Payments are Exactly Transferring Money Or Giving Credit from One Client to Another.
Credit Amount Have to be save in some place.
Client-side is not a good field for this work because the receiver should trust the sender and sender always could get offline and get unreliable ....
so there need for an back-end which has to be:
- always accessible (online)
- trust able by a wide range of people
but this criteria can be made via 2 approaches:
centralized : which needs a server which perform payment action and client would communicate with APIs.
decentralized : client sending payments to miners to approve. (in this case there is no need for you to implement backend)
The Most Security issue that concerns client is how to avoid account hijacking:
in centralized : client should transfer sensitive data securely and saving no tokens/ password in client system.
in decentralized: client shouldn't save any private key or backup phrases in client side. every other aspects are secure via blockchain back-end.
for a successful only Client Implementation Payment Solution, i
recommend you to use Cryptocurrency blockchains as a backend.
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