Electrum. Kryptowährungs Wallet - BitcoinWiki

How to run a bitcoin node as a traveling digital nomad?

I would like to upgrade my bitcoin citizenry status and operate a full node, but the problem is, I have not found an easy solution that works with my lifestyle.
I am a "digital nomad". I do not have any permanent home base. The longest I normally stay in any single location is about a month.
I travel light, since my entire life needs to fit into luggage.
Hardware that is already in my travel kit includes an iPhone, a Macbook, and a Trezor one.
Is there an easy solution to running a full node with this kind of lifestyle?
Can I utilize any of my current kit sufficiently? Or do I need separate/additional hardware?
Does it make sense to run a full node from my MacBook? Would this interfere with how I need to use and rely on my MacBook for my other tasks/work?
Do regular and intermittent internet stoppages matter? (Since I travel often, the node would be disconnected often and reconnected to a new WiFi network,etc).
Any insight and recommendation is greatly appreciated. Cheers
submitted by SpockSays to BitcoinBeginners [link] [comments]

Electrum Personal Server 0.2.0 - Features broadcasting of transactions through tor, for extra privacy

Electrum Personal Server 0.2.0 - Features broadcasting of transactions through tor, for extra privacy submitted by belcher_ to Bitcoin [link] [comments]

ElectrumX vs EPS and security of the server

Hi team, can you please explain two things:
1) I have read there is also an implementation called ElectrumX. But I only found a guide how to installl EPS by Chris Belcher on github. Can you linke me to a nice guide for ElectrumX? What are the main differences between ElectrumX vs EPS ?
2) What security related tradeoffs are you making when using EPS for your full node? EPS is a server, so are not servers able to "spy" on server activities and see everything in an un-encrypted manner?
3) When you run your own EPS how can you make sure that it works also in years? From what is its functionality depending? Is it some sort decentralized mash network? I like to know which scenario must take place in order for the EPS server infrastructure not to work anymore? the Worst case
Thanks all
submitted by celentano1234 to Electrum [link] [comments]

Air-gapped z-addresses; Is ZecWallet an option?

I've heard of Zcash for a while, but it wasn't until recently that I tried my hand playing around with the daemon and wallets.
Obviously, there's no point in using ZEC if you're only using t-addresses, but my desire for a z-address capable wallet certainly narrows the choice of wallets available to me.
Running a full node is no problem for me; I'd like to take advantage of a GUI if possible though. For that reason, I am drawn to ZecWallet's full node version. But I'm still uneasy when it comes to key security. (Can anyone share their experience with the ZecWallet paper wallet generator?)
From what I gather there is no wallet with HD support for t-addresses, is that right? Not much of a concern for me because I am interested in the shielded pool. I just figured t-addresses would support Electrum-style seeds but apparently not?
Sapling addresses seem to be exactly what I want; in particular I am drawn to their reusability and ability to export the view key. I was hoping this would ease the process of securing and backing up my private keys.
Here's my key handling protocol I use for Monero:
1) Generate the wallet on an air-gapped machine
2) This gives you a mnemonic seed. I write that down and keep it as an analog backup. By using a passphrase in conjunction with the seed, I can effectively encrypt this paper wallet easily.
3) Export the private view key and address to an online machine and make a watch-only wallet. This lets my watching wallet see incoming transactions
4) When outputs are received, I have to export the list of outputs to the air-gapped machine. The air-gapped machine uses this data to make signed key images.
5) I export the key images back to the watching wallet. At this point, the watching wallet can see outgoing transactions.
6) Now I can create unsigned transactions with the watching wallet, sign them in the air-gapped machine, and transmit them via the watching wallet using my full node.
The major benefit of using Monero in this way is that I only have to make a human-readable backup of my wallet once and I'm set for life.
Obviously, Zcash is going to be a little bit different. Since the core client doesn't give us mnemonic seed phrases, that complicates backup a little bit. What's the best way to back up ZEC? If I keep an up-to-date backup of my wallet.dat is that all I need? Is there an option in the wallet to encrypt this backup as well, or do I need to accomplish that externally with the likes of Veracrypt? I must admit the idea of unencrypted wallet data being written to my disk makes me uneasy.
I see that there is an option in zcash-cli to import/export the view key of Sapling addresses. However, I can't see the option to do so in ZecWallet, and when I do so manually via the CLI nothing seems to be reflected in ZecWallet.
Is ZecWallet by its very nature an obligatory hot wallet, or am I missing some functionality in the wallet?
My end goal is to run a ZEC full node on Qubes and hold my coins in z-addresses. Qubes allows me to make virtually air-gapped VMs to greatly simplify key management.
So for example when I use Bitcoin, I have a networked VM that runs a Bitcoind + Electrum Personal Server + Electrum Wallet stack, where I import my master public key. When I need to sign a transaction, I spin up a networkless VM equipped with Electrum and my private keys. Qrexec let's me easily ferry unsigned/signed transactions back and forth between the two VMs. Overall this provides a decent UX with above-average security and privacy. I'd like to port this general setup to Zcash.
To do so, I need a GUI wallet that supports both z-addresses and public/private key splitting. Does such a tool exist? (Can Electrum Personal Server be ported to ZEC?) If not, how can I streamline this process with the CLI?
I'm more familiar with Monero than Bitcoin, so the Zcash/Bitcoin CLIs are still a little foreign to me, though I am not "afraid" of CLI wallets in general. My Cryptonote muscle memory makes me prone to annoying little syntax errors I'd much rather do without.
My plan is to buy ZEC from Coinbase Pro, withdraw to a t-address, and then sweep my coins to a z-address. I want to monitor the balance of both t-addresses and z-addresses (and later send transactions) without ever exposing my private keys to the Internet.
However, it seems like the Zcash CLI is my only viable option for z-address watching wallets. Should I just play around on testnet until I get more familiar, or is there a GUI wallet solution out there that fits my needs? Does anyone have a cheat sheet for doing this via the CLI that could help me along the learning curve?
TL;DR New to Zcash, need advice as it relates to wallet backup, watching wallets, and z-addresses.
Assistance is much appreciated!
Edit: I don't suppose there's a way to use a Trezor Model T with a full node and or z-addresses?
submitted by spirtdica to zec [link] [comments]

