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41  Alternate cryptocurrencies / Mining (Altcoins) / Mining with oculus quest ? on: January 10, 2022, 03:10:58 PM
Anyone investigated how performant would oculus quest 2 be at mining crypto ? It has a relatively good gpu and is supposed to be relatively optimised for low power consumption.

I wonder if there are already mining software that can work for oculus quest ? Or what kind of hash algorithm would be more optimal for it ?

Would be cool for a metaverse oriented blockchain no ?
42  Other / Off-topic / Re: web3 on: January 10, 2022, 01:06:02 PM
I've been working on a system like this for while, before the buzzword web3 was created, but it's a complex question, but essentially regarding the software architecture you can always approach this to the MVC model ( model view controller), some mechanism to route network request to a function ( controller ) , some model for data ( Model) , and a way to generate the UI / interface / content ( views) .

All of this with the additional feature that identifier on the network must be decentralized using asymetric cryptography instead of centralized login/session, and some way to have also permission that can be stored on the blockchain and checked by any node. Then also a way to store file like images in a decentralized p2p way.

From there normally you already have a good fundation for a decentralised web.
43  Other / Politics & Society / Re: Have you been infected with Covid-19? on: January 10, 2022, 12:46:42 PM
I just saw this study which seem to be more and more confirmed that say the covid infection can have long lasting damage, mostly on cognitive function and tiredness etc

https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(21)00324-2/fulltext

So don't understimate it because the symptoms are low and doesn't look dangerous, i would strongly advise to take any measure you can to heal as fast as you can Smiley
44  Bitcoin / Bitcoin Discussion / Re: Bitcoin is a commodity market ? on: January 10, 2022, 12:43:24 PM
The idea of supply and demand ok, but to me it seems more and more to be some kind of sophism more than anything. Look like some form of sollipism like i make the reality how i want it to be. But in reality you will rarely find some instance when this logic apply in real life. There is always a reasonable price to expect for something at a particular time. Then the price can vary following different factors etc but it's the thing i really fail to see with bitcoin. I mean whyt bitcoin worth 100x more now than 5 years ago ?

https://saylordotorg.github.io/text_microeconomics-theory-through-applications/s13-03-asset-markets-and-asset-prices.html

Quote
Imagine you passed a coffee shop and saw the sign shown in Figure 9.4 "Arbitrage at a Coffee Shop". This would make an economist salivate, not because of the prospect of good coffee but because it presents an opportunity for arbitrage. Facing an offer like this, you could immediately go and buy a pound of coffee beans for $10. Then you could turn around and sell the coffee at $12 per pound. You would have made $2 easy profit. Forget about drinking the coffee: just buy and sell, buy and sell, pound after pound—and become a billionaire. This is an example of arbitrage.

Sadly, you will never see a coffee shop making you an offer like this. We are confident of this because any coffee shop that made such an offer would very quickly go out of business. After all, if you can make a profit by buying at a low price and selling at a high price, then whoever is on the other side of these transactions is making a loss.

This summarize the problem as i see it Smiley

I mean ok you take real-estate for example where this kind of logic that the price can flucuate much depending on the demand. But then if the price of a certain real estate is much higher than another you can be sure the person paying significantly higher amount for this particular place is having a good reason to do so. Maybe it's close to a good school for their kid, maybe they like the neighrborhood. In any case there is always a good reason for someone to buy something at a higher price.

Stocks as share of a company are a different story, because history has proven the human mind is capable of incredible thing, and when you buy a share, you buy some share of future revenue of a work, most likely on royalities on the developement of sometime new that will pay off dividends , and history has shown many time how some brilllant mind can create things entierely new.

But bitcoin is not a stock, holding a coin on exchange is not going to pay any salary, and in anycase the main creator isn't being paid from it. The person who make a profit is the one selling on the exchange, the exchange who takes some operational fees and period.

When i see the original discussion, they were more concerned about bitcoin taking off, and of course at first it would be under evaluated, can see this as initial launch discount price, and to my knowledge this practice has never lead to any kind of market collapse, not to break any hearth, but i think we are way beyond a phase of initial launch discount.

