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Base Quest

This is an experimental Farcaster frame app for an AI text-based adventure powered by the Base L2. Base Quest is still a work in progress and subject to change.

Base Quest Splash Screen

Want to play?

Follow me on Farcaster for the latest game link: https://warpcast.com/seangeng

Features

  • AI Driven Gameplay ✅
  • Leaderboard ✅
  • Option to continue vs start a new game ✅
  • Issue Character NFTs on Base & save state to them ✅
  • Notifications
  • Character attributes
  • Game backgrounds & environments (✅ testing)
  • $EXP Tokens
  • Character profile links & PvP (✅ testing)
  • Multi-player quests

How it Works

Technical Diagram

This high level diagram explains the frame states & how menu actions are managed generically. Buttons can be passed to the menu in the GET parameter, and map to the business logic - essentially acting as a router.

Several awesome SDKs & frameworks are leveraged to accelerate developement:

Coinbase OnChain Kit: For frame helpers & future onchain actions.

Neynar: Making it easy to interact with Farcaster

OpenAI: For chat completions & image generation.

Inngest: For executing background jobs (there is latency when generating images + certain onchain actions)

Vercel: For hosting, and easy programmatic OpenGraph image generation:

Basic AI Workflow

Base Quest uses the OpenAI GPT 3.5 Turbo model to narrate & continue the storyline. That means each user's journey is completely unique!

Check out the /src/app/api/prompt/route.tsx file to see how the AI prompt loop works:

  1. AI generates the prompt & button options
    • system: You are the narrator in a choose your own adventure text-based game.
    • The user is a {class} starting their first adventure.
    • Write a character narration prompt (up to 100 characters), and present the user with either 2 or 4 action options to continue the story.
    • Action options should be either emoji(s) or short button text (up to 14 characters)
    • Return a JSON response like so: { }
  2. Present options as next frame og:buttons
  3. Feed the previous prompt & user selected action to the next prompt screen

Onchain Interactions

To avoid timeouts and for better resiliency - Inngest is leveraged to run serverless jobs async & in the background. This pattern has better monitoring, auto-retrys, and decouples business logic from the frame rendering.

Check out /src/app/inngest/functions.tsx to see how this works.

We use the InstaMint.sol contract - developed by my team at Coinbase & optimized for gas & ease of use! The NFT factory contract is available at: Sepolia Testnet: 0x4d64cAc5Bd09c7CaC9748D1E5a63A30Ee40B6A40 Base Mainnet: 0x85db63af3f0cfac7813abb4dfca6d713e937a5dd

Want to build onchain?

The future is onchain. Does this interest you? Do you think you can do better? Coinbase hires the top 1% of developers - reach out to me for a possible referral: https://www.linkedin.com/in/seangeng/

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Farcaster Frames Text-based Adventure on the Base L2

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