Electrum is a lightweight Bitcoin client, based on a client-server protocol.

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Electrum command line: how to get the number of confirmations of a transaction

How do you get the number of confirmations a transaction has via the command line?
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What does it mean to have -1 confirmations?

I have -1 confirmations for an inbound transaction on my Electrum wallet. What does is it mean to have -1 confirmations?
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Questions about Electrum [closed]

I recently just installed the Electrum client and I have a couple questions. Is a new address generated in the receiving addresses each time a transaction is made? It sounds like that in the ...
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249 views

How do I load wallet.dat on new PC and import everything into Electrum?

My primary PC died last month due to what I believe is a motherboard error. My EVGA board displays "FF". The fans, drives, everything powers up as usual. But I don't hear any beep, no POST, no BIOS, ...
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38 views

getreceivedbyaddress without knowing the private key

Not considering any external services, is there any way (opensource implementation) that would keep up with the blockchain and expose an API with the same functionality as the original ...
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1answer
74 views

How to import entire Armory wallet into Electrum?

I've managed to import a private key, but how to import an entire wallet?
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1answer
111 views

Do electrum fully support Hierarchical Deterministic Wallets?

I'm curious if electrum fully support Hierarchical Deterministic Wallets (BIP32). I have seen in source code that some part of implementation is done. But there are also as I think some electrum ...
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1answer
134 views

Who can see my IP address while using Electrum

Who exactly is my IP exposed to when sending transactions in Electrum. I'm assuming the server operators can see it every time I connect (to query the servers about my balances). When I make a ...
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1answer
85 views

Couldn't an attacker cause online (watch-only) wallets to display malicious receiving addresses?

If I understand correctly, one of the main perks of using a deterministic watch-only wallet is the ability to generate new receiving addresses without syncing with the offline wallet, but this seems ...
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132 views

Is Electrum Cryptographically Secure?

Electrum seems very user friendly, thin and convenient, but is it cryptographically secure? One of the ways to attack any cryptographic system is to exploit weaknesses in the key generation ...
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62 views

More receive addresses with electrum

I cannot find any documentation or an option anywhere in the electrum client to put it into expert mode. I'm not even sure it can be done any longer, and it is important I raise the gap limit. It like ...
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119 views

What trust am I placing where when I use Electrum?

I have read that Electrum never is given your private keys (which makes sense), but I'm still unsure what sacrifices it makes in order to not require you to not store the entire ~14GB blockchain. So ...
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75 views

Selecting a computer for the OFFLINE Electrum Wallet

Would a Samsung Chromebook be a suitable choice to run the offline wallet??? I read that Chromebooks run a Unix based OS. (I would obviously disable networking, bluetooth etc.) Thanks
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187 views

Electrum Offline Storage - two different OS, multiple wallets

Regarding the instructions to create watch-only wallets in Electrum, I am clear on the intial setup and functionality, signing transactions, etc. but I have a few questions about going forward: Is ...
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171 views

Getting Public Key for transaction in electrum

Liberty.me has asked purchasers to all pay into a single address, but then to email the "public key" of the transaction. What is the public key of the transaction? How would you find it in Electrum?
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1answer
103 views

Bitcoin Application [closed]

I'm undertaking a Masters thesis and want to generate a wallet application for mobile devices. I do not need my application to be trustworthy or practical, simply because no-one other than me will ...
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1answer
312 views

Why can the same 12 words produce different seeds in an Electrum wallet file?

I was looking through an Electrum wallet file (from Electrum 1.9.6 for Windows if it matters) trying to understand what information was contained in it, and I couldn't initially figure out exactly ...
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472 views

Export wallet from Multibit to Electrum

So, MultiBit is not updating the transactions in my wallet, I can see the transactions in the blockchain etc, so the money is there but its just not quite working... I'm hoping to load that wallet ...
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1answer
122 views

Removing old public keys

I have an 'Electrum' wallet. I found some old public keys and imported them into it and then sent the bitcoins to an address in the main wallet. Now the transactions are confirmed and there are 0 ...
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2answers
288 views

Getting keys from multibit to export for electrum

I want to switch from Multibit to electrum. I can't figure out how to make use of the key multibit exports when it does a backup. Electrum and blockchain.info both seem to want something I can paste ...
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1answer
75 views

Opening Wallet with a different App

I just bought a couple of bitcoins. I got my wallet from Bitcom.org but I learned that there is this Electrum wallet which Id like to try. How do I open my wallet with the new App? thanks!
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Security for bitcoin businesses with Employees

Have been investigating some of the gateway apps and offline systems that are being developed. I was wondering what is the most secure way for a business to conduct itself. Let's use a bar as an ...
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1answer
89 views

Why am I able to export private keys using my seedless online Electrum wallet?

Why am I able to export private keys using my seedless online Electrum wallet? I thought this wallet is not meant to be able to expose any of my Bitcoin, but yet it has the option to export private ...
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1answer
607 views

How do I update offline Electrum wallet after receiving payment with Online seedless wallet?

How do I update offline Electrum wallet after receiving payment with Online seedless wallet? The guide at: http://electrum.org/tutorials.html#offline-mpk does not say. It only says how to make ...
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103 views

Is there a tutorial on how to set up a secure enviroment and use Electrum?

Which OS to use? How to verify that the OS is secure? How to download and install Electrum securely? There are many methods - binaries, git, homebrew, Ubuntu package, building from source. Is there ...
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510 views

How can I stop Electrum re-using change addresses?

