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Electrum - Simply the best thin Bitcoin client

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Downloads of Electrum, a tiny and secure Bitcoin client, surging 104% upon official v1.0 release.

Downloads of Electrum, a tiny and secure Bitcoin client, surging 104% upon official v1.0 release. submitted by svenfaw to Bitcoin [link] [comments]

Was using bitcoin-qt on OSX, blockchain got corrupted and now it is impossibly big to re-download, what thin clients can I import my wallet.dat into?? OSX 10.7.5. I already tried electrum and looks like I'd have to build it from github, can't figure it out. please help.

Send help! is there a safe way I could download a torrent of the blockchain? i tried to reindex the blockchain (after my harddrive got unplugged while bitcoin-qt was running) and it looks like it would literally take a week of spinning my poor laptop fan balls out.
edit: wallet.dat is encrypted and safely backed up.
submitted by sporabolic to Bitcoin [link] [comments]

What is advantageous in downloading whole blockchain on the hard drive as in Bitcoin QT, and why does clients like Electrum get away without it?

It seems cumbersome downloading few gigs of data just to make several transactions, but I recon it has its reasons. Isn't its potentially harmful to the network if more people used Electrum? It seems kind of like leeching in the Torrent network.
submitted by markovcd to BitcoinBeginners [link] [comments]

There are many wallet applications across various mobile and desktop operating systems, here are some recommendations

Blue wallet – A custodial or non-custodial wallet (depending on configuration) with On-chain and Lightning payment capability. Users also have the ability to purchase Bitcoin directly on the wallet through P2P exchange HodlHodl. (Google Play/App Store/Mac)
Wallet Of Satoshi – A custodial wallet that supports Lightning payments. (Available Google Play/App Store)
Breez Wallet – An open-source non-custodial wallet with easy Lightning network channel set-up. (Google Play/App Store)
Electrum Wallet – An open-source non-custodial wallet on Desktop and mobile with easy Lightning network channel set-up. (Google Play/Linux/PC/MacOS/Python)

Source
submitted by parakite to lightningnetwork [link] [comments]

