Mastercard has just filed a patent for a “Method and System For Instantaneous Payment Using Recorded Guarantees.” This is, in short, a patent for a blockchain-based system that offers instant payment.
The patent describes
A method for processing a guaranteed electronic transaction, includes: storing account profile, each include an account number and balance; receiving a transaction message from an acquiring financial institution via a payment network, the message including a specific account number, transaction amount, and payment guarantee data; identifying a specific account profile that includes the specific account number; deducting the transaction amount from the account balance in the specific account profile; generating a record of payment guarantee that includes the transaction amount and data associated with the payment guarantee data; generating a return message including a response code indicating transaction approval and data associated with the generated record; transmitting the generated record to a computing system via a communication network; and transmitting the generated return message to the acquiring financial institution via the payment network.
While the abstract itself doesn’t mention blockchain, Mastercard intends to use the technology in the process, describing a step in which “the payment guarantee data stored in the third data element included in the received transaction message includes at least a blockchain network identifier and (i) a public key or (ii) a destination address, the record of payment guarantee is a blockchain transaction for payment of the transaction amount stored in the second data element included in the received transaction message to (i) the destination address or (ii) a destination address associated with the public key, and the computing system is a node in a blockchain network corresponding to the blockchain network identifier.”
That’s definitely a mouthful, but it basically means they’ll store a record of the transaction in some immutable form.