Can always say ok but you can buy a fraction of it, but as anything in bitcoin it's much of a relativist game, so if you have only dust coins they will be hard to move because of fees and network congestion, so i thinks it's partially false to say some dust bitcoin has same value than more of it due to fees and network constraint.

Even the idea of it being an asset or store of value seems pretty moot, or contradictory with the idea that it's impossible to determine it's right price, and that it's highly flucuating from unknown and unpredictble factor, that seems to be contradictory with it as being a good store of value. Then ok with current state of global economy, it's not unreasonable to expect a massive crash sooner or latter, and there is clearly a high demand for some kind of hedge, or some asset that will resistant inflation, but at any rate i don't think the problem is mostly the one of monney printing, there are much deeper problem within the productive economy than only monney printing, and in any case regarding this fact that everyone say there is no way to really reliably determine bitcoin value doesn't make it a very good store of value. Other than for billionere who can set the price as they want by hoarding a massive stock of it.

So ok can take the argument of it being usefull for poor migrant to send monney home, but let me ask this question, how many of you has already invested 1$ in cash transfer system for that poor migrant can some monney home ? How valuable do you really think this is ?

Same for salvador, how many of you would have invested even 1$ into salvador economy, and even if they hire the best financial counselling to bootstrap new currency for their economy, how many would have bought even 1$ of it thinking it's going to make you rich ?

The idea that it's not used in the industry like other metals ok, that's a good point, but then also it's a digital technology, so it's normal it's not being used in the manufacture industry, maybe it can be compared to a databse into the digital economy.

Domain name same, in themselve they don't worth much, they have value because they are used by another buisness who will use the name as part of a marketting strategy, and they will make monney with their buisness, the domain name is just a part of it and its value depend completely on the success of the buisness behind it, not much in domain registration itself.

I mean that's just to throw some reflection and market parallel to find what kind of dynamic to expect. And it seems to me at this point the only way to really expect a huge rise from it is only by practicing some form of shady things like market conerning or pyramid scheme, which never really last very long in a free market where competition lead price toward a minimum for the demand. If the demand is only fueled by the perspective of resell profit while not adding any value to it by just holding it on an exchange , it cannot end well.


see hal finney on it Smiley

https://bitcointalk.org/index.php?topic=1388.msg37762#msg37762

The danger is if people are buying bitcoins in the expectation that the price will go up, and the resulting increased demand is what is driving the price up. That is the definition of a BUBBLE, and as we all know, bubbles burst.

45  Other / Off-topic / Re: Is bitcoin dying? on: January 10, 2022, 01:23:08 AM
https://youtu.be/z36EKujnZEk

We will survive Smiley
46  Alternate cryptocurrencies / Altcoin Discussion / Re: Reasons that Metaverse still has huge potential , but not at $sand $gala on: January 09, 2022, 11:27:01 PM
Im currently working on a project like this Smiley

https://bitcointalk.org/index.php?topic=5203331.msg58917761#msg58917761

It use the unity engine to support a maximum of different hardware and also some Web client. Its still heavily work in progress though Smiley

Im also big fan of vr, the controllers with 6 degree of freedom clearly improve the experience of interacting in a 3d environnement, especially compared to let say an android Phone who hasnt even any buttons at all. Especially if it has good physics etc connecting the 3d world with physical motion throught touch controller is really a whole different exeprience than using a single 2 axis mouse or touch screen on smart Phone.

The headset could be less usefull, but if you want two hands + look direction vr equipement is a must Smiley

But i still try to work unity input system at its maximum to support for all kind of input control android with screen touch / computer mouse + keyboard and vr headset, plus some web interface.

47  Bitcoin / Bitcoin Discussion / Re: Btc is boring on: January 09, 2022, 10:47:41 PM
Maybe it miss some strip tease and a few fireworks.  Kiss
48  Bitcoin / Development & Technical Discussion / Re: Proof of Useful Work? on: January 09, 2022, 08:55:29 PM
I thought about a system based on solving neural network i think all these sort of solution will have the same kind of issue.