Electrum hack attempt?

Recently restored a wallet from seed onto a new laptop.
Went through gpg4win to verify certificate/signature/public key from electrum.
During and immediately after restore process, antivirus flagged up various 'intrusion attempts' which look to have been blocked.
New laptop, almost zero software downloaded, any ideas on what happened?
I disconnected wifi, not yet connected again, any suggestions as to best route forward? Uninstall electrum and start all over again?
Any advice much appreciated.
submitted by btcforthewin to Electrum [link] [comments]

Electrum Personal Server for LTC?

I'm new to Litecoin, but have some familiarity with Bitcoin. I have successfully spun up and synced a Litecoin node. With Bitcoin, I use my Trezor in conjunction with a full node by way of Electrum wallet and Electrum Personal Server.
I know there is an Electrum LTC wallet. Has anyone ported the EPS code to LTC? Or is there another recommended wallet interface? Thanks
submitted by spirtdica to litecoin [link] [comments]

cold storage compatibility issues

Hello, I have been a fan of electrum because of its offline capability. I like that I can use Bitcoin while storing my private keys on a computer that has the wifi card removed and hot glue stuffed in the Ethernet port. However it looks like maybe the electrum developers have over-promised and under-delivered in this regard. Or, maybe they simply do not have the time, energy, resources to make this work in real life.
Let me explain. I have an old-ass computer that is running Ubuntu 12 (precise), this computer has electrum 2.5.4 installed with a cold-storage wallet that has my private key.
I want to send some bitcoin from that address to a new wallet on my desktop so I can spend the bitcoin. So I installed electrum (newest version 3.3.8) on my desktop, imported the bitcoin address, and created a transaction. Then I sent the transaction to the offline computer out of band, and verified that the out-of-band transmission worked by comparing the hash of the txn file on both the offline and online machines. Then I tried to open the txn file on the offline machine with Electrum 2.5.4. Well, guess what, it didn't work. Electrum 2.5.4 printed to the console:
Traceback (most recent call last):
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 2261, in do_process_from_file
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 577, in show_transaction
show_transaction(tx, self, tx_desc)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 37, in show_transaction
d = TxDialog(tx, parent, desc, prompt_if_unsaved)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 48, in __init__
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 523, in deserialize
d = deserialize(self.raw)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 454, in deserialize
d[inputs] = list(parse_input(vds) for i in xrange(n_vin))
OverflowError: Python int too large to convert to C long
That's pretty frustrating, the first thing I tried was to install Electrum 2.5.4 on my Desktop and try to create a new unsigned transaction with Electrum 2.5.4. However, this is a no-go because old versions of Electrum cannot connect to Electrum servers any more. So I have to try to update the Electrum on the Offline computer. But I'm not even sure if this is possible considering how ubuntu 12 it's definitely out of support at this point and the offline computer does not even have python3 installed, let alone the GTK stuff or whatever is probably required to run Electrum.
I'm starting to regret choosing a GUI-based wallet for my offline storage considering how hard it is to actually use this and how it simply melts over time... even just 5 years is is enough time to completely melt and destroy this software and make it un-usable. Time Catches All. So now I have to go out and buy a new computer that can run the updated OS, so I can install the new version of Electrum, so I can access my bitcoin.
Do you have any other ideas? Has anyone else experienced anything like this?
submitted by throwaway_23f32f to Electrum [link] [comments]

Groestlcoin 6th Anniversary Release


Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.

