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1  Bitcoin / Development & Technical Discussion / C-Lightning Nodejs RPC Client on: July 18, 2018, 11:26:22 PM
Just released a RPC client for C-Lightning

2  Bitcoin / Bitcoin Technical Support / Bitcoin-qt crashes after start up on: September 18, 2017, 01:24:50 AM
Installed new version of bitcoin-qt 0.15.0 on windows 10 64-bit and now it crashes every time i start it after it finishes loading the blockchain.

last few lines of debug:

2017-09-18 01:16:35 Bound to [::]:8333
2017-09-18 01:16:35 upnp thread start
2017-09-18 01:16:35 Bound to
2017-09-18 01:16:35 init message: Loading P2P addresses...
2017-09-18 01:16:36 Loaded 63020 addresses from peers.dat  448ms
2017-09-18 01:16:36 init message: Loading banlist...
2017-09-18 01:16:36 init message: Starting network threads...
2017-09-18 01:16:36 dnsseed thread start
2017-09-18 01:16:36 addcon thread start
2017-09-18 01:16:36 opencon thread start
2017-09-18 01:16:36 msghand thread start
2017-09-18 01:16:36 net thread start
2017-09-18 01:16:36 init message: Done loading
2017-09-18 01:16:36 GUI: Platform customization: "windows"
2017-09-18 01:16:36 GUI: PaymentServer::LoadRootCAs: Loaded  58  root certificates

What to do next?


This is the debug in visual studio:

Unhandled exception at 0x000000000134450C in bitcoin-qt.exe: 0xC0000005: Access violation writing location 0x0000000002600FF8.

Assebly Stack:
000000000134450C  call        qword ptr [21FE014h] 

3  Bitcoin / Bitcoin Discussion / Ransomware Cerber Decryptor - Follow the coins on: May 04, 2016, 01:19:55 AM
A local small business was infected with the ransomware, Cerber Decryptor.  I sent the coins for them and they were able to decrypt their files.  The address the coins were sent to was 14rKSWF7qQquUWHfmEHzCod71jB4SsVS6B

Beware if you receive coins that originate from this address as they are from a criminal activity.  If anyone can eventually identify these people or person, please turn them in to authorities.


4  Bitcoin / Development & Technical Discussion / Why do I get a dust error when my output is 2500 Satoshis on: January 25, 2016, 06:09:35 AM
trying to send a transaction with one 2500 satoshi  output (P2PKH), one P2PKH input and one op_return output with 2500 satoshi fee.  Won't send in sendrawtransaction RPC on bitcoin-qt 11.2.

Get "dust" error.  I thought the minimum output was much lower than 2500 satoshi.

Is this a bug or or something else? What am I missing?

using bitcoinjs-lib to build transaction.
5  Bitcoin / Bitcoin Discussion / Old school blockchain indexer on: March 15, 2015, 06:45:29 PM
This is how they indexed the block chain in the olden days  Grin

6  Bitcoin / Project Development / Google Cloud Blockchain Datastore on: February 27, 2015, 09:24:56 AM
I am testing out a blockchain parser I wrote for the google cloud datastore.
It should query very fast once I optimize the query functions. 
All pubkey hashes are indexed so it could be used to serve light wallets or it also could be used for commercial bitcoin or other blockchain uses.

Google datastore is expensive to do all the indexing and write ops($100 month  + $1500 to load up chain). I could write an API library and for a small fee,anyone could access it. 

Is there any interest in something like this?
7  Alternate cryptocurrencies / Altcoin Discussion / BIP32-Multi-currency Javascript Wallet on: August 29, 2014, 12:21:32 PM
I have developed a BIP32 based javascript wallet that is currently in late alpha stage of development. It currently supports Bitcoin,Litecoin,Namecoin,Devcoin,Dogecoin, iXcoin and I0coin.

I will be adding more when requested by enough users.

It currently can send and receive coin, display transactions.  All wallets are deterministic and are generated from one seed key and password.

The official thread for discussion is at

I am hoping some people can try it out and help with testing, bug reporting and feature suggestions.

You can try it out at

The cert is self signed for now, so you will see a warning.  Post or PM me with any problems.

8  Bitcoin / Wallet software / [OFFLINE] DjsWallet - BETA - BIP32 Based JavaScript Wallet - Multiple Currencies on: August 27, 2014, 04:03:10 AM
    - Hello Everyone -

    Looking for Beta testers of a new BIP32 Based JavaScript Wallet.