With a neural network you could have this principale of pow with a learning set and shorter testing set the goal of solving the problem would be finding a network configuration that have lower error ratio than the previous on the testing set. Then the one who found the solution gain the reward. You could probably even make in sort that an identifer associated with a public key is "laced" into the computation in sort that you cant "steal" the work.

Seem the algorithm in the paper would use zero knowledge proof for this.

But the first problem is there will not neccesarily be a match between the demand for a particular problem solving and the amount of computation required to match a constant block time with a given amount of computational power.

In that case you have a reward for solving a particular problem and thats the economy of it.

If it takes two month to find the useful solution, there will not be any reward emitted for 2 month. But in this context of problem solving its fine, the economic value of the network is based on the amount of problem it can solve, so if there is a reward if 1000$ to solve this particular problem, and it take 2 month with the available computing power, then after the two month the network has increased its value of 1000$.

But its a completely different economy than emitting a currency in a p2p network. It an economy of decentralised cloud computing.

Beside this the only kind of work that can really be fit optimally for the purpose of emitting a coin is something approaching a random computation because it can evenly dustribute reward among all participant based on pure computing power.

It seems the paper address the issue of bounded time computation but to me it seems its more in that the ratio of verifier vs solver is always going to be low, more than to garantee a maximum time boundary for solving the problem ( doesnt seem very clear to me ).

But in the economy of cloud computing for solving problem its not really the same constraint.

To me it seem a bit pointless to try to mix the two because its very unlikely you will always have a perfect match between the demand for computation in problem solving and the problematic for a distributed cash system.

Energy expanditure is universal enough to be a good economic marker, computational problem solving much less.
49  Local / Discussions générales et utilisation du Bitcoin / Re: FULL NODE on: January 09, 2022, 05:55:16 PM
Si personne n'en mets il n'y a plus de blockchain. Ca reste un réseau p2p à la base il faut arrêter de tout voir uniquement en terme de gain court terme.
50  Economy / Trading Discussion / Re: Stop or continue trading on: January 09, 2022, 01:27:45 PM
As many have said the OP sound like a gambler punchline x)

There is no neccesity in trading, if you feel you cant stop and always need to be trading you should investigate your motivations Smiley

There are not always good opportunities, if you are not feeling really confident in an investement with all the informations you can get with a high probability of success then just wait. Be like the cat keeping alert and patiently waiting for the good catch Wink

Play to win, not just to play or you have high chances of ending up in this same situation again !
51  Other / Beginners & Help / Re: Definition of full node on: January 09, 2022, 12:00:30 PM
Otherwise they can simply scan their UTXO database and only show you what "coins" you currently have and can spend instead of showing you what "coins" you may have had and already have spent.

Good to know Smiley

They should make this option if it doesnt prevent to send and recieve coins safely from the address !
52  Bitcoin / Bitcoin Discussion / Bitcoin is a commodity market ? on: January 09, 2022, 01:14:21 AM
Lately i've been going back throught the old satoshi posts and there are at least two i found really interesting.

First this one

https://bitcointalk.org/index.php?topic=845.msg11403#msg11403

Bitcoins have no dividend or potential future dividend, therefore not like a stock.

More like a collectible or commodity.

And the other is this one

https://bitcointalk.org/index.php?topic=242.msg2078#msg2078

What the OP described is called "cornering the market".  When someone tries to buy all the world's supply of a scarce asset, the more they buy the higher the price goes.  At some point, it gets too expensive for them to buy any more.  It's great for the people who owned it beforehand because they get to sell it to the corner at crazy high prices.  As the price keeps going up and up, some people keep holding out for yet higher prices and refuse to sell.

The Hunt brothers famously bankrupted themselves trying to corner the silver market in 1979:
"Brothers Nelson Bunker Hunt and Herbert Hunt attempted to corner the world silver markets in the late 1970s and early 1980s, at one stage holding the rights to more than half of the world's deliverable silver.[1] During Hunt's accumulation of the precious metal silver prices rose from $11 an ounce in September 1979 to nearly $50 an ounce in January 1980.[2] Silver prices ultimately collapsed to below $11 an ounce two months later,[2] much of the fall on a single day now known as Silver Thursday, due to changes made to exchange rules regarding the purchase of commodities on margin.[3]"

http://en.wikipedia.org/wiki/Cornering_the_market


The main difference i see between bitcoin and a regular commodity is that a regular commodity's price is aligned around production cost, whereas bitcoin is the other way around which is the production cost gravitate around the demand's price.

