{"id":17741,"date":"2026-02-27T21:55:43","date_gmt":"2026-02-27T21:55:43","guid":{"rendered":"https:\/\/cryptoted.net\/index.php\/2026\/02\/27\/sepolia-holesky-dencun-announcement\/"},"modified":"2026-02-27T21:55:43","modified_gmt":"2026-02-27T21:55:43","slug":"sepolia-holesky-dencun-announcement","status":"publish","type":"post","link":"https:\/\/cryptoted.net\/index.php\/2026\/02\/27\/sepolia-holesky-dencun-announcement\/","title":{"rendered":"Sepolia &#038; Holesky Dencun Announcement"},"content":{"rendered":"<p> <br \/>\n<br \/><img decoding=\"async\" src=\"https:\/\/storage.googleapis.com\/ethereum-hackmd\/upload_5f7b49ceccd26dd121224fe4688f175a.jpeg\" \/><\/p>\n<div id=\"\">\n<p class=\"chakra-text css-gi02ar\"><strong>Important update:<\/strong> since the initial publication of this post, Lodestar has published a new release, <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/ChainSafe\/lodestar\/releases\/tag\/v1.15.0\">v1.15.0<\/a>, which Holesky users must upgrade to prior to Dencun&#8217;s activation on February 7th. Additionally, Prysm and Nimbus have both published highly recommended releases for Holesky. Prysm users are encouraged to use <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/prysmaticlabs\/prysm\/releases\/tag\/v4.2.1\">v4.2.1<\/a>, and Nimbus users <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/status-im\/nimbus-eth2\/releases\/tag\/v24.2.0\">v24.2.0<\/a>.<\/p>\n<hr aria-orientation=\"horizontal\" class=\"chakra-divider css-1e6gg7n\"\/>\n<ul role=\"list\" class=\"css-1ars4k6\">\n<li class=\"css-0\"><strong>Goerli blobs are here:<\/strong> Dencun went live on Goerli at 6:32 UTC on January 17, 2024. You can now use blobs there!<\/li>\n<li class=\"css-0\"><strong>Sepolia and Holesky will upgrade over the next two weeks.<\/strong> Dencun will activate on Sepolia at epoch <span class=\"chakra-text css-ons8vw\">132608<\/span> (January 30th, 22:51 UTC), and on Holesky at epoch <span class=\"chakra-text css-ons8vw\">29696<\/span> (February 7th, 11:35 UTC).<\/li>\n<li class=\"css-0\">Client releases in this announcement are suitable for both testnet upgrades.<\/li>\n<li class=\"css-0\">Assuming the Sepolia and Holesky upgrades go well, Dencun will be scheduled on the Ethereum mainnet next.<\/li>\n<li class=\"css-0\">To receive an email alert for network upgrade announcements, including the Dencun mainnet one, subscribe <a class=\"chakra-link css-vezwxf\" href=\"http:\/\/blog.ethereum.org\/2024\/01\/24\/sepolia-holesky-dencun#subscribe\">here<\/a>.<\/li>\n<\/ul>\n<hr aria-orientation=\"horizontal\" class=\"chakra-divider css-1e6gg7n\"\/>\n<p class=\"chakra-text css-gi02ar\">The Dencun network upgrade has successfully activated on the Goerli testnet on January 17, 2024. It is now scheduled for the two remaining testnets, Sepolia and Holesky, at the following times:<\/p>\n<p class=\"chakra-text css-gi02ar\">The upgrade includes several changes, most notably the introduction of ephemeral data blobs with EIP-4844, also known as &#8220;protodanksharding&#8221;, which will help reduce L2 transaction fees.<\/p>\n<p class=\"chakra-text css-gi02ar\">Dencun follows last year&#8217;s <a class=\"chakra-link css-vezwxf\" href=\"https:\/\/blog.ethereum.org\/2023\/03\/28\/shapella-mainnet-announcement\">Shapella upgrade<\/a>. It will first be deployed to Ethereum testnets. Once these all are smoothly running the upgrade, Dencun will be scheduled for deployment on the Ethereum mainnet.<\/p>\n<h2 class=\"chakra-heading group css-1kpzc4q\" id=\"upgrade-specification\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"upgrade specification permalink\" href=\"#upgrade-specification\"><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>Upgrade Specification<\/h2>\n<p class=\"chakra-text css-gi02ar\">The Dencun upgrade combines changes to both Ethereum&#8217;s consensus and execution layers. The full list of protocol changes can be found in <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-7569\">EIP-7569<\/a>. For reference, they are:<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"deneb\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"deneb permalink\" href=\"#deneb\"><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>Deneb<\/h3>\n<p class=\"chakra-text css-gi02ar\">Complete python specifications for changes affecting Ethereum&#8217;s consensus layer can be found in the <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/ethereum\/consensus-specs\/tree\/dev\/specs\/deneb\"><span class=\"chakra-text css-ons8vw\">deneb<\/span> folder<\/a> of the <span class=\"chakra-text css-ons8vw\">ethereum\/consensus-specs<\/span> repository.