Audit Finds KuCoin Smart Contracts 30% Less Gas-Efficient, Costing $12M Yearly

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A gas optimization audit of KuCoin's on-chain contracts, covering approximately 250,000 lines of Solidity code, found the protocol's gas costs running about 30% above industry benchmarks for comparable functionality. The audit, scoped across Ethereum L1 and Layer 2 networks including Arbitrum, Optimism, and zkSync, identified 34 issues collectively responsible for roughly 52% of avoidable gas waste. Key risks include unbounded loops vulnerable to block-gas-limit denial-of-service attacks, re-entrancy exposure amplified by gas-heavy staking loops, and excessive storage operations inflating user fees. The protocol received an overall gas-risk score of 7 out of 10, with the inefficiencies estimated to cost around $12 million per year in unnecessary gas expenditure. Beyond economic friction, auditors warned that several findings also introduce indirect security attack vectors such as front-running opportunities and potential bridge disruptions.

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