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

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Generate addresses without private key: Stealth addresses vs Master Public Key

In my case a store owner has different POS terminals. On none of the terminals should be a private key stored! The owner has one wallet, where he wants to get all transactions aggregated, done on the ...
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1answer
29 views

How to buy bitcoin online and then store it on my desktop wallet?

Based on popular recommendations, I have started with Electrum as my Ubuntu desktop wallet and Coinbase as the way to buy bitcoin online. However, it doesn't seem like there is an easy way to ...
2
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1answer
17 views

Restore Seed with Password

I am running Electrum 2.3.2. I had 2-factor authentication enabled with Google Authenticator, but then got a new phone. I know the password to the wallet but do not have the 2-factor code anymore. I ...
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2answers
62 views

Is 12-word seed phrase safe enough?

Is 12-word seed phrase (as used by Electrum for example) safe enough for generating an offline wallet? My understanding is this: 2048 words pool make 11 bits of entrophy per word. 12 words in seed ...
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10 views

Electrum + Trezor - Rename address labels only allows one label to be defined

Using Electrum 2.3.3 on Ubuntu 14.04.2 with a Trezor (firmware 1.3.3), I'm having trouble with the account labels. When I rename an account, it displays the new label. However, when I rename another ...
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14 views

Does the electrum client decide the best chain on the basis of how much work was done, or how long the chain is?

Bitcoin Core compares blockchains based on how much work they contain, and not necessarily which one is longest. This is useful for preventing time warp attacks. This comment on HN says that the ...
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31 views

how do I send my imported wallet on electrum

I have been able to transfer my bitcoin to electrum but am facing hard time to pay it or send my coins. A form appear and I fill out and there is only two option to choose to click create unsigned ...
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9 views

How do I transfer my wallet from bitcoin qt to electrum without downloading the whole blockchain? [duplicate]

I made a big mistake: I downloaded the bitcoin qt wallet without downloading the blockchain, but I generated an address to send bitcoins to this wallet. And the blockchain says that I received some. ...
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1answer
54 views

Ramifications of creating Electrum 2.x seeds which are not BIP39

Electrum 2.0 seeds (mnemonic phrases) are created with a checksum based algorithm (such that the hmac_sha512 starts with 01. It's usually a 13 word seed, but can be 12 in some circumstances. If all ...
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1answer
48 views

Where could I post an article about Electrum to get it reviewed?

I am writing a short, basic article about Electrum. I am quite new to bitcoins, and was hoping I could get somebody to have a look at it, to check that I didn't write anything totally stupid (which ...
0
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1answer
75 views

Electrum 2.x sweep feature

Could some explain how Electrum sweep feature works? As I understand "sweep" can be used only after importing private key into wallet. But private key can't be imported into deterministic Electrum ...
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1answer
27 views

Electrum server over http

Is it possible to communicate with an electrum server using http? I'm interested in building a browser extension. I also see this message on the electrum chrome plugin Unfortunately, all public ...
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47 views

Installing Electrum on a cold wallet linux usb

I don't usually use linux but I'm looking to start using it more, if I can just figure out how to do anything. . . I'm using Ubuntu on a usb, I've downloaded Electrum (from the site since I couldn't ...
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1answer
124 views

How do I create a new address in Electrum?

In Electrum, there is no "New Address" button to be found. I tried under the tab Addresses, but nothing there. If I go to Console and try create(), then it returns: Traceback (most recent call last): ...
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1answer
46 views

Having problem implementing Electrum's BIP32 Key deriviation path

I'm trying to create a BIP32 storefront that uses Electrum's key derivation path. The user passes me their MPK, and with every order I generate a new address based on the MPK. I'm able to generate ...
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1answer
50 views

Problems generating addresses using bip32

I'm trying to generate bip32 addresses using the following (the PHP version). https://github.com/prusnak/addrgen The author provides a test MPK which I can get working that looks like this: ...
2
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1answer
62 views

import btc electrum wallet into coinomi

can I import btc electrum wallet into my coinomi mulit-currency wallet app? They both use electrum servers and they both have seeds so it looks like they are a similar kind of wallet. In electrum I ...
1
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1answer
30 views

Electrum 2 validation: how is the HMAC always 01…?

Electrum version 2 creates a seed from a random number which is then encoded as a mnemonic. The seed is validated by checking that the hmac begins with the bytes 01 or 101 for standard and 2fa types, ...
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2answers
102 views

How to check BTC transaction when buying face to face?

I have never bought bitcoins face to face. Don't have iphone/ipad and therefore I would need answers on the following question: What do I need to have on my cell phone in order to provide seller my ...
4
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1answer
114 views

How does Electrum make a keypair out of a seed?

Electrum uses a seed of 12 words to generate a keypair and then hierarchically generates addresses out of that keypair. I know how to generate hierarchic addresses from a keypair, but what I don't ...
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0answers
57 views

Electrum - Why do I have to Restore every time I use it?

I did not forget my password. I have been done dozens of transactions with Electrum, and every time I try to send bitcoins, I get "Invalid Password". So I restore from seed, set a new password, use it ...
0
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1answer
70 views

electrum - how to rename automatic a new wallet?

I am looking for a possibility to rename automatically new wallets. my problem is that when I restore a wallet by terminal I get this error: "Remove the existing wallet first!" But if I rename the ...
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0answers
73 views

electrum CLI - 'daemon is not connected'

I installed Electrum on my Raspberry Pi. Then, I ran electrum create to make a wallet. Then, I ran electrum daemon start to start the background process. I'm currently trying to query the balance ...
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2answers
176 views

How can I run an Electrum console command from outside Electrum (in Linux)?

