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1  Alternate cryptocurrencies / Mining (Altcoins) / Which pools have moved their hash power from BTC to BCH/alts? on: November 12, 2017, 01:12:28 PM
BTC hashpower seems to have gone down with block rate of around 30 mins
Based on whats visible, ANTPool, BTC.com and VIABTC have been mining BCH blocks heavily and not so many BTC.

Which pools are putting their hash power away from BTC?

2  Bitcoin / Bitcoin Discussion / Centralized hashing is the problem. on: November 12, 2017, 09:15:53 AM
Next hardfork of bitcoin should try to take care of these mining pools trying to dominate hashrate, if that is possible. A few mining pools should not be allowed to swing the hashrate so much.. This is like a coordinated centralized attack.

Pool users should decide where the hashrate goes, not the operators. This is a problem for all cryptos but more for BCH, whose hashrate adjusts more quickly.
3  Alternate cryptocurrencies / Altcoin Discussion / How much did you dump your BCC for? And when is the next hard fork coming? :D on: August 03, 2017, 10:29:42 PM
Next fork is when? And would be great if its well planned so we have better options to dump the coins.
4  Economy / Service Discussion / Viabtc down for past hour? [EDIT was more like 30 mins] on: August 03, 2017, 02:52:52 PM
I am getting:

502 Bad Gateway

nginx/1.10.3 (Ubuntu)

Anyone else able to login? I am guessing its the load triggered some circuit breaker. Site had been working fine till this (no sign of slowness).

EDIT: was actually around 30 mins. Seems to be back

5  Alternate cryptocurrencies / Altcoin Discussion / Why no BCC/BCH block after 478570 for last several hours? on: August 02, 2017, 01:50:58 PM
Why has the block time increased? I thought the reducing difficulty will make it stable.
6  Alternate cryptocurrencies / Mining (Altcoins) / Different hash rates on Windows 10 and Ubuntu 16.04 for GTX 1070 on: July 16, 2017, 06:44:26 AM
Testing a desktop with Asus mini GTX 1070 OC 8 GB on ETC.

I found that the same card gives 30 MHash/s @150 Watts in Windows 10 (with OC tweaks using Afterburner).
On Ubuntu 16.04 it gives 25 MHash/s @ 180 Watts (tried with NVidia Powermixer and tweaked coolbits etc but could not improve).
Sad.

Any ideas how to get similar rate and power usage on Ubuntu as in Windows?



7  Bitcoin / Development & Technical Discussion / Best way to parse the blockchain? on: June 18, 2017, 06:25:03 PM
What are the different tools out there that can parse the blockchain and let me maintain the utxo set?
My requirements:

actively maintained
open source
able to either work on top of bitcoind or bitcoinj

I have considered insight, Iquidus, toshi among others. Need help in selecting one.

Also, how can I get the "current" utxo snapshot without downloading the blockchain, say if I trust someone.
8  Bitcoin / Development & Technical Discussion / How can I broadcast a 'Replace-by-Fee' double-spend transaction? on: October 27, 2016, 09:24:18 AM
Say I have manually constructed a 'replace-by-fee' tx. How do I broadcast it? None of the push-tx sites seem to be accepting it. I am not running a full node, so pushing locally is not an option.

EDIT: I just realized I have to mark the original transaction as replacable, which was not done. So I guess I have to find some miner willing to take my double-spend TX.

Aren't there any mining services offering this? It will be a good business model.
9  Bitcoin / Development & Technical Discussion / Recent DDoS attack on DNS: A strong case for Namecoin-type protocols? on: October 22, 2016, 08:17:14 AM
Would namecoin or something decentralized have prevented this attack?
https://www.wired.com/2016/10/internet-outage-ddos-dns-dyn/
10  Bitcoin / Development & Technical Discussion / Rangeproof in Mimblewimble? on: October 05, 2016, 03:18:02 PM
First of all, I must say its a very interesting idea. Somehow I couldn't find efficient NIZK range proofs and the mimblewimble paper kind of assumes it as "obvious".

Maybe I missed something but please point me to some efficient implementation of range proofs.

BTW the whitepaper is here
https://download.wpsoftware.net/bitcoin/wizardry/mimblewimble.txt
11  Economy / Services / Small image design job [0.02 BTC Bounty] - EDIT - NO LONGER ACCEPTING on: August 06, 2016, 06:14:29 PM
I need to restore my old Casio watches by repairing their keypads. In order to do that, I need an image that I can print on a self-adhesive sticker.

Please look at this thread: http://forum.pocketcalculatorshow.com/topic/casio-dbc-600-keypad-replacement
The OP got someone to create a printable actual-size image for the keypad.

I need the same but for two different watches

1. CFX-40: keypad image http://home.earthlink.net/~kdstaller/images/face.jpg
2. DBC-610: keypad sample image http://www.watcharama.com/Images/casiodatacal.jpg

Essentially, I need something like this:
https://www.dropbox.com/s/5zb723po1nucq2h/dbc-600%20layer%20.pdf?dl=0
But for a different keypad design.

(credit for above image goes to this thread http://forum.pocketcalculatorshow.com/topic/casio-dbc-600-keypad-layer)


I will pay 0.01 BTC per logo.

