Percentage of NSR Actively Minting

Chronos 2014-11-16 01:02:59 UTC #1

According to network statistics, the current proof-of-stake difficulty is 0.000269. It should be possible to deduce, from this number, the approximate percentage of NSR that is actively minting. What is the formula to calculate this?

Thanks!

Cybnate 2014-11-16 08:12:42 UTC #2

Is it similar to Peercoin’s or has NuBits different code?

My best bet on a number of factors is that currently about 200 to 250m Shares are minting. This based on the number of blocks I’m minting with my share and the Shares sold. This is about 40% of the Shares sold according to the last update and 20-25% of all Shares. The PoS difficulty is based on all Shares. I haven’t worked out a formula yet, so a sneak peak in the source code would help.

tomjoad 2014-11-16 15:00:27 UTC #3

Based on the block minting stats I’ve seen I estimate between 23-28% of total NSR are minting, so it looks like we’re on the same page.

Ben 2014-11-16 15:37:07 UTC #4

What portion of the source do you need access to? I’m allowed to share in both general and specific (in limited quantities) details.

Chronos 2014-11-16 20:33:16 UTC #5

Interesting. To what stats are you referring?

tomjoad 2014-11-16 21:38:28 UTC #6

Just personal observation of the amount of blocks I’m solving with my NSR holdings relative to the total NSR supply. Same methodology as Cybnate is using.

Cybnate 2014-11-17 08:00:57 UTC #7

That part of the code where the formulae is used to calculate the difficulty, not sure if I can be more specific. The objective would be to calculate the numbers of shares actively minting based on the difficulty. Couldn’t find the Peercoin example after a quick search, but I believe someone pulled that a couple of months ago.

Current Proof of Stake Difficulty

Ben 2014-12-05 18:22:44 UTC #8

I’ll look into seeing if that’s code I can share. I expect it is, but I won’t know until I get a chance to dig in.

@sigmike may have readier access to it (or he may be able to give you the specifics without requiring the code).

sigmike 2014-12-06 08:59:57 UTC #9

The code is the same as Peercoin’s:
https://github.com/ppcoin/ppcoin/blob/master/src/main.cpp#L914-L923 (we just removed the floor below the highlight).

This is the calculation of the next “target” from the previous target and the time between the 2 last blocks. The target is the maximum allowed value of a hash. So to find a PoS block your hash must be below the target: https://github.com/ppcoin/ppcoin/blob/master/src/kernel.cpp#L364-L365 (the target is adjusted by the amount of coins).

To convert the target to the difficulty here’s the code: https://github.com/ppcoin/ppcoin/blob/master/src/bitcoinrpc.cpp#L61-L90