So thats the eternal question around bitcoin is what is supposed to be the "right" price for it ?

My reasoning is that instead of asking this question peraphs the good question is how to know if it is overpriced ?

And the answer would be another question, how do you inflate artificially a commodity market ? By people with too much monney hoarding it to expect the price to rise and making more profit out of it than just exchanging it as utility as a regular use.

With this reasoning people with lots of monney hoarding expecting to make a profit would end as the Hunt brothers.

People using it as its supposed to be as a commodity or currency would not loose too much as not having too much in stock at any point.

Then ok there are always external economic factor that lead to people being more in saving or spending moods, so there is always some amount that is going to be organically saved. But then saving like keeping monney under the matress is a different attitude than hoarding for profit like "investing" as if it is a stock or a productive asset with some level of risk.

Is this reasoning correct ?

After all bitcoin was designed as digital cash with the coins circulating from address to address which is also part of the security model as i understand it because it makes it even more pointless to search for hash collision on a public address as the coins are always moving and are not supposed to sit on an address for long period but move between single use address which also increase anonymity.

If this is correct it mean some kind of "silver thursday" at some point when hoarders make the price so high nobody really want to buy it anymore and it ends up loosing all value on the market.

Anyway bitcoin as a currency can function at any market price as long as it not null because it still needs to be mined so the price cant go to zero but it can function at 1$ if thats the global economic value as a commodity.
53  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 11:42:14 PM

its good that you are a full node and want to help the backbone of the decentralised network by following the original principles. i hope you enjoy bitcoin and not end up getting swayed over to other networks for their commercial gain

I dont really see what other network i would use ethereum is clusterfuck squared, then there is what dash ( centralized clusterfuck ) , maybe caradanno but staking is another kind of clusterfuck .. if you cant run a full p2p node im not interested Smiley most the other thing you need to somehow pay to run full validating node or some other catch.
54  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 09:02:38 PM
But then why does it need to redownload everything to rescan an address ?
Full nodes that need to rescan the entire chain to check the balance of a new address don't keep the entire UTXO set. Remember that you should keep only your own UTXOs if you're using Bitcoin for personal use. You need all the UTXOs only when you want to analyze the chain or use commands such as getrawtransaction.

I suspect that if you set txindex=1, you won't have to rescan and wait for so long, whether you're pruning or not.

But then if you dont have all the utxo you cant validate the transactions in New blocks either ? ( unless they are related to address in your wallet or spend utxo from recent block ).
55  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 08:04:59 PM
You weren't wrong. It isn't fixed the data it stores. The chainstate gets bigger during IBD.

Seem you are right and the size limit is for blocks, and there is additional space for the utxo.

But then why does it need to redownload everything to rescan an address ?
56  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 06:58:51 PM


he didnt mention which software he had and i didnt ask. also if you do have all UTXO you dont need to re-sync to find balance.. its there in the full UTXO set.. (unless the UTXO set is not there.).

Thats what i wonder as well

https://bitcoin.stackexchange.com/questions/99681/how-can-i-import-a-private-key-into-a-pruned-node

Quote
Generally, the wallet shipped with Bitcoin Core only keeps copies of any transactions that directly involve the wallet. When you import a key, your node scans the entire blockchain to see if any transactions involved that key.

A pruned node has processed the whole blockchain, but only keeps the tail end of the data. This means that when you import a private key in a pruned node, the pruned node does not have the data to check for relevant transactions. That's why it is incompatible with the rescan requirement. To find the transactions related to the key, you will need to repeat the initial synchronization of the blockchain.


