Website backend development for cryptocurrency quote.

Description: Website backend development for cryptocurrency quote. Cryptocurrency values ​​must be transformed into reais and vice versa. A page will be implemented for site users with a currency conversion feature containing the value of the cryptocurrency and the corresponding value in reais. The page should follow the template attached 01, this is already ready the page html and css. Users screen requirements are: - Calculation of values; - When reversing the Send / Receive source, the system should recalculate the price. Eg User starts with a purchase of $ 10,000 and receives 0.25 btc. User pressing the invert button changes the values ​​according to the quotation. - Display time for quote update; - By clicking on the negotiate button, the user will be redirected to the company whatsapp. An administrative area for cryptocurrency control should also be implemented (appendices 02, 03 and 04). These will be set according to the type of cryptocurrency. Bitcoin (Annex 02): In Bitcoin type, the following settings will be made: - BTC / Dolar quotation source selection (Binance + 1 source to be defined); - BTC / Real quotation source selection (up to 2 sources to be defined); - Only BTC / Dollar or BTC / Real font can be selected; - Dollar source selection (1 source or fixed dollar (monetary value set by the administrator)); - Definition of spread value; - The bitcoin price will be defined by a single quotation source, the others will be used only in case of unavailability. Example formula: Binance btc / usdt * fixed dollar price + 5% spread. Altcoins (Annex 03): In Altcoin type, the following settings will be made: - Exchange source selection (Binance + 1 source to be defined); - Dollar source selection (1 source or fixed dollar (monetary value set by the administrator)); - Definition of spread value; - Selection of available altcoins; - The price of altcoin will be defined by a single source of quotation, the others will be used only in case of unavailability. Example formula: Altance in Binance in Dolar (USDT) * dollar + spread. Stablecoins (Annex 04): In type Stablecoin, the following settings will be made: - Selection of Stablecoins us (ustd, tusd, pax); - selection of stablecoins br (real-t); - dollar source selection (1 source or fixed dollar (monetary value set by the administrator)); - definition of spread us value; - definition of spread value br; - The price of stablecoin usd will be defined as follows: formula: stablecoin in dollars (usdt) * dollar + spread. - The price of stablecoin BR will be defined as follows: Formula: Stablecoin in Real + spread. The quote should be retrieved automatically every 5 minutes in the APIs. A log will be created with the quotes made. Initially used apis, the others that are as an example in the attachments leave only the place for them to be implemented in the future. - Binance [login to view URL] - Bitmex [login to view URL] - Dollar quote [login to view URL] - bitcambio [login to view URL] - Bitcoin Market [login to view URL]