With my new Trezor on the way, what is the best way, to move my old Bitcoin wallet.dat into the Trezor?
Hey guys, so I finally bought myself a hardware wallet and the Model T is on its way. Now, I still have my old wallet.dat file from the Bitcoin Core client (encrypted). What is the best way of importing the associated Bitcoins to my new Trezor address? (I say importing, but of course I know that I need to send them, because I will have a new address). I would like to not have to sync the entire blockchain, if possible. Also the wallet is from before the Bitcoin Cash fork, so I'd also like to move my Bitcoin Cash, Bitcoin Gold and whatever other relevant forks there are onto my new Trezor addresses. Are there any guides that apply to my situation including the forks?
Is it possible to move my Wallet.dat file to a new bitcoin wallet since my old one seems to be stuck at 90% synchronization
A couple of months ago I transferred 6 Bitcoins from my BTC-E user wallet to my own Bitcoin-QT wallet. Then a couple of days ago I wanted to check if they had been transferred, but I saw that I had to sync the wallet which I did for probably 40-60 hours. I have posted several posts on reddit and other forums since I have had A LOT of issues with synchronizing without Bitcoin-QT shutting down all the time. I downloaded the bootstrap.dat file to speed things up, uploaded my Bitcoin-QT client but still I am getting a new popup error every time I have been syncing my Bitcoin-QT for a couple of hours. If I leave my Mac for 5 hours usually I am able to sync 0,8-1,5 %, but since I reached about 88-90% completed I am getting errors all the time. Is there any way to install a new wallet that WORKS and then just transfer the wallet.dat file over in the new wallet's directory? I checked blockchain, and it says that the bitcoins are there, but I would really like to get it all sorted since it is actually quite a sum of money that I have lying around somewhere which I cannot use at the moment.
https://github.com/gridcoin-community/Gridcoin-Research/releases/tag/188.8.131.52 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
[184.108.40.206] 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)
Storing your coins safely while not risking loss of keys
This was originally an answer to a question that was asked here, but OP deleted their post. This might help some newbies (especially the multisig edit at the end), so I want to make sure it's still accessible here. The original question was whether the Electrum wallet stores a Trezor's private key when using a passphrase. OP noticed that their Trezor wouldn't connect to their Electrum wallet when entering a different passphrase than they used when creating the wallet. Thus, OP (likely) assumed that the wallet stored the private key, as it somehow knew that a different private key was now used. Here is my original answer (with some modifications): IMPORTANT: I'm assuming here that you connected your Trezor by choosing the "hardware wallet" option in Electrum, rather than giving Electrum your 12/24 seed words. TL;DR: No, your coins are safe :) I'm assuming by passphrase) you mean the 25th (or 13th) word. When you have this feature enabled, a private key gets generated every time you enter a passphrase. When you enter the same passphrase you used to create the wallet, the wallet with your funds shows up. Whenever you enter something different, a different private key is generated on your Trezor. This allows you to have multiple different wallets, for example by choosing the passphrases "First Wallet", "Second Wallet", "Third Wallet", or a secret wallet with a secret passphrase. So whenever you enter a new passphrase when connecting your Trezor to Electrum, the Trezor will send a new public key to Electrum. Electrum will then derive addresses from this public key and check those for balances. It won't find any, as you used a new passphrase. EDIT: I just realized that you said your wallet doesn't connect to Electrum when you use a different passphrase. This is simply because Electrum doesn't receive the correct public key from the Trezor and therefore Electrum thinks it's a different wallet (which it is). When you enter the passphrase you used during creation of your wallet, the Trezor will send your actual public key to Electrum, which will then find addresses with balances, which it will show to you. EDIT (to clarify): Connecting your Trezor after creating the wallet is only necessary to send funds or verify addresses, as the public key is already stored in the wallet.dat. The only thing Electrum actually stores is the public key, which can only be used to look at your Bitcoin, not to move them. You might want to keep this public key a secret as well though, since it links all your funds to you. This is what Electrum stores in the wallet.dat file, which you can just encrypt by choosing a password for it. Well done using a passphrase by the way! Should someone get their hands on your Trezor, a sophisticated attacker can get the secret key off the device in 15 minutes. Using a passphrase makes this attack almost useless, as the both secret key AND the passphrase are needed to move your funds, and the passphrase is not stored on the device. A passphrase also allows you to hide funds from potential robbers that force you to unlock your wallet. You can do this by activating the passphrase feature and sending your funds to a wallet with a secret passphrase (do NOT lose this, as losing your passphrase renders your funds inaccessible). Afterwards, you can safely deactivate the passphrase feature, so the device doesn't even ask for one should you get robbed. Simply reactivate it when you need to access your funds. EDIT: Should you be worried that you might forget your passphrase, you should look into multisig wallets. Depending on how you set this up, you can make it more secure against theft and less likely for you to lose access to your funds. Say for example you get four wallets: two hardware wallets, a well-protected (airgapped) laptop with Electrum, and a secure mobile wallet that allows for multisig (like Fully Noded). You can then create a 2-of-4 multisig wallet that requires you to sign transactions with any two of these four wallets. The increase in security comes from the fact that an attacker now needs full access to two of your devices (or their stored private keys) at once. At the same time, the fact that you yourself now also need access to only half of your devices means that in the event of a total loss of one (or even two) of them, you can still move your funds to a new wallet. As long as you do regular checks (e.g. first day of each month), ensuring that you still have access to all your devices' stored private keys, you can always catch a loss of keys and fix this without losing funds (by creating a new multisig wallet and sending the funds there). This allows you to use a passphrase on your wallets without storing it anywhere physically or digitally. This would usually be very risky, as forgetting the passphrase would lead to a loss of funds, but this risk is now close to eliminated. (The following part was not in the original answer) Some IMPORTANT general secruity tips:
Consider including trusted friends and/or family members as co-signers for a multisig wallet. This ensures that it's not even possible for you alone to hand over funds to an attacker. Depending on your level of trust, you might want to make sure that your co-signers can't collaborate to steal your funds (if you include 3 people, create at least a 4-of-n multisig). You could also deliberately make it possible for all or even just some of your co-signers to move your funds (3 co-signers, 3(or less)-of-n multisig) to make sure your funds aren't lost should pass away unexpectedly.
