{"id":17027,"date":"2025-10-15T20:03:18","date_gmt":"2025-10-15T18:03:18","guid":{"rendered":"https:\/\/wsj-crypto.com\/?p=17027"},"modified":"2025-10-15T20:03:18","modified_gmt":"2025-10-15T18:03:18","slug":"exciting-news-for-blob-users-the-latest-on-fusaka","status":"publish","type":"post","link":"https:\/\/wsj-crypto.com\/index.php\/2025\/10\/15\/exciting-news-for-blob-users-the-latest-on-fusaka\/","title":{"rendered":"Exciting News for Blob Users: The Latest on Fusaka!"},"content":{"rendered":"<p> &#8220;`html<br \/>\n<\/p>\n<div id=\"\">\n<p class=\"chakra-text css-gi02ar\">tl;dr: In recent days, several L2s observed that their deployments on Sepolia were no longer functioning properly. This is attributed to <!-- --><strong><a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-ug8vf0\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-7594\">EIP-7594<!-- --><\/a>, which modifies the structure for proofs<!-- --><\/strong>. In preparation for Fusaka, we urge all blob creators to upgrade their software to generate <!-- --><strong>Cell Proofs<!-- --><\/strong> instead of blob proofs.<!-- --><\/p>\n<p><!-- --><\/p>\n<h2 class=\"chakra-heading group css-5wg09l\" id=\"background\" data-group=\"true\"><a class=\"chakra-link css-njp5m2\" aria-label=\"background permalink\" href=\"#background\"><svg viewbox=\"0 0 24 24\" focusable=\"false\" class=\"chakra-icon css-173jpr1\"><g fill=\"currentColor\"><path d=\"M10.458,18.374,7.721,21.11a2.853,2.853,0,0,1-3.942,0l-.892-.891a2.787,2.787,0,0,1,0-3.941l5.8-5.8a2.789,2.789,0,0,1,3.942,0l.893.892A1,1,0,0,0,14.94,9.952l-.893-.892a4.791,4.791,0,0,0-6.771,0l-5.8,5.8a4.787,4.787,0,0,0,0,6.77l.892.891a4.785,4.785,0,0,0,6.771,0l2.736-2.735a1,1,0,1,0-1.414-1.415Z\"\/><path d=\"M22.526,2.363l-.892-.892a4.8,4.8,0,0,0-6.77,0l-2.905,2.9a1,1,0,0,0,1.414,1.414l2.9-2.9a2.79,2.79,0,0,1,3.941,0l.893.893a2.786,2.786,0,0,1,0,3.942l-5.8,5.8a2.769,2.769,0,0,1-1.971.817h0a2.766,2.766,0,0,1-1.969-.816,1,1,0,1,0-1.415,1.412,4.751,4.751,0,0,0,3.384,1.4h0a4.752,4.752,0,0,0,3.385-1.4l5.8-5.8a4.786,4.786,0,0,0,0-6.771Z\"\/><\/g><\/svg><\/a>Background<!-- --><\/h2>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">A less discussed feature of <!-- --><a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-ug8vf0\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-7594\">EIP-7549 (PeerDAS)<!-- --><\/a> involves altering the format for proofs from blob proofs to cell proofs. This enables the downloading of a specific section of the blob instead of the entire blob for data availability sampling.<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">This modification could disrupt user applications that issue blob transactions. Signed transactions remain valid, but they need to recompute the cell proofs. Certain clients (notably go-ethereum) will accomplish this through the RPC on <!-- --><span class=\"chakra-text css-ons8vw\">eth_sendTransaction<\/span> and <!-- --><span class=\"chakra-text css-ons8vw\">eth_sendRawTransaction<\/span> (1). The conversion from blob proofs to cell proofs takes roughly one second; hence, we encourage blob transaction creators to transition to cell proofs to minimize overhead at the RPC level.