Rules: [UPDATED rules 7, 8, 9 (on 8th Aug)]

1. Please post here before starting work.
2. Maximum one image for each design will be selected
3. Logo must be printable with exact size on an inkjet printer.
4. I will decide which image to choose and if I eventually choose any.
5. No escrow provided
6. Bounty will close on 31 Aug 2016.
7. Please wait for a reply from me in PM or this thread before starting, else you might not get paid.
8. Although, I will accept only 2 images as final, I will reward others who made an effort and sent me images. This is capped to 0.001 BTC (max 10 people)
9. Bounty may be closed and paid out earlier than 31st Aug if I decide that I've got what I wanted.

Contact me for exact sizes and details.
Feel free to share your portfolio of images.

Images can be sent by PM or posted on this thread.


EDIT: Submissions are closed. Locking this thread. See below for details.
12  Other / Off-topic / Gravitational Waves Detection Confirmed -- This is Huge!! on: February 11, 2016, 05:40:39 PM
Quote
Science
Feb 11 2016, 11:59 am ET
Gravitational Waves: Ripples in Space-Time Detected For First Time

by Maggie Fox

Excited scientists announced Thursday they have detected gravitational waves distortions in space-time from the collision of two black holes 1.3 billion years ago.

It's a discovery that was widely predicted but never actually proven, and it confirms many of Albert Einstein's theories about the universe.
Image: LIGO Optics Wave Detector
A Laser Interferometer Gravitational Wave Observatory (LIGO) optics technician inspecting one of LIGO's core optics (mirrors) by illuminating its surface with light at a glancing angle, prior to sealing up the chamber and pumping the vacuum system down. MIT/LIGO LABCaltech / AFP - Getty Images

"Ladies and gentlemen, we have detected gravitational waves," David Reitze, executive director of Caltech's twin Laser Interferometer Gravitational-Wave Observatory (LIGO) laboratory, said at a news conference in Washington, D.C.

"We did it!" Reitze said to an unusual standing ovation.


http://www.nbcnews.com/science/science-news/gravitational-waves-ripples-space-time-detected-first-time-n516566
13  Bitcoin / BitcoinJ / Old versions of bitcoinj seem to ignore multisig outputs [Urgent attention] on: September 18, 2015, 08:15:06 AM
As per this https://github.com/bitcoinj/bitcoinj/issues/1082

Quote
bitcoinj 0.11 ignores outputs having multisig address and (therefore) gives wrong indices #1082

This seems to be a serious problem if people use bitcoinj to monitor incoming transactions.

Can anyone confirm if this problem is indeed with bitcoinj code?
And does this imply that we need to urgently upgrade to latest bitcoinj?



14  Bitcoin / Development & Technical Discussion / Is it true that bitcoin signatures are now/will be required to be deterministic? on: August 12, 2015, 10:38:00 AM
Pardon my ignorance. Being around for so long I should be knowing this Tongue

I read somewhere that signatures are now (or soon will be) required to be deterministic. Is this true?
If true, will transactions signed by earlier versions of bitcoind/j be accepted?
15  Other / Beginners & Help / Transaction stuck on testnet for a while. Any other reason apart from fee? on: July 19, 2015, 10:37:28 PM
I have sent several transactions in the past on testnet with no fee and dust outputs. Until about a couple of weeks ago, they seemed to be going fine. Here is the one stuck:

https://www.blocktrail.com/tBTC/tx/9eaef2cb7725903535424028777fc75b758233281d52c0f445596db6f1f54998

What could be the reason? I guess its the fee but is it because everyone on testnet seems to have suddenly updated their client or setup new broadcasting rules after the stress test on mainnet.

How do I ensure that it is broadcast to a lot more nodes? (It seems to be not getting propagated enough despite me transmitting it to about 100 peers every 10 mins).
16  Bitcoin / Development & Technical Discussion / Does testnet get reset every now and then? on: July 02, 2015, 02:44:00 PM
I received some testnet coins a few weeks/months ago. Today when I tried to spend them, the tx cannot be found on the blockchain.

Is this because the testnet gets reset frequently? How frequently?
17  Economy / Service Discussion / What does (U) tag mean on blockchain.info ? on: June 29, 2015, 10:48:02 AM
I was browsing blockchain.info and noticed a tag (U) in one of the addresses. See pic.
What does that mean?



The same tx does not have this tag anymore.
https://blockchain.info/tx/18d95fc9378f82d1815d211ef4c72438ed20c9ed1da2ac5270faee187652fa2a
18  Bitcoin / Bitcoin Discussion / Blockchain as a public source of verifiable randomness? on: June 20, 2015, 04:24:07 AM
Lots of interesting ideas are proposed using a publicly available source of random bits that everyone has access to. People have proposed using sunspots, etc. (See for example: Cryptography from Sunspots)

The requirement is that everyone should have access to a constant source of random stream of bits
There should be no disagreement on the bits selected. For instance I can say select bits from "now" to next 10 secs and everyone should have the same set of bits. Furthermore, I should not be able to predict the bits
 
Can we use the blockchain as a source of random bits?
19  Bitcoin / Bitcoin Wallet for Android / Is this the forum for BCCAPI? on: June 18, 2015, 06:07:53 PM
I need some help with BCCAPI (bitcoin-clinent API) library. Its a java library.
Which is the correct forum to discuss it?
20  Other / Meta / API for bitcointalk.org? on: June 18, 2015, 01:37:48 PM
For people looking to make signature and avatar bots, and possibly lots of other cool tools and markets in the future, is there an API available for the forums?
Or do we have to scrape the HTML?
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