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1421  Bitcoin / Bitcoin Discussion / Re: MARA Pool mined its first 'clean' block today on: May 09, 2021, 03:54:06 AM
That doesn't matter if they manage to get 51% of the hashrate though.
I doubt they will be able to obtain a proportion that high under their purview, but yeah never really know.

Who knows, but I wouldn't put it past them to try. If they refuse to mine a transaction which the government tells them not to, then why are they happy building on top of such transactions and giving them more confirmations?
51% attacks would definitely have far more repercussions than simple censorship. Reorganizing and opting out blocks that they don't like probably won't sit well with most people, more so than censorship within their blocks. If they're smart, they would either choose another pool or just sell their ASICs right away.

So clean block is more or less the controlled one and for example observed by the OFAC? And why would they do that and how would they do that in the first place. I mean when the pool is mining how do they even know that the transactions are done for the blacklisted addresses?
Yes, censorship and yes.
Also can't they just use the services like coin mixing to hid their stuff?
Yes. If there ever comes a day where the entire network is under regulatory control (if I may add, IMO highly implausible), you can't mix your coins if it doesn't get confirmed in the first place.
1422  Bitcoin / Bitcoin Technical Support / Re: When can transaction be dropped from mempool on: May 09, 2021, 03:39:46 AM
I think people would be surprised how many custom implementations of Bitcoin software are used by miners and even regular Bitcoiners who want to help maintain the blockchain without being bound to “defaults” set by some random team of individuals. Thinking about it, it’s actually pretty dumb to claim a “default” setting on the mempool based on one wallet, not to mention incorrect.
It isn't wrong to be talking about the reference implementations though. There isn't any reason for people to be messing with their default mempool size and thus it would be safe to assume that most people which runs the reference client (Bitcoin Core) do not change the various settings that doesn't directly affect them (minmempoolfee, minrelayfee, mempoolsize). Miners probably don't run the reference implementation but if a user creates a transaction after it gets dropped, it would probably have a higher fee and miners would definitely want that transaction to be relayed to them.

While the mempool is unique and specific to each node, your best and most accurate assumption would be based on the typical default behavior of the majority.
1423  Bitcoin / Bitcoin Discussion / Re: how many more years our bitcoins will be save from quantum supercomputer on: May 09, 2021, 03:33:16 AM
Then let them be stolen. I would rather they were stolen and dumped on the market because the owner did not look after them properly, then the devs/miners/community step in and said "Well, if you aren't going to look after your coins properly then you won't be allowed to use them." The first will dump the price, sure, but it doesn't affect the fundamentals of bitcoin, and the price will recover. The latter changes the very nature of bitcoin. You can no longer "be your own bank" if the community can decide that that is simply a privilege they can deny, rather than right of every bitcoin user.
Hmm, then I guess though we do have agreements on most issues, we'll be on the opposite sides regarding this. My take is that the unusual circumstances of this warrants the need to violate certain tenets of Bitcoin, for the betterment of the community at the very least.

The only option I can imagine being comfortable with at the moment is one where the coins are locked, but proof of ownership of the original keys allows the true owner to unlock and use them again. For reused addresses this could be possible by demonstrating knowledge of the seed phrase which generated the relevant private key(s). Since seed phrase to private key uses hash functions and not elliptic curve multiplication, it is not particularly vulnerable to quantum computers. This does not solve the problem for P2PK coins, though.
Would it be possible for it to be implemented in a trustless manner on the protocol level. Doing something like this requires the user to expose their seeds and subsequently the private keys to someone, it wouldn't work if it is to be implemented on the network.
1424  Bitcoin / Bitcoin Discussion / Re: The United States is increasing its bitcoin hashrate in the region. on: May 08, 2021, 04:30:42 PM
Do you know where 1/3 of the hashrate in the world is located? In a damn desert! Grin
Xinjiang has the worst climate possible in China is we count summer temperatures, but that doesn't matter when the power is so cheap you can afford to pay triple on cooling. Besides, industrial cooling is highly effective, when you pay 2cents per kWh you stop caring about what's outside.
Really? I saw estimates that they're 30% of the hashrate coming from China. XinJiang's climate isn't that terrible, it still has a seasonal weather and certain parts of it are still fairly cool.

Cooling probably isn't the main priority nor do they really care. Paying extra on cooling is mostly redundant, you get fairly marginal benefits from overclocking them anyways. Ambient temperature delta is not that substantial to warrant additional cooling, if you consider the cost of installing them.

