Bitcoin Wallets were Letting People Get Scammed with ...

I try send $10 in bitcoin to coinbase, it has been unconfirmed for weeks, no balance shows up in my electrum wallet- is it gone forever?

Rip
submitted by RoboticDogeCat to Electrum [link] [comments]

MultiBit Wallet showing balance as unconfirmed /r/Bitcoin

MultiBit Wallet showing balance as unconfirmed /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Unconfirmed transaction from 0 balance wallet /r/Bitcoin

Unconfirmed transaction from 0 balance wallet /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Multibit Wallet showing entire balance as unconfirmed /r/Bitcoin

Multibit Wallet showing entire balance as unconfirmed /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Entire wallet balance unconfirmed due to low fees! Can I resolve? /r/Bitcoin

Entire wallet balance unconfirmed due to low fees! Can I resolve? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

02-06 18:12 - 'Check the answer from "tobixen", you find it in the link above I sent you. Use maybe a different wallet or whatever you want, respend the unconfirmed balance with a higher fee (to yourself, so you can see) and then you can s...' by /u/JebusMaximus removed from /r/Bitcoin within 2-7min

'''
Check the answer from "tobixen", you find it in the link above I sent you. Use maybe a different wallet or whatever you want, respend the unconfirmed balance with a higher fee (to yourself, so you can see) and then you can send it out to the service's website wallet again, with a higher fee too. Try Bitcoin Core with this. Or Electrum. Make sure to have the option enabled to have coin control / spend unconfirmed change or whatever it offers regarding these two. For doublespending it (so that the tx with the higher fee finally get`s accepted and the old one dropped) you would need to have your privatekey(s) ready and a safe computer to handle the privatekey. Not all wallet files are fully compatible to other clients.
'''
Context Link
Go1dfish undelete link
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Author: JebusMaximus
submitted by removalbot to removalbot [link] [comments]

Ledger Live adds Coin control: Here's why that matters.

Ledger Live adds Coin control: Here's why that matters.
Ledger Live version 2.11.1 (download link) adds Coin control for power users.
The coin control feature gives advanced users more granular control over their wallets. It enables them to change how and which coins are selected when making transactions. This increases their ability to manage their privacy and the network fees they will have to pay to spend their account balance.
More control over your coins

How does it work?

The account balance for Bitcoin and its derivatives consists of all the unspent transaction outputs (UTXOs) in the account. You can think of UTXOs as the coins in a regular wallet. When you receive money, you collect coins in your wallet. Then, when you want to make a payment, you get to choose which coins you pick from your wallet. Do you pick the largest coins first? Or do you want to spend all the smaller value coins to lighten up your wallet? Similar considerations can be made when creating a Bitcoin or Bitcoin derivative (altcoin) transaction.
Before the Coin Control feature was released, all transactions involving Bitcoin (and altcoins) automatically selected their coins using the First-In-First-Out (FIFO) algorithm. This strategy includes the oldest coin in the account, and when the amount is not sufficient the second-oldest coin is added, and so forth.
As of Ledger Live version 2.11.1, users are able to make use of a dedicated Coin Control tool to choose the coin selection strategy and the coins that may be spent.

Using Coin control in Ledger Live

Coin control is available in Advanced options in the Send flow
  1. Click on Send, choose an account to debit, and enter a recipient address. Click on Continue.
  2. Enter an amount and click on Advanced options. You will then see: - The currently selected, default coin selection strategy: Oldest coins first (FIFO). - A toggle to enable Replace-By-Fee (RBF). - A toggle to include coins from unconfirmed, replaceable transactions.
  3. Click on Coin control. The coin control modal opens.
  4. Select a Coin selection strategy from the dropdown menu: - Oldest coins first (FIFO). This is the default strategy that spends the oldest coins first. - Minimize fees (optimize size). This strategy tries to minimize the byte size of the transaction by spending the lowest number of UTXOs. This results in a low network fee. - Minimize future fees (merge coins), This strategy includes the maximum number of inputs so that a potential future price rise does not make smaller UTXOs economically unspendable. If the price of a crypto asset increases too much, small UTXOs may become worth less than the cost of the network fees to spend them.
  5. Select which coins may not be included in the selection by unticking their checkbox. The SELECTED indicator shows which coins will be included in the transaction. By changing the selection strategy and/or coins to include, the user has precise control over which coins end up being spent. The Coins to spend and Change to return indicators show how much is spent from and returned to the account.
  6. Click on Done to return to the Send flow to verify and send the transaction.
The coin control window lets you select the strategy as well as pick the coins. Coins marked SELECTED will be included in the transaction.

