The internet says that GVAS stands for Game Variable and Attribute System. Conversions to JSON are LOSSLESS but there is a caveat. Python only has 64-bit floating point values, so 32-bit values can ...

This Python script converts a Proxmark3 MIFARE Classic JSON dump (FileType: “mfc v2”) into a text-based .nfc file suitable for Flipper Zero. It reads the JSON file, processes UID/ATQA/SAK data, and ...