Arbitrum khóa ETH của hacker thông qua giao dịch cấp hệ thống

The Huoxing Caijing report states that on April 21, Dragonfly managing partner Haseeb Qureshi analyzed the incident of Arbitrum Security Council freezing 30,766 ETH from the KelpDAO hacker, noting that this transaction type is ArbitrumUnsignedTxType (EIP-2718 type 0x65/101), a system-level transaction that cannot be signed by a regular EOA but can only be injected via ArbOS by the Arbitrum Security Council. This action did not involve a chain rollback or historical rewriting; functionally, it is a state-level recovery: the attacker’s private key can still sign transactions, but the ETH at that address has been transferred by the chain itself. This operation also demonstrates the Security Council’s authority under “catastrophic emergency” scenarios as described in Arbitrum’s progressive decentralization documentation.