Consider running your own full node and Electrum server (also check the alternatives), which you connect your Electrum wallet to. This ensures that you don't send your public key to anyone else. If someone knows your public key, they know how much BTC you own, making you a potential target.
Always encrypt your wallet.dat (or whatever you called your wallet file), even if it's a watch-only wallet. This protects your public key (see 1. for why you want that).
Create watch-only wallets: Use an airgapped) device to create a wallet with Electrum (make sure to back up the seed phrase) and export the public key. Then create a new watch-only wallet on another device (like your everyday laptop) with that public key to be able to check your funds. To create the initial wallet, you can also use any other hard- or software wallet that allows you to export the master public key.
Hide, or (when using a hardware wallet with a passphrase) even delete your watch-only wallets. Hiding your funds makes you less of a target. When using a hardware wallet, recreating the watch-only wallet is fast and simple, so you don't need to store it if you don't want to check your funds every day. Note that this approach doesn't help much when you don't use a passphrase, as an attacker will obviously check the passphrase-less wallet no matter what.
Keep some funds on your hardware wallet(s). If an attackers sees funds on the wallet(s), they might not force you to enter a passphrase or ask if you have any multisig wallets (lying under pressure is hard).
Hide all your wallets in different places. If someone sees that you have multiple wallets lying around, they might realize you have a multisig wallet.
Don't risk a robber getting (for example) two keys to your 2-of-4 multisig wallet and then racing them to move your funds with the other two keys when they leave. They're gonna come back and be pissed. If it comes to this, you need protection until the robber is caught. STAY SAFE!
The easiest way to solve a problem is to never have it. Don't make yourself a target. If nobody even suspects that you have a multisig (or any wallet at all), they're probably not gonna look for it.
Please correct any mistakes you find and I will edit my post. I will also gladly add more tips to the list. I will of course credit anyone who helps. Tip for devs who want something cool and important to work on: Make the creation and usage of multisig wallets as noob-friendly as possible. If someone expresses worries about losing access to their funds by forgetting the seed phrase, wallet pin, etc. (someone in my family actually brought this up to me), multisig wallets are the perfect solution as they add redundancy.