Quote

I think your choices are

Restart your Bitcore-core node with adequate diskspace and pruning mode disabled, wait for it to sync all over again and then use importprivkey or
Import or sweep your private key into a different wallet such as Electrum. Optionally transfer the money back to your Bitcoin-core wallet. This might be quicker but you won't get the full transaction history back into Bitcoin-core


Thats what i ran into last time, waited several day for the sync, didnt pay attention to the prunning option, and i already had my wallet file but didnt put in the folder when it synced. Then i put the wallet back and it says cant rescan  need to download everything again Huh

Since then i disabled the prunning mode.

But maybe its not like this anymore idk


If im not mistaken when the pruning mode is enabled you can chose the amount of data to keep ( eg 2gb ) so it seems incompatible in the principle to being able to keep everything with a fixed space didnt seem to me it was keeping all the chainstate but maybe im wrong.
57  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 06:05:39 PM
Yeah its also what i thought, it can keep up to date with newer blocks checking the pow and updating the balance of your wallet safely, or send transactions from your wallet's address safely, add newly generated "virgin" address but thats it they have to trust the pow for any utxo that transfer fund from older blocks,  cant really mine , cant import safely new address that already contain a balance from potentially older blocks ( or they have to re download everything).

I dont know what is the network demand for blocks probably newer blocks are in higher demand than olders but pruned node cant fully validate all tx and have to trust the pow for any transactions containing inputs from older blocks.

pruned nodes dont have Pow, pruned has nothing to do with PoW
the hash is not about PoW its about the 'chain' of Id's where the chain is a unique cryptography hash that is formed by the unique data of the block which contains the ID of the last block.
destroy the block means the ID wont be able to check the block is still in correct form, because there is no block. meaning

though pruned nodes do validate all transactions when it does the IBD. it then does not keep the blocks. meaning it has to trust that a hacker hasnt manipulated the data afterwards because they cant just do a local re-check in seconds to ensure the database they have has not altered.

pruned nodes are not supposed to be deemed as full nodes minus archiving
but instead litewallets + better verification at first sight

in short,
not fullnode minus
but litewallet plus

other features disabled when 'prune' is set. is
when not storing all UTXO's and only storing UTXO associated with your keys. you then dont relay other peoples transactions. because you cant verify transactions at the relay stage(unconfirmed)

They can still check the pow from block headers to make sure the transactions that they cant validate in New blocks are considered valid by the majority hash rate.
58  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 04:33:48 PM
But pruned nodes cant validate new block if they dont have the full history of transactions ? So they cant mine either ? Or only can confirm transactions that has no input older than the older block they have .

For me pruned node are like half way toward spv who was not fully implemented ?

Last time i tried for exemple to add new address or import a wallet into a pruned node it said it had to re download everything ( maybe its not the case anymore or i mis understood something).

I have a full non pruned node now to avoid these issues.

a hacker can attack your node and slip in a UTXO.. and you have no way to then go back and check that the UTXO belonged to an old block. because you dont store old blocks.
there is no hash to confirm that the UTXO set has not been manipulated.

there is very strong reasons why blocks have hashes(to easily check data for edits)

Yeah its also what i thought, it can keep up to date with newer blocks checking the pow and updating the balance of your wallet safely, or send transactions from your wallet's address safely, add newly generated "virgin" address but thats it they have to trust the pow for any utxo that transfer fund from older blocks,  cant really mine , cant import safely new address that already contain a balance from potentially older blocks ( or they have to re download everything).

I dont know what is the network demand for blocks probably newer blocks are in higher demand than olders but pruned node cant fully validate all tx and have to trust the pow for any transactions containing inputs from older blocks.
59  Other / Beginners & Help / Re: Definition of full node on: January 08, 2022, 04:20:35 PM
But pruned nodes cant validate new block if they dont have the full history of transactions ? So they cant mine either ? Or only can confirm transactions that has no input older than the oldest block they have .

For me pruned node are like half way toward spv who was not fully implemented ?

Last time i tried for exemple to add new address or import a wallet into a pruned node it said it had to re download everything ( maybe its not the case anymore or i mis understood something).

I have a full non pruned node now to avoid these issues.
60  Alternate cryptocurrencies / Altcoin Discussion / Re: Assuming on: January 08, 2022, 04:10:18 PM
There is no reason to think it would have more success than bch or bsv.
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