How to Upgrade?

If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer.
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications.

Other Linux



Download the Windows Installer (64 bit) here
Download the Windows Installer (32 bit) here
Download the Windows binaries (64 bit) here
Download the Windows binaries (32 bit) here
Download the OSX Installer here
Download the OSX binaries here
Download the Linux binaries (64 bit) here
Download the Linux binaries (32 bit) here
Download the ARM Linux binaries (64 bit) here
Download the ARM Linux binaries (32 bit) here


ALL NEW - Groestlcoin Moonshine iOS/Android Wallet

Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network.
GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.





ALL NEW! – HODL GRS Android Wallet

HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled.
HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user.
Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.



Main Release (Main Net)
Testnet Release


ALL NEW! – GroestlcoinSeed Savior

Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases.
This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats.
To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.


Live Version (Not Recommended)





ALL NEW! – Vanity Search Vanity Address Generator

NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator.
VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address.
VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase.
VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).






ALL NEW! – Groestlcoin EasyVanity 2020

Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet.
If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).




Remastered! – Groestlcoin WPF Desktop Wallet (v2.19.0.18)

Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode.
This wallet was previously deprecated but has been brought back to life with modern standards.


Remastered Improvements



ALL NEW! – BIP39 Key Tool

Groestlcoin BIP39 Key Tool is a GUI interface for generating Groestlcoin public and private keys. It is a standalone tool which can be used offline.



Linux :
 pip3 install -r requirements.txt python3 bip39\_gui.py 


ALL NEW! – Electrum Personal Server

Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node.
It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node.
Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine.
Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in.
Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet.
Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.



Linux / OSX (Instructions)


UPDATED – Android Wallet 7.38.1 - Main Net + Test Net

The app allows you to send and receive Groestlcoin on your device using QR codes and URI links.
When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.



Main Net
Main Net (FDroid)
Test Net


UPDATED – Groestlcoin Sentinel 3.5.06 (Android)

Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets).
Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.




UPDATED – P2Pool Test Net



Pre-Hosted Testnet P2Pool is available via http://testp2pool.groestlcoin.org:21330/static/


submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

No one is using my ElectrumX Server

I've had an ElectrumX Server set up, running and accessible over the Internet for almost two months and, judging from the logs, I'm the only person who's accessed it. Is this normal, or have I configured something incorrectly?
My node is listening for SSL on port 50002, with a letsencrypt certificate. I've got a cloudflare DNS record for bitcoin.mydomain pointing at my public IP and I have tested this on electrum clients on Internet connected machines (specifically ones not connected to my LAN) and it works fine. I have to type the domain name into the server selection box, though, it hasn't yet appeared on the list of peers the client picks up automatically in one of my test scenarios. This makes me suspect I'm not advertising my server correctly.
Here are the relevant parts of my elextrumx.conf:
# Peer networking PEER_DISCOVERY = on PEER_ANNOUNCE = on # Services SERVICES = rpc://localhost:8000,ssl://:50002 REPORT_SERICES = ssl://bitcoin.*mydomain*:50002 # TLS settings SSL_CERTFILE=/etc/letsencrypt/live/bitcoin.*mydomain*/fullchain.pem SSL_KEYFILE=/etc/letsencrypt/live/bitcoin.*mydomain*/privkey.pem 
Looks fine to me, which makes me suspect something else must be going on. Or, no one cares about using my node...
Anyone any ideas?
Many thanks.
submitted by notjustaprettybeard to Electrum [link] [comments]

I just spun up a Bitcoin Cash electrum server - here's why!

