Ewallets endpoints

[ErvanAdetya]

• Create Payment
• Get Payment

[stanleynguyen]

Hey @ErvanAdetya, thank you so much for the effort put in, the code looks awesome. Just a few points that I would need your help with:

• Having 3 separate classes for 3 different ewallets types to solve the problems of LINKAJA not supporting getPayment endpoint is an overkill in my opinion, which leads to code duplication. I think a better approach would be to have just 2 methods one for createPayment and one for getPayment right inside EWallet class and have 2 separate enums CreateSupportWalletTypes and GetSupportWalletTypes
• Integration tests can be done with both createPayment and getPayment and done without a lot more effort if first point is taken into account, hence, it would be lovely if you can add one more step of getPayment to the current integration test
• There are some linting warnings that need to be addressed (Github pointed it out here but you can check in your local with npm run lint too)

[stanleynguyen]