --request POST \
  --url https://api.wizzgift.com/retailer/v1/checkouts/{checkoutId}/payment \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "paymentMethodId": "<string>",
  "payCurrency": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({paymentMethodId: '<string>', payCurrency: '<string>'})
};

fetch('https://api.wizzgift.com/retailer/v1/checkouts/{checkoutId}/payment', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.wizzgift.com/retailer/v1/checkouts/{checkoutId}/payment"

payload = {
    "paymentMethodId": "<string>",
    "payCurrency": "<string>"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.wizzgift.com/retailer/v1/checkouts/{checkoutId}/payment",
  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([
    'paymentMethodId' => '<string>',
    'payCurrency' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

{
  "payment": {
    "paymentMethodId": "<string>",
    "status": "pending",
    "paymentId": "<string>",
    "appliedAmount": 123,
    "appliedCurrency": "<string>",
    "providerAmount": 123,
    "providerCurrency": "<string>",
    "providerPaymentId": "<string>",
    "paymentUrl": "<string>",
    "paymentAddress": "<string>",
    "memo": "<string>",
    "destinationTag": "<string>",
    "amount": "<string>",
    "currency": "<string>",
    "network": "Bitcoin",
    "exchangeRate": "<string>",
    "expiresAt": 1753142400000,
    "qr": {
      "withAmount": "<string>",
      "withoutAmount": "<string>"
    },
    "fee": {
      "percentage": 123,
      "fixed": 123,
      "recommended": true,
      "feeUnit": "sat/vB"
    },
    "errorMessage": "<string>"
  }
}

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid input"
  },
  "requestId": "req_8f3k2"
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Invalid or expired API key"
  },
  "requestId": "req_8f3k2"
}

{
  "error": {
    "code": "NOT_FOUND",
    "message": "Checkout not found"
  },
  "requestId": "req_8f3k2"
}

{
  "error": {
    "code": "CONFLICT",
    "message": "externalRef already used on another API surface"
  },
  "requestId": "req_8f3k2"
}

{
  "error": "Too many requests",
  "message": "<string>"
}