Two days ago someone in a local group was creating a guide for noobs to get their BCC from their private keys and his awkward solution was: Download BitcoinABC and the 138Gb blockchain from his server to speed up sync.
Kudos to him for trying to help people but it was so sad to see an experienced Bitcoin-user being so misguided about how Bitcoin is supposed to work for noobs.
N-Corea always spins the pro-1mb-argument that larger blocks is an entrance barrier for new users but the fact is that 99% of all users can use SPV-clients to access their Bitcoin in just two minutes - without any practical decrease in security or decentralization.
Full nodes are for the 1% that need them, like companies, developers and the extremely paranoid. The rest can happily use light clients.
If new users think they have to download 138Gb and waste crazy amounts of CPU-time to sync then that's a real entrance barrier and it might as well be 1Tb - which it soon will be no matter if the blocksize limit is 1Mb or 8Mb.
I don't really need to run a full node or an electrum server - but I choose to, to do my part in helping the network and to show that 99% of users don't need to run full nodes - they can just connect to mine or someone else's on the decentralized network.
My BitcoinCash electrumx server is running on: bitcoincash.i4s.dk
Donate if you like.
P.S. I see a lot of FUD about ElectronCash but I have yet to see any evidence the developers are hiding malicious code in the binaries and even if they are you can sign tx's offline.
P.P.S. I support SW2X but I don't believe BCC and SW2x are mutually exclusive.
submitted by forstuvning to btc [link] [comments]

Bitcoind finished synchronizing a few days ago, and the systemd service for Electrumx is running after the proper setup.

Why am I still unable to connect? I have the port forwarding set up, iptables rules, and everything, but no matter where I try to connect from, the connection fails. It does not work from LAN, let alone the Internet. The problem is that I have no idea where verbose ElectrumX log and debug files are located, there are no docs on such a thing anywhere.
Journalctl -u electrumx -f doesn't update much over time. But for the sake of posterity, I'll include a tail of it:
-- Logs begin at Fri 2019-08-09 18:36:29 EDT. -- Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:coin: BitcoinSegwit Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:network: mainnet Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:height: 499,601 Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:tip: 00000000000000000051b03a584817c09caaae919eb661dd93af1012efcccec0 Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:tx count: 282,736,468 Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:flushing DB cache at 1,200 MB Sep 18 20:10:21 [scrubbed] electrumx_server[5269]: INFO:DB:sync time so far: 32d 22h 55m Sep 18 20:10:25 [scrubbed] electrumx_server[5269]: INFO:History:history DB version: 0 Sep 18 20:10:25 [scrubbed] electrumx_server[5269]: INFO:History:flush count: 479 Sep 18 20:10:25 [scrubbed] electrumx_server[5269]: INFO:History:DB shut down uncleanly. Scanning for excess history flushes... 
Any ideas as to why I can't connect no matter which client I use? And where I can locate the actual log file instead of accessing it in some roundabout way?
EDIT: For the record, what I am trying to do is connect to an ElectrumX serveBitcoin full node that I own, from another device connected to LAN and/or the Internet.
submitted by PANIC_EXCEPTION to Electrum [link] [comments]

How do I use my bitcoin core node to validate transactions against BRD, HODL, Samourai or other mobile wallets???

I have my bitcoin core node setup. I use electrum personal server and can connect electrum to my own core node just fine. However, all of these mobile wallets that allow you to "switch to manual mode" and use your own bitcoin core node dont seem to work. Some allow you to put in your RPC Username/Password and others just allow you to put in an IP and a Port. I am obviously connecting via my own local LAN between my phone and the core node. I have server=1 set in my config and I have an RPC usepassword/port setup as well. What else needs to be done here or does anyone have any tips/tricks to get this to work? Thanks.
submitted by linkd22 to Bitcoin [link] [comments]

Not Connected [Simple fix 3.3.6+]

Hi, If you come across the above problem in your electrum wallet I have a solution to solve this.
The problem is caused due to ssl verification errors, if you check Electrum logs.
How to fix it:-
Open Electrum
  1. Go to Tools->Network
  2. Choose a server from electrum app or copy one from here https://1209k.com/bitcoin-eye/ele.php (Just copy the server name): e.g electrum3.hodlister.co NB:MAKE SURE YOU ARE USING TRUSTED SERVER, I RECCOMEND YOU USE THE ONES ALREADY IN THE APP
  3. Open cmd prompt/terminal and type ```ping electrum3.hodlister.co ``` replace electrum3.hodlister.co with the name you want, remove the quotes.
  4. Copy the IP address and paste into electrum in the server use the port specified on the site or leave to the one you found.
  5. Make sure "Select server automatically" is unticked so you can input the server name.
  6. Close and Enjoy............
BTC: 1DSWXvJQxUhdpg72c9nGESzaza6aWYGtMn
BCH: qpn0t39t570k5lrw2sk3p6hvxmetyuc5vy3p4cfs5h
Always download electrum desktop from electrum official server ( https://electrum.org/#home )
EDIT:I personally use port:110
submitted by kenkitt to Electrum [link] [comments]

Groestlcoin June Development Update & Release!

