Module simulation 

Simulation Layer: Shared margin-aware accounting for paper trading and backtesting.

This module provides accurate perpetual futures simulation including:

• Per-instrument isolated margin positions
• Margin-aware order admission (instead of full-notional checks)
• Proper fill settlement with margin reserve/release
• Unrealized PnL tracking at mark prices
• Liquidation price computation

Used by PaperExchange to provide realistic simulation that matches how Hyperliquid actually handles margin and positions.

Note: This module is ONLY used in the simulation path (paper/backtest). Live trading uses the real exchange which handles all margin math server-side.

Re-exports

pub use account::IsolatedPosition;

pub use account::MarginLedger;

Modules

account

Isolated margin accounting for simulated perpetual futures.