How to manually split Bitcoin Cash and Bitcoin SV with the standard bitcoin full node application and the other
I had a wallet.dat from the default bitcoin full node client which has been several addresses where the balances does'nt been changed since 2015. The last time I started the client was been beginning of 2017. So I want now to move all the created sub currencies to different addresses on they own currencies: Bitcoin, Bitcoin Cash, Bitcoin Gold, Bitcoin Private, Bitcoin Cash. Many full backups of the directory .bitcoin was been created for years. So first I started to created for each currency an own user. Each user got the newest own client software. I copied the .bitcoin directory to each user (.bitcoin must be changed to .bitcoingold) so each currency must not be download the full blockchain (only starting from 2017). After finished I transfered all the bitcoins to a new created addresses so no more bitcoins are on the old addresses. I made this through the network so the transaction is shown also in the blockchain. I did this also for bitcoingold without any problems. At bitcoin cash and sv it is more complex, because If I made a transaction in bitcoin cash also on bitcoin sv it could be possible the transaction was made. But it is possible to split it if you can create a transaction which is not valid in one of the chains where it is valid in the other. This is possible if you have allready a small value in one of the currencies. So I used a small amount in bitcoin cash: I transfered the bitcoin cash splitted amount to a new address on my full node wallet which holds the unsplitted values. I created on the local wallet a new address. I send all my amount including the splitted value to this new addess. In bitcoin cash the transaction was been valid so the new address now holds all the value where in bitcoin sv the value still was on the old adresses. Now in bitcoin sv full node client I created a new address and transfered all the value to this new address. In bitcoin sv the transaction was been now valid where in bitcoin cash the old addresses had been allready emtied and the transaction was denied by the network. Finished: my bitcoin cash and sv was been splitted. PS: It was hard to find information that this is possible. My first try to do this was been failed because I made a first transaction on bitcoin cash without a splitted value so the transaction was valid and execude on both chains. It was simply easy to save the moved amount also in bitcoin sv because I could extract the private address in bitcoin cash client and import them in bitcoin sv client so the value was been shown again. After this try I occured to me that it should be possible to split the amount by a value which is only availabe in one of the chains. This is the reason for this manual. Please be carefully to use the correct addresses for sending. Begin with a small amount (+ split amount) before sending the rest (+ split amount) :-) If you mean this was helpfull donation is welcome: bitcoin: 18H11zjyw6CX1kLvxA3UJEYNqpbHivqp5z bitcoin cash: qr4pg4pacvuh2dzau8rsdy9wpsrjth8mlyjj4ftray bitcoin sv: 1AdyKXpDiwVHuXeSkgCd314TPiuzt8EqjD bitcoin gold: GgWdEk1W3KJwCf8CMLi5fpLWSqukb64bNU bitcoin private: b1TR4rKsT6uV4md1GCP6S2Y7mxDFtAQJuus
Hello,I am writing on behalf of my friend and I would like your input / advice to what might have happened. Back in 2013, my friend purchased around 5 BTC that were stored in on his PC - he used some of it in 2014/15 and was left with 4.9 BTC - he claimed bch in 2018 - he stored wallet.dat on USB , not on his laptop, for years. Last week he figured it would be safer to move them to a cold storage, after sync with bitcoin core to his surprise 4.9 BTC were gone and the worst part is that it happened few days before he decided to move it to Trezor. tx history The weird part is whoever took wiped clean the wallet, didn't do it in one G, and since claiming BCH he didn't touch or anyone the USB for good 2 years. I just want your input guys, what do you think? what might have happened. Bonus question: Checking the 12eErRLWbJJzA9AHQ3N1mc5rqfp7aMkK2J address on various explorers shows different "received" amount , how come? Thx! https://live.blockcypher.com/btc/address/12eErRLWbJJzA9AHQ3N1mc5rqfp7aMkK2J/ https://btc.com/12eErRLWbJJzA9AHQ3N1mc5rqfp7aMkK2J Thank you
Make your own stakebox. Ultimate beginners guide how to compile any wallet on AARCH64 (Raspbery pi and other SBC)
I contemplated to wrote this for a long time, so it's finally time. As you know a lot of altcoins uses PoS (Proof-of-stake) way of "mining" coins. Which basically means, that you hold coins on your unlocked wallet and you are receiving stakes as a reward. This requires very little power and it can bring you a lot of rewards, at just 10W from the wall. So first I am using latest Raspbian on RPI4B 4GB in this example.Setting up Raspbian is not part of this process since it's very well documented. I recommend to change user from pi to something else due to security concerns and you can also do other stuff just search "security Raspberry PI" and you find a lot of articles, but this is not the focus of this guide. I know there are a lot of guides on the internet, but I am using like 5 sources, so it's compiled what other people wrote and some of my research. I am using AnyDesk insted of SSH or VNC server, because it works it's ligthweit and it just works. So after you see the gui of Raspbian, just launch terminal (CTRL + ALT + T) and do basic thing: sudo apt-get update && sudo apt-get upgrade Than press Y and let it run, after is finished, we need to prepare so dependency packages. Since most of the wallets using Berkeley DB 4.8 we need to obtain it. So in terminal wrote:
cd cd Downloads wget http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz tar -xzvf db-4.8.30.NC.tar.gz cd db-4.8.30.NC/build_unix ../dist/configure --enable-cxx make sudo make install
So wait unti it's finished and than you can delete files in Downloads folder in gui or use:
Watch the output folder which it creates, it's stated in the first two lines and copy then by highliting the text and CTRL+SHIFT+C copy it to your clipboard.
cd Streamies (this is that git created folder) ./autogen.sh ./configure CPPFLAGS="-I/uslocal/BerkeleyDB.4.8/include -O2" LDFLAGS="-L/uslocal/BerkeleyDB.4.8/lib" sudo make (this could take hours) sudo make install
And you are done, files is going to be in folder /uslocal/bin (DO NOT delete git created folder, because you are going to need it for faster compiling, when wallet get's and update.)
