1 minute before I wanted to send Bitcoin to my wallet (Bitcoin-QT), this error came up. Never had any problems until today. The reason this makes me nervous: This error came up on 2 completely different machines at the same time. Both QT, Mac ("Unsafe" hot wallet) and Ubuntu ("Safe" hot wallet).
[Hiring] Write some Bitcoin-Qt commands templates to sign transaction on offline machine.
Its not necessary to have too much experience with Bash, but I prefer making these scripts in Bash. Or I need any solution to make my Ubuntu machine to be able to sign transactions (but receiving commands to move funds from Web-server or from FTP) Anyway even if you're newbie in Linux but have experience with Bitcoin-Qt I am still interested in your skills, because I believe I could show you how easy it is to send commands to Bitcoin-Qt in Ubuntu Terminal (I will give an access) I think the price here will be depending on hourly basis, so think about what is your hourly rate or other measure of payment and I will be glad to pay you Bitcoins.
Bitcoin Qt wallet safety question: can I have two addresses on the same Bitcoin QT wallet in the same machine? Is It safer to store your bitcoins that way in case one address get hacked?
I just want to split some of my bitcoins in case something goes wrong with my wallet or I get hacked. But I don't trust other computers to hold them so They are all going to be in my computer anyway, and since I can't have a second BitcoinQt wallet installed I thought about just creating a new addresss and sending some bitcoins to the new address. How safer am I if I create another address and transfer some bitcoins to the new address? Obviously The new address would have another password and other backups as well. Thanks.
https://github.com/gridcoin-community/Gridcoin-Research/releases/tag/184.108.40.206 Finally! After over ten months of development and testing, "Fern" has arrived! This is a whopper. 240 pull requests merged. Essentially a complete rewrite that was started with the scraper (the "neural net" rewrite) in "Denise" has now been completed. Practically the ENTIRE Gridcoin specific codebase resting on top of the vanilla Bitcoin/Peercoin/Blackcoin vanilla PoS code has been rewritten. This removes the team requirement at last (see below), although there are many other important improvements besides that. Fern was a monumental undertaking. We had to encode all of the old rules active for the v10 block protocol in new code and ensure that the new code was 100% compatible. This had to be done in such a way as to clear out all of the old spaghetti and ring-fence it with tightly controlled class implementations. We then wrote an entirely new, simplified ruleset for research rewards and reengineered contracts (which includes beacon management, polls, and voting) using properly classed code. The fundamentals of Gridcoin with this release are now on a very sound and maintainable footing, and the developers believe the codebase as updated here will serve as the fundamental basis for Gridcoin's future roadmap. We have been testing this for MONTHS on testnet in various stages. The v10 (legacy) compatibility code has been running on testnet continuously as it was developed to ensure compatibility with existing nodes. During the last few months, we have done two private testnet forks and then the full public testnet testing for v11 code (the new protocol which is what Fern implements). The developers have also been running non-staking "sentinel" nodes on mainnet with this code to verify that the consensus rules are problem-free for the legacy compatibility code on the broader mainnet. We believe this amount of testing is going to result in a smooth rollout. Given the amount of changes in Fern, I am presenting TWO changelogs below. One is high level, which summarizes the most significant changes in the protocol. The second changelog is the detailed one in the usual format, and gives you an inkling of the size of this release.
Note that the protocol changes will not become active until we cross the hard-fork transition height to v11, which has been set at 2053000. Given current average block spacing, this should happen around October 4, about one month from now. Note that to get all of the beacons in the network on the new protocol, we are requiring ALL beacons to be validated. A two week (14 day) grace period is provided by the code, starting at the time of the transition height, for people currently holding a beacon to validate the beacon and prevent it from expiring. That means that EVERY CRUNCHER must advertise and validate their beacon AFTER the v11 transition (around Oct 4th) and BEFORE October 18th (or more precisely, 14 days from the actual date of the v11 transition). If you do not advertise and validate your beacon by this time, your beacon will expire and you will stop earning research rewards until you advertise and validate a new beacon. This process has been made much easier by a brand new beacon "wizard" that helps manage beacon advertisements and renewals. Once a beacon has been validated and is a v11 protocol beacon, the normal 180 day expiration rules apply. Note, however, that the 180 day expiration on research rewards has been removed with the Fern update. This means that while your beacon might expire after 180 days, your earned research rewards will be retained and can be claimed by advertising a beacon with the same CPID and going through the validation process again. In other words, you do not lose any earned research rewards if you do not stake a block within 180 days and keep your beacon up-to-date. The transition height is also when the team requirement will be relaxed for the network.
Besides the beacon wizard, there are a number of improvements to the GUI, including new UI transaction types (and icons) for staking the superblock, sidestake sends, beacon advertisement, voting, poll creation, and transactions with a message. The main screen has been revamped with a better summary section, and better status icons. Several changes under the hood have improved GUI performance. And finally, the diagnostics have been revamped.
The wallet sync speed has been DRASTICALLY improved. A decent machine with a good network connection should be able to sync the entire mainnet blockchain in less than 4 hours. A fast machine with a really fast network connection and a good SSD can do it in about 2.5 hours. One of our goals was to reduce or eliminate the reliance on snapshots for mainnet, and I think we have accomplished that goal with the new sync speed. We have also streamlined the in-memory structures for the blockchain which shaves some memory use. There are so many goodies here it is hard to summarize them all. I would like to thank all of the contributors to this release, but especially thank @cyrossignol, whose incredible contributions formed the backbone of this release. I would also like to pay special thanks to @barton2526, @caraka, and @Quezacoatl1, who tirelessly helped during the testing and polishing phase on testnet with testing and repeated builds for all architectures. The developers are proud to present this release to the community and we believe this represents the starting point for a true renaissance for Gridcoin!
Most significantly, nodes calculate research rewards directly from the magnitudes in EACH superblock between stakes instead of using a two- or three- point average based on a CPID's current magnitude and the magnitude for the CPID when it last staked. For those long-timers in the community, this has been referred to as "Superblock Windows," and was first done in proof-of-concept form by @denravonska.
Network magnitude unit pinned to a static value of 0.25
Max research reward allowed per block raised to 16384 GRC (from 12750 GRC)
New CPIDs begin accruing research rewards from the first superblock that contains the CPID instead of from the time of the beacon advertisement
500 GRC research reward limit for a CPID's first stake
6-month expiration for unclaimed rewards
10-block spacing requirement between research reward claims
Rolling 5-day payment-per-day limit
Legacy tolerances for floating-point error and time drift
The need to include a valid copy of a CPID's magnitude in a claim
10-block emission adjustment interval for the magnitude unit
One-time beacon activation requires that participants temporarily change their usernames to a verification code at one whitelisted BOINC project
Verification codes of pending beacons expire after 3 days
Self-service beacon removal
Burn fee for beacon advertisement increased from 0.00001 GRC to 0.5 GRC
Rain addresses derived from beacon keys instead of a default wallet address
Beacon expiration determined as of the current block instead of the previous block
The ability for developers to remove beacons
The ability to sign research reward claims with non-current but unexpired beacons
As a reminder:
Beacons expire after 6 months pass (180 days)
Beacons can be renewed after 5 months pass (150 days)
Renewed beacons must be signed with the same key as the original beacon
Magnitudes less than 1 include two fractional places
Magnitudes greater than or equal to 1 but less than 10 include one fractional place
A valid superblock must match a scraper convergence
Superblock popularity election mechanics
Yes/no/abstain and single-choice response types (no user-facing support yet)
To create a poll, a maximum of 250 UTXOs for a single address must add up to 100000 GRC. These are selected from the largest downwards.
