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41  Bitcoin / Project Development / Re: how to create user bitcoin wallet management feature on: January 30, 2015, 04:02:49 AM
I would like to add that there is also a third option:


Run a Bitcoin Thin Client such as Electrum.

There are a couple of very real advantages here.
1.  No need to download and maintain the blockchain,  Electrum will use SPV (A Bitcoin implementation that does not verify everything, but instead relies on either connecting to a trusted node)
However, you could download and maintain a your own bitcoind on a separate server, and have all your applications using Electrum communicate back to that server using SPV.

2.  The private key generation is secured using a long series of words (determined per wallet, i think), and other private keys and their BTC addresses are created deterministically.  Meaning, that if you have another instance of Electrum running with the same "wallet" the key generation sequence is identical.  Which is great, because you can place Electrum on the web server, and have a program that talks to it, getting new BTC addresses when necessary.  Note that most of the bitcoin packages these days have deterministic private key generation.

3.  The unspent output of a created transaction can be directed back to the address easily.  This is related to using Electrum as a type of user account BTC tracking software, which I am not sure how recommended that is.

Note this issue tracker on Bitcoin, which lauds people not to be lazy and simply use the accounts feature of bitcoind, but rather create a robust solution.

https://github.com/bitcoin/bitcoin/issues/3816

BTW,  This stuff is not the easiest in the world, and I would love to have plenty of money to guide a development team to create this.


Also:  Added a link to BopShop
https://bitcointalk.org/index.php?topic=285771.msg3797420#msg3797420  ->  this was bought out by Cointerra, then Cointerra went bankrupt.

42  Economy / Services / Re: [HIRING] content creators for Bitcoin tutorials(wallets, security) on: January 25, 2015, 11:37:03 PM
Roughly the pay might be starting at $2 per 500 words, depending on the quality.

You have GOT to be joking!


LOL!  Thats what I thought.... I just paid someone on freelancer to develop a blog post, and the cost was over $100.



43  Economy / Service Discussion / Re: Lets make something together on: January 25, 2015, 10:58:45 PM
Hey Coinbuddy,

I seen your request for working together on a bitcoin startup.  I have a LLC company in the US centered around Computer Services(bitcoin).

I have lots of knowledge in the technical aspects of Bitcoin, I started in July of 2013 mining bitcoin, and have been growing ever since, except for since this past August when everything fell through the floor.  I know basically everything about mining, and the stratum protocol, as I implemented a full pass through stratum proxy.

I currently for this past year have been trying to get away from mining, and looking at creating software services that support working with bitcoin, and bringing it to the masses.

My startup plan is to think about, and implement all the software needed to make it easy for a person to run a software package that sits on a server with a full bitcoin node, and manages User, transaction association, and provide the hooks for websites to leverage this backend software.  Because currently, the ability to tie/track a website user with bitcoin balances seems pretty difficult, and I am not sure if there are any public solutions.

Something that expands on this:  http://bitcointalk.org/index.php?topic=655722.0

Also, I've started a blog that will try to develop and document this idea.   http://coin-track.com


I personally see my skill set in software architecture, and back-end development.
44  Bitcoin / Project Development / Re: how to create user bitcoin wallet management feature on: January 25, 2015, 10:34:22 PM
I am currently spending a lot of time researching this out, and I'm finding that there are not very many options out there.
Cross Topic:  https://bitcointalk.org/index.php?topic=22079.0

Current Options:

1.  Run a bitcoin Full node.  Write a program to interact with the JSON RPC API. 
(note that the https://github.com/freewil/node-bitcoin code mentioned by coinableS is actually not an implementation of address accounting software, but a way to communicate that simplifies the JSON-RPC interface a little bit)
Also, I seen this software that doesn't seem to be maintained, but looks like a good start on address management:  https://bitcointalk.org/index.php?topic=408465.0

2.  Use a third Party API such as:     (However, even using a third party api, you should choose to manage your bitcoin private keys yourself, and which user/account these addresses are associated with.)  The API should only used for tracking/sending  payments to addresses. (The transaction should be signed with the address private key using api scripts that run locally on the Application server.  For greater security, the private keys should not be stored on the application server unencrypted, or not at all, because the transactions could be queued, and sent to another more private server for transaction processing.

- http://blockchain.info/: Well of course we all know this one.  Bitcoin only, access is via custom API.   (note the limitation of addresses given by coinableS)
- https://apicoin.io/: "Put the Bitcoin node in the Cloud!"  Bitcoin only, access is via custom API.
- http://www.blockcypher.com/: "Powering block chains in the cloud".  Bitcoin and Litecoin, homepage suggests they may add new coins, access is via custom unified API.
- https://helloblock.io/: "Focus on building Bitcoin apps, not infrastructure."  Bitcoin only, access is via custom API.
- https://chain.com/: "The Block Chain API for Developers"  Bitcoin only, access is via custom API.
- http://blockr.io/: BTC, LTC, TBTC, DGC, QRK, PPC, MEC, access is via custom unified API.
- https://www.blocktrail.com
- http://www.bitcoinmonitor.net/


Third Party API Topic:  https://bitcointalk.org/index.php?topic=655722.0




45  Economy / Service Discussion / Re: [IDEA/LIST] Hosted daemons / APIs on: January 18, 2015, 05:43:35 AM
I really think that people should be talking about this topic more.
46  Bitcoin / Project Development / Re: 5 BTC competition - LabVIEW app to get address from private key on: January 10, 2015, 11:42:54 PM
I'm a very experienced LabVIEW developer.  I'd be interested in downloading this function.
47  Economy / Exchanges / Re: Cryptsy and Ripples - very high risk on: December 07, 2014, 08:45:19 AM
I've been using Cryptsy for a long time, and their systems are very accurate.  Thing is, it takes lots of time to create and have an accurate trading system.  They are still rapidly growing, and have the associated customer service growing pains. Your issue will be handled, rest assured.
48  Bitcoin / Pools / Re: Stratum protocol discussion on: August 27, 2014, 02:40:56 PM
PLEASE PLEASE PLEASE

REALLY

mining.subscribe needs extension with a third parameter being the requested URL.