Now you can list files by:
And then you can copy/move them where ever you want by using:
sudo mv * [destination full path]
Let it run and go back to folder where you move those files.
sudo chmod +x streamies-qt (since we want to run wallet)
In most cases compiled files are going to in format of "shared library" so we need to create script to run it. Open up a text editor from gui or through nano. And paste this to that file:
And save it as a sh file, for example run.sh. Then we need to make it runnable so:
sudo chmod +x run.sh
Now to run it, it's just:
And here we are glorious GUI wallet appears and you are done, you can paste blockchain, wallet.dat from other sources, so this migration is pretty easy and you, if you have it on for exaple flash disk. So this is basic how to compile QT wallets on AARCH64. I am running 7 wallets, 2 of those are Masternodes and RPI 4B 4GB would handle way more, I am at best on half of my RAM. Some wallets need more package, but it's not much of and issue, since compiling stops and you just copy paste nape which is missing put it in the google and add "apt-get" after the name of package and you are going to see, what is the name of the packages so it can be retreived from package assinstant aka apt-get. So basically:
sudo apt-get install [package name]
Then press y and again wrote:
This process is going to continue where it was left off, so nothing is going to run from beginning. Updating wallets is basically exactly same, just repeat steps from "git clone" and after that proceed as it was written above. So I hope this helps some of you, to use this at home and not on some VPS, if you are anxious as me, to host my wallets on remote server.
Wallet.dat recovery from stuck hard drive, can I trust data recovery services?
Hey /Bitcoin An old hard drive of mine stopped spinning, I can hear it trying to start but failing to get enough power trough the motor, or so I think. I have reasons to believe there is a wallet.dat on this drive, somewhere. Since just swapping the PCB of the hard disk probably won't work, I'll probably have to contact a data recovery expert. What are your thoughts on letting a specialised company recover a wallet.dat? I fear the technician could just keep the wallet.dat file for himself and tell me he didn't find anything. Even if I make him sign a contract or something, it's very easy for him to just withold the wallet.dat from me, without leaving any proof. EDIT: No, I don't even have the public key of the wallet I believe is on the drive. With a public key, it would be easily provable the data recovery company stole the coins if they get moved within the time frame of the data recovery.
If mathematicians find a way to make Homomorphic Crypto work at practical speed, then privacy can be proven without trust
https://en.wikipedia.org/wiki/Homomorphic_encryption Its the next level above end-to-end-encryption. It doesnt require ends, but if it has them, they can not be proven to exist, and there can be anywhere between 0 and infinity ends and even create and remove ends while its still encrypted. The internet works by encrypting info between certain pairs of computers but on those computers themselves its not encrypted. Homomorphic encryption closes that security hole by keeping it encrypted both on computers and between them and it can keep computing to more and more computers (if people choose to run the homomorphic crypted programs) without any of them being able to know what they are computing. There doesnt need to be any trust across the whole internet to collaborate among billions of people and computers. End-to-end encryption is not good enough. That just means between the computers. For example, if you send bitcoins using your computer, there might be a hacker who has access to your computer who can steal your wallet.dat file and use it himself. With homomorphic crypto, even the bitcoin program and wallet.dat would be encrypted to the extent that someone could not even detect that you are using bitcoin, and even if they knew exactly which part of the computers memory bitcoin is supposedly in and which other computers its interacting with across the internet, they still could not detect that its bitcoin running instead of some other peer to peer program. Instead, it is possible to, for example on pen and paper, calculate a number that you type into the "bitcoin running on your computer in homomorphic encrypted form" that tells it you are commanding it to move your money, or have another computer do that, in a whole web of computers that none of them can know what themself or others are doing while they are doing it. Practically, instead of using pen and paper, this means you dont have to trust apps to do the things they say they will or to keep your data private. You could for example give facebook your personal data which facebook would be able to use for certain purposes but could not figure out what your personal data is. There would never be another large scale email apologizing for leaking your data from various websites, since they wouldnt have it but could still compute in turing-complete ways things with it.
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.
Years of Searching: Found Bitcoin Wallet. Data File Missing. Possible Conspiracy?