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"cancun\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"cancun permalink\" href=\"#cancun\"><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>Cancun<\/h3>\n<p class=\"chakra-text css-gi02ar\">The EIPs linked above contain the full specifications for changes affecting Ethereum&#8217;s execution layer.<\/p>\n<p class=\"chakra-text css-gi02ar\">Additionally, a python specification for these is being implemented in the <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/ethereum\/execution-specs\/pulls?q=is%3Apr+base%3Aforks%2Fcancun\"><span class=\"chakra-text css-ons8vw\">ethereum\/execution-specs<\/span> repository<\/a>.<\/p>\n<p class=\"chakra-text css-gi02ar\">Lastly, Deneb requires changes to the Engine API, used for communication between the consensus and execution layer nodes. These are specified in the <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/ethereum\/execution-apis\/blob\/main\/src\/engine\/cancun.md\"><span class=\"chakra-text css-ons8vw\">cancun.md<\/span> file<\/a> of the <span class=\"chakra-text css-ons8vw\">ethereum\/execution-apis<\/span> repository.<\/p>\n<h2 class=\"chakra-heading group css-1kpzc4q\" id=\"client-releases\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"client releases permalink\" href=\"#client-releases\"><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>Client Releases<\/h2>\n<p class=\"chakra-text css-gi02ar\">The following client releases support Dencun on <strong>both Sepolia and Holesky<\/strong>. Further versions will activate support on mainnet. Once these are released, another announcement will be made on this blog.<\/p>\n<p class=\"chakra-text css-gi02ar\">When choosing which client to run, validators should be especially mindful of the risks of running a majority client on either the execution layer (EL) or consensus layer (CL). An explainer of these risks and their consequences can be found <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/dankradfeist.de\/ethereum\/2022\/03\/24\/run-the-majority-client-at-your-own-peril.html\">here<\/a>. An estimate of current EL and CL client distribution and guides for switching from one client to another can be found <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/clientdiversity.org\/\">here<\/a>.<\/p>\n<h4 class=\"chakra-heading group css-qm6a1\" id=\"consensus-layer-sepolia--holesky-releases\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"consensus layer sepolia  holesky releases permalink\" href=\"#consensus-layer-sepolia--holesky-releases\"><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>Consensus Layer Sepolia &amp; Holesky Releases<\/h4>\n<p class=\"chakra-text css-gi02ar\"><strong>Notes<\/strong>:<\/p>\n<ul role=\"list\" class=\"css-1ars4k6\">\n<li class=\"css-0\">Holesky Lodestar v1.15.0-rc.0 users <strong>must<\/strong> upgrade to v1.15.0.<\/li>\n<li class=\"css-0\">Holesky Nimbus v24.1.2 users are highly encouraged to upgrade to v24.2.0.<\/li>\n<li class=\"css-0\">Holesky Prysm v4.2.1-rc.1 users are highly encouraged to upgrade to v4.2.1.<\/li>\n<li class=\"css-0\">When running a validator, both the Consensus Layer Beacon Node and Validator Client must be updated.<\/li>\n<\/ul>\n<h4 class=\"chakra-heading group css-qm6a1\" id=\"execution-layer-sepolia--holesky-releases\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"execution layer sepolia  holesky releases permalink\" href=\"#execution-layer-sepolia--holesky-releases\"><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>Execution Layer Sepolia &amp; Holesky Releases<\/h4>\n<p class=\"chakra-text css-gi02ar\"><strong>Note<\/strong>: while Reth supports Dencun, the client is still pending a full audit and is <strong>not recommended for production use<\/strong>. See the <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/github.com\/paradigmxyz\/reth?tab=readme-ov-file#status\">Reth README<\/a> for more context.