#Unknown attacker causes headaches during Pectra upgrade on Sepolia

Ethereum’s recent Pectra test on the Sepolia fork encountered an issue that was made worse by an unknown user sending zero-token transfers.

An Ethereum developer says the recent Pectra upgrade of the Sepolia testnet ran into errors, which was made worse after an attacker used an “edge case” to cause the mining of empty blocks.

Pectra rolled out on its final testnet, Sepolia, at 7:29 am on March 5, but Ethereum developer Marius van der Wijden said in a March 8 post that the team immediately started seeing error messages on their geth node and empty blocks being mined.

The error was because the deposit contract triggered the wrong type of event — a transfer event instead of a deposit, according to Van der Wijden.

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