I am not familiar with YAC POS calculation. I see this line here
Each chunk of eligible coins has it's interest calculated based on the chunk's age in the range between 30 and 90 days.
Does it mean for POS generation if I have 100 YACs in the wallet for 1000 days I can only expect 100 * 90* 5% / 365 reward if a POS block is found? In PPC POS calculation the probability of finding a POS block is based on coin age capped by 90 days but the reward value itself is not capped. In the above example I would expect 100 * (1000 - 30) * 1% / 365 reward.
I think you are right. I will update the post.
Groko - that is a great post on yacointalk. I've been mining YAC since the launch, and I learned a few things from your overview. Thanks!
And I believe mhps is right - I think YAC caps POS at 90 days. So a 100 YAC transaction at 1000 days would produce the same interest as at 90 days (100 * 90 / 365 * 0.05 YAC = 24.65 coin years * 0.05 YAC => 24 years * 0.05 = 1.20 YAC gained).
Again the guide is very well written, but it maybe helpful to add an example, or two, of how the 5% interest is calculated. Things like the coin-year rounding down to the nearest whole year weren't initiative to me when I originally started. From the example above, I would have expected 1.23 YAC instead of 1.20 - it boggled my mind why all POS were 'rounded' to the lowest 0.05. I figure if we can save someone an hour of sifting through the forums, it will benefit the community.
Thanks aso118. I had lots of trouble figuring out what POS was all about, especially with the confusing way the YACoin client has been reporting earnings from POS blocks. I've been working hard to fix how the client reports POS earning. It sounds like a new release of the YACoin client is coming soon. If all goes as planned, the new client will have a transaction record that matches to the last decimal point how much YACoin is actually in your wallet.
After mhps's comment I dug down into the code and came to the conclusion mhps was right. That is, a 1000 day old chunk of 100 coins will get get 1000 days worth of interest. And there is no limit to the number of days. If you don't open your client for 10 years, and YACoin is still around in 10 years, then you will get 10 years worth of interest.
However, the probability of finding a POS block for those 100 coins started at a low point at 30 days, and increased gradually until the coins got 90 days old. After 90 days the coin's continue to accrue interest, but the probability of finding a POS block for those coins stays at a constant maximum probability from day 90 until day 1000. If a POS block were found on day 1000, I would expect the interest to be (100)*(0.05)*(1000)/(365) or 13.698.
but will be cool when done.