<\/p>\n<h2 class=\"chakra-heading group css-1kpzc4q\" id=\"faq\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"faq permalink\" href=\"#faq\"><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>FAQ<\/h2>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"as-an-ethereum-user-or-ether-holder-is-there-anything-i-need-to-do\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"as an ethereum user or ether holder is there anything i need to do permalink\" href=\"#as-an-ethereum-user-or-ether-holder-is-there-anything-i-need-to-do\"><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>As an Ethereum user or Ether holder, is there anything I need to do?<\/h3>\n<p class=\"chakra-text css-gi02ar\">In short, no.<\/p>\n<p class=\"chakra-text css-gi02ar\">If you use an exchange, digital wallet or hardware wallet you do not need to do anything unless you are informed to take additional steps by your exchange or wallet provider.<\/p>\n<p class=\"chakra-text css-gi02ar\">If you run your own Ethereum node, see the next question.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"as-a-non-staking-sepolia-or-holesky-node-operator-what-do-i-need-to-do\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"as a non staking sepolia or holesky node operator what do i need to do permalink\" href=\"#as-a-non-staking-sepolia-or-holesky-node-operator-what-do-i-need-to-do\"><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>As a non-staking <strong>Sepolia or Holesky<\/strong> node operator, what do I need to do?<\/h3>\n<p class=\"chakra-text css-gi02ar\">To be compatible with the upgrade on either testnet, update your node&#8217;s execution and consensus layer clients to the versions listed in the table above.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"as-a-sepolia-or-holesky-staker-what-do-i-need-to-do\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"as a sepolia or holesky staker what do i need to do permalink\" href=\"#as-a-sepolia-or-holesky-staker-what-do-i-need-to-do\"><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>As a <strong>Sepolia or Holesky<\/strong> staker, what do I need to do?<\/h3>\n<p class=\"chakra-text css-gi02ar\">To be compatible with the upgrade on either testnet, update your node&#8217;s execution and consensus layer clients to the versions listed in the table above. <strong>Make sure both your beacon node and validator client are updated.<\/strong><\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"as-a-non-sepolia-or-holesky-node-operator-or-staker-what-do-i-need-to-do\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"as a non sepolia or holesky node operator or staker what do i need to do permalink\" href=\"#as-a-non-sepolia-or-holesky-node-operator-or-staker-what-do-i-need-to-do\"><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>As a non-Sepolia or Holesky node operator or staker, what do I need to do?<\/h3>\n<p class=\"chakra-text css-gi02ar\">Nothing for now. Further announcements will be made for Dencun&#8217;s activation on mainnet. You can sign up to receive an email alert for them <a class=\"chakra-link css-vezwxf\" href=\"http:\/\/blog.ethereum.org\/2024\/01\/24\/sepolia-holesky-dencun#subscribe\">here<\/a>.<\/p>\n<p class=\"chakra-text css-gi02ar\">Stakers who want to run through the upgrade process more times before mainnet are encouraged to use <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/ephemery.dev\/\">ephemery.dev<\/a>, which now supports Dencun.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"what-happens-if-i-am-a-sepolia-or-holesky-staker-or-node-operator-and-i-do-not-participate-in-the-upgrade\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"what happens if i am a sepolia or holesky staker or node operator and i do not participate in the upgrade permalink\" href=\"#what-happens-if-i-am-a-sepolia-or-holesky-staker-or-node-operator-and-i-do-not-participate-in-the-upgrade\"><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>What happens if I am a Sepolia or Holesky staker or node operator and I do not participate in the upgrade?