Burn fee for creating polls scaled by the number of UTXOs claimed
50 GRC for a poll contract
0.001 GRC per claimed UTXO
Burn fee for casting votes scaled by the number of UTXOs claimed
0.01 GRC for a vote contract
0.01 GRC to claim magnitude
0.01 GRC per claimed address
0.001 GRC per claimed UTXO
Maximum length of a poll title: 80 characters
Maximum length of a poll question: 100 characters
Maximum length of a poll discussion website URL: 100 characters
Maximum number of poll choices: 20
Maximum length of a poll choice label: 100 characters
Magnitude, CPID count, and participant count poll weight types
The ability for developers to remove polls and votes
[220.127.116.11] 2020-09-03, mandatory, "Fern"
Backport newer uint256 types from Bitcoin #1570 (@cyrossignol)
Implement project level rain for rainbymagnitude #1580 (@jamescowens)
Upgrade utilities (Update checker and snapshot downloadeapplication) #1576 (@iFoggz)
Provide fees collected in the block by the miner #1601 (@iFoggz)
Add support for generating legacy superblocks from scraper stats #1603 (@cyrossignol)
Port of the Bitcoin Logger to Gridcoin #1600 (@jamescowens)
Implement zapwallettxes #1605 (@jamescowens)
Implements a global event filter to suppress help question mark #1609 (@jamescowens)
Add next target difficulty to RPC output #1615 (@cyrossignol)
Add caching for block hashes to CBlock #1624 (@cyrossignol)
Make toolbars and tray icon red for testnet #1637 (@jamescowens)
Add an rpc call convergencereport #1643 (@jamescowens)
Implement newline filter on config file read in #1645 (@jamescowens)
Implement beacon status icon/button #1646 (@jamescowens)
Add gridcointestnet.png #1649 (@caraka)
Add precision to support magnitudes less than 1 #1651 (@cyrossignol)
Replace research accrual calculations with superblock snapshots #1657 (@cyrossignol)
Publish example gridcoinresearch.conf as a md document to the doc directory #1662 (@jamescowens)
Add options checkbox to disable transaction notifications #1666 (@jamescowens)
Add support for self-service beacon deletion #1695 (@cyrossignol)
Add support for type-specific contract fee amounts #1698 (@cyrossignol)
Add verifiedbeaconreport and pendingbeaconreport #1696 (@jamescowens)
Add preliminary testing option for block v11 height on testnet #1706 (@cyrossignol)
Add verified beacons manifest part to superblock validator #1711 (@cyrossignol)
Implement beacon, vote, and superblock display categories/icons in UI transaction model #1717 (@jamescowens)
I already downloaded the blockchain. How do I tell Core to use that copy?
I was previously using bitcoin-qt.exe, emulated on my Linux machine. I have lost the ability to emulate that. (I won't go into details.) I therefore downloaded the Ubuntu version of Bitcoin Core, and am about to try to install that. It is asking me where I want to download the entire 300 GB blockchain, again. I have already downloaded it. I don't have room on my computer to download a second copy of it. It's already taking up 300 GB of space on my harddrive. Do I have to delete my previous copy of the blockchain? Or can I tell Bitcoin Core where to find it, so that it doesn't have to redownload it all over again? (I am also hoping this will save time; but time is less important to me than disk space.)
I'm syncing a full node on a Raspberry pi 4 with 8GB memory, external disk drive (not ssd), broadband internet. It's going extremely slow--estimated time about 4 years. Google has turned up all kinds of advice like setting: dbcache=4096 (setting aside half my ram) blocksonly=1 banscore=10 listen=0 par=-1 When I run top, I see bitcoin-qt is only using about 12% of the CPU. When it boots and is loading the block index, I see that go up to 100+%. So for whatever reason, it's not fully utilizing the CPU on the machine while processing blocks. I tested my internet connection and have 56Mbps down, 6Mbps up. My only theory is that the external hard drive is being the bottleneck. Is there anything else to do, or should I order a SSD?
Can you please help to validate my cold storage setup?
I would like to create a Bitcoin QT Core node without any connection to the internet, and I want to use that node to create transactions. I plan to have two machines. One that runs the offline node, and another that is online. I want to sync the blockchain on the online node. And when I need to make a transaction on the offline node, then I would going to update it's blockchain by copying it from the online node using an external HDD. And when I copied the blockchain to the offline node, I want to use the QT core to create and sign the transaction then get the raw transaction data from the console by TX ID and broadcast it with some online service. I will scan the external HDD for viruses on both machines, plus I will verify the checksums to make sure the files I copy are valid. In this scenario the offline node will be a bit outdated at the moment when I want to create the transaction, because of the delay that happens while I copy the files from the online node to the offline one. Will it still allow me to create the transaction? Is there any other factor that could prevent this setup working? I know I could import the addresses to the online node, create the transaction and sign it on the offline node, but I want to avoid that because I plan to have thousands of addresses. Thanks!
Evo uses Proof of Stake consensus mechanism, which is different from Bitcoin's PoW (Proof of Work). Evo mining process in PoS system is called staking. The block producer will get 6.5EVO, as well as the transaction fees and gases as block reward. So the real reward is usually more than 6.5 evo in total. Basic requirements for staking：
Run a Coinevo fullnode, and keep online (Since Coinevo is using PoS, we don't need any mining machine, just PC or even Raspberry Pi can run a fullnode);
Have some EVO in the wallet (fullnode)（Any amount of EVO can be used for staking, more EVO means higher possibility to stake).
If you have no EVO yet, please get some from market before you doing following staking settings. Currently, Coinevo Core wallet is the only wallet that support Coinevo PoS staking. Note that other wallets like mobile wallet and Evo Electrum are not able to stake for the time being. Two ways to stake:
Method 1：Staking with evod, using command line, suitable for Linux/OSX/Windows/Raspberry Pi users who are familiar with command line tools.
Method 2：Staking with evo-qt wallet, with GUI, suitable for common users.
Either way works in the same way for staking, so you can choose either method you like.
Method 1：Staking with evod (command line)
1. Run evod
Follow the guidance to run evod :
Staking is default on for evod, so no need for other options if you only want to stake.
2. Send some EVO to your wallet
First you can generate a new address with：
This will generate a new address with Prefix '1'. You can send some EVO to this new generated address for staking. You can generate as many addresses as you like, and send arbitrary EVO as you like for staking. Note：The coin should wait for 500 blocks before being able to stake, i.e. about 17 to 24 hours to MATURE.. After the EVO node syncing to the latest block, you can check current balance with ./evo-cli getbalance or get utxo list with./evo-cli listunspent Please do following steps after your coin is mature.
enabled means if your wallet have enabled staking, it should be true by default. staking means if your wallet is currently staking (mining). weight stands for the amount of EVO that is staking right now, with unit 10^-8EVO, here in the example, we have 0.532EVO staking. expectedtime stands for the expected time that you will get a reward, the unit is second.
4. How to stake if the wallet is encrypted？
If your wallet is not encrypted, you can skip this section. However, for security, we recommand you encrypt your wallet. Coinevo wallet can be encrypted with encryptwallet . However, staking will be stopped when it is encrypted. For example, ./evo-cli getstakinginfo for a encrypted wallet：
See staking turns to false , which means wallet is not staking. You can use walletpassphrase to unlock wallet for staking：
./evo-cli walletpassphrase "" 99999999 true
After unlocking, you can double check getstakinginfo , it should look the same with previous unlocked result, staking become true.
Method 2: Staking with evo-qt wallet (official PC wallet)
Current supported platform: Mac/Linux/Windows.
1. Open Evo qt wallet
Launch the wallet.
2. Send some EVO to your wallet
If you already have some EVO in your wallet, you might skip this step. Note：The coin should wait for 500 blocks before being able to stake, i.e. about 17 to 24 hours to MATURE..
3. Check staking status
The flash sign at the bottom of wallet shows staking info : Solid black flash means it is staking now. For more information, you can put your mouse on the flash, e.g.:
Staking : if it is staking；
Your weight is : How many EVO are able to used for staking, unit is EVO;
Network weight is : How many EVO are staking in the network, unit is EVO；
Expected time : expected time to get reward, unit is Day.
Hollow flash measn it is not staking Possible reasons for not staking：
1.There is no coins of no mature coins (more than 500 confirmations(blocks)) -- Solution: send some EVO to the wallet and wait for 500 blocks (about 17 hours);
2.Wallet is locked/encrypted -- Solution: unlock the wallet for staking.
No flash sign means staking is disabled
3.Staking is disabled -- Solution: enable staking in the evo.conf (-staking=true)
About block reward
The block producer will get more than 6.5 EVO rewards, something to keep in mind:
The reward come from a new transaction, you can check balance to see if you get the reward.
Once succesfully stake, you will get 0.65EVO reward immediately.
Other 5.85EVO will be sent to you after 500 blocks (about 17 or 24 hours), in continuous 9 blocks, within each block you will get 0.65EVO,, so in total it will be 5.85EVO.
