Currency in which the merchant will receive the funds in your country.

Brazilian Tax ID number, known as "CPF" or "CNPJ" will be used to pay this transaction.

Your system internal reference.

Merchant identifier. You must create the merchant beforehand and use here the same merchant_id returned during merchant creation, as described in the documentation: Create a Merchant.

Optional field used to display the final merchant’s name to the customer. After the PIX QR Code is scanned, the soft_descriptor is shown to help the customer confirm the transaction recipient before completing the payment.