Enso Says Some DeFi Liquidity Pools Can Fool Transaction Simulations

DeFi infrastructure firm Enso says some liquidity pools can fool transaction simulations, producing preview outcomes that do not match what actually settles on-chain. The warning targets a blind spot in the tooling traders and apps rely on to estimate the result of a swap before they sign it. Enso's research describes what it calls "toxic pools," undocumented or malicious liquidity pools that behave differently during a simulation than during real execution, according to the firm's write-up. The gap means a user can be shown a favorable quote and still receive a worse trade. For related coverage, see Best NFT Minting Tools in 2026: 7 Platforms for Fast, Flexible Launches. Transaction simulation is the practice of running a pending trade against current chain state to preview its expected output, such as the tokens received and the price impact. The technique underpins slippage warnings and routing decisions across DeFi front ends. Enso frames the problem as the quote you see not being the trade you get, the theme of a related post from the team. For related coverage, see South Korea Raises Base Rate to 2.75%, Pressuring Crypto Risk Appetite. The mechanism, as Enso describes it, is that certain pool contracts can detect or respond to the conditions of a simulated call and return a different result than they would in a live transaction. That divergence lets a pool present itself as safe to preview tools while executing on less favorable terms. For related coverage, see SEC approves higher options position limits for BlackRock's IBIT Bitcoin ETF. Independent coverage from CCN reported that Enso's research uncovered undocumented, malicious liquidity pools, describing the category as "toxic pools." For related coverage, see SBI and DigiFT Launch Tokenized Japan Equity Fund on Solana. Why Misleading Simulations Matter for Traders If a simulation can be gamed, the safety checks built on top of it inherit the flaw. Slippage estimates, price-impact figures, and execution previews all become unreliable when a pool can respond differently to a preview than to a real swap. The practical risk falls on end users and the interfaces that route their orders. Aggregators and front ends that surface simulated outcomes may need to review how they present those estimates and when to flag them as unverifiable. DeFi execution tooling has expanded quickly as protocols scale, with lending markets like Aave's V4 rollout onto new chains widening the surface where routing and simulation logic operate. TLDR KEYPOINTS Enso says some DeFi liquidity pools can return different results in a simulation than in a live trade. That mismatch can undermine slippage and price-impact estimates users rely on before signing. Front ends and aggregators that display simulated outcomes may need clearer warnings about reliability.