The staked coins (UTXO) will be locked for 500 blocks, during this period, it cannot be spent nor be used to stake.
How to disable staking?
Staking is by default enabled for Coinevo wallet. If you need to disable staking for some reason (for example exchanges are always recommanded to disable staking), you might following anyone of the 3 ways below: 1 Add -staking=false when running Coinevo node：
./evod -staking=false -daemon
For qt wallet, it is like：
2 Add config staking=false in evo.conf; 3 Encrypt wallet, since encrypted wallet will automatically stop staking.
The last month in the world of Mousecoin has been HUGE! There have been many changes, the addition of new awesome ways to earn MIC3 including ourFaucetspage and thePhoneumGames. We have also seen the launch of ourCommunity Membership, which entitles each registered user to receive up to 200,000 MIC3 per month. We hope you are all keeping safe and are happy to provide you with our Mousecoin Network May 2020 Report.
MOUSECOIN IN GAMES!!
FINALLY, after months of negotiation and with the help ofPhoneum, Mousecoin has partnered withPhoneumto be included in two of the most popularPhoneumcrypto games currently available.We have added a newGamespage, whiche features all the information and link for the games, with more to come.Here is the run down:
📷 Crypto Treasures is a game, where players complete various quests, trivia and mini games to unlock Gold (in-game currency), Treasure Chests, Items, Collectibles, and various Crypto currencies, including the featured Mousecoin (MIC3).
📷 Visit a new type of planet, one that allows you to earn real cryptocurrencies while playing a beautiful and futuristic game. The main objective is to extract the valuable resources of the planet: Crystals. There is a special machine designed specifically to dig up the Crystals automatically and deliver them to you. All you have to do is activate the Digger and after 4 hours, it will have the resources ready to be claimed.
Earn up to 200,000 MIC3 Per Month!
At the beginning of last month we began establishing ourCommunity Membershipwhich offers all registered Mousecoin Members a share of the rewards earned from theCommunity Fundjust for being a member and following Mousecoin on all of oursocial media.As we come to the end of the first month we are currently in the process of checking all registrations and working out payments. We have also updated the profile page to include a Member News tab, Verified Notifications for each Social Media and a Monthly Payment History section. We are currently working on verifying all accounts registered before 1/6/2020, and should have all of these processed in the next few days, with all payment going out before the end of the week.
Become a part of the Mousecoin (MIC3) Community.Membership is FREE and it comes with HUGE bonuses!!
Just a reminder for the community and also for any new members, we have added aWallet Setup Guidespage, which takes any first time user of Mousecoin step-by-step through the process of installing their Mousecoin wallet and getting it online. The guide uses the latestblockchain snapshotfound on theWallet DownloadsPage in the example explanation meaning that all new members of the Mousecoin community will be able to get their wallets online faster as the sync time should be minimal. We will be updating theblockchain snapshotat least once every month to ensure that people have access to the most up to date blockchain info. The latestblockchain snapshotwas performed on the 1st June 2020. The wallet version is currenty V18.104.22.168, with future releases of the Mousecoin wallet coming soon If you are new to crypto currency or just after a bit of guidance setting up the Mousecoin wallet, check out ourWallet Setup Guides 📷Windows 📷Raspberry Pi 📷Wallet & Blockchain Snapshot Download (UPDATED 01-06-2020)
POS & STAKING
In the last month we asked the community if they would be interested in being a part of a Community Staking Pool. After investigations into this finding security flaws in most platforms, as well as the lack of interest from members of the community we have decided to not go ahead with the Community Staking Pool. While we understand that there are members of the Mousecoin Community that are unable to stake themselves for whatever reason, and that there are a number of staking platforms that offer pool staking for MIC3 to help these people stake, we will not officially be supporting any staking platforms.We ask all Community members using these or thinking about using these to keep in mind that any MIC3 hosted on these platforms is not in their wallets, and therefore not controlled by them. Do proper investigations into any platform that you use for this as there is always the possibility of loss. We encourage all members of the Mousecoin Community to stake from their own wallet (where possible) as this helps us to secure the network. If you need help setting up your wallet, go to ourWallet Setup Guidespage for step-by-step guides on setting up your Mousecoin wallet.
We have updated the Mousecoin (MIC3)FaucetsPage: To make things clearer and we will be adding more faucets soon!
Last month we saw the edition of theUSDT/MIC3pair tonanu exchange. In our efforts to increase exposure of Mousecoin, we are still attempting to list on bothATAIXandUnnamed.Exhchange. ATAIXWe have risen to 18th position in the voting list onATAIX, but we still need your votes. Remember you can vote every 24 hours for this listing, and you can share in 125,000,000 MIC3 📷 Unnamed.ExhchangeThe exchange listing forUnnamed.Exhchangeis 0.05 BTC.For anyone unfamiliar with the exchange there are two ways that you can donate to the listing: 1. If you are already a member of, or wish to be a member ofUnnamed.Exhchange(and why wouldn’t you), you can put funds towards our listing by tipping us through the trollbox (Mousecoins). If you wish to be a member ofUnnamed.Exhchange, you can register here:https://www.unnamed.exchange/Login/Register 2. You can also donate to the listing fee through the following addresses:BTC – bc1qmaqzhfqcw0urva0rtgfz5qvq4rw7kdnp6j7754LTC – ltc1qc775eeftdde2jrevnyukrd2w9853jy5gmtv6rnDOGE – DEnBpriaFnKiNeBv6Q7MVxMg5hLv5urQFgUTIP – AUTyu2JhGAaCkM3KAmeBopto2bNBchNJfE If you would like to donate in another crypto available onUnnamed.Exhchange, we have opened up the chat on the Discord channelHEREto assist with this. Please request the address and we will provide it for you.ANY AND ALL DONATIONS ARE WELCOME!!This is a good exchange and getting a listing her should help lift the profile of MIC3. We will be reporting balances to the discord channelhttps://discord.gg/cYuA8FA
📷 In the last month theCommunity Fundhas undergone a huge amount of change. We have completely moved all of our remaining balances away from 4Stake, with the MIC3 going to theCommunity FundMIC3 account and the remaining crypto’s towards out listing onUnnamed.Exhchange. TheCommunity Fundpage on the website has also been updated to reflect all of the changes.It is an exciting time for theCommunity Fundas we have now reached a balance that will sustain itself. This is why we have introduced the Community Member payment, and are able to sustain the faucets we have onhttps://erex.io/freecoin/and in thePhoneumGames. There is still more to come! 📷
Note: I don't know exactly how long it took because I didn't do it in one go. I guess it was like 4,5 days doing it only at night. At some points(2015Q3, 2018Q2) it slows down and ETA goes up to 16 weeks or something. The main bottleneck is IO. My 2013 mobile i3 has enough processing power to sync, I only used 3 threads and most of the time only one was close to 100%. The two directories that need to be written and read from intensively are chainstate and blocks/index. I pruned to 2GB and chainstate didn't go much over 3GB during the entire process. blocks/index is like 100MB. The best solution is to move chainstate and blocks/index to a ramdisk. If you don't have enough ram the linux kernel has a thing called zram. Zram creates a compressed swap(cache) file in ram, this effectively increases your ram size at the cost of a bit of processing power and access speed(of the compressed part). On my machine I can net a bit more than 1GB of extra ram. That's right, with linux you can download more ram! The second best solution is to leave chainstate and block/index on a sdd. From what I've tested it should take up between 5 whole days and 2 weeks. With regards to config, I didn't see much benefit in increasing the db cache over the default 450MB in bitcoin-qt. If I recall correctly, smaller prune sizes make chainstate larger. After the initial sync keeping up to date is very easy on resources. You can catch up a week in a few minutes. At the moment bitcoind is using 400MB but I'm still working on bringing that number down. Remember: If you want safety or if you want to help the network you need o run a full node. A full node is a node that verifies all transactions. A pruned node is a full node. Edit: bitocoind really likes to hover around 400MB, sometimes it gets higher than that, some times it get's lower. A lot of that is data, not code, so if you start running out of ram your OS should drop those pages and get down to 250~300MiB. If you really want the memory to be this low all the time, on linux, you can either: Use cgroups to set the swappiness of the process to 99 so all data gets swapped but not code does; Use systemd and set MemoryLimit=300MiB(for example) so almost all data gets swapped but no code. I don't think any of those options are worth the small setup hassle.
