PayKassa
Merchant Account Settings
Register or log in to the PayKassa.pro system.
Go to the "Merchants" section and click the "Add Merchant" button.

Fill out the form that appears:

Name - any suitable name
Domain (without http:// or https://) - your domain (e.g., premiumexchanger.com
)
Merchant Support Email (public information) - your public email address
Merchant Password - the password for logging into the merchant module
Payment Notification URL [sci_confirm_order] - http(s)://
your_domain
/merchant-paykassa_status.html
Success Payment Redirect URL [redirect] - http(s)://
your_domain
/merchant-paykassa_success.html
Failure Payment Redirect URL [redirect] - http(s)://
your_domain
/merchant-paykassa_fail.html
Cryptocurrency Transaction Handler URL (optional) [sci_confirm_transaction_notification] - http(s)://
your_domain
/merchant-paykassa_status.html
Replace "your_domain" with the name of your exchange point's domain.
In the settings of the created merchant, you will see the "Merchant ID."

Module Settings
In the admin panel, go to the "Merchants" -> "Merchants" section, click the "Add" button, and select PayKassa.

Fill in the required authorization fields.

Store ID - Merchant ID from your PayKassa account
Store Secret Key - the password generated by PayKassa when creating the merchant (Merchant Password)
Special Fields

Show QR Code on Payment Page - a QR code will be displayed for quick payment access for the customer
Payment Method - select the currency/network for receiving funds

- a confirmed transaction means it has been included in a block and, therefore, in the blockchain. It has been verified and recorded, the payment has been processed, and it cannot be changed or canceled. To be considered legitimate, the operation must receive a certain number of confirmations. Each new confirmation exponentially reduces the risk of the transaction being reversed.
Continuing the Setup
Next, configure the merchant by following the general setup instructions.
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