Solar

<p>Solar  Core is a fork of the ARK Core v3 blockchain. The ARK Blockchain  launched in 2017 and was first written in JavaScript and then rewritten  in TypeScript.</p><p>It  is not unusual for blockchain forks to happen quite often. Many  cryptocurrencies are the result of blockchain forks. This article aims  to explain what a blockchain fork is and how this relates to Solar.</p><h2 id="header-0">What is a Fork</h2><p>A hard fork is an event on a blockchain that copies the original  software and adds necessary changes to it. The two blockchains cannot  coexist and the new blockchain splits away from the main blockchain. The  two blockchains are incompatible and continue to evolve and develop  independently. This fork requires all users to upgrade to the latest  version of the software. Nodes running on the previous version of the  software will no longer be accepted on the new version.</p><p>Some examples of forked chains:</p><ul><li>Litecoin is a fork of the Bitcoin blockchain</li><li>Dogecoin is a fork of the Luckycoin blockchain</li><li>Ethereum Classic is a fork of the Ethereum blockchain</li></ul><p>Think of a fork as a modification of a blockchain.</p><h2 id="header-1">Solar Fork</h2><p>As  previously stated, Solar is a fork of the ARK blockchain. However, it  is different to the type of fork described above. The Solar fork was a  software development fork. This means that Solar was never part of the  ARK blockchain. Solar developers took a copy of the ARK source code and  made improvements and enhancements. Many of these improvements were  fixing security vulnerabilities.</p><p>The  question arises whether it is legal to fork code. In this case, it was  completely legal for Solar developers to fork ARK code. ARK is MIT  licensed. This licence allows users to reuse code and make any changes  or modifications. Solar code has a different licence. Its licence is  CC-BY-ND-4.0 which means although it is open source, it does not entitle  people to change it in any way or use it commercially.</p><h2 id="header-2">Secure Solar</h2><p>The  ARK blockchain launched way back in 2017 and is a product of its time.  Several of its features are not suitable for a modern blockchain. Over  the years, many vulnerabilities were discovered in ARK Core. The  majority of these vulnerabilities were patched and reported to ARK by  our Solar Core lead developer, Gym.</p><p>This leads to the question if there were all these vulnerabilities with ARK Core, why use it?</p><p>One  of the benefits of using and building on existing code is that it has  had many eyes on it over the years. For example, the many  vulnerabilities discovered in ARK Core are not present in Solar Core  because developers spent hours poring over it. Existing code is in  essence battle tested. Forking ARK Core rather than starting from  scratch meant we could take this battle-tested platform and build in new  features and improvements.</p><p>Solar  Core developers are continually improving and developing Solar code.  All Solar code is audited thoroughly before being made public. Any code  considered important is submitted to GitHub as a Pull Request. This  request must be approved by an accredited developer before it is moved  to a public repository. Solar GitHub is also protected by 2FA to  minimise the risk of malicious attacks.</p><p>All  new versions of Solar Core are passed to the 53 block producers for  testing on testnet. The mainnet chain will only be upgraded when the new  changes have been tested and any enhancements or fixes have been  finally approved by all block producers. It must be pointed out that  these block producers are decentralised, they are not part of a Solar  “team”.</p><p>Solar code is also available for the community to view. Enthusiasts and developers are welcome to look through Solar code.</p><p>Any  potential security concerns or issues can be sent to security&#64;solar.org  This e-mail address is closely monitored and relevant issues are given  the highest priority.</p><p>With all this attention to detail and scrutiny, it is no surprise to learn that Solar Core is safe, stable and secure.</p><p>An appendix of ARK issues and their status can be found in the Security and Analysis report, starting on page 28</p><p><a href="https://github.com/Solar-network/security/blob/main/solar-core/security-and-analysis-report-for-solar-core.v1.00.pdf" rel="noopener noreferrer nofollow">https://github.com/Solar-network/security/blob/main/solar-core/security-and-analysis-report-for-solar-core.v1.00.pdf</a></p><p></p><h2 id="header-3"></h2><h2 id="header-4"></h2><h2 id="header-5"></h2><p></p>

Security and Analysis Report: Part 2

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Solar

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