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This app is designed to provide real-time Bitcoin price information and allow users to view the prices of various items in terms of Bitcoin. It fetches the current Bitcoin price from the CoinGecko API and displays it alongside the prices of selected items in multiple fiat currencies, including USD, EUR, GBP, AUD, and JPY. To use the app, users can select their preferred currency from a set of buttons. The app will then display the prices of various items in that currency, as well as the equivalent price in Bitcoin. Users can refresh the data manually to get the latest prices, which are updated every minute. Additionally, when hovering over an item, users can see historical Bitcoin prices for that item over different time periods, along with trends indicating price changes. The app is built using TypeScript and React, leveraging the Next.js framework for server-side rendering and API routes. It utilizes the CoinGecko API to fetch Bitcoin price data and employs React hooks for managing state and side effects related to data fetching. The user interface is styled using a combination of custom components and utility classes. Key features of the app include: - Employs the Satoshi Standard - Real-time Bitcoin price updates with a fallback mechanism in case of API failure. - Support for multiple fiat currencies, allowing users to view prices in their preferred currency. - Historical price data for various items, displayed in a tooltip when hovering over an item. - A responsive design that adapts to different screen sizes, ensuring a good user experience on both desktop and mobile devices. - A refresh button to manually update the displayed prices. Overall, this app serves as a practical tool for users interested in understanding the value of items in terms of Bitcoin, providing both current and historical price insights.