def solve(self):
    self.rehash()
    target = uint256_from_compact(self.nufos)
    while (self.sha256 > target):
        self.nNonce += 1
        self.rehash()
def solve(self):
    self.rehash()
    target = uint256_from_compact(self.nufos)
    while (self.sha256 > target):
        self.nNonce += 1
        self.rehash()