Yes, your bitcoins got moved out of your address. If they got moved out of your address without you doing any transaction then your pc is probably compromised.
In this case i would recommend not just to clean your pc with an AV, but completely set up a new environment / reinstall the OS.
Quite a few people seem to have problem with gatehub according to [https://www.cryptocompare.com/wallets/gatehub/].
Seems quite buggy and additionally your private keys are stored on their server (encrypted with your private key), which should always be avoided.
If you are going to store BTC's again on your pc then make sure to keep everything up to date (people always neglect updates).
And for higher amounts which you can't afford to lose you may chose a hardware or paper wallet to store them safely.

I never experienced any problems with metamask. But i didn't use metamask too much.
They have their source published at GitHub (https://github.com/MetaMask).
Since metamask is used by quite a lot people and their code seems alright (didn't verify myself, but no bugs found so far by the community),
I think its fine to use. But the security of metamask is capped by your browser and PC itself.
For higher amounts (which you can't afford to lose) you should consider using a hardware/paper wallet for storing.

Myetherwallet together with a hardware wallet is the safest (handy) option.

This would not work for several different reasons. One would be the following:
Anyone with a C-class network (or a small portion of it) could just mine blocks almost without an ending ,
if he had 2+ nodes (e.g. 10.0.0.4 and 10.0.0.5). A Class C network includes 254 ip addresses (2^8 - 2).
Therefore if i own 10.0.0.1 - 10.0.0.254 (.0 = Network / .255 = Broadcast) and my node at .4 mines a block,
 the next mined Block will be from .5 and the next again from .4.
This would go forth and back until 1 of these 2 nodes crashed somehow.
A Class C network is the cheapest one to buy.
A small 'investment' for being able to generate all future blocks and control BTC. Proof by IP can not work.
Already thought about IPv6 when everyone will have 64.000+ ip's available?

The ledger wallet application queries an online ledger service to get your current balance.
Sometimes there are a few problems with the connection to the ledger server.
Did you already try to click on the reload button a few times (this seems to work better than ledgers auto update)?
You could also try to remove the app data (settings -> tools -> reset application data) to force your wallet to synchronise.

"listunspent" will show your unspent outputs (basically the btc's which you are able to send with your private keys).
To execute this command you have to open the console.

• Goto Help -> Debug (to open the debug window)
• Click on tab: console:
• Type "listunspent"

Then you should see if (and how much) coins are 'stored' in your addresses.

Did you already check the balance of your address on a blockexplorer (e.g. https://blockchain.info) ?
If the blockexplorer show zero transactions or zero balance, your address 'doesn't have any' BTC in it.

If "the bitcoin wallet" referes to the bitcoin wallet by andreas schildbach (https://play.google.com/store/apps/details?id=de.schildbach.wallet) then the encryption algorithm used is AES 256 bit.
You can decrypt it with OpenSSL:

You can find a small script to decrypt the file on your mobile here: https://github.com/jleni/wallet-decrypt
You can use this with the command:

Now you can write a small script which iterates through all of your possible passwords (maybe create a word list?) and tries to decrypt your file.
After it has been decrypted you will get a mnemonic seed + derivation path. This can be easily imported into electrum (https://electrum.org/) to access your funds.
I didn't look through the code of this script. So use it at your own risk. Make a backup of your backup before starting and preferably do this offline.

Mostly not directly. What wallet did you use to make this backup? And what 'extensions' of this backup are available to choose from??
I think it basically depends on what kind of backup this is and how it got encrypted. Depending on the length of the password the decrypting could take quite some time.
If you remember some characters of your password and/or had a short PW it might be possible, but with 8-9+ characters and additional chars this isn't doable (yet).
But we might help you out more if you would give us some additional information like wallet software used.

This was necessary in times where wallets pregenerated a fix amount of addresses. At this time you had to back your wallet.dat up every time a bunch of new addresses have been generated.
Most of the wallets now (including electrum) are using Hierarchical Deterministic (HD) wallets (https://en.bitcoin.it/wiki/Deterministic_wallet).
This means your 12 word seed (which you were prompted to write down at the initialisation of your wallet) is used to create private-/public- keypairs.
You can think of it as a mathematical equation: newAddress = mathFunctionOn(seed) + counter.
So backing up your 12 word seed phrase once is enough to be able to restore your coins into any BIP39 compatible wallet.

When you reset your nano s (and initialize it again) you will be given a random seed (out of 2.9 * 10^79).
This seed is used to generate your Master public key (MPK), which is then used to create all of your addresses.
Noone can find out that the current MPK is anyhow related to the last MPK. Simply because its just not possible.
Addresses generated with your current MPK can still be linked to other addresses generated with the same MPK if someone has this MPK.

You can theoretically install the old firmware again. But this won't get you any further since your seed still will shown as invalid.

Did you do what i recommended you to do?

Are all words in this list: https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt ?

If no: There you go, you misstyped 1 word
If yes: This probably won't be the case. If this really should be the case and ledger broke their old nano wallets with a new update or your device is somehow 'broken',
then you can throw your 24 word seed into a BIP39 mnemonic seed calculator (only do this offline!) and look up some addresses which have coins on it.
Afterwards just export those private keys and import them into a new wallet.