What I currently use for privacy

So this is what software I currently use for privacy, would like some opinions if possible:
Starting with my cellphone, my device is a Google Pixel 3A XL with GrapheneOS flashed, I have the following apps installed:
F-Droid and AuroraOSS (as my app stores), NewPipe (youtube client), Vanadium (web browser), Tutanota and K-9 Mail (for e-mails), OsmAnd+ (for maps), Joplin (notes), Open Camera (camera), OpenBoard and Mozc for Android (Keyboard and Japanese Keyboard), Aegis Authenticator, KeePassDX (password manager), LibreTorrent (torrent client), Librera PRO (pdf/epub/mobi reader, I don't own a Kindle nor want to own one so I use my cellphone to read), Tachiyomi (manga reader), Signal (for messaging), Vinyl Music Player, VLC, Simple Gallery Pro and Simple Calendar Pro (I prefer them over stock Graphene options) and I also use Electrum and Samourai (Bitcoin Wallet) and Monerujo (Monero Wallet)
I also have OpenVPN (for VPN) and use a private DNS for ad and tracking blocking (provided by my VPN provider)
I have 3-4 PCs, will go over every single one of them:
my main PC is a desktop PC (that I built myself) that I mainly use for working and other tasks.
It runs Artix Linux (basically Arch Linux without systemd), I use UFW as my firewall (denying all incoming and also denying all outgoing only allowing what is useful) and I also use AppArmor Profiles, I disabled IPV6 and SWAP, configured my VPN connection as well on network settings and I currently run OpenVPN on my computer (my VPN provider allows for multi-hop cascade through OpenVPN in which I can create a custom VPN cascade up to four servers, each consecutive hop re-encrypts my traffic and assigns me a new IP address) and I've also set disk encryption on installation (have set in all of my computers)
As for software: I use Mozilla Firefox as my web browser (I set it to always be in private mode, unchecked suggestions for browsing history, bookmarks, and open tabs, I've also disabled the Firefox data collection in settings and block dangerous and deceptive content, I use DuckDuckGo as my search engine, I use Firefox Home as my default as my homepage. The rest of my tweaks were done in about:config (using privacytools.io site tweaks + geo.enabled = false, network.cookie.lifetimePolicy = 2 and dom.security.https_only_mode as true which are not listed on the site) and the only addons I use are uBlock Origin on Hard Mode and Decentraleyes), KeePassXC (password manager), VIM (use it as a Text Editor and as an IDE for coding), LibreOffice (for working stuff), GIMP (image editor), VLC, qBitTorrent and Tutanota's Desktop Client and Thunderbird (for e-mails)
I also use KVM/QEMU for virtual machines (usually in case I wanna test some distro or use Tails/Whonix)
For my gaming PC (also a desktop I've built myself) I run Manjaro KDE on it, the only apps I have in the system are Firefox (same settings as above), OBS and KVM/QEMU (which I use a Win10 virtual machine for games, there are tutorials on YouTube on how to do so if you're interested). I have the same firewall settings as above, using AppArmor as well and I've also disabled IPV6 and SWAP, I run OpenVPN on it as well as my VPN DNS settings on network settings. I also use different mouse and keyboard on both my PCs and never mix them together.
My other 2 PCs are both laptops, one is a Acer Aspire Nitro I've bought for work (in case I need to work while in a trip or if I wanna work outside etc), it has the same settings and programs as my main PC but I run Gentoo on it. The other laptop is an old ThinkPad that runs Slackware on it, but I rarely use it and this laptop is most of the times not with me for safety reasons.
For some other devices and stuff: I have an Asus RT-AC86U router with OpenWRT flashed on it that I also run OpenVPN config files (this one coming from another provider, I use two VPN providers, on in my PCs and the other in my router), I have a Ledger Nano S as a hardware wallet for both Bitcoin and Monero (most of my cryptocurrency is there, I use hardware wallet for hodling purposes and as my emergency funding) and I have LOTS of USB flash drivers (all of them for Linux Live ISOs purposes), I also have a Nintendo Switch Lite (only gaming console I have, although have not been playing that much on it recently) that I only connect to the internet in case I need to download some updates or play online and after I'm done I immediately disconnect it from the internet.
Some other privacy habits I have are:
I don't own any smart device like Smart TVs (I've been more than 10 years now without watching TV, doesn't even bother me), Smart Fridges or Dishwashers that connect to your internet, ROOMBAS, Smart Home etc, I keep all my money on crypto (and I have a small amount in gold as well, but I rarely invest on it, all my gold is stored in a manual safe here in my apartment) and I only have like, 10 bucks or so in my back account (as soon as I receive any money I just left the necessary in my account to pay bills and put all the rest on crypto, I try to pay everything on crypto or cash), I RARELY use cloud storage, but if I need to, I go with NextCloud and encrypt all my files with VeraCrypt before uploading it, all my VPN services were paid with Bitcoin (I try to pay everything with crypto as previously said) and I never write directly into any website, I usually write my text on a text editor, copy it and paste it on the website (needless to say that I don't use mainstream social media as well)
So, what do you guys think? anything that you would add your recommend me? (before anyone mentions about self-hosting a DNS server using Pi-hole on a Raspberry Pi, I'm actually thinking on doing it in a near future)
EDIT: forgot to mention that I don't watch YouTube on PC on youtube site, I mostly watch youtube's videos on invidio.us and only use the youtube site for watching live streams honestly. And I also barely go outside with my smartphone (only if I really need to) and I usually keep it away from my computers etc.
EDIT 2: also another thing: I covered all my laptop's webcams with black electrical tape, I have a Logitech C922 Pro webcam for my desktop PCs but rarely use it, and when I need to use it, I unplug it as soon as I'm done with it.
submitted by SlackAcademic to privacytoolsIO [link] [comments]

Electrum Targeted Phishing & Malware Warning

Electrum Targeted Phishing & Malware Warning submitted by at_echeveria to Bitcoin [link] [comments]

Electrum wont connect to mynode

having some issues with Electrum wallet on Ubuntu 20.04 LTS. i got it to install properly with no issues. but it seems like i am now have trouble connecting it to my node, below is what my .desktop file looks like
# If you want Electrum to appear in a Linux app launcher ("start menu"), install this by doing:
# sudo desktop-file-install electrum.desktop

[Desktop Entry]
Comment=Lightweight Bitcoin Client
Exec=sh -c "PATH=\"\\$HOME/.local/bin:\\$PATH\"; electrum --oneserver --server localhost:50001:t %u"
GenericName[en_US]=Bitcoin Wallet
GenericName=Bitcoin Wallet
Icon=electrum
Name[en_US]=Electrum Bitcoin Wallet
Name=Electrum Bitcoin Wallet
Categories=Finance;Network;
StartupNotify=true
StartupWMClass=electrum
Terminal=false
Type=Application
MimeType=x-scheme-handlebitcoin;
Actions=Testnet;

[Desktop Action Testnet]
Exec=sh -c "PATH=\"\\$HOME/.local/bin:\\$PATH\"; electrum --testnet %u"
Name=Testnet mode


when opening up the wallet, i get the red dot on the bottom right hand corner, i can ping and access mynode via the local 192. address and i see electrum server is running. does it matter where the electrum.desktop file is located? as of right now i have it under /home/gp11/Downloads. is there anything else i can check? even if i remove electrum --oneserver --server localhost:50001:t i still get the same result with no connection, where i am thinking if i remove the line of code it should connect to other nodes.
currently using myNode community Version 0.2.09 any help here would be appreciated - thanks in advance.
submitted by lifeofgp to Electrum [link] [comments]

Electrum forces users to upgrade clients to prevent phishing messages

Electrum forces users to upgrade clients to prevent phishing messages submitted by Rattlesnake_Mullet to Bitcoin [link] [comments]

What the actual fuck????

