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1  Bitcoin / Wallet software / Blockchain.info unspent API on: August 07, 2013, 07:41:01 PM
Blockchain.info's JSON api returns a transaction in a different encoding than the HTML version.

https://blockchain.info/unspent?active=1L1HUjdZjueR4mmcRNWkGp9rKLBCYWfkZn&format=html

The html formatted api returns a transaction id of: 7e5bdbc38649b967c415b4ab4d2d8a2096290f9ddec543c52ce780d0fe1b1002


https://blockchain.info/unspent?active=1L1HUjdZjueR4mmcRNWkGp9rKLBCYWfkZn&format=json

The json formatted response returns a transaction hash of: 02101bfed080e72cc543c5de9d0f2996208a2d4dabb415c467b94986c3db5b7e

What encoding is blockchain.info using in the HTML formatted list of unspent outputs?
What encoding is returned in the JSON formatted response?
What is the easiest way to convert between the two?

I would like to be able to convert the unspent hash returned by the JSON API into the same encoding used to search the blockchain.info HTML for a transaction.

Much thanks in advance to anyone who can help!
2  Other / CPU/GPU Bitcoin mining hardware / What do I do with these? on: May 31, 2013, 03:04:05 AM
This is well beyond the realm of my knowledge but somebody I know has a bunch of hardware sitting around, including:

http://www.vistek.ca/store/ProVideoEditingSoftware/234663/blackmagic-design-intensity-pro-pcie-1-lane.aspx

He wants to know if these are of any value for mining anything (bitcoin/litecoin/whatevercoin).

Unfortunately google didn't turn up anything on these cards so I'm guessing they aren't that useful.

But one never knows...
3  Bitcoin / Bitcoin Technical Support / Proper API Parameter Formatting on: September 11, 2012, 06:42:38 AM
Working on a little PHP project I got going here. As a hobbyist I'm not a pro by any means, and I was unable to find specific information on this.

Starting with the example code from the Wiki:
Code:
$bitcoin = new jsonRPCClient('http://user:PW@127.0.0.1:8332/');
 
  print_r($bitcoin->getinfo()); echo "\n";

Obviously works as does, for example:

Code:
print_r($bitcoin->getaddressesbyaccount('user')); echo "\n";

However this doesnt work?:
Code:
print_r($bitcoin->getrawmempool()); echo "\n";

JSON is new for me so is it something about the formatting of the parameters being passed to the API?
But getrawmempool needs no other paramaters just as getinfo doesn't... or does it? Maybe its my client?

Also other API calls seem to be hit and miss, so clearly I'm missing something important and probably obvious... would love a little help Smiley

Client Info:
Code:
Array
(
    [version] => 60300
    [protocolversion] => 60001
    [walletversion] => 10500
    [balance] => 2.6432
    [blocks] => 198267
    [connections] => 8
    [proxy] =>
    [difficulty] => 2694047.952955
    [testnet] =>
    [keypoololdest] => 1312129826
    [keypoolsize] => 101
    [paytxfee] => 0
    [errors] =>
)
4  Bitcoin / Meetups / [ANN] Vancouver Meetup @ launchacademy.ca on: July 20, 2012, 07:45:37 AM
I am pleased to announce our next meetup is going to be in the launchacademy.ca space. Anyone in the area is more than welcome to join us!

http://meetu.ps/fDJyg
5  Bitcoin / Development & Technical Discussion / New Sidechain Concept on: July 18, 2012, 05:00:56 AM
Asymmetric Co-Dependant Cipherblock Sidechain

http://goo.gl/O1cww

Attached is an improved solution for bitcoin sidechains. I believe that some type of flexible sidechain framework could expand bitcoin considerably. The inspiration for this paper comes from both the Namecoin and DIANNA projects.

http://bot-bit.org
http://dianna-project.org/wiki/

Under current conditions this framework is not workable and as such has not been fully developed. However it will work if you assume the following:

The ability of bitcoin transactions related to sidechain transactions to be disseminated over the bitcoin network, could be restricted.

Given that, this sidechain framework attempts to do the following:

Quote
Develop (a) sidechain framework that

    Does not require seperate currencies
    Does not need full or significant adoption by the bitcoin network
    Does not mirror the bitcoin blockchain block for block
    Uses and is dependant on bitcoin


I post this here in hopes that there are further improvements possible to this framework, or saving that, it may inspire development of related project or ideas.

TLDR:

If you made a sidechain out of broken transactions and blocks with missing keys, and placed those keys in the bitcoin blockchain, you could make the sidechain dependant on bitcoin.

