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Transaction malleability
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<div class="subhead-links sourcefile" data-sourcefile="_data/glossary/en/malleability.yaml"
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><a href="https://github.com/dash-docs/dash-docs/edit/master/_data/glossary/en/malleability.yaml">Edit</a>
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<br>
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<h1 id="transaction-malleability-mutability">Transaction Malleability, Mutability</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>The ability of someone to change (<a href="/en/glossary/malleability" title="The ability of someone to change (mutate) unconfirmed transactions without making them invalid, which changes the transaction's txid, making child transactions invalid." class="auto-link">mutate</a>) <a href="/en/glossary/confirmation-score" title="A score indicating the number of blocks on the best block chain that would need to be modified to remove or modify a particular transaction. A confirmed transaction has a confirmation score of one or higher." class="auto-link">unconfirmed transactions</a> without making them invalid, which changes the transaction’s <a href="/en/glossary/txid" title="An identifier used to uniquely identify a particular transaction; specifically, the sha256d hash of the transaction." class="auto-link">txid</a>, making child transactions invalid.</p>
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<h3 id="synonyms">Synonyms</h3>
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<ul>
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<li>
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<p>Transaction malleability</p>
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</li>
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<li>
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<p>Transaction mutability</p>
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</li>
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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><a href="https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki" class="auto-link">BIP62</a> (a proposal for an optional new transaction version that reduces the set of known mutations for common transactions)</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#transaction-malleability">Transaction malleability</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/Transaction_Malleability">Transaction malleability</a> — Bitcoin Wiki</p>
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</li>
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<li>
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<p><a href="https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki">BIP62: dealing with malleability</a> — Bitcoin Improvement Proposals</p>
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