Test Strategy Logic.
Review Before Live.
FRB's Simulation Mode forks mainnet state locally so you can review route logic, gas use, slippage, and failure paths before signing live transactions.
Local Forking
A local fork can reproduce a selected state for controlled testing; source RPC availability and state assumptions still apply.
P&L Analysis
Get detailed execution report breakdowns: swap slippage, gas costs (L1 + L2), and modeled net result for every simulated trade.
Strategy Backtesting
Replay past opportunities. Provide a transaction hash of a missed arb, and see if your configuration would have captured it.
Simulation FAQ
Do I need real funds to simulate?
No live funds are required for simulation. The simulator uses local impersonated accounts to test route logic and capital assumptions.
Does simulation predict live execution?
No. Simulation can model state and logic, but it cannot predict competing searchers, relay latency, builder inclusion, reorgs, RPC drift, or sudden liquidity changes.