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September 22, 2018, 11:44:49 PM *
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101  Bitcoin / Development & Technical Discussion / Re: Mining reward "stealing" attack on: September 05, 2018, 03:55:14 AM
Aside from reason above member mentioned, it's impossible since :
1. Some Bitcoin client/nodes have feature called Checkpoint (basically stored hash of block at certain height) which is used to prevent someone re-write Bitcoin history by re-mine/re-doing PoW all block with low hashrate and manipulate each timestamp.
2. You still need to find way to make existing nodes to accept your block with far lower block height or older timestamp. Even SPV/light nodes will reject (or confused) your block since block header they store and your block header is different.

Additionally, even if you could overcome the problem somehow, people surely will notice and panic which lead to Bitcoin price crashing and you just wasting your time, money and energy Roll Eyes
102  Other / Meta / Re: 6 sendable merit left [regular merit boost feature needed] on: September 04, 2018, 07:30:21 PM
Unless regular sMerit refill is very low (1-3 sMerit/month, depends on rank with Full Member/higher as minimum requirement), your idea would be abused easily and there's almost no point of merit source.
103  Bitcoin / Development & Technical Discussion / Re: Developer Interview Questions on: September 04, 2018, 04:41:12 PM
I've no idea about how to recruit developer, but there are few obvious things that you should think/consider :
1. Not all of the question is related to Bitcoin such as questions on Chapter 9
2. There are few answer which is asking for opinion (such as Ch. 10 Q. 1 and Ch. 2 Q. 2), unless you specifically want to know about developer's view
3. Just like member above me, test them by solve a problem, find a bug or make efficient short script should be better/more effective

But if you specifically want to list of question or need other bitcoin's book/reference, my post in past might help

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.
104  Other / Meta / Re: Have we left "Bitcoin Discussion" board for spammers, forever?? on: September 04, 2018, 02:48:10 PM
Frankly, i don't see much hope on "Bitcoin Discussion" board unless theymos decide to disable signature on that board. In a page, i only can find 1-2 thread with real discussion.

Unlike board such as Development & Technical Discussion or Bitcoin Technical Support, there's too much spam and even report won't help too much.
105  Other / Serious discussion / Re: Cryptography could be illegal soon on: September 04, 2018, 02:41:59 PM
Ridiculous , they have no idea that cryptography is around everyone who use digital device/surfing on internet. From HTTPS, SSL, PGP, password hashing and many more that i even don't realize.
106  Bitcoin / Bitcoin Discussion / Re: Quantum computer could kill bitcoin on: September 04, 2018, 03:58:23 AM
This has been discussed in this forum many times and we know Quantum computer won't kill Bitcoin because :
1. ECDSA which used by Bitcoin is partially quantum resistance because Public Key needed to find out Private Key and Public Key only revealed when input of an address is used. So, one-time address usage partially solve the problem.
2. Bitcoin continuously improved through both soft-fork and hard-fork, so i'm sure developer/contributor will propose another Cryptographic which is quantum resistant.
There are few existing alternative, but mostly have huge trade-off on signature size and verification time.
107  Alternate cryptocurrencies / Altcoin Discussion / Re: Ethereum Devs can't seem to come to common ground about the upcoming Hardfork on: September 03, 2018, 04:56:51 PM
That's the risk of hard-fork, you need majority of agreement from miners, developer and community. But IMO i'm sure Ethereum will overcome this problem since there's influental people/group which would make consensus went smooth (or rather sign of take-over attempt/run their own agenda).
But people should've seen this coming since the plans to move from PoW to their own PoS (Casper) has been around for few years.

Besides, this could be pump ETH price if played right since people often attack PoW with "Wasting electricity" and "Vulnerable to 51% attack" Roll Eyes
108  Bitcoin / Bitcoin Discussion / Re: Hodlers are unscrupulous parasites. Here's why on: September 03, 2018, 04:30:01 PM
I agree that people that only HODL, never use/spend their Bitcoin at all and don't care about bitcoin usage/goal/technology barely contribute anything. But i wouldn't call them parasite since those who troll or share FUD are far worse than them.
Besides, just by investing their money on Bitcoin, there's small hope on them since at least they believe Bitcoin will success whether based on it's price or usage.

Also, there are many ways to contribute on Bitcoin besides spend Bitcoin such as helping newcomers, promote Bitcoin to those you know well, remove negative Bitcoin stigma among citizen, become Bitcoin developer or run full-nodes.
109  Bitcoin / Development & Technical Discussion / Re: Block Size Scalability Issues on: September 03, 2018, 10:38:06 AM
Good that I found this thread. I have been asking this question on r/bitcoin with no real answer. How is that LN will not cause centralization.

