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I have an app, users receive worthless points as a way of rewarding experience.
You cannot do anything with that, I could sell a premium user thing, but I don’t like the idea.

I thought of creating a crypto coin, so I just have to mine, and give away all coins mined to the users, and that’s more interesting.
It might be as worthless as the virtual points, but just the possibility makes it more fun.

I believe the future is in proof of stake, Etherum is going there, bitcoin I think would go there if it wants to be a technically usable payment system etc.

So what PoS or similar coin I can go on Github, clone, change a few things, and start mining?
Is there one that does not store the whole transaction history? Simple, usable, lightweight.

I guess this might be seen as “polluting” the crypto world, but keep in mind I’m not going to announce it anywhere else than my app, it would be an internal fun project, will go nowhere, but in case it went out there, it would be only because of external interest.

So I have a project where when a wallet is imported it creates addresses from the private keys, but I’m using a PHP script that I found and it's terrible slow, needs almost 4 seconds to create one address! 

I was searching and I found vanitygen which apparently makes like millions of addresses every second, that’s some difference…, but that’s only for creating vanity addresses or random, but not from a private key.

I’ve been looking and I’m not finding anything that works or that I can make it work. I just one something simple like vanitygen that I can call from the command line.

PD: I installed Python 2.7 working with ecdsa, the scripts I found didn't work with 3.6. Now I'm down to 0.5 seconds, not bad, but still if I compare it with what software like vanitygen can do seems like a lot. I would like to find something better. (I'm calling Python thru the command line from PHP)

PD2: I'm trying to compile vanitygen with mingw, to see if I can mod it later, but in Windows that’s just a nightmare. Lots of errors, and I'm not to wise at this.

So I want to check bitcoin addresses on my server app, and I don’t want to rely on third parties like blockchain.info.

What I want is a list of all bitcoin addresses ever used, and if not possible, a list of all addresses with balance.
I don’t need to know the balance, it’s just to not test them all in the blockchain, wich I think thats like 10 seconds.
Is there anywhere I can download a list like this?

Somebody said “Probably you can get them by modifying bitcoinrpc source code”, but I don’t know how to do that.

This graphic https://blockchain.info/charts/n-unique-addresses What is showing? the number goes up and down so I guess is the number of addressees with balance? Or is it the number of addresses per block?
How many addresses ever used do you think there are in the blockchain?