Shared mobile payments

1. A system comprising:

a non-transitory memory storing program instructions; and

one or more hardware processors coupled to the non-transitory memory and configured to execute the program instructions to cause the system to perform operations comprising:

detecting, by a first payment application of a first user device, an interaction between the first user device and an object, wherein the first user device is associated with a first user account of a first user;

determining, by the first payment application and based on the interaction, a purchase request for a purchase of a product through the first user account;

presenting, by the first payment application on the first user device, a first user interface for confirming the purchase, wherein the first user interface includes a share payment selector for sharing the purchase with one or more other users;

in response to receiving a selection of the share payment selector, monitoring, by the first payment application, physical interactions between the first user device and other devices;

detecting, by the first payment application and based on the monitoring, a discovery of a second user device of a second user using a near field communication (NFC);

accessing a second user account of the second user to determine communication information associated with the second user;

in response to the detecting, electronically transmitting, by the first payment application, a first message to a second payment application of the second user device based on the communication information associated with the second user, the first message including a request to participate in the purchase of the product;

updating the first user interface of the first payment application and a second user interface of the second payment application based on one or more inputs received via the second user interface of the second payment application, wherein the one or more inputs indicate an amount proposed by the second user for the purchase of the product;

determining a first contribution amount by the first user and a second contribution amount by the second user based at least in part on the one or more inputs; and

processing a transaction for the purchase of the product using the first contribution amount obtained from the first user account of the first user and the second contribution amount obtained from the second user account of the second user.

2. The system of claim 1 , wherein the operations further comprise:

detecting a physical tap between the second user device and a third user device of a third user; and

in response to detecting the physical tap, electronically transmitting a second message to a third payment application of the third user device, the second message including a second request to participate in the purchase of the product, wherein the updating is further based on one or more second inputs received via a third user interface of the third payment application, and wherein the one or more second inputs indicate a second amount proposed by the third user for the purchase of the product.

3. The system of claim 2 , wherein the operations further comprise recalculating the first contribution amount and the second contribution amount based on the second one or more inputs.

4. The system of claim 1 , wherein the operations further comprise determining a payment amount associated with the transaction based on the interaction.

5. The system of claim 1 , wherein the interaction comprises the first user device scanning a quick response code associated with the product.

6. The system of claim 1 , wherein a time limit is associated with a completion of the transaction.

7. The system of claim 1 , wherein the operations further comprise:

detecting a second physical tap between the first user device and a third user device of a third user; and

in response to detecting the second physical tap, electronically transmitting a second message to the third user device, the second message including a second request to participate in the purchase of the product.

8. A method comprising:

detecting, by a first payment application of a first user device, an interaction between the first user device and an object, wherein the first user device is associated with a first user account of a first user;

determining, based on the interaction, a purchase request for a purchase of a product through the first user account;

presenting, by the first payment application on the first user device, a first user interface for confirming the purchase, wherein the first user interface includes a share payment selector for sharing the purchase with one or more other users;

in response to receiving a selection of the share payment selector, monitoring, by the first payment application, physical interactions between the first user device and other devices;

detecting, by the first payment application based on the monitoring, a discovery of a second user device of a second user using a near field communication (NFC);

determining communication information associated with the second user based on the second user account;

electronically transmitting a first message to a second payment application of the second user device based on the communication information associated with the second user, the first message including a request to participate in the purchase of the product;

updating the first user interface of the first payment application and a second user interface of the second payment application based on one or more inputs received via the second user interface of the second payment application, wherein the one or more inputs indicate an amount proposed by the second user for the purchase of the product;

determining a first contribution amount by the first user and a second contribution amount by the second user based at least in part on the one or more inputs; and

transferring the second contribution amount from the second user account to the first user account of the first user, and processing the transaction for the purchase of the product using the first user account.

9. The method of claim 8 , further comprising:

detecting a physical interaction between the second user device and a third user device of a third user; and

in response to detecting the physical interaction, electronically transmitting a second message to a third payment application of the third user device, the second message including a second request to participate in the purchase of the product, wherein the updating is further based on second one or more inputs received via a third user interface of the third payment application, and wherein the second one or more inputs indicate a second amount proposed by the third user for the purchase of the product.

10. The method of claim 8 , wherein the processing the transaction for the purchase of the product using the first user account includes using a payment amount associated with the first user account to purchase the product, and wherein the payment amount is a sum of the first contribution amount and the second contribution amount.

11. The method of claim 8 , further comprising determining a payment amount associated with the transaction based on the interaction.

12. The method of claim 8 , wherein the first message is transmitted to the second user device further based on a location of the second user device.

13. The method of claim 8 , wherein the interaction comprises the first user device scanning a quick response code associated with the product.

14. The method of claim 9 , further comprising recalculating the first contribution amount based on the one or more second inputs.

15. A non-transitory machine-readable medium having stored thereon machine-readable instructions executable to cause a machine to perform operations comprising:

detecting an interaction between a first user device and an object, wherein the first user device is associated with a first user account of a first user;

determining, based on the interaction, a purchase request for a purchase of a product through the first user account;

presenting, on the first user device via a first payment application of the first user device, a first user interface for confirming the purchase, wherein the first user interface includes a share payment selector for sharing the purchase with one or more other user;

in response to receiving a selection of the share payment selector, monitoring communications between the first user device and other devices;

detecting, based on the monitoring, a discovery of a second user device of a second user by the first user device using a near field communication (NFC);

in response to the detecting, electronically transmitting a first message to a second payment application of the second user device, the first message including a request to participate in the purchase of the product;

updating the first user interface of the first payment application and a second user interface of the second payment application based on one or more inputs received via the second user interface of the second payment application, wherein the one or more inputs indicate an amount proposed by the second user for the purchase of the product;

determining a first contribution amount by the first user and a second contribution amount by the second user based at least in part on the one or more inputs; and

processing a transaction for the purchase of the product using the first contribution amount obtained from the first user account of the first user and the second contribution amount obtained from the second user account of the second user.

16. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise:

detecting a second discovery of a third user device of a third user by the second user device using the NFC;

in response to detecting the second discovery, electronically transmitting a second message to a third payment application the third user device, the third message including a second request to participate in the purchase of the product, wherein the updating is further based on one or more second inputs received via a third user interface of the third payment application, and wherein the one or more second inputs indicate a second amount proposed by the third user for the purchase of the product.

17. The non-transitory machine-readable medium of claim 16 , wherein the operations further comprise recalculating the first contribution amount and the second contribution amount based on the one or more second inputs.

18. The non-transitory machine-readable medium of claim 15 , wherein the first message is transmitted to the second user device further based on a location of the second user device.

19. The non-transitory machine-readable medium of claim 15 , wherein the interaction comprises the first user device scanning a quick response code associated with the product.

20. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise:

in response to receiving a request from the second user device to share the purchase of the product with a third user associated with a third user device, electronically transmitting a second message to a third payment application of the third user device, wherein the second message includes a second request to participate in the purchase of the product.