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50 lines
1.9 KiB
HTML
50 lines
1.9 KiB
HTML
---
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layout: simple
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---
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<div class="container">
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<section id="dos">
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<h1>11/12 March 2013 Chain Fork Information</h1>
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<h2>What happened</h2>
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<p>
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A bitcoin miner running version 0.8.0 created a large block (at height 225,430) that is incompatible
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with earlier versions of Bitcoin.
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</p>
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<p>
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The result was a block chain fork, with miners, merchants and users running the new version of bitcoin
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accepting, and building on, that block, and miners, merchants and users running older versions of bitcoin
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rejecting it and creating their own block chain.
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</p>
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<h2>What is being done</h2>
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<p>
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Large mining pools running version 0.8.0 were asked to switch back to version 0.7, to create a
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single block chain compatible with all bitcoin software.
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</p>
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<h2>Questions & Answers</h2>
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<h3>I'm not a miner or a merchant, what should I do?</h3>
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<p>
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Nothing. Your bitcoin software will switch to the correct chain automatically, no matter
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which version you are running.
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</p>
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<h3>Are my bitcoins safe?</h3>
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<p>
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Yes.
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</p>
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<h3>I'm a merchant accepting bitcoins, what should I do?</h3>
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<p>
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If you are running version 0.8.0, there is a small risk that payments with more than
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6 confirmations could be double-spent on the 0.7-compatible blockchain. The risk is small
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because this is not a network split-- transactions are being sent to both sides of the
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chain split, and it is unlikely (but possible) that somebody could get two versions of the
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same transaction into the two sides of the chain.
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</p>
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<h2>What will be done</h2>
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<p>
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The core developers are investigating exactly what causes the old versions to reject the new
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blocks, and will release a 0.8.1 version that avoids creating blocks that are incompatible with
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older versions.
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</p>
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<div style="text-align:right">
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<i>This notice last updated: 12 March 2013 02:45 UTC</i>
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</div>
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</section>
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</div>
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