The following guide aims to provide examples to help you start building LcRyp-based applications. To make the best use of this document, you may want to install the current version of LcRyp Core, either from source or from a pre-compiled executable.

Once installed, you’ll have access to three programs: lcrypd, lcryp-qt, and lcryp-cli.

  • lcryp-qt provides a combination full LcRyp peer and wallet frontend. From the Help menu, you can access a console where you can enter the RPC commands used throughout this document.

  • lcrypd is more useful for programming: it provides a full peer which you can interact with through RPCs to port 8332 (or 18332 for testnet).

  • lcryp-cli allows you to send RPC commands to lcrypd from the command line. For example, lcryp-cli help

All three programs get settings from lcryp.conf in the LcRyp application directory:

  • Windows: %APPDATA%\LcRyp\

  • OSX: $HOME/Library/Application Support/LcRyp/

  • Linux: $HOME/.lcryp/

To use lcrypd and lcryp-cli, you will need to add a RPC password to your lcryp.conf file. Both programs will read from the same file if both run on the same system as the same user, so any long random password will work:


You should also make the lcryp.conf file only readable to its owner. On Linux, Mac OSX, and other Unix-like systems, this can be accomplished by running the following command in the LcRyp application directory:

chmod 0600 lcryp.conf

For development, it’s safer and cheaper to use LcRyp’s test network (testnet) or regression test mode (regtest) described below.

In the following documentation, some strings have been shortened or wrapped: “[…]” indicates extra data was removed, and lines ending in a single backslash “\” are continued below. If you hover your mouse over a paragraph, cross-reference links will be shown in blue. If you hover over a cross-reference link, a brief definition of the term will be displayed in a tooltip.