LoRaLib is Arduino library for LoRa modules based on LoRa chips by Semtech (SX1272, SX1276, SX1278) and HopeRF (RFM95, RFM96, RFM98).

Quick Links: Documentation for most common methods can be found in SX127x reference.
Some methods (mainly configuration) are also overridden in derived classes, such as SX1272, SX1278, RFM96 etc.
Status Codes have their own page.