Did you spend the full input? Or did your wallet send the rest to an change address?

1) Look at your TX and look for the outputs.
If there is only 1 output (the output to the "destination wallet, localbitcoins") then you can't do this CPFP by yourself.
If there is a second output (your change):
2) In electrum goto Tab 'Adresses' -> Change adresses
3) Select your change address from the first step.
4) Right click on this address -> 'Spent from'
5) Set a fee which is high enouh to cover both transactions (approximately twice the recommended fee from  https://bitcoinfees.earn.com/)
6) Set one of your addresses as reciepent
7) Broadcast transaction

Make sure you set the fee enough, so its worth for a miner to include both transactions (the first with extremely low fee and the second with a high(!) fee) into his block.

The nano s is made to be used a lot. For (only) a cold storage a paper wallet would be enough.
A hardware wallet is made out of the purpose to being able to access your coins at any time and always perfectly secured.
The native ledger wallet (chrome-) app does have the ability to set fees either for slow, normal, fast confirmation or you can set them mannually.




This definetly would be better than just storing them on your everyday-pc. Depending on how much money you store on this pc and how secured your wallet has to be,
the ideal case would be if this pc never had a connection to the internet. A trezor/keepkey is also just a minicomputer.




This depends on 1) the encryption algorithm and 2) the password used to encrypt your files. With a non-broken encryption algorithm and a strong(enough) password your files are considered to be safe.
It doesn't matter whether you use this pc to only download wallets or safe youtube too. As long as it is connected to the pc there is always a risk of getting infected by malware.
Higher amounts (which you don't want to lose) should be stored offline for ideal security.

Any updates on the nano s usually don't take longer than 30 seconds. And no way they take up to 24 hours.
If it says invalid recovery phrase this means that at least one of your words is not in the BIP39 word list used to generate those seeds.
You could compare the BIP39 word list with the words you have written down (https://github.com/iancoleman/bip39).
If one from the words you have written down is not in this list you can try to replace it with similar looking words and try out if this works for you.

For a CPFP in electrum:

• Find the change address of your transaction stuck
• In electrum goto Adresses -> Change
• Select your address from 1) with right click and pick 'spend from'
• Now set a fee which is high enough to cover the fee of both transactions (goto https://bitcoinfees.earn.com/, for 2 TX's: double the recommended fee)
• Broadcast the TX

If electrum gives you an error you have to push/broadcast the TX by yourself. But usually this doesn't give an error.

Did you follow the instructions and only pasted the amount after the decimal point?
I don't know where you are from, but for the EU and SEPA transfers coinbase states as following:

Source: https://support.coinbase.com/customer/portal/articles/1767231-payment-methods-for-european-customers


Deposits usually take 3-5 weekdays. May be up to 7-8. If you didn't get your funds credited within this timeframe you should definetly contact the support.
Are you sure you went on the real coinbase (https://www.coinbase.com/) and not onto a phishing site?
And why did you already transfer money to coinbase while your bank account wasn't verified yet?

You can't send a transaction to replace the fee of an unconfirmed TX if you haven't set the RBF flag before.
But if you didn't spend the full amount sitting on your address you can try to 'execute' a child pays for parent (CPFP) transaction.
Since you apparently already imported your private keys into electrum you can look for your change address of this TX and spend from it.
You just have to create a transaction containing this change as input and has a fee which is high enough to cover both transactions.

If the input of the transaction is not fully going to the reciever (which i think applies to the majority of transactions) a change address is created.
An CPFP can be executed with any output and therefore also with the change address. This way a sender also can accelerate the TX without having to rely on the recipient.
Replace-by-fee is still the simpliest way of getting a stuck transaction confirmed. Just need to set the RBF flag each TX to let the nodes know this fee might get adjusted later on.
Sadly only a handful of wallets (e.g. electrum) provide the function to set this flag.

You can't just merge 2 blockchains to send coins 'from one to another'.
I think you might talk about interfaces which trigger a transaction on another chain?
An exchange has nothing to do with this kind of approach to create connected chains. There will be never the possibility to move coins across chains.
You can find a lot of useful information in some projects which deal with this kind of 'mechanism'. Ark [1] with their 'smart bridges', lisk [2] and rise[3] with sidechains.

[1] https://ark.io/
[2] https://lisk.io/get_started
[3] https://rise.vision

Is your client fully synchronised yet? Core needs to be synchronised until the block where the TX was included to show this balance.
If your address being shown on your windows client matches the address of your address from the mac client, everything is as it should be.


Does this mean you tried to upload your wallet.dat?
You shouln't do this. Never share your wallet.dat / private keys with anyone!
If you actually uploaded your wallet.dat you should treat it as compromised and change to a new wallet asap.

Android itself is very bad security-wise. A lot of exploits are in the wild which haven't been fixed yet (Some of them won't get fixed in older versions).
If you are thinking about storing quite an amount on your mobile phone i would not recommend to do that. Its ok for everyday payments, but nothing which should be used to store long term.


In that case the attacker would have an overview of all of your transactions (incoming/outgoing).
He would completely infiltrate your privacy. But he can't spend any coins without the private keys.
But you are not vulnerable to any further attack, if that is what you have meaned.