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33 lines
1.3 KiB
HTML
33 lines
1.3 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="feb20">
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<h1>February 20, 2012 Protocol Changes</h1>
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<p>
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In June 2010 the Bitcoin reference software version 0.2.10 introduced
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a change to the protocol: the 'version' messages exchanged by nodes
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at connection time would have a new format that included checksum
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values to detect corruption by broken networks.
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</p><p>
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All other messages already carry a checksum (for connections between
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nodes 0.2.9 and later) but the version messages themselves could not
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be changed in a compatible way, so this change was delayed and does not take effect until
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Midnight UTC on Feb 20th 2012 to leave users time to upgrade.
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</p><p>
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The developers of the Bitcoin reference software are unable to find
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any evidence of any nodes still running software prior to 0.2.10 on
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the network. If any nodes with software this old
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do still exist, they will no longer be able to connect to newer nodes
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after this date.
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</p><p>
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This switchover has been tested and no significant disruption is
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expected. Nodes with incorrect clocks may have a difficult
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time making new connections for a brief period around the switchover
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time.
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</p><p>
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If there are unexpected difficulties this page will be updated with
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relevant information.
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</p>
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</section>
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</div>
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