static const int64 nTargetTimespan = 7 * 24 * 60 * 60; // one week
static const int64 nTargetSpacingStake = 10 * 60; // ten minutes
static const int64 nTargetSpacingWorkMax = 2 * 60 * 60; // two hours
-static const int64 nMaxClockDrift = 2 * 60 * 60; // two hours
//
// minimum amount of work that could possibly be required nTime after