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Trading Interface

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Architecture

The Lemon Trading Engine is built on the SyntheticPerpetualWithVmarkets smart contract, designed for performance and security.

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1. Frontend (UI)

The interface you interact with. It handles:
  • Wallet connection.
  • Data visualization (Charts, Tables).
  • Transaction preparation.

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2. Execution Layer (API)

When you submit an order, our API:
  1. Validates your request (margin, leverage, asset).
  2. Simulates the transaction to ensure it will succeed.
  3. Constructs the transaction data.
  4. Sends it back to your wallet for signature.

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3. Smart Contracts (Onchain)

The core logic is modular and distributed across several key contracts on the Base blockchain:
  • SyntheticPerpetualRouter: The primary user entry point for orchestrating trades.
  • MarketManager: The Brain that manages the registry of markets and coordinates the payout waterfall.
  • PositionManager: An ERC-721 contract that manages the position lifecycle and NFT encapsulation.
  • Vault: The liquidity layer managing the Buffer Pool and Insurance Pool.
  • Market Instances: Lightweight contracts for specific asset pairs (e.g., BTC, ETH).

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Trading Parameters

To ensure market stability and risk management, the following limits are enforced:
ParameterValue
Minimum Margin1 USDC
Maximum Margin1,000,000 USDC
Minimum Leverage1x
Maximum Leverage100x
Opening Fee0.20% (20 bps)
Liquidation Threshold80%
Leverage limits may vary depending on the specific asset’s volatility and liquidity profile.

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Supported Assets

Currently, Lemon Markets supports a wide range of Crypto pairs. We are actively developing support for:
  • Forex (e.g., EUR/USD, JPY/USD)
  • Commodities (e.g., Gold, Oil)
  • Stocks (e.g., AAPL, TSLA)
All assets are traded against USDC.