Wallet Recovery with Bip39 Seed - Bitcoin Stack Exchange
bips/english.txt at master · bitcoin/bips · GitHub
Bip39 tool - Bitcoin Stack Exchange
Discussion about Bitcoin. BitcoinSV restores the original Bitcoin protocol, will keep it stable, and allow it to massively scale on-chain. BSV will maintain the vision laid out by Satoshi Nakamoto in the 2008 white paper - Bitcoin: A Peer-to-Peer Electronic Cash System.
I currently own a Coinbase wallet and only log on through my laptop and browser for my iPad. I’ve checked the App Store and noticed negative reviews for the Coinbase app. Is there any real draw backs to the app or are these reviews jus full of it? I’m obviously not going to have my laptop with me all the time so if I can buy sell or trade on the app while I’m on the go then that be great but don’t want to bother fiddling with app if it’s not worth it. Thank you all for your continued support
Bitcoin / Cryptocurrency Security Is It Possible to Add a Second Layer?
I am kind of new to crypto, less than 1 year. Recently I am playing with Ledger Nano S. I understand that we can openly share the public key, like the bitcoin address. Because there is no way to extract private key from public key. I understand that I have the back up for my private keys. But still don't feel very safe. I mean, let's say, by any chance, someone stole my back up phrase, then they can easily steal my crypto and I don't even know it until I check my balance. I know I have to keep my back up phrase safe and private, but there is a chance right? Other than that, what if, by such a small probability that someone draw 24 random words from BIP39 word list, and it happens to be the same with my back up phrase? I know the probability is very very very low, but still, not 0, right? I am thinking that, is it possible, in future, crypto like bitcoin, incorporate another layer of security besides private key witness, for example, when anybody move my bitcoin with my private key (I mean the move on blockchain, not within exchange), I will receive an email notification immediately, which has an approval link. Without clicking the approval link, my crypto still can not be spent although it was signed by private key. Just like withdraw from binance or coinbase. Google authenticator is the first layer, the link in email is the second layer. Is it possible in the near future? Or any crypto work like this way please?
Best exchange for tiny amounts of fork coins? (BCH, BSV, etc)
A buddy of mine had a pre-SegWit BIP39 seed from a couple years back. I helped him figure it out and sweep his coins to a new bech32 address. For my trouble, he told me I could keep the keys and use them to claim the various Bitcoin forks that have popped up since he bought those coins. It's not a lot of money by a long shot. My guess is that BCH BSV and BTG combined will net me maybe 20 bucks. But I'm stuck inside on account of this coronavirus thing so I figure I may as well tinker around with blockchains and get myself a 12 pack outta all this. As a boredom buster if nothing else The problem is the amounts are really small, too small to meet the minimum threshold at Changelly. Also, I know there are a lot of Bitcoin forks but I can't find an exchange that supports half of them. Is there a good exchange for this sort of thing? Preferably without KYC so I don't have to wait for all that to go through? I was hoping to swap them out for BTC or LTC
Ferrum Network Community Update — December 8, 2019
Dear Community, What an exciting and jammed pack few weeks it has been — with the launch of staking, the 2Key Network partnership, and a major Kudi update — to name a few! But as the profile of Ferrum continues to grow, it is essential we never stray from the fundamentals that got us this far: hard work, transparency, and a commitment to community. In this community update, we provide a recap of the last few weeks, and look ahead to a few initiatives we are planning. Business Update With the release of the FRM Flexible Staking platform, we took that opportunity to kick the marketing into high gear. These marketing efforts paid off, and we were fortunate to be picked up by top influencers like Teh Moonwalker, Oddgems, and Micro Cap Gems. Here’s what happened the past few weeks.
Released FRM Staking version 0.1 with the 18 month staking pool selling out in about 15 minutes. The total amount of FRM locked for staking is 8,412,666 + 2,397,260 locked for rewards, which equate to around 10% of FRM circulating supply.
Conducted no less than 10 AMAs in the past 4 weeks in major channels like Moonwalker’s, the AMA Room and CryptoCabital, among many others.
Announced a partnership with 2Key Network to utilize their Smart Links technology so our community can be rewarded for referring Ferrum Network products.
We’ve also seen strong growth of the Social Mining platform, with over 50 members now actively participating in the community created Social Mining Chat, and no less than 3,083 members signed up for social mining.
Tech Update For those who missed the Tech Update from our CEO Naiem Yeganeh, PhD, here are some highlights:
Backend. we have made major progress in the backend which is enabling us to launch products faster and cheaper, such as building abstraction layers around security and chain access to speed up the development process
Coding. The dev team have been working on more than 25 repositories and has averaged around 1.5 commits per day, including weekends.
Products. In the past 3 months we have built several products including KYC collection, management tools, and the Token Bridge. Last product is our staking platform built on top of Ethereum network, which is a flexible staking system for ERC20 tokens and a MetaMask integrated UI.
First Kudi. Significant progress in improving, refactoring, and adding features including one-click bank accounts, POS improvements, automatic invoicing, and more.
Unifyre Wallet: Backend is mostly complete, and we are working very hard to make it ready for Beta testers by end of year. Unifyre will be a unique multi-chain crypto wallet. It will be the first wallet where you completely take control of your private keys, but can benefit from server side security checks such as two factor authentication, AI based fraud detection, geo-fencing, locking account on a lost or stolen phone, and other security features. You will have access to buy crypto around the world and will work seamlessly with other Ferrum products.
Network and other products: Most work on Unifyre and Kudi are architectured in such a way to optimize code re-usability. We are making progress toward some other products and the mainnet, which will be announced accordingly.
First Kudi Update The First Kudi team on the ground in Nigeria continues to make significant progress.
Announced the new First Kudi website along with the upcoming initiative with the Kudi Bank card
Added a major feature to the app which gives all our users their own personal bank account through our partnership with Providus Bank!
Our Referral Program has seen major growth, with nearly 100 users being referred in the past few weeks and growing daily!
Apple iOS has been preliminarily approved! However, Apple is requesting certain accommodations so the app works on the iPad, which may require more development work. We appreciate your patience.
We released an early version of a video showing merchants using the app. More videos will be released soon.
What’s Next It is critical we capitalize on the attention we have garnered from the team and community efforts, and to start 2020 with a bang. Here are some of the upcoming initiatives we are working on. Flexible ERC-20 Staking v0.2 We are strongly considering launching another round of staking. We are taking the lessons learned from the first round and improving the experience. Community feedback will be key to make version two even better, so expect to see a series of polls in the coming days. A Trading Community A strong group of FRM traders who post technical analysis on social media is great for exposure and great for liquidity. We are currently laying the groundwork to build a trading community to come up with initiatives like trading competitions and special trading rewards. Anyone interested in joining such a community should PM Ian on Telegram. FRM on Kudi We have been working hard to add FRM and ETH to the Kudi app so our users can buy it directly with Naira. This will also open up additional utilities for the FRM token, including a premium membership program that will reward users for holding the token and using the app. More details to follow. Expansion into other Markets As you may know, one part of our business model is to partner with top notch teams in emerging markets where our fiat gateway + payments app technology can be successful. We are happy to report that we have started to work with such a team in Brazil and they are in the early stages of launching their own product powered by Ferrum Network. More news to follow. Conclusion Thank you all for your continued support of Ferrum Network. 2019 was a really special year that we will never forget. But together we can make 2020 even better! Very truly yours, The Ferrum Network Team Ferrum Network Links: Website: https://ferrum.network/ Telegram: http://telegram.ferrum.network Twitter: http://twitter.ferrum.network LinkedIn: http://linkedin.ferrum.network YouTube: http://youtube.ferrum.network Reddit: http://reddit.ferrum.network Bitcoin Talk: http://bitcointalk.ferrum.network Facebook: http://facebook.ferrum.network Github: https://github.com/ferrumnet/ Instagram: http://instagram.ferrum.network
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.