Bitmain doesn't care who pays for the miners if it's from the US or EU or China.
There is no Chinese or American in this business, it's a company that is based in some country and nothing more, business is not always about politics. Bitmain is supplying Riot with 50k miners and Marathon with 100k, what matters is selling as fast as possible to the guys who can afford to pay more and grab the profit, hardcore nationalism is not good for business.
Are they exempted from the tariffs? The cost to ship the ASICs to the States would definitely be more substantial than having to sell it locally. If the profit margin makes sense, then there isn't any reason to not sell them.
1425  Bitcoin / Bitcoin Discussion / Re: how many more years our bitcoins will be save from quantum supercomputer on: May 08, 2021, 03:40:27 PM
I am deeply uncomfortable with the idea of the network agreeing to a fork which burns or otherwise locks coins which don't belong to us. I understand the situation with potentially 2 million coins being vulnerable to being stolen and dumped, which would undoubtedly have a major impact on the price, but I think the alternative is worse. It sets a terrible precedent that in the future your coins can be seized against your will. It threatens the very nature of bitcoin.
Indeed, its a moral dilemma but either of the solution will make sense.

However, if it reaches that point; it gets easy enough to attack ECDSA within a reasonable period of time and with a good cost/benefit ratio , your coins would be stolen anyways. Either you prevent people from stealing Bitcoins or you allow people to steal those Bitcoins and potentially ruin Bitcoin as a whole, eitherways the Bitcoins would probably be stolen/made inaccessible somewhere in the future. Is Bitcoin still really worth X, if 2 million coins (potentially more as we near that phase) can be siphoned from those addresses at will?  Moving to a quantum-resistant algorithm can be done years before it becomes feasible, thus giving those people a few years to recover those coins before finally switching to that algorithm completely. Great thing is: you can choose to support either of this forks in the future and choose which side you would side on.

IMO, it doesn't really reflect anything negative on Bitcoin. Locking those coins probably doesn't benefit anyone and the issue at hand is quite obvious, any decision made can be quite justifiable.
1426  Bitcoin / Bitcoin Technical Support / Re: When can transaction be dropped from mempool on: May 08, 2021, 03:30:02 PM
With what I have noticed, wallets do rebroadcast transactions, this happens when the wallet is synchronizing with the blockchain, that is why such wallets are needed to be totally turned off so it will not be able to sychronize with the blockchain for over long time.
Most wallets allows you to remove the transaction and thus avoiding any rebroadcast. Doing so will not prevent someone else from rebroadcasting that TX for you.
Another reason this can occur is what pooya87 said. There are thousands of nodes running full nodes, some nodes can receive a transaction today, while some other nodes can receive the transaction in 4 or 5 or more days after. This can make the transaction to remain stuck if many nodes still having the transaction not dropped.
Not really stuck per se. Just that any "conflicting" transactions will have poor propagation if it doesn't signal RBF and meet the RBF requirement. Even if there is a poor propagation, there is still a chance for miners to be able to see your transaction if the propagation just so happens that it reaches the miners. The nodes are just intermediaries which increases the chances of a good propagation.
1427  Bitcoin / Electrum / Re: Electrum privacy questions on: May 08, 2021, 12:48:59 PM
You can also use Tor and .onion servers with your Electrum wallet to improve your privacy, and I think electrum should think of adding some easy switch option for this just like Wasabi and Trezor Suite have.
If you want to have any privacy, Electrum is not the wallet to use. The nature of Electrum will leak privacy and Tor only obfuscates the IPs but will still result in the addresses still being linked to each other. The Tor feature would probably be better to circumvent any internet restrictions instead of privacy.

Speaking of privacy and Wasabi, can you CoinJoin transactions on electrum? As for tor, I've tried connecting to some nodes, but failed. I guess I'll create a different thread for that.
You need a coordinator, which is what Wasabi has.

If you want privacy or anything like it, don't use Electrum. There is nothing that preserves or attempts to preserve your privacy to any significant extent included in Electrum.
1428  Bitcoin / Bitcoin Technical Support / Re: When can transaction be dropped from mempool on: May 08, 2021, 12:02:54 PM
NOTE: unfortunately it formats the BTC values in scientific notation... ie. 1.0e-5 instead of 0.00001000 Undecided
No doubt that it would be equally easy to find something that displays in the actual decimals but my node returns the values as it is: http://163.172.57.208/getmempoolinfo.txt.

Feel free to refer to that if needed, it is running at default settings as well.

I also heard that the default is ~2 weeks but many times I have experience that it is not. This is an example. The user has waited more than 23 days for his tx to get confirmed.

