LnVault is implemented as a SpigotMC plugin that is compatible with both SpigotMC and PaperMC.
TL;DR; Source code is located here –> Github
The following tools are required for compilation
Netbeans is the preferred IDE by the LnVault developers.
lnvault@home:~$ git clone https://github.com/LnVault/lnvault-plugin.git
lnvault@home:~$ cd lnvault-plugin
lnvault@home:~$ mvn package
The finished plugin jar will be located at ./target/lnvault-1.0-SNAPSHOT.jar