As I understand(Please correct if I am wrong) inorder for me to send BTC from A to B, I need to open the channel. So as a user I would have to do the same thing again If I have to send BTC from A to C (Unless B already has an open channel with C).

I think in long run we will see centralized points which have multiple open channel that users would connect to.

I know people dont like it but BCH atleast has a solution or even variable/flexible blocksize would solve in much better case.

You won't get able any answer if you show pessimism/negative views towards Bitcoin on r/bitcoin. You better ask this forum or if you've question which show pessimism/negative views.

It's hard to avoid centralized centered LN nodes since merchants or nodes with high liquidity/balance naturally would have high connected channel since people would open new channel (merchant) if there aren't any available path/route and there's fewer available path/route (merchants & nodes with high liquidity/balance) if you intend to use LN for bigger payment.

This thread Basics of the Lightning Network - explanation and wallets should give you more information.

I know people dont like it but BCH atleast has a solution or even variable/flexible blocksize would solve in much better case.

It's not really a solution. They postpone the problem.
Increasing a variable (blocksize) can never be a scaling solution.

A lot of new problems appear with a bigger blocksize which shouldn't be ignored.

For them it's not problem/doesn't matter since they think only mining full-nodes matter and miner should/must buy expensive hardware since they earn profit from mining.
110  Bitcoin / Development & Technical Discussion / Re: just for you to know on: September 03, 2018, 09:43:08 AM
Please be specific and IMO you put this on wrong section, unless you're gonna talk about your idea.
111  Bitcoin / Bitcoin Technical Support / Re: my transaction fee is too low . what should i do now? on: September 03, 2018, 09:32:57 AM
Since the transaction already confirmed, there's few things you want to consider next time :
1. Make sure you set fee which is suitable for your needs (1 sat/byte for non-important TX and higher for important TX). Website such as and should be good, however tends to over-estimate fees for next-block/fast confirmation.
2. If you still unsure/confused, you should use wallet which support RBF (Replace-by-fee) which make and broadcast your transaction, but with higher fees.
3. If you accidentally sent TX with low-fee again and your wallet don't support RBF, you could try contact the receiver to spend the bitcoin/input to make your TX could confirmed faster.

But generally you don't need to worry about set low fees, unless time/speed is important in your case Smiley
112  Other / Serious discussion / Re: Does any of you spend bitcoin in physical shops? on: September 03, 2018, 09:23:24 AM
Never, because bitcoin adoption in my country was very low and now government forbid using Bitcoin/any cryptocurrency as payment method/currency Sad

I only spend my Bitcoin for digital goods/gift card at virtual/online shops occasionally and mostly i just HODL
113  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Bitcoin Cash - Pro on-chain scaling - Cheaper fees on: September 02, 2018, 07:12:30 PM
Now that BCH stress test is over, it would great if there's info/log such as bandwidth, block propagation time, TX/block verification time and memory usage from multiple source/nodes which have internet/device condition Roll Eyes
114  Bitcoin / Bitcoin Discussion / Re: Does Bitmain have a pump and dump team? on: September 02, 2018, 06:51:00 PM
Based on their pool, ASIC capitalization and their own mining farm which mined lots of cryptocurrency on big amount, i'm sure they have their own pump/dump team.

Their shady/controversial ideals/action prove also prove that they need to have such team to run their own agenda.
115  Bitcoin / Development & Technical Discussion / Re: Total Number of full nodes operating. Less than 10k. on: September 02, 2018, 06:42:07 PM
Only those who've small bitcoin technical knowledge and care about decentralization or privacy/anonymity when using SPV wallet who would run full nodes.
Even though you could use low-end/barebone devices to run Bitcoin full nodes since Bitcoiner/Bitcoin developer care about anyone can run full nodes with low cost, majority don't want to do it because they think they don't earn anything and only wasting their money by doing it.

The only way to increase the number are by encourage merchants with high volume to run full nodes and make people realize/remember why decentralization (specifically run full nodes in this case) matters.

Unfortunately, I had to give up, because my old 2010 notebook could not handle 200Gb of space.
I would have to delete some personal stuff, and as it was just and experiment, it was easier to just give up the idea.

HDD is cheap today and you can run both OS and full nodes with a HDD, so i suggest you to try run full nodes if you want buy another HDD.
116  Bitcoin / Bitcoin Discussion / Re: Stop using words "Bitcoin", "Crypto", "Blockchain" interchangeably. on: September 02, 2018, 06:30:06 PM
Mostly i agree

But this happens because people actually don't care about these technology or never do proper research. Blockchain is used as buzzword by various tech companies/ICO while another cryptocurrency compared themselves with Bitcoin and claim they're better without telling the trade-off.