Coin status

The following statuses can be displayed for a coin:
  • Coins received in a transaction with 0 confirmations without RBF enabled: PENDING
  • Coins received in a transaction with 0 confirmations with RBF enabled: REPLACEABLE
  • Coins received in a transaction with 1337 confirmations: 1337 CONFIRMATIONS
By enabling the toggle Include coins from unconfirmed, replaceable transactions, replaceable transactions can be selected in the Coin control screen.

The Privacy use case

One of the main use cases for Coin control is to protect one’s privacy. UTXOs are, unfortunately, not perfectly fungible due to their unique history on the blockchain. Therefore, users may want to spend coins from different sources without mixing them together, because this would indicate to an outside observer of the blockchain that these addresses belong to the same account. For instance, if one were to spend coins bought on a KYC exchange, which are associated with the user’s identity, together with coins bought anonymously using cash, the anonymous coins could be linked to the user’s identity.
Another example would be that you would like to prevent spending a high-value coin for smaller purchases because this would unnecessarily show the person you’re paying how much you have. This is similar to not showing the boulanger how much is on your bank account when buying a baguette.

Let us know what you think!

We are excited to release this new feature because we think it will fulfill real needs of an important part of our users. This version of Ledger Live marks an important milestone, but we will continue working on more features that our community wants.
So, we invite you to try out Coin control in Ledger Live and let us know what you think! All feedback is welcome on this thread, on ledgerwallet, and you can send suggestions or get help through our official contact form.
We'd like to close out by underlining our commitment to the Bitcoin community, and our willingness to build the best wallet ecosystem for newbies as well as for power users.
submitted by fabnormal to Bitcoin [link] [comments]

Possibly scammed, need any technical advice please! :)

Hi bitcoin!Situation:
I am a professional poker player and ventured deep into the abyss of shady/dodgy sites. Why I did so is still a mystery to me. Long story short, I finally made two withdrawals totaling approximately $3,500 to $4,000 via BTC. Next day, I load up my Ledger and see I have my balance. Awesome!
Oh wait...it's not spendable.Surely it just hasn't confirmed yet, right? No big deal.
Then I look at the transactions...https://blockstream.info/tx/35c1ff29f22c251b67829ce6046a7441aa81dd67d1b6b3fffb3c518fa7a19b2b
andhttps://blockstream.info/tx/e65394e7a7c8fce0eeabef3709368ad032bee7a531fed6ac002823c4ad697970
Previous withdrawals were sent to me with a more normalized fee structure.These were sent with what looks like a near-zero fee.
With my limited technical understanding of BTC, this means the transaction will either get stuck for a VERY long time, or it will never confirm and eventually be returned to him.This person has blocked me on socials and has said on the discord server for the site that "the site is better off without him"
(Basically as a good professional player he didn't want me beating his small community of players)
I'm ok with this as long as I don't get scammed.
Is there anything I can do at this point?

Edit #1: Thanks a ton to u/jcoinner for the extensive help with spending the unspent coins via CPFP (child pays for parent) The transaction appears to be confirmed!
Using CPFP has successfully spent the unconfirmed coins back to a different wallet of mine.
The txid is: 6d65c98ea01bad8d98045794729b7d1b93936a11faad0e3bd126e9223d2ee297
and appears to show a confirm and my coins are spendable.
I believe this persons' intention was
"Send a transaction that's very likely to fail and if it does I'll scam and if it doesn't...oh well."

