🕹️ GamefiMantle

GamefiMantle is an innovative blockchain gaming platform built on Mantle Sepolia that revolutionizes Web3 payments. By combining advanced ERC-20 permission delegation with a gasless transaction architecture, it offers a seamless multiplayer RPG experience where players team up to fight enemies from the Upside Down.

This project demonstrates how sophisticated smart contract design can eliminate traditional blockchain friction—allowing users to focus on strategy and gameplay while the backend handles complex gas management and security.

🔐 Core Innovation: Advanced Permission System

The dApp features a unique three-tier permission architecture that enables trustless, gasless payments:

• Player Approval Layer: Users grant a one-time WMANTLE token approval to the smart contract, removing the need to sign every individual move.

• Delegation Layer: The GhostSessionDelegate contract manages spending permissions, allowing the system to securely execute actions within strict user-defined limits.

• Execution Layer: The backend server signs and submits transactions, paying all gas fees while the weapon cost is deducted from the shared team pool.

💰 Democratic Payment Governance

In Multiplayer Mode, the game implements on-chain voting for treasury management. Before any crypto is spent on weapons:

1. A player proposes a weapon.

2. A 10-second voting window opens.

3. The team must reach consensus (>50%) to authorize the transaction.

   This ensures fair resource allocation and prevents unauthorized spending, proving that Web3 payments can be both secure and democratically governed in real-time.

🎮 Gameplay Features

1. Character Selection

Choose from 10 iconic avatars before entering the rift:

• The Party: Mike, Eleven, Dustin, Lucas, Will, Max

• The Allies: Steve, Nancy, Jonathan, Hopper

2. Battle Modes

• 👤 Solo Mode: Instant action with direct control. No voting required—click to launch.

• 👥 Multiplayer Mode: Co-op PvE for 2-4 players. Features real-time WebSocket synchronization and team voting mechanics.

3. The Arena & Arsenal

Players face off against the Demogorgon, Mind Flayer, and Vecna across 5 rounds. Use WMANTLE to purchase weapons, with damage and effects rendered via real-time animations.

🏗️ Technical Architecture

• Frontend: Built with Next.js 16.1.1 (TypeScript), featuring Tailwind CSS for styling and Framer Motion for immersive battle animations.

• Web3 Integration: Uses RainbowKit, Wagmi, and Viem for seamless wallet connection and contract interaction.

• Real-Time Sync: Custom Node.js + Express backend using WebSockets (ws) to synchronize game state, votes, and health bars across all clients instantly.

• Blockchain: Deployed on Mantle Sepolia Testnet (Chain ID: 5003).

  • Native Token: MNT (Gas - paid by backend).

  • Game Currency: WMANTLE (Wrapped Mantle).

🛠️ Tech Stack

• Solidity

• ERC-20

• Next.js

• ethers.js

• WebSocket

• Mantle Network

🔗 Project Links

• 🕹️ Play the Game: https://mantle-three.vercel.app/

• 📡 Backend Status: https://mantle-o8d5.onrender.com

• 📜 Explorer: Mantle Sepolia Explorer