If you want to dump BSV... some tips on splitting safely. Don't lose your BCH!
Many people are interested right now in gathering up their BSV coins and dumping them on exchanges. Bittrex has just opened deposits however there is a big caveat: If you attempt to dump your BSV coins onto an exchange like Bittrex, and you have not properly split the coins, a replay attack could result in permanent loss of your (much more valuable) BCH!!! For this reason it is essential that you split your coins and verify that the coins are split.
Step 1 : get your coins into Electron Cash
Electron Cash ( https://electroncash.org/ ) is the de-facto wallet for coin splitting since it allows you to connect to both BCH and BSV chains, simply by selecting a different server in the Network dialog. Important: do not make a separate wallet in Electron Cash and send your coins from another wallet. This transaction might fail to replay, though this failure to replay could be temporary and leave your coins in a dangerous state where replays could happen at any time. Instead, you need to load another copy of your wallet in Electron Cash.
Mobile wallet / other software wallet
We will start by importing your wallet seed into Electron Cash. Create new wallet with type "Standard wallet". "I already have a seed". For BIP39 seeds (see below) click Options button to enable BIP39 seed, and then enter the path on the subsequent page.
If bitcoin.com wallet backup page says "This recovery phrase was created with a password. To recover this wallet both the recovery phrase and password are needed." then you must also check 'custom words' and enter your original recovery password on the next page (this may be distinct from your wallet password).
Some other Bitcoin Cash wallets may use BIP39 seeds with path m/44'/145'/0' . If your funds don't appear with either path above, then try this.
Others to be added...
Wallet.dat / other non-deterministic wallets
Some wallets don't use seeds and just generate random addresses. You'll need to export your private keys in WIF format, then create a new Electron Cash wallet using "Import Bitcoin Cash addresses or private keys". If you are using my coin splitter tool, there is a bug with imported-address wallets that prevents using the splitter from Tools menu. So, right click on the address to do splitting that way.
Try to set up your hardware wallet in Electron Cash. This lets you transact on both BCH and BSV chains even if the official software for your hardware wallet (such as Trezor's) does not support this.
Calin's guide also has instructions on how to select BCH and BSV servers, so it's a good read regardless. There are some cases where a BCH transaction fails to replay initially but then later gets replayed. This could mean that your initial 'dust' initially looks like a split coins but is not, and the replay protection is faulty. For this reason, you should also make a conflicting transaction on the BSV chain, by spending at least one of the same transaction inputs back to yourself.
Step 3 : wait a bit, just to be safe.
With threats of block re-organization attacks floating around, you should wait several confirmations to make sure the splitting 'sticks' and is effectively irreversible.
Step 4 : verify the split
Visit these two block explorer sites and enter the transaction IDs of both your BCH splitting transaction, and your BSV conflicting transaction: BCH explorer: https://blockdozer.com/ BSV explorer: https://bchsvexplorer.com/ On each site enter both transaction ID's. You want to ensure here that transaction A is only on BCH chain, and transaction B is only on BSV chain. If you have failed to split, then one txid will be on both chains. If this happens, don't worry! You can just go back to step 2 and try again.
Step 5 : send BSV
Now that your BSV is split from BCH, you can send it whereever you want without fear if having your BCH accidentally dragged along with it. I cannot provide any advice on what you should do, financially, with your BSV coins. Good luck, and stay smart!
Question about some old seeds I found - I need your expert opinions!
I found some old seeds. 1) I found two seeds that are each 12 words. I opened up electrum and I clicked that I already have a seed. I entered in my seed words. I had to change it to be BIP39 address in order for electrum to allow me to click next. But when I logged in nothing really happened. No transactions. No coins. Did I do this right? Neither of those seeds show anything received or sent which doesn't seem correct. I think one of these was to a jax wallet and the other may have been to a "blockchain" account. 2)I also found a log in/password for CRYPTSY but I assume that they already stole all my stuff. I've known about that for a while. Any news on this? Pretty sure I'd be retired because I was holding a ton of DARKCOIN which became DASH but whatever. 3) I also found a log in for what I wrote as "blockchain wallet". But when I go to blockchain.net or blockchain.com it asks me for both a "wallet ID" which I don't have. I just have a password. https://login.blockchain.com/#/login When I tried to use the "lost email" link and I punched in my emails it doesn't seem like I received anything to my known emails. Any thoughts? 4) I also have a seed that doesn't make any sense. It has 17 words. One of the words is written poorly by me as "donner". Another one of the words is written as "hogans". Wtf? What could this seed have gone to? 5) I have a written down log in/ password for a website called "CRYPTOLIFE.NET". I don't remember using that site at all and if you asked me today I would say that I had never heard of it. But here it is in my writing - a log in - next to the word "cryptolife.net". I went to their website and I couldn't figure out how to log in. My impression is that there may be nothing here. If my memory serves me I had taken all the bitcoin out of these wallets/exchanges and put everything on cryptsy. However, there could be some dust or maybe like .05 bitcoin or something and I'd love to retrieve it. Any ideas? Thanks for the help team!
Let's go over good vs. bad hardware wallet design.
EDIT I want to be clear you cannot screen cap the trezor pin. This is an example of an awful hardware wallet design. To understand why let's refer to the OG the Trezor.
Reliability. The Trezor doesn't have a battery. That means when it's in your pocket there is no chance of someone coming by and wirelessly stealing your private keys. I expect my hardware wallet to be stolen/lost. That being said I do expect that my device be able to work as long as I take care of it. Having a battery kind of limits the shelf life to 5 years or so.
Keep it simple stupid. The Trezor only has a USB connection. That's okay. I'd rather see a camera personally. My understanding is the chip with the private keys is not connected to the USB output so that's good.
I still have limited trust in hardware wallets. AFAIK the Trezor doesn't have an exploit that allows the private keys to leave the device without modifying the hardware. This is an acceptable limitation.
The Trezor is open source.
The Trezor has a screen. This is absolutely vital to prevent man in the middle attacks. It's moronic to have a hardware wallet without a screen.
When you access your Trezor it presents you with a randomly ordered keypad you enter your pin through your computer with a mouse. This way there is no way to keylog or screen cap your pin.
So lets talk about the hoofoo.
It doesn't have a screen. This is an immediate disqualification. There is a very real possibility that the address would be swapped in memory and you wouldn't know.
It has wireless communication over bluetooth. Bluetooth is not a good standard for hardware wallets to use. For one you're broadcasting the encrypted data wirelessly. Not all encryption is created equal. AFAIK all the wifi standards are crackable with sufficient data collection in less than a month. look up blueborne
As a general rule I'll never buy a product that claims to be "hacker proof" unless it's got a REALLY good design. This isn't it.
2FA? On a local device that makes no sense. Maybe they are talking about a 2FA through the blockchain with multisig but that costs money. Is he really saying 2FA is your fingerprint/facial recognition (both trivially compromised (seriously just use a picture of the owner) and spoofing a bluetooth device. This sounds so simple and easy I halfway want to buy one just to crack it the first day. This doesn't even qualify as 2FA in my opinion because both of the factors are controlled by a single device. The entire point of 2FA in my opinon is to have a completely separate device be responsible for authorizing you. Otherwise there is no point the device is a single point of failure.
