LBRYcrd uses a blockchain similar to bitcoin's to implement an index and payment system for content on the LBRY network. It is a fork of bitcoin core. In addition to the libraries used by bitcoin, LBRYcrd also uses icu4c.
Please read the [lbry.tech overview](https://lbry.tech/overview) for a general understanding of the LBRY pieces. From there you could read the [LBRY spec](https://spec.lbry.com/) for specifics on the data in the blockchain.
Latest binaries are available from https://github.com/lbryio/lbrycrd/releases. There is no installation procedure; the CLI binaries will run as-is and will have any uncommon dependencies statically linked into the binary. The QT GUI is not supported. LBRYcrd is distributed as a collection of executable files; traditional installers are not provided.
The data directory contains various things such as your default wallet (wallet.dat), debug logs (debug.log), and blockchain data. You can optionally create a configuration file lbrycrd.conf in the default data directory which will be used by default when running lbrycrdd.
For a list of configuration parameters, run `./lbrycrdd --help`. Below is a sample lbrycrd.conf to enable JSON RPC server on lbrycrdd.
The easiest way to compile is to utilize the Docker image that contains the necessary compilers: lbry/build_lbrycrd. This will allow you to reproduce the build as made on our build servers. In this sample we map a local lbrycrd folder and a local ccache folder inside the image:
If you encounter any errors, please check `doc/build-*.md` for further instructions. If you're still stuck, [create an issue](https://github.com/lbryio/lbrycrd/issues/new) with the output of that command, your system info, and any other information you think might be helpful. The scripts in the packaging folder are simple and will grant extra light on the build process as needed.
CLion has not traditionally supported Autotools projects, although some progress on that is now in the works. We do include a cmake build file for compiling lbrycrd. See contrib/cmake. Alas, CLion doesn't support external projects in cmake, so that particular approach is also insufficient. CLion does support "compile_commands.json" projects. Fortunately, this can be easily generated for lbrycrd like so:
```
pip install --user compiledb
./autogen.sh && ./configure --enable-static=no --enable-shared --with-pic --without-gui CXXFLAGS="-O0 -g" CFLAGS="-O0 -g" # or whatever normal lbrycrd config
compiledb make -j10
```
Then open the newly generated compile_commands.json file as a project in CLion. Debugging is supported if you compiled with `-g`. To enable that you will need to create a target in CLion by going to File -> Settings -> Build -> Custom Build Targets. Add an empty target with your choice of name. From there you can go to "Edit Configurations", typically found in a drop-down at the top of the editor. Add a Custom Build Application, select your new target, select the compiled file (i.e. test_lbrycrd or lbrycrdd, etc), and then add any necessary command line parameters. Ensure that there is nothing in the "Before launch" section.
Contributions to this project are welcome, encouraged, and compensated. For more details, see [https://lbry.tech/contribute](https://lbry.tech/contribute)
We follow the same coding guidelines as documented by Bitcoin Core, see [here](/doc/developer-notes.md). To run an automated code formatting check, try:
`git diff -U0 master -- '*.h' '*.cpp' | ./contrib/devtools/clang-format-diff.py -p1`. This will check any commits not on master for proper code formatting.
We try to avoid altering parts of the code that is inherited from Bitcoin Core unless absolutely necessary. This will make it easier to merge changes from Bitcoin Core. If commits are expected not to be merged upstream (i.e. we broke up a commit from Bitcoin Core in order to use a single feature in it), the commit message must contain the string "NOT FOR UPSTREAM MERGE".
The `master` branch is regularly built and tested, but is not guaranteed to be
completely stable. [Releases](https://github.com/lbryio/lbrycrd/releases) are created
regularly to indicate new official, stable release versions.
The Travis CI system makes sure that every pull request is built, and that unit and sanity tests are automatically run. See https://travis-ci.org/lbryio/lbrycrd
Testnet is maintained for testing purposes and can be accessed using the command `./lbrycrdd -testnet`. If you would like to obtain testnet credits, please contact brannon@lbry.com or grin@lbry.com .
It is easy to solo mine on testnet. (It's easy on mainnet too, but much harder to win.) For instructions see https://github.com/lbryio/sgminer-gm and https://github.com/lbryio/lbrycrd/tree/master/contrib/mining
We maintain a mailing list for notifications of upgrades, security issues, and soft/hard forks. To join, visit [https://lbry.com/forklist](https://lbry.com/forklist).
