Okay so for fun, for newbies and perhaps even new to some of us more seasoned crypto heads (is that a thing?) how about posting some lingo or terminology that relates to the culture of Bitcoin or even something you may have ‘coined’ yourself?

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.
• Open source. if you check our github, you can see around 10 public repositories in the last few months. We have forked and modified several popular Javascript crypto libraries so they share the underlying core crypto libraries. We did this to reduce the attack surface, the code size related to crypto libraries, and make them all compatible with various environments such as React Native. Examples are hdkey, elliptic, tweetnacl-js, bs58check, bip39, and more. We have also contributed to Binance chain ecosystem by creating a transaction parser that their JavaScript SDK was lacking.
• 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

Introduction

Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.

• 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 (https://github.com/groestlcoin/groestlcoin/blob/mastedoc/groestlcoin-conf.md) about the groestlcoin.conf file describes how to use it to configure Groestlcoin Core.
• 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:
  1. If a blockhash is provided, check the corresponding block.
  2. If no blockhash is provided, check the mempool.
  3. 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

Other Linux

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

Download

Download the Windows Installer (64 bit) here
Download the Windows Installer (32 bit) here
Download the Windows binaries (64 bit) here
Download the Windows binaries (32 bit) here
Download the OSX Installer here
Download the OSX binaries here
Download the Linux binaries (64 bit) here
Download the Linux binaries (32 bit) here
Download the ARM Linux binaries (64 bit) here
Download the ARM Linux binaries (32 bit) here

Source

ALL NEW - Groestlcoin Moonshine iOS/Android Wallet

Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network.
GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.

Features

• Groestlcoin Mainnet & Testnet supported
• Bech32 support
• Multiple wallet support
• Electrum - Support for both random and custom peers
• Encrypted storage
• Biometric + Pin authentication
• Custom fee selection
• Import mnemonic phrases via manual entry or scanning
• RBF functionality
• 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.
• Ability to Broadcast raw transactions

Download

iOS
Android

Source

ALL NEW! – HODL GRS Android Wallet

HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled.
HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user.
Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.

Features

• Simplified payment verification for fast mobile performance
• No server to get hacked or go down
• Single backup phrase that works forever
• Private keys never leave your device
• Import password protected paper wallets
• Payment protocol payee identity certification

Download

Main Release (Main Net)
Testnet Release

Source

ALL NEW! – GroestlcoinSeed Savior

Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases.
This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats.
To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.

Features

• 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.

Live Version (Not Recommended)

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

Download

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

Source

ALL NEW! – Vanity Search Vanity Address Generator

NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator.
VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address.
VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase.
VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).

Features

• 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)
• Multi-GPU support
• CUDA optimisation via inline PTX assembly
• Seed protected by pbkdf2_hmac_sha512 (BIP38)
• Support P2PKH, P2SH and BECH32 addresses
• Support split-key vanity address

Usage

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

Download

Source

ALL NEW! – Groestlcoin EasyVanity 2020

Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet.
If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).

Features

• 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.

Download

Source

Remastered! – Groestlcoin WPF Desktop Wallet (v2.19.0.18)

Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode.
This wallet was previously deprecated but has been brought back to life with modern standards.

Features

• 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

Remastered Improvements

• Bech32 support
• P2sh support
• Fixed Import/Export to wallet.dat
• Testnet Support
• 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.

Download

Source

ALL NEW! – BIP39 Key Tool

Groestlcoin BIP39 Key Tool is a GUI interface for generating Groestlcoin public and private keys. It is a standalone tool which can be used offline.

Features

• Selection options for 3-24 words (simply putting the space separated words in the first word box will also work) along with a bip39 passphrase
• User input for total number of addresses desired
• Creation of P2PKH, P2SH, P2WPKH and P2WSH addresses along with xpriv and xpub as per BIP32 spec, using a word list as the starting point following the BIP39 standard.
• Pre-sets for BIP44, BIP49, BIP84 and BIP141 standards, along with custom user input for derivation path
• Option for Hardened or non-hardened addresses
• Option for Testnet private and public keys
• Output containing derivation path, private key in WIF, integer and hex format, public key address, public point on curve and scriptpubkey
• Results are output in a file titled 'wallet.txt' with the time addresses were generated, along with all information presented onscreen

Download

Windows
Linux :

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

Source

ALL NEW! – Electrum Personal Server

Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node.
It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node.
Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine.
Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in.
Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet.
Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.