If you broke bitcoin transactions in the same way, placing keys to them in the sidechain transactions or blockchain, then you could make bitcoin transactions dependant on the sidechain.

If you could do both those things then sidechain blocks wouldn't have to mirror the blockchain, you wouldn't need a seperate currency, you wouldn't need proof of work, it wouldn't need significant acceptance, and it would be immune to takeover by the bitcoin network.
6  Bitcoin / Bitcoin Discussion / [ANN] Vancouver BC Bitcoin Meetup on: May 31, 2012, 04:09:44 AM
Wanted to let those in the Vancouver area that we are having our next meetup this coming Tuesday. We are always looking for more people whether you are new to bitcoin or not, come join us for discussion, ideas, and a good time.

http://www.meetup.com/bitcoinvan/


Cheers.

7  Bitcoin / Bitcoin Discussion / bitcoin day? on: February 06, 2012, 05:24:31 AM
Is there a bitcoin day?

It would be nice to have one I think.  We could all give gifts of bitcoin to our friends and family, like christmas, but better gifts Tongue

or maybe just make a point on christmas to give the gift of bitcoin?

If there isnt a day, lets pick one Cheesy
8  Bitcoin / Project Development / Bitcoin dev in 604/778 needed on: January 26, 2012, 03:26:47 AM
If you are a programmer or developer who knows the bitcoin client we are looking for you.

We are soon entering development phase on a great new bitcoin business.  All details to be discussed privately.

The work we need done:

Hack the heck out of the bitcoinj client (or whatever version you like!)

Thanks
9  Economy / Trading Discussion / is this for real? on: January 19, 2012, 10:41:11 AM
This was an add on bitcoincharts.com

http://bluehedge.ca/
10  Bitcoin / Bitcoin Discussion / Stabilize bitcoin prices on: October 20, 2011, 04:26:30 PM
Been away for a while and was stunned to see bitcoins trading at under 2.50 USD.

I would think it would be generally accepted that price stability is desired in making bitcoin competitive as an alternative currency.

However the current difficulty algorithm which attempts to maintain a constant generation of bitcoins inherently creates price instability.

Since price is a function of supply and demand, and the current system does not allow supply to fluctuate (rate of bitcoin generation) the result is that prices must take the full brunt of change in demand.

If we look at a commodity trading in the marketplace, an increase in price makes it more profitable to produce that commodity. This increase in production creates more supply which will bring prices down (and vice versa).  In the world of bitcoin, there is never an increase in the rate of supply.

After having read the Satoshi white paper and the bitcoin wiki I find no philosophical reasoning behind the limiting of the rate at which bitcoins are generated.  It would seem that this limit is simply a result of the method by which bitcoins are created, ie. the rate can not increase substantially without creating problems with the block chain (here my understanding may be quite limited).

Is there any way to create a method by which the rate of bitcoin generation could fluctuate?  For instance having a mining difficulty that doesn't change based on the number of miners, but simply scales until the bitcoin limit is reached?

I was surprised to not find any threads specifically discussing this topic.  If I have missed them please refer me Cheesy
Or have one of the bitcoin competitors addressed this issue?

11  Bitcoin / Bitcoin Discussion / Bitcoin is not anonymous on: July 25, 2011, 09:51:26 AM
Quote
Bitcoin is not inherently anonymous. It may be possible to conduct transactions is such a way so as to obscure your identity, but, in many cases, users and their transactions can be identified. We have performed an analysis of anonymity in the Bitcoin system and published our results in a preprint on arXiv.

Reactions from those knowledgeable in related fields?

Headline:

An Analysis of Anonymity in the Bitcoin System

http://anonymity-in-bitcoin.blogspot.com/2011/07/bitcoin-is-not-anonymous.html
12  Bitcoin / Bitcoin Discussion / Secure Password Generation on: July 24, 2011, 02:37:07 AM
While setting up some bitcoin security measures and opening up some trading accounts i was having trouble thinking up passwords.  After googling for a few minutes I realized that there is no way you can trust a piece of software or a website to generate a password for you.

I was then reminded of diceware, the most secure password generation program in existence. (hint its not a computer program)

http://world.std.com/~reinhold/diceware.html

I have used this before to generate passphrases that are totally immune to any subconcious thought patterns I may have.

This is like superspy type level of security stuff (I like to pretend I'm Jason Bourne) so its kinda fun too!

edit: I realize this is a bit dated (not unlike myself) so any improved methods would be appreciated!
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