KlayHub’s Token Audit
Date Issued : Nov 12, 2021
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Date Issued : Nov 12, 2021
As requested by the KlayHub team, S2W conducted an audit to evaluate the security of KlayHub’s token contracts from Nov 8 to 12. During the audit, we have carefully analyzed the workflows of all contracts in the scope to understand how the contracts were designed. The audit covered token contracts of KlayHub including both FT and NFT for the Klaytn blockchain(i.e., KIP7.sol and KIP17.sol from github repositories). We ensure that this audit was conducted in professional and sophisticated ways with state of the art methods for code analysis (e.g., symbolic execution, fussing) to discover security vulnerabilities and expose possible semantic inconsistencies between the implementation and the design of smart contracts.
From the assessments, S2W has uncovered no security issue that may have correctness or security impacts but, there were two minor considerations for better gas usage and code safety which did not impose any immediate security impacts.
On the whole, the given smart contracts were well reasoned and engineered. Most of them have been already published as the libraries on the official github organization of Klaytn(ref. https://github.com/klaytn/klaytn-contracts) to help build blockchain applications on Klaytn. In addition, some implementations were derived from openzepplin contracts which is one of the most popular open-source libraries for secure smart contract development.
Note that the scope of this audit is not a major part of the KlayHub DeFi services. We suggest conducting audits for the rest of the system as well to lessen the security risks.