OMFG It allows you to access signing your private keys with finger print and face recognition... thats MORONIC!! Fingerprint scanners are in no way secure and face recognition ... did you see the apple keynote or youtube? This is probably the worst hardware wallet ever created.
These idiots actually believe that you can't fake a bluetooth mac address? (again this guy is blatantly lying when he says that hardware wallets like the trezor have been hacked w/o a hardware modification)
What the fuck is a motherbox? Having 2 devices that can recover your private key ... Does he mean seed? Does he not know the difference between a seed and a private key? Nothing in the video indicates he's using the BIP39 standard. What happens when your house burns down and you lose both your hardware wallet and the motherbox? What are the design specifications on this motherbox? Sorry but if it's capable of recovering private keys and seeds then the security details surrounding it need to be gone over.
Hoofoo is a scam. The claims made are provably false. Do not support this company. Security features I'd like to see in a future version of a hardware wallet are as follows. I really like the features of the trezor, they got a lot of things right as I mentioned above. Limited communication access on old wired technology. A screen. The way you input the pin so it cannot be screen recorded or keylogged (they should disable keyboard input on internet connected devices but that comes down to user error I guess)
I'd prefer the USB to be charge only without communication. Instead I'd rather use QR codes to exchange the unsigned and signed transactions back and forth. I could see the device allowing you to scan a QR code, and you verifying it looks good. Then putting in your pin to sign.
I'd like the option to hold a small battery powered qi charger to the back of the device to provide it power.
I'd like the device to ship with the components visible in a clear plastic coating. I would like to be the one who encloses the device and that case once put on cannot be removed without destroying the hardware wallet.
Groestlcoin September 2019 Development Release/Update!
For a more interactive view of changes, click here In our current world; bordering on financial chaos, with tariff wars, Brexit and hyperinflation rife, you can count on Groestlcoin to consistently produce innovation that strikes to take the power away from the few and into the many, even after a full five and a half years of solid development. Here is what the team has already announced in the last 3 months since the last development update:
Groestl Nodes aims to map out and compare the status of the Groestlcoin mainnet and testnet networks. Even though these networks share the same protocol, there is currently no way to directly compare these coins in a single location. These statistics are essential to evaluate the relative health of both networks.
Shows Onion (Tor) nodes
Shows IPv6 nodes
Supports both main net and test net
Node Checker – Check the status of a remote node
Ability to download node data by CSV, JSON or TXT format
Ability to download unique address data by CSV, JSON or TXT format
This is a tool for creating unsigned raw Groestlcoin transactions and also to verify existing transactions by entering in the transaction hex and converting this to a human-readable format to verify that a transaction is correct before it is signed.
Create Raw Unsigned Groestlcoin transactions
Generates a QR code for the transaction
Compatible with most Groestlcoin wallets including but not restricted to Groestlcoin Core and Electrum-GRS
Estimates final signed transaction size
Taking a raw transaction format and shows its Transaction ID, Transaction Inputs and Outputs
AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always-on Android appliances such as set-top boxes, Android TVs and repurposed tablets/phones. If you are a non-technical user of Groestlcoin and want an Android app that makes it easy to run a Groestlcoin Core node by acting as a wrapper, then AG Core is the right choice for you.
Update to Groestlcoin Core 2.17.2
Switched to native builds via NDK for Groestlcoin Core resulting in a smaller footprint.
Added embedded tor
Added tor pairing support
TOR upgrade bug fixes
Improved blockchain Sync progress using getblockchaininfo verificationprogress
Improved package download progress bar
Added support for external storage access > Android M
Added support for Android Oreo, including new notification mechanism
Bump Fee (RBF) improvements – Implemented a new fee-bump strategy that can add new inputs, so now any transaction can be fee-bumped. The old strategy was to decrease the value of outputs (starting with change). We will now try the new strategy first, and only use the old as a fallback.
Coin Choser improvements
More likely to construct transactions without change (where possible)
Less likely to construct transactions with really small change
Only spend negative effective value coins when beneficial for privacy
Fix long-standing bug that broke wallets with >65k addresses
Windows binaries: Now build the PyInstaller bootloader ourselves, as this seems to reduce anti-virus false positives
Fix performance regression for large wallets
Fix high-DPI issues related to text fields
Trezor – Allow bypassing 'too old firmware' error
Trezor – Use only the Bridge to scan devices if it is available
Hardware wallets – On Win10-1903, some hardware devices with U2F functionality can only be detected with Administrator privileges. A workaround is to run as Admin, or for Trezor to install the Bridge.
The AppImage Linux x86_64 binary and the Windows setup.exe are now built reproducibly.
Fix watch-only wallets that could not bump fee in some scenarios
Faster transaction signing for segwit inputs or really large transactions.
Groestlwallet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, keychain and code signatures, groestlwallet represents a significant security advance over web and desktop wallets, and other mobile platforms. Simplicity is groestlwallet's core design principle. Because groestlwallet is "deterministic", your balance and entire transaction history can be restored from just your recovery phrase.
iOS 0.7.3 Changes
Fix BIP70 payments
Updated QR Scanner
Lowered spending limit
Updated DNS Seeds
Fixed URL Scheme
Fixed GRS Name in mailing
Fixed crash upon starting in some scenarios
Android v89 Changes
Use default fee
Republished on Google Play by removing send_sms permissions
A method of claiming bitcoin gold (BTG) coins right now
Hello all, I found a way to successfully claim my bitcoin gold coins, prior to main exchanges supporting them. I'm doing this using the Coinomi app - so if you have an Android phone step one is to go to Play Store and download this app. When the app is installed click on +COINS & select BitcoinGold. You will see they are currently worth £130 (~$170) each. This creates a bitcoin gold wallet within the coinomi app. Now comes the slightly tricky part; you need to extract the private key from the wallet that held Bitcoin at the time of the recent BTG fork (which was a couple of weeks ago). if you are going to do this I would recommend moving your coins to a brand new wallet beforehand, because once the private key for your bitcoin wallet is exposed online I would consider that wallet to be vulnerable. Here is a guide from the coinomi support pages that tells you how to extract the private key from different wallets ( it was written for the Bitcoin cash fork but the principle is still the same) https://coinomi.freshdesk.com/support/solutions/articles/29000013719-how-to-get-bitcoin-cash-from-many-wallet-software-services-with-coinomi At the bottom of this article, you will see an attachment for a BIP39 tool. You need to download this and in the box that says "BIP39 mnemonic" - you enter the 12 word seed for your bitcoin wallet. If you done look further down on this tool you will be provided with a list of public keys and private keys for that wallet. Select and copy the private key ( which for me was the first address line at the top) Now go back to your coinomi app and the newly created bitcoingold wallet. Click on the menu in the top right corner and select "Sweep Wallet" - you are then presented with a screen that asks for a private key. Paste in the private key you have just extracted from the BIP39 tool & hey presto you should see your bitcoin gold coins (1 BTC = 1 BTG) The coinomi app is really good as supports over 80 different coins. You can now decide whether to keep your bitcoingold or exchange it for another coin... The steps ive listed above are all very new - not many people will have done this yet and certainly none of the main exchanges have freely issued people with bitcoingold coins yet.
