Simulate Before You Trade: Dry-Run APIs for High-Stakes DeFi Bots

Short summary

The article argues that DeFi trading bots need dry-run simulation APIs to test transactions against pending block state before committing on-chain. A proper simulation returns state deltas, event logs, and gas estimates without modifying chain state. The author emphasizes that simulation must be fast enough to fit within opportunity windows — for Solana arbitrage, that means sub-400ms latency with colocated infrastructure.

• •Dry-run APIs simulate full transaction execution without committing to chain state
• •Simulating against pending block state is critical for liquidation and arbitrage opportunities
• •Simulation latency must be minimal — colocated infrastructure needed for sub-400ms opportunity windows

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