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3801  Economy / Speculation / Re: What will become of Bitcoin if the price keeps falling? on: August 30, 2018, 09:19:45 AM
IMO people do care way too much about the short term price.

If you are using bitcoin as a speculative investment or tools for trading, you might care about the price.. but that's not the intention of bitcoin.

If you are holding bitcoin because of the value you think it has, and if nothing fundamental changes.. what is then the reason to panic because of a decline in price ?
In the long term bitcoin will establish as a means of payment. Especially with all changes happening (schnorr, LN, .. ).

A decline in price would be just short term. The long term outlook is still very positive.
3802  Bitcoin / Development & Technical Discussion / Re: Which statement about the difficulty target is the correct one? on: August 30, 2018, 09:03:37 AM
From my past experience in mining sha-256 ...hash need to be greater to be accepted and if it is lower you try again and every re targeting period the difficulty increase.

You obviously don't have any experience at all.
The hash needs to be LOWER or EQUAL TO the target. This has been discussed in this thread and should be clear if you have completely read it.

The difficulty also does NOT increase each 2016 blocks. This depends on time it took to mine these blocks.
Overall, the difficulty rises. But there also were shorter streaks where the difficulty and hashrate was dropping over multiple periods.
3803  Bitcoin / Bitcoin Technical Support / Re: pywallet install help on: August 30, 2018, 08:51:53 AM
how and where I can install the pywallet program itself ?

You can get it from github (https://github.com/jackjack-jj/pywallet).

On linux install the following dependencies:
Code:
build-essential python-dev python-twisted python-bsddb3


Then run the .py file according to the readme file.


If you are running into trouble installing/using it, read the first 2 pages of this thread.

3804  Bitcoin / Development & Technical Discussion / Re: HELP : insight_bitcoin_tx_78ef on: August 30, 2018, 08:47:01 AM
I dont have my private keys, how can i find it if i have only the Pubkey and the insight_bitcoin files in JSON format ?

With only this information, you can't.

Since you have found the file in the electrum directory, you most probably have used electrum ?
Do you remember installing it ?

Also.. did you do what nc50lc suggested ?


This is the directory of electrum's wallet files (which contain all of your private keys).



how insight_bitcoin files can be on my PC ? is a proof a last missed transaction?

You can not 'miss' a transaction.
Transactions are broadcasted into the network. Once they are included in a block, they are confirmed.

You don't need this information to access your btc. You only need the corresponding private keys.
3805  Bitcoin / Development & Technical Discussion / Re: Block Size Scalability Issues on: August 30, 2018, 08:39:09 AM
We need massive amounts of settlement tx's on-chain, when people open & close channels on the Lightning Network and the price of a bitcoin must grow exponentially for miners to be profitable.  Undecided


With a big user base who is transacting daily on the LN, there will be enough on-chain transactions.
And if not, the fees for the on-chain transactions will be low enough for users to be attracted by on-chain tx's again.
I believe this will find an equilibrium.

The price does only have to grow exponentially if the miner do want to keep increasing the hashrate.
If mining gets unprofitable, the miner with the highest costs and lowest capital will stop mining and vice versa. This should also find an equilibrium.
 
3806  Bitcoin / Bitcoin Technical Support / Re: Transaction from Summer 2010 on: August 30, 2018, 08:29:52 AM
Huh? If they're not included in the main chain then they don't exist. There is only one chain - the longest chain - the "main chain".

That's not necessarily true.
These transactions do still exist inside of orphaned  blocks.

They are not part of the main chain, but these blocks do exist. And they are indexed and searchable.



Does anyone know how to see transactions that are good, that are not included in the main chain.

You can view the block info of orphaned blocks here: https://www.blockchain.com/en/btc/orphaned-blocks
The orphaned blocks are valid blocks which are not part of the main chain, but contain valid transactions.
3807  Bitcoin / Bitcoin Technical Support / Re: How can i calculate the average blocks per a day by just data from rpc commands on: August 29, 2018, 10:53:20 AM
How can i calculate the average blocks per a day by just data from rpc commands. I would also like to calculate the average time per a block this way as well any idea ?

The average amount of blocks per day and the average time per block are calculated using the same 2 variables: Time and Number of blocks.

You can accomplish this by comparing the height each 24 hours.