@nc50lc
Is this because of:
Quote
Some wallets, clients and services have a built-in re-broadcast function to make sure that the transaction wont be dropped.
Anyone can rebroadcast the transaction as long as they have the raw transaction (which is something every node has once it is propagated). But yes, that is basically the reason why.
1429  Bitcoin / Bitcoin Technical Support / Re: When can transaction be dropped from mempool on: May 08, 2021, 06:31:04 AM
Your wallet is not the only one that can rebroadcast the transaction. Anyone with your raw transaction will be able to do so and that includes your recipient as well.

There is really no guarantee that your transaction will ever be drop due to the fact that anyone can rebroadcast your transaction at their will. That is why we normally use opt-in RBF to replace the transaction if it gets unconfirmed for far too long. Some wallets don't check the mempool to see if your transaction has reached its expiry, violated the min fee, etc. In those cases, the transaction can very well remain in your wallet as unconfirmed even when the majority of the network has dropped it.
1430  Other / Archival / Re: A secure device dedicated to using cryptocurrencies safe use on: May 07, 2021, 02:39:14 PM
You might want to consider using Tails for a far easier setup.

Some software that you might use would probably not be open source. If you're using it for a single purpose only, then its probably quite possible to only install things that are open source on it. It really doesn't mean much if you don't verify it and compile yourself; there were plenty of instances where supply chain attacks compromised well known programs and installed their own backdoor into it. Whenever possible, minimize the applications that you're using on the computer.

Eavesdropping on your network is possible, whether you're using WiFi or not. Fact is, most sites uses TLS which really just negates the risk. If you want to protect your funds, just get an airgapped wallet or a hardware wallet. Maintaining security of any device that is connected to the internet is a tedious task.
1431  Economy / Exchanges / Re: Can someone explain what happenend here? on: May 07, 2021, 02:10:44 PM
What was the exchange rate on the site when you used the service?

The exchange sent 0.00138782BTC to your address, are you expecting this amount? If you were expecting more, you have to ask the service yourself whether the exchange rate was right or if there were any undisclosed fees. There is nothing wrong with Electrum or does it have anything to do with Electrum. You have to know how much you exchanged your Euros for. Fees are indeed higher now, as compared to years ago.
1432  Bitcoin / Electrum / Re: The server returned an error when broadcasting the transaction. on: May 07, 2021, 10:44:23 AM
Guys.. OP probably meant to send the funds in BTC instead of mBTC, hence why the reply to my post.

Sending 59 satoshis to anyone is completely absurd, Bitcoin isn't worth millions of dollars. I'm sure this topic is solved and no further discussion would be required.
1433  Other / Beginners & Help / Re: Crypto is increasingly being used for criminal activities on: May 07, 2021, 09:27:15 AM
Good old-fashioned cash continues to be the funding of choice for criminals.The UN estimates that ~$1.6 trillion in cash is laundered each year meanwhile, criminal activity in cryptocurrency actually fell quite dramatically, from 2.1% in 2019 to less than half a percent in 2020.
Why did you contradict your own topic?

Nature of Bitcoin won't allow any third party to be accurately tracking illicit and normal transactions. These estimations are (probably) based on known and exposed activities.  I'd say Bitcoin has been integrated into loads of ransomware and used in place of the gift cards or WU that were mainly used for this purpose. Cryptocurrency are great for money laundering but fiat is far more untraceable.
1434  Bitcoin / Hardware wallets / Re: i lost my passphrase for my trezor wallet, how can i get it back ? on: May 06, 2021, 10:47:26 PM
The seed phrase is 24 words long.

If you've lost your seeds, you have to create a new wallet and transfer the funds to an address in the new wallet. You can't change the seed phrase without generating a completely new wallet anyways.
1435  Bitcoin / Bitcoin Discussion / Re: The United States is increasing its bitcoin hashrate in the region. on: May 06, 2021, 03:45:51 PM
It's not completely wrong, but it isn't completely accurate also because it is based on assumptions and samples.
I've mentioned the tendency and the source of any statistical bias in my previous replies.

Can you provide me a link to an article that explains why they are the main miners? While the biggest pools are located in China, it doesn't necessarily mean that the main miners are Chinese.
Check the links (CBECI) referenced in my prior replies. It doesn't take the data solely based on the pools but a sampling using the connections established to the pools, which accounts for 37% of the network hashrate. You can interpret it as the composition of the miners in those three pools, extrapolating to the rest of the Chinese pools would probably still bring it to an acceptable margin of error, note that some of the other pools also directly operates several farms within China, so those could possibly have even greater composition of Chinese miners.. Data is accurate for April only.

