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January 18, 2019, 09:27:58 PM *
News: Latest Bitcoin Core release: 0.17.1 [Torrent]
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701  Other / Meta / Re: Should we look through the post history before awarding merit to newbies? on: September 19, 2018, 10:11:25 AM
Yes, since based on my experience on another section, some newbies who make good posts usually plagiarize from another post/external website.

But if Jr. Member have higher minimum merit (between 3-5) or signature for newbie can't be filled with url/website, that would save people's time.
702  Bitcoin / Bitcoin Discussion / Re: Bitcoin Core 0.16.3 Released on: September 19, 2018, 04:31:00 AM
As usual, thank your for the hard work Smiley

Can anyone explain in an Eli5 exactly what this means?
If a node running Bitcoin Core from versions 0.14.0 to 0.16.2, receives a block that contains a transaction that has a duplicate input, that node will crash.

If the node is crashed, then is it possible that the blockchain/chainstate corrupted? If so, would be suck for those who use older version and use HDD if someone decide to use the exploit.

Also, i wonder if this exploit could be used to make all nodes offline (which make other attack scenario possible) ?
703  Bitcoin / Development & Technical Discussion / Re: Are Blocks in blockchain are indexed ? on: September 19, 2018, 04:15:34 AM
There's no way any developer would think scan entire database just to get a data.

Then, by comparing the speed between (ex. not indexed Window Explorer) and Bitcoin's Blockchain, this question pops in to your mind?

I am a Performance DBA, I know even if the table size in a couple of GB and you have to do Full table scan to fetch the data ,required data cannot be fetched within the seconds . (Debarring parallel query operations).

Sometimes telling obvious things is safer/better choice Roll Eyes

you can read more in details on bitcoin wiki Bitcoin Core 0.11 (ch 2): Data Storage

That link perfectly satisfy my query.

Thanks  to you all. Slightly off topic question, I already gone through all the chapters of "Mastering Bitcoin" book and I do not remember if I have read anything about it.  Did I missed in reading or there are some other source/book from which I should start.

This should be obvious, but the link is outdated and UTXO database/chainstate and LevelDB used by Bitcoin Core has been changed few times.
AFAIK 0.15.1 change chainstate format and there are multiple levelDB optimization.

"Mastering Bitcoin" mostly discuss about things necessary in Bitcoin protocol and database isn't part of it (except block header/TX format) since each client have different way to store/index blockchain/UTXO. A bit off-topic, you might find source/book you want in list that i mentioned in past

Since you have intermediate blockchain knowledge, surely these lists shouldn't too difficult for you :

You also could check these cryptocurrency specific lists, but might be difficult for you (and me) :

The lists i mentioned aren't courses, but i'm sure you would get more knowledge/info with shorter time.
704  Other / Meta / Re: Use of the NEWS FEED to announce changes in the forum? on: September 18, 2018, 01:08:06 PM
That would be a great idea if members used the news feed. I suspect that most don't.

But we would have valid reason ask moderator to lock/move/delete/archive the thread which ask question that already listed on News Feed and thus Meta & Local section would be cleaner.

I think the only thing it has been used with (other than bitcoin core) is the electrum vulnerability.
I did ask a while ago if we could use that feed to announce the new versions of electrum (as I understand theymos also uses the software) but that was shunned because apparently it's just bitcoin core's updates that should go there...

it'd still be nice to see a bit more news in the news feed (we've been stuck on 0.16.2 for a while now).

If theymos think that, then i wonder if theymos could show 2 news (1 slot for bitcoin core/protocol update news, 1 slot for other client news/forum changes)
705  Bitcoin / Bitcoin Technical Support / Re: I want to use mobile data for Bitcoin related web pages on: September 18, 2018, 10:18:36 AM
It's impossible since your idea requiring software/extension access to access current page that Google Chrome for Android access while there's no extension or source code for google chrome. Even if it's exist, it's annoying to switch between mobile and wi-fi connection anytime when you access Bitcoin related website.
Using proxy/VPN/Tor is easier and far more convenient and you could have better privacy/security with proper configuration.

Besides, what basis that makes you think using mobile data is safer Huh
706  Other / Meta / Re: To All Upper Ranks on: September 18, 2018, 10:11:34 AM
Any member forum (ignoring their rank/status) don't have obligation to give merit to user's post/thread with specific rank. All that matter are members give merit to constructive topic without care about author's rank/status and don't give merit to shit-post or plagiarism-post.
Maybe if you actually make good post on section without lots of spammer where member who actually want to participate on forum/discussion going to, you have better chance to get merit.
707  Bitcoin / Alternative clients / Re: Seed and public key for eth/btc(Ledger) on: September 18, 2018, 10:00:34 AM
AFAIK, it's impossible since :
1. Bitcoin and Ethereum use different cryptographic hash function to generate public key and address.
2. List of address generated by XPUB which used by Bitcoin (and maybe Ethereum) can't be used to get seed or even XPUB.

gonna add more info if i remember something else
708  Bitcoin / Development & Technical Discussion / Re: Are Blocks in blockchain are indexed ? on: September 18, 2018, 04:04:30 AM
Bitcoin core (other client might do things differently) build and use UTXO database which stored on storage (not RAM) which makes transaction verification is faster. The UTXO database updated every time node receive transaction/block or create and broadcast transaction.
Besides, AFAIK most transaction can be verified in hundred millisecond.