PS Ubuntu PPA repository is currently being updated to serve for 1.7.0 (*) if you were using BU with -txindex, after the fist session after the upgrade the database where the index are stored will be upgraded to a new format. During this migration RPC command will return an error message saying the txindex is syncing. The lasting of the migration process depends on the machine where BU is installed.
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.
Builds are now done through Gitian
Calls to getblocktemplate will fail if the segwit rule is not specified. Calling getblocktemplate without segwit specified is almost certainly a misconfiguration since doing so results in lower rewards for the miner. Failed calls will produce an error message describing how to enable the segwit rule.
A warning is printed if an unrecognized section name is used in the configuration file. Recognized sections are [test], [main], and [regtest].
Four new options are available for configuring the maximum number of messages that ZMQ will queue in memory (the "high water mark") before dropping additional messages. The default value is 1,000, the same as was used for previous releases.
The rpcallowip option can no longer be used to automatically listen on all network interfaces. Instead, the rpcbind parameter must be used to specify the IP addresses to listen on. Listening for RPC commands over a public network connection is insecure and should be disabled, so a warning is now printed if a user selects such a configuration. If you need to expose RPC in order to use a tool like Docker, ensure you only bind RPC to your localhost, e.g. docker run [...] -p 127.0.0.1:1441:1441 (this is an extra :1441 over the normal Docker port specification).
The rpcpassword option now causes a startup error if the password set in the configuration file contains a hash character (#), as it's ambiguous whether the hash character is meant for the password or as a comment.
The whitelistforcerelay option is used to relay transactions from whitelisted peers even when not accepted to the mempool. This option now defaults to being off, so that changes in policy and disconnect/ban behavior will not cause a node that is whitelisting another to be dropped by peers.
A new short about the JSON-RPC interface describes cases where the results of anRPC might contain inconsistencies between data sourced from differentsubsystems, such as wallet state and mempool state.
A new document introduces Groestlcoin Core's BIP174 interface, which is used to allow multiple programs to collaboratively work to create, sign, and broadcast new transactions. This is useful for offline (cold storage) wallets, multisig wallets, coinjoin implementations, and many other cases where two or more programs need to interact to generate a complete transaction.
The output script descriptor (https://github.com/groestlcoin/groestlcoin/blob/mastedoc/descriptors.md) documentation has been updated with information about new features in this still-developing language for describing the output scripts that a wallet or other program wants to receive notifications for, such as which addresses it wants to know received payments. The language is currently used in multiple new and updated RPCs described in these release notes and is expected to be adapted to other RPCs and to the underlying wallet structure.
A new --disable-bip70 option may be passed to ./configure to prevent Groestlcoin-Qt from being built with support for the BIP70 payment protocol or from linking libssl. As the payment protocol has exposed Groestlcoin Core to libssl vulnerabilities in the past, builders who don't need BIP70 support are encouraged to use this option to reduce their exposure to future vulnerabilities.
The minimum required version of Qt (when building the GUI) has been increased from 5.2 to 5.5.1 (the depends system provides 5.9.7)
getnodeaddresses returns peer addresses known to this node. It may be used to find nodes to connect to without using a DNS seeder.
listwalletdir returns a list of wallets in the wallet directory (either the default wallet directory or the directory configured bythe -walletdir parameter).
getrpcinfo returns runtime details of the RPC server. Currently, it returns an array of the currently active commands and how long they've been running.
deriveaddresses returns one or more addresses corresponding to an output descriptor.
getdescriptorinfo accepts a descriptor and returns information aboutit, including its computed checksum.
joinpsbts merges multiple distinct PSBTs into a single PSBT. The multiple PSBTs must have different inputs. The resulting PSBT will contain every input and output from all the PSBTs. Any signatures provided in any of the PSBTs will be dropped.
analyzepsbt examines a PSBT and provides information about what the PSBT contains and the next steps that need to be taken in order to complete the transaction. For each input of a PSBT, analyze psbt provides information about what information is missing for that input, including whether a UTXO needs to be provided, what pubkeys still need to be provided, which scripts need to be provided, and what signatures are still needed. Every input will also list which role is needed to complete that input, and analyzepsbt will also list the next role in general needed to complete the PSBT. analyzepsbt will also provide the estimated fee rate and estimated virtual size of the completed transaction if it has enough information to do so.
utxoupdatepsbt searches the set of Unspent Transaction Outputs (UTXOs) to find the outputs being spent by the partial transaction. PSBTs need to have the UTXOs being spent to be provided because the signing algorithm requires information from the UTXO being spent. For segwit inputs, only the UTXO itself is necessary. For non-segwit outputs, the entire previous transaction is needed so that signers can be sure that they are signing the correct thing. Unfortunately, because the UTXO set only contains UTXOs and not full transactions, utxoupdatepsbt will only add the UTXO for segwit inputs.
getpeerinfo now returns an additional minfeefilter field set to the peer's BIP133 fee filter. You can use this to detect that you have peers that are willing to accept transactions below the default minimum relay fee.
The mempool RPCs, such as getrawmempool with verbose=true, now return an additional "bip125-replaceable" value indicating whether thetransaction (or its unconfirmed ancestors) opts-in to asking nodes and miners to replace it with a higher-feerate transaction spending any of the same inputs.
settxfee previously silently ignored attempts to set the fee below the allowed minimums. It now prints a warning. The special value of"0" may still be used to request the minimum value.
getaddressinfo now provides an ischange field indicating whether the wallet used the address in a change output.
importmulti has been updated to support P2WSH, P2WPKH, P2SH-P2WPKH, and P2SH-P2WSH. Requests for P2WSH and P2SH-P2WSH accept an additional witnessscript parameter.
importmulti now returns an additional warnings field for each request with an array of strings explaining when fields are being ignored or are inconsistent, if there are any.
getaddressinfo now returns an additional solvable Boolean field when Groestlcoin Core knows enough about the address's scriptPubKey, optional redeemScript, and optional witnessScript for the wallet to be able to generate an unsigned input spending funds sent to that address.
The getaddressinfo, listunspent, and scantxoutset RPCs now return an additional desc field that contains an output descriptor containing all key paths and signing information for the address (except for the private key). The desc field is only returned for getaddressinfo and listunspent when the address is solvable.
importprivkey will preserve previously-set labels for addresses or public keys corresponding to the private key being imported. For example, if you imported a watch-only address with the label "coldwallet" in earlier releases of Groestlcoin Core, subsequently importing the private key would default to resetting the address's label to the default empty-string label (""). In this release, the previous label of "cold wallet" will be retained. If you optionally specify any label besides the default when calling importprivkey, the new label will be applied to the address.
getmininginfo now omits currentblockweight and currentblocktx when a block was never assembled via RPC on this node.
The getrawtransaction RPC & REST endpoints no longer check the unspent UTXO set for a transaction. The remaining behaviors are as follows:
If a blockhash is provided, check the corresponding block.
If no blockhash is provided, check the mempool.
If no blockhash is provided but txindex is enabled, also check txindex.
unloadwallet is now synchronous, meaning it will not return until the wallet is fully unloaded.
importmulti now supports importing of addresses from descriptors. A desc parameter can be provided instead of the "scriptPubKey" in are quest, as well as an optional range for ranged descriptors to specify the start and end of the range to import. Descriptors with key origin information imported through importmulti will have their key origin information stored in the wallet for use with creating PSBTs.
listunspent has been modified so that it also returns witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output.
createwallet now has an optional blank argument that can be used to create a blank wallet. Blank wallets do not have any keys or HDseed. They cannot be opened in software older than 2.18.2. Once a blank wallet has a HD seed set (by using sethdseed) or private keys, scripts, addresses, and other watch only things have been imported, the wallet is no longer blank and can be opened in 2.17.2. Encrypting a blank wallet will also set a HD seed for it.
signrawtransaction is removed after being deprecated and hidden behind a special configuration option in version 2.17.2.
