Bitkub Gas Audit Finds Savings of Around $1.2M Daily and Flags DoS Risks

A gas-efficiency audit of Bitkub's DeFi smart contracts, which hold roughly $1.52 billion in total value locked across Ethereum and Layer 2 networks, has been published. The review examined the v2.3.1 mainnet deployment and its Arbitrum Nova and Optimism implementations, covering about 120,000 lines of Solidity code. Auditors identified redundant storage operations, inefficient array handling, and poor external-call patterns as the main sources of excess gas costs. Implementing the high-priority recommendations could cut daily gas spending by an estimated $1.2 million, or about 12 percent. The auditors also warned that unbounded loops and gas-griefing vectors could enable denial-of-service attacks or front-running under heavy network load, giving the protocol a risk score of 4 out of 10.