Welcome Doges to our 2nd installment of our weekly developmental updates. We have a few exciting items to talk about! HD Wallet is being added to our core code base. This is a BIP39/44 addition for creating a mnemonic seedphrase over a traditional password for your wallet.dat! Visit our GitHub to see this and our other progress. In addition to HD Wallets, we have added xPubKey and xPrivKey commands as well. These keys are for all used and unsued addresses your wallet will hold moving forward. The commands will get you the keys in your RPC Console. The Team is also working on bringing a light version of BitNodes, but it will feature similar to BitcoinCash’s fork of BitNodes as seen Here. Alongside BitNodes, we are looking into BitCluster. Both of these tools will bring us more information on our network size, and different statistics. Showing us who is running what versions of wallets and how the network is spread across the globe. Bringing to us also more indepth block information to be able to go through your coins easier. Last, but surely not least is we are going to talk about SignalHub, for those of you just tuning in SignalHub is our first of many platforms in the DogeCash ecosystem. It is a non-traditional Signal Trading platform. Traders can post/sell Signals for users to purchase/subscribe from their Traders they follow. We will be supporting select coins during the beta process, and expanding it daily throughout and until we go live. As well as support for many exchanges to bring a robust amount of choices for Signals listing and purchasing. Traders should have all they need in one place and the users will have the information they need from the good Traders! So join us for the closed-beta registration and enjoy the perks of helping us put together this platform and some extra free time when its complete! Beta SignUp. That is it for this week. Aren’t you Doges excited to see whats next? -The DogeCash Team
Electrum 3 is probably the first wallet to support native segwit (bech32) addresses. There are a few misconceptions regarding the different formats of segwit addresses that are in use right now. This post aims to clarify the consequences of using each type and explains advantages and disadvantages.
bech32/BIP173/"native segwit" Bech32 is a brand new address format that has a few advantages over the current address format:
Addresses are case-insensitive
Better error detection
More compact QR codes
Most importantly, bech32 segwit addresses enable native segwit transactions for Bitcoin. Those addresses always start with bc1. With such an address you can send to any and all wallets, exchanges and websites. However, currently (September of 2018) support from exchanges and some wallets to send to your wallet is still somewhat lacking, see Bech32 adoption. Please decide for yourself if that's enough for your needs. To use these addresses, simply create a new wallet and choose "Segwit" as the seed type in the creation wizard.
segwit-in-p2sh/P2SH-P2WPKH This is the address type that hardware wallets like Trezor or Ledger use. Addresses look like regular P2SH addresses, they start with 3. Without going into too much detail, this uses an old address type and uses segwit to spend from it. The advantage is that virtually all wallets already know how to send coins to this kind of address. One disadvantage is that to spend from those addresses, additional complexity is added to the transaction which makes those transactions slightly bigger (and thus more expensive) than native segwit transactions. Electrum also supports this kind of addresses but you need to manually import a BIP39 seed with a BIP49 derivation path.
tl;dr. electrum's segwit wallets are GREAT! but for the short term, until other wallets upgrade, they will be a pain to use
Another Quarter, Another Release! The Groestlcoin production factory has been working overtime as always in order to deliver even more tech to push Groestlcoin mainstream when the time comes. There have been many new fantastic wallets and exchanges added to Groestlcoins repertoire over the past 3 months so we will re-cap these before moving on to what is new today.
Groestlcoin added to SatWallet – A 3-in-1 service. Multicurrency wallet, exchange and soon a debit card!
ChangeHero announced a week of 0% commission for Groestlcoin trades.
Added to BC Bitcoin cryptocurrency exchange, offering 8 fiat pairs!
Added to Chameleon Pay mobile wallet for Android and iOS!
Added to the Okex' strategic partners cryptocurrency exchange; CoinAll! Offering BTC and ETH pairs! With a 21,5000 GRS Giveaway!
Added to Spark Card! Our second MasterCard for Groestlcoin! Provided by Pungoio, powered by TarjetaSpark and issued by Mastercard!
Added to Swirlpay! A decentralised peer-to-peer payment gateway.
Added to Archos Safe-T Mini hardware wallet! Built around encrypted Chipset memory.
Added to Agama Wallet – A multi-asset encrypted wallet for iOS, Android, Windows, Mac OS and Linux from Komodo.
Added to Mr Coin exchange, with 2 fiat pairs (EUR and HUF)
Added to CryptoFacil Exchange – An exchange powered by Bittrex and is a fiat gateway. Leaving you with the ability to buy GRS with Visa and Mastercard.
Added to Bits Game – A gambling service with 2 'PvP' games
Added to Boost X Change Cryptocurrency exchange!
Added to Sucon's Suworld Korean cryptocurrency exchange!
Added to DCXinsta cryptocurrency exchange and swap service with Fiat pairings.
Added to DCXtrade, an Indian cryptocurrency exchange with BTC and ETH pairings.
Added a fiat KRW pairing on Huobi Korea Cryptocurrency Exchange!
Added to AirGap wallet, allowing you to securely store your GRS on an offline device.
Added as a payment method on hodlhodl, allowing you to make global trades without KYC/AML.
Added to TrustWallet cryptocurrency wallet for iOS and Android
The existing Magnum wallet adds SegWit support for the wallet! Allowing SegWit addresses to be used and created from within the wallet.
Added to CycleBit – Who provide POS Terminals that accept GRS payments anywhere, in-store and online. 130 coffee houses in Spain already accept GRS using Cyclebit POS terminals!
Added to Bitinka Cryptocurrency exchange! The #1 exchange in Latin America with 5 fiat and cryptocurrency pairs!
Added to Atomic wallet, a non-custodial cryptocurrency wallet with encrypted private keys and 40,000 monthly users.
Added to NoMiddleMan cryptocurrency payment gateway, offering no usernames, no registration, no KYC, no fees. Completely free to use!
Added to Blockchair! An advanced data analysis tool, mempool monitor and block explorer!
Added to SecuX V20, SecuX W20 and SecuX W10 hardware wallets!
Re-forged: Groestlcoin Samourai
Groestlcoin Samourai is a wallet for the streets. A modern Groestlcoin wallet hand-forged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are its extreme portability and is the most secure Groestlcoin mobile HD wallet. We've built a wallet that Groestlcoin deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in, this is the perfect wallet for you. ![Groestlcoin Samourai Release Video](http://img.youtube.com/vi/i3WU8Tde8XQ/0.jpg)
Head over to the Groestlcoin Samourai Release Page here for the full release announcement.
Groestlimage turns any file into a mnemonic phrase allowing users to generate Groestlcoin private keys and addresses based on the data URI of the provided file. A picture is worth a thousand Groestls.
Turn any image, document or audio file into a BIP39 mnemonic phrase
Groestlcoin Core Config Generator is a simple GUI to configure the groestlcoin.conf file – A developers dream tool! Each configuration option is available via the user interface, grouped by what attributes they affect. For ease of getting started with a new configuration, a variety of preset "node classes" are available on the right-hand-side of the screen. Selecting a preset will load our recommended base configuration for a node fitting that description, at which point you can then tune the configuration at the single option level.
Choose between Mining, Non-Standard Ports, Low Bandwidth, Pruned, Raspberry Pi, Tor, Testnet, Regtest, Non-Syncing and Lightning Éclair presets.
Groestlcoin Simple Push TX is a server to push Groestlcoin transactions via SMS. Now everybody can send new transactions via SMS if the Internet is not usable (i.e. blocked by government entities or becomes otherwise unavailable).
Ability to push either Base64 or Hex-Encoded Raw Transactions via SMS.
