<p>The oldest version that can sync is 0.8.6. This is the version that first used LevelDB instead of BDB. Both the IRC node discovery and the protocol message changes occurred several versions prior.</p>

CC BY-SA 4.0
2019-10-12T00:16:21.193Z
2019-10-12T00:16:21.193Z
Ava Chow
<p>I've seen <a href="https://bitcoin.stackexchange.com/questions/74323/does-a-2009-client-sync-the-whole-bitcoin-blockchain/74335">this</a> question regarding the original Satoshi Client being able to sync to the chain tip. The main issues why it doesn't work were:</p>

<ul>
<li>Change in protocol messages</li>
<li>IRC Node discovery is now disabled</li>
<li>Number of BDB locks too low</li>
</ul>

<p>When have these issues been resolved? What is the oldest bitcoin core client that can sync to the chain tip (disregarding any problems with the client itself being very slow).</p>

<bitcoin-core><client><network>
What is the oldest Bitcoin Core Client that can in theory sync to the chain tip?
Hellwerker
# What is the oldest Bitcoin Core Client that can in theory sync to the chain tip?

(Asked by: username_0 on 2019-10-05)

I've seen [this](https://bitcoin.stackexchange.com/questions/74323/does-a-2009-client-sync-the-whole-bitcoin-blockchain/74335) question regarding the original Satoshi Client being able to sync to the chain tip. The main issues why it doesn't work were:

* Change in protocol messages
* IRC Node discovery is now disabled
* Number of BDB locks too low

When have these issues been resolved? What is the oldest bitcoin core client that can sync to the chain tip (disregarding any problems with the client itself being very slow).

**Tags:** bitcoin-core, client, network


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## 1 answers

### Answer by username_1 on 2019-10-12. Score: 6 | Accepted answer

The oldest version that can sync is 0.8.6. This is the version that first used LevelDB instead of BDB. Both the IRC node discovery and the protocol message changes occurred several versions prior.


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