I want to use my electrum wallet balance in my another python application. How do I make a call to the getbalance() function?
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2answers
102 views

How do I view the extended public key in Electrum?

Someone's asking for my extended public key. How do I view this? What are the consequences of giving this to someone? Can they steal my Bitcoins if I give this to someone?
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1answer
121 views

What BIP32 derivation path does Electrum use?

Electrum 2.0 and up uses BIP0032 internally. I want to write code that generates the same addresses. I can't find any information about this online. What BIP32 paths does it use to generate ...
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3answers
172 views

Electrum 2.0: non-BIP39/32 standardisation complicates matters immensely. Why?

Electrum 2.0 has been causing me some frustration, insofar as it seems to be a non-standard implementation of BIP32/BIP39 (HD wallets, mnemonic seed, respectively). The wallet in question is a 2of2 ...
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0answers
36 views

Is it possible to import transaction history from an old electrum wallet to a new electrum wallet?

I see there is an option to export history but no option to import history. It would be nice to keep all my history in one wallet. Thx.
3
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1answer
170 views

Why are Electrum 2.x mnemonic sentences thirteen words long?

The 2.x version of Electrum uses mnemonic sentences that are 13 words long. However, 1.x versions use a sentence only 12 words long. I realize that 2.x changed the derivation of key pairs ...
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45 views

Why is “New Account” grayed out in Electrum?

When creating my wallet, I chose the options "Create new wallet" and "Standard wallet." I think this is a BIP32-based wallet. As you can see in the screenshot below, "New Account" is grayed out. Why ...
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1answer
402 views

Can I import my wallet from my bitcoin core for electrum?

Bitcoin-qt, now bitcoin core is insane. It consumes 40GB hard disk space. It hogs network. I am thinking of using Electrum or something like that. I want to use another bitcoin client. Electrum is ...
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2answers
141 views

Using Armory Watch-Only wallet in Electrum?

Is it possible to import a Watch-Only wallet that was made in Armory into Electrum? I like to use Armory for cold storage but like Electrum more for hot wallets because it's lightweight and you never ...
2
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1answer
42 views

Electrum Wallet - Is it possible to specify inputs in new transaction?

In my wallet, I have bitcoins belonging to three different addresses. I want to send the bitcoins from one of those addresses elsewhere. This is made easier, perhaps, by the fact that the balance of ...
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2answers
59 views

Electrum: seed is 0 length / empty

I installed electrum a while back and noted down the 12 word seed. Haven't used it for a few months, but now when I go to view my seed (clicking on the seed icon on the bottom right of the GUI), it ...
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61 views

Downloaded electrum, restored an old wallet, now BTC are stuck. How can I get them out?

How can I send them or reset password? Everytime I try to send it says invalid password. I tried by a couple different ways without luck. I deleted the wallet. Then I downloaded again and created ...
3
votes
1answer
250 views

Electrum wallet - Can not send bitcoins

Does anybody know what this code means? error: {u'message': u'64: dust', u'code': -26} I've managed to send bitcoins once, same settings, but it only worked once. Any help is welcome, thanks!
2
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1answer
242 views

What does it mean when addresses are labelled “beyond the gap limit (highlighted red)”?

There is a lot of red highlighting in the 'Label' column of my online/watch-only Electrum client, including for addresses which contain considerable balances. After trying to find out what this ...
2
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2answers
127 views

How to recover a deterministic wallet offline?

I know that in the case of electrum there is a gap limit and it will keep generating addresses until it finds a number of consecutive empty addresses equal to the gap limit. What about if I want to ...
0
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1answer
187 views

Some newbie questions about bitcoin transactions and anonymity

I am totally new to the Bitcoin thing and have installed Electrum yesterday after having read a lot of reviews on different local wallet options. I am not really planning to use it yet, but I want to ...
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1answer
105 views

How do I chose the address to send to in Electrum? Can i send from a new made address with no transactions? [closed]

How do I chose the address to send to in Electrum? (for Electrum) Can the seed recovery mechanism in Electrum be bruteforced? 2.1. Since any seed makes some especial addresses (correct me if i'm ...
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0answers
130 views

Is there a way to recover the original electrum seed from the encrypted one?

So I accidentally lost my electrum seed and password, but I still have the wallet file, so I was wondering if there is a way to recover the original seed from the encrypted one? I think my password ...
2
votes
1answer
1k views

Can't connect Electrum to a Network so that I can receive my bitcoins

I've looked everywhere for an answer but can't find the right one for my situation. I'm using the linux based tails OS with persistent setup with my electrum wallet. Everything works fine and LBC ...
2
votes
1answer
58 views

Where to stop key derivation when looking at balance of a deterministic wallet

If I want to know the total balance in all the addresses which can be generated in a deterministic wallet (like electrum or armory). I have the master public key allowing me to derive an infinite ...
3
votes
3answers
579 views

Can I use my Electrum seed without Electrum?

Assumptions: I've memorized my electrum seed and will never forget it In the future, I'm robbed of everything but mind and body In the future, Electrum software is not easily accessible or I can ...
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2answers
148 views

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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0answers
36 views

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 ...
3
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2answers
3k 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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2answers
139 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 ...
2
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1answer
403 views

How to import entire Armory wallet into Electrum?

I've managed to import a private key, but how to import an entire wallet?
2
votes
1answer
357 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 ...