Thank you so much reddit!

submitted by toast4breakfastSB to Bitcoin [link] [comments]

Vulnerability allows bad actors to double-spend and pickpocket users’ wallets

. . .
A startup has discovered a vulnerability present in major cryptocurrency wallets that leads to double-spend attacks and inflated balances by exploiting existing protocols.
The ‘family’ of vulnerabilities, named BigSpender, was discovered in some of the world’s most popular cryptocurrency wallets including Ledger, Bread and Edge.
Ledger told cryptocurrency magazine Decrypt that the scam was a “clever piece of trickery.”
. . .
Essentially, what they found was that BigSpender shows users incorrect bank balances. These balances incorporate unconfirmed transactions into their totals, and fail to reveal that the transaction had actually been revoked.
. . .

https://www.rt.com/news/493587-crypto-vulnerability-double-spend-pickpocket/
submitted by Mark_Bear to Bitcoin [link] [comments]

Hackers found an opportunity to steal cryptocurrency from bitcoin wallets

Hackers found an opportunity to steal cryptocurrency from bitcoin wallets
A bug in applications for storing digital assets allows criminals to replace unconfirmed transactions with their own and make users' wallets malfunctioning

https://preview.redd.it/1ycx5txr2pb51.jpg?width=280&format=pjpg&auto=webp&s=47e3f179626ef64641accaad40379435065d5249
A team of experts from ZenGo discovered a BigSpender bug in many wallets for storing cryptocurrency, such as Ledger Live, Edge, BreadWallet. The error allows hackers to steal bitcoin and other coins from users.
Some wallets have a feature that allows users to replace an outgoing, unconfirmed transaction with a new one, but with a different Commission. Due to this feature, holders could pay the miners a higher amount for the transfer of cryptocurrency, so that they could confirm the operation faster. At the same time, it has become a loophole for hackers.
To steal cryptocurrency, they must first replace the transaction with another one, but with an extremely low Commission. This will guarantee that the transfer of cryptocurrency will not receive confirmation. Then hackers replace the pending transaction with their own, leading to the wallet they control. As a result, the funds go to the criminals, but the user's app shows that the coins were allegedly delivered.
God gives hackers another opportunity. They can spam the user's address with a lot of fake transactions, so that there is a critical discrepancy between the real and displayed balance. As a result, the wallet will be impossible to use. It is clarified that the Breadwallet and Ledger Live applications have already eliminated the vulnerability.
Today, on July 13, hackers broke into the cryptocurrency wallet of the Indian crypto exchange Cashaa and withdrew 336 bitcoins worth $3.1 million from it. The company reported the incident to the cyber crime investigation Department of the Delhi police and other trading platforms.
News source
Image source
submitted by btcxlab to CryptoMarkets [link] [comments]

Warning: Ledger will not broadcast BCH transactions with a fee of less than 10 sat/byte. Ledger - that is absurd and must be fixed. I now have to go through the headache of signing the tx myself. You should have a warning or something there. The default fees for Bitcoin Cash are way too high.

submitted by God_Emperor_of_Dune to ledgerwallet [link] [comments]

Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat

Fix Issued For ‘Serious’ Bitcoin Wallet Security Threat
Bitcoin hacks and thefts have exploded since bitcoin's epic 2017 bull run saw the price balloon to around $20,000.

https://preview.redd.it/bxhlt2fdam851.jpg?width=960&format=pjpg&auto=webp&s=a3a82ec51bf8e01f57a7246977c988c2ecf53fde
The bitcoin price has fallen by more than half since its late-2017 all-time high but bitcoin users remain a popular target for hackers.
Now, researchers have warned "millions" of bitcoin users might have been exposed by a newly discovered vulnerability in a number of popular bitcoin wallets.
Bitcoin transactions across three major bitcoin wallets were vulnerable to what some might call a double-spending attack, researchers at Tel Aviv-based bitcoin and crypto company ZenGo have revealed, adding other wallets beyond the nine they tested could be compromised.
The bitcoin wallets known to be affected—Ledger Live, Edge and BRD—have been updated in an effort to prevent the attack after their developers were alerted by ZenGo.
The vulnerability, named BigSpender, allows the attacker to make the wallet holder believe a payment has been received while in fact it has been replaced by the sender. The exploit could prevent the wallet's owner from accessing its funds, though not everyone agrees on the nature of the vulnerability.
"The core issue at the heart of the BigSpender vulnerability is that vulnerable wallets are not prepared for the option that a transaction might be canceled and implicitly assume it will get confirmed eventually," ZenGo's senior software engineer, Oded Leiba, wrote in a blog post revealing the weakness.
"This negligence has many faces. First and foremost, a user’s balance is increased on an incoming transaction while unconfirmed and is not decreased if the transaction is double-spent and thus effectively canceled."
Ledger and BRD have questioned the language used by ZenGo researchers.
"There is no actual double spend being performed," the Ledger security team said via email. "The user funds stay safe. Nevertheless, the display of received transactions could be misleading."
The bitcoin wallets that were found to be susceptible to the attack are some of the most widely used—something ZenGo researchers said highlights the bug's seriousness.
"Potentially several millions of users were exposed before the fix based on the user base of Ledger and BRD public numbers," ZenGo's chief executive Ouriel Ohayon said via email. BRD recently passed the 5 million user mark, its chief technology officer told bitcoin and crypto news outlet Coindesk.
While the bitcoin wallet developers dispute the exploit's risk, Ohayon insists the threat could actually be worse than is known.
"It does not mean that there are no other issues or that other wallets are not exposed to the BigSpender attack," Ohayon said, adding other wallets ZenGo researchers tested, including its own, were not vulnerable to the attack.
"Considering that this could result in the impossibility to spend your funds and the fact that this could be done at scale, this [exploit] can be considered serious."
"Hacks are constant. Security is an on-going battle fought by the industry and one that cannot be won by a single player or a single product, let alone a version update. To allow mass adoption it is critical that wallets invest as much effort in research and security and they do in product development and services."
submitted by MIEX_Official to u/MIEX_Official [link] [comments]

