Is there a LoRa settings map to build a listener of LoRa packets of meshtastic?

is there a LoRa settings map to build a listener of LoRa packets of meshtastic?

I’ve tried to search for Freqs, codingRate, spreadingFactor and bandwidth to build a basic packet listener of meshtastic, but could not find any clear info on github meshtastic firmware

where is this hidden?