Deterministic javascript Wallet

Now With Full Namecoin support including name operations

Wallet is based on a customized version of bitcoinjs-lib which you can see here:

Private Keys could be reconstructed from repository library, master key and password. (Not easily as of now).

This wallet currently supports Bitcoin,Namecoin,Litecoin,Devcoin,Dogecoin,iXcoin and i0coin. (More can/will be added. Send me suggestions and why)

Only advanced browsers are supported. (IE 11+, Chrome, Firefox).

Deterministic address generation so no need to backup wallets.


Use only for testing with small amounts of currency value.

You can try it out at  

Please Post Bugs And Suggestions

Also looking for sponsors and partners. PM me.

Coming Soon:
  • Formating
  • Message Signing
  • QRCode Support
  • Custom Transactions
  • Automatic updating of transactions and balances
  • Detailed Transaction Information
  • Instructions / FAQ / General Info
  • Market Prices

  • Code clean up (On going...)
  • does not clear old unconfirmed transactions
  • does not wait for 100 confirmations on mined coins before trying to spend them
  • can't add tag to change addresses
  • can't add tag to newly generated addresses
  • address table overflows sometimes



Q: What is a hierarchal deterministic wallet?
A: It is a “crypto-currency “ wallet that generates all private and public keys from a single seed and is organized into a tree structure which allows the entire or partial sharing of the wallet with different systems. See the BIP0032 wiki for more detail.

Q: What is the JavaScript part?
A: The JavaScript is the scripting language built into all modern browsers that the wallet is written in. All of the wallet cryptographic functions are run in the browser. Only transaction data is sent to and retrieved from our servers along with a hash of the seed data. This hash acts as a user id to prevent spamming of the system and is registered with our servers when creating the seed.

Q: How can I recover my password?
A: Sorry, no password recovery functions are available. We do not store or control any usable part of your wallet. It is up to you to remember and secure your password.

Q: How can I recover my seed key?
A: Sorry, again. Make sure you bookmark your seed key and print a copy of it too. Your seed key and password contain all the data used to generate your entire wallet.

Q: What if your site shuts down? How will I recover my wallet?
A: The underlying code is open source and can be used to generate your private keys and import them into another client. We use a modified version of bitcoinjs-lib and it can be downloaded here:

Q: How does the wallet know my password is correct?
A: Key data is hashed with the password and part of that hash is embedded into the key and acts as password verification.

Q: What crypto-currencies does it the wallet support?
A: Currently Bitcoin, Namecoin, Litecoin, Devcoin, Dogecoin, Ixcoin and I0coin are supported. Additional blockchains will be added when requested by enough users. Only Bitcoin,Litecoin and Dogecoin currently have official BIP 0032 version ids. Other coins version ids have been created by us to allow BIP 0032 functionality.

9  Alternate cryptocurrencies / Altcoin Discussion / Namecoin BIP32 VERSION Bytes on: July 09, 2014, 04:10:07 PM
I am making a BIP32 wallet for Namecoin and needed to come up with some version bytes that made sense

Private: 0x01c5c63d  = "Nprv" base58 key prefix
Public: 0x01c5ca77 = "Npub" base58 key prefix

10  Alternate cryptocurrencies / Altcoin Discussion / How were BIP32 version bytes determined? [SOLVED] on: July 09, 2014, 12:54:36 AM
BIP32 version bytes for public and private keys are

PUBLIC = 0x0488b21e
PRIVATE = 0x0488ade4

How were these determined so that the prefixes of extended keys start with "xpub" and "xprv" ?

Was it guess and check?

I want to come up with some version bytes for some altcoins that don't have standard version bytes yet.
11  Bitcoin / Press / [2014-04-06] Spirit Magazine - Business Idea: Bitcoin on: April 06, 2014, 04:25:38 AM
If your flying Southwest or AirTran you can read it on the plane or go here:
12  Bitcoin / Press / 2013-11-17 Bloomberg: US-Agencies-to-Say-Bitcoins-Offer-Legitimate-Benefits on: November 18, 2013, 04:09:30 AM

13  Bitcoin / Hardware / Hubs for Block Erupter USB AsicMiner on: July 15, 2013, 10:00:36 PM
I have a sample coming for a USB hub that will be great for the Block Erupter USB ASICMiners

If it checks out, I will be buying a bunch of them. (3-4 weeks out)


10 ports
USB 3.0/2.1/2.0
Led Indication    Red(Power)   Green(working)
Material of construction is aluminum alloy
VIA VL812 Chipset

Includes 5 amp power supply. Anker hubs are only 4 amps

Will be less expensive than Anker hubs.