I sold a lot of runescape gold for bitcoin back in 2010/2011 as a young teenager. I also did a bit of mining. I can't remember the exact amount, but I believe I had around 500 bitcoin in 2011. At the time, it was only worth a few hundred dollars, which was still a lot for me back then. It was my pride and joy. At some point in 2011, my harddrive corrupted and my computer was inaccessible. I paid a hundred or so dollars at best buy to get it fixed. They were unable to do so. I searched the internet for answers to no avail. My birthday came around and I got a new laptop. I kinda just called the old laptop a complete loss. In 2012 I moved off for college. I honesly wasn't even thinking about bitcoin that entire year. That was until my second semester in college, the tail end of 2012. Bitcoin was soaring. Word was getting around that it was at $10/btc. At the time, this was actually huge. A lot of people started cashing out here, believe it or not. It was at this time that I remembered the old laptop. The bitcoin I had was now worth around $5k. I still had no idea how to recover it, but I knew I needed to get that laptop when I went back home. I go home for the holidays and ask about it. My parents had cleaned up house and said they threw it away as they thought it was broken. I was heartbroken. As a broke college student, that $5k was gonna really come in handy. I basically signed that bitcoin off completely after that. It was confirmed trashed. Fast forward a few years. Christmas 2017. Bitcoin is soaring out of control. Now at $15k/btc. Everyone is talking about it. It became a topic at the dinner table. I told everyone about how I once had 500 BTC but it was lost on an old, corrupted, laptop that was thrown away. My dad is fantasizing about how rich we'd be now. He was very frustrated at the idea of literally throwing it away. It was at this point my sister's husband says that my dad gave him a laptop amongst other old electronics back then and that he thinks he still has it. We literally ended the dinner right then and there as I demanded we drive to his house. We search all over to no avail. He thinks he might have actually thrown it away as well... The loss is felt all over again. Fast forward. March 2020. Things really haven't worked out for me in life. I'm broke. I'm out of a job at the moment due to corona. Idk how I'm ever gonna get ahead. I have random nights where I beat myself up for not being smarter as a teen. Surely there was a simple solution to a corrupt harddrive. Why did I smoke so much damn weed? Why did my dad have to give it away? Why did my sister's husband have to throw it away? Whyyyyyyyy. My sister calls me. She says she found my laptop. Holy. Shit. I drive over and power it up at her house. It turns on flawlessly... Everything is there... All my files... No corrupt harddrive anymore... What the fuck... I open bitcoin. Error. I search through all the files. The wallet is missing. "Wallet.dat" is gone. "Wallet.cpp" and "wallet.h" are there, but not the data file. What the fuck is going on. There's no way my sister did anything, she is clueless with computers. Her husband is a web developer though... Maybe he fixed it and stole the wallet. Maybe that's why they've had a huge upgrade in their life in the past year... I ask my sister if her husband did anything and she says not that she knows of. Why would she tell me about it then? Surely she would know if her husband acquire millions in bitcoin? Was this her way of telling me without actually telling me? She knows I've fallen on tough times. Does she feel guilty? I confront her husband and he has no idea what I'm talking about. I feel like I'm acting crazy now. Was I hacked in the past and had my wallet stolen? Did the best buy person steal it? I seriously think it was her husband. As far as I know, he still works the same job, but they've bought a huge house, multiple cars, and lived a lavish lifestyle all in the past year. I'm losing my mind here. My sister acts clueless. I feel like a crazy horrible person to even accuse them of doing that, but here I am... seriously questioning them now. I just don't know what to do from here. Do I call the police? I don't even know if I technically owned that bitcoin. I'm just so confused by everything right now. If her husband found the laptop in 2017 and cashed out, he would have made at least $7 million. That's enough to make ANYONE turn slimy. Hell, part of me doesn't even blame him. I just want to know what the fuck happened. It is driving me absolutely insane. Does anyone have any advice here? And if, by chance, said husband reads this, if you stole the btc just give me some sign to ease my mind. Anything. I just want to know. If you didn't steal it, I'm sincerely sorry, but I hope you understand why I would accuse you.
Questions and Answers from OKEx AMA with Tron Black - 2/18/2020
