🐱 Maya

Cat on-chain · A living pet powered by Solana

👇 Demo

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🌍 What is Maya?

Maya is a living, on-chain cat.

She lives entirely on the Solana blockchain.
Anyone on the internet can feed her, play with her, and keep her alive — together.

If the community stops caring…
Maya’s health decays.
And if neglected long enough, she dies forever.

This is not a simulation.
This is a shared responsibility.

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✨ Core Idea

• 🧠 Single global pet (not NFTs, not copies)
• ⛓ On-chain state is the source of truth
• 🌐 Anyone can interact
• 💸 Feeding costs SOL
• ⏳ Time-based decay
• ☠️ Permanent death

Maya lives only if the world keeps her alive.

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🎮 How It Works

🐾 Actions

Anyone can:

• 🍽 Feed Maya → increases health & happiness (costs SOL)
• 🧶 Play with Maya → increases happiness
• ⏳ Let time pass → health & happiness decay automatically

⚠️ Decay

• Hunger and happiness decay over time
• Decay is enforced on-chain
• If hunger reaches 0, Maya dies permanently

🔥 Community Driven

• Every interaction is public
• Latest feeders are visible
• The chain remembers who cared

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🧱 Architecture

On-chain (Solana + Anchor)

• Global PDA for Maya
• Time-based decay logic
• SOL escrow inside the pet account
• Owner-only withdrawal
• Emitted events for real-time UI

Frontend

• Wallet-based interaction (Phantom)
• Real-time account & event subscriptions
• Animated cat (happy, sad, eating, dead)
• Live health & happiness bars
• Feed history & community activity

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🛠 Tech Stack

Blockchain

• Solana
• Anchor
• Rust

Frontend

• Next.js
• @coral-xyz/anchor
• @solana/wallet-adapter
• Three.js / React Three Fiber (for 3D cat)

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🧪 Development

localnet

make sure you are running validator

solana-test-validator --reset

Build program

anchor build

Deploy program

anchor Deploy

Frontend

cd maya/app

npm install && npm run dev

voila! keep your pet alive

envs for frontend

Inside app/ Create a .env.local.example and place this

# Maya Frontend Configuration
# Copy this to .env.local and update the values

# The Program ID of your deployed Anchor program
NEXT_PUBLIC_PROGRAM_ID=JSkdjZGLt8gKvFsQCB2Kzd7ERgUEk1FXNJEeUiw9PWM

# The Public Key that is authorized to initialize the pet (defined in lib.rs)
NEXT_PUBLIC_OWNER_KEY=9Yz1ZHg1SFzrhHgVXKnLSBSUBtzo8uTsmwHpkzcbmNzv

# The Solana RPC Endpoint to connect to
NEXT_PUBLIC_RPC_ENDPOINT=http://localhost:8899

Change program id, and wallet id (owner key, only this wallet can initialize the pet) according to your choice.

envs for programs

Inside programs/maya/src/constants.rs

Change OWNER: pubkey as your choice.

Make sure your program id in lib.rs and Anchor.toml is matching.

(these keys should match with the keys that you pasted on frontend .env)