• Fusaka Update - Information for Blob users Posted by Marius van der Wijden on October 15, 2025 Research & Development tl;dr: Over the last couple of days, some L2s noticed that their deployments on Sepolia didn’t work properly anymore. • This is due toEIP-7594which changes the format for proofs. • In anticipation of Fusaka, we urge all blob originators to update their software to createCell Proofsinstead of blob proofs. • Background One underdiscussed aspect ofEIP-7594 (PeerDAS)is that it changes the format for proofs from blob proofs to cell proofs. • This allows for downloading a specific part of the blob instead of the whole blob for data availability sampling. • This change might break user applications that send blob transactions.
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- tl;dr: Over the last couple of days, some L2s noticed that their deployments on Sepolia didn’t work properly anymore. This is due to EIP-7594 which changes the format for proofs. In anticipation of Fusaka, we urge all blob originators to update their software to create Cell Proofs instead of blob proofs. Background One underdiscussed aspect of EIP-7594 (PeerDAS) is that it changes the format for proofs from blob proofs to cell proofs. This allows for downloading a specific part of the blob instead of the whole blob for data availability sampling. This change might break user applications that
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