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2341  Bitcoin / Armory / Re: Armory Stuck at "Building Databases on: July 20, 2022, 05:22:05 PM
Alas still stuck, after the update
Did you delete the "databases" folder or you just updated Armory and didn't delete that folder?
As mentioned by nc50lc above, you can also rebuild and rescan databases.

If you did so but it didn't work, post the logs, so we can know what's causing the problem. You can find the logs in "armorylog" text file.
2342  Bitcoin / Bitcoin Discussion / Re: Why my balance is 0 btc in blockchain explore ? explain me please on: June 29, 2022, 08:57:01 PM
Walletexplorer can't be helpful here.
Walletexplorer put different addresses in a same wallet if they are co-spent in a transaction. For example, if you make a transaction and use addresses A and B as inputs of that, then both addresses go to a same wallet. This is all they do and there is no way they can know which of addresses is the change address.
2343  Bitcoin / Bitcoin Discussion / Re: Why is BTC transaction so slow on: June 28, 2022, 12:09:30 PM
When the user pays the optimal fee so that his transaction will go in the next block, what makes the next block confirmed more than 1 hour?
To mine a block, miners must solve a proof of work problem.
As the proof of work problem is solved through brute-force method, there is no way to know when exactly it will be solved. Given the difficulty of the proof-work problem, we only know that blocks are mined (roughly) every 10 minutes on average.
If the fee you pay for your transaction is high enough, your transaction will be included in the next block. But the time it takes for the next block to be found does't depend on the fee you paid at all. In the case it takes 1 hour for miners to find the solution, you have to wait 1 hour even if you have paid a very high fee.
2344  Economy / Web Wallets / Re: Blockchain.com issue on: June 28, 2022, 10:36:10 AM
Once it's charged, I will extract and delete important data. Then give it to some service center for repair.
Take note that even if you delete the files, they are not permanently gone and they may be still recoverable using some recovery tools.
When you delete a file, it means that you no longer need that file and your OS hides that file. The file exists until it's overwritten by some new data.  
2345  Bitcoin / Bitcoin Discussion / Re: Why is BTC transaction so slow on: June 28, 2022, 09:58:44 AM
This is not exactly true, since the bitcoin block time is 10 minutes. Meaning if you pay the maximum fee, you will end up with a confirmation time from 10 minutes to 1 second.
You are wrong too.
The block time isn't exactly 10 minutes. Blocks are mined (roughly) every 10 minutes on average.
A block may be confirmed a few seconds after the previous one. It's also possible that it takes more than an hour.
2346  Bitcoin / Electrum / Re: Best way to move wallets (2FA) from old pc to new pc on: June 27, 2022, 08:29:38 AM
now I understand that I have to transfer backup file from USB drive to C:\Users\(YourUserNAme)\AppData\Roaming\Electrum\wallets....
I would move the wallet file to the default location too. But note that you don't have to move the backup file to the default location. You can move the backup file to any location you want.


but can I copy default_wallet from same folder C:\Users\YourUserNAme)\AppData\Roaming\Electrum\wallets in old computer without using backup feature in file menu of Electrum application then just paste/transfer to same directory in new computer or I have to use backup feature in file menu?
There is no difference. Both can work as a backup.
When you click on "Save backup", electrum actually create a copy of your wallet file.
2347  Bitcoin / Development & Technical Discussion / Re: What is the drawback of PoS ? on: June 25, 2022, 09:39:47 PM
In this case I would expect that with a decent amount of miners, a PoS network should still be very decentralized, because it would be very unlikely that coincidentally all miners were geografically colocated.
First of all note that there is no miner in a POS cryptocurrency. Instead, people need to stake their coins.
In a POS cryptocurrency, people with more coins can have more power and since a significant percentage of the coins are usually owned by a few number of people, they can have full control over the network and make the coin centralized.
2348  Bitcoin / Bitcoin Discussion / Re: Why is BTC transaction so slow on: June 25, 2022, 09:28:25 PM
However Trustwallet is suck closed source wallet and doesn't have feature to set your own fee based on sat/byte.
It's true that trustwallet is closed source and it shouldn't be used. But it allows you to adjust the the transaction fee.
To do so, you should tap on "Setting" button at top right corner the screen before confirming transaction details. After that, you will see a new window in which you can enter the fee rate.
2349  Economy / Gambling / Re: FreeBitco.in-$200 FreeBTC⭐Win Lambo🔥0.2BTC DailyJackpot🏆$32,500 Wager Contest on: June 25, 2022, 08:23:11 PM
To my personal experience every time I have gambled 0.001 Bitcoin I got as a wagered amount a minimum of x22 or x23 so there is a chance you get 4.3 Golden tickets (rounding it a bit) daily
No. You get 1 Free golden ticket for every 0.005 BTC you wager and it doesn't matter whether you set the multiplier to 1.1 or 50.
Below is the information displayed on "Multiply BTC" page.