Anyways, unless someone is intentionally trolling, I doubt anyone in the right mind would try to use a VPN/Proxy to masquerade as a Chinese Bitcoin miner or to any significant capacity. Understand that it has to be an assumption but it is just so unlikely.
1436  Bitcoin / Bitcoin Discussion / Re: The United States is increasing its bitcoin hashrate in the region. on: May 06, 2021, 01:29:26 PM
Better read previous posts before asking questions like this.
China is NOT equal all Chinese mining pools, and that is NOT equal all miners in that pools located in China.
For example I know some people from Europe, that have asic miners running in EU but they use Binance pool, and they are also part of that 65% like many others.

No, the stats that the user is providing is not completely wrong. As in the graph represents the aggregate IP logs across the (few) pools. I mean you can't really get anything more accurate than this considering the top pools are all based in China. You can interpret the stats both ways, whether it is indicative of the actual situation or not.

IMO, its a 50-50; you're counting only Chinese pools but a significant proportion (I think 2/3) of them is Chinese anyways.

Yeah so the pools that are Chinese controls about 80%. Only if the rest of the network are not Chinese, then I presume it would be around 50% actually.
1437  Bitcoin / Bitcoin Discussion / Re: how many more years our bitcoins will be save from quantum supercomputer on: May 06, 2021, 12:58:51 PM
All the theories about quantum computers and Bitcoin are nothing but FUD...
Quantum computers are simply being used as a "scarecrow" by all the FUDsters and Bitcoin haters.
"Don't buy Bitcoin,because after X amount of years,a quantum computer will destroy the Bitcoin Core blockchain and your Bitcoins will be gone."This is the main narrative.
There are two things to be considered:
1.The Bitcoin Core blockchain is not static and can be/will be improved.
2.A potential successful attack will crash the Bitcoin price to unprecedented lows,which makes the attack unprofitable.
Two 2 factors make a possible quantum computer attack pointless.
By the way,I'm not an expert in this topic. Grin
If you're not an expert in this topic, then why do you assert that "QCs are nothing but FUD?"

1. You cannot protect outputs which requires an ECDSA signature to unlock. They are inherently vulnerable.

2. A successful attack will most likely not be detectable. Siphoning funds slowly from exposed addresses would be pretty much undetectable, given that people would go with the suspicion of a having malwares, etc and if the knowledge of a QC technology is concealed well enough, it could be quite a while before the community catches on.
1438  Bitcoin / Bitcoin Discussion / Re: The United States is increasing its bitcoin hashrate in the region. on: May 06, 2021, 12:28:25 PM
It is true that many miners join chinese pools because they have lower fees and other incentives, but nothing is stopping pools from US and other countries to have even lower fees in this open market.
Payout variance is something that you cannot solve without having miners in the first place. Miners are far more likely to favour larger pools due to their reliability as well, fees can matter less in some instances.
We can still assume that most actual mining devices are actually located in China and joining their own chinese pools, but I am not sure if it's possible to be more precise and see actual IP addresses of each miner inside specific pool.
CBECI has randomized data here: https://cbeci.org/mining_map.

** I didn't see the edit when I was typing. But given that the data consists of only pools based in China, it could very well be possible that there might be some discrepancies from the actual values due to the sampling method.
1439  Bitcoin / Bitcoin Discussion / Re: The United States is increasing its bitcoin hashrate in the region. on: May 06, 2021, 12:14:07 PM
Don't look at the data and judge it solely based on where the pools are based in. Most pools have servers in different locations and people from all over the world can connect to their pools, mainly from the lower fees or payout variance.

In the recent months, the proportion of China miners has indeed decreased in comparison to the rest of the world. US is certainly still not the most conducive place, isn't there still tariffs on ASICs from China? I'd think that labour laws are stricter there and probably would have to spend more on that as well. The decrease in proportion is most likely due to the decrease in the miners from China rather than an increase in miners from the US.
1440  Bitcoin / Bitcoin Discussion / Re: MARA Pool mined its first 'clean' block today on: May 06, 2021, 12:05:04 PM
It is a known limitation with Bitcoin, miners having the say in the kinds of transaction to include would lead to potential problems like this.

OFAC is a US entity which likely has no jurisdiction elsewhere so that isn't really a problem. I'm almost certain that the Chinese pools won't bow down to pressure from US or any other countries. If there comes a point where a good proportion of the pools implement such censorship, those kinds of transaction gets more expensive but miners can still mine them. If it gets included in the block, should the other pools re-org the chain and effectively execute a 51% attack against Bitcoin?

While something like this is dangerous, mining pools do not necessarily have to be regulated by any government. International policies won't be effective as well, if history indicates anything.
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