Send SMS transactions to PushTX through the number +32460224477 (+32460224GRS)
Electrum-GRS is Groestlcoins #1 thin-client for Windows, MacOS, Linux and Android, based on a client-server protocol. Supporting multi-sig wallets without the bloat of downloading the entire blockchain.
New Features (Universal)
Electrum Protocol: The client's "User Agent" has been changed from "3.3.6" to "electrum/3.3.6". Other libraries connecting to servers can consider not "spoofing" to be Electrum
Added CoinGecko.com fiat rate provider. Changed default provider to CoinGecko.com
Minor bugfixes and usability improvements.
New Features (Windows, MacOS, Linux)
Fix Crash during 2FA wallet creation
Fix Synchroniser so that it does not keep resubscribing to addresses of already closed wallets.
Fix removing addresses/keys from imported wallets
The logging system has been overhauled. Logs can now also optionally be written to disk, disabled by default.
Fix a bug in the synchroniser where client could get stuck. Also show the progress of history sync in the GUI.
Fix Revealer in Windows and MacOS binaries
Ledger Nano X is now recognised, supporting mainnet and testnet
KeepKey is now recognised and supports mainnet and testnet
Device was not getting detected using Windows binary
Support Firmware 6.0.0+
Implement "Seedless" mode
Coin Control in QT – Implemented freezing individual UTXOs in addition to freezing addresses
Fix CPFP – The fees already paid by the parent were not included in the calculation, so it was always overestimated.
Testnet – There is now a warning when the client is started in testnet mode as there were several reports of users getting scammed through social engineering.
CoinChooser – Performance of creating transactions has been improved significantly for larger wallets.
Importing/Sweeping WIF keys: Stricter checks
Several other minor bugfixes and usability improvements.
New Features (Android)
Fix rare crash when changing exchange rate settings
Fix bug with local transactions
Allow selecting Fiat Rate providers without historical data
Hi Bitcoiners! I’m back with the sixteenth monthly Bitcoin news recap. It's easy for news and developments to get drowned out by price talk, so each day I pick out the most popularelevant/interesting stories in Bitcoin and save them. At the end of the month I release them in one batch, to give you a quick (but not necessarily the best) overview of what happened in Bitcoin over the past month. Lots of gems this time around! You can see recaps of the previous months on Bitcoinsnippets.com A recap of Bitcoin in April 2018
Coffee Wallet, my wallet/portfolio app, now supports BTC
G'day /bitcoin, In the latest version of my open source application, "Coffee Wallet", I have enabled Bitcoin support. I started this project to make order in a mess in my crypto assets and there were no applications available that would fit my needs. I wanted an app that is both a wallet and a blockchain portfolio. I can easily keep track on all my assets regardless of where I keep them but also accept and spend most popular coins on the go and have my portfolio updated instantly. Here are some Coffee Wallet features worth mentioning:
iOS and Android versions
standard wallet features like QR code scanner, BIP72 payments, fingerprint authentication
extra portfolio features like tracking an address or configuring price source
"send as a message" feature that you can use to send small amounts of crypto to your friends, that do not have a wallet yet, using any medium
simple paper wallets generator
single BIP39 mnemonic for all wallets
changelly.com integration lets you exchange coins without leaving the app
PSA: Contrary to popular belief, you *CAN* create "normal" SegWit addresses (p2sh-wrapped-p2wpkh) in Electrum! The ones that start with `3` and are backwards compatible! Learn how inside.
I posted this yesterday, but it didn't get very much attention. This is huge, it makes it almost trivially easy for anybody with a computer to start using SegWit immediately.
There are two main types of SegWit addresses. The "new" type is bech32, which start with bc1. You cannot send to bech32 addresses from older wallets that don't have proper SegWit support, including many exchanges and other Bitcoin-related sites. The other type, p2sh-wrapped-p2wpkh, uses p2sh, which has been around since 2012, to allow SegWit to be used without sacrificing backwards-compatibility. These addresses start with 3. You can still send to them from older wallets. This is what basically all SegWit wallets except for Electrum use by default, because they still give you most of the benefits of SegWit and always "just work". The Electrum developers justify using bech32 by default because transactions from bech32 addresses are slightly smaller (more scaling!) and have additional error-checks to protect against mistyping an address compared to p2sh-p2wpkh. However, there is a way to use p2sh-wrapped-p2wpkh instead of bech32 with Electrum, it's just apparently not very well-known. It's not advertised anywhere in the Electrum documentation.
When creating a new wallet...
Select "Standard wallet" type
Select "I already have a seed"
Click the "Options" button, and check the "BIP39 Seed" box
As per usual the 3 months has been all hand-on-deck, helping to bring further adoption utilities to Groestlcoin. The markets have been red but as always that doesn't stop the show from going on with regards to the development since the last release update on 24th September. Here's a recap of what has happened so far:
Groestlcoin was added to Changelly. One of the leading Crypto-to-Crypto exchanges that offer some of the best rates on the market – You can also buy with a debit/credit card too and you can buy/sell Groestlcoin directly from your Coinomi wallet, from the website https://groestlcoin.org#exchanges, and you can enable Changelly swaps on your GRSPay stores!
Groestlcoin was added to the JAXX Liberty wallet! One of the leading multi-crypto wallets in the stores. Safely store your GRS on Android, iOS, Mac OS X, Windows, Linux or Google Chrome. With Jaxx Liberty you are always in control of your private keys, and you can use your wallet on multiple devices. Note: This directly replaces the deprecated JS Wallet which was of a similar (but older) codebase.
Groestlcoin was integrated into AtomicPay – A decentralised cryptocurrency payment processor that eliminates the involvement of a third-party gateway, allowing merchants to accept payments directly from their customers, with over 2500 merchants already signed up, a public release is set for Mid-January 2019.
Huobi officially opened trading for Groestlcoin to Korean customers! And in addition, a giveaway of up to 10,000 GRS was held!
Unocoin ATMs started supporting Groestlcoin at their ATMs, granting the Indian community the ability to withdraw (For INR) and deposit Groestlcoin into their UnoDax account. Groestlcoin $GRS is available on #Unodax exchange with the following pairs: $INR, $TUSD, $BTC.
Groestlcoin was listed on SWFT BLOCKCHAIN, giving you more opportunities to swap your other altcoins with Groestlcoin or vice versa, quickly and securely.
Groestlcoin was added to One Page Exchange! Where you can buy and sell Groestlcoin quickly and easily without any form of registration!
CryptoWolf started accepting VISA, Mastercard and Maesto to buy cryptocurrencies from the CryptoWolf exchange in EUR or USD! Providing a new FIAT gateway to buy Groestlcoin.
Groestlcoin has been added to CoinZark (Formally VertPig) for fast and efficient Crypto-to-Crypto swaps at very competitive rates using exchange aggregates.
Groestlcoin was added to PungoWallet! Pungo wallet is built to showcase the features that anyone can achieve with blockchain technology. They have built a set of modular solutions that allow any company to build a blockchain layer to interact with traditional software.
Groestlcoin was added to StealthEX, offering anonymous cryptocurrency swaps with tens of other coins without disclosing any personal information. Just choose the pairs, enter your address, send your coins and receive your funds!
Groestlcoin joined InvestFeed, granting a company listing and blue verified badge.
Groestlcoin was officially added to Blockfolio Signals – For those of you that use Blockfolio, you can keep updated with all the latest news straight from the app, via the Signals icon.
Groestlcoin has been added to DeltaDirect – Those using Delta can now stay up-to-date with the latest Groestlcoin news, straight from your Delta portfolio tracker app.