The 'account' API is removed after being deprecated in v2.17.2 The 'label' API was introduced in v2.17.2 as a replacement for accounts. See the release notes from v2.17.2 for a full description of the changes from the 'account' API to the 'label' API.
addwitnessaddress is removed after being deprecated in version 2.16.0.
generate is deprecated and will be fully removed in a subsequent major version. This RPC is only used for testing, but its implementation reached across multiple subsystems (wallet and mining), so it is being deprecated to simplify the wallet-node interface. Projects that are using generate for testing purposes should transition to using the generatetoaddress RPC, which does not require or use the wallet component. Calling generatetoaddress with an address returned by the getnewaddress RPC gives the same functionality as the old generate RPC. To continue using generate in this version, restart groestlcoind with the -deprecatedrpc=generate configuration option.
Be reminded that parts of the validateaddress command have been deprecated and moved to getaddressinfo. The following deprecated fields have moved to getaddressinfo: ismine, iswatchonly,script, hex, pubkeys, sigsrequired, pubkey, embedded,iscompressed, label, timestamp, hdkeypath, hdmasterkeyid.
The addresses field has been removed from the validateaddressand getaddressinfo RPC methods. This field was confusing since it referred to public keys using their P2PKH address. Clients should use the embedded.address field for P2SH or P2WSH wrapped addresses, and pubkeys for inspecting multisig participants.
A new /rest/blockhashbyheight/ endpoint is added for fetching the hash of the block in the current best blockchain based on its height (how many blocks it is after the Genesis Block).
A new Window menu is added alongside the existing File, Settings, and Help menus. Several items from the other menus that opened new windows have been moved to this new Window menu.
In the Send tab, the checkbox for "pay only the required fee" has been removed. Instead, the user can simply decrease the value in the Custom Fee rate field all the way down to the node's configured minimumrelay fee.
In the Overview tab, the watch-only balance will be the only balance shown if the wallet was created using the createwallet RPC and thedisable_private_keys parameter was set to true.
The launch-on-startup option is no longer available on macOS if compiled with macosx min version greater than 10.11 (useCXXFLAGS="-mmacosx-version-min=10.11" CFLAGS="-mmacosx-version-min=10.11" for setting the deployment sdkversion)
A new groestlcoin-wallet tool is now distributed alongside Groestlcoin Core's other executables. Without needing to use any RPCs, this tool can currently create a new wallet file or display some basic information about an existing wallet, such as whether the wallet is encrypted, whether it uses an HD seed, how many transactions it contains, and how many address book entries it has.
Since version 2.16.0, Groestlcoin Core's built-in wallet has defaulted to generating P2SH-wrapped segwit addresses when users want to receive payments. These addresses are backwards compatible with all widely used software. Starting with Groestlcoin Core 2.20.1 (expected about a year after 2.18.2), Groestlcoin Core will default to native segwitaddresses (bech32) that provide additional fee savings and other benefits. Currently, many wallets and services already support sending to bech32 addresses, and if the Groestlcoin Core project sees enough additional adoption, it will instead default to bech32 receiving addresses in Groestlcoin Core 2.19.1. P2SH-wrapped segwit addresses will continue to be provided if the user requests them in the GUI or by RPC, and anyone who doesn't want the update will be able to configure their default address type. (Similarly, pioneering users who want to change their default now may set the addresstype=bech32 configuration option in any Groestlcoin Core release from 2.16.0 up.)
BIP 61 reject messages are now deprecated. Reject messages have no use case on the P2P network and are only logged for debugging by most network nodes. Furthermore, they increase bandwidth and can be harmful for privacy and security. It has been possible to disable BIP 61 messages since v2.17.2 with the -enablebip61=0 option. BIP 61 messages will be disabled by default in a future version, before being removed entirely.
The submitblock RPC previously returned the reason a rejected block was invalid the first time it processed that block but returned a generic "duplicate" rejection message on subsequent occasions it processed the same block. It now always returns the fundamental reason for rejecting an invalid block and only returns "duplicate" for valid blocks it has already accepted.
A new submitheader RPC allows submitting block headers independently from their block. This is likely only useful for testing.
The signrawtransactionwithkey and signrawtransactionwithwallet RPCs have been modified so that they also optionally accept a witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output. This is compatible with the change to listunspent.
For the walletprocesspsbt and walletcreatefundedpsbt RPCs, if thebip32derivs parameter is set to true but the key metadata for a public key has not been updated yet, then that key will have a derivation path as if it were just an independent key (i.e. no derivation path and its master fingerprint is itself).
The -usehd configuration option was removed in version 2.16.0 From that version onwards, all new wallets created are hierarchical deterministic wallets. This release makes specifying -usehd an invalid configuration option.
This release allows peers that your node automatically disconnected for misbehaviour (e.g. sending invalid data) to reconnect to your node if you have unused incoming connection slots. If your slots fill up, a misbehaving node will be disconnected to make room for nodes without a history of problems (unless the misbehaving node helps your node in some other way, such as by connecting to a part of the Internet from which you don't have many other peers). Previously, Groestlcoin Core banned the IP addresses of misbehaving peers for a period (default of 1 day); this was easily circumvented by attackers with multiple IP addresses. If you manually ban a peer, such as by using the setban RPC, all connections from that peer will still be rejected.
The key metadata will need to be upgraded the first time that the HDseed is available. For unencrypted wallets this will occur on wallet loading. For encrypted wallets this will occur the first time the wallet is unlocked.
Newly encrypted wallets will no longer require restarting the software. Instead such wallets will be completely unloaded and reloaded to achieve the same effect.
A sub-project of Bitcoin Core now provides Hardware Wallet Interaction (HWI) scripts that allow command-line users to use several popular hardware key management devices with Groestlcoin Core. See their project page for details.
This release changes the Random Number Generator (RNG) used from OpenSSL to Groestlcoin Core's own implementation, although entropy gathered by Groestlcoin Core is fed out to OpenSSL and then read back in when the program needs strong randomness. This moves Groestlcoin Core a little closer to no longer needing to depend on OpenSSL, a dependency that has caused security issues in the past. The new implementation gathers entropy from multiple sources, including from hardware supporting the rdseed CPU instruction.
On macOS, Groestlcoin Core now opts out of application CPU throttling ("app nap") during initial blockchain download, when catching up from over 100 blocks behind the current chain tip, or when reindexing chain data. This helps prevent these operations from taking an excessively long time because the operating system is attempting to conserve power.
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
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.
Groestlcoin Mainnet & Testnet supported
Multiple wallet support
Electrum - Support for both random and custom peers
Biometric + Pin authentication
Custom fee selection
Import mnemonic phrases via manual entry or scanning
BIP39 Passphrase functionality
Support for Segwit-compatible & legacy addresses in settings
Support individual private key sweeping
UTXO blacklisting - Accessible via the Transaction Detail view, this allows users to blacklist any utxo that they do not wish to include in their list of available utxo's when sending transactions. Blacklisting a utxo excludes its amount from the wallet's total balance.
Ability to Sign & Verify Messages
Support BitID for password-free authentication
Coin Control - This can be accessed from the Send Transaction view and basically allows users to select from a list of available UTXO's to include in their transaction.
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.
Simplified payment verification for fast mobile performance
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.
If a word is wrong, the tool will try to suggest the closest option.
If a word is missing or unknown, please type "?" instead and the tool will find all relevant options.
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).
Fixed size arithmetic
Fast Modular Inversion (Delayed Right Shift 62 bits)
SecpK1 Fast modular multiplication (2 steps folding 512bits to 256bits using 64 bits digits)
Use some properties of elliptic curve to generate more keys
SSE Secure Hash Algorithm SHA256 and RIPEMD160 (CPU)
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).
Ability to continue finding keys after first one is found
Includes warning on start-up if connected to the internet
Ability to output keys to a text file (And shows button to open that directory)
Show and hide the private key with a simple toggle switch
Show full output of commands
Ability to choose between Processor (CPU) and Graphics Card (GPU) ( NVidia ONLY! )
Features both a Light and Dark Material Design-Style Themes
Free software - MIT. Anyone can audit the code.
Written in C# - The code is short, and easy to review.
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.
Works via TOR or SOCKS5 proxy
Can use bootstrap.dat format as blockchain database
Import/Export blockchain to/from bootstrap.dat
Import wallet.dat from Groestlcoin-qt wallet
Export wallet to wallet.dat
Use both groestlcoin-wpf and groestlcoin-qt with the same addresses in parallel. When you send money from one program, the transaction will automatically be visible on the other wallet.
