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Conflicting Bitcoin Core Files: Bitcoin-Qt and Bitcoind

When using Bitcoin Core 25.1 on a Raspberry Pi, it is not uncommon to encounter conflicts between the two different versions of the Bitcoin-QT and Bitcoind binaries. In this article, we will explore how to resolve these conflicts by modifying the bitcoin.conf file.

The Problem: Conflicting Files

The bitcoin.conf file contains specific settings for each version of Bitcoin Core. The most notable difference between the two versions is the use of different protocol parameters.

Bitcoin-Qt and Bitcoind Binaries

When you download Bitcoin Core 25.1, it comes with both Bitcoin-QT (based on Qt) and Bitcoind binaries. The bitcoin.conf file contains specific settings for each binary version.

For example, when using Bitcoin-QT, the bitcoin.conf file includes lines like:

[general]
server = localhost:8332
port = 8332

When using Bitcoind, the corresponding line would be:

[general]
server = localhost:8333
port = 8333

Conflicting files

To resolve the conflict between bitcoin.conf files from different versions of Bitcoin core, you need to update or modify the configuration in each file. Here’s what we’ll do:

• Update the .bitcoin directory on the external drive

• Create an external drive (e.g. a USB SD card) and copy the contents of the ~/.local/share/bitcoin-core directory from your Raspberry Pi to the new drive.

• Editing .bitcoin files

On your Raspberry Pi, navigate to the ~/.bitcoin directory.

For Bitcoin-QT:

nano ~/.bitcoin/qt.conf

For Bitcoind:

nano ~/.bitcoin/bitcoreconf.conf

Update configuration in .bitcoin files

In each of the .bitcoin files, update the following configuration:

• server (for Bitcoin-QT): change from localhost:8332 to localhost:8331

• port (for Bitcoind): change from 8333 to 8331

Rebuild .bitcoin files

After updating the configuration in each file, rebuild the .bitcoin files:

./build-bitcoinqt
./build-bitcoreconf

Verify that conflicts have been resolved

To Verify that conflicts have been resolved:

• Start Bitcoin-QT and Bitcoind without specifying a server or port.

• Verify that both services start correctly.

By updating or modifying the configuration in each .bitcoin file, you should now be able to use both versions of Bitcoin Core on your Raspberry Pi.