Groestlcoin has been added to CoinGecko Beam – Where you can easily follow us and receive updates without searching through social media.
Groestlcoin is now live on BitUniverse Link! All of the latest Groestlcoin updates and news will be directly available on BItUniverse.
Groestlcoin was added to NovaExchange! Launched in 2016 and operating from Sweden, users can trade over 300 different digital assets.
As of the latest version of the Trezor Model T firmware, Groestlcoin is now officially supported! The Trezor Model T is the next-generation cryptocurrency hardware wallet, designed to be your universal vault for all of your digital assets. Store and encrypt your coins, passwords and other digital keys with confidence. The Trezor Model T now supports over 500 cryptocurrencies.
Blockbook MainNet & TestNet Block Explorer
Blockbook is an open-source Groestlcoin blockchain explorer with complete REST and websocket APIs that can be used for writing web wallets and other apps that need more advanced blockchain queries than provided by groestlcoind RPC. Blockbook REST API provides you with a convenient, powerful and simple way to read data from the groestlcoin network and with it, build your own services.
Support to broadcast transactions online. Broadcast a raw transaction in hex format over the Groestlcoin network.
Supports every web browser
API – Complete REST and Websocket API for querying blocks, transactions and addresses; and receiving live updates
Light – Thin data model using groestlcoind RPC interface to validate blockchain information. Fast groestlcoind blockchain synchronisation (~1hrs for the entire mainnet), using RocksDB for data storage and optionally raw groestlcoind data files processing.
Exhaustive – Reports on double spend attempts, outpoint confirmations, outputs spend status reports. Input and Output hyperlinks in transactions. Extended view in transactions to show advanced details.
Open Source, written in the Go programming language.
Groestlcoin has been added to the Edge wallet for Android and iOS. Edge wallet is secure, private and intuitive. By including support for ShapeShift, Simplex and Changelly, Edge allows you to seamlessly shift between digital currencies, anywhere with an internet connection.
Multi-Asset Support. Supporting Bitcoin, Ethereum, Groestlcoin and many others, you can safely hold your coins.
Exchange Support – Supporting Shapeshift, Simplex and Changelly enables the user to seamlessly shift between digital currencies as if you were storing your funds on an exchange.
In-app buying and selling, exchange your FIAT for cryptocurrency directly within the app.
Encrypted with a username and password. Seamless login into multiple devices.
Easy, secure access with PIN or fingerprint. Additionally, supporting 2FA authentication.
Client-side encryption – All of your data is encrypted on your device before any of your information touches the Edge servers. Being free from server-side hacks and malware means that your assets are as secure as they can be.
We are excited to announce that Groestlcoin has been added to CoinID! With integrated cold and hot wallet support, and a host of other unique wallet features, CoinID can easily become your go-to wallet for storing Groestlcoin. More details can be found here: https://coinid.org/s/groestlcoin-wallet-overview.pdf
Integrated Cold wallet. Store your funds offline and sleep tight at night. All you need is a separate Android or iOS device.
Transaction Batching – A feature normally reserved for exchanges, CoinID supports transaction batching, allowing the user to group transactions into one, saving space on the blockchain and lowering your transaction fees considerably as a result.
Complete control – Your private keys never leaves your device. "If you don’t control your private keys, you don’t own your coins".
SegWit support – Support for Segregated Witness, which means smaller transaction sizes, lower fees, and supporting all 3 address types (grs1, 3, F).
Hierarchical Deterministic – Use a single set of keys for multiple coins and addresses. When an address is used, a new one is generated.
Cross-Platform – Built with React Native for rapid development cycles and cross-platform support.
The Groestlcoin BIP39 tool is an open-source web tool for converting BIP39 mnemonic codes to addresses and private keys. This enables the greatest security against third-party wallets potentially disappearing – You’ll still have access to your funds thanks to this tool. What’s New
Added Coinomi, Ledger Client, Groestlcoinomi, Trezor, Safe T, Core, Groestlpay and Samourai to BIP32 Tab
Added BIP49 support
Add BIP38 support
Add CSV tab for derived addresses
BIP84 tab for derivation path
Display version number in top right corner
Groestlcoin ticker is now also displayed
Refactor method to clear old data from the display
BIP44 ‘purpose’ and ‘coin’ fields have been made read only
Tab Order is now alphabetical
Improve showing feedback for pending calculations
Show error when using XPUB with hardened addresses
Rename variables for clarity between BIP49 and P2WPKH Nested in P2SH
QR Codes use correctLevel 3 instead of 2
Update compile script to work across python 2 and 3
Add BIP49 to More Info section
Reword entropy text to indicate using a single source only
Detect and warn when entropy is filtered / discarded
Use new xpub/xprv prefixes for Segwit BIP49
Allow more rows to be generated starting from a custom index
BIP141 tab added for full Segwit compatibility
Show list of word indexes. Checksum shows in entropy details
Populate entropy field with hex value used from PRNG
QR codes with accents now work correctly by replacing jquery.qrcode with kjua
Allow initial number of rows to be set by the user
Raw entropy shows groupings with space every 11 bits for easier usage
Warn that entropy values should exclude checksum
Warn when generating low entropy mnemonics
Warn when overriding weak entropy with a strong mnemonic length
Allow XPUB to be used as root key for Segwit derivations
Add visual privacy safeguard. List alternative tools
Update bootstrap from 3.2.0 to 3.3.7 and jQuery from 2.1.1 to 3.2.1
GroestlcoinJS library upgraded to v3.3.2
General code refactoring, numerous performance improvements and bug fixes
Electrum-GRS is a lightweight "thin client" Groestlcoin wallet Windows, MacOS and Linux based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain. What’s New
HARDWARE WALLET SUPPORT: Archos Safe-T Mini is now fully supported
Electrum + Android Version 3.2.3:
If a BIP39 seed extension/passphrase contained multiple consecutive whitespaces or leading/trailing whitespaces, then the derived addresses were not following spec. This has been fixed, and anyone affected should move their codes. The wizard will show a warning in this case.
The PRNG used has been changed
Fix Linux distributable, ‘typing’ was not bundled and was required for Python 3.4
Fix spending from Segwit multi-sig wallets involving a Trezor co-signer when using a custom derivation path.
Several other minor bugfixes and usability improvements.
ivendPay and Groestlcoin cryptocurrency have announced the start of integration. IT company ivendPay, the developer of a universal multicurrency payment module for automatic and retail trade, intends to integrate Groestlcoin cryptocurrency — one of the oldest and the most reputable Bitcoin forks into the payment system. Groestlcoin is characterized by instant transactions with almost zero commission and is optimal for mass retail trade where micropayments are mostly used. According to Sergey Danilov, founder and CEO of ivendPay, Groestlcoin will become the 11th cryptocurrency integrated into the payment module. The first working vending machines for the sale of coffee, snacks and souvenirs, equipped with ivendPay modules, served the visitors of the CryptoEvent RIW exhibition at VDNKh in Moscow and accepted Bitcoin, Go Byte, Dash, Bitcoin Cash, Ethereum, Ethereum Classic, Zcash, Bitcoin Gold, Dogecoin and Emercoin. ivendPay terminals are designed and patented to accept payments in electronic money, cryptocurrencies and cash when connecting the corresponding cash terminal. Payment for the purchase takes a few seconds, the choice of the payment currency occurs at the time of placing the order on the screen, the payment is made by QR-code through the cryptocurrency wallet on the smartphone. The interest in equipping vending machines with ivendPay terminals has already been shown by the companies of Malaysia and Israel, where first test networks would be installed. ivendPay compiles a waiting list for vending networks interested in buying terminals and searches for an investor to launch industrial production. According to Sergey Danilov, the universal payment terminal ivendPay for the vending machine will cost about $500. The founder of ivendPay has welcomed the appearance of Groestlcoin among integrated cryptocurrencies, as it is another step towards the realization of the basic idea of digital money - free and cross-border access to goods and services for everybody.
