Current command:
emv challenge --help
Executes Generate Challenge command. It returns 4 or 8-byte random number from card. Needs a EMV applet to be selected and GPO to be executed. usage: emv challenge [-hkaw] options: -h, --help This help -k, --keep Keep field ON for next command -a, --apdu Show APDU requests and responses -w, --wired Send data via contact (iso7816) interface. (def: Contactless interface) examples/notes: emv challenge -> get challenge emv challenge -k -> get challenge, keep filled ON