{"id":580744,"date":"2026-04-09T03:28:02","date_gmt":"2026-04-09T03:28:02","guid":{"rendered":"https:\/\/Blockchain.News\/news\/conflux-cfx-v3-0-3-node-upgrade-cip-166-opcode"},"modified":"2026-04-09T03:28:02","modified_gmt":"2026-04-09T03:28:02","slug":"conflux-cfx-cfx-releases-v3-0-3-node-upgrade-with-cip-166-opcode","status":"publish","type":"post","link":"https:\/\/e-bitco.in\/index.php\/2026\/04\/09\/conflux-cfx-cfx-releases-v3-0-3-node-upgrade-with-cip-166-opcode\/","title":{"rendered":"Conflux (CFX) CFX Releases v3.0.3 Node Upgrade With CIP-166 Opcode"},"content":{"rendered":"<figure class=\"figure mt-2\">\n<p> <a href=\"https:\/\/blockchain.news\/Profile\/Rongchai-Wang\">Rongchai Wang<\/a> <span class=\"publication-date ml-2\"> Apr 09, 2026 03:28<\/span> <\/p>\n<p class=\"lead\">Conflux (CFX) Network rolls out v3.0.3 upgrade fixing seven critical bugs and adding CIP-166 opcode. Node operators can delay without network disruption.<\/p>\n<p> <a href=\"https:\/\/blockchainstock.azureedge.net\/features\/2080ABD9F160A87FC82AF14B37A47B528381AEC98B9085655481D1827899734A.jpg\" class=\"hero-image-link\"> <img fetchpriority=\"high\" decoding=\"async\" class=\"rounded hero-image\" src=\"https:\/\/blockchainstock.azureedge.net\/features\/2080ABD9F160A87FC82AF14B37A47B528381AEC98B9085655481D1827899734A.jpg\" alt=\"Conflux (CFX) CFX Releases v3.0.3 Node Upgrade With CIP-166 Opcode\" loading=\"eager\" width=\"1200\" height=\"630\"> <\/a> <\/figure>\n<p>Conflux (CFX) Network pushed its v3.0.3 node upgrade on April 9, 2026, delivering seven bug fixes and introducing the CIP-166 Count Leading Zeros opcode. Unlike hard forks, this stability-focused release doesn&#8217;t require immediate action from node operators\u2014though the development team recommends upgrading.<\/p>\n<p>CFX currently trades at $0.05, up roughly 1% over 24 hours, with a market cap near $261 million. The token gained 12% in mid-March following a technical breakout from its downtrend.<\/p>\n<h2>Critical Bug Squashed<\/h2>\n<p>The most significant fix addresses a PoS force-retire overflow bug that caused nodes to panic with a &#8220;subtract with overflow&#8221; error when force-retire events triggered earlier than expected. For validators running Conflux&#8217;s hybrid PoW\/PoS consensus, this patch eliminates a potential crash scenario.<\/p>\n<p>Other notable fixes include:<\/p>\n<ul>\n<li>CIP-78 sponsor flag corrections for reverted transactions during testnet replay<\/li>\n<li>A fee_history deadlock resolved through read_recursive implementation<\/li>\n<li>Gas limit maintenance errors in the transaction packing pool<\/li>\n<li>eth_estimateGas now properly handles non-existent sender addresses<\/li>\n<\/ul>\n<h2>Developer-Facing Changes<\/h2>\n<p>The upgrade adds CIP-166, implementing a Count Leading Zeros opcode\u2014a low-level optimization useful for certain cryptographic operations and mathematical computations. Developers building on Conflux&#8217;s EVM-compatible eSpace environment also get a new state dump subcommand for exporting all eSpace accounts to JSON.<\/p>\n<p>RPC improvements include pending tag support for eth_blockByNumber and an accumulatedGasUsed field in transaction receipts. The Core Space trace API received structural updates removing Option wrappers from several fields.<\/p>\n<h2>Infrastructure Modernization<\/h2>\n<p>Under the hood, Conflux bumped its Rust compiler requirement to version 1.90 and updated the revm and c-kzg dependencies. The team also established GitHub Actions CI\/CD workflows across Linux, macOS, and Windows\u2014a sign of maturing development infrastructure.<\/p>\n<h2>What Node Operators Should Know<\/h2>\n<p>The upgrade process remains straightforward: stop your node, swap the conflux executable with the v3.0.3 binary from GitHub, and restart. New node operators can download v3.0.3 directly.<\/p>\n<p>Conflux explicitly stated this upgrade targets stability improvements only. &#8220;It&#8217;ll be fine if you do not upgrade to this version,&#8221; the announcement notes\u2014meaning no consensus changes or hard fork deadlines.<\/p>\n<p>For a network that&#8217;s built partnerships with China Telecom and integrated with social platform XiaohongShu, maintaining node stability supports Conflux&#8217;s positioning as enterprise-ready infrastructure. The next meaningful catalyst for CFX traders will likely come from ecosystem expansion rather than core protocol changes.<\/p>\n<p><span><i>Image source: Shutterstock<\/i><\/span> <!-- Divider --> <!-- Author info END --> <!-- Divider --> <a href=\"https:\/\/blockchain.news\/\">Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rongchai Wang Apr 09, 2026 03:28 Conflux (CFX) Network rolls out v3.0.3 upgrade fixing seven critical bugs and adding CIP-166 opcode. Node operators can delay without network disruption. Conflux (CFX) Network pushed its v3.0.3 node upgrade on April 9, 2026, delivering seven bug fixes and introducing the CIP-166 Count Leading Zeros opcode. Unlike hard forks, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":580745,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[8701,24604,8833,16852,25,13496],"class_list":{"0":"post-580744","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-blockchain","8":"tag-cfx","9":"tag-cip-166","10":"tag-conflux","11":"tag-network-upgrade","12":"tag-news","13":"tag-node-operators"},"_links":{"self":[{"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/posts\/580744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/comments?post=580744"}],"version-history":[{"count":0,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/posts\/580744\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/media\/580745"}],"wp:attachment":[{"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/media?parent=580744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/categories?post=580744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/e-bitco.in\/index.php\/wp-json\/wp\/v2\/tags?post=580744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}