I have been reading a lot of misconceptions about hardware wallets the last few days, so I decided to make a quick FAQ that hopefully clears up a few things for people. I am definitely not an expert, but I have a solid tech background and currently work for a software security solutions company. I have done extensive research on security in the crypto space before I made my first transactions. Since I own a Ledger Nano S myself, some information might be about Ledger in particular, although I will try to keep it as general and simple as possible.
Some quick terminology used further on:
recovery seed: secret phrase of which one or more private keys are generated.
private key: this key is required to sign the transactions that you send from your wallet to a different address, i.e. send funds.
public key: generated from the private key, used by the network to verify your transactions.
address: generated from the public key. You can freely give this to other people to receive funds.
pincode: hardware wallets require a pincode to log into the device and access your funds.
Q: Do hardware wallets provide extra security compared to other wallets? A: Yes. Many people think that hardware wallets are only useful for convenience. While they are indeed very convenient to make transactions with, there is also a big reason to use them from a security viewpoint. When you generate a new wallet on your device, a new keypair is created, derived from the recovery seed. The private key is securely stored inside your device. Now let's say you want to make a transaction from this wallet. You connect the device to your computer and you initiate a transaction. Instead of signing the transaction on your computer with the private key, the transaction itself goes into the device. The transaction is then signed (after verification) inside the device using the secured private key. Lastly, the signed transaction is transmitted from your device back to your computer where it can be sent to the network. The key point here, is that YOUR PRIVATE KEY CAN NEVER LEAVE YOUR DEVICE, under any circumstance. Let's compare this with some other common types of wallets:
Wallets on exchanges or other online wallets: your private key is floating around (hopefully encrypted) somewhere on the host servers. Very unsecure.
Pseudo-offline wallets like MyEtherWallet: your private key is only stored (encrypted) on your computer and nowhere else. To generate or import your wallet you need to be connected to the Internet however (there is a way to generate a MEW wallet offline aswell, but it's quite complicated). Also, if your computer itself gets compromised (malware, keyloggers), access to the private key could be exposed.
Fully offline wallets, cold storage (desktop wallets or paper wallets): If you generate your wallet on a computer with a clean operating system install, which has never been connected to the Internet, you should be fine. You do need back-ups in case of hardware failure (also, don't let 'the computer repair people' steal your stuff when you ask them to fix your computer). Paper wallets are also quite safe, provided that you have proper bookkeeping of all your wallets. Human error is the biggest security risk here.
Q: Hardware can fail. Do I lose my funds if my hardware wallet breaks down? A: No. Hardware can indeed short-circuit, burn down or get eaten by your dog. Remember that there are no actual funds on your device. All it contains is your private key, which was originally generated from your recovery seed. If your device dies, simply import your recovery seed into a new wallet and the same private key gets generated again for you, giving you access to all the funds you had.
Q: What if the company producing my hardware wallet goes out of business and I can't buy new devices to replace my broken ones anymore? A: Your recovery seed is not just generated from a bunch of words that that particular company has made up. Recovery seeds are generated from an industry standard protocol, which means that you can import the seed into any wallet that supports the standard. Ledger for example follows the BIP39 blockchain protocol, which is supported by a wide variety of online and offline wallets.
Q: Is it safe to use my hardware wallet with an infected computer? A: Yes. Your private key is safe. Any private key related activity happens within a secure element on the device. Malware can not infiltrate and access your private key. The only thing malware can do is change the address to which you want to send funds right before the transaction enters the device. Both the TREZOR and the Ledger have a screen on which every transaction will be displayed, asking for your confirmation. You can easily visually verify if the transaction destination address is the address you want to send your funds to.
Q: How do I keep my hardware wallet safe? A: The absolute most important thing about your hardware wallet is your recovery seed. Keep this safe at all times and never show it to anyone. You don't need to worry about the private key, since that's securely stored in the device anyway. If your device gets stolen, no big deal. The thief cannot access your wallet without the pincode. If you forget your pincode, no big deal. Just regenerate your wallet using your recovery seed and pick a new pincode. I would also advise adding a small extra layer of security by making a small variation in your recovery seed when you write it down. Swap around two words or better yet, replace a word by a different word from the particular protocol's word list (do not just make up a word yourself, it needs to be a word available within the protocol). Keep this extra security layer simple though, since you need to remember it. You wouldn't be the first one that got lost in his own masterfully fabricated security contraptions. Some people don't even write down their recovery seed and just think they will remember it forever. Write it down, you will not remember it.
Q: What hardware wallet should I buy? A: The most popular and reputable hardware wallets are currently Ledger Nano S and TREZOR. I would advise buying either of those. Which one is up to your personal preference. They are very similar from a technical viewpoint. I would argue the Ledger is a bit more user friendly.
Q: Where should I buy my hardware wallet? A: If you want to be as safe as possible, buy it from the official website. Official retailers should be fine too. Do not buy anywhere else. In the case of Ledger, if you buy a device, the box won't have any seals. Don't panic, that is completely fine, because the device itself is actually fully tamper proof. If an organisation had enough know-how to intercept your package, replace the firmware of your hardware wallet by some rogue software which would allow them to empty your wallet, don’t you think it would be trivial for them to duplicate and replace a piece of colored tape, giving you a false impression of security? Tampering with the device in any shape or form will simply terminate the device from being functional. No silly seal nonsense required. You can find more information on how this works technically here. The only way you can mess up purchasing your device safely is due to human error. An example is using a pre-generated seed that came with the packaging, as in the case of someone that bought a device on Ebay. ALWAYS GENERATE A NEW WALLET on the device.
Feel free to add any questions or corrections in the comments. I will try to keep this FAQ updated. You can also find me on Twitch or the PRPS discord under the username 'Pureacc'.
Best way to generate Monero Seed or keys to be ported to Ledger?
I have moved almost all my crypto other than Monero to addresses associated with my 24 word BIP39 mnemonic I use with my Ledger Nano S. Up until now I have stored my Monero on mostly exchanges (I know...) because of the complexities of securing it offline and tracking address balances. I am in the process of finally coming up to speed about the details of how to do this with the tools today, but I would like to come up with a solution that is compatible with the Ledger Nano S once it is officially supported. Is there a good way to use some information from the standard Bitcoin HD mnemonic so that my Monero Keys can be generated from the same information? I found this Monero Wallet Generator that uses Dice for entropy. I saved the dice rolls used to generate my standard BIP39 menominc that I use for other cryptocurrencies (plus it can be work back from the seed with the knowledge of the dice roll method I used), so I was thinking of just using this tool with the first 96 dice rolls used to generate my non-Monero seed. Has anyone used this tool before, and can it be trusted? I t looks like the creator "JollyMort" is a Monero contributor, so I assume the third party risk is minimal. The other thing I was thinking is use number the BIP39 and convert to the Monero dictionary, wrapping around if the number is larger than 1626. Do one of these methods seem reasonable? Is there a better way to do this? I am assuming there must be some standard way that the Ledger wallet will be doing this conversion with a standard BIP39 seed internally to enable Monero support. Does anyone know how this is being done?
