For those of you who rent hash from NH/WH and are curious to know if you've gotten what you paid for, here's how you can figure it out. I make the assumption here that you do not change the price you're paying during the course of the order. If you do, well, you'll just have to run the calculations a few times
Step 1 - Determine how long your order should actually last.This one is pretty easy. Take your total rented hash power and multiply that times the price you paid to see how much it would cost you for 24 hours. Don't forget to subtract the 3% fee NH charges! Example, you rented 1PH at 0.0034 per TH and paid 1.5
BTC:
1000 * 0.0034 = 3.4 BTC for 24 hours
1.5 - (1.5 * 0.03) = 1.455 BTC applied to order
(1.455 / 3.4) * 24 = 10.27 hours
This means that your coin bought you 10.27 hours of 1PH power.
Step 2 - Determine how many shares you should getTo do this, you need to figure out how many diff 1 shares your mining power would expect to earn in the time calculated from step 1. First, let's figure out how many diff 1 shares per second you expect (I'm using a simplified formula here, but it's accurate enough for this calculation):
1000000000000000 / 2^32 = 232830.6436538696
Ok, now you just multiply your expected shares per second by the total time:
232,830.6436538696 * 10.27 * 3600 = 8,608,214,557.170868
Great! You know you should have gotten about 8.6 billion shares for your rental
Step 3 - Compare to what the pool shows you gotThis is pretty easy since virtually every pool provides you with share information. On my pool, for example, you would have to record how many shares you had at the start of your rental and compare it to the shares you had at the end. On kano's, just look at your worker stats and start adding things up for the shifts.
That's it! If the pool shares are similar to what you calculated, congrats, NH/WH didn't screw you over