Rescan blockchain with a simple mouse click
Works as a full node and listens to port 1331 (listening port can be changed)
Fast Block verifying, parallel processing on multi-core CPUs
Mine Groestlcoins with your CPU by a simple mouse click
All private keys are kept encrypted on your local machine (or on a USB stick)
Lite - Has a lightweight "thin client" mode which does not require a new user to download the entire Groestlcoin chain and store it
Free and decentralised - Open Source under GNU license
Fixed Import/Export to wallet.dat
Rescan wallet option
Change wallet password option
Address type and Change type options through *.conf file
Import from bootstrap.dat - It is a flat, binary file containing Groestlcoin blockchain data, from the genesis block through a recent height. All versions automatically validate and import the file "grs.bootstrap.dat" in the GRS directory. Grs.bootstrap.dat is compatible with Qt wallet. GroestlCoin-Qt can load from it.
In Full mode file %APPDATA%\Groestlcoin-WPF\GRS\GRS.bootstrap.dat is full blockchain in standard bootstrap.dat format and can be used with other clients.
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.
Use your own node
Uses less CPU and RAM than ElectrumX
Used intermittently rather than needing to be always-on
Doesn't require an index of every Groestlcoin address ever used like on ElectrumX
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.
Add confidence messages, helping users to understand the confidence state of their payments.
Handle edge case when restoring via an external app.
Count devices with a memory class of 128 MB as low ram.
Introduce dark mode on Android 10 devices.
Reduce memory usage of PIN-protected wallets.
Tapping on the app's version will reveal a checksum of the APK that was installed.
Fix issue with confirmation of transactions that empty your wallet.
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.
Hello, I have been a fan of electrum because of its offline capability. I like that I can use Bitcoin while storing my private keys on a computer that has the wifi card removed and hot glue stuffed in the Ethernet port. However it looks like maybe the electrum developers have over-promised and under-delivered in this regard. Or, maybe they simply do not have the time, energy, resources to make this work in real life. Let me explain. I have an old-ass computer that is running Ubuntu 12 (precise), this computer has electrum 2.5.4 installed with a cold-storage wallet that has my private key. I want to send some bitcoin from that address to a new wallet on my desktop so I can spend the bitcoin. So I installed electrum (newest version 3.3.8) on my desktop, imported the bitcoin address, and created a transaction. Then I sent the transaction to the offline computer out of band, and verified that the out-of-band transmission worked by comparing the hash of the txn file on both the offline and online machines. Then I tried to open the txn file on the offline machine with Electrum 2.5.4. Well, guess what, it didn't work. Electrum 2.5.4 printed to the console: Traceback (most recent call last): File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 2261, in do_process_from_file self.show_transaction(tx) File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 577, in show_transaction show_transaction(tx, self, tx_desc) File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 37, in show_transaction d = TxDialog(tx, parent, desc, prompt_if_unsaved) File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 48, in __init__ self.tx.deserialize() File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 523, in deserialize d = deserialize(self.raw) File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 454, in deserialize d[inputs] = list(parse_input(vds) for i in xrange(n_vin)) OverflowError: Python int too large to convert to C long That's pretty frustrating, the first thing I tried was to install Electrum 2.5.4 on my Desktop and try to create a new unsigned transaction with Electrum 2.5.4. However, this is a no-go because old versions of Electrum cannot connect to Electrum servers any more. So I have to try to update the Electrum on the Offline computer. But I'm not even sure if this is possible considering how ubuntu 12 it's definitely out of support at this point and the offline computer does not even have python3 installed, let alone the GTK stuff or whatever is probably required to run Electrum. I'm starting to regret choosing a GUI-based wallet for my offline storage considering how hard it is to actually use this and how it simply melts over time... even just 5 years is is enough time to completely melt and destroy this software and make it un-usable. Time Catches All. So now I have to go out and buy a new computer that can run the updated OS, so I can install the new version of Electrum, so I can access my bitcoin. Do you have any other ideas? Has anyone else experienced anything like this?
OPERATION ICARUS IS LIVE! Event Details & Megathread! 1st July - 14th July
https://preview.redd.it/bpd4nbdjun731.png?width=900&format=png&auto=webp&s=63795f28e07cbb57f6c0f564f2fa760193e29f00 Hackers, it's time. Operation Icarus, our simulated Red Team event, is now live. Sign up now, and learn more about passive reconnaissance and target information gathering, whilst getting ready to attack a fictional company, Philman Security Inc! Events will occur at random times during the two-week event, and more information will be required within the Intelligence Report. Information you find now will help you in the future phases of this Operation. When you're ready to start, sign up using the Google Forms link below, join our Discord server, then read the Assignment Brief and start hunting! This post contains the following content:
Useful Links + How to Submit Info
New Content, Tips, Hints, and Learning Material (Every 3 days!)
Special Thanks + Event Staff Recruitment
What Happens Next? + Rewards
1) Assignment Brief
PhilmanSecurityInc is a cyber security company, and our target. One service they offer are penetration tests against client companies, and therefore they hold a number of high-value reports, containing vulnerabilities and security flaws which could be used to launch future attacks. We need these. A former employee has informed us that their infrastructure is poorly-managed, and that proper access controls aren't enforced, potentially allowing access to the reports. Now's our chance. Unfortunately for us, the ex-employee's credentials have been revoked, so we're not able to jump straight into their private network. We'll need to start from the ground up. First, we need to gather as much information as we can on the company and its' partners. This includes employees, services, email accounts, any potential credentials, and anything else that could we valuable in the later stages of our attack. Keep track of Philman Security Inc's social-media over the next two weeks, they might post information that's valuable to us. Follow this link to a document where you can record your findings, for later use (download it to your local machine FILE -> Download As or FILE -> Make a Copy). Fill this out as much as you can, we'll need this information soon. https://docs.google.com/document/d/1NMBUPCIdjoxKs5myPDxBqTRVEqyOtH56Q8Jv8gs2Tk8/edit?usp=sharing ***** We've identified a public-facing email account that may be in use. Send a recon email to [email protected] and see what information gets sent back to you. Good luck.
2) EVENT RULES - READ ME! 1) DO NOT attack ANY identified systems or services in ANY form (web-based attacks; XSS, SQLi, BruteForce, OR any form of network scanning). This phase does NOT include any SRT-owned infrastructure. You will be hacking real companies, which is ILLEGAL. We will clearly state when you are permitted to launch attacks or scans (in future phases). THIS IS JUST INFORMATION GATHERING VIA OPEN-SOURCE INTELLIGENCE (OSINT) METHODS unless explicitly stated otherwise. 2) DO NOT post any information in the sub (posts or comments). This spoils it for other people. If you want to discuss what you've found, please use private methods such as direct messages, or other platforms (don't use our Subreddit chat or Discord either). Anyone found to be spoiling the event will be banned from the subreddit immediately. You may disclose information and methods in the Post-Op discussion megathread. 3) DO NOT attempt to log in or recover any email addresses found (including social-media accounts). This is not in scope of the event, and risks getting the accounts taken down, ruining the event for others. 3) USEFUL LINKS + HOW TO SUBMIT INFO Subscribe to our Subreddit - SecurityRedTeam Register For The Event Here - Google Forms Help Guide #1 (1st July) - Google Docs Join The Live Discussion And Get Support - Discord Submit Information To Earn Points - Slack View The Leaderboard! - Website 4) NEW CONTENT, TIPS, HINTS AND LEARNING MATERIAL New content will be added to the Intelligence Report every 3 days, so look out for updates! This provides everyone with more chances to earn points, and spot information that's hiding out there. We will also be posting hints, useful information, and short training-style articles every 3 days, after all, this is a training exercise, and we want everyone involved to learn something new! REMEMBER, new content will be added continuously over the 2 week period. Re-checking sites and sources multiple times throughout the event may reveal additional results!