A cryptoforker's guide to free money - Part 1 (The holy ymgve script + what and where to exchange)
EDIT: a new version of this guide, multilingual and featuring a wallet checker (input your IP, see what you can fork and how much it is worth) is available at https://cryptodom.org
Hello my lovely forkers! A while ago I made a post A cryptoforker's guide to free money - Part 2 (Coinomi, Bither, Bitpie, Walleting Services) where I explained how I used a combination of COINOMI and BITPIE (together with DIG WALLETING SERVICES) to get hold of most forked coins - And then how I sold them (main sites used: GATE.IO / BTCTRADE.COM / BIT-Z.COM / EXRATES.ME / COINEX.COM). Please refer to that for the instructions regarding Bither and Coinomi. QUICK NOTE: If you are a seasoned forker, just look at point 4 and see if your pokem… I mean fork coins collection is complete :-p / If instead you are a total newbie, remember you can just do the “PREPARATION” part and then claim through DIG WALLETING (affiliate link: https://dig.walleting.services/#/aff/o5YP75ALDORdaAbmrJJx NON affiliate link: https://dig.walleting.services/# ) if the process is too hard/long/risky - these guys are reliable and provide a great service, especially for those who have a plethora of transactions and would need to hunt down every last key manually - they have a Reddit, too: you can reach them at Walleting_Services . BEFORE YOU START: What is a fork? Is it really free money? Imagine you had a bank account at BTCbank and a card for it. Tomorrow BTCbank splits and half of its branches become BTC2bank. Nothing changes for you as a client of BTCbank, however there is something you can now do. You can move your money from your BTCbank account to a new BTCbank account, in practice making the card for your former account useless in the BTNbank branches but… NOT IN THE BTN2bank branches! So you can go there and get the equivalent of what you had in “free” money. Nothing illegal, nothing shady, no bugs or exploits: it’s all there by design. Keeping with the example though, it should be specified that you must have the “card” of your BTCbank, which in this case is a private key. If you have your BTC stored on papehardware wallet or anywhere else where you are in direct control of your private keys, well done! Those keys are your BTCbank card(s). If, on the other hand, you held your money on an exchange (Binance, Bitfinex, Bittrex, you name it), then your only chance is to wait and hope that the exchange decides to support the coin and gives you your share. It’s not impossible but it introduces a middleman. It’s like you are asking your uncle to have an account in his name at BTCbank and there is no guarantee that uncle will go to a new branch of BTNbank2 and use the card trick to get the free money and give it to you, no matter how much you ask him to. He could do it, he could not: it’s uncle’s call. PREPARATION: First of all, a question: are you after the fork money to exchange it yourself or do you just want to claim it but want someone else to do all the exchange part for you? If you want to squeeze every last bit out of it, get ready to sign up to a few Chinese exchanges! You might as well do this now before you start, otherwise you’ll get stuck at the cashing part. Same goes for the script. No target address, no script. I warned you :) Anyway, here’s the list: • GATE.IO • BTCTRADE.IM • COINEX.COM • EXRATES.ME • TRADESATOSHI.COM • BIT-Z.COM My personal favourite is GATE.IO, despite the 60 confirmations (up to 14 hours), but they all helped me one way or another, and most importantly they all allow withdrawal (BTCTRADE.IM wanted verification papers, the others didn’t). Also, make sure to have Coinomi, Bither and Bitpie installed on an Android phone. STEP 1 - THE GOLDEN RULE Just like in the previous post, let me start off by warning everyone: what are you about to do is dangerous. You could lose your bitcoins. Are you scared? You should be, cause the threat is real. Nobody wants to lose 1 BTC to try and claim a few tens/hundreds of dollars, right? So, first and foremost, make sure that you MOVE your coins from wherever they are (ideally, an offline wallet like a ledger or a trezor), and then, once the wallet is empty, feel free to play around with its private keys, that will hopefully show some transferrable balance at the time of the fork. STEP 2 - GETTING YOUR KEYS - https://iancoleman.io/bip39/ For getting the keys, this is your number one option - with an offline version for paranoid available, no less. Use the seed (those 24 words in the case of ledger, for example) and after the calculation go get your keys in the chart at the end of the page. In case you have segwit addresses or special scenarios (like a wallet with a lot of operations over a long time), getting the keys, or the “right” keys, might take a while. Anyway: let’s look at the first line of the chart. In the first column you will find the address: copy and paste it onto https://blockchain.info/ and press enter to get the transaction history for that given address. Let’s suppose for the sake of this example that our address shows 2 transactions: one inbound for 2 BTC 1 year ago and anther one for the outgoing BTC 5 minutes ago (because before we started this we DID move them out, right?!?). What that means is that at the time of the forkS (in this case we’d get money from most of them) we had 2 BTC on that address. Great, so it’s loaded, and we need its key. Let’s go back to the chart on line one and let’s have a look at the third column: this is our private key. We will use it later to sweep or import in the various method outlined. STEP 3 - THE SCRIPT - https://github.com/ymgve/bitcoin_fork_claimer If you have ben around this subreddit long enough you surely read about the script… And spared a tender thought for ymgve who made this possible. Yet, no one really explains properly how to use it. Unfortunately I do not have the time to explain how to get python installed and running on a machine, you will have to figure it out on your own. Same goes for the fact that you might need to write “py” or “python” before the actual “claimer.py (…)” command. Let’s say you somehow get ready to run the script - now you do have a series of examples on the github page, but they are not so easy to understand for the uninitiated. Here is the relevant quote: In blockchain.info mode it uses the blockchain.info API to query and validate information about the transaction you're spending from. This only works for transferring/claiming coins that existed on the BTC main chain pre-fork. SYNTAX: * claimer.py
Here is how to create SegWit BIP49 wallets and addresses in Electrum.
Posted this earlier as a comment in /bitcoin -- hopefully this can help some of you here as well. So, with the way Electrum sets up SegWit wallets, most mining pools and exchanges don't yet recognize the addresses. This is because Electrum uses "full-SegWit" bech32 implementation. In order to work around this, you can create the more "backwards-compatible friendly" BIP49 implementation of a SegWit wallet via Ian Coleman's website then import into Electrum. The downside to the BIP49 implementation is that your SegWit transactions are 10% larger than bech32 SegWit. The upside is that Slush Pool and loads of other sites will send those sweet BTC payouts to a BIP49 address. Here's a step-by-step. Note: Please take all available security precautions when generating your seed--VPN, https, firewalls, etc.
Click "BIP49 derivation path" and generate. Those fifteen words are your wallet seed.
In Electrum, FileNew/RestoreStandard wallet and click "Next"
Select "I already have a seed" and click "Next"
Click "Options" box and check "BIP39" Seed then click OK
input fifteen words from Ian Coleman's site and click "Next"
On the "Derivation" screen, replace m/44'/0'/0' with m/49'/0'/0' and click "Next"
If you want wallet key encryption (STRONGLY RECOMMENDED) enter a strong password and store it somewhere safe, then click "Next"
Look at your wallet's addresses: they should all begin with "3" (if they don't, start over with a new seed).
Enjoy your new SegWit backwards-compatible P2SH-P2PKH wallet.
Donations: 3LQ2QWQHcYaCAfNXBuoXygmsKAGGJEa7rW EDIT: If you have a Trezor or Nano S with Segwit, you can basically follow this guide without any Seed Generation and replace "I already have a seed" in step 4 with "Use a hardware device."
16. COLDCARD Passphrase (BIP39) features. Using it, Locking it down, and encrypted MicroSD.
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