Kevin Durant is gonna "do it" for the rest of his life -- the NBA superstar just signed a contract with Nike that will keep him with the shoe giant until he takes his last breath.
The two sides announced the massive news on Friday ... saying they're both thrilled to be attached at the hip for decades to come.
"When I first signed with Nike, I couldn’t have dreamed of how far we’d go in this partnership," KD said, via Boardroom.