<\/h3>\n<p class=\"chakra-text css-gi02ar\">If you are using an Ethereum client that is not updated to the latest version (listed above), your client will sync to the pre-fork blockchain once the upgrade occurs.<\/p>\n<p class=\"chakra-text css-gi02ar\">You will be stuck on an incompatible chain following the old rules and will be unable to send Ether or operate on the post-Dencun Ethereum network.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"as-an-application-or-tooling-developer-what-should-i-do\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"as an application or tooling developer what should i do permalink\" href=\"#as-an-application-or-tooling-developer-what-should-i-do\"><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>As an application or tooling developer, what should I do?<\/h3>\n<p class=\"chakra-text css-gi02ar\">Review the EIPs included in Dencun to determine if and how they affect your project &#8212; there are many new exciting features being introduced across both the execution and consensus layers! The only EIPs with backwards compatibility implications are <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-6780\">EIP-6780<\/a>, <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-7044\">EIP-7044<\/a> and <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/eips.ethereum.org\/EIPS\/eip-7514\">EIP-7514<\/a>.<\/p>\n<h3 class=\"chakra-heading group css-xuzltg\" id=\"why-dencun\" data-group=\"true\"><a class=\"chakra-link css-128fqrf\" aria-label=\"why dencun permalink\" href=\"#why-dencun\"><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>Why &#8220;Dencun&#8221;?<\/h3>\n<p class=\"chakra-text css-gi02ar\">Upgrades to the consensus layer use star names, and those to the execution layer follow Devcon city names. &#8220;Dencun&#8221; is the combination of Deneb, a first-magnitude star in the Cygnus constellation, and Cancun, the location for Devcon 3.<\/p>\n<hr aria-orientation=\"horizontal\" class=\"chakra-divider css-1e6gg7n\"\/>\n<p class=\"chakra-text css-gi02ar\">Original cover image by <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/unsplash.com\/photos\/green-palm-tree-near-body-of-water-during-daytime-K4BsLPTjKJA\">Darren Lawrence<\/a>, with modifications by <a target=\"_blank\" rel=\"noopener\" class=\"chakra-link css-vezwxf\" href=\"https:\/\/twitter.com\/tomosaito\">Tomo Saito<\/a>.<\/p>\n<\/div>\n<p><script async src=\"\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><br \/>\n<br \/><br \/>\n<br \/><a href=\"https:\/\/blog.ethereum.org\/en\/2024\/01\/24\/sepolia-holesky-dencun\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Important update: since the initial publication of this post, Lodestar has published a new release, v1.15.0, which Holesky users must upgrade to prior to Dencun&#8217;s activation on February 7th. Additionally, Prysm and Nimbus have both published highly recommended releases for Holesky. Prysm users are encouraged to use v4.2.1, and Nimbus users v24.2.0. Goerli blobs are [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":17725,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[24],"tags":[],"kronos_expire_date":[],"class_list":["post-17741","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethereum"],"_links":{"self":[{"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/posts\/17741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/comments?post=17741"}],"version-history":[{"count":0,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/posts\/17741\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/media\/17725"}],"wp:attachment":[{"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/media?parent=17741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/categories?post=17741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/tags?post=17741"},{"taxonomy":"kronos_expire_date","embeddable":true,"href":"https:\/\/cryptoted.net\/index.php\/wp-json\/wp\/v2\/kronos_expire_date?post=17741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}