In React-Native, how do I complete checkout with manual payment and alternative payment method?

[edem]

I am going to create a react-native App for EC with Shopify.
After create checkout, how do I complete this checkout with manual payment and alternative payment method? 
Would you show me the right API and example?
Thank you.

[hermanq42]

It is sad that no answer has been provided. I've created a more detailed question asking a similar question, as the default payment methods do not cut it for us:

https://community.shopify.com/c/payments-shipping-and/complete-checkout-with-alternative-payment-met...