Features

• Use your own node
• Tor support
• 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

Download

Windows
Linux / OSX (Instructions)

Source

UPDATED – Android Wallet 7.38.1 - Main Net + Test Net

The app allows you to send and receive Groestlcoin on your device using QR codes and URI links.
When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.

Changes

• 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.

Download

Main Net
Main Net (FDroid)
Test Net

Source

UPDATED – Groestlcoin Sentinel 3.5.06 (Android)

Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets).
Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.

Changes

• Removed Cryptopia
• Added adaptive icons for Android 8 and above
• Add block book block explorer

Download

Source

UPDATED – P2Pool Test Net

Changes

• Add compatibility for Groestlcoin Core 2.18.2

Download

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

Source

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

Just look at the disaster with Yours.org. Many people didn't write down their Yours.org seed words, and now they're locked out of their Yours.org BCH balances.
The path forward should probably be through the Telescope browser add-on or badgerwallet.cash wallet, with seed word importation. Telescope project is currently managed by u/adangert and funded by Bitmain.
This way, people can maintain one big BCH balance on a hardware wallet (like Ledger), and a smaller "spending" BCH balance on a Bitpay-compatible wallet, like Bitcoin.com wallet.
Import the Bitcoin.com wallet BCH seed words (BIP39; derivation path m/44'/0'/0') into Telescope, and people could then do all their spending from one BCH balance & seed words that they control.

• Use Bitcoin.com wallet to buy something from a Bitpay-compatible merchant, like NewEgg.com, NameCheap.com, Apmex.com, etc.
  
• Use Bitcoin.com wallet on your smartphone to pay your friend for lunch, face-to-face.
  
• Use the Telescope browser add-on to click & tip your favorite youtubers & bloggers, wherever they post a BCH address in plain text.
  
• Use the Telescope browser add-on to upvote & tip on BCH-based social media sites (like memo.cash, blockpress.com, yours.org, honest.cash, etc). BCH-based sites could give people the option to click their mouse to upvote or tip, and if the Telescope browser add-on sends the right BCH payment, the upvote or tip is registered by the website. With BCH & 0-conf, this should be able to work.
  
• Use the Telescope browser add-on to upvote & tip on BCH-based moneybutton-style services (like Gateway.cash). Same as above, with 0-conf.
  
• All of the above functions would operate off of one BCH balance & set of seed words, stored only in software wallets (like Bitcoin.com wallet, and Telescope browser add-on wallet), and give users the option to keep their wallets & seed words away from social media websites.
  
• If ANY of those above websites or services freeze up or disappear, it's no big deal, because you still have full access to your BCH balance & seed words on your Bitcoin.com wallet.
  
• If you need to manage any forked coins (like BSV), you can import the seed words into Electron Cash wallet, split & send coins, etc. Electron Cash will also be able to use CashShuffle, when you want to donate anonymously to controversial youtubers & bloggers.
  

IMHO, that would make the BCH ecosystem more scalable for normie users.