https://twitter.com/OKEx/status/1228212766126661633 The AMA was a huge success! THANK YOU TRON! If you want to see all the questions that poured in when they opened the AMA up for questions from the audience, here they are: https://pastebin.com/KVpyXmgu The Telegram admins had to temporarily mute the group because there were so many questions flooding in from so many people. A *good problem* to have. :) Below are all the ANSWERED questions. ------------------------------------------------------------------- [email protected], [18.02.20 05:09] Here’s question#1:What is your background and how did you come to the idea to create RVN [email protected] Tron Black, [18.02.20 05:12] Sorry, I was locked out for minute. Tron Black, [18.02.20 05:12] I'm just a tiny part of Ravencoin, and there are some amazing developers (Jeremy, Mark, Cade, and Corbin) that have been brought the new capabilities to mainnet. The core idea of bringing assets to a bitcoin-derived blockchain platform came from Bruce Fenton, a former Executive Director of the Bitcoin Foundation with life-long experience in the traditional finance and stockbroker world. Medici Ventures is allowing some of its developers to contribute to the project. I was fortunate enough to have the right background to help with this project. I have a CS degree, C++ coding skills, economics background, early entrepreneurial success, teaching experience, an MBA, and a burning passion for the crypto-space and how it can change the world for the better. [email protected], [18.02.20 05:12] Thanks. Here's question#2: Why did you name the project Raven? What was Raven created to solve? What is the business model of the project? Tron Black, [18.02.20 05:12] The name came from Bruce Fenton. Ravens are clever birds with a rich history. Ravencoin makes it easy to create and transfer your own asset. There isn’t a business model for the project. It is a gift to the world in the spirit of Bitcoin. Medici Ventures has allowed some of its top developers to contribute time and effort to the project. Medici Ventures does hold some mined RVN, so it may be a win-win. [email protected], [18.02.20 05:14] Thank you for answering. Let's move on to the next question# 3. What are the $RVN tokens used for? What gives it value? Tron Black, [18.02.20 05:15] Thank you for asking. Tron Black, [18.02.20 05:15] The RVN tokens are used to purchase your own token on the Ravencoin platform. Tron Black, [18.02.20 05:16] Those RVN are burned. Tron Black, [18.02.20 05:16] RVN is also used to incentivize the miners to secure the chain. Tron Black, [18.02.20 05:16] RVN is also used for transaction fees for tranferring RVN or user-created (your) assets. [email protected], [18.02.20 05:17] Cool. Here's question# 4:In your opinion what is the unique "selling" point, or best feature, of Ravencoin? Tron Black, [18.02.20 05:17] This is like being asked "who is your favorite child." Tron Black, [18.02.20 05:18] Except answering it doesn't cost children thousands in therapy so I'll give it a shot. Tron Black, [18.02.20 05:18] The best feature of Ravencoin, with the most unexpected results, has been its linkage to IPFS. Tron Black, [18.02.20 05:19] This was originally done to ensure that meta-dat about a token doesn't get lost like it has on other platforms like Counterparty. Tron Black, [18.02.20 05:19] The linkage to IPFS has RECENTLY been extended to include messaging, and memos. Tron Black, [18.02.20 05:20] You can now include information, even a PDF, or a video clip with every transaction. Tron Black, [18.02.20 05:20] This is powerful, and I can't wait to see how it gets used. Tron Black, [18.02.20 05:20] -------------------- [email protected], [18.02.20 05:20] Quesiton#5 What are the advantages of using Ravencoin for assets tokenization compared to other blockchain protocols? Tron Black, [18.02.20 05:21] Wow. Where do I start? Tron Black, [18.02.20 05:21] First, the meta-data about the token can be recorded via IPFS, so everyone knows what the token represents. Tron Black, [18.02.20 05:22] Second, the token has a unique name which can help with preventing fake tokens, and allows humang readable "root-of-trust" for the token that isn't just 40 characters of hex (ERC-20). Tron Black, [18.02.20 05:22] There explorers for assets, like: https://ravencoin.asset-explorer.com Tron Black, [18.02.20 05:23] and https://www.mangofarmassets.com/assetviewer Tron Black, [18.02.20 05:23] Wallets like RVN Wallet, MangoFarms Wallet, and Zelcore wallet support Ravencoin assets. Tron Black, [18.02.20 05:23] -------------- [email protected], [18.02.20 05:23] Here's our next question from Twitter# 6: Does being fully community-driven blockchain have its own drawbacks for rvn? You know, voluntarism means no marketing or legal team. Tron Black, [18.02.20 05:24] Yes, oh yes. Tron Black, [18.02.20 05:24] But the benefits far outweigh the drawbacks. [email protected], [18.02.20 05:24] [ Photo ] 📣Group is Off Commenting for a while due to AMA. Will allow back when Q&A session later. Kindly be Patience with us. Thank You🥰 Tron Black, [18.02.20 05:24] It is just technology that people choose to use. Tron Black, [18.02.20 05:24] Ravencoin has attracted the right kinds of people, including donated legal help when it was needed. Tron Black, [18.02.20 05:25] The lack of a marketing budget does slow the awareness. Tron Black, [18.02.20 05:25] In some ways this is good, and the demand for RVN isn't reliant on promotion. Tron Black, [18.02.20 05:25] As other projects stop promotion, or run out of marketing funds, they are at risk. Tron Black, [18.02.20 05:26] Ravencoin is just growing slowly and steadily as more people learn about it. Tron Black, [18.02.20 05:26] Consider yourself fortunate to have learned about Ravencoin early.