04-29 13:24 - 'How do I speed up my transaction???? Ledger "seems" to not be aware of the need to include this option.' (self.Bitcoin) by /u/CaddarkCrypto removed from /r/Bitcoin within 428-438min

'''
I have a pending ether transaction, 27+ hours and counting. I am unable to use metamask because I sent through ledger live, and I guess that because it is pending, metamask is unaware of it. The only two things that recognize this transaction are ledger live and etherscan, which means it is actually within the network, and every other wallet than ledger still sees the amount that both accounts involved have the same amount that they did before I sent.
Some weird things:
  1. The sending account elsewhere shows as having never sent. This account also does show a log of the transaction as "sent" and it has a pending status.
  2. The receiving account on Ledger Live has the balance updated to what it would be once the transaction is sent, but there is no log of the transaction, neither sent or received, pending or otherwise, within the details of the account.
Ledger, I guess, doesn't ever bother to check on the efficacy of their support articles. This is already implied, given they have the thumbs up or down option that asks if the article solved the problem, but have no option available to tell them what the issue is, so even if they did check, they wouldn't have any practical feedback to fix the problem. I would imagine they put in the up or down option just to mitigate spamming their support reps with the same issue, by allowing users to feel like they've impacted the progression of improvement, but then I don't under stand why the total votes of each are shown, since right now that only serves to commemorate how incompetent they are with customer satisfaction. Their Article "Transaction Stays Unconfirmed" has 160 out of 518 voters giving a thumbs up, and that's better than average, at least for the articles from Ledger that I've read so far.
I guess they meant to use it at some point? I realize that the security of devices are where most of the company's money is probably going to, but how are they supposed to be able to properly do that when they don't give attention to feedback?!?!? How do you know what issues are critical and what aren't?
'''
How do I speed up my transaction???? Ledger "seems" to not be aware of the need to include this option.
Go1dfish undelete link
unreddit undelete link
Author: CaddarkCrypto
submitted by removalbot to removalbot [link] [comments]

Bitcoin Not showing in purse wallet

I've been in touch with purse and they are being extremely slow in sorting out my issues. Basically deposited one third of a bitcoin a few days ago which showed as an unconfirmed payment in my account, then disappeared even though the transaction was confirmed. So the bitcoins are sitting in the purse wallets to which i sent the bitcoin and now but my balance is still $0.

Purse admin have told me they have asked the developers to look into it however its been almost 72 hours now and they have not sorted it out.
Has this happened to anyone? Should i be worried? one third of a bitcoin is a lot of money for me.
submitted by begoodjohnny25 to PurseIO [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]