You can use this command to get the current height:

Code:
getblockcount

The first time measuring, you just write down the number.
24 hours later you can again execute the command and subtract this number from the old one. What you get are the number of blocks in the last 24 hours.

This information is enough to calculate all data you want.
3808  Bitcoin / Development & Technical Discussion / Re: HELP : insight_bitcoin_tx_78ef on: August 29, 2018, 08:55:34 AM
Thanks for your reply of my question about the " insight_bitcoin.." file.
also it is a BTC transaction or not?

This file seems to contain transaction information. But it is not a 'transaction you can redeem'.
To gain access to the BTC, you need access to the private keys associated to the address.



i mean i can recover my BTC or not ?

You might start off with explaining what happened.

Which OS are you using ?
Which wallet are/were you using ?
How did you lose access to your coins / What happened ?
Do you have any backup (e.g. 12 word mnemonic phrase, xprv.. , QR codes..  ) ?
3809  Bitcoin / Development & Technical Discussion / Re: Block Size Scalability Issues on: August 29, 2018, 08:51:01 AM
Bitcoin core will not even double the block size to 2 mb
SegWit already quadrupled the maximum block size to 4 MB. Your argument is invalid.


SegWit introduced a maximum block weight of 4.000.000 units (compared to 1.000.000 bytes).

A 'typical' (non-segwit) byte in a transaction has a weight of 4 units.A witness byte weighs 1 unit.

So, theoretically if all transactions would be segwit we'd have 4 times more transactions inside the blocks than pre-segwit.
But the block size itself (for the non-witness part of the transactions still is at 1 MB.
3810  Bitcoin / Development & Technical Discussion / Re: help mining pool (node init.js) [Error] on: August 29, 2018, 08:45:00 AM
Did you run npm install inside the correct directory ?


Try installing the missing module (async) via this command:

Code:
npm install --save async


If you are further running into trouble, copy the output of your terminal and paste it between code-tags ([ code] and [ /code] omitting the spaces)

3811  Bitcoin / Development & Technical Discussion / Re: And now the 1 mln dollar question on: August 29, 2018, 08:37:24 AM
What are the problems related to using Your in windows?
I don't use tor, but I find this privacy subject very interesting.

Using windows as a privacy orientated user is generally quite a big problem.
The leakage of information is tremendous.

But only switching the OS won't protect you that much. The user habits have to be changed. And the proper OS can help you with that.



I thought you would be anonymous using tor browser no matter what os.

Tor is not anonymous by default.
There are a lot of tracing techniques (which are being applied by law enforcement agencies).

It is not impossible to stay anonymous. But it takes more than simply just using tor.
3812  Bitcoin / Electrum / Re: List of currencies Electrum handles on: August 29, 2018, 08:25:22 AM
Is there a List of currencies Electrum handles somewhere please?
I've had a look in the docs. Searched here. TBS i would have thought there would be a sticky ....
Sorry if i've not looked hard enough ...

It is extremely important to note that the (only) official electrum is a BTC wallet. And the only official URL is https://electrum.org/.
Since electrum is open source (https://github.com/spesmilo/electrum), a lot of people forked the code and modified it to support different currencies.

However, this forks should NOT be regarded as safe. Without code reviewing/auditing, bad surprises may happen.
This does not mean that all forks are malicious. But there are malicious / buggy forks around under the name 'electrum'.
3813  Bitcoin / Hardware wallets / Re: Ledger Nano - Tablet on: August 29, 2018, 08:19:34 AM
Yes. One way would be as bitfocus has suggested which will give you the 'mobile' bridge to your nano s.

The other way would be to setup a GNU/Linux environment [1] on your android tablet and install ledger live on it.
This will give you the desktop version of the UI (ledger live) for your nano s.


[1] https://www.xda-developers.com/guide-installing-and-running-a-gnulinux-environment-on-any-android-device/
3814  Bitcoin / Bitcoin Technical Support / Re: Transaction from Summer 2010 on: August 29, 2018, 08:12:03 AM
When we were talking about transactions in 2010, if the coins still show up in an old  address, and they were sent to a cold wallet address, does that mean that the transaction never went through.

