Deployed app

Click to visit deployed app

Check List

• ✅ The player can at all times see their current score and the latest available BTC price in USD
• ✅ The player can choose to enter a guess of either “up” or “down“
• ✅ After a guess is entered the player cannot make new guesses until the existing guess is resolved
• ✅ The guess is resolved when the price changes and at least 10 seconds have passed since the guess was made
• ✅ If the guess is correct (up = price went higher, down = price went lower), the user gets 1 point added to their score. If the guess is incorrect, the user loses 1 point.
• ✅ Players can only make one guess at a time
• ✅ New players start with a score of 0
• ✅ The guesses should be resolved fairly using BTC price data from any available 3rd party API
• ✅ The score of each player should be persisted in a backend data store (AWS services preferred)
• ✅ Please provide us a link to your deployed solution.
• ✅ Optional: Players should be able to close their browser and return back to see their score and continue to make more guesses

Getting Started

First, run the development server:

// If you run into issues when running `npm install` add `--force` flag
npm install
npm run dev

Open http://localhost:3000 with your browser to see the result.

Environment variables

Add these to your .env.local file

NEXT_PUBLIC_ACCESS_KEY_ID=GET_VALUE_FROM_YOUR_OWN_AWS_CONSOLE

NEXT_PUBLIC_ACCESS_KEY_SECRET=GET_VALUE_FROM_YOUR_OWN_AWS_CONSOLE

Running tests

npm run test

Deployment

npx vercel --prod

How this app works

Click to open Miro board

Possible improvements for future

• Use AWS Step functions to resolve bets after the expiration time.

Ideally something like this:

resolveBet(resolveParams, { delay: betDuration });