Another Quarter, Another Release! The Groestlcoin production factory has been working overtime as always in order to deliver even more tech to push Groestlcoin mainstream when the time comes.
There have been many new fantastic wallets and exchanges added to Groestlcoins repertoire over the past 3 months so we will re-cap these before moving on to what is new today.


What's New

Re-forged: Groestlcoin Samourai

Groestlcoin Samourai is a wallet for the streets. A modern Groestlcoin wallet hand-forged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are its extreme portability and is the most secure Groestlcoin mobile HD wallet.
We've built a wallet that Groestlcoin deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in, this is the perfect wallet for you.
![Groestlcoin Samourai Release Video](http://img.youtube.com/vi/i3WU8Tde8XQ/0.jpg)

Head over to the Groestlcoin Samourai Release Page here for the full release announcement.

New: GroestlImage

Groestlimage turns any file into a mnemonic phrase allowing users to generate Groestlcoin private keys and addresses based on the data URI of the provided file. A picture is worth a thousand Groestls.




Source Code


New: Groestlcoin Core Config Generator

Groestlcoin Core Config Generator is a simple GUI to configure the groestlcoin.conf file – A developers dream tool!
Each configuration option is available via the user interface, grouped by what attributes they affect. For ease of getting started with a new configuration, a variety of preset "node classes" are available on the right-hand-side of the screen. Selecting a preset will load our recommended base configuration for a node fitting that description, at which point you can then tune the configuration at the single option level.




Source Code


New: Groestlcoin Dumb Block Explorer

Dumb Block Explorer is a trivial block explorer written in a single PHP file. Now everybody can run their own block explorer.




Source Code


New: Groestlcoin SMS Push TX

Groestlcoin Simple Push TX is a server to push Groestlcoin transactions via SMS. Now everybody can send new transactions via SMS if the Internet is not usable (i.e. blocked by government entities or becomes otherwise unavailable).


Source Code


Update: Electrum-GRS 3.3.6

Electrum-GRS is Groestlcoins #1 thin-client for Windows, MacOS, Linux and Android, based on a client-server protocol. Supporting multi-sig wallets without the bloat of downloading the entire blockchain.

New Features (Universal)

New Features (Windows, MacOS, Linux)

New Features (Android)



Source Code

submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

How do I point Electron Cash to my own server (ABC/SV full node) ?


I have both Bitcoin SV and ABC full node on a personal Linux server. (headless, as TCP/8533 and TCP/8333 respectively)
how do I point my Electon Cash client towards it ? Simply choosing the IP address and custom port (TCP/8533) doesn't seem to work, as it says it cannot find server. Do I need only Bitcoin SV node (server side) or another layer on top, like Electron Cash SV server ?
What is ElectrumX?
Are there any public ElectrumX SV nodes?
submitted by Technologov to btc [link] [comments]

Edge wallet, why are you not using SSL connections?

I noticed that 'Edge wallet' clients (https://edge.app) are all using TCP instead of SSL, when connecting to my ElectrumX server.
I checked out the app and tried to connect to a custom node, as described as being possible here, but was unable to connect when using the SSL port.
Any chance for an update that enables SSL connections?
submitted by atroxes to btc [link] [comments]

Spun up a new Electron Cash BCH server on tor onion

Announcing a full node running with a new Electron Cash BCH server on tor onion.
I originally got into bitcoin six years ago as a coder. Started very enthusiastic but then left bitcoin development two years ago (with much less enthusiasm).
But now, thanks to Bitcoin Cash, it feels like the good old days again. So I'm back here and ready+eager to help grow the infrastructure which makes bitcoin more useful for the community. For BTC, I've used Electrum for years, an excellent SPV wallet, and am now using Electron Cash for BCH. But there are still too few servers for Electron Cash and even fewer which give user-privacy high priority.
My first contribution is cashskns6ycfx762.onion, which is a privacy-focused Electron server for the Bitcoin Cash mainnet. It runs the latest Bitcoin ABC 0.16.1 daemon and the ElectrumX 1.2 server configured for BCH.
This server operates as a hidden service instance, exclusively over Tor, and obviously does not log. Feel free to use it to get an extra layer of privacy for your Electron Cash wallet client. Unlike regular full nodes it is not able to link IPs to transactions or addresses. Just point Electron to cashskns6ycfx762.onion port 50001 or read more on the service's homepage, http://cashskns6ycfx762.onion/
Other features: Consistent uptime (link to uptime monitor from homepage) / multiple backups / ample bandwidth.
Hope that this is useful to someone!
submitted by fixngthat to btc [link] [comments]

BTCP Mainnet Launch Info

Bitcoin Private mainnet launch info (March 3, 2018


How to run a full node to support the network:

1) Compile from source code here.
2) Ensure that port 7933 is open on your server or network.
3) Run BTCP daemon.

