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<title data-rh="true">Mithril Team Update | Cardano Development Updates</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://input-output-hk.github.io/cardano-updates/2023-01-12-mithril"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docusaurus_tag" content="default"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docsearch:docusaurus_tag" content="default"><meta data-rh="true" property="og:title" content="Mithril Team Update | Cardano Development Updates"><meta data-rh="true" name="description" content="High level overview"><meta data-rh="true" property="og:description" content="High level overview"><meta data-rh="true" property="og:type" content="article"><meta data-rh="true" property="article:published_time" content="2023-01-12T00:00:00.000Z"><meta data-rh="true" property="article:author" content="https://github.com/jpraynaud"><meta data-rh="true" property="article:tag" content="mithril"><link data-rh="true" rel="icon" href="/cardano-updates/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://input-output-hk.github.io/cardano-updates/2023-01-12-mithril"><link data-rh="true" rel="alternate" href="https://input-output-hk.github.io/cardano-updates/2023-01-12-mithril" hreflang="en"><link data-rh="true" rel="alternate" href="https://input-output-hk.github.io/cardano-updates/2023-01-12-mithril" hreflang="x-default"><link rel="alternate" type="application/rss+xml" href="/cardano-updates/rss.xml" title="Cardano Updates Feed RSS Feed">
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itemprop="author" itemscope="" itemtype="https://schema.org/Person"><div class="avatar__name"><a href="https://github.com/jpraynaud" target="_blank" rel="noopener noreferrer" itemprop="url"><span itemprop="name">Jean-Philippe Raynaud</span></a></div><small class="avatar__subtitle" itemprop="description">Mithril Tech Lead</small></div></div></div></div></header><div id="post-content" class="markdown" itemprop="articleBody"><h2 class="anchor anchorWithStickyNavbar_LWe7" id="high-level-overview">High level overview<a class="hash-link" href="#high-level-overview" title="Direct link to heading"></a></h2><p>The Mithril team has been designing a mechanism for handling seamless updates of the Mithril networks in case of breaking-changes that require synchronous update of the signer nodes. This design has been formalized in an <a href="https://mithril.network/doc/adr/4" target="_blank" rel="noopener noreferrer">ADR</a>. They have been working on an implementation of a proof of concept to rely on an on-chain transaction to synchronously trigger the version switch of all the signer nodes. They have also worked on implementing prototype solutions to minimize the use of breaking changes where soft updates are possible.</p><p>Finally, they have worked on upgrading the <code>devnet</code> and fixing some flakiness in the end to end tests of the CI.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="low-level-overview">Low level overview<a class="hash-link" href="#low-level-overview" title="Direct link to heading"></a></h2><ul><li>Implemented the redaction of an ADR for handling graceful updates of the Mithril Network <a href="https://github.com/input-output-hk/mithril/issues/671" target="_blank" rel="noopener noreferrer">#671</a></li><li>Worked on a proof of concept to handle backward compatibilty of exchanged messages with <code>protobuf</code> <a href="https://github.com/input-output-hk/mithril/issues/677" target="_blank" rel="noopener noreferrer">#677</a></li><li>Worked on a proof of concept to handle backward compatibilty of exchanged messages with <code>avro</code> <a href="https://github.com/input-output-hk/mithril/issues/678" target="_blank" rel="noopener noreferrer">#678</a></li><li>Worked on a proof of concept for reading/writing era activation markers with a Cardano chain transaction <a href="https://github.com/input-output-hk/mithril/issues/672" target="_blank" rel="noopener noreferrer">#672</a></li><li>Worked on upgrading the Cardano node of the Mithril <code>devnet</code>, as well as fixing flakiness of the CI <a href="https://github.com/input-output-hk/mithril/issues/523" target="_blank" rel="noopener noreferrer">#523</a></li><li>Prepared and tested the new <code>2302</code> distribution pre-release <a href="https://github.com/input-output-hk/mithril/releases/tag/2302.0-prerelease" target="_blank" rel="noopener noreferrer">2302.0-prerelease</a></li><li>Updated the documentation for SPO to build a signer node in order to better reflect the new release process <a href="https://github.com/input-output-hk/mithril/issues/681" target="_blank" rel="noopener noreferrer">#681</a></li></ul></div><footer class="row docusaurus-mt-lg blogPostFooterDetailsFull_mRVl"><div class="col"><b>Tags:</b><ul class="tags_jXut padding--none margin-left--sm"><li class="tag_QGVx"><a class="tag_zVej tagRegular_sFm0" href="/cardano-updates/tags/mithril">mithril</a></li></ul></div><div class="col margin-top--sm"><a href="https://github.com/input-output-hk/cardano-updates/tree/main/blog/2023-01-12-mithril.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Blog post page navigation"><a class="pagination-nav__link pagination-nav__link--prev" href="/cardano-updates/2023-01-13-system-test"><div class="pagination-nav__sublabel">Newer Post</div><div class="pagination-nav__label">System Test Team Update</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/cardano-updates/2023-01-11-consensus"><div class="pagination-nav__sublabel">Older Post</div><div class="pagination-nav__label">Consensus Team Update</div></a></nav></main><div class="col col--2"><div class="tableOfContents_bqdL thin-scrollbar"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#high-level-overview" class="table-of-contents__link toc-highlight">High level overview</a></li><li><a href="#low-level-overview" class="table-of-contents__link toc-highlight">Low level overview</a></li></ul></div></div></div></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Blog</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/cardano-updates/">Home</a></li><li class="footer__item"><a class="footer__link-item" href="/cardano-updates/archive">Archive</a></li><li class="footer__item"><a class="footer__link-item" href="/cardano-updates/tags">Tags</a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2023 Input Output Global, Inc. 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