2350  Bitcoin / Bitcoin Technical Support / Re: Where does the transaction not successfully mined go to? on: June 25, 2022, 09:08:32 AM
1. Can a transaction ID in a block be the Same  before been spent, Or if the outputs of that transaction becomes fully can its ID be reused for a new transaction.
If all outputs of a transaction have been spent, (in theory) it's possible that a new transaction with the same ID is included in the blockchain. In practice, that's very very unlikely.
If there's a non-spent output in a transaction, even in theory it's impossible that a new transaction with the same ID is included in the blockchain. According to BIP30, a block can't include a transaction with the same ID as a not-fully-spent transaction.


2. Does a memory pool gets full? Then what happens to the unconfirmed transaction, where do they go to?
Yes. By default the mempool size is 300 MB. (A node can have a different setting.)
If the mempool reaches that capacity, the node has to remove the transactions paying low fee, so transactions paying higher fee can enter the mempool.


3. In the candidate's block what happens to the transactions that where not successfully mined do they still remained there
In every new block, some transactions are included in the blockchain. Other transactions stay in the mempool and wait for next blocks.
2351  Bitcoin / Development & Technical Discussion / Re: Full RBF on: June 24, 2022, 05:07:28 PM
Is that correct?
Yes.

The thing I don't understand is how the attacker can manage to do this and that's why I said it's very very unlikely.
For being successful, it's needed that majority of nodes see transaction_2 first and the honest party (the one who does CPFP) sees transaction_1 first.
2352  Bitcoin / Development & Technical Discussion / Re: Full RBF on: June 24, 2022, 04:28:03 PM
If each of the inputs that are used in the RBF-disabled CoinJoin don't have an RBF-enabled unconfirmed parent, then what's the problem?
The coinjoin transaction is using UTXO A and is non-RBF. UTXO A doesn't have any unconfirmed parent and there is no problem here.
There's another transaction made using UTXO A. In this transaction, there's another input which is UTXO B. This transaction is also non-RBF.

The two above transactions have been made at the same time. So, some nodes (including the other party of the coinjoin transaction) see the coinjoin transaction first and some nodes see the other one first.

The transaction that has created UTXO B is still unconfirmed. This transaction has been flagged as RBF. As this transaction is RBF-enabled, the sender can easily double-spend that.
With doing this, the transaction spending UTXO A and UTXO B is invalidated and now the coinjoin transaction is the only transaction that uses UTXO A. Now, the coinjoin transaction can be propagated and confirmed without any problem.

Note that the attacker isn't trying to invalidate the coinjoin transaction at all.
The attacker is only trying to force the other party to pay more fee for the coinjoin transaction. (The other party doesn't know what's causing the issue and think that the problem is with the low fee.)

Again, this is what I understood from o_e_l_e_o's post and I think it's very very unlikely that the attacker can succeed.


The CoinJoin transaction is consisted of some parties' inputs. One of those inputs might be an RBF-enabled unconfirmed parent, which can be abused by an attacker to disrupt mixing.
From my understanding, this is not the case here.
2353  Bitcoin / Development & Technical Discussion / Re: Full RBF on: June 24, 2022, 02:30:44 PM
In this case, shouldn't the CoinJoin/Lightning software warn for unconfirmed parent(s)?
The UTXO used in the coinjoin transaction doesn't have any unconfirmed parent at all.
That UTXO was combined with another UTXO in a different transaction at the same time as the coinjoin transaction. This is the transaction which was invalided with doubling-spending its parent.
As both transactions have been made at the same time, it's possible that the client see the coinjoin transaction before the other one and doesn't understand what's causing the issue.
This is my understanding from o_e_l_e_o's post and I really don't know how likely this is.