I have a case here where a client of mine used a BitCoin ATM, and inadvertently used the 'BitCoin CASH' option instead of 'BitCoin', when he was using himself a Mycelium HD Wallet on a SegWit Address. Mistakes were made, but we have held onto the hope that at somepoint recovery would be possible.
​
With the May 15 Fork and the addition of SegWit recovery to the BitcoinABC codebase, recovery became possible, and the BCH chain survived an attempt at a double-spend attack by some thrifty miner(s) who realized that they could swoop in and take some of these trapped coins.
​
Since then, a couple guides have arisen that give an explanation of how to do a recovery, if those BCH sent to a 3xxxx Segwit address have the correct 'things', primarily a corresponding private key.
​
Here is my question/problem --- my BCH wallet is an HD Wallet created in Mycellium, and this was the 2nd 'account' in the wallet, and the 'second' key in that account. The BCH Derivation code is m/49'/0'/1'/0/1 . Problem is, I can only find a private key corresponding to the p2wskh-ps2h: key, and the p2sh: key in not importable in to Electron Cash wallet. How can I find a private key that corresponds to that wallet location in Electron Cash?
​
Here are some details:
3CSUDH5yW1KHJmMDHfCCWShWgJkbVnfvnJ
address the BCH was sent to... now, this address had BCH AND BTC sent to it at some point, and the BTC was spent, revealing the public key hash.
18dWL1ANKPwrhnbvNhrTDy8sxUzDGZ7YH2 is the 'legacy address' that Electron Cash spits out when I put the p2wskh-ps2h:"private key'
​
bitcoincash:pp67j94cfvnfg727etymlst9jts3uhfdkurqvtj2un is the public key address that Electron Cash shows the transaction occured on. If you put that key into the Electron Cash as a 'watch only' wallet, it still shows a 0.58 BCH Balance.
​
Problem is, I can't find out how to retrieve the private key for this address... the private key for 3CSUDH5yW1KHJmMDHfCCWShWgJkbVnfvnJ just gives the 18dWL1ANKPwrhnbvNhrTDy8sxUzDGZ7YH2 address in Electron Cash instead of bitcoincash:pp67j94cfvnfg727etymlst9jts3uhfdkurqvtj2un ....
​
Anyone think that have a hint where to check next? I have tried the BIP39 recovery site and can generate xprv/yprv keys, but none of these seem to be giving me the private key needed for the Derivation set of the HD wallet. Any help would be greatly appreciated!

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.

Recap

• 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!

What's New

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.

Head over to the Groestlcoin Samourai Release Page here for the full release announcement.

New: GroestlImage

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.

Features:

• Turn any image, document or audio file into a BIP39 mnemonic phrase
• Add a BIP39 Passphrase
• Open source under MIT

Link

https://groestlcoin.org/groestlimage/

Source Code

https://github.com/Groestlcoin/groestlimage

New: Groestlcoin Core Config Generator

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.

Features

• Choose between Mining, Non-Standard Ports, Low Bandwidth, Pruned, Raspberry Pi, Tor, Testnet, Regtest, Non-Syncing and Lightning Éclair presets.
• Open-Source under GPL
• 140 Configuration options to choose from

Link

https://config.groestlcoin.org/

Source Code

https://github.com/Groestlcoin/groestlcoin-core-config-generator

New: Groestlcoin Dumb Block Explorer

Dumb Block Explorer is a trivial block explorer written in a single PHP file. Now everybody can run their own block explorer.

Features

• Search for a hash or block height
• Option to show RAW Json for transactions
• Supports Mainnet and Testnet
• Works with Groestlcoin Core with enabled REST interface (-rest)
• Works with or without txindex
• Works with pruning
• Does UTXO lookups

Link

https://www.groestlcoin.org/explore

Source Code

https://github.com/Groestlcoin/dumb-block-explorer

New: Groestlcoin SMS Push TX

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).

Features

• Ability to push either Base64 or Hex-Encoded Raw Transactions via SMS.
• Send SMS transactions to PushTX through the number +32460224477 (+32460224GRS)

Source Code

https://github.com/Groestlcoin/smspushtx

Update: Electrum-GRS 3.3.6

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
• Hardware Wallets:
  • Ledger Nano X is now recognised, supporting mainnet and testnet
  • KeepKey
  • KeepKey is now recognised and supports mainnet and testnet
  • Device was not getting detected using Windows binary
  • Support Firmware 6.0.0+
  • Trezor
  • 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

Link

https://github.com/Groestlcoin/electrum-grs/releases/download
https://play.google.com/store/apps/details?id=org.groestlcoin.electrumgrs