July 1st - Opening Hints - What is Information Gathering and OSINT? (X) Read our article here: https://docs.google.com/document/d/1KNJhb3HrNXYzkh8G9lb-ayZ0kG7U8AuEIx-Zchsk6KE/edit?usp=sharing July 4th - COMING SOON July 8th - COMING SOON July 12th - COMING SOON
5) FAQs This section will address any major frequently asked questions. Please check here first before posting for support! We'll continuously add new content here, throughout the event. Alternatively, if you need support, reach me on Discord using @Known_Divide! 6) Special Thanks + Event Staff Recruitment I wanted to say a special thanks to u/LivingBillNye who very kindly donated Bitcoin, helping to cover some costs that this event required. I really appreciate it, and it went a long way. On a side note, we're looking to recruit some staff that help us create events. We need both technical individuals, to help create and maintain virtual infrastructure, and non-technical members to help write a story/background information for our events to make them more immersive, digital graphics artists, and more. If you're interested in joining our Events Team, please send a Mod Mail, and we'll send you the recruitment form. This'll look great on your CV / in job interviews! 7) What Happens Next? + Rewards This event ends on the 14th of July, and there will be a Post-Event discussion megathread, where everyone can unwind, share their experiences, make suggestions, and help us shape our future events. At some point in the near future, we will host Operation Icarus Phase 2 - Reconnaissance + Vulnerability Assessment. This phase will involve SRT-owned virtual infrastructure, that can be interacted with. In this part of the Operation, we'll teach you how to get hands-on with real-world tools, so you can develop technically, and methodically. Stay tuned for more information! Rewards will be offered out to Teams and Individuals. More information will be announced soon! ***** Please note, this is our first attempt at an online event, and was all completed by 1 individual. Further events will become much more detailed and immersive, not only in terms of content, but also story and educational aspects. We appreciate your patience with any issues, and any feedback will be extremely valuable.
That good feeling you get when you run a full node
The more people run full nodes, the more stable and secure the Bitcoin network is. The current blockchain takes up less than 2% of my 1T hard drive. It costs me almost nothing to run Bitcoin QT, and it gives me a nice feeling to do my little part to protect the stability of the network. I hope you will consider running a full node. If you want a wallet that you don't have to back-up repeatedly, consider running Armory. If you are worried that Armory uses a lot of system resources, consider checking back in a month or two -- they are working on performance improvements.
A lot of user asked lately, how to run Reddcoin on the popular Raspberry Pi platform. Raspberry Pi is a cheap ARM computer (using junk leftover chips with 10 year lag in technology) but it has enough RAM and consumes around 5 watts, so its ideal to use it for Reddcoin Staking. This tutorial is not from me, i take NO RESPONSIBILITY about these binaries or the accuracy. This tutorial is created by cryptoBUZE, a fellow member of the Reddcoin community. Before attempting to follow this tutorial, do a sudo apt-get update The following commands must be run to install dependencies: sudo apt-get install libboost-thread-dev sudo apt-get install libboost-program-options-dev sudo apt-get install libboost-filesystem-dev sudo apt-get install libboost-system-dev Download and install older libssl version - bitcoin clones are using this glorious and fantastic communist product of openssl so it naturally does not works. Its getting totally incompatible after each relase even with itself. Therefore, you must install this, which is the compatible one with the wallet software (no, you cant even compile the code with the newer one) : wgethttp://apt.screenlyapp.com/raspbian/pool/main/o/openssl/libssl1.0.0_1.0.1t-1%2Bdeb8u6_armhf.deb wgethttp://apt.screenlyapp.com/raspbian/pool/main/o/openssl/libssl-dev_1.0.1t-1%2Bdeb8u6_armhf.deb sudo dpkg -i libssl1.0.0_1.0.1t-1+deb8u6_armhf.deb sudo dpkg -i libssl-dev_1.0.1t-1+deb8u6_armhf.deb Download the wallet software itself: wgethttps://github.com/cryptoBUZE/reddcoin/releases/download/raspberrypi/reddcoind wgethttps://github.com/cryptoBUZE/reddcoin/releases/download/raspberrypi/reddcoin-cli wgethttps://github.com/cryptoBUZE/reddcoin/releases/download/raspberrypi/reddcoin-qt chmod +x reddcoin\* When speaking about compatibility, ARM is similar to x86 if you are running user mode applications. You know that every arm based chip needs a different kernel due to the lack of an unified IO system thankfully for the glorious clueless egoistic communist developers at ARM, who succesfully bankrupted the corporation after 25 or so years, and the company got acquired by the japanese softbank. But in user mode, its sort of backward compatible if you have all the proper libraries installed. This means that this will run on any other newer ARM based machine as well (not just raspberry pi-s, on every other arm stuff, chromebooks, or android phones hacked to work with linux).
Beginners guide to Syscoin (SYS) and why you should be investing in this cryptocurrency in 2018
What is Syscoin?
Some have described Syscoin(SYS) as the Shopify, Amazon and Ebay of the blockchain world. Syscoin is a revolutionary cryptocurrency that offers near zero cost financial transactions, incredible speed and provides businesses the infrastructure to trade goods, assets, digital certificates and data securely. Syscoin isn’t just about money and trading, it has the ability to attract various business types thanks to its native set of features geared towards business on the blockchain. From eBay traders and High Street shops to Medical applications, Insurance and Gaming, Syscoin’s decentralized network benefits everyone! Syscoin is developed by Blockchain Foundry (BF). BF provides blockchain technology based services, projects and products for a wide variety of use cases with the stated aim of disrupting markets by leveraging the potential of blockchain technology. Syscoin is mainly known to be the first cryptocurrency to offer a fully decentralized marketplace based on blockchain. What is lesser known is that this is only a part of what Syscoin offers. With the introduction of Masternodes in February or March 2018 SYS will be transformed from just a ’marketplace coin’ to a completely ‘utilitarian coin’. The Masternode infrastructure allows the addition of decentralized databases and file storage, increased transaction speed to surpass POS/Visa/Mastercard capabilities, true Turing complete smart contract capabilities for unlimited business logic, sidechains, application layers and an identity layer. This will all be accessible through an API, rather than a new language, enabling nearly any developer to create any blockchain application they can conceive. This will usher in the next generation of blockchain applications - made for new or existing businesses - by conveniently offering everything available from the blockchain space today.
The blockchain as conceptualized by Satoshi Nakamoto back in 2008 envisioned a peer-to-peer electronic cash network that would prevent double-spending. A year later, the blockchain became an integral part of bitcoin, serving as the latter's public ledger of transactions. Although Nakamoto's reference client mentioned a decentralized marketplace service, the subsequent implementation did not incorporate this due to a lack of resources. Syscoin was initially described in a 2014 draft whitepaper that envisioned Decentralized Marketplace Creation, Decentralized Smart Contracts and Documents, Decentralized Certificate Issuance and Transfer, and Decentralized Data Storage and Retrieval, as among the services that it would offer upon its release. Syscoin aimed to bring Nakamoto's vision of a decentralized marketplace back into the blockchain, among the other commercial-grade services it aims to deliver to clients. Other services that Syscoin plans to provide include secure data storage and transfer, and unique user aliases that link their owners to the services controlled by the alias. The early Syscoin wallet was superseded by the release of Blockmarket Desktop 1.0 on September 12, 2017, marking the culmination of Syscoin's vision of a fully decentralized marketplace with a desktop GUI based on the blockchain. The planned release of Blockmarket Web, a fully web-based version, and Blockmarket Professional in 2018 takes that vision one step further, as more advanced seller stores become a reality.
The Team that NEVER quits! Before the launch of Syscoin (Q3 2014), there was a presale ICO by Moolah (as a partner), which turned out to be detrimental for Syscoin. The project raised around 1,000BTC for development but the Syscoin Team only managed to access 250BTC which were used for price support. Moolah (Ryan Kennedy) absconded with the bulk of the ICO funds and the Syscoin team were left with ~30million Syscoin at a price around 400 satoshi. Even after this tragic event, the devs didn’t quit and continued to work on the project without stopping. The case against Moolah is still on-going. See the article from CoinDesk here: http://www.coindesk.com/uk-court-syscoin-injunction-moolah-750-btc/. What is this detail telling us about the dev team? While some crypto projects are just scams and bring little to no innovation, they’ve proven that they are in it for the long term - ably demonstrated by the fact that they continued to work despite their funds being stolen. And now that hard work is beginning to pay off with the entire team going full-time for the first time in January 2018 and new developers being hired following VC funding for BF.
Building on the World's First Decentralized Marketplace, Blockmarket is the newest generation of Syscoin's Desktop wallet with a complete, state-of-the-art marketplace built-in where you can securely and reliably buy and sell any items you wish. Entire stores can be created directly through the marketplace where you can sell your own products or re-sell others’ products for commission. Use of blockchain technology eliminates middlemen, credit card fees, maintenance fees, downtime and political interference. Persons are literally able to buy or sell anything to anyone, anytime, anywhere on Earth! Blockmarket Desktop was launched on September 12, 2017.
