Satatapa/Satyatapa was a sage mentioned in Varhapurana who was earlier a hunter. The main concept of this Smriti is- ‘Whether brief or detailed, if karma is done as specified in one’s Grihya sutra, it is deemed complete. In Srouta karmas, whatever is specified in all branches is appropriate for everyone. In Grihya karmas whatever is specified in all smritis is generally applicable to everyone. Just as the rules for Srouta karmas are compiled from all branches, Grihya karmas are specified by compiling from all smritis.