Mining Pool Information

Please consider mining on our developer donation pool, which is 0% fee for the next two weeks, then 1.5% fee. All proceeds go to Bitcoin Private Development: https://pool.btcprivate.org
Otherwise, you can find many other pools listed here: https://btcprivate.org/pools.html


Full-Node Desktop Wallet - Windows, Mac, and Linux
Electrum Wallet - Windows, Mac, and Linux
Paper Wallet
Coinomi - Android only, iOS coming soon

How do I receive my BTCP?

For security, we recommend everyone moves their ZCL and/or BTC to a new address before using the private key for the address it was in for the fork. For now, SegWit BTC balances cannot be claimed. They should be available soon, please keep an eye out for it.
If you are using a multi-signature wallet, these will not apply to you. Go to the bottom.


1) Unzip and run BitcoinPrivateDesktopWallet.jar (after installing latest java).
2) Start it and allow the blockchain to sync.
3) Go to Wallet > Import One Private key -> this will take quite some time
4) Press yes when asked to sweep. Please be patient as the blockchain headers download. Your BTCP will be available after this.

Electrum (No z addresses yet)

1) Unzip and run electrum executable
2) Create a NEW wallet
3) Go to wallet > private keys > sweep
4) Enter all private keys and sweep BTCP into new address


1) Follow instructions according to https://coinomi.com

Electrum Multisignature

1) Unzip and run electrum executable
2) Press next, select multi signature, press next
3) Set to proper number of key holders and cosigners, press next
4) Press "I already have a seed" and enter it.
5) Enter public keys of other cosigners.
6) After wallet start up, make a new multi-sig wallet and send funds there for safety and security reasons.

Need help?

Go to https://support.btcprivate.org
submitted by BitcoinPrivate to BTC_Private [link] [comments]

Interesting technical facts about Groestlcoin that might explain price rise

Disclaimer: After doing some research, I own a small amount of Groestlcoin and no Vertcoin (I rkn VTC is overvalued currently). Might buy some VTC after it corrects. Here's why...
Original text: Posted by posted [–]jackielove4u 4 days ago https://www.reddit.com/groestlcoin/comments/78258z/is_grs_possibly_threatened_by_bitcoin_gold/dormg88/
Our selling points are:
submitted by enozym111 to CryptoCurrency [link] [comments]

This is what I've been working on for the past few months: A Bitcoin POS Terminal from scratch

Hey /Bircoin!
Over the past few months, I've been working on a Bitcoin POS Terminal and I think it has come to a stage where it is worth sharing.
Skip to the end of the post for a gallery of photos and a demo video.
The terminal will allow any merchant to easily accept bitcoins in a store. Just hook it up to your cash register and you are ready to go. There is no need to install any additional software, not even a bitcoin client is required locally.
Other solutions out there are not as convenient to use. You have to turn your screen to the customer to let him scan a QR code or mess with printed tickets. Also integration into your existing hard and software can be tricky.
Let's get technical! The terminal communicates with your cash register using a protocol called 'Open Payment Initiative' (O.P.I.). It is TCP based, so you only need an Ethernet cable to connect the terminal to the computer running your POS software.
When a new transaction is requested, the terminal creates a QR code to tell the customers wallet where to send the bitcoins.
To watch the bitcoin network for incoming transactions, Obelisk backend servers are used. The protocol is famous for being developed and used by the Electrum bitcoin client.
The terminal also has built in NFC capabilities to allow even faster precessing. In the future it may even be possible to transmit the transaction data from the phone to the terminal via NFC. That way even offline devices can pay with bitcoins.
The terminal is completely developed from scratch. The main processor is a LPC2387 (ARM7 core, 512kB Flash, 98kB RAM). Also included are drivers for NFC and Ethernet. The Ethernet driver is capable of 100MBit transmission, although that speed is far from being needed by the terminal.
The display has a resolution of 240 by 160 pixels, enabling any device to easily read the QR codes. The prototype case is 3d printed and designed using FreeCAD, an open source CAD software.
The software running on the terminal is written in C and compiled with arm-elf-gcc. Everything is open source, and so will be the terminal software. The sources will be released as soon as they move from 'a hack' to a proper alpha version.
The software uses some libraries:
There is a gallery here and a video showing the terminal interact with posPER, a free, open source POS software.
TL;DR The Bitcoin POS Terminal enables any merchant to easily acccept bitcoins using existing hard and software. Watch the video above for a quick demo.
If you like what you just saw, all bitcoins received at 16AXtZAQ6GmTEqf9TEfYRLyxo3qtPDajnq will be exclusively used to further develop the terminal.
submitted by solanoid_ to Bitcoin [link] [comments]

