All transactions are final. You can't get your money back.

As others have pointed out already, this is the fee for the 2FA service (since TrustedCoin is holding one private key and co-signing your transactions).
You can read more about their fees (0.001 BTC per 20 transactions) here: https://api.trustedcoin.com/#/electrum-help.

Also, next time make sure to carefully read everything when setting up a wallet. Such mistakes can be very costly, especially with crypto currencies.
This is the screen where the fee is mentioned (which you obviously didn't read properly):

As ETFbitcoin already mentioned, the recovery software needs to know the type and structure of the file to recognize whether it is corrupted or not.
And this is not the case with an electrum-wallet-file without a file extension.

I'd also assume that your file is corrupted.

Do you still have the original drive where you have recovered it from ?
If so, you hopefully still have the untouched original ? In case you do, create an image of this drive (which should always be done; never work on the original drive) and try out another recovery software.

The recovery process is strictly depending on the software used. A different software does produce different results.


Unfortunately, your only possibility is to recover that file without any corruption 

This.

I'd recommend everyone to rather use an proper exchange (if possible) instead of using such services.
Not only those KYC-scams, but also the lack of verifiability and transparency are a big red flag for me (not mentioning all the attack vectors here..).

Currently there are scam accusations open against changenow. So, i'd probably avoid them if possible.

If one really has to use such a service and there is no other possibility of using an real exchange, i'd probably rather use changelly/shapeshift than anything else (simply because they are the 'most reputable' ones).


But IMO it is way safer to send your funds to an exchange, trade and withdraw, instead of using such a service.

You are always free to create your own wallet (and preferably share it with the community) 


The problem is that a very small minority of techy people does use an iphone / iOs.
Most techies/developers prefer full control over their device, open source and a fair price. Apple's products are exactly the opposite.

And that's mostly the reason why you see a big range of awesome applications (wallets, bitcoin-related and not-bitcoin-related) for android, but almost none for iOs.
Actually, i am not sure whether i have met any IT-guy with apple products at all yet.

But what are you trying to stress test ?

If you are trying to stress test other nodes (which is illegal if you don't have the permission) it is irrelevant how fast you can sign transaction.
You could simply broadcast them all at once, regardless whether it took you 1 or 100 minutes to create them.

What you are going to do is more like a benchmark of your own hardware, than a stress test of anything else.


What are you trying to accomplish with your test ? What do you want to test ?

How is this related to a stress test ?
You aren't stress testing anything besides your own hardware with mass signing transaction.

That's like saying: "I am going to stress test the post office by writing 100 words per minute".
If you do not send those mass letters (transactions), you aren't stress testing anything (besides yourself)
.

If you really want to test something, you'll need to actually test the network. Not your own hardware.

Unfortunately i am not sure whether core still uses a key pool (might still be possible, but not necessary).

But the reason for core not to use the xpriv to generate new addresses is, that you'd need to unlock your wallet in this case.
The better option would be to use the xpub (which probably is the case if there is no address pool anymore)




No. The legacy parameter is to choose the address type (legacy/segwit).
This is not related to the address generation itself.

If you truly believe it is impossible, you are wrong.

SMS and email are outdated protocols. Anyone can spoof / intercept / fake those messages.
And googles 2FA application isn't as secure as you might believe.


Also, even if YOUR account won't get hacked.. this doesn't mean that the exchange won't get hacked.

Do you remember Mt.Gox ? It was the safest and most secured exchange at that time.. But still all people lost their money. Nothing is impossible.

Besides advertising and simple spam, there is another option: Linking of multiple addresses to one entity.

In such a scenario, the attacker sends small amounts to multiple addresses. He then monitors these addresses and if he sees that this dust UTXO is being used together with different addresses
(either through using them in a single transaction or trough consolidating), he will be able to link those addresses together to one entity in control of these keys.

The only way to avoid such a potential de-anonymization is to 'block' the UTXO, so that the wallet won't be using it (it wouldn't be worth using it, since its roughly enough to pay for the fees itself).

Sometimes it is more helpful to explain what you want to achieve instead of asking about a particular step which you think will help you achieving your goal.

This sounds like a XY problem. May i ask what you exactly want to achieve (especially why you want to 'disable' source files) ?

Well.. something is happening which corrupts the blockchain.

Where do you have the blockchain stored ? If it's an external hard drive, this might cause the issue.
Core needs a continuous connection to the hard drive. That's not that easy to achieve with an external USB drive. 


What OS are you using ? And what drive do you use to store the data (SSD / HD / external / ... ) ?

Shapeshift and Changelly have a relatively good reputation.

Currently there are scam accusations open against ChangeNOW. Note sure whats going on there.