Source Code

https://github.com/Groestlcoin/electrum-grs

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

• 01: People unsurprisingly spend the day making April fools jokes about Bitcoin
• 02: A list of all words used to generate 24-word bitcoin seeds with 10⁷² combinations
• 03: The 0.4.1 beta version of Lightning Network implementation Lnd is released
• 04: Mark Karpeles, ex-CEO of Mt. Gox does an AMA & Eclair’s Lightning Network wallet is released for mainnet on Android
• 05: Satoshi Nakamoto chose this date as his birthday as a reference to gold confiscation from US citizens
• 06: Electrum is adding support for the Lightning Network & Nick Szabo on some of the basic concepts of a blockchain 14 years before bitcoin’s release & The SEC allows Bitcoin ETF proposals again & Elizabeth Stark, CEO of Lightning Labs on Yahoo Finance
• 07: People argue over an infographic on technology adoption
• 08: Twitter suspends the @Bitcoin account after it kept tweeting against Bitcoin
• 09: People discuss the value of Technical Analysis for cryptocurrency markets & Someone gets a 1 satoshi tip using the Lightning Network
• 10: People discuss whether Bitcoin is nuanced enough & Canadian banks ban cryptocurrency purchases resulting in skyrocketing volumes on P2P exchanges
• 11: BitMEX research on Proof-of-Stake viability & HalongMining is a 10nm ASIC fabricated by Samsung semiconductors
• 12: The biggest 1hr volume in the history of Bitcoin happens as the price rises $1000 in an hour
• 13: Developers at Chain make Bulletproofs twice as fast & A community member shares content, tools and advice on cryptocurrency and taxes & Yahoo Japan buys a 40% stake in cryptocurrency exchange BitARG
• 14: Bitcoin is declared legal under Islamic law
• 15: Bitcoin reaches 800k subscribers
• 16: A 2-minute reminder of how the banking system works & Coinbase buys Earn.com
• 17: IMF Director Lagarde makes positive comments about cryptocurrencies & Someone is looking to make a Lightning and NFC integration for in-store payments
• 18: Analysis on the age distribution of unspent transaction outputs throughout time
• 19: A reminder that Amazon filed a patent in 2014 to de-anonymize bitcoin transactions and sell the data to law enforcement
• 20: Benedikt Bunz and Pieter Wuille on Bulletproofs & Bitwage integrates SegWit
• 21: The Eclair Lightning Network wallet is improving & A deep dive into Lit: A Lightning Network implementation
• 22: The high court in India is discussing the Bitcoin ban with the Central Bank of India
• 23: The Lightning Network reaches 2000 nodes, $150K capacity and 7000 active channels & Ken Sheriff is repurposing vitage computers to mine bitcoins & You can buy Reddit Gold with bitcoin again
• 24: Exploring the Lightning Network Daemon 0.4 Beta release
• 25: The Nasdaq CEO says they are open to becoming a cryptocurrency exchange & Misleading references get removed from the Bitcoin Wikipedia article
• 26: The 17 millionth Bitcoin has been mined & A guide to using BTCPay, a free and open-source Bitcoin payment processor
• 27: Hundreds of Bitcoin users seek lawsuit against Bitcoin.com for misleading visitors
• 28: Bitcoin was the 9th most read article on Wikipedia in 2017 & France reduces the tax rate on cryptocurrency sales from 45% to 19%
• 29: The government of the Philippines will allow ten cryptocurrency companies to operate in a special economic zone in Cagayan
• 30: Eltoo: a simplified update mechanism for Lightning and off-chain contracts & A beginner’s guide to Lightning on a Raspberry Pi

