Build shopify app

I need a new app, using the best standards, that will integrate my api from https://coinwall.dev. This app, in the admin are must have the following inputs for the administrator: - Initially it will show an input to add a coin "sigla", for example BTC, if you click add , it will create the coin adress input, for user to write it , as its needed for the API gateway. - Input for putting the address for all coins avaliable, the ones the user added to his dash. I must be able to dynamicly add and remove coins on the admin dashboard - For each coin you should have a enable checkbox to show in the frontend and hide when not checked. - A input for the callback link of the user - A select box to choose the currency (USD, EUR, GBP) - It should have my copyright on the footer [login to view URL] with a redirect link to our website. The app must have this functionality: - It must work as a payment method, so it should be avaliable to be activated in the payment settings as others do. - The user may enable or disable it from the frontend, and it must show when going to the cart. - All the API references describe how it is done, you basicly do a request, where it will return an embed url, which you will grab and create an iframe to show the gateway, from there the only thing you have to do is have a callback listening. - You should have a callback made in the plugin for when the coinwall callback contacts you to say a transaction is confirmed with the secret as security. All this is also documented.