🔔 Analysis: Arbitrum freezes KelpDAO hacker’s ETH as a system-level transaction, injected via ArbOS by the Security Committee According to Huoxing Finance, on April 21, Dragonfly Managing Partner Haseeb Qureshi analyzed the event of “Arbitrum Security Committee freezing 30,766 ETH from the KelpDAO hacker,” stating that this transaction is of type 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 Committee. This action did not involve a chain rollback or historical rewrite; 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 Committee’s authority under “catastrophic emergency” scenarios as described in Arbitrum’s progressive decentralization documentation. https://t.co/blZeoPmxpR