And i have never heard about N.Exchange.


You should really use such 'instant exchange services' only if you can't use an proper exchange.
Using an exchange should always be the preferred way. Not only are they safer than those service, they are fully transparent about the fees and the rate you'll pay in the end.

I'd never use such a service if i have the option to use an exchange.

There are definitely more (and better) wallets available for android. But there are still some for ios which do offer watching addresses.

Besides ArcBit, BitWallet also offers to import a xpub (which lets you view generate and view your receiving addresses).

If you only want to watch the addresses, but don't need real 'wallet functionality', you might as well use Ocular. This is a simple address tracker to view the balance.

No. The security of a wallet is NOT depending on the transaction fees.. It is depending on how the wallet stores/manages the private keys.


There are multiple types of wallets (from most secured to least secured):

• Cold wallet storage / Paper wallet:
  Private keys stored on an offline computer NEVER connected to the internet and only used for sensitive things (transaction signing)
  Very inconvenient, but also very secure
  
  
• Hardware wallet:
  Physical device. Private keys stored in an isolated offline environment. Can be plugged in into computers and used safely without the fear of private keys getting leaked.
  Easy to use and very secure. But costs 70$+
  
  
• Desktop wallet:
  Software wallet on your desktop. Should be open-source and private keys / wallet file should be encrypted.
  Easy to use and only as secure as your computer is
  
  
• Mobile wallet:
  The mobile equivalent to a desktop wallet. Can be a bit more or less secure. This depends on multiple factors
  
  
• Web wallet:
  Definitely the least secured wallet. Your private keys are stored on a server. Not recommended.
  
  
• Exchange / 3rd party site:
  Can not be considered a 'wallet'. 3rd party has full access to your money. Should be avoided.
  
  

The device is just one way to access these coins.
Noone should use any wallet without a backup. And this also applies to a hardware wallet.

Simply backup the seed and you are fine when losing the device.




Same applies here.. Simply reset the device and use your backup.




This applies to every (proper) wallet.
If somehow you are not entirely responsible for your wallet (means: someone else can access it), you are using a really bad wallet and should immediately abandon it.




Everyone should always have a backup. Devices can break. Especially electronic devices (e.g. lightning strike when plugged in and running).
Using a wallet (doesn't matter whether hardware-, desktop-, mobile-, etc..) without a backup is negligent and will - sooner or later - lead to a loss of funds.

You can find the logs in the armory data directory (default: C:\Users\YOUR_USER\AppData\Roaming\Armory).
You can access this directory by pressing WIN-key and R -> then enter: %appdata%\Armory\

The logs are named armorylog and dblog. You can use a service like patsebin to upload them.


Another way would be to export them by opening Armory and going to File -> Export Log File.

How much of the password do you actually know is correct ?

Are only the last 2 characters missing or are the spaces wrong / in wrong places ?

With only the last 2 chars missing it wouldn't take more than a few seconds to bruteforce your private key.
With also the spaces being in wrong places, it gets harder.. But still doable (if the rest of the password is correct).
With the 2 last chars missing, the spaces being in the wrong position AND the current spaces being 2 other chars, your chances get very slim.


I'd suggest you look at btcrecover (https://github.com/gurnec/btcrecover). It lets you create your own 'token' file. This corresponds to the 'way to iterate trough your password'.

It is not only much faster, but also doesn't change settings inside of windows.
There is absolutely no reason for a regular user to show the 'hidden files' inside of his explorer. This would just confuse people not that familiar with computer/windows.

The fastest, easiest and most elegant way has been mentioned by pooya87.

"%appdata%\Electrum\wallets" (or any other path, either absolute or via PATH-variable) can be entered in the file explorer and also in the 'Run Command' window (to be opened with WIN-key + R).


I'd always recommend to not change any settings if not necessary.

You can never be sure that an application doesn't have any vulnerabilities.

Usually EACH application has vulnerabilities. The question is just whether they are being found.
And without even checking the parameters, i am sure you did more 'mistakes'.

In your case i guess there isn't much an attacker could do (except for damaging your reputation through some kind of unusual behavior of your application and downtime).

But since your application doesn't handle sensitive information, i guess that not important (at least from the view of a regular user).

I am assuming there are quite some vulnerabilities in your application. You might want to check your application for basic attack vectors.

For example: You should check each parameter given to you before you application proceeds.






In this scenario your application should either (1) give an error message or (2) return to the main page.

But definitely NOT querying something in your database, giving me a litecoin address.


I would suggest you take your website offline and look through your code extremely carefully (or hire someone to do this).
Some malicious actor could probably damage your database.

This was just the first thing i have tried to catch your application off guard. There is probably a lot more possible..