Long story short, i am trying to make a purchase on a website that does not accept credit cards from commonwealth countries (canada, NZ, australia, etc.)
SO, i decided it was time to make a bitcoin wallet, which i have been meaning to do for at least a year, but never had the immediate need to.
So, i download a wallet client (Electrum), set up an account, go to purchase some bitcoin to get started, and make my purchase.
I upload my personal information, along with my FUCKING PASSPORT, which i dont mind, but what i do mind is the next step after giving them my passport:
"Camera settings disabled. Enable your camera"
Well, i dont own a fucking camera. I have no cellphone.
I had to contact a relative to go over to their house, with my passport, just so they could take a photograph of it and email it to me.
Now. I guess i need a webcam, or a goddamn iphone, because they now have ALL my personal information and i still cant make an account. I cant afford a fucking phone, let alone the extortionist bills from cell service companies.
What the fuck am i supposed to do, Reddit? I am stuck 2/3 of the way through adding my (laughably meager, im poorer than faggot dirt) funds to my newly created wallet. But, i cant just back out because they have ALL of my personal info (my passport etc.).
Any way i can get funds in to my account without saving up for months for a webcam/cellphone? I am so fucking frustrated right now its unbearable.
P.S. Sorry for swearing. Please help me ASAP.
submitted by jmdopefiend to Bitcoin [link] [comments]

Recovering persistent storage from unbootable Tails?

I posted a few hour ago explaining an issue I was having booting my Tails.
I was able to download and run Tails on a different USB. Is there a way for me to transfer my persistent storage from my old Tails to my newly-installed one? The instructions for backing up persistent storage on the Tails website involves booting up my old Tails, which I cannot do.
EDIT: Figured it out with the help of Liquid_Hate_Train below! Here’s what I did:
submitted by throwitawaynow23 to tails [link] [comments]

Help: I think I just had BSV stolen from me while using ElectrumSV

EDIT: NOTHING WAS STOLEN! ElectrumSV and BSV in general are perfectly fine (and have a great community). The problem is my understanding of replay protection.
The problem occurred because I had restored an old Electrum Bitcoin wallet to Electron Cash a day or two ago to transfer the funds to Coinbase to consolidate them. They were confirmed in the account, so I figured the wallet now had nothing to do with BCH any longer. Then last night, I restored the same seed to ElectrumSV and transferred some of these BSV funds to a wallet at another exchange as well as a separate local wallet.
I won't pretend that I completely understand it yet, but somehow replay protection between the two blockchains messed up the BSV transfers. The part that I still don't understand is how a confirmed BCH transaction from a day before could affect transactions on the BSV blockchain a day later. I'd love an explanation of how that works, but I'm going to be doing some heavy research on it tomorrow.
Thanks to everyone who replied and helped troubleshoot in this thread, but especially u/Deminero30 for taking almost three hours to work with me to sort this out.
Yesterday I decided to move my BSV out of an old wallet I had, so I downloaded the Windows version of the ElectrumSV wallet from https://electrumsv.io/ and imported a pre-split BCH wallet into it.
When I went to send a test amount to another address, I got an error from the client that
"Your transaction was not sent: it conflicts with one already in the server's mempool".
The error apparently relayed from the server was
"'the transaction was rejected by network rules\n\n258: txn-mempool-conflict..."
I tried sending the same transaction again, but got the same error. The transaction didn't show up in ElectrumSV, and didn't show up in a search on two block explorers.
At the time I figured it was a problem with my PC, network congestion, or too low of a fee, so I worked on it for a while and then tried again later. I upped the sats/byte to 2, and then created a new transaction spending from a different wallet. This one went through, so I figured nothing was wrong.
Then I sent a few more test transactions, a couple of which went through. Then there were two larger ones that got the same error as before. I wasn't too worried becuase I thought they would just clear from the mempool at some point.
But then I saw that the transaction from last night showed up in my wallet and on the block explorer, but it was sent to an address I'd never seen before! This is when I got more worried about what was going on.
I looked up the transaction on Blockchair, and I saw that the transaction ID showed up not just on the BSV chain, but also on the Bitcoin Cash chain with different addresses but the same amounts! This is extra strange because I had extracted all of the BCH from the wallet a while back.
Since then I saw one more of these transactions that had errored out initially get confirmed with a different address that isn't mine. The transaction ID is the same between the two chains as well. Also, I had upped the fee to 2 sats/byte, but this transaction had just 1 sat/byte. So it definitely wasn't the one I initially broadcast.
At this point I'm convinced that either ElectrumSV or one of the servers is hacked somehow. I don't understand any other way this could have happened.
I looked at https://ccoin.cash as suggested by u/deminero30 in another thread to try to double-spend the ones that aren't gone yet, but I haven't been able to figure it out yet (and no, I haven't and wouldn't upload a private key to a website; I'd do it offline).
I would really appreciate it if someone could tell me what's going on here. I really hope that I'm just making some stupid mistake, but I realize that the BSV that are gone aren't likely to come back. I also have at least one transaction that errored and hasn't been confirmed yet, so I'd love to know if there's any way to cancel what's out there in the mempool.
The first transaction is this one: [removed]
Thank you
submitted by svandgone to bitcoincashSV [link] [comments]