😁 Tron Black, [18.02.20 05:26] --------------- [email protected], [18.02.20 05:27] Great!!! Here's the next question from Twitter# 7:is it apple to apple if I say that ravencoin is going to disrupt wall street just like bitcoin is disrupting to central banking? Tron Black, [18.02.20 05:28] At the very least, Ravencoin will help show the way that tokenization can improve capital formation. It is up to others to take advantage of these new tools, technologies, and features. Tron Black, [18.02.20 05:28] It might happen first in countries other than the U.S. Tron Black, [18.02.20 05:29] Look at the story of Blockbuster Video (former leader in video rental), and Netflix (current video streaming leader) to see what might happen in the future. Is Wall Street the new Blockbuster Video? Tron Black, [18.02.20 05:30] I see similar patterns of arrogance, but only time will tell. Tron Black, [18.02.20 05:30] --------------- [email protected], [18.02.20 05:30] Here's the next question# 8: How will Ravencoin defend hashrate distribution (algo question) if there are important securities issued on this platform (double spend attack)? Tron Black, [18.02.20 05:31] Ravencoin doesn't re-org after 60 blocks which helps prevent double-spend attacks -- a feature called NLR. Tron Black, [18.02.20 05:31] Also, something to be aware of is that in most cases tokens are redeemed by an issuer which removes the incentive to double-spend. Tron Black, [18.02.20 05:32] Example: Let's say the token is a share of real-estate. The laws of the jurisdiction for the real-estate would apply when redeeming for dividends, etc. Tron Black, [18.02.20 05:33] Also If the issuer is using the Restricted Assets feature of Ravencoin which have tokens that start with $, then the stolen tokens can be frozen. Tron Black, [18.02.20 05:33] Note: Regular assets (not starting with $) can't be frozen. Tron Black, [18.02.20 05:33] The issuer of the token should specify how redemption is handled. Tron Black, [18.02.20 05:33] -------------- [email protected], [18.02.20 05:34] Thank you for your detailed answer. and Quesiton#9 How does RVN works? What problem did RVN solve? How do the Tokenomics work? Tron Black, [18.02.20 05:34] RVN works like BTC, because it is a code fork of BTC. Tron Black, [18.02.20 05:34] RVN lets you create your own tokens in under a minute. It is easy!!! Tron Black, [18.02.20 05:34] RVN is required to create your own token. Tron Black, [18.02.20 05:35] Heres' the breakdown: Tron Black, [18.02.20 05:35] 500 RVN burned to create a root asset with a unique name. 100 RVN is burned to create a sub-asset (under a root asset). 5 RVN is burned to create a unique asset (NFT). 1000 RVN burned to be a qualifier. 1500 RVN burned to create a Restricted Asset with special superpowers. 0.1 RVN burned to attach a tag to a Ravencoin address. A small amount of RVN is used, but not burned to transfer assets. Tron Black, [18.02.20 05:35] ------------ [email protected], [18.02.20 05:35] Let's move on to the next question#10 Safety and security are always the most important things. So what is the security mechanism of RavenCoin to ensure user assets do not become the target of hackers? Tron Black, [18.02.20 05:36] Ravencoin has a strong network of miners. Tron Black, [18.02.20 05:36] Most of the original code is from Bitcoin which is probably the most vetted code in the world. Tron Black, [18.02.20 05:36] We have run a bug bounty to hopefully find any flaws before release to mainnet. Tron Black, [18.02.20 05:36] With all that said, there are no guarantees as this is just source code provided for free that folks choose to run. Tron Black, [18.02.20 05:37] If you need absolute assurance, then you should commission an audit of the code. There is no Ravencoin company, just a GitHub repository and a lot of passionate supporters. Tron Black, [18.02.20 05:37] ------------- [email protected], [18.02.20 05:37] Quesiton#11 Nowaday most investors $RVN simply focus on the price of the token in the short term, and not on the real value of the project. Can you tell us about the motivation and advantages of an investor $RVN in the long term? Tron Black, [18.02.20 05:38] I can't speak to the motivations of individual investors. Tron Black, [18.02.20 05:38] RVN is a great token with good liquidity (world-wide). Tron Black, [18.02.20 05:38] RVN is used to incentivize the miners and help protect the Ravencoin asset platform, so it has a use case. Tron Black, [18.02.20 05:39] RVN can be a store-of-value, and a medium-of-exchange. Tron Black, [18.02.20 05:39] One of my favorite things about Ravencoin is that it is tricky to classify, as it has so many uses. Tron Black, [18.02.20 05:39] I love seeing how people build using this technology platform. Tron Black, [18.02.20 05:39] Ravencoin makes new things possible. Tron Black, [18.02.20 05:39] -------------- [email protected], [18.02.20 05:40] Here's the next question #12 Who are your competitors and how do you intend to thrive amongst them? Tron Black, [18.02.20 05:40] This may sound strange, but I don't see crypto technologies as competitors. Tron Black, [18.02.20 05:41] The crypto space is tiny compared to the legacy systems we've had for fifty years, so I look at every project as a way to bring new people into crypto-ecosystem. Tron Black, [18.02.20 05:41] If we add value, features, and capabilities, then more people will learn about the Ravencoin platform and what it can do for them. Tron Black, [18.02.20 05:41] The ERC-20 smart contract is an alternative asset issuance option, but Ravencoin is much better for most uses, so more education is needed. Tron Black, [18.02.20 05:41] https://medium.com/@tronblack/ravencoin-better-than-erc-20-88a276d3e434 Tron Black, [18.02.20 05:41] -------------- [email protected], [18.02.20 