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Soft fork
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<div class="subhead-links sourcefile" data-sourcefile="_data/glossary/en/soft-fork.yaml"
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><a href="https://github.com/dash-docs/dash-docs/edit/master/_data/glossary/en/soft-fork.yaml">Edit</a>
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<br>
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<h1 id="soft-fork-soft-forking-change">Soft Fork, Soft-Forking Change</h1>
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<p><span>This definition comes from the <a href="/en/developer-glossary">technical glossary</a>.</span></p>
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<h2 id="definition">Definition</h2>
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<p>A softfork is a change to the dash protocol wherein only previously valid <a href="/en/glossary/block" title="One or more transactions prefaced by a block header and protected by proof of work. Blocks are the data stored on the block chain." class="auto-link">blocks</a>/transactions are made invalid. Since old <a href="/en/glossary/node" title="A computer that connects to the Dash network." class="auto-link">nodes</a> will recognise the new <a href="/en/glossary/block" title="One or more transactions prefaced by a block header and protected by proof of work. Blocks are the data stored on the block chain." class="auto-link">blocks</a> as valid, a softfork is backward-compatible.</p>
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<h3 id="synonyms">Synonyms</h3>
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<ul>
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<li>Soft fork</li>
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</ul>
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<h3 id="not-to-be-confused-with">Not To Be Confused With</h3>
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<ul>
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<li>
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<p><a href="/en/glossary/fork" title="When two or more blocks have the same block height, forking the block chain. Typically occurs when two or more miners find blocks at nearly the same time. Can also happen as part of an attack." class="auto-link">Fork</a> (a regular <a href="/en/glossary/fork" title="When two or more blocks have the same block height, forking the block chain. Typically occurs when two or more miners find blocks at nearly the same time. Can also happen as part of an attack." class="auto-link">fork</a> where all <a href="/en/glossary/node" title="A computer that connects to the Dash network." class="auto-link">nodes</a> follow the same <a href="/en/glossary/consensus-rules" title="The block validation rules that full nodes follow to stay in consensus with other nodes." class="auto-link">consensus rules</a>, so the <a href="/en/glossary/fork" title="When two or more blocks have the same block height, forking the block chain. Typically occurs when two or more miners find blocks at nearly the same time. Can also happen as part of an attack." class="auto-link">fork</a> is resolved once one chain has more <a href="/en/glossary/proof-of-work" title="A hash below a target value which can only be obtained, on average, by performing a certain amount of brute force work---therefore demonstrating proof of work." class="auto-link">proof of work</a> than another)</p>
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</li>
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<li>
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<p><a href="/en/glossary/hard-fork" title="A permanent divergence in the block chain, commonly occurs when non-upgraded nodes can't validate blocks created by upgraded nodes that follow newer consensus rules." class="auto-link">Hard fork</a> (a permanent divergence in the <a href="/en/glossary/block-chain" title="A chain of blocks with each block referencing the block that preceded it. The most-difficult-to-recreate chain is the best block chain." class="auto-link">block chain</a> caused by non-upgraded <a href="/en/glossary/node" title="A computer that connects to the Dash network." class="auto-link">nodes</a> not following new <a href="/en/glossary/consensus-rules" title="The block validation rules that full nodes follow to stay in consensus with other nodes." class="auto-link">consensus rules</a>)</p>
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</li>
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<li>
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<p>Software <a href="/en/glossary/fork" title="When two or more blocks have the same block height, forking the block chain. Typically occurs when two or more miners find blocks at nearly the same time. Can also happen as part of an attack." class="auto-link">fork</a> (when one or more developers permanently develops a codebase separately from other developers)</p>
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</li>
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<li>
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<p>Git <a href="/en/glossary/fork" title="When two or more blocks have the same block height, forking the block chain. Typically occurs when two or more miners find blocks at nearly the same time. Can also happen as part of an attack." class="auto-link">fork</a> (when one or more developers temporarily develops a codebase separately from other developers</p>
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</li>
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</ul>
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<h3 id="links">Links</h3>
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<ul>
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<li>
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<p><a href="/en/developer-guide#term-soft-fork">Soft fork</a> — Developer Guide</p>
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</li>
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<li>
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<p><a href="https://en.bitcoin.it/wiki/Softfork">Soft fork</a> — Bitcoin Wiki</p>
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</li>
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<li>
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<p><a href="http://bitcoin.stackexchange.com/questions/30817">What is a soft fork?</a> — Bitcoin StackExchange</p>
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