[How-To] Crafting an offline TXN with the trezorlib python API

With the rollout of the new 0.12.0 Trezor API, I thought it might be time to update some of my old offline_txn scripts. The following is about 80 lines of python that will craft and sign a VERY simple transaction on Testnet.
The new rollout also comes with some new tools. The build_tx.py that is useful in conjunction with the trezorctl sign_tx command.
Both of the methods below will produce a signed TXN that can then be imported into Electrum using the "Tools -> Load transaction -> From text" command.
Note: u/Crypto-Guide has a good walkthrough for installing trezorlib in Windows if you haven't already done that.

Example of using trezorctl btc sign-tx

This example uses the build_tx.py script to build JSON to feed to the sign-tx command. You will need to download the build_tx.py file from github. It is not automatically installed with the trezor package.
```

python build_tx.py | trezorctl btc sign-tx -

Coin name [Bitcoin]: Testnet Blockbook server [btc1.trezor.io]: tbtc1.trezor.io
Previous output to spend (txid:vout) []: e294c4c172c3d87991...060fad1ed31d12ff00:0 BIP-32 path to derive the key: m/84'/1'/0'/0/0 Input amount: 129999866 Sequence Number to use (RBF opt-in enabled by default) [4294967293]: Input type (address, segwit, p2shsegwit) [segwit]:
Previous output to spend (txid:vout) []:
Output address (for non-change output) []: 2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3 Amount to spend (satoshis): 129999706
Output address (for non-change output) []: BIP-32 path (for change output) []: Transaction version [2]: Transaction locktime [0]: Please confirm action on your Trezor device.
Signed Transaction: 0200000000010100ff121dd31ead0f06...f279b642d85c48798685f86200000000 ```

Example of using crafting a TXN using trezorlib directly

If your good with python, or want to see how everything works under the hood, here's 80 lines of python to generate a similar signed transaction.
```python

!/usbin/env python3

[repo] https://github.com/brianddk/reddit ... python/offline_txn.py

[req] pip3 install trezor

from trezorlib import btc, messages as proto, tools, ui from trezorlib import MINIMUM_FIRMWARE_VERSION as min_version from trezorlib.client import TrezorClient from trezorlib.transport import get_transport from trezorlib.btc import from_json from json import loads from decimal import Decimal from sys import exit

Tested with SLIP-0014 allallall seed (slip-0014.md)

User Provided Fields; These are pulled from test scripts

CHANGE THESE!!!

coin = "Testnet"

Get legacy UTXO prev_txn hex from blockbook server. For example:

https://tbtc1.trezor.io/api/tx-specific/ \

e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00

in1_prev_txn_s = '{"txid":' \ '"e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00"}'
in1_prev_index = 0 in1_addr_path = "m/84'/1'/0'/0/0" # allallall seed in1_amount = 129999867 out1_address = "2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3" out1_amount = in1_amount - 192

Defaults

tx_version = 2 tx_locktime = 0 sequence = 4294967293

Code

in1_prev_txn_j = loads(in1_prev_txn_s, parse_float=Decimal) in1_prev_hash = in1_prev_txn_j['txid'] in1_prev_hash_b = bytes.fromhex(in1_prev_hash) device = get_transport() client = TrezorClient(transport=device, ui=ui.ClickUI())
fw_version = (client.features.major_version, client.features.minor_version, client.features.patch_version) if fw_version < min_version[client.features.model]: print("Please flash to the latest FW") exit(1)
signtx = proto.SignTx( version = tx_version, lock_time = tx_locktime )
ins = [proto.TxInputType( address_n=tools.parse_path(in1_addr_path), prev_hash=in1_prev_hash_b, prev_index=in1_prev_index, amount=in1_amount, script_type=proto.InputScriptType.SPENDWITNESS, sequence=sequence )] outs = [proto.TxOutputType( address=out1_address, amount=out1_amount, script_type=proto.OutputScriptType.PAYTOADDRESS )]
txes = None for i in ins: if i.script_type == proto.InputScriptType.SPENDADDRESS: tx = from_json(in1_prev_txn_j) txes = {in1_prev_hash_b: tx} break
_, serialized_tx = btc.sign_tx(client, coin, ins, outs, details=signtx, prev_txes=txes) client.close() print(f'{{"hex": "{serialized_tx.hex()}"}}') ```
From here, you simple take the resultant TXN hex and import it into Electrum using the "Tools -> Load transaction -> From text" clickpath
submitted by brianddk to Bitcoin [link] [comments]

