Topic: Bitcoin Core 0.21.0 Released (Read 3850 times)

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In June 2020, I bought Bitcoin for $ 11,000; it's not a lot of money, so I'm just wondering how this business works, why it goes up and down. I look at stocks to see if they have the opportunity to trade regularly. The cryptocurrency sector, as far as I know, is very unpredictable. A quick 30 second   will empty your bank account easily. As a result, you should know very well where to place your stop loss. I even use various swing trading tactics that I find on the internet,which help me explaining crypto in order to understand the cryptocurrency industry.

Bitcoin Core is a full node. It downloads and verifies all blocks and transactions. Additionally, it is a wallet software so all of your private keys are generated, stored, and managed by Bitcoin Core if you use its wallet.

Bitcoin Core is more secure and private than online wallets. Those wallets may also be custodial wallets where your Bitcoin is held by the service provider and they just promise to send the Bitcoin when you ask for it to be sent somewhere. Those web wallets are not private - the service provider can see all of your transactions and associate those transactions to you. They can do this trivially. Additionally, if they go offline, go out of business, or stop operating for whatever reason, your Bitcoin is lost. Bitcoin Core does not have those problems. If Bitcoin Core is no longer being developed, you can still use the software that you have downloaded and installed. Because Bitcoin Core is a full node, it is much harder to know which transactions are yours because your node will be receiving and sending all transactions on the network. Any that are yours blends in with the crowd of other transactions being relayed by Bitcoin Core.

Hello. Can someone explain the beauty of this bitcoin core? Why is it not easier to use online - the same paxful and others. I tried to install bitcoin core - synchronization took 4 days, everything is buggy because of this. And what kind of super functionality I did not see? Security?

I've been testing it for a while without problems

Lol... not by a long shot...

Is there anything we should be aware of with this release?

No. Bitcoin Core is the primary node software for Bitcoin.

Bitcoin core is new coin like Bitcoin cash?

Can you create a thread in the tech support forum for that? In your post, include the the contents of your debug.log file.

I have a problem inilizing my wallet.dat and found that the problem is with Core v0.21.0
Yesterday, after I received the last payment from nicehash, I open Bitcoin Core, but always while loading the same block, I think that the one in which the transfer from Nicehash is located, Bitcoin Core just closed without any error message.
After trying several times and reinitializing the wallet.dat, I installed v0.20.1 and the problem was solved ...

In that case, it's the createwallet command. You can read it's help to find out which arguments to set.

Yes.

Thank you. I'm going to try to keep using only the command line. I never used the GUI.
Anyways, the sqlite3 database is only meant for wallet data?

Just download and install (or compile and install) the new version. It will automatically pick up and use the data you already have. It is all backwards compatible.

You can create a new wallet using the menu option File > Create Wallet. Then just select the "Descriptor wallet" option in Advanced Options and you will have a descriptor wallet which uses sqlite3 as the backend.

I'm not sure if I should post this question here. If it's in the wrong thread, please move it.

I'm actually using Bitcoin Core v0.20.1.0-g7ff64311bee570874c4f0dfa18f518552188df08.

From what I read from achow101 blogpost, Bitcoin Core made some major changes, and among others, there is the descriptor wallets and the sqlite3 database.

How should I proceed to avoid having to re-download the entire blockchain and redinex it all again? I can't just compile the new version and use the same folder, can I?

And I want to start using sqlite3 and the new wallets.

It's also security theatre because most of the coins in circulation are stored in addresses that have been reused.  "If you owe the bank $100 that's your problem. If you owe the bank $100 million, that's the bank's problem."  -- even if it did provide some protection to you (though I don't agree that it does, for the reason Carlton notes), it wouldn't matter because of everyone elses exposure.

I'm pretty confident that I started that whole meme that the hashing was protective,  I intended it as just a minor quip that it wasn't necessarily a pure waste of resources and might have some fringe benefit.  People have spun it into something I never intended, and I regret suggesting it.

supposedly, hash-wrapping the public key is (perhaps) pointless to protect against a quantum computer, providing such a computer is fast enough...

the public key must be revealed in order to spend from a bitcoin "address" (which is simply a hash the underlying public key). When a transaction is signed and broadcast, the scriptPubkey in that transaction contains the public key that a quantum computer would use to calculate the corresponding private key. So, if the QC can listen for new transactions added to it's Bitcoin mempool, and compute the private key before that transaction is confirmed in a block (average block interval is 10 minutes, as we know), then they may also have enough time to steal the transaction inputs by spending using a higher fee to an address they control.

in that scenario, the window of opportunity that exists while the transaction is "in-flight" reduces the protection of hashing the public key to mere security theater

You are referring to address reuse.

I like to use the space travel analogy here, saying it makes it "easier" for the attacker to find your private key by revealing your public key compared to only revealing your pubkey hash is like saying traveling to Uranus (19.2 AU) is easier than traveling to Neptune (30.1 AU, farthest planet from earth). The statement is not wrong but the act remains astronomically difficult that makes both impossible, and will remain impossible in our lifetime (possibly).

This is off-topic by the way, you should start new topics for stuff like this.

so kinda on topic, sending btc to an address and never sending it out 0 transactions after first deposit. Would that stop quantum computers from finding the private key.. Guess no seeing public address you sent it to is on the blockchain.


reason i am asking is there is a youtuber out there thinking moving btc into an empty wallet is more secure then a one you use all the time.

here is is last post to me:

" when sending your coins to an address you are not revealing the public key of the destination wallet, only the source wallet (which will now be empty, so they can have that public key, its empty),
The receiving wallet is only exposing one of multiple sending addresses (not the public key, that is different). So theoretically the attacker could use the sending address to derive the public key and then from the public key derive the private key. (this is currently impossible)
but why make it easier by exposing the public key by SPENDING FROM the wallet.
The point is that a wallet that has never been spent from is more secure than a wallet that has sent transactions out. You may not agree with me and that is your prerogative, but for me, best practice is store crypto in a "one-way" wallet (only deposits). If I need to send/spend from the wallet, I send the remaining balance to a new "one-way" wallet(deposit only)"



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