<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">Transactions present in the txpool during the fork may be discarded by some implementations, whereas others may transform them into cell proofs. Therefore, it would be wise to resend your transactions with cell proofs soon after the fork if they aren&#8217;t being incorporated into the chain. Some implementations permit the dissemination of blob proof transactions up to a few minutes post-hard fork on the network layer for stability reasons.<!-- --><\/p>\n<p><!-- --><\/p>\n<h2 class=\"chakra-heading group css-5wg09l\" id=\"actionable-changes\" data-group=\"true\"><a class=\"chakra-link css-njp5m2\" aria-label=\"actionable changes permalink\" href=\"#actionable-changes\"><svg viewbox=\"0 0 24 24\" focusable=\"false\" class=\"chakra-icon css-173jpr1\"><g fill=\"currentColor\"><path d=\"M10.458,18.374,7.721,21.11a2.853,2.853,0,0,1-3.942,0l-.892-.891a2.787,2.787,0,0,1,0-3.941l5.8-5.8a2.789,2.789,0,0,1,3.942,0l.893.892A1,1,0,0,0,14.94,9.952l-.893-.892a4.791,4.791,0,0,0-6.771,0l-5.8,5.8a4.787,4.787,0,0,0,0,6.77l.892.891a4.785,4.785,0,0,0,6.771,0l2.736-2.735a1,1,0,1,0-1.414-1.415Z\"\/><path d=\"M22.526,2.363l-.892-.892a4.8,4.8,0,0,0-6.77,0l-2.905,2.9a1,1,0,0,0,1.414,1.414l2.9-2.9a2.79,2.79,0,0,1,3.941,0l.893.893a2.786,2.786,0,0,1,0,3.942l-5.8,5.8a2.769,2.769,0,0,1-1.971.817h0a2.766,2.766,0,0,1-1.969-.816,1,1,0,1,0-1.415,1.412,4.751,4.751,0,0,0,3.384,1.4h0a4.752,4.752,0,0,0,3.385-1.4l5.8-5.8a4.786,4.786,0,0,0,0-6.771Z\"\/><\/g><\/svg><\/a>Actionable changes<!-- --><\/h2>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">Should you be a blob transaction creator (e.g., an L2), it is essential to modify your transaction sending code to produce cell proofs.<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">All significant client libraries provide functionality to create these proofs through <!-- --><span class=\"chakra-text css-ons8vw\">ComputeCellsAndKZGProofs()<\/span>, which is accessible in all major languages (2). Usage examples are also available in all major languages within the client libraries (3).<!-- --><\/p>\n<p><!-- --><\/p>\n<h2 class=\"chakra-heading group css-5wg09l\" id=\"outlook\" data-group=\"true\"><a class=\"chakra-link css-njp5m2\" aria-label=\"outlook permalink\" href=\"#outlook\"><svg viewbox=\"0 0 24 24\" focusable=\"false\" class=\"chakra-icon css-173jpr1\"><g fill=\"currentColor\"><path d=\"M10.458,18.374,7.721,21.11a2.853,2.853,0,0,1-3.942,0l-.892-.891a2.787,2.787,0,0,1,0-3.941l5.8-5.8a2.789,2.789,0,0,1,3.942,0l.893.892A1,1,0,0,0,14.94,9.952l-.893-.892a4.791,4.791,0,0,0-6.771,0l-5.8,5.8a4.787,4.787,0,0,0,0,6.77l.892.891a4.785,4.785,0,0,0,6.771,0l2.736-2.735a1,1,0,1,0-1.414-1.415Z\"\/><path d=\"M22.526,2.363l-.892-.892a4.8,4.8,0,0,0-6.77,0l-2.905,2.9a1,1,0,0,0,1.414,1.414l2.9-2.9a2.79,2.79,0,0,1,3.941,0l.893.893a2.786,2.786,0,0,1,0,3.942l-5.8,5.8a2.769,2.769,0,0,1-1.971.817h0a2.766,2.766,0,0,1-1.969-.816,1,1,0,1,0-1.415,1.412,4.751,4.751,0,0,0,3.384,1.4h0a4.752,4.752,0,0,0,3.385-1.4l5.8-5.8a4.786,4.786,0,0,0,0-6.771Z\"\/><\/g><\/svg><\/a>Outlook<!-- --><\/h2>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">We aim to communicate these user-impacting changes more explicitly through the Ethereum blog moving forward and to enhance community outreach to prevent Ethereum users from feeling unprepared for adjustments in the protocol.