It is lack of a systematic education that has caused the this adoption of wrong use of these words interchangeably. As more people come to know these in the near future, this mistake will be avoided.

though i do not like people using bitcoin the protocol and bitcoin the currency in the same sentance. id prefer people to say btc in reference to the currency. (or near future, 'bits' and 'sats')

the other funny conversational buzzword pet hate is 'wallet'.
a crypto wallet does not hold funds. it holds the keys to sign transactions to move the funds.
we should use a analogy word like a 'keyring'
or if the conversation is about the function of making a transaction.. an analogy of a electronic cheque book

but thats just going down the rabbit hole of the misconception that bitcoin should a 'coin' but be bitcheques and mining should be the cheque clearing house.

Bitcoin/cryptocurrency analogy was broken from the beginning and partly because early adopter/developer have no idea/experience UI/UX.
117  Alternate cryptocurrencies / Altcoin Discussion / Re: Bitcoin Cash BCH has accounted for 64.7% of ALL crypto transactions on: September 02, 2018, 06:03:32 PM
It doesn't matter unless if BCH can keep majority of cryptocurrency transaction count for some time, besides if you look at other charts, we can see that :
1. Bitcoin and Dogecoin have far higher transaction value than BCH
2. Bitcoin, Ethereum and Dogecoin have higher active address than BCH which means those coins might have more active users (users =/= transaction count)

Edit : I just remember it's BCH stress days where the community make lots of transaction to prove the strength of their cryptocurrency, so now we know that most of the transaction is part of on-going testing Roll Eyes

More info :
118  Other / Meta / Re: Wall of fame / shame. Shit posts so bad that they are actually funny on: September 02, 2018, 05:16:39 AM
I just found out why Bitcoin's block time is 10 minutes Cheesy

10 minutes came up with Satoshi. It took him 10 minutes to shoot. Here and the milk will be ten minutes. It can also be one or two minutes, or even better 60 minutes. Satoshi the founder of the block system came up with 10 minutes and that's it. This became the rule.
119  Other / Serious discussion / Re: Can this feature solve most of the forum problems? on: September 01, 2018, 08:35:49 PM
There are complaints by some about the quality of the forum. They think people with poor grammar shouldn't be here. others think nothing is being done about low quality posters and spammers. I do not agree with those who wants people banned or punished for poor grammar.  I live in a society where people with poor grammar skills (whether in English or in their native languages) are usually the creative/science oriented ones (I don't know about other societies). Kicking them out wl be very unfair. There are lots of this people on Facebook, Twitter and other public platforms but you will hardly notice them because of how the platforms are structured.

AFAIK most member still welcome those with poor grammar as long as it's easy to understand, even though they recommend them to improve their english or stay on local board instead.
Besides, if they plan to join English forum/community, they should realized they need to have acceptable English grammar.

Here is what I think may be wrong.

 The forum is too conjested. We do not have much choice on what we see on here. Sometimes It feels like Posts/Contents are forced on us... In real World, you can easily avoid people with certain behaviors but you cannot do this on the forum. It is as if we are crammed together in a small space. This can be very traumatizing to the "sensitive ones".

Isn't it how forum works? Showing thread/topic by it's most recent replies date. But there are forum section and Ignore features.

Why don't we try the "Follow" Feature?

With the "Follow" feature, only posts from people you follow will be more visible to you. The feature should be optional. If you want more posts from people you follow to be visible you can simply adjust it on your settings. If you want post from random people to be less visible you can adjust it. You can always  adjust the settings to increase or reduce the visibility of certain posts. 
I would like followers to be anonymized If this idea is considered I don't really need to know who my followers are.  I think this will encourage us to follow lots of people for more quality posts.

Good idea, even though it's not really fit with forum, but social media/blog instead.
120  Alternate cryptocurrencies / Altcoin Discussion / Re: Zcash is making progress and it is undervalued on: September 01, 2018, 08:23:20 PM
Zcash stuck on awkward position.

While their zk-SNARKS and upcoming zk-STARKS are interesting technology, their decision to make such features optional makes Zcash only partially private and not fungible unlike it's competitor (Monero).
Bitcoin also have better scalability (could achieve higher TPS while maintain decentralization) unlike Zcash shielded transaction which require long creation/verification time.

Besides AFAIK most wallet/exchange don't support shielded transaction/address which makes Zcash main features seems useless. So, IMO Zcash isn't undervalued unless they use zk-STARKS and make it mandatory.
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