WHY IS THIS NOT IMPLEMENTED?
49  Economy / Services / Re: Please help me place my data on charts (HTML + javascript) Paying .1 BTC on: August 26, 2014, 12:22:44 PM
Hey Metalou,

I have received your work and it is great!    Payment will be pending soon.
50  Economy / Services / Re: Please help me place my data on charts (HTML + javascript) Paying .1 BTC on: August 25, 2014, 01:17:50 PM
Excel and JPeg should not be in this conversation.   I want a HTML file that is a derivative of the CoinBalance.html file that is located at my first link.  What I need is someone who is knows javascript to work on this.

A good javascripter should realize this, but I should mention it also.  The JSON data for the chart is located at: http://54.88.211.250:8080/ChartsService/Random
51  Economy / Services / Please help me place my data on charts (HTML + javascript) Paying .1 BTC on: August 25, 2014, 06:20:44 AM
Hey,

I have created a small one task webservice, and I wish to simply plot a coin Balance History.  I have gotten the JSON data to the loaded webpage (See the network resource Random), I simply need to format the HTML code of CoinBalance.html to plot the data on the charts.  Or at least I think that is what I need. 

The URL of the webservice is:

http://54.88.211.250:8080/ChartsService/Static/CoinBalance.html    Pull up the page and hit F12 and refresh to see the loaded page elements.

I want the Finished HTML Page to be a graph for each Coin that has at least 2 associated data points.

The Graph will contain Date, (see the variable date), Num coins, and USD Balance.  This data will simply be pulled from the provided JSON Data in Random.

I want a page with a lot of charts stacked vertically, and the chart should look like the following chart:  http://www.amcharts.com/demos/multiple-value-axes/

I don't necessarily need that exact chart, but it would be nice.

52  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][SPT] - Spots Thread - ScryptN | Cryptsy | Silver / Gift Card Stores on: July 19, 2014, 06:27:34 AM
What is the max coin limit for spots?  Didnt see it listed on the first page.
53  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][CRC] Craftcoin - Portable Minecraft Game Currency w. Economy Plugin on: July 03, 2014, 04:09:08 AM
The interesting thing is on this cryptocoin that there is a source code base in Java.  I'm not sure how many coin wallets that there are implemented in Java.
54  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][JPC]JackpotCoin#Unique JHA Algo#Ultra Fast Trans#1st True PoW/PoS Hybrid on: June 16, 2014, 05:38:40 AM
time for everyone to go vote again:

https://www.mintpal.com/voting#JPC
55  Economy / Computer hardware / Re: [WTS] 10,400khs+ Scrypt farm for sale. Also have (6) R9 290 GPUS on: June 09, 2014, 06:00:47 AM
What do the open rig frames look like? anything like this:

http://scryptfactorygear.com/product/aluminum-mining-rig-chassis/

What brand are the r9-290's?
56  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN][JPC]JackpotCoin#Unique JHA Algo#Ultra Fast Trans#1st True PoW/PoS Hybrid on: June 09, 2014, 02:58:06 AM
Everyone go vote again!

https://www.mintpal.com/voting#JPC
57  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: [ANN] BETARIGS.COM - Cryptocurrency cloud mining - rent your rig, get more! on: April 18, 2014, 08:41:11 PM
OK,  so I was trying to connect slush's stratum proxy to the betarigs pool, and I was having no success.   The mining proxy would connect, then promptly disconnect.  I even tried to connect to a username on a rig that was currently rented, ( to get around the feature where betarigs disconnects the pool when no one is renting)

Anyone have this problem, or is anyone successful running a local mining proxy that is connected to betarigs?  

BTW, I can connect the mining proxy fine to other pools.
58  Economy / Computer hardware / Re: [WTS] Lots of GPUs, MBs, PSUs. $9 and lower USB Risers!!! on: March 21, 2014, 03:56:45 AM
I'll pay 2 BTC for 160 of the USB risers and both of the V1000 Cooler Master power supplies.
59  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] TAKEICOIN - SHA256 - Kimoto Gravity Well - Media Machine on: March 08, 2014, 02:32:05 AM
This should be rebranded as tacky coin.   Maybe the theme of this coin should be rebranding.

Or maybe TACK Coin,  with A thumbTack Logo.
60  Other / CPU/GPU Bitcoin mining hardware / Re: Motherboard designed for mining, and better riser cables in this thread. on: February 25, 2014, 07:07:42 AM
With those longer riser cables, 30cm... I had so much problem, but then i wrapped alumimum around the cable and placed plastic wrap over the aluminum, and some of my problems went away.

Really, aluminium? What problems went away ?


I bought some 30 cm risers from hash rate store, and I think that the risers are the weakest link. I would experience on bootup of the motherboard, a single r9-290x would all of a sudden have the fan spin up to max and the computer would hang in the middle of booting up, requiring a hard restart.  After fiddling with the risers for a while, I wrapped aluminum foil around the cable, and then placed plastic wrap over that to prevent shorting.  Seemed to help a lot, eliminating the hang on boot problem, but i also noticed that just moving the riser cable a little before bootup could also cause the boot hang to happen.
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