Verifying a bitcoin address signed message.

[Bwen]

Example of the 3 components that you get after singing a message with a bitcoin client:
http://coinig.com/?adr=18neTpQ5MWnXg4n4rpoK5TgxXjEVcg2MYR&msg=rmh%40unmitigatedrisk.com+-+my+voice+is+my+passphrase+authenticate+me&sig=G0d6BnQem1gT4nd9esfsEyn1k%2FGfYAxDkNJmkNvmz8wCOI2Ncw9DvIcyP7OJcEvWbUHQNIBFK3V8wYdnhEFhYHI%3D

This exception is thrown: https://github.com/ionux/phactor/blob/master/src/Signature.php#L350

Because the signature is not the right format according to the Verify method.

It would be nice if it could detect the signature and convert it automatically to the proper format to be able to verify it. Or multiple functions supporting different signature format...

Thanks again!

[starsoccer]

agreed, its not to hard to do, just really a matter of some code to figure out the bitcoin address, the message, and the signature. The biggest issue is if the message has a bitcoin address in it.

[ionux]

Thanks again for this issue report! I will write the needed conversion functions and patch the library to support these various formats.

[starsoccer]

cool, any word on multisig?

[ionux]

Yep, I'll be pushing that update soon including mnemonic support.

[starsoccer]

cool cool, I am very eager for it. Any ETA?

Also do you have a donation address in the readme for tips ;)

[ionux]

Glad to see the excitement! It will be Real Soon Now(tm).

Thanks for the tip offer, too! I'll have to check because I'm honestly not sure what my employer's stance is on tipping. I tell you what though - just had an idea that might be fun. If you'd like to donate some bitcoin, check out some seriously worthy causes here: http://bitgivefoundation.org/charitable-campaigns/. Come back here and post the donation info (whatever the amount!) and I'll name the next major Phactor release after you: Phactor 1.1.0-starsoccer. :)

Hmmm... maybe I'll a bounty program but for donations to BitGive in exchange for upcoming features after this next release, of course... You've given me some ideas, @starsoccer!

[starsoccer]

oh I did not realize this was being done as a job. In any case I do not mind donating for the great work you are doing.

Excuse me for trying to pry more info, but will the multisig support raw transaction creation as well as raw transaction signing? Those are the main features I am interested in. I already have a light php script that creates multisignature addresses in all php that I found a while back.

I would really be interested in talking further about your ideas and my project over IRC or skype if your free/bored

[ionux]

Well, it's kind of both. Personally, I seriously love math! I wrote all of the math code for our new PHP library to support BitPay's new cryptographically-secure API and realized later on that we needed to move to a more modular approach from a maintainability perspective.

A side project of mine is an arbitrary precision math class where I've been tinkering with various algorithms to see how they work, how fast they are, which ones are better at X, Y or Z, etc... One day I was thinking that, if we needed a modular EC math library for work, maybe I could start something on my own and then use it at work if it meets our needs. So this project was kind of born out of my love for math and pure, single-purpose, maintainable code. Not saying it meets any of those standards but it's a work in progress... Lol :)

Speaking of, I'd love to see your code sometime and maybe even use some of it here, if that's possible. Feel free to submit any issues/PR's/tips/tricks/hints any time because it sounds like you have some good ideas and a solid understanding of bitcoin transactions. Shoot me your contact info if you want and let's set up a time to talk: rich@richmorgan.me. I mainly use Google Hangouts but IRC works too. Very interested in hearing about your project and ideas!

[starsoccer]

Haha, very nice.

Sure I dont mind sharing some code, I was trying to find the original code I used as I have modified it quite a bit to fit my personal needs, but basically it will create a multisig address from the keys input and the number of required keys and give me a multisig address and redeemscript in all php using the ecc-lib library

[ionux]

Hey @Bwen and @starsoccer - just published a maintenance release v1.0.5. It adds a lot of fixes and some new functionality but it's mainly a preparation release for 2.0.0 where the good stuff you guys are looking for is being added! There were just a ton of commits since 1.0.4 so I thought it would be good to release this in the interim. The next version will be coming in the next few days! Take a look at this release and let me know if you guys experience any bugs: https://github.com/ionux/phactor/releases/tag/v1.0.5

[Bwen]

any ETA on the message signing ?
Is it gonna be included in the 2.0.0 ? Aka: in the next few days.

[ionux]

Yep, in the next few days for sure!