[Dev-Happy] Blondfrogs05/10/2019
Channel should be open now
Chill05/10/2019
you all rock!
just getting that out of the way :wink:
Tron05/10/2019
Cheers everyone.
theking05/10/2019
Hi fabulous dev team!
Hans_Schmidt05/10/2019
Howdy!
Tron05/10/2019
No specific agenda today.
Questions?
Has everyone seen Zelcore wallet, and Spend app?
theDopeMedic05/10/2019
Any major development status updates that haven't been listed in #news?
Synicide05/10/2019
How was the meetup yesterday? I heard it would be recorded, it is uploaded anywhere yet?
Tron05/10/2019
And Trezor support on Mango Farm assets?
@Synicide Yes it was recorded. The Bitcoin meetup organizer has the video.
I talked about Ravencoin, but mostly about the stuff that was being built on/with/for Ravencoin.
There was about 70% overlap with folks who were at the Ravencoin meetup in March.
Synicide05/10/2019
awesome, looking forward to watching it when it's available
Tron05/10/2019
I'll hit up James and see if he's posting the video.
S1LVA | GetRavencoin.org05/10/2019
@theDopeMedic I'd follow github if youre interested in development status
Synicide05/10/2019
zelcore looks super slick. Been meaning to research its security more with the username/pw being stored on device
Chill05/10/2019
How is the progress on the restricted assets and testnet coming along? A secondary question would be about the approximate fork timeframe.
S1LVA | GetRavencoin.org05/10/2019
Has anyone heard from the community dev (BW) working on Dividends?
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Any word on BW and his progress w dividends?
@S1LVA | GetRavencoin.org LOL
Tron05/10/2019
@S1LVA | GetRavencoin.org Great question. I haven't heard.
Synicide05/10/2019
last meeting BlondFrogs said he would try to connect with BW as he was sick with the flu at the time. Maybe he has an update
S1LVA | GetRavencoin.org05/10/2019
I've tried to get in contact, but with no success.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Got a funny feeling...
Jeroz05/10/2019
Last time we left off with someone mentioning a foundation and Tron saying let’s discuss that next time iirc
kryptoshi05/10/2019
Has anyone taken a look at the merits for this proposal? Thoughts? https://medium.com/systems-nexus/modified-x16r-algorithm-proposal-for-constant-hash-rate-in-short-time-164711dd9044
Medium
Modified X16R algorithm proposal for constant hash rate in short time
Interpretation Lens V. a0.01
Tron05/10/2019
I did see it. Does anyone think this is a problem?
Synicide05/10/2019
It looks interesting... but I'm not sure what it is trying to solve. Looking at netstats, our 1 hour average block time is perfectly 1 minute
S1LVA | GetRavencoin.org05/10/2019
Last I heard from him he expressed how important finishing the code was. I wouldnt jump to conclusions on his absence within the community.
Synicide05/10/2019
x16r by nature will fluctuate, but DGW seems to be doing a good job keeping consistent block times
Tron05/10/2019
Because of relatively broad distribution across the algorithms, the block times are fairly consistent. It is possible, but very, very unlikely to get a sequence that takes up to 4x longer, but that's super rare, and only 4 minutes.
We did some timing analysis of the algorithms early on. A few are 1/2 as long as SHA-256 and some are up to 4x longer. But when you randomly select 16 it usually comes out about even.
Synicide05/10/2019
1hr avg: 1.02min - 24hr avg: 1min
I think we should focus on building, and not trying to fix what isnt necessarily broken
Tron05/10/2019
Agreed.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Agreed
Tron05/10/2019
Is everyone ok with the frequency (every other week) of this discussion?
Jeroz05/10/2019
(Added thumbs down to measure)
Tron05/10/2019
@Jeroz Did you do thumbs-up and thumbs down?
S1LVA | GetRavencoin.org05/10/2019
Seems appropriate. Its not like the devs dont poke around here and chat anyways.
Tron05/10/2019
Anything critical that we should be aware of?
Jeroz05/10/2019
When I need a dev, I poke a dev. When that dev is unavailable. I poke another one :smiley:
