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M70-201 - Magento Certified Developer Plus Exam
How can you make a payment method store entire credit card numbers?
For security reasons, there are no native ways for doing that.
Pass the credit card number to the payment method: it will be stored automatically.
Change the protected property of payment method $_canSaveCc to true.
Configure your method to save the card number by setting 1 to the following xpath: default/payment/_NAME_/save_cc
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