<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">We additionally encourage L2s and other stakeholders that rely heavily on the Ethereum roadmap to adhere to the ACD process and engage more directly with the community. We hope to motivate teams to launch their contracts and test infrastructure on the devnets shortly before transitioning to the initial testnets. Another useful resource for staying updated with your changes is utilizing the Ethereum package offered by Kurtosis, which facilitates the creation of local networks with the latest specifications (4).<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">While it is regrettable that blob creators discovered this late in the hard fork process, it illustrates that the testnet procedure is working effectively and these concerns are identified well before they have the opportunity to surface on mainnet.<!-- --><\/p>\n<p><!-- --><\/p>\n<p class=\"chakra-text css-gi02ar\">(1): go-ethereum will only perform the conversion on <!-- --><span class=\"chakra-text css-ons8vw\">eth_sendRawTransaction<\/span> from current master and v1.16.5 onward <!-- --><br \/>(2): see <!-- --><a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-ug8vf0\" href=\"https:\/\/github.com\/search?q=repo%3Aethereum%2Fc-kzg-4844%20ComputeCellsAndKZGProofs&amp;type=code\">https:\/\/github.com\/search?q=repo%3Aethereum%2Fc-kzg-4844%20ComputeCellsAndKZGProofs&amp;type=code<!-- --><\/a> <!-- --><br \/>(3) Example for go-ethereum: <!-- --><a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-ug8vf0\" href=\"https:\/\/github.com\/ethereum\/go-ethereum\/blob\/7c107c2691fa66a1da60e2b95f5946c3a3921b00\/crypto\/kzg4844\/kzg4844_test.go#L194\">https:\/\/github.com\/ethereum\/go-ethereum\/blob\/7c107c2691fa66a1da60e2b95f5946c3a3921b00\/crypto\/kzg4844\/kzg4844_test.go#L194<!-- --><\/a> <!-- --><br \/>(4) Ethereum package for kurtosis: <!-- --><a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-ug8vf0\" href=\"https:\/\/github.com\/ethpandaops\/ethereum-package\">https:\/\/github.com\/ethpandaops\/ethereum-package<!-- --><\/a><\/p>\n<\/div>\n<p><br \/>\n<br \/><a href=\"https:\/\/blog.ethereum.org\/en\/2025\/10\/15\/fusaka-blob-update\">Source link <\/a><br \/>\n&#8220;`<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`html tl;dr: In recent days, several L2s observed that their deployments on Sepolia were no longer functioning properly. This is attributed to EIP-7594, which modifies the structure for proofs. In preparation for Fusaka, we urge all blob creators to upgrade their software to generate Cell Proofs instead of blob proofs. Background A less discussed feature<\/p>\n","protected":false},"author":3,"featured_media":8282,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[3920],"class_list":{"0":"post-17027","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-ethereum","8":"tag-return-a-list-of-comma-separated-tags-from-this-title-fusaka-update-information-for-blob-users"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Exciting News for Blob Users: The Latest on Fusaka! - WSJ-Crypto<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wsj-crypto.com\/index.php\/2025\/10\/15\/exciting-news-for-blob-users-the-latest-on-fusaka\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exciting News for Blob Users: The Latest on Fusaka! - WSJ-Crypto\" \/>\n<meta property=\"og:description\" content=\"&#8220;`html tl;dr: In recent days, several L2s observed that their deployments on Sepolia were no longer functioning properly. 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