I have tried (almost) every mobile wallet

I have tested just about every mobile wallet on Google play now. Here is how I test it: I download the app, back it up, load some coin into it and send it back out. What have I missed? Anything you can recommend? Here is why I don't like a single app so far in no particular order : Samurai: No usd conversion No notifications
Blockchain: Lagging VPN or mobile data Very slow to load walances even on wifi
Enjin : Must type pw every time No notifications Slow to show transactions
Mycelium: Ugly No notifications
Bitcoin.com: Promotes bch No notifications
Trust: No notifications Slow updates of balance
Lumi: Insanely slow loading No notifications
Exodus: Failed me big time (would not send txs at all had to reinstall) Fixed fees (they are reasonable though)
Guarda: Gives you aids using it Can't spend unconfirmed funds Gave me 3 of each wallet and trippled my balance (nope couldn't spend it) Does not let you sort coins No notifications Slow as hell Ass in general
Bitcoin wallet (from btc devs): No notifications No 12 word phrase back up
Bitpay: Slow to load Shady business practices No notifications
Atomic wallet Astronomically high fixed fees Slow to load Long unsortable list of coins
Edge: Slow No notifications
Greenaddress: Qr scanner opens randomly Buggy as hell No notifications
Coinomi: Must type a 10 digit pw every time you send No notifications
submitted by starkiller3373 to Bitcoin [link] [comments]

Wallet help please?

I'm using Multibit V 0.5.1 and all of my Bitcoin is "Unconfirmed."
Here's the sequence that got me here:
The wallet has been idle for at least a year.
I opened the wallet and after catching up (which, of course, took hours), my balance was confirmed.
Opened the wallet the next day; about 30% of my coin was in the balance -- the remainder was "Unconfirmed."
Repaired the wallet; about 60% of my coin was in the balance -- the remainder was "Unconfirmed."
Have restarted and repaired several times with varying percentages (sometimes 100% "Unconfirmed," but never 100% in the balance). Is currently at 100% of my coin "Unconfirmed."
All advice is appreciated. Thank you..
submitted by justdenny to Bitcoin [link] [comments]

Community. We need to upvote this post so no one else loses money!

This is a seriously important topic everyone is ignoring. Copay / Bitpay wallet has been having problems with their servers. In long story short. TONS of transactions have just gone missing from users across the world. If you go onto the copay help and support forum, there's tons of new topics of people losing funds or them being in limbo in copays system. I have lost over 3k and support is ignoring everyone's tickets... How is no one talking about this ?
EDITED TO INCLUDE BACKSTORY FROM BELOW:
So on December 9th in my copay wallet right now, I am sending out 0.043239 BTC with a fee of 0.000243btc to address : 1LqRQgKFDKfm6za8q6esdU2yFYe1zngqJc with tx : 83309d5858cf226c3c0edd360c36a2c0c059db3da3a3582f47df6cd468bf2f80
Yes I understand this was a low fee, but I send transactions ranging from 400 sat/byte to 80 sat/byte depending on the situation.. it still should have been picked up on the blockchain and in the mempool at 88 sat/b
The reciever who is my brother, has the funds recieved into his wallet. Yet this transaction is not on the blockchain. When I view the transaction in copay it directs me to bitpay insight, which then states transaction does not exist. If I paste this tx into any block explorer it doesn't exist, and if I paste the address of my brother who is recieving the funds, on the blockchain, it says there has been no recieved Bitcoin to the address. On top of this, the balance that was sent out keeps appearing and revanishing in my wallet as if it is there for a second and then disappearing, as well as in my transaction history. I have screenshots and can demonstrate how there is something wrong with copay. This has nothing to do with the mempool.
My transaction did not even touch down in the mempool, but the balance sent out of my copay ? How does this make any sense.. The representative on the copay board keeps going in circles that he encourages us to paste a txid that isn't even real into a blockexplorer other than bitpay insight.. he is also closing all tickets without resolving this problem. By hand i can count 20 people with this issue. Someone even lost 9 btc. This is ridiculous.
Please do not give me the answer that the mempool is too full or this transaction does not exist.. because it does exist, and I'm missing a total of $1500 usd from my wallet which I can view as sent out but unconfirmed and not touching down on the blockchain. I have years of experience in this industry as well as run a business around it. I am familiar with fees / acceleration as well as bumping. And this is not something anyone should be dealing with. Where is my money and how are you going to resolve this.
Here is another user who lost 3 btc with copay with similar issues.. no one is talking about this...
https://bitcointalk.org/index.php?topic=2592780.0
Another
https://github.com/bitpay/copay/issues/7498#issuecomment-352128939
Another
https://github.com/bitpay/copay/issues/7404#issuecomment-351521405
Another
https://github.com/bitpay/copay/issues/7418
submitted by crypt0hustle to Bitcoin [link] [comments]

