curl --request POST \
  --url https://api-beta.pepay.io/api/commerce/merchant/carts/validate \
  --header 'Content-Type: application/json' \
  --header 'x-commerce-api-key: <api-key>' \
  --data '
{
  "wallet_address": "<string>",
  "wallet_network": "<string>",
  "customer_id": "<string>"
}
'

{
  "success": true,
  "valid": true,
  "items": [
    {
      "itemId": "<string>",
      "available": true,
      "currentPrice": 123,
      "savedPrice": 123,
      "priceChanged": true
    }
  ],
  "summary": {}
}