Just set up an Electrum server

I was already running a full node on my server, but after using Electrum for my personal bitcoins for a while I decided to set up an Electrum server on top of it as well. Feel free to point your clients to orannis.ddns.net, default ports.
submitted by smmalis37 to Bitcoin [link] [comments]

PSA: Clearing up some misconceptions about full nodes

It's time to clear up some misconceptions floating around about full nodes.
Myth: There are only about 5500 full nodes worldwide
This number comes from this site and it measured by trying to probe every nodes on their open ports.
Problem is, not all nodes actually have open ports that can be probed. Either because they are behind firewalls or because their users have configured them to not listen for connections.
Nobody knows how many full nodes there are, since many people don't know how to forward ports behind a firewall, and bandwidth can be costly, its quite likely that the number of nodes with closed ports is at least another several thousand.
Nodes with open ports are able to upload blocks to new full nodes. In all other ways they are the same as nodes with closed ports. But because open-port-nodes can be measured and closed-port-nodes cannot, some members of the bitcoin community have been mistaken into believing that open-port-nodes are that matters.
Myth: This number of nodes matters and/or is too low.
Nodes with open ports are useful to the bitcoin network because they help bootstrap new nodes by uploading historical blocks, they are a measure of bandwidth capacity. Right now there is no shortage of bandwidth capacity, and if there was it could be easily added by renting cloud servers.
The problem is not bandwidth or connections, but trust, security and privacy. Let me explain.
Full nodes are able to check that all of bitcoin's rules are being followed. Rules like following the inflation schedule, no double spending, no spending of coins that don't belong to the holder of the private key and all the other rules required to make bitcoin work (e.g. difficulty)
Full nodes are what make bitcoin trustless. No longer do you have to trust a financial institution like a bank or paypal, you can simply run software on your own computer. To put simply, the only node that matters is the one you use
Myth: There is no incentive to run nodes, the network relies on altruism
It is very much in the individual bitcoin's users rational self interest to run a full node and use it as their wallet.
Using a full node as your wallet is the only way to know for sure that none of bitcoin's rules have been broken. Rules like no coins were spent not belonging to the owner, that no coins were spent twice, that no inflation happens outside of the schedule and that all the rules needed to make the system work are followed (e.g. difficulty.) All other kinds of wallet involve trusting a third party server.
All these checks done by full nodes also increase the security. There are many attacks possible against lightweight wallets that do not affect full node wallets.
This is not just mindless paranoia, there have been real world examples where full node users were unaffected by turmoil in the rest of the bitcoin ecosystem. The 4th July 2015 accidental chain fork effected many kinds of wallets. Here is the wiki page on this event https://en.bitcoin.it/wiki/July_2015_chain_forks#Wallet_Advice
Notice how updated node software was completely unaffected by the fork. All other wallets required either extra confirmations or checking that the third-party institution was running the correct version.
Full nodes wallets are also currently the most private way to use Bitcoin, with nobody else learning which bitcoin addresses belong to you. All other lightweight wallets leak information about which addresses are yours because they must query third-party servers. The Electrum servers will know which addresses belong to you and can link them together. Despite bloom filtering, lightweight wallets based on BitcoinJ do not provide much privacy against nodes who connected directly to the wallet or wiretappers.
For many use cases, such privacy may not be required. But an important reason to run a full node and use it as a wallet is to get the full privacy benefits.
Myth: I can just set up a node on a cloud server instance and leave it
To get the benefits of running a full node, you must use it as your wallet, preferably on hardware you control.
Most people who do this do not use a full node as their wallet. Unfortunately because Bitcoin has a similar name to Bittorrent, some people believe that upload capacity is the most important thing for a healthy network. As I've explained above: bandwidth and connections are not a problem today, trust, security and privacy are.
Myth: Running a full node is not recommended, most people should use a lightweight client
This was common advice in 2012, but since then the full node software has vastly improved in terms of user experience.
If you cannot spare the disk space to store the blockchain, you can enable pruning. In Bitcoin Core 0.12, pruning being enabled will leave the wallet enabled. Altogether this should require less than 900MB of hard disk space.
If you cannot spare the bandwidth to upload blocks to other nodes, there are number of options to reduce or eliminate the bandwidth requirement. These include limiting connections, bandwidth targetting and disabling listening. Bitcoin Core 0.12 has the new option -blocksonly, where the node will not download unconfirmed transaction and only download new blocks. This more than halves the bandwidth usage at the expense of not seeing unconfirmed transactions.
Synchronizing the blockchain for a new node has improved since 2012 too. Features like headers-first and libsecp256k1 have greatly improved the initial synchronization time.
It can be further improved by setting -dbcache=3000 which keeps more of the UTXO set in memory. It reduces the amount of time reading from disk and therefore speeds up synchronization. Tests showed that the entire blockchain can now be synchronized in less than 3 and a half hours (Note that you'll need Bitcoin Core 0.12 or later to get all these efficiency improvements) Another example with 2h 25m
How to run a full node as your wallet.
I think every moderate user of bitcoin would benefit by running a full node and using it as their wallet. There are several ways to do this.
So what are you waiting for? The benefits are many, the downsides are not that bad. The more people do this, the more robust and healthy the bitcoin ecosystem is.
Further reading: http://www.truthcoin.info/blog/measuring-decentralization/
submitted by belcher_ to Bitcoin [link] [comments]

