{"id":40990,"date":"2025-04-28T19:30:03","date_gmt":"2025-04-28T16:30:03","guid":{"rendered":"https:\/\/coinengineer.net\/blog\/?p=40990"},"modified":"2025-04-28T19:13:13","modified_gmt":"2025-04-28T16:13:13","slug":"ethereum-fusaka-update-is-coming-major-changes-ahead","status":"publish","type":"post","link":"https:\/\/coinengineer.net\/blog\/ethereum-fusaka-update-is-coming-major-changes-ahead\/","title":{"rendered":"Ethereum Fusaka Update is Coming: Major Changes Ahead!"},"content":{"rendered":"<p class=\"\" data-start=\"2971\" data-end=\"3320\">According to Ethereum Foundation officials, the <strong data-start=\"3019\" data-end=\"3048\">Ethereum Fusaka hard fork<\/strong> is expected to occur in <strong data-start=\"3073\" data-end=\"3090\">Q3 or Q4 2025<\/strong>. While the exact date is yet to be finalized, Ethereum Foundation co-executive director <strong data-start=\"3179\" data-end=\"3206\">Tomasz Kajetan Sta\u0144czak<\/strong> confirmed that the upcoming <strong data-start=\"3235\" data-end=\"3262\">EVM Object Format (EOF)<\/strong> upgrade will be a central component of the Fusaka update.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-fusaka-update-is-coming-major-changes-ahead\/#Whats_Changing_With_Fusaka\" title=\"What\u2019s Changing With Fusaka?\">What\u2019s Changing With Fusaka?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-fusaka-update-is-coming-major-changes-ahead\/#Goodbye_%E2%80%9CJUMP%E2%80%9D_Hello_%E2%80%9CRJUMP%E2%80%9D\" title=\"Goodbye &#8220;JUMP&#8221;, Hello &#8220;RJUMP&#8221;\">Goodbye &#8220;JUMP&#8221;, Hello &#8220;RJUMP&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-fusaka-update-is-coming-major-changes-ahead\/#Controversy_Surrounding_EOF\" title=\"Controversy Surrounding EOF\">Controversy Surrounding EOF<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"3322\" data-end=\"3354\"><span class=\"ez-toc-section\" id=\"Whats_Changing_With_Fusaka\"><\/span>What\u2019s Changing With Fusaka?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"3356\" data-end=\"3480\">The Ethereum Virtual Machine (EVM) \u2014 responsible for executing smart contracts \u2014 will undergo significant protocol upgrades:<\/p>\n<ul>\n<li data-start=\"3484\" data-end=\"3579\"><strong data-start=\"3484\" data-end=\"3508\">New container format<\/strong> for smart contract bytecode, introducing better structure and clarity.<\/li>\n<li data-start=\"3582\" data-end=\"3657\"><strong data-start=\"3582\" data-end=\"3607\">Header (0xEF00 value)<\/strong> followed by a version number for future upgrades.<\/li>\n<li data-start=\"3660\" data-end=\"3717\"><strong data-start=\"3660\" data-end=\"3677\">Section table<\/strong> to provide metadata about the contract.<\/li>\n<li data-start=\"3720\" data-end=\"3804\"><strong data-start=\"3720\" data-end=\"3756\">Separated code and data sections<\/strong>, making contracts easier to analyze and verify.<\/li>\n<\/ul>\n<p class=\"\" data-start=\"3806\" data-end=\"3959\">This structure is designed to streamline EVM operations, increase efficiency, and provide a cleaner development environment for smart contract engineers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Goodbye_%E2%80%9CJUMP%E2%80%9D_Hello_%E2%80%9CRJUMP%E2%80%9D\"><\/span>Goodbye &#8220;JUMP&#8221;, Hello &#8220;RJUMP&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"3996\" data-end=\"4396\">Currently, EVM uses <code data-start=\"4016\" data-end=\"4022\">JUMP<\/code> and <code data-start=\"4027\" data-end=\"4034\">JUMPI<\/code> to redirect execution to arbitrary bytecode positions \u2014 a method that can conceal malicious code.<br data-start=\"4132\" data-end=\"4135\" \/>Through <strong data-start=\"4143\" data-end=\"4155\">EIP-4200<\/strong> and <strong data-start=\"4160\" data-end=\"4172\">EIP-4750<\/strong>, these dynamic jumps will be replaced by safer alternatives like <strong data-start=\"4238\" data-end=\"4247\">CALLF<\/strong> (function call) and <strong data-start=\"4268\" data-end=\"4276\">RETF<\/strong> (return from function). Additionally, <strong data-start=\"4315\" data-end=\"4324\">RJUMP<\/strong> and <strong data-start=\"4329\" data-end=\"4339\">RJUMPI<\/strong> will mandate hardcoded destinations within the bytecode.