Daily Discussion, December 03, 2017

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IOTA Definition

IOTA Definition
History of IOTA
The blockchain was announced in October 2015 through. The roots of IOTA go back to the Jinn project. That project aimed to develop ternary hardware or low-cost and energy-efficient hardware, primarily general-purpose processors, for use in the IoT ecosystem. Jinn held a crowd sale for its tokens in September 2014. The Jinn tokens were soon in hot water because they marketed as profit-sharing tokens.. In 2015, Jinn was rebranded as IOTA, and another token sale was held. This time around, the tokens were marketed as utility tokens, and Jinn token holders could exchange their tokens at equivalency with the new blockchain. According to David Sønstebø, IOTA was “spawned” due to the Jinn project. But reports state that a snapshot of the genesis transaction is yet to be found online. These tokens were dispersed to other “founder” addresses. The total number of mIOTAs planned to be in existence is 27 quadrillion. According to IOTA’s founders, the total number of mIOTAs fits in “nicely” with the maximum allowable integer value in Javascript, a programming language.
Understanding IOTA
According to research firm Gartner, there will be 20.4 billion devices connected to the Internet by 2020. Within this ecosystem, each device will exchange data and payment information with multiple, other devices in transactions conducted throughout the day. IOTA intends to become the standard mode of conducting transactions on devices. Its founders have described the ledger as a “public permission-less backbone for the Internet of Things that enables interoperability between multiple devices.” In simple words, this means that it will enable transactions between connected devices, and anyone will be able to access it. Those problems are primarily caused due to a backlog of transactions on Bitcoin’s blockchain. The backlog itself is because of a variety of reasons, from small block sizes to the difficulty of puzzles that miners must solve to earn the cryptocurrency as a reward. IOTA solves these problems by reconfiguring blockchain's architecture into Tangle, a new way of organizing data and confirming transactions.
How Does IOTA Solve Bitcoin’s Scalability Problems?
IOTA’s solution to Bitcoin’s problems is to do away with several key concepts and topographical constraints of a blockchain. mIOTA, IOTA’s cryptocurrency, is pre-mined and consensus of transactions occurs differently as compared to a blockchain. IOTA developers have proposed a new data structure. Tangle is a Decentralized Acyclic Graph, a system of nodes which is not sequential. Thus, each node can be connected to multiple other nodes in a Tangle. But they are connected only in a particular direction, meaning that a node cannot refer back to itself. A standard blockchain is also a DAG because it is a sequential linked set. In Bitcoin, a group of systems running full nodes that contain the entire history of transactions for a ledger are required for confirmations and consensus. Full node miners are not required in Tangle. Each new transaction is confirmed by referencing two previous transactions, reducing the amount of time and memory required to confirm a transaction. Related to the concept of a “confidence” is a transaction’s weight. As it moves through Tangle, a transaction gathers weight. A transaction’s weight increases with the number of approvals. Once a transaction is confirmed, it is broadcast to the entire network, and another unconfirmed transaction can choose the newly-confirmed transaction as one of the tips to confirm itself.
Governance Protocol
IOTA has not outlined a governance structure for its blockchain. The IOTA Foundation is primarily responsible for funding and leading development of IOTA. In a previous post, John Licciardello, former managing director of IOTA's Ecosystem Development Fund (EDF), that would allow members of the IOTA community to vote on proposals regarding its future direction. But there are no updates on the initiative yet.
Concerns About IOTA
Criticism of IOTA has mainly centered around its technical flaws. As with most cryptocurrencies, IOTA’s system is nascent and unproven. A phishing attack on its network resulted in the theft of mIOTA worth $3.94 million. In other words, they created their encryption scheme from scratch, forgoing the widely-used SHA-256 hash function used in Bitcoin. The team at MIT’s Digital Currency Initiative found serious vulnerabilities with IOTA’s hash function, which is called Curl. This property is known as Collision and denotes a broken hash function. In their analysis of the vulnerability, the MIT team stated that a bad actor could have destroyed or stolen user funds from Tangle with their technique. IOTA’s team has corrected the vulnerability. The foundation announced a new partnership with Ledger, one of the leading producers of hardware wallets. IOTA technology will be integrated into the hardware wallets, giving users the ability to store the private key information in a device that adds another layer of protection from hackers.
https://preview.redd.it/ex768bb74gw31.jpg?width=777&format=pjpg&auto=webp&s=4e89f0875410274a85b76227c17d321b5c3d29ed
“The collaboration between the teams created an immediate synergy concentrated on developing a compatibility feature allowing users to access, store and manage IOTA tokens on Ledger devices. 