[How-To] Crafting an offline TXN with the trezorlib python API

With the rollout of the new 0.12.0 API, I thought it might be time to update some of my old offline_txn scripts. The following is about 80 lines of python that will craft and sign a VERY simple transaction on Testnet.
The new rollout also comes with some new tools. The build_tx.py that is useful in conjunction with the trezorctl sign_tx command.
Both of the methods below will produce a signed TXN that can then be imported into Electrum using the "Tools -> Load transaction -> From text" command.
Note: u/Crypto-Guide has a good walkthrough for installing trezorlib in Windows if you haven't already done that.

Example of using trezorctl btc sign-tx

This example uses the build_tx.py script to build JSON to feed to the sign-tx command. You will need to download the build_tx.py file from github. It is not automatically installed with the trezor package.
```

python build_tx.py | trezorctl btc sign-tx -

Coin name [Bitcoin]: Testnet Blockbook server [btc1.trezor.io]: tbtc1.trezor.io
Previous output to spend (txid:vout) []: e294c4c172c3d87991...060fad1ed31d12ff00:0 BIP-32 path to derive the key: m/84'/1'/0'/0/0 Input amount: 129999866 Sequence Number to use (RBF opt-in enabled by default) [4294967293]: Input type (address, segwit, p2shsegwit) [segwit]:
Previous output to spend (txid:vout) []:
Output address (for non-change output) []: 2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3 Amount to spend (satoshis): 129999706
Output address (for non-change output) []: BIP-32 path (for change output) []: Transaction version [2]: Transaction locktime [0]: Please confirm action on your Trezor device.
Signed Transaction: 0200000000010100ff121dd31ead0f06...f279b642d85c48798685f86200000000 ```

Example of using crafting a TXN using trezorlib directly

If your good with python, or want to see how everything works under the hood, here's 80 lines of python to generate a similar signed transaction.
```python

!/usbin/env python3

[repo] https://github.com/brianddk/reddit ... python/offline_txn.py

[req] pip3 install trezor

from trezorlib import btc, messages as proto, tools, ui from trezorlib import MINIMUM_FIRMWARE_VERSION as min_version from trezorlib.client import TrezorClient from trezorlib.transport import get_transport from trezorlib.btc import from_json from json import loads from decimal import Decimal from sys import exit

Tested with SLIP-0014 allallall seed (slip-0014.md)

User Provided Fields; These are pulled from test scripts

CHANGE THESE!!!

coin = "Testnet"

Get legacy UTXO prev_txn hex from blockbook server. For example:

https://tbtc1.trezor.io/api/tx-specific/ \

e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00

in1_prev_txn_s = '{"txid":' \ '"e294c4c172c3d87991b0369e45d6af8584be92914d01e3060fad1ed31d12ff00"}'
in1_prev_index = 0 in1_addr_path = "m/84'/1'/0'/0/0" # allallall seed in1_amount = 129999867 out1_address = "2MsiAgG5LVDmnmJUPnYaCeQnARWGbGSVnr3" out1_amount = in1_amount - 192

Defaults

tx_version = 2 tx_locktime = 0 sequence = 4294967293

Code

in1_prev_txn_j = loads(in1_prev_txn_s, parse_float=Decimal) in1_prev_hash = in1_prev_txn_j['txid'] in1_prev_hash_b = bytes.fromhex(in1_prev_hash) device = get_transport() client = TrezorClient(transport=device, ui=ui.ClickUI())
fw_version = (client.features.major_version, client.features.minor_version, client.features.patch_version) if fw_version < min_version[client.features.model]: print("Please flash to the latest FW") exit(1)
signtx = proto.SignTx( version = tx_version, lock_time = tx_locktime )
ins = [proto.TxInputType( address_n=tools.parse_path(in1_addr_path), prev_hash=in1_prev_hash_b, prev_index=in1_prev_index, amount=in1_amount, script_type=proto.InputScriptType.SPENDWITNESS, sequence=sequence )] outs = [proto.TxOutputType( address=out1_address, amount=out1_amount, script_type=proto.OutputScriptType.PAYTOADDRESS )]
txes = None for i in ins: if i.script_type == proto.InputScriptType.SPENDADDRESS: tx = from_json(in1_prev_txn_j) txes = {in1_prev_hash_b: tx} break
_, serialized_tx = btc.sign_tx(client, coin, ins, outs, details=signtx, prev_txes=txes) client.close() print(f'{{"hex": "{serialized_tx.hex()}"}}') ```
From here, you simple take the resultant TXN hex and import it into Electrum using the "Tools -> Load transaction -> From text" clickpath
submitted by brianddk to TREZOR [link] [comments]

Groestlcoin 6th Anniversary Release

Introduction

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?

