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<title>Release notes — R3 Corda latest documentation</title>
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<a href="index.html" class="icon icon-home"> R3 Corda
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<div class="version">
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latest
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API reference: <a href="api/kotlin/corda/index.html">Kotlin</a>/ <a href="api/javadoc/index.html">JavaDoc</a>
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<br>
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<a href="https://discourse.corda.net">Discourse Forums</a>
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<a href="http://slack.corda.net">Slack</a>
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<p class="caption"><span class="caption-text">Getting started</span></p>
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<li class="toctree-l1"><a class="reference internal" href="inthebox.html">What’s included?</a></li>
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<p class="caption"><span class="caption-text">Key concepts</span></p>
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<li class="toctree-l1"><a class="reference internal" href="key-concepts-ecosystem.html">Corda ecosystem</a></li>
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<li class="toctree-l1"><a class="reference internal" href="key-concepts-data-model.html">Data model</a></li>
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<li class="toctree-l1"><a class="reference internal" href="key-concepts-core-types.html">Core types</a></li>
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<p class="caption"><span class="caption-text">CorDapps</span></p>
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<li class="toctree-l1"><a class="reference internal" href="running-a-notary.html">Running a notary service</a></li>
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<li class="toctree-l1"><a class="reference internal" href="oracles.html">Writing oracle services</a></li>
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<li class="toctree-l1"><a class="reference internal" href="tutorial-attachments.html">Using attachments</a></li>
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<li class="toctree-l1"><a class="reference internal" href="event-scheduling.html">Event scheduling</a></li>
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<li class="toctree-l1"><a class="reference internal" href="network-simulator.html">Network Simulator</a></li>
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<li class="toctree-l1"><a class="reference internal" href="clauses.html">Clauses</a></li>
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<li class="toctree-l1"><a class="reference internal" href="merkle-trees.html">Transaction tear-offs</a></li>
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<li class="toctree-l1"><a class="reference internal" href="contract-irs.html">Interest rate swaps</a></li>
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<p class="caption"><span class="caption-text">Appendix</span></p>
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<ul class="current">
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<li class="toctree-l1"><a class="reference internal" href="loadtesting.html">Load testing</a></li>
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<li class="toctree-l1"><a class="reference internal" href="setting-up-a-corda-network.html">What is a corda network?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="secure-coding-guidelines.html">Secure coding guidelines</a></li>
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<li class="toctree-l1"><a class="reference internal" href="release-process.html">Release process</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">Release notes</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#milestone-9">Milestone 9</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="changelog.html">Changelog</a></li>
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<li class="toctree-l1"><a class="reference internal" href="codestyle.html">Code style guide</a></li>
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<li class="toctree-l1"><a class="reference internal" href="building-the-docs.html">Building the documentation</a></li>
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<li class="toctree-l1"><a class="reference internal" href="further-notes-on-kotlin.html">Further notes on Kotlin</a></li>
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<li class="toctree-l1"><a class="reference internal" href="publishing-corda.html">Publishing Corda</a></li>
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<li class="toctree-l1"><a class="reference internal" href="azure-vm.html">Working with the Corda Demo on Azure Marketplace</a></li>
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</ul>
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<p class="caption"><span class="caption-text">Glossary</span></p>
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<li class="toctree-l1"><a class="reference internal" href="glossary.html">Glossary</a></li>
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<div class="section" id="release-notes">
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<h1>Release notes<a class="headerlink" href="#release-notes" title="Permalink to this headline">¶</a></h1>
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<p>Here are release notes for each snapshot release from M9 onwards. This includes guidance on how to upgrade code from
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the previous milestone release.</p>
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<div class="section" id="milestone-9">
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<h2>Milestone 9<a class="headerlink" href="#milestone-9" title="Permalink to this headline">¶</a></h2>
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<p>This release focuses on improvements to resiliency of the core infrastructure, with highlights including a Byzantine
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fault tolerant (BFT) decentralised notary, based on the BFT-SMaRT protocol and isolating the web server from the
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Corda node.</p>
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<p>With thanks to open source contributor Thomas Schroeter for providing the BFT notary prototype, Corda can now resist
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malicious attacks by members of a distributed notary service. If your notary service cluster has seven members, two can
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become hacked or malicious simultaneously and the system continues unaffected! This work is still in development stage,
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and more features are coming in the next snapshot!</p>
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<p>The web server has been split out of the Corda node as part of our ongoing hardening of the node. We now provide a Jetty
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servlet container pre-configured to contact a Corda node as a backend service out of the box, which means individual
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webapps can have their REST APIs configured for the specific security environment of that app without affecting the
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others, and without exposing the sensitive core of the node to malicious Javascript.</p>
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<p>We have launched a global training programme, with two days of classes from the R3 team being hosted in London, New York
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and Singapore. R3 members get 5 free places and seats are going fast, so sign up today.</p>
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<p>We’ve started on support for confidential identities, based on the key randomisation techniques pioneered by the Bitcoin
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and Ethereum communities. Identities may be either anonymous when a transaction is a part of a chain of custody, or fully
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legally verified when a transaction is with a counterparty. Type safety is used to ensure the verification level of a
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party is always clear and avoid mistakes. Future work will add support for generating new identity keys and providing a
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certificate path to show ownership by the well known identity.</p>
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<p>There are even more privacy improvements when a non-validating notary is used; the Merkle tree algorithm is used to hide
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parts of the transaction that a non-validating notary doesn’t need to see, whilst still allowing the decentralised
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notary service to sign the entire transaction.</p>
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<p>The serialisation API has been simplified and improved. Developers now only need to tag types that will be placed in
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smart contracts or sent between parties with a single annotation... and sometimes even that isn’t necessary!</p>
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<p>Better permissioning in the cash CorDapp, to allow node users to be granted different permissions depending on whether
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they manage the issuance, movement or ledger exit of cash tokens.</p>
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<p>We’ve continued to improve error handling in flows, with information about errors being fed through to observing RPC
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clients.</p>
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<p>There have also been dozens of bug fixes, performance improvements and usability tweaks. Upgrading is definitely
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worthwhile and will only take a few minutes for most apps.</p>
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<p>For a full list of changes please see <span class="xref doc">change-log</span>.</p>
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