Hans_Schmidt05/10/2019
BlondFrogs was testing some github code last month to create a dividends snapshot database of asset holders at a given blockheight. Is that planned for inclusion? That's the only thing needed for dividends.
Jeroz05/10/2019
I hope I didn’t offend any devs
With poking around
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Was thinking voting would be an excellent use case for restricted assets. Local communities, nations, etc... could kyc their residents
radiodub05/10/2019
Is x16r will remain fpga mineable
Tron05/10/2019
@Jeroz We're hard to offend.
Chill05/10/2019
Is the general dev feeling that the next fork should and will include everything needed for the next 6-9 months (barring something completely unforeseen)?
Jeroz05/10/2019
I know :smile:
Tron05/10/2019
@radiodub Nearly impossible to stop FPGAs and still keep GPUs
Jeroz05/10/2019
About that: voting is another hard fork right? Not too soon?
Tron05/10/2019
FPGAs can be reprogrammed as fast. It is silicon (true ASIC) that we can obsolete with a tiny change.
@Jeroz Messaging, voting, Tags, Restricted Assets would require a hard fork (upgrade).
We could do them each individually, but folks get weary of upgrades, so current plan is to roll them together into one.
MrFanelli™05/10/2019
Good idea
Jeroz05/10/2019
Oh voting too?
MrFanelli™05/10/2019
People will like that
Jeroz05/10/2019
I thought that was coming later
Tron05/10/2019
Voting is the one that isn't being worked on now. Tags and Restricted assets have taken precedence.
Jeroz05/10/2019
I know. But you plan on waiting to fork until voting is also done?
That would have my preference tbh
But I can see an issue with too many things at the same time
Tron05/10/2019
If someone wants to step in, we've had one of our devs sidelined and he was working on BlockBook support so more light wallets can connect to Ravencoin. Mostly test cases needed at this point.
S1LVA | GetRavencoin.org05/10/2019
Thats a pretty large upgrade.. Bigger surface for unknowns
Rikki RATTOE Sr. SEC Impresantor05/10/2019
At what point would RVN community consider moving to ASICs because having a Bitcoin level of security would eventually be needed?
MrFanelli™05/10/2019
Never rikki
Tron05/10/2019
@S1LVA | GetRavencoin.org 100% Lots of testing on testnet and bounties.
[Dev-Happy] Blondfrogs05/10/2019
I am here :smiley:
Tron05/10/2019
@Rikki RATTOE Sr. SEC Impresantor There's nothing inherently wrong with ASICs but it tends to centralize to data centers and less opportunity for anyone to just run their gaming rig overnight and collect RVN.
Welcome Blondfrogs
MrFanelli™05/10/2019
Asics are too expensive. If we want normal people to mine, then we cant be an asic network
Rikki RATTOE Sr. SEC Impresantor05/10/2019
@Tron True but what happens when the chain needs a Bitcoin level of protection?
Tron05/10/2019
More GPUs, more FPGAs
MrFanelli™05/10/2019
Nvidia loves ravencoin :stuck_out_tongue:
Chill05/10/2019
ok, so we are pro FPGAs
𝕿𝖍𝖊 𝕯𝖔𝖓 𝕳𝖆𝖗𝖎𝖘𝖙𝖔 CEO ∞05/10/2019
Build it and they will come
Tron05/10/2019
It's all relative. It is cost to attack. If an ASIC isn't available for rent, then only option is rental of non-allocated GPUs
Rikki RATTOE Sr. SEC Impresantor05/10/2019
@Chill Eventually everyone will need FPGAs to be profitable on RVN, at that point I don't see why we just don't make the switch to ASICs
Tron05/10/2019
Also, as much as we don't focus on price, the price does matter because it determines the amount of electricity and hardware will be deployed to get the block reward. Price increase means more security, more mining means more security means higher price.
It's a circle.
Chill05/10/2019
someone tell that to the twitter handler
HailKira05/10/2019
you guys adding seedphrase to desktop wallet?
[Dev-Happy] Blondfrogs05/10/2019
@HailKira We will, just is not a high priority right now.
MrFanelli™05/10/2019
Twitter handle wants rvn ded
Rikki RATTOE Sr. SEC Impresantor05/10/2019
I just don't see much difference between ASIC and FPGