Longbow

Perpetual futures DEX built on Robinhood Chain Testnet for the hackathon.

Trade synthetic stocks (TSLA, AMZN, PLTR, AMD, NFLX) and ETH with leverage, using USDC as collateral.

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What it does

• Open long/short positions on stock synthetics with up to 10x leverage
• Deposit USDC collateral, track PnL in real-time
• Prices simulated via GBM, pushed to an on-chain oracle every 15s
• Liquidations and funding rate settlement built into the core contract
• Admin page for live demo price updates

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Code structure

contracts/
  src/
    MockUSDC.sol      — Faucet token (mint 100K USDC per call)
    MockOracle.sol    — Owner-updatable price feed (18 decimals)
    LongbowCore.sol   — Main perp engine: deposit/withdraw/open/close/liquidate

frontend/
  src/app/
    page.tsx          — Landing page
    app/page.tsx      — Trading UI (charts, positions, order panel)
    admin/            — Price control panel for demo

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Deployed contracts (Robinhood Chain Testnet, Chain ID 46630)

Contract	Address
MockUSDC	0x21ceBFDCd8268E430c7F71fE684f7943d0dF875d
MockOracle	0x216D6A6cC1798BDb63e1b946FeBd710252A854B1
LongbowCore	0x6b1040c15eE2685370310C79C00B43910b6Db946

Explorer: https://explorer.testnet.chain.robinhood.com

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Run locally

# Contracts
cd contracts
forge test          # 26/26 tests pass
forge build

# Frontend
cd frontend
cp .env.example .env.local   # fill in contract addresses
npm install
npm run dev                   # http://localhost:3000

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Stack

• Contracts: Foundry / Solidity 0.8.24
• Frontend: Next.js 15, Tailwind, wagmi v2, Privy, lightweight-charts