Looking if there is any interest for this.

Reply if you would like to reserve one. I will contact you when they come in (Not binding)

14  Bitcoin / Hardware / Check out this new ASIC miner I found on ebay on: July 12, 2013, 06:46:31 PM

Seems legit.

15  Bitcoin / Hardware / Got my JALAPENO today mining at 5.9 Gh/s with some tweaks on: May 31, 2013, 11:31:44 PM
The Jalapeno case doesn't allow for a lot of good air flow.

When running out of the box I was getting 5.8 - 5.9 when it first started mining and then dropped to 5.6-5.7 Gh/s after it warmed up. Soto increase air flow I did the following:

1. Take apart case
2. Flip top over and put on bottom
3. Flip fan around so that it is blowing down
4. Run screws through fan and plastic spacers into top which is now on bottom
5. Runs cooler and faster now

Getting 5.9 - 6.0 Gh/s now
Running on Cgminer 3.1.1

Thanks to Sadpandatech for selling me the thing and for the great suggestions.

16  Bitcoin / Project Development / [ANN] Bitcoin ATM (Beta) on: April 08, 2013, 04:50:21 AM
Announcing Bitcoin ATM system

This project is in Beta, but it will allow you to build your own Bitcoin ATM machine.

Overview: The Bitvenders system allows anyone in the world to build and manage their own Bitcoin ATM.  The Bitvenders system consists of two parts; Kiosk software that is free to download and a website that manages the functions of the Bitcoin ATM/Vending machine kiosk.  The kiosk works by a user entering a destination Bitcoin address and then inserting cash into a bill validator.  A bitcoins are then sent to the address instantaneously at the current market value plus a fee set by the kiosk owner. Bitvenders will collect a small fee from the transaction (< 1% , Bitvenders fee is set to 0% during Beta).

To get started, here is a list of components needed to setup a basic system:

  • Bill acceptor compatible with MEI serial protocol (EBDS) such as  MEI cashflow AE2400 , AE2600 or AE2800. The MEI SC series validators should also work, but haven't been tested yet. (The SC series will probably need to be used for non US currency)
  • Serial cable for bill validator
  • A web cam
  • A windows 7 computer
  • RS232 to USB converter
  • Touch screen with at least 1024x768 resolution (optional)
  • Kiosk Software at
  • Bitvenders account at

Video Demonstration of my Bitcoin ATM demo unit will be here soon...

WARNING: This is an early release so that Kiosk owners can try out the system before Bitvenders is ready for large scale operation. Only deposit small amounts of Bitcoin into accounts for testing.

17  Economy / Trading Discussion / Building a Bitcoin ATM. Should I bother? Demo Video! on: November 17, 2012, 03:31:34 AM
I have been building a bitcoin automatic teller machine which consists of a computer, webcam/QRcode scanner, bill acceptor, touchscreen and receipt printer.  The idea of it is to allow anyone to purchase bitcoins with cash just by scanning their bitcoin address and depositing cash into the machine.  The machine then instantly sends bitcoins to the address at the current exchange rate plus some minus a fee of some sort.  Has anyone done this yet? Does anyone think that this is something people will use?

I will eventually post a video showing it in action once I fix a few more bugs in the user interface.  

EDIT: Here is a crude demo video of the prototype    
18  Economy / Computer hardware / [WTS-SOLD] 5970 x 2 on: June 19, 2012, 10:30:54 PM
Selling 2 5970s 1 Diamond and 1 reference card.

Works great.  Need to sell some hardware to pay bills.  Ship to US or CANADA.

Make offer!
19  Economy / Goods / HIS HD 5770 1GB (128bit) GDDR5 PCIe (DirectX 11/ Eyefinity) on: June 15, 2012, 02:02:28 AM
Auction over soon on bitmit for a used HIS HD 5770 1GB (128bit) GDDR5 PCIe (DirectX 11/ Eyefinity). Less than 8 btc currently!

20  Bitcoin / Development & Technical Discussion / Bitcoin 0.6.99 screwed up on: May 26, 2012, 12:13:54 AM
I wanted to compile my own bitcoind, so I cloned it from github and compiled.  Ran it for a few weeks and started to recieve warnings that my wallets transactions may be invalid.  So I downloaded 0.6.2 binary and tried to run it on the same database. I got a database error when I tried to start it.  Had to download the entire blockchain again. That sucks when your trying to run a small mining pool.  I guess I am a git noob, but what is the address to clone the latest stable version? 
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