0x01 What is ERC-721？ ERC is an abbreviation of Ethereum Request for Comment, and 721 is the proposal identifier number.ERCs are application-level standards in the Ethereum ecosystem, they can be a smart contract standard for tokens such as ERC-20, the author of an ERC is responsible for building consensus with…

Lunaray Security Team Officially Launches Security Bounty Service, we will officially provide free bounty services for the projects that we have been served before, aims to continue to contribute to the security of blockchain to ensure all the projects can run safely and smoothly. It is reported that white hat…

According to Lunaray Security Team, the Token contract security scanning platform has completed the automatic security scan of the OHM V1 Token contract and the security risk level is Low. The scan result is only for general security vulnerabilities and is not used as the final contract security audit result…

0x01 Event background On May 18, the Feminist Metaverse smart contract on the Binance chain was attacked by a smart contract. Lost funds worth more than $550,000. 0x02 Attacker Information Attacker wallet：0xaaA1634D669dd8aa275BAD6FdF19c7E3B2f1eF50 Attacker contract：0x0b8d752252694623766dfb161e1944f233bca10f Attacker trancation：0xecde3c3742615852abdbd6ec5d75ae982b5c29f810e140e5cd822667d6f7b848 FmToken contract：0x843528746F073638C9e18253ee6078613C0df0f1

According to Lunaray Security Team, the Token contract security scanning platform has completed the automatic security scan of the (SAC) Token contract and the security risk level is Low. The scan result is only for general security vulnerabilities and is not used as the final contract security audit result, nor…

NFT’s contract (ERC721) and how NFT implements transactions on OpenSea 0x01 NFT and ERC721 For NFT, it is actually a specification defined by the Ethereum Association, that is, ERC721. Its function is the same as the ERC20 specification of Fungible Token. Through this specification, the interface is unified, so that various types of tokens…

According to Lunaray Security Team, the Token contract security scanning platform has completed the automatic security scan of the RONIN Token contract and the security risk level is Low. The scan result is only for general security vulnerabilities and is not used as the final contract security audit result, nor…

According to Lunaray Security Team, the Token contract security scanning platform has completed the automatic security scan of the CRYPTOPUNKS Token contract and the security risk level is Low. The scan result is only for general security vulnerabilities and is not used as the final contract security audit result, nor…

0x01 Event background — Fortress Loans attacked on May 9, 2022. Fortress- Decentralized Lending & Stablecoin Protocol Fortress is a decentralized finance lending and stablecoin protocol on BSC. At present, the project has lost about 1048.1 ETH and 400,000 DAI (total value of about 2.98 million US dollars). 0x02 Attack information Attacker’s main exploit transaction 0x13d19809b19ac512da6d110764caee75e2157ea62cb70937c8d9471afcb061bf