I had three addresses containing BTC in my main Electrum wallet. I then performed more than three sends, to addresses not in my wallet. The first three sends used main wallet addresses to send BTC ...
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1k views

Electrum: “restoring” a wallet from a seed

Suppose I set up a wallet with a deterministic seed passphrase. I then use it, moving bitcoins around, sending some change to change addresses. Electrum will apparently create more addresses when ...
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215 views

What encryption does Electrum use for private keys in wallets?

Electrum can encrypt the private keys in wallets with a user entered password. But what encryption algorithm is used? I'd hope it is reasonably strong crypto. I've looked at the Electrum docs and ...
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3answers
387 views

How to verify that downloaded files such as Ubuntu, BitcoinQT, Armory, and Electrum have not been tampered with?

When creating a secure offline wallet, the first step is to download some software or OS (such as Ubunutu) to create the wallet. How can you verify that the software you are downloading has not been ...
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4answers
6k views

Offline Wallets: Electrum vs Armory?

I'd like to secure my bitcoin with an offline wallet. A lot of security conscious people seem to use Armory. I am trying to get a better understanding of the differences between these two clients. I ...
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387 views

Is Electrum's SPV (thin-client) implementation not P2P (as opposed to Multibit's)?

As far as I know, when I use Electrum I'm just choosing servers to trust that hold the blockchain. But in this recently published article I read this about Multibit: It uses a slightly weaker ...
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563 views

Key pool in wallet softwares

From my understanding, bitcoind/bitcoin-qt uses a key pool for their wallet, so when you create a wallet you are actually creating not just one but many addresses for sending/receiving transactions. ...
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496 views

Can't pay with Electrum - invalid password? [closed]

Update Well, it was my bad, dreadfully sorry guys. My bad with the password and seed, mixed some things up :( Everything restored successfully. I use Electrum 1.8.1 (portable edition) and ...
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955 views

How to do mass payouts in my application to multiple addresses at once, or very quickly?

Let's say it's pay day--I've accumulated a lot of bitcoins, and sent them all to a single address. I now want to pay a lot of addresses from this "pool" of coins, say anywhere between 100 and 10,000 ...
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639 views

Is there an Electrum based USB Distro?

I would like to use a USB with a Linux distro, ideally with Electrum. The advantage of this is that the USB does not need to contain any information, just entering the seed would be enough, which ...
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Is it possible to transfer a bitcoin wallet?

I am switching from bitcoin-qt to Electrum, and it seems as if I will need to download the blockchain again. Can I copy and paste my wallet.dat into Electrum's files?
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1answer
156 views

How to programmatically determine the number of bitcoins ever deposited to a given address?

I am building an application for which I wish users to be given a unique address to which they can freely deposit funds into their account. Meanwhile, I want to be able to both track their balance and ...
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1answer
213 views

Electrum hangs when sending bitcoins

I am using Electrum and when sending bitcoins I got a small window with a "Please Wait..." message, the problem is that it has been more than 1 hour and nothing happened! The window is still there and ...
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1answer
429 views

How do I use electrum on multiple computers?

I would like to use my electrum wallet on multiple computers. Is it just a matter of using my seed to recover the wallet on the other computer, or do I have to do something special to set it up?
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678 views

Electrum only offers online wallet, does it not?

I am currently using Bitcoin-Qt and have just surfed to Electrum's website. It seems that Electrum only offers an online wallet, not offline. Is that correct?
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327 views

Why does this transaction give me an error?

I am trying to script automatic payments without hosting a full node (my server doesn't have enough harddrive space). To do this I'm using electrum's python interface, and I have created a ...
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1answer
132 views

Does Electrum require the Satoshi client?

Bitcoin Armory is a client that sits on top of the official bitcoin client. Bitcoinj is a totally different client, separate from the official bitcoin client. Does Electrum also need the official ...
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430 views

Can private keys be exported more than once in Electrum client so long as the've not been spent?

Assuming one exported the private keys from one's offline Electrum wallet to a CSV file (also offline), they obviously have not been 'spent'. The whole thing was done offline. My question is this: if ...
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1answer
763 views

How do you safely set up a offline deterministic wallet?

There is a good tutorial for setting up a safe offline wallet with a regular bitcoin wallet here. If I want to set up a safe deterministic offline wallet (i.e. Electrum). What would be the right ...
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475 views

Can I use the official wallet to recover bitcoins sent to an alternative wallet?

I like alternative wallets like Armory and Electrum because they offer more features, some of which are fundamental for security and convenience. But I'm a bit worried about them not being ...
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448 views

What are some compelling reasons to use Electrum?

I currently use Bitcoin-qt on OSX and I'm considering switching to Electrum. What are the advantages and disadvantages to using Electrum over another Bitcoin client? My two major concerns are ...
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1answer
477 views

Electrum “Pending” what does it mean

My balance in Electrum shows "pending." What does pending mean?
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143 views

How to export an encrypted non-seedless electrum wallet into bitcoin-qt?

How to export an encrypted non-seedless electrum wallet into bitcoin-qt? Is it even possible? Cheers
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2answers
849 views

Why does electrum need connection to server when recovering a wallet from a seed?

Why does electrum client need connection to server when recovering a wallet from a seed? Isn't the generation of private keys done locally?
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Are the Thin clients Electrum and Multibit safe and secure?

How do Electrum and Multibit compare for being safe and secure. Both are open source. Are there any advantages, security wise, to use one or the other? I'm new to bitcoin and the only reason for ...