[ANN] pynode: Simple bitcoin P2P node

[jgarzik]

Very nice tool. Am I correct that this could be the basis of a tool to monitor large numbers of addresses for activity?

Sure.  It could monitor whatever metrics you need, on the bitcoin network.

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[marcus_of_augustus]

Wondering if an Electrum client might be able to modified to talk to a pynode ... or vice versa?

What does Electrum use to talk to bitcoind?   pynode provides a JSON-RPC HTTP server interface, just like bitcoind...

It uses the Stratum protocol ... but I don't have detailed knowledge of that, yet.

[wabber]

Wondering if an Electrum client might be able to modified to talk to a pynode ... or vice versa?

What does Electrum use to talk to bitcoind?   pynode provides a JSON-RPC HTTP server interface, just like bitcoind...

It uses the Stratum protocol ... but I don't have detailed knowledge of that, yet.

there are 2 electrum applications: the electrum client and the electrum server. The electrum server talks to bitcoind using the JSON-RPC interface but stores it's own blockchain. The electrum client talks to the electrum server using the stratum protocol.

[jgarzik]

Thanks (again) to socrates1024, pynode has switched to using the leveldb database, plus a flat file format for raw blockchain data.

This database upgrade is wholly incompatible with the previous GDBM-based database.

When signature checking is disabled, the entire blockchain may be downloaded in 34 minutes.

When signature checking is enabled, the blockchain download process takes many hours (6-12), due to slowness of python.

[jgarzik]

The on-disk block file format was just updated to match the network's "block" message format.

This is an incompatible change.  You will need to delete, and re-download, your block databases.

[jgarzik]

pynode is very much alive and well.  It is becoming popular enough that we can branch off the internal "bitcoin" sub-directory into a proper python library, python-bitcoinlib.

Stay tuned for details.

[jgarzik]

Library forked, and moved to a new home and forum thread:

     https://github.com/jgarzik/python-bitcoinlib

Pull requests and donations welcome, as always.

[tehace]

Hello I am a bit new to programming but I would love to experiment around with pynode and python-bitcoinlib are there any guides or source code examples available or would I need to figure that stuff out myself? (I promise not to store anyone's life savings using it until I know the node and libs inside and out inside and out)

[jgarzik]

Hello I am a bit new to programming but I would love to experiment around with pynode and python-bitcoinlib are there any guides or source code examples available or would I need to figure that stuff out myself? (I promise not to store anyone's life savings using it until I know the node and libs inside and out inside and out)

pynode and assorted utilities dbck.py and mkbootstrap.py are essentially source code examples for python-bitcoinlib.  Unfortunately that's it.

Contributed examples are welcome in both projects, however.

[tehace]

Thanks for the quick reply. As soon as I figure stuff out I shall contribute anything useful I do back.

[jgarzik]

This received several bug fixes, by way of its use of python-bitcoinlib.

[jgarzik]

Merged "addnodes" support, so that additional nodes may be added via configuration file.

[weex]

Nice. This is a fun project to play around with.

[phelix]

Is pynode still being updated? Or is there a follow up?