05:42] Quesiton#13 What is the uniqueness of the Raven token? Why should investors (including me) invest in Raven? Tron Black, [18.02.20 05:42] Ravencoin is a platform. Tron Black, [18.02.20 05:42] You should evaluate the capabilities of the Ravencoin platform and ask yourself whether it will be used, and whether it adds value over other platforms like ETH, EOS, or TEZOS. Tron Black, [18.02.20 05:42] Hint: It does. I try not to provide investment advice, so do your own research. Tron Black, [18.02.20 05:43] https://ravencoin.org Tron Black, [18.02.20 05:43] https://medium.com/@tronblack Tron Black, [18.02.20 05:43] --------------- [email protected], [18.02.20 05:43] Quesiton#14 What your plans in place for global expansion, are you focusing on only market at this time? Or focus on building and developing or getting customers and users, or partnerships? Can you explain this? Tron Black, [18.02.20 05:43] Ravencoin is already a global phenomenon. Tron Black, [18.02.20 05:44] South Korea has been onto Ravencoin for some time now, and I had the opportunity to speak at a South Korean Ravencoin meetup that filled an Art Hall with a waiting list. Tron Black, [18.02.20 05:44] Because of OKEx, that awareness will expand to China. Tron Black, [18.02.20 05:44] Our focus is building and education about Ravencoin. Tron Black, [18.02.20 05:44] There is no marketing budget, and we raised no funds. Tron Black, [18.02.20 05:45] The success so far has been completely organic, and Ravencoin has the best community of any coin, anywhere. Tron Black, [18.02.20 05:45] ------------ [email protected], [18.02.20 05:45] Here is THE LAST question#10 from Twitter before we accept questions from the Telegram chat. what are your hopes with the $RVN listing on u/OKEx Okex going forward? Tron Black, [18.02.20 05:45] I hope the OKEx $RVN listing brings awareness of Ravencoin to new parts of the world. Tron Black, [18.02.20 05:46] The project is more capable than most people know, and because it was launched without raising any funds, there isn't a marketing budget. Tron Black, [18.02.20 05:46] It is up to smart individuals, like yourselves, to figure out what Ravencoin can do, and use the technology to make new companies and new projects. Tron Black, [18.02.20 05:46] ------------------ +++++++++++++++++++++ Tron Black, [18.02.20 05:57] >>> When is mainnet launch? January 3, 2018 Tron Black, [18.02.20 06:01] >>> A project's Technical development may not always be reflected on the price of it's token. What is raven doing specifically to increase price of its token? I agree. And I think it is especially true in the case of Ravencoin. The true value may not be reflected in the short-term. The Ravencoin project isn't a company. It will take time. There isn't a marketing dept or budget, but through events like these, and podcasts, and blogs, and new projects building on top of Ravencoin, I think the value will eventually be reflected. Tron Black, [18.02.20 06:06] >>>> Give me some important reasons why we need to buy RVN token where in fact hundreds of project failed and it went to bankruptcy or even developers run when they collect millions/billions of funds…? Can you explain it to us Many got burned during the crazy ICO phase of 2017. Ravencoin did not participate. Ravencoin is technology and a passionate community. If I get hit by a bus tomorrow (heaven forbid), the project will continue because it is free, open-source and anyone can carry it on, or contribute, or use it, or copy it. Ravencoin can't go to bankruptcy. It is code, and it doesn't borrow, or or have debt. Some of the core develoepers, myself included, are allowed to work on the project while working for Medici Ventures. This is a great arrangement. Tron Black, [18.02.20 06:06] ----------------- Tron Black, [18.02.20 06:10] >>>> How does RAVENCOIN evaluate the importance of the user community? In the near future, does RAVEN have any special plans to attract and expand the community ? The Ravencoin community is the most important and valuable part of the project. There are already clones of the code, but not of the passionate, helpful, and dedicated community. We invite you to become a part of it, and help expand it in Asia. Tron Black, [18.02.20 06:10] -------------------- Tron Black, [18.02.20 06:13] >>>>. RVN is regulatory compliant project for assets tokenization in U.S. Meaning that the assets issued in RVN protocol is fine with the U.S authorities. Ravencoin provides features that help U.S. issuers stay legal under the existing U.S. rules. I've written about how this can be done, but I would always recommend having your plans reviewed by a competent attorney. The U.S. rules are complex, and from a different era. Tron Black, [18.02.20 06:13] --------------- Tron Black, [18.02.20 06:18] >>>> Ravencoin is constantly finding new big partners.Audience is constantly growing.What’s the secret to this growth rate? A vibrant, and welcoming community. Technology that solves real tokenization problems. Easy-to-use, so anyone can participate. Not launching as an ICO, so it is fair for everyone. Tron Black, [18.02.20 06:18] -------------- Tron Black, [18.02.20 06:20] Thank you everyone for the fantastic questions. I would like to answer every one of them, but it is after 4am and I should get some sleep. I really appreciate all the participation, and I hope your trading on OKEx goes very well for all of you!!!
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