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Alerts: SPV mining draft4

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David A. Harding 2015-07-04 02:55:12 -04:00
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_alerts/2015-07-04-spv-mining.html
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@ -4,26 +4,32 @@ alias: "spv-mining"
active: true active: true
banner: "WARNING: many wallets currently vulnerable to double-spending of confirmed transactions (click here to read)" banner: "WARNING: many wallets currently vulnerable to double-spending of confirmed transactions (click here to read)"
--- ---
<p><em>This document is being updated as new information arrives. Last <p><em>This document is being updated as new information arrives. Last
update: 2015-07-04 06:00 UTC</em></p> update: 2015-07-04 07:00 UTC</em></p>
{% assign confs="30" %}
<h2 id="summary">Summary</h2> <h2 id="summary">Summary</h2>
<p>Some miners are currently generating invalid blocks. <b>Bitcoin Core <p>Your bitcoins are safe if you received them in transations confirmed before 2015-07-04 06:00 UTC.</p>
0.9.4 and earlier</b> will accept these invalid blocks, making them
more vulnerable to double spends. This <b>also applies to web wallets</b>
from companies that still use 0.9.4 or earlier nodes.</p>
<p><b>Lightweight (SPV) wallets are also at increased risk,</b> and will <p>After that time, confirmation scores are not as reliable as they
remain so until all miners have switched back to full usually are for users of certain software:</p>
validation.</p>
<p>Users of the above listed vulnerable software must either <b>stop <ul>
accepting transactions—even if they are confirmed—</b>or <a href="/en/download">upgrade to Bitcoin <li><b>Lightweight (SPV) wallet users</b> should wait an additional {{confs}}
Core 0.10.2</a>.</p> confirmations more than you would normally wait.</li>
<p>Users of Bitcoin Core 0.9.5 and later are currently unaffected.</p> <li><b>Bitcoin Core 0.9.4 or earlier users</b> should wait an
additional {{confs}} confirmations more than you would normally
wait or upgrade to <a href="/en/download">Bitcoin Core 0.10.2</a>.</b></li>
<li><b>Web wallet users</b> should wait an additional {{confs}} confirmations
more than you would normally wait, unless you know for sure that your
wallet is secured by Bitcoin Core 0.9.5 or later.</li>
<li><b>Bitcoin Core 0.9.5 or later users</b> are unaffected.</b></li>
</ul>
<h2 id="miners">Miners</h2> <h2 id="miners">Miners</h2>
@ -49,6 +55,12 @@ systems.</p>
<li><a href="http://p2pool.in/">P2Pool</a></li> <li><a href="http://p2pool.in/">P2Pool</a></li>
</ul> </ul>
<h2 id="cause">What's Happening</h2>
<p>Some miners are currently generating invalid blocks. Almost all
software besides Bitcoin Core 0.9.5 and later will accept these invalid
blocks under certain conditions.</p>
<p><b>More information to follow.</b></p> <p><b>More information to follow.</b></p>
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