A cold wallet is simply a wallet which is not connected to the internet in any way. And a wallet is a piece of software which manages your private- and public- keys.
Whether a transactions went trough only depends on whether it has been included into a block. It doesn't matter whether the private key to access these funds is stored offline or online.
3815  Bitcoin / Wallet software / Re: Jaxx wallet restored from seed words - empty on: August 28, 2018, 12:00:44 PM
Is it a completely 'fresh' wallet ?
Or do the addresses inside this wallet have a transaction history ?

You might want to uninstall jaxx, delete (or better: just rename) the jaxx folder inside the 'AppData' folder and reinstall it.
If its a synchronization issue, this should fix it.

But, Jaxx is known to be buggy and vulnerable. It is NOT recommended to use this wallet.
As soon as you are able to access your coins again, please move them to a safer wallet.

3816  Bitcoin / Electrum / Re: Lost seed / lost smarfphone - 2fa wallet Electrum on: August 28, 2018, 07:55:47 AM
I can't remember/find my keys hence my 2FA isn't working which was of google authenticator.

I lost my phone and I don't think there's a way to restore the 2FA on another phone once you've lost the primary one?

The only way would be to use the backup of your GA codes (which have to be done when scanning the QR / entering the code).
Without a backup, unfortunately not.



I remember the password and have all the information somewhere hidden in my hardisk but I can't get pass the 2FA

Is there any solution?

You either need the seed (which contains 2 of 3 keys) to access your coins OR help from TrustedCoin (they have 1 key and your current wallet file contains 1 key).
3817  Bitcoin / Electrum / Re: Electrum not work with Trezor and can't send money on: August 28, 2018, 07:51:17 AM
The solution was to use his backup seed to restore his wallet on Electrum with the same config, which was supported by Electrum.


@OP: Note that after this step, your seed should be assumed to be compromised.
In order to keep the seed of a hardware wallet truly offline and isolated, you need to create a new seed with your trezor.
3818  Bitcoin / Bitcoin Technical Support / Re: How useful is Backup against Ransomware on: August 28, 2018, 07:39:02 AM
Cloud-Based Backup creates copies of all your files
I would definitely not upload wallets to cloud storage, that's like the opposite of cold storage.
I'm sort of undecided on this one. If you have a fully encrypted backup, then sure upload it to the clous (by fully encrypted I mean assymetrically encrypted using a public key-private key pair that is at least the strength of encryption system Bitcoin is based upon - the file is generally a few megabytes in size at most).

Encrypting the file asymmetrically would require a way larger key compared to encrypting it symmetrically.
The advantage of asymmetric encryption is the solution of the key exchange. It doesn't need one. But if you are only encrypting it as a backup for your own, using symmetric encryption is favorable.
Asymmetric keys have to be 10 (or more!) times larger than symmetric keys to have an equal bit strength.

Theoretically, a proper encrypted file with a key which is long enough to be considered safe should be absolutely fine. Even stored offline.
But the devil is in the detail. You have to rely on the software you use to encrypt the data to be correctly implemented (e.g. entropy).

In case of a data leak (on the cloud provider side) AND an incorrectly implemented algorithm, your keys are at risk. This scenario is pretty unlikely. But it should be considered nevertheless.
3819  Bitcoin / Bitcoin Technical Support / Re: Can I create new private key on: August 28, 2018, 07:20:45 AM
Bruteforcing the private key with 1 misstyped character can be done within one or two seconds. Thats 58*52 (= 3016) combinations.
Bruteforcing 2 characters does need to check the space of ( (52 choose 2) * 47 * 47 =) 4.308.174 combinations. This also can be done at home easily.
With 3, thats ( (52 choose 3) * 47 * 47 * 47 = ) 4.092.765.300 private keys to check. It starts to get rough here.

Basically, for N missing characters: (52 choose N ) * 47N


If you have misstyped 1 or 2 characters the time it takes to bruteforce the private key is very low. Definitely worth a try.
But with a higher number of chars, it pretty much gets impossible.

You just need tool to check all possibilities for valid private keys. Because of the checksum the majority of these keys won't be valid.
3820  Bitcoin / Armory / Re: Stuck in Offline on: August 26, 2018, 11:56:06 AM
Did you set the path manually ?

2018-08-23 20:52:06 (ERROR) -- BDM.pyc:197 - DB error: C:\Users\ben_000\AppData\Roaming/Bitcoin/blocks is not a valid path

The slashes (/) seem to be wrong. Windows does use backslashes (\).
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