Safe Your private keys are encrypted and never leave your computer.Forgiving Your funds can be recovered from a secret phrase.Instant On Electrum is fast, because it uses servers that index the Bitcoin blockchain.No Lock-In You can export your private keys and use them in other Bitcoin clients.No Downtimes Electrum servers are decentralized and redundant.Your wallet is never down.Proof Checking Electrum Wallet verifies all the transactions in your history using SPV.Cold Storage Keep your private keys offline, and go online with a watching-only wallet.Multisig Split the permission to spend your coins between several wallets.Add-ons Electrum supports third-party plugins: Multisig services, Hardware wallets, etc. Documentation Community Support IRC channel: #electrum channel on Freenode Report bugs, request features, help with development: electrum page on GitHub Localization: https://crowdin.net/project/electrum Forums As well as on Reddit Official announcements are made on Twitter Electrum Servers Server source code: ElectrumX (new, faster implementation) How to run your own Electrum server: Install Guide Servers list and status (Lists only Bitcoin Electrum servers) Statistics from Petrkr's server About Electrum Electrum was created by Thomas Voegtlin in November 2011.

Since then, various developers have contributed to its source code.Developers with Github write access Thomas Voegtlin [github] [gpg] Maran Hidskes [github] [gpg] Michael Wozniak [github] [pgp] EagleTM [github] Impressum This website is hosted by Electrum Technologies GmbH Electrum Technologies was founded by Thomas Voegtlin in 2013.Its mission is to develop, package and distribute Electrum software, and to provide services to Bitcoin users and businesses.Address Electrum Technologies GmbH Waldemarstr 37a 10999 Berlin - Germany DisclaimerHow does Electrum work?Electrum’s focus is speed, with low resource usage and simplifying Bitcoin.Startup times are instant because it operates in conjunction with high-performance servers that handle the most complicated parts of the Bitcoin system.Does Electrum trust servers?Not really; the Electrum client never sends private keys to the servers.

In addition, it verifies the information reported by servers, using a technique called What is the Seed?The seed is a random phrase that is used to generate your private keys.Example: Your wallet can be entirely recovered from its seed.For this, select the “restore wallet” option in the startup.bitcoin donation apiHow secure is the seed?ethereum armThe seed phrase created by Electrum has 132 bits of entropy.ethereum tutorial youtubeThis means that it provides the same level of security as a Bitcoin private key (of length 256 bits).bitcoin fedora rpmIndeed, an elliptic curve key of length n provides n/2 bits of security.bitcoin japan scandal

I have forgotten my password.What can I do?It is not possible to recover your password.However, you can restore your wallet from its seed phrase, and choose a new password.If you lose both your password and your seed, there is no way to recover your money.This is why we ask you to save your seed phrase on paper.bitcoin easy apsMy transaction has been unconfirmed for a long time.bitcoin bubble april 2013Bitcoin transactions become ‘confirmed’ when miners accept to write them in the Bitcoin blockchain.bitcoin nswIn general, the speed of confirmation depends on the fee you attach to your transaction; miners prioritize transaction that pay the highest fees.sweden bitcoin exchange

Recent versions of Electrum use ‘dynamic fees’, in order to make sure that the fee you pay with your transaction is adequate.This feature is enabled by default in recent versions of Electrum.If you have made a transaction that is unconfirmed, you can: Wait for a long time.Eventually, your transaction will either be confirmed or cancelled.This might take several days.Increase the transaction fee.This is only possible for ‘replaceable’ transactions.To create this type of transaction, you must have enabled ‘Replace by Fee’ in your preferences, before sending the transaction.Create a ‘Child Pays For Parent’ transaction.A CPFP is a new transaction, that pays a high fee in order to compensate for the small fee of its parent transaction.It can be done by the recipient of the funds, or by the sender, if the transaction has a change output.What does it mean to “Freeze” an address in Electrum?When you freeze an address, the funds in that address will not be used for sending bitcoins.

You can not send Bitcoins if you don’t have enough funds in the non-frozen addresses.How is the wallet encrypted?Electrum uses two separate levels of encryption: Your seed and private keys are encrypted using AES-256-CBC.The private keys are decrypted only briefly, when you need to sign a transaction; for this you need to enter your password.This is done in order to minimize the amount of time during which sensitive information is unencrypted in your computer’s memory.In addition, your wallet file may be encrypted on disk.Note that the wallet information will remain unencrypted in the memory of your computer for the duration of your session.If a wallet is encrypted, then its password will be required in order to open it.Note that the password will not be kept in memory; Electrum does not need it in order to save the wallet on disk, because it uses asymmetric encryption (ECIES).Wallet file encryption is activated by default since version 2.8.