I wouldn't accept a non-RBF transaction which has an unconfirmed RBF-enabled parent as "settled".
Me too.


You mean can't be propagated and confirmed?
No.
2354  Bitcoin / Development & Technical Discussion / Re: Full RBF on: June 24, 2022, 08:35:30 AM
It all sounds like, with this change, we are doing intentional hardfork forcing everyone to upgrade to modified software, albeit without changing consensus rules.
Even if some nodes don't enable full RBF, there won't be any new chain and we won't have any hard fork.
It's possible that a transaction exists in a mempool while it doesn't exist in another mempool, but all nodes will still have the same blockchain.
2355  Economy / Exchanges / Re: Binance-US charge zero fee on Bitcoin usdt trading on: June 23, 2022, 10:49:30 PM
Odusko, it seems that you have shared a wrong link. It's about stock market and has nothing to do with your topic.
Anyone who is interested in this topic can visit the link below for more information.

Binance.US Launches Zero-Fee Bitcoin Trading
2356  Bitcoin / Bitcoin Technical Support / Re: Problems with Bitcoins Mined in 2009 on: June 23, 2022, 09:03:33 PM
This is what i do. I sign a transaction from an offline device. ...........
The problem here is that you can't create the watch-only wallet which you need for making the unsigned transaction.
Electrum doesn't support importing public keys and if you import the address instead of that, it won't show P2PK transactions.
2357  Bitcoin / Bitcoin Technical Support / Re: I lost my trust wallet! Pay reward! on: June 23, 2022, 08:26:56 PM
I don't know how trust wallet functions but if you have 12 word seed then you can try with Electrum.
Trustwallet gives you a 12-word BIP39 seed phrase and that's compatible with electrum.
From my understating, OP had two different wallets and now he/she has no access to the seed phrase of the one holding 17 BTC.
 

What is a shipping key?
I feel he/she is referring to transaction ID of the deposit made to the wallet.
2358  Bitcoin / Development & Technical Discussion / Re: Full RBF on: June 23, 2022, 05:15:25 PM
I don't understand this part. Since you've let a non-RBF transaction been propagated, how can you cancel it with an RBF unconfirmed parent?
If I have got o_e_l_e_o correctly:
The non-RBF transaction is invalidated with double-spending its unconfirmed parent (which is RBF-enabled).
With invalidating the parent, the child (which was spending the same UTXO as the coinjoin transaction) is removed from the mempool and the coinjoin transaction can be propagated and confirmed.
2359  Bitcoin / Bitcoin Technical Support / Re: I lost my trust wallet! Pay reward! on: June 23, 2022, 02:32:22 PM
I tried using FinderOuter, but I can't remember any words.
The tool can brute-force your seed phrase if you have missed some words.
Since you don't know any of the words, that's not possible.


Is there nothing I can do about it? I lost my laptop in the robbery, so I lost the words.
No, there is no way to recover the wallet if you don't have the seed phrase.
You can only recover the wallet you have its seed phrase.
2360  Bitcoin / Hardware wallets / Re: Which cold wallet to buy? on: June 23, 2022, 02:23:12 PM
I have £3,000 on coinbase so its getting to a stage where I feel I need to move this over to something more secure.
Your feeling is right. It's not secure to keep your coins on an exchange.


I am just totally new to this so would just like an easy to use wallet that isn't too complicated.
You can also use electrum. It's open-source and give you full control over your fund.
(Download electrum only from its official website and do not forget to verify your download.)

Note that electrum only supports bitcoin and if don't create your wallet on an air-gapped device, it wouldn't be as secure as a hardware wallet.
For 100% security, you should use electrum on an air-gapped device or as already said, use a hardware wallet.


I have a question, if I was to move my crypto off of Coinbase and onto a hardware wallet - what if the price of a crypto I hold shoots up and I want to cash out profits?
Then you will have to a make transaction and move your coins to an exchange.


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