The proposed boxing match between Floyd Mayweather, a champion in four weight classes over his career, and UFC champ Conor McGregor has been the talk of the fight game for almost two years.
"The McGregor side is done", the Ultimate Fighting Championship (UFC) president said.
McGregor confirmed the contract for the boxing match in a statement to Themaclife.com. "We now await Al Haymon and his boxer's signature in the coming days".
Mayweather is refusing to take any questions about the McGregor fight until after Saturday night.
McGregor previous year obtained a boxing licence granted by the California State Athletic Commission, which would allow him to box in the USA state, as part of his pursuit of a cross-sport showdown with Mayweather.
This past December, McGregor's attorneys showed Bennett a video of the Irish champ boxing while attempting to gain a license.
That fight will involve his IBF super-featherweight world champion Gervonta Davis who defends his title this weekend against Liam Walsh in the UK.
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However, let's be clear - what we will be putting over is the type of leader Jeremy will be, and people will respect him, I think. He's got now just under four weeks to try to see if you can break through that image and it's going to be a very, very hard task.
The documents needed for McGregor to receive his license are related to medical exams and physical requirements.
In January, McGregor boldly claimed a fight between him and Mayweather would make $1 billion. "That's total disrespect to both of these fighters".
"I'm not saying the fight will happen, but I've got one side done", White said.
White said that McGregor has agreed to step in the ring with the undefeated Mayweather despite not having boxed competitively since he was a teenager.
The pair have been negotiating the bout between one of the best MMA fighters now, and the 49-0 boxing champ.
UFC lightweight champion Conor McGregor says he has signed a "record-breaking deal" to fight Floyd Mayweather Jr.