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Ethereum developers have warned of a potential attack on the Sepolia testnet during testing for the Glamsterdam upgrade that could disrupt block production. While the attack wouldn’t directly affect user funds on the Ethereum mainnet, it could hinder testing of the Glamsterdam infrastructure and the evaluation of related features.
In this scenario, the attacker could potentially gain an advantage over block bids by using testnet ETH, which is available for free on the Sepolia test network. It’s also suggested that the attacker could use a one-time builder ID to win block bids on Sepolia and then refuse to send the actual transaction data to the block.
Such a situation could disrupt the block production process on the test network. Ethereum developers say the primary risk is not that the attack threatens actual assets on the main network, but rather that it could affect the reliability and continuity of the tests being conducted for the Glamsterdam upgrade.
Glamsterdam is considered a crucial stage in the future development process of the Ethereum network. Various tests are being conducted on test networks to verify that the different infrastructure components related to the upgrade are functioning securely and stably.
According to the details of the news, the public testing process on Sepolia is scheduled to begin on October 6th. Tests on Hoodi, another Ethereum test network, are expected to begin temporarily on October 27th.
However, it is not yet certain when the Glamsterdam upgrade will be implemented on the Ethereum mainnet. The results that developers obtain from the testing processes and assessments of the infrastructure’s stability will be influential in determining the mainnet schedule.
The potential attack scenario also highlights the importance of test networks in the technical preparations before an upgrade.
*This is not investment advice.