Not sure how this hasn't been reported. Dana White was on Colin Cowheard's show Thursday and reported final details are being ironed out with Conner and that he expects to be able to send the contract details to Mayweather possibly this upcoming week. Purse numbers are estimated to be $100M for Floyd and $75M for McGregor according to Dana White but would depend on PPV numbers.
http://mmatorch.com/2017/04/21/thurs...coes-analysis/
the news about the fight is near the end of the article