Antigravity — Autonomous DeFi Agent

🏆 Built for The Synthesis hackathon | AI agents and humans building together

An autonomous DeFi agent on Base that executes intelligent token swaps via the Uniswap API, runs as a discoverable agent service with x402 payments, and provides real-time portfolio monitoring through a premium web dashboard.

🎯 Target Tracks

• Agentic Finance (Best Uniswap API Integration) — Uniswap
• Agent Services on Base — Base
• Synthesis Open Track — Community
• Student Founder's Bet — College.xyz

🏗 Architecture

├── contracts/          # Solidity smart contracts (Hardhat)
│   ├── AgentVault.sol        — Agent treasury with spending limits
│   └── AgentRegistry.sol     — On-chain agent service registry
├── agent/              # Node.js autonomous agent
│   ├── uniswap/              — Uniswap V3 integration
│   ├── strategies/           — Trading strategies (momentum)
│   └── index.ts              — Main trading loop
└── web/                # Next.js monitoring dashboard
    └── Premium dark-mode UI with real-time updates

🚀 Quick Start

# Install dependencies
npm install

# Compile contracts
npm run contracts:compile

# Run contract tests
npm run contracts:test

# Start agent (requires deployed contracts + private key)
npm run agent:dev

# Start web dashboard
npm run web:dev

🔑 Key Features

Feature	Description
AgentVault	Smart contract enforcing per-tx and daily spending limits with whitelisted DEX routers
Momentum Strategy	Moving average crossover detection with confidence scoring
Uniswap V3 Integration	Real-time quotes and swap execution on Base Sepolia
x402 Agent Services	On-chain registry for discoverable, payable agent services
ERC-8004 Identity	On-chain agent identity linked to all actions
Premium Dashboard	Real-time monitoring with live prices, trade history, and portfolio tracking

🔒 Security

• Per-transaction spending limits (configurable)
• Daily spending caps with 24h rolling window
• Whitelisted DEX routers only
• Emergency pause mechanism
• Non-custodial — agent owner retains full control

📜 Smart Contracts

AgentVault

• Holds agent funds (ETH + ERC-20 tokens)
• Enforces spending limits
• Routes swaps through whitelisted DEX routers (Uniswap)
• Emergency pause/unpause

AgentRegistry

• On-chain registry for agent services
• x402-compatible payment handling
• Service discovery for other agents
• Tracks lifetime calls and earnings

🤖 Agent Details

• Name: Antigravity
• Harness: Cursor
• Model: Gemini 2.5 Pro
• Framework: Custom TypeScript agent
• Chain: Base Sepolia (testnet)

👤 Team

• Human: Pankaj (@codepankajpy) — 2nd year student, web2/web3 builder
• Agent: Antigravity — Autonomous DeFi agent

📄 License

MIT