The IOTA (MIOTA) digital asset suffered from a lack of adequate wallets for months, even at the peak of the market. The asset, which commanded prices above $5, was not spared by the bear market. Despite the launch of the long-awaited Trinity wallet, MIOTA lost positions. Given that mIOTA, the crypto used in IOTA, is still to gain mainstream traction, its claims to eliminate scalability problems for blockchains through the use of DAGs are also still to be proven. Vitalik Buterin, the co-founder of Ethereum, has cast doubt on the ability of hashgraphs to solve scalability issues.
Another problem with IOTA currently is the small size of its network. Researchers have found that hackers need only gain control of 33% of the total hashing power required to bring it down. In Bitcoin, control of 51% of a network is required to bring its blockchain down. To ensure security, IOTA’s network currently uses a central server known as a Coordinator to process transactions. This practice has diluted its claims of being a decentralized system since the introduction of a Coordinator has resulted in the introduction of a single point of failure.
The consensus system is described in a new white paper. In the past, IOTA has been criticized for its hidden centralization, as well as for the loss of coins sometimes happening when a user’s wallet was unable to receive its previous balances from the state of the Tangle.
But despite the innovation, IOTA lags behind digital assets that are receiving the most significant inflows of investment and trading liquidity.
submitted by Avra11 to u/Avra11 [link] [comments]

BIP148 and the risks it entails for you (whether you run a BIP148 node or not)

BIP148 is happening beginning on August 1st, 2017. But what does that mean for the average user?
For purposes of reading clarity, "legacy" means nodes not enforcing BIP148.

Risks for both legacy and BIP148 nodes (and the wallets trusting them)

If and only if BIP148 has minority hashrate support, there will be a chain split. Whether your node supports BIP148 or not, there is a risk that your economic counterparties (ie, people you want to pay and people you want to pay you) will be on the other side of the split. So long as nobody double-spends, this should be mostly okay for 100 blocks (about 16 hours); the only difference will be that transactions might confirm at different times. But if 100 blocks pass and miners begin spending their newly mined bitcoins (different on each side of the split), the chains' balances will begin to diverge, and transactions will become tied to one side or the other. There will be two "bitcoins".

Risks only for BIP148 nodes

Hey, there are none! :)

Risks only for legacy nodes

If the chain splits, then when / if / every time the BIP148 chain gets longer*, it will replace the legacy chain. Transactions that had confirmed on the legacy chain will become unconfirmed (unless they are also confirmed on the BIP148 chain). Bitcoins mined by legacy miners will cease to exist, as they lose their blocks. (This cannot occur in the inverse direction: no matter how long the legacy chain gets, BIP148 nodes will never let it reorg out the BIP148 chain.)
If the chain splits, the BIP148 side will have Segwit activating, whereas the legacy side will remain stagnated. There is a possibility this will give a market bias in favour of the BIP148 side, even independently from its initial adoption.
* Note that even a minority-hashrate chain can get longer than the majority-hashrate chain with some variance, although this becomes less probable with time. (On the other hand, the longer the chain split goes on, the more likely the BIP148 side grows in hashrate relative to the legacy side.)

Avoiding a chain split (and all the risks above)

A chain split can be avoided entirely if a sufficient amount of the economy adopts BIP148. Miners depend on their minted bitcoins in order to pay electric costs and recoup ASIC R&D costs. If the price they can sell their legacy bitcoins drops too significantly (possibly to zero when/if their blocks get reorg'd out by the BIP148 chain), they will have no choice but to switch to the BIP148 chain themselves, ensuring it is the longest chain for both BIP148 and legacy nodes. If the economy shows strong enough deployment of BIP148 prior to August 1st, it is even possible miners may switch preemptively, avoiding a chain split from occurring altogether. Note that only 51% of miners need to switch to the BIP148 chain to resolve or prevent the chain split, not the original 95% target.
BIP148 can also be automatically cancelled entirely by locking in Segwit before August 1st.
So there are a few ways a persistent chain split might be avoided:
Basically, everyone’s risks go down with more people running BIP148 nodes. :)
submitted by luke-jr to Bitcoin [link] [comments]

Daily Discussion, December 02, 2017

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