Embed a website in telegram web app

Project goal:

To develop a WebApp (embedded application for Telegram) for the site (after signing the NDA), similar in functionality to the existing ChangeHeroBot bot (https://t.me/ChangeHeroBot ). WebApp should provide users with the ability to exchange cryptocurrencies directly through Telegram, using the capabilities and API of the site platform (the name of the site after signing the NDA).

Main task:

Transferring the site to a bot while maintaining the basic functionality
Functionality to be implemented:
Selection of the type of service (exchange, dex, purchase with fiat, stake, credits, p2p)Calculator with a field for entering the exchange amount with automatic calculation of the equivalent amount in the selected cryptocurrency. Information about the minimum and maximum amount for exchange (the functionality has already been implemented on the site)Displaying offers according to the data specified in the calculatorChoosing an offer, an interactive exchange form. That is, a field for entering the users wallet address to receive cryptocurrency, a field for entering the address for sending cryptocurrency, checking the correctness of the entered dataTransaction screen, which will display the status (e.g. in progress, completed, canceled)Link or other solution that allows the user to contact technical supportNotifications and notifications. Built-in notification system that informs the user about the status of the exchange (in progress, completed, error).
Features:
Registration on the site is not required to carry out transactionsTransactions take place in a third-party electronic wallet
The WebApp should work correctly on all devices that support Telegram, both on mobile and desktop platforms.

Important: before starting work and providing a link to the site and all necessary access, it is required to sign an NDA.