How To Use NODL (DOJO) : Hardening NODL CHANNEL MANAGEMENT and RTL interface in Raspiblitz Wallet Ledger introduce a Web Wallet  Bonuses up to 3 000 ... How to connect your wallet to BTCPay Server Store (xpub, Electrum, Ledger Nano S) How to mine BITCOIN PRIVATE with GPU!!! SERVER CHANGED TO pool2.btcprivate.org

Electrum is a lightweight Bitcoin client, based on a client-server protocol. It was released on November 5, 2011. Main features. Encrypted wallet: the file that contains bitcoin private keys is protected with a password, and never leaves the user's computer.; Deterministic key generation: If you lose your wallet file, you can recover it from its seed.You are protected from your own mistakes. Electrum uses Electrum servers to interact with the bitcoin network. It uses them to find out which transactions are relevant to your wallet and also to broadcast spending transactions. The server you are connected to will see your addresses, transaction history and balances. It will not get access to your seed or your private keys. Server connection status orb. Servers are run by volunteers ... Wenn Sie Bitcoin bereits an einer Börse oder an einem anderen Ort aufbewahren, können Sie diese Gelder jetzt in Ihre Electrum-Wallet überweisen. In diesem Fall wird ein sehr kleiner Transfer empfohlen. Erwarten Sie Fehler beim Erlernen von Electrum, besonders wenn Sie neu bei Bitcoin sind. Es ist weitaus besser, Ihre Klumpen zu nehmen, wenn Sie sich mit dem Wechselgeld befassen, als wenn ... Electrum Personal Server (EPS) offers less performance than ElectrumX or Electrs, but is easier to set up and connect to a Bitcoin node, making it a good choice for individuals interested in installing a private Electrum server for personal use. It’s also light on resources compared to a fully-indexed ElectrumX or Electrs instance, so it can be run on low-end hardware. Electrum Personal Server aims to make using Electrum bitcoin wallet more secure and more private. It makes it easy to connect your Electrum wallet to your own full node. It is an implementation of the Electrum server protocol which fulfills the specific need of using the Electrum wallet backed by…

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How To Use NODL (DOJO) : Hardening NODL

Im showing you step by step how to set up and start mining BITCOIN PRIVATE COIN with your GPU STRATUM HOST (SERVER) CHANGED TO: pool2.btcprivate.org BITCOIN ... No need to port forward TCP8333 from now on! - Linux terminal new stuff: adduser, who, id * All other commands have been covered in previous videos - Add user to Tor group: sudo adduser USER_NAME ... The end result is a bitcoin electrum wallet connected to my own bitcoin node running over TOR. Pretty cool privacy preserving and sovereign design. It will help me with future videos as I won't ... Thanks for watching! For donations: Bitcoin - 1CpGMM8Ag8gNYL3FffusVqEBUvHyYenTP8 BTCPay Server 3,518 views 7:48 Live Tradenet Day Trading Room - 03/26/2020 - Stay Calm And Keep Learning Sale! 🏡📝 Meir Barak - Tradenet Day Trading Academy 1,270 watching