There's no way any developer would think scan entire database just to get a data. Indexing, database balancing, sorting or/and separate database for linking obviously used in here.

If you're curious with UTXO size/count, you can check
709  Alternate cryptocurrencies / Mining (Altcoins) / Re: What to do with old asiks? on: September 17, 2018, 04:29:21 PM
Obviously sell those with low/cheap price is most safe/rational option. Waiting scrypt-based PoW altcoin's price to rise isn't good idea since other people would mine those altcoin which make difficulty rise quickly and all potential profit gone.
If you're into gambling/high risk choice and think scrypt-based PoW altcoin's price will rise, then you should start mining with those L3+ ASICs and sell when the price rise. I don't recommend this though.

Considering winter is right around the corner, I would place these units strategically in corners of each room. Turn them on when it gets chilly. You can probably set them on a timer too so that your house is nice and cosy when you get back from work.

Also, if you have a newborn at home, they make a very enjoyable background sound that will soothe him/her to sleep.

That depends on OP's geographic, some parts of Asia and Africa don't have 4 seasonss.

Besides AFAIK most ASIC create noise and most people don't like noise sound which would disturb people if they sleep nearby it.
710  Economy / Web Wallets / Re: My phonenumber is blocked due to circumstances: no access to my wallet on: September 17, 2018, 04:08:51 PM
Bitcoin has nothing to do with phone numbers.

Chances are you never owned any bitcoins in the first place, you never had a wallet, you maybe used a service that promises that it will hold bitcoins for you, in which case you need to contact them and complain about it.

In future keep in mind that if you really own bitcoins, you and only you will be in control of them and private keys associated with them.
If you need anybody's or anything's permission to access your private keys with your password at any point in time, you don't have any bitcoins.

This is a wrong board to discuss this since this has nothing to do with Bitcoin Core or Bitcoin in general.

This is completely true, but there's exception if OP using wallet (or any wallet which require 2FA, but also allow user to export their wallet file/private key/mnemonic seed which follow BIP).
If so, then OP still could recover his Bitcoin if he kept the backup and remember the password (if it's wallet file/encrypted private key).

Otherwise, you only can hope either your phone provider or centralized wallet services will help you to restore/give back access to the phone number/account.
711  Other / Meta / Re: Wall of fame / shame. Shit posts so bad that they are actually funny on: September 17, 2018, 08:04:27 AM
Theymos add new rules and we've got plenty of funny drama posts

712  Other / Meta / Re: Enhanced newbie restrictions & requirements on: September 17, 2018, 07:15:27 AM
As usual, theymos suddenly introduce new features/rules. Thanks Smiley
Hopefully Bitcoin Discussion/Altcoin Discussion will have real discussion again and actual good post/thread got few merits.

Gonna grab a popcorn to see upcoming arrived Meta drama Tongue

Admins!!! What you have done will lead to the fact that now massively will sell merit and who will not share it! Or you are interested in it themselves( to sell merit)? What you have done I believe is illegal! Think again, while the community has not found another forum!!!

I want to add! Cryptocurrency is made for decentralization and the forum should be the same, and with your new rules you make your forum centralized!!!

This forum has always been centralized, if you want decentralized forum, you should use Steemit or other decentralized forum.
713  Bitcoin / Electrum / Re: Electrum cannot connect to server on: September 17, 2018, 06:37:28 AM
I was wondering if it was something up with my computer.  It has been having troubling updating and installing programs/updating programs for a while.  Slow to start up as well, but I hardly have any programs open at startup.  I have done a few diagnostic scans, but I haven't found anything.

Looks like you just mentioned the source of the your problem, there's few things you might want to check or try :
1. Make sure your system/system files isn't missing or corrupted. Reinstall or repair the OS should fix the problem. If you're using windows, you simply can get bootable installer and choose repair/upgrade (upgrade automatically fix some OS problem).
2. Check your RAM and HDD/SSD. HDD with bad sector or used for many years tends to be very slow.
3. Connect to other electrum server (use list of Electrum server that i mentioned above)
4. Make sure your Electrum installer isn't corrupted or tampered by check it's checksum or verify it's signature
714  Bitcoin / Development & Technical Discussion / Re: Best way to make multisig wallets on: September 17, 2018, 03:51:27 AM
Have you looked into Tails? AFAIK it comes with Electrum out-of-the-box, so that might be a good starting point?

