Application US20200286047

SYSTEMS AND METHODS FOR WITHDRAWAL CONSOLIDATION
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US20200286047

1. A method comprising: with a non-custodial cryptocurrency platform: (8) (6)

receiving a withdrawal request from a client device, the withdrawal request identifying a withdrawal amount and a withdrawal destination;

selecting payment representations to satisfy the withdrawal request, by using payment unit information stored by the platform for a user of the client device;

generating an unsigned withdrawal transaction that identifies the selected payment representations and the withdrawal destination;

sending the unsigned withdrawal transaction to a signing enclave included in the client device;

receiving a signed withdrawal transaction from the signing enclave; and

sending the signed withdrawal transaction to a cryptocurrency network.

1. method of claim 1, further comprising: with the platform: storing payment unit information for the user. (0)

2. The method of claim 1, wherein the withdrawal destination is a cryptocurrency address, and wherein the payment representations are unspent transaction outputs. (0)

3. The method of claim 1, wherein the withdrawal destination is a cryptocurrency account, and wherein the payment representations are cryptocurrency accounts. (0)

4. The method of claim 1, wherein the stored payment unit information identifies payment destinations used for payment transactions to the user. (0)

5. The method of claim 1, wherein the platform receives the withdrawal request via an HTTP (Hypertext Transfer Protocol) application programming interface (API) of the platform, and provides the unsigned withdrawal transaction to the signing enclave included via HTTP. (1) (0)

8. The method of claim 1, wherein selecting payment representations to satisfy the withdrawal request comprises: (0) (2)

9. The method of claim 1, further comprising: (0) (2)

10. The method of claim 1, wherein the signing enclave is controlled by one of an accounting system, a billing system, a point of sale system, and an e-commerce system. (0)

12. The method of claim 11, further comprising: with the platform: (2) (5)

receiving a charge request from a payor system, wherein the charge request is a request to pay the user on behalf of a payor;

determining a payment destination for the user;

sending information identifying the payment destination to the payor system;

monitoring for verification of a payment transaction to the payment destination;

in response to verification of the payment transaction to the payment destination, updating the stored payment unit information for the user to include information identifying the payment destination used for the payment transaction.

13. The method of claim 12, wherein determining a payment destination for the user comprises receiving information identifying the payment destination from the client device. (0)

14. The method of claim 12, wherein determining a payment destination for the user comprises generating a payment address by using an extended public key received from the user device. (2) (0)

15. The method of claim 14, (1) (2)

17. The method of claim 14, further comprising: with the platform; (0) (2)

18. A method comprising: with a non-custodial cryptocurrency platform: (0) (6)

receiving a withdrawal request from a client device, the withdrawal request identifying a withdrawal amount and a withdrawal destination;

selecting payment representations whose combined amounts are greater than or equal to the withdrawal amount, by using payment unit information stored by the platform;

generating a plurality of unsigned withdrawal transactions that each identify a subset of the selected payment representations and the withdrawal destination;

sending each unsigned withdrawal transaction to a signing enclave included in the client device;

receiving a plurality of signed withdrawal transactions from the client device; and

sending the signed withdrawal transactions to a cryptocurrency network.

19. A system comprising: (1) (8)

a non-custodial cryptocurrency payment platform comprising an HTTP withdrawal API;

a user device comprising a secure sandboxed front end module communicatively coupled to the platform via the withdrawal API; and

a payor system communicatively coupled to the platform,

wherein the payor system comprises a transaction generation module that generates payment transactions using payment destination information provided by the platform;

wherein the front end module comprises:

a key generation module that generates an extended public key used by the platform to generate the payment destination information for the payor system;

a signing module that securely signs withdrawal transactions received from the platform via the withdrawal API; and

an interface that receives a private key used by the signing module to sign withdrawal transactions.

20. The system of claim 19, wherein the payor system comprises a shopping application client, and wherein the user device comprises a shopping application server. (0)

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Application US20200286047

SYSTEMS AND METHODS FOR WITHDRAWAL CONSOLIDATION

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