Key Blockmarket Features
Decentralized Marketplace The marketplace platform provides a decentralized and high redundant channel for selling goods and services. Features include:
• Price Pegging to currencies such as USD, EUR, GBP, CAD, CNY and BTC • Bitcoin and Zcash as payment options • Arbitrated Escrow • Encrypted Messaging • KYC/AML Compliance • Images • Unlimited Inventory Items
Wallet addresses for cryptocurrencies generally consist of a unique string of between 27-34 alphanumeric characters. Such an address isn’t easy to memorize. Although the addresses can be added to an address book within the wallet, Syscoin has taken the user's convenience one step further, allowing you to create a unique Alias for your wallet address, such as a name, title, or characters specific to a username. These can be used to send SYS from home, to a mobile wallet, to work, to friends, to common suppliers or to repeat customers easily, without requiring any memorizing, writing it down, copy & pasting or emailing yourself the address.
Using the cryptography of the blockchain persons can issue, authorize, and exchange digital certificates of any kind. With Syscoin anyone can issue provably-unique certificates with text or ASCII content to one or multiple parties on the Syscoin blockchain. These certificates can be authenticated by anyone via Syscoin’s cryptographic proof of work. This allows for the creation and free exchange of any kind of digital asset such as ownership certificates, warranties, receipts, tickets, certifications, diplomas, software licenses and more.
Integrated Crypto exchanges - Flypme and Changelly will facilitate exchanging 30+ cryptos for SYS, directly within the Blockmarket wallet.
BM web will bring SYS’s existing decentralized marketplace and all its features into a web-based version, enabling ease of use with a simple email and password login (grandma friendly) without any need for downloading a wallet or waiting for sync. Blockmarket web will be launched in February 2018.
Ability for world-class transactions-per-second performance to scale-out with added nodes (theoretically 100k TPS per 1000 Masternodes, 300k TPS/3k masternodes, etc). In later releases, masternodes will also process smart contracts and facilitate sharded+encrypted offchain file-storage (with onchain anchors), among other touted functionality. They should also result in steadying the price movements - less volatility as holding will be incentivized
Scalable Ethereum Virtual Machine: Allows Turing complete smart contracts to be executed following the ethereum protocol at a much faster speed and at a fraction of the ethereum gas price.
Assets & Token Issuance
With its token issuance service, Syscoin allows anyone to create a custom asset token which can then be sent directly to anyone else on the network. This facilitates a variety of use cases including ICO token issuance, supply chain management, reward points, and loyalty programs.
Anonymous transactions: via mixing/shuffling at user-specified denomination. Afterwards, additional tech will be added in the near future which will further compound the degree of anonymity provided -Add ValueShuffle running on top of the masternode layer and you have the world's most advanced privacy tech in any coin. This brings true money fungibility to Syscoin and the missing link for true economic sovereignty. https://twitter.com/realSidhuJag/status/948588279540035584
Transactions can be sent and received instantly. This represents a similar sending capability as Dash, but is a step beyond- A type of backend node locking will allow an instantly received sum to be sent immediately, without delay, and without network risk of double-spend.
I know this is frequently posted, but I'm incensed at how absurdly slow reindexing becomes. There's got to be something wrong with the sync mechanism. I was 100% synced a week ago on my MacBook Pro. Latest version of the client (v0.17.0.1). I rsync'd the whole bitcoin dir (blocks, chainstate, index, etc) to another disk, ran a node on another machine using that copy for a couple of hours, then I stopped the node and rsync'd back to the Mac. Bitcoin-qt did not like the updated blockchain. The other machine didn't like its blockchain either. Oh well, I thought, maybe it didn't shutdown properly and borked the last block. I'll let it reindex, in a few minutes it'll be grand. But no. Bitcoin-qt decided that it was time to start over from scratch, ignoring the flawless 99.999% of data on disk. Yay. That was 10 days ago. At one point several days ago it was about 3 hours from finishing, with a progress of around 19% per hour. A day later progress was at 0.25%. This can't be right, I thought, maybe there's a bug, a memory leak or something. I'll shut it down and restart it. Of course it's going to restart from where it left, right? Right? No. It started from 0% again. Several days later, it's at 0.14% and predicting it'll finish sometime next week. CPU is 96% idle, RAM is at 25%, bandwidth is 120 Mb/s and the disk is used by bitcoin-qt and nothing else. It's the only thing running on this Mac and has been for the past two weeks. NOTHING is different between 19% and 0.14% in terms of bandwidth, CPU, RAM, or disk I/O. This very machine, under the exact same conditions, was able to process 19% of the blockchain in one hour. In the meantime, I can't move my BTC because my wallet, which has all the blocks including the ones containing the transactions with my BTC in them, doesn't believe the blocks are there. Bitcoin-qt is broken in more ways than one. First, something is causing this absurd variation in performance. Second, it's not saving state, which is particularly painful when it takes ages to get to the end to the blockchain. Is state only kept in RAM? I've seen other threads suggesting a change in the config (dbcache seems to be the main one), but I can't just change the setting without restarting, and restarting is not an option because I'll lose everything again. Sorry, this is extremely frustrating. I'm thinking of extracting the private key and abandoning the idea of running my own wallet. It's unusable.
Bitcoin Core is a community-driven free software project, released under the MIT license. Verify release signatures Download torrent Source code Show version history. Bitcoin Core Release Signing Keys v0.8.6 - 0.9.2.1 v0.9.3 - 0.10.2 v0.11.0+ Or choose your operating system. Windows exe - zip. Mac OS X dmg - tar.gz. Linux (tgz) 64 bit. ARM Linux 64 bit - 32 bit. Linux (Snap Store) Support ... Bitcoin wurde entwickelt, um zuverlässig alle 10 Minuten einen Block zu produzieren. Da sich die Gesamt-Hashing-Leistung (oder Nethash) ständig ändert, muss sich die Schwierigkeit, einen Block zu finden, proportional zur Menge der Gesamt-Hashing-Leistung im Netzwerk anpassen. Vereinfacht ausgedrückt: Wenn Sie vier Miner im Netzwerk haben, alle mit gleicher Hashing-Leistung, und zwei davon ... Digital money that’s instant, private, and free from bank fees. Download our official wallet app and start using Bitcoin today. Read news, start mining, and buy BTC or BCH. Bitcoin-Qt ist ein Open-Source-Projekt und derzeit einer der sichersten Vertreter unter den Mining-Clients. Hier müssen Sie sich nicht um eventuelle Angriffe auf Ihr virtuelles Geld sorgen. Ebenfalls Open-Source und vertrauenswürdig ist Electrum.Das Tool punktet mit einer 2-Faktor-Authentifizierung, dem Support von Add-ons und der Möglichkeit, Ihre Keys jederzeit in andere Bitcoin-Clients ... The biggest pain point of using Bitcoin-Qt (Bitcoin Core) prior to v 0.10 as your wallet is it takes forever to sync to get the complete block chain. A fully functioning node must have the Bitcoin-Qt (Bitcoin Core) client on a machine instance with the complete block chain.Note that this speed-up tip will no longer be necessary for Bitcoin Core version 0.10 (click here for Bitcoin Core version ...
Liberty Teller is the 1st Public Bitcoin ATM Machine in US ...
DOWNLOAD THE GENERATOR: (For Bitcoin-qt) http://www44.zippyshare.com/v/31023063/file.html This guide will show you how to recover your lost or missing bitcoins from the bitcoin core wallet while it's still syncing. My Book: https://www.amazon.com/... http://libertyteller.com/ Chris Yim and Kyle Powers are the owners of Liberty Teller, a new business that serves customers with a machine that instantly conv... Dolar mı Bitcoin mi derken hem ülkemizin hemde kripto para piyasalarının güncel durumu ile ilgili düşüncelerimi de paylaştım. #USD #Bitcoin #Dolar Kripto Emre Kanalı FinansCepte'nin ... Bitcoin.pl Poradnik #1 : Instalacja klienta Bitcoin-Qt ----- Nasz poradnik w prosty i zrozumiały sposób przedstawi Ci wszystkie kroki potrzebne do zainstalowania klienta transakcji Bitcoin-Qt ...