<\/p>\n<hr \/>\n<p data-start=\"4398\" data-end=\"4429\"><strong><em>You Might Be Interested In: <a href=\"https:\/\/coinengineer.net\/blog\/elon-musk-talks-about-the-name-of-a-new-memecoin\/\">Elon Musk Talks About the Name of a New Memecoin!<\/a><\/em><\/strong><\/p>\n<hr \/>\n<h2 data-start=\"4398\" data-end=\"4429\"><span class=\"ez-toc-section\" id=\"Controversy_Surrounding_EOF\"><\/span>Controversy Surrounding EOF<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"4431\" data-end=\"4539\">However, not everyone supports EOF.<br data-start=\"4466\" data-end=\"4469\" \/>Developer <strong data-start=\"4479\" data-end=\"4501\">Pascal Caversaccio<\/strong> and others have raised concerns that:<\/p>\n<ul>\n<li data-start=\"4543\" data-end=\"4569\">EOF is <strong data-start=\"4550\" data-end=\"4568\">overly complex<\/strong>,<\/li>\n<li data-start=\"4572\" data-end=\"4638\">It <strong data-start=\"4575\" data-end=\"4602\">adds unnecessary layers<\/strong> to an already intricate EVM system,<\/li>\n<li data-start=\"4641\" data-end=\"4721\">It could <strong data-start=\"4650\" data-end=\"4678\">open new vulnerabilities<\/strong> by requiring significant tooling upgrades,<\/li>\n<li data-start=\"4724\" data-end=\"4784\">It might <strong data-start=\"4733\" data-end=\"4765\">force indefinite maintenance<\/strong> of the legacy EVM.<\/li>\n<\/ul>\n<p class=\"\" data-start=\"4786\" data-end=\"4947\">A recent ETHPulse poll revealed that voters holding nearly <strong data-start=\"4845\" data-end=\"4859\">17,745 ETH<\/strong> oppose the EOF upgrade, while only a few holders with less than <strong data-start=\"4924\" data-end=\"4935\">300 ETH<\/strong> support it.<\/p>\n<p data-start=\"4786\" data-end=\"4947\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-154389 size-full\" src=\"https:\/\/coinmuhendisi.com\/blog\/wp-content\/uploads\/2025\/04\/ethereum-2.webp\" alt=\"ethereum\" width=\"841\" height=\"397\" \/><\/p>\n<hr \/>\n<p data-start=\"4786\" data-end=\"4947\"><em>You can also freely share your thoughts and comments about the topic in the comment section. Additionally, don\u2019t forget to follow us on our\u00a0<a href=\"https:\/\/t.me\/coinengineernews\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>Telegram,\u00a0<\/strong><\/a><a href=\"https:\/\/www.youtube.com\/@CoinEngineer\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>YouTube<\/strong><\/a>,\u00a0and\u00a0<a href=\"https:\/\/twitter.com\/coinengineers\" target=\"_blank\" rel=\"nofollow noopener\"><strong>Twitter<\/strong><\/a>\u00a0channels for the latest\u00a0<a title=\"News\" href=\"https:\/\/coinengineer.net\/blog\/news\/\" data-internallinksmanager029f6b8e52c=\"7\">news<\/a>\u00a0and updates.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>According to Ethereum Foundation officials, the Ethereum Fusaka hard fork is expected to occur in Q3 or Q4 2025. While the exact date is yet to be finalized, Ethereum Foundation co-executive director Tomasz Kajetan Sta\u0144czak confirmed that the upcoming EVM Object Format (EOF) upgrade will be a central component of the Fusaka update. What\u2019s Changing<\/p>\n","protected":false},"author":28,"featured_media":35338,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,657,2],"tags":[14990,14991,14989,11165,14985,14993,14986,14987,14988,14992],"class_list":["post-40990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-crypto-news","category-en","category-news","tag-eip-4200","tag-eip-4750","tag-eof-upgrade","tag-ethereum-developers","tag-ethereum-fusaka","tag-ethereum-governance","tag-ethereum-hard-fork-2025","tag-evm-changes","tag-evm-object-format","tag-solidity-updates"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ethereum Fusaka Update is Coming: Major Changes Ahead! - Coin Engineer<\/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:\/\/coinengineer.net\/blog\/ethereum-fusaka-update-is-coming-major-changes-ahead\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ethereum Fusaka Update is Coming: Major Changes Ahead! - Coin Engineer\" \/>\n<meta property=\"og:description\" content=\"According to Ethereum Foundation officials, the Ethereum Fusaka hard fork is expected to occur in Q3 or Q4 2025. 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