It is intended to protect your privacy, but also to prevent you from requesting bitcoins on a wallet that you do not control.Does Electrum support cold wallets?see Can I import private keys from other Bitcoin clients?In Electrum 2.0, you cannot import private keys in a wallet that has a seed.You should sweep them instead.If you want to import private keys and not sweep them you need to create a special wallet that does not have a seed.For this, create a new wallet, select “restore”, and instead of typing your seed, type a list of private keys, or a list of addresses if you want to create a watching-only wallet.You will need to back up this wallet, because it cannot be recovered from seed.Can I sweep private keys from other Bitcoin clients?Sweeping private keys means to send all the bitcoins they control to an existing address in your wallet.The private keys you sweep do not become a part of your wallet.Instead, all the bitcoins they control are sent to an address that has been deterministically generated from your wallet seed.

To sweep private keys go to Wallet menu -> Private Keys -> Sweep.Enter the private keys in the appropriate field.Leave the ‘Address’ field unchanged.That is the destination address and it’ll be from your existing electrum wallet.Where is my wallet file located?The default wallet file is called default_wallet which is created when you first run the application and located under the /wallets folder.On Windows: Show hidden files Go to UsersYourUserNameAppDataRoamingElectrumwallets On Mac: Open Finder Go to folder (shift+cmd+G) and type ~/.electrum On Linux: Home Folder Go -> Location and type ~/.electrum Can I do bulk payments with Electrum?You can create a transaction with several outputs.In the GUI, type each address and amount on a line, separated by a comma.Amounts are in the current unit set in the client.The total is shown in the GUI.You can also import a CSV file in the ‘Pay to’ field, by clicking on the folder icon.

Can Electrum create and sign raw transactions?Electrum lets you create and sign raw transactions right from the user interface using a form.Electrum freezes when I try to send bitcoins This might happen if you are trying to spend a large number of transactions outputs (for example, if you have collected hundreds of donations from a Bitcoin faucet).When you send Bitcoins, Electrum looks for unspent coins that are in your wallet, in order to create a new transaction.Unspent coins can have different values, much like physical coins and bills.If this happens, you should consolidate your transaction inputs, by sending smaller amounts of bitcoins to one of your wallet addresses; this would be the equivalent of exchanging a stack of nickels for a dollar bill.What is the gap limit?The gap limit is the maximum number of consecutive unused addresses in your deterministic sequence of addresses.Electrum uses it in order to stop looking for addresses.

In Electrum 2.0, it is set to 20 by default, so the client will get all addresses until 20 unused addresses are found.How can I pre-generate new addresses?Electrum will generate new addresses as you use them, until it hits the gap limit If you need to pre-generate more addresses, you can do so by typing wallet.create_new_address(False) in the console.This command will generate one new address.Note that the address will be shown with a red background in the address tab, to indicate that it is beyond the gap limit.The red color will remain until the gap is filled.WARNING: Addresses beyond the gap limit will not automatically be recovered from seed.To recover them will require either increasing the client’s gap limit or generating new addresses until the used addresses are found.If you wish to generate more than one address, you may use a ‘for’ loop.For example, if you wanted to generate 50 addresses, you could do this: x (0, .()

How to upgrade Electrum?Warning: always save your wallet seed on paper before doing an upgrade.To upgrade Electrum, just install the most recent version.The way to do this will depend on your OS.Note that your wallet files are stored separately from the software, so you can safely remove the old version of the software if your OS does not do it for you.Some Electrum upgrades will modify the format of your wallet files.For this reason, it is not recommended to downgrade Electrum to an older version, once you have opened your wallet file with the new version.The older version will not always be able to read the new wallet file.The following issues should be considered when upgrading Electrum 1.x wallets to Electrum 2.x: Electrum 2.x will need to regenerate all of your addresses during the upgrade process.Please allow it time to complete, and expect it to take a little longer than usual for Electrum to be ready.The contents of your wallet file will be replaced with an Electrum 2 wallet.