This library is no longer maintained, it has been replaced by new JavaScript / TypeScript DCore SDK at:
https://github.com/DECENTfoundation/DCoreJS-SDK
https://github.com/DECENTfoundation/DCoreKt-SDK
https://github.com/DECENTfoundation/DCoreSwift-SDK
https://github.com/DECENTfoundation/DCorePHP-SDK
If you are looking for original instructions for this library please see https://github.com/DECENTfoundation/dcorejs-lib/tree/master/old-instructions