[al-husni-HUSSAINI-RAHEEMI]

i wanted to know about its origins-few claim its connection to IMAM JAFFER AS SADIQ(radhiallahuanhu),others claim its been in existence from the time of HAZRATH NUH(alaihissalam).also,i read on one post that IMAM MAHDI shall posses an ilm(knowledge of ilm-e-jafr which was transferred through the 12 imams) that he shall reveal to the ummah(according to sufi belief it says),does it have anything to do with ilm-ul-adad?