if (maintenanceStakePerBlock > currentStake) {
    // skip
    staker = nextMaintenanceStaker[staker];
    currentStake = getMaintenanceStakerStake(staker);
} else {
    startBlock += currentStake / maintenanceStakePerBlock;
    staker = nextMaintenanceStaker[staker];
    currentStake = getMaintenanceStakerStake(staker);
}
if (maintenanceStakePerBlock <= currentStake) {
     += currentStake / maintenanceStakePerBlock;
}
staker = nextMaintenanceStaker[staker];
currentStake = getMaintenanceStakerStake(staker);
