pleace check my artikel.
nama :ikhing
Bitcointalk : https://bitcointalk.org/index.php?action=profile;u=1053904
link :
1. https://steemit.com/ico/@ikhing/cashbag-cryptocurrency-cash-back
2. https://penzu.com/public/5d5e0b79

address : 0xaD658294eC1855A963Bf09D0b22c9619E95266e7

thanks dev