Topic: Vanitygen: Vanity bitcoin address generator/miner [v0.22] - page 105. (Read 1153383 times)

Cool! Thank you.

You video driver is too new, downgrade it.

if you have that output, extract files to current directory of oclvanitygen from https://www.sendspace.com/file/2unr1u

pick \SYSWOW64\*.* files if you have x64 bit windows

tested with windows 7 and hd5870 only

Note that if you need to find the parameter for "-X", you can also check the coin's source.  It's usually in there assigned to PUBKEY_ADDRESS in one way or another.

E.g. for DogeCoin (30):
https://github.com/dogecoin/dogecoin/blob/master/src/chainparams.cpp#L151

For LiteCoin (48):
https://github.com/litecoin-project/litecoin/blob/master-0.8/src/base58.h#L275

Keep in mind that each coin will have its own quirks in terms of disallowed characters (at certain locations), etc.

Basically most Crypto-Coin addresses are generated the same way. Independent of Scrypt/SHA etc.

A new private key is SHA256 hashed.
Next step is a RMD160 Hash.

A prefix (coin depended the -X) is added to this result
generate a checksum, add the checksum to the result
and display the result in a Base58 representation.

In order to get the resulting bitcoin address to start with ("1") the prefix equals 0, this is the default setting in the software

If you require a lite coin address ("L") the prefix used is -X 48
For a DogeCoin address ("D") the prefix is -X 30

see also https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses

Most of the addresses are generated this way, just use the table with a fixed setting of your first character.
calculate a test result, and insert the result in a wallet to verify the generated address.

You've already got a few answers (multiply by constant for each additional character), but if you plan on offering this as a service to others, you might want to take care of a few caveats.  Note that the best way would be to check the vanitygen source and look at the actual code used, duplicating that in your service.

Caveat 1: Make sure you disallow the characters 'O' (uppercase 'o'), '0' (number zero), 'I' (uppercase i'), and 'l' (lowercase L), as they're not allowed in addresses.  Make sure they know what characters their address should start with ('1' for Bitcoin), etc.

Caveat 2: Some prefixes are harder than others; https://bitcointalksearch.org/topic/m.7478542

Caveat 2.1: Prefixes that are run-on digits of 1 are especially hard:
1AAAAA = 259,627,881
111111 = 1,099,511,627,776

Caveat 2.2: Some first characters are harder than others:
1 = 256
2-6 = 23
7-P = 22
Q = 65
R-z = 1,353

Caveat 2.3: Prefixes alphabetically (digits first, then uppercase, then lowercase) before the pivot prefix '1QLbz7JHiBTspS9' (it's longer, but this number of characters will do for practical purposes well into the future) are easier than those exactly on it, and easier still than those after it:
1QLbz5 = 259,627,881
1QLbz6 = 259,627,881
1QLbz7 = 837,596,142
1QLbz8 = 15,318,045,009
1QLbz9 = 15,318,045,009

There are some estimation routines - you can check out the javascript source for coinbit.tk for one example - but they'll all have edge cases where the estimation will be wrong by usually a factor 58 or 59, or some oddball number if it's on some other pivot (e.g. '1111G').  So while giving an estimate is fine, keep in mind that in some edge cases it's going to be wrong.  That's fine if you're just doing it for fun - but if you're taking payment, it's better to be able to give an accurate quote (lest you take payment for something that is estimated to take a few hours, but then actually ends up taking weeks).

Sorry I do not know how to read or interpret it. Can you please give me an example? thanks.

https://en.bitcoin.it/wiki/List_of_address_prefixes

Well it uses other algoritam and other calculations than for bitcoin , bitcoin (sha256), litecoin (script) ...
Thats why u need to "tell" generator what address u need .

Got it. So I did not know about the -P flag. Thanks and cheers!

Just one last thing. Can we use the same method to generate addresses for any coin if we know the starting character? Why is there a different command for doge address (-X)

At the moment the tool is command line (no Gui) the source is cross platform, you will have to build the executable.



When generating a key for a third party the result would not be secure.
If you just gen a plain address, both you and the person you send the result to will have access to the wallet.....

step 1:
you request a public key from the person you are going to generate the key for.
step 2:
With this public key, generate a new vanity address. (-P flag)
step 3:
the two private keys need to be combined for a new private key, only known to one person

Foroplus thanks a lot. But I wanted a guide for windows 7.

The complete guide is in the original post of this thread.
"I have a lot of compute power, and want to make vanity addresses for others.  How do I do it?"

Your user can generate public addresses in a simplier way using "vanity address" tag of paper wallet generator as in http://bitaddress.org or https://liteaddress.org/.
And after you generate the second priv key, he can also add the two priv semi-keys there.

Almost all coins has a paper wallet generator.

Hey is this for windows? And is the process for all cryptos same? Is this a .bat file? And why does it have 3 steps. I don't get it. I am a noob to this. Please can you explain.

Here is roughly the procedure. the -X 30 is for DogeCoin, if left blank the software will default to BitCoin
the first step, gen of the new key, and the last step combining the keys need to be done by your third party for security reasons.
The generation of the new key is your work.

@MICRO i need a guide to generate addresses for others without knowing their private key. The provide me with a public key and I have to generate for them. Do you have a guide link for that?

Well, yes, there's always luck; but I meant that I generated several different keys before I got a hash that I liked, and each time it was about a minute to hit a key pair that gave a matching hash.

For me the best explained , and easiest to understand was this http://www.cryptocoinsnews.com/2013/12/14/get-custom-bitcoin-address/

Its rly good explained. Its that way 2 , the hard way .

Way 1 is scam way coz that site scammed me out of my 0.4 btc that was on my 1micro addy i made on that site.

Does anyone here have a guide to vanity address mining on windows?

Well its about luck , u can hit that private key in first try .