Aah, it's tails!

I was looking at riscos and thinking of how it won't be compatible with my computer, yes I'll definitely look into that one.

Just remember that Electrum included in Talis usually is out-dated and there might be problem if you use newer wallet/mnemonic format with older wallet.

Additionally, you could check which is Linux-based live OS. I never use it, but there are Electrum, plenty features and it's open source, even though i can't say how secure/convenience is it.
715  Alternate cryptocurrencies / Mining (Altcoins) / Re: it is a sad news,lyra2v2 ASIC is coming on: September 16, 2018, 05:05:38 PM
Remember what some crypto enthusiasm (such as StopAndDecrypt[1]) said? Things such as ASIC resistant is impossible, all people can do are making ASIC development slower and more expensive.
If there's an cryptocurrency with good profit, market cap or potential, people eventually will make an ASIC of that ASIC "resistant" PoW algorithm.

The only PoW algorithm that close of what people want is ProgPOW[2]. While it can't stop ASIC entirely, it's enough to make ASIC and FPGA not too efficient compared to CPU/GPU.


Then another forks comes to change algo in 6 months

additional door stoppers spotted Cheesy

Seeing like a Cryptonight algo scenario

Only if the developer/community care about decentralization or hate ASIC since they're CPU/GPU miners. But AFAIK most developer/community simply gave up Tongue

Another ASIC story, some coins ofcourse left on this algo.
ROI of this new devices going to the years after 2 -3 moth after release.
Today it shows 70$ per day

And it will drop significantly after the ASIC is shipped and difficulty adjustment happened. But, the manufacture could mine with the ASIC while it's profitable before ship it to customer Roll Eyes
716  Other / Beginners & Help / Re: Reading is the best remedy to get more knowledge! on: September 16, 2018, 02:44:54 PM
No, newbie should go to "Beginners & Help" first then read pinned thread. Meta mostly contains information about this forum, excluding few pinned thread.
717  Bitcoin / Electrum / Re: Electrum cannot connect to server on: September 16, 2018, 01:23:34 PM
Assuming there's no problem with your internet connection or internet configuration (try check if your firewall allow Electrum to use internet connection), then i would agree that your ISP/government doing is blockade.

You should use Tor/VPN or use list of known Electrum server (assuming it's not blocked yet) :
718  Other / Meta / Re: YouTube channel? on: September 15, 2018, 08:05:03 PM
Overall it's good idea, even though i strongly disagree showing anyone's face as Bitcointalk representative. IMO ilustration with human voice is far better.

- Bitcoin information

There's plenty video of Bitcoin information and i don't see much point of making another similar video unless there's specific viewer target (such as youngster or those with badtechnology literacy) or with up-to-date information.
IMO, it would be great if we could make video similar to Simply Explained - Savjee channel. Few members also mentioned that he's active on this forum.

- Summarized crypto news, but from a neutral perspective, without any pump-and-dump

This one might work, even though it's difficult to summarize/write from a neutral perspective.

- Summaries of recent high-quality posts
Maybe not this. Only the posts made by nullius, achow101 and gmaxwell will end up there.

High-quality posts doesn't mean technical thread/post, even though i only could think about it when high-quality post is mentioned. Maybe website such as would be better and user/member can post it under Bitcointalk's publication.
719  Other / Meta / Re: Do you think more merit sources need to be added? on: September 15, 2018, 07:16:38 PM
Of course, but the hardest part isn't finding Trustworthy member who applied to be a merit source, but finding thread/post with good quality among spam.
While there are few section such as Development & Technical Discussion and Bitcoin Technical Support without many spammer, not everyone have technical knowledge (or willing to learn).

But any members should actively use their sMerit, even if only give 1-2 sMerit rather than hoard it.
720  Bitcoin / Bitcoin Discussion / Re: "Vision of Satoshi" is'n's "Philosophy" on: September 15, 2018, 06:58:43 PM
Regardless of whether you call it a vision, philosophy, mantra or something else entirely, Bitcoin has now grown far beyond the influence of one person (assuming satoshi wasn't a group, that is).  People should stop basing their views about Bitcoin's current direction on what they believe satoshi would have wanted.  Not only because no one can know exactly what that was now, but also because you can't logically have a decentralised crypto if you're constantly making an appeal to authority when trying to move forward.

Additionally, it's not good to rely on Vision/Philosophy too much which created from some time ago since :
1. The world keep moving forward which makes current condition are different from past
2. Since current condition is different, then solution which worked on past might not work for today
3. Satoshi isn't perfect and some of his vision is outdated or Satoshi failed to predict the future. For example, one-cpu-one-vote sound good, but Satoshi failed to predict mining with GPU, FPGA and ASIC.

But regarding term, "Vision of Satoshi" or "Satoshi's Vision" sounds better, even though it's abused/misunderstood by many.
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