Windows
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.
OSX
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.
Ubuntu
http://groestlcoin.org/forum/index.php?topic=441.0

Other Linux

http://groestlcoin.org/forum/index.php?topic=97.0

Download

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

Source

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.

Features

Download

iOS
Android

Source

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.

Features

Download

Main Release (Main Net)
Testnet Release

Source

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.

Features

Live Version (Not Recommended)

https://www.groestlcoin.org/recovery/

Download

https://github.com/Groestlcoin/mnemonic-recovery/archive/master.zip

Source

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).

Features

Usage

https://github.com/Groestlcoin/VanitySearch#usage

Download

Source

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).

Features

Download

Source

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.

Features

Remastered Improvements

Download

Source

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.

Features

Download

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

Source

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.

Features

Download

Windows
Linux / OSX (Instructions)

Source

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.

Changes

Download

Main Net
Main Net (FDroid)
Test Net

Source

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.

Changes

Download

Source

UPDATED – P2Pool Test Net

Changes

Download

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

Source

submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

BCC clients are listed HERE!

Bitcoin Cash website: https://www.bitcoincash.org

Bitcoin ABC: https://www.bitcoinabc.org
Electron Cash: http://www.electroncash.org
Bitcoin Classic: https://bitcoinclassic.com/downloads/index.html
Bitcoin XT: https://bitcoinxt.software
Bitcoin Unlimited: https://www.bitcoinunlimited.info/download
submitted by uMCCCS to btc [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
The following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
For some more great introductory videos check out Andreas Antonopoulos's YouTube playlists, he is probably the best bitcoin educator out there today. Also have to give mention to James D'Angelo's Bitcoin 101 Blackboard series. Lots of additional video resources can be found at the videos wiki page or /BitcoinTV.
Key properties of bitcoin
Some excellent writing on Bitcoin's value proposition and future can be found here. Bitcoin statistics can be found here, here and here. Developer resources can be found here and here. Peer-reviewed research papers can be found here. The number of times Bitcoin was declared dead by the media can be found here. Scaling resources here, and of course the whitepaper that started it all.

Where can I buy bitcoins?

BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Coinbase Coinbase LocalBitcoins
Gemini Bitstamp LibertyX
GDAX Bitit Mycelium LocalTrader
Bitstamp Cex.io BitQuick
Kraken CoinMama WallofCoins
Xapo BitcoinOTC
Cex.io
itBit
Bitit
Bitsquare
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Cashila or Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Mycelium BreadWallet Electrum
CoPay AirBitz Armory
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

A more comprehensive list can be found at the Trade FAQ but some more commons ones are below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, The Bitcoin Shop, Overstock, DuoSearch, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Cashila, Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, Pey.de, LivingRoomofSatoshi, Hyphen.to, Coinsfer, GetPaidinBitcoin, Coins.co.th, More #1, #2 Bill payment
Foodler, Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BoltVM, BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik and GetUSPS Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap, 99Bitcoins and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, Red Cross, Amnesty International, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Watchmybit, Streamium.io, OTika.tv, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip, WillPayCoin Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mirror Smart contracts
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bitsquare Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Bitmesh and Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium and Faradam Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
Coinometrics Institutional-level Bitcoin Data & Research
Blocktrail and BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $500 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BinaryResult to Bitcoin [link] [comments]

If you use Electrum, in case you get a error message that tells you to update please ignore (ongoing phishing attack).

Details here: https://github.com/spesmilo/electrum/issues/4968
copy paste from SomberNight in the github issue:
TL;DR: There is an ongoing attack against users where servers raise exceptions when a client broadcasts a transaction; in this case the error text is displayed as is in the client GUI. The attacker has spawned lots of servers on different /16 IPv4s to increase his chances of being connected to. The error messages are trying to get the user to download and install malware (disguised as updated versions of electrum).` 
apparently previous Electrum versions allow richtext in error messages sent by the server, so the upgrade warning might look legit to people...
Always remember to verify pgp / gpg signatures of bitcoin software you install.
submitted by fmlnoidea420 to Bitcoin [link] [comments]

Best practices for running full nodes

Hi,
I atarted running my own bitcoin full node a few weeks back. Any best practices around running full nodes that you believe aren't discussed enough?
Also, anybody running full nodes with alternative implementations of the bitcoin client (e.g. bcoin, bitcore) instead of bitcoind? Why? How has your experience been?
submitted by marionzualo to BitcoinBeginners [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
Some great introductions for new users are My first bitcoin, Bitcoin explained and ELI5 Bitcoin. Also, the following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
Also have to give mention to Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series. Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute. Bitcoin statistics can be found here, here and here. Developer resources can be found here, here and here. Peer-reviewed research papers can be found here. Potential upcoming protocol improvements here. Scaling resources here. The number of times Bitcoin was declared dead by the media can be found here (LOL!), and of course Satoshi Nakamoto's whitepaper that started it all! :)
Key properties of bitcoin

Where can I buy bitcoins?

Bitcoin.org, BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Gemini Bitstamp LocalBitcoins
Bitstamp Bitit Mycelium LocalTrader
BitFinex Cex.io LibertyX
Cex.io CoinMama WallofCoins
Xapo Spectrocoin BitcoinOTC
Kraken Luno BitQuick
itBit
HitBTC
Bitit
Bisq (decentralized)
Luno
Spectrocoin
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Samouari BreadWallet Electrum
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for some good options, some of the more commons ones are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, Overstock, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Hyphen.to, Coinsfer, More #1, #2 Bill payment
Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Streamium.io, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream, Rootstock and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BinaryResult to Bitcoin [link] [comments]

My Electrum wallet suddenly shows 0 BTC!

Description of Problem: I transferred bitcoin to my wallet about 2 weeks ago and confirmed that the amounts did arrive into the account. A few days later, I signed into my account and realized that my balance was showing 0 BTC. I have no idea where the BTC went. I checked the history and it seems to show that the amount was transferred out but I definitely don't remember doing that. How do I get my BTC back?! Any help is sincerely appreciated!
PS: I did verify my download.

Bitcoin Client Software and Version Number: Electrum 3.3.4 Operating System: Windows 10 Enterprise (Version 1903) System Hardware Specs: Intel Core i7-7700K CPU 4.20 Ghz, 16 GB DRAM4, 64 bit Any Related Addresses: Any Related Transaction IDs: Screenshot of the problem: https://ibb.co/dQrqpK1
submitted by Majormuss to Bitcoin [link] [comments]

A tutorial for Tails linux, to stay safe on Internet.

I'm not so sure this will be a help or not, quite sure that official guide is more reliable than this. anyway that's what I have here. If this article contains any kinds of misleading or error, please let me know in the comments.
A tutorial for tails linux, to stay safe on the Internet.
In today's circumstances, it's good to put more effort on maintain a low profile on Internet, or atleast learn how to do that.
If you already have a computer at home, you need to consider to use Tails linux if safety is what your concern about.
Access to https://tails.boum.org/ then follow download instructions.
The idea of tails is, it will anonymize your entire connection on Internet by using Tor network. So no one will discover your identity without lots of effort.
Not only that, once you do shutdown your device, it no longer holds any information. That means, other one can't find any evidence from your device.
Also if you still want to storage some text on tails, The easiest way is hide that in online email account.
At first, open text editor that preinstalled in tails. https://www.reddit.com/tails/comments/bm65w7/tails_faq_what_happened_to_the_pgp_clipboard_in/?utm_medium=android_app&utm_source=share
Then, follow the instruction to encrypt your text by passwords and paste it on email account through tor browser. Do not use that account to communicate to others, just keep it in secret. https://tails.boum.org/doc/encryption_and_privacy/gpgapplet/passphrase_encryption/index.en.html
If you are about to send messages through email, this instruction could be handy. https://tails.boum.org/doc/encryption_and_privacy/gpgapplet/public-key_cryptography/index.en.html You needs to learn about PGP first, tho.use XMPP is the either easier or safer plan.
You can encrypt other type of files by using Archive manager(give a right click on the file), but the computer gets freeze by that occasionally.
I strongly recommend to use Veracrypt hidden volume instead of build a Persistent storage feature, or LUCKS encrypted drive for linux that available on tails for both send/storage purposes.
In that way, you'll get two of passwords for one encrypted storage. If you are forced to reveal your password by others, you have a option to reveal a fake one.
On top of that, if you use another USB for that purpose, you don't have to slow down Tails itself. Persistent storage is tends to be fragile, I occasionally toast an entire data during excessive use. https://www.veracrypt.fen/Hidden%20Volume.html https://tails.boum.org/doc/encryption_and_privacy/veracrypt/index.en.html
You need to use other OSs for create new volumes. Linux is safer than windows I guess, but it takes an effort.
IIRC, you should check "I use hidden volume" radio button during type the password. Otherwise your hidden password doesn't simply work. Don't get confused by that.
Not only that, Tails has the Mac address spoofing function by default. Mac address is the unique identifier for your device. https://en.m.wikipedia.org/wiki/MAC_address
That function also increases anonymity on Internet. it's important when you go outside because even if you killed GPS function on your devices, it still leave a Mac address on wifi router or 3G/LTE cellular module nearby. So someone still can trace your location.
Also just in case if your government decides to not allow you to connect tor network, you should read this article first. https://tails.boum.org/doc/first_steps/startup_options/bridge_mode/index.en.html
But if every each of instruction seems failed to helps you, bring your device(with Mac address spoofing function) outside and connect to the Free wifi. https://freetoursbyfoot.com/where-find-free-wifi-london/
It's relatively safe since either of wifi or device doesn't leave the information that directly leads to you, but be aware on surveillance camera nearby. don't stay there too long, or use one spot too frequently.
I know laptops is too cumbersome to carry around, you have a option to choose something like a windows tablet, a stick pc along with touch screen or a Tv box. not sure on which kind of stuff do the best job unfortunately.
For communication, you need to build the safest/robust assembly point on Internet. The very best option available is XMPP Pidgin chat client.
It's pre-installed in the tails. https://tails.boum.org/doc/anonymous_internet/pidgin/index.en.html As you expected, you can start a group chat. https://superuser.com/questions/1440212/is-there-any-way-to-create-a-group-in-pidgin-like-in-whatsapp
There is couple things you can't do on Tor network or tails Linux.
First, you should read these articles. https://www.hongkiat.com/blog/do-donts-tor-network/amp/ https://tails.boum.org/doc/about/warning/index.en.html https://2019.www.torproject.org/docs/faq.html.en
Since tails is lots more robust than Tor browser bundle on windows, you can ignore the most of issues in Tor browser. Still you have to aware the risk on this.
Not only that, couple of things is getting harder to achieve through Tor.
At first, some website like Twitter, Reddit or YouTube tends to reject to create an account. If that was just a couple of exit nodes, maybe restart the browser might do the trick. https://tor.stackexchange.com/questions/19536/cant-use-reddit-on-tor-what-do-i-do
But if entire exit nodes are rejected by provider, Web based proxy gives you a chance. If that doesn't work, I'd say you should find someone who will to post your messages on viral media.
Secondly, even if you using tails, thats not means you can pay for something anonymously.
If you need to use paid Web base proxy or whatever you want, it's also safer to use anonymous cryptocurrency such as Zcash or monero. not sure how safe are they, pre-installed wallet(Electrum) only supports bitcoin. so you need to use web based wallets.
Or if someone donated a bitcoins to your anonymous wallet, it's safe to use that one through Tor.
submitted by dozenspileofash to HongKong [link] [comments]

Bitcoin integration - When or why to use the Electrum API instead of bitcoind?

I'm new to Bitcoin development! I need to programmatically receive and sent coins.
I'm aware of the command line/RPC capabilities of the default bitcoind client but I recently discovered that Electrum also provides command line capabilities allowing you to do a lot of things!
If I understand it right, using Electrum you don't have to download the blockchain locally, where this is required for bitcoind to work properly (a pruned version of the chain or not).
I'm curious to know when do people use Electrum to interact with the Blockchain instead of the default client? What are the benefits/drawbacks?
submitted by electrotype to Bitcoin [link] [comments]

How To Install A Bitcoin Wallet -- Electrum Wallet How to Set up 2-factor Authentication in Electrum Bitcoin ... How to Setup a Bitcoin Wallet with Electrum 2020 [Electrum ... How to Upgrade the Electrum Bitcoin Wallet to Version 3 HEX Crypto - Installing Electrum Bitcoin Wallet for FreeClaim / Signing BTC Address

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. 9/10 - Download Electrum kostenlos. Electrum ist die leichteste und sicherste virtuelle Bitcoin Wallet. Downloaden Sie jetzt Electrum kostenlos als großartige Alternative zu Bitcoin-Qt. Der Nachteil von manchen Bitcoin-Clients ist, dass sei das Download der kompletten Blockkette des... Electrum - Bitcoin Wallet 4.0.2 Englisch: Mit dem kostelosen Tool Electrum erhalten Sie eine Bitcoin Wallet für den PC. Electrum Bitcoin Wallet. 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. Electrum; Bitcoin thin client. Contribute to eveybcd/electrum development by creating an account on GitHub.

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How To Install A Bitcoin Wallet -- Electrum Wallet

Click to download Electrum wallet last version https://cutt.ly/igtn8s3 About Electrum Electrum was created by Thomas Voegtlin in November 2011. Since then, ... The Crypto Dad shows you how to upgrade the Electrum Bitcoin wallet from version 2.9.3 to version 3.0.1. I walk you through download and verification and then I show you how to open up you ... With the recent rise of cryptocurrency, now is the time to create a Bitcoin wallet. Electrum is a simple and secure way to create one, and I'll demonstrate how in this tutorial. Download Electrum ... The CryptoDad walks you through the basic steps of enabling 2-factor authentication for the Electrum Bitcoin Wallet. Electrum bitcoin wallet: https://electru... Pour passer de multibit à electrum : 3:59 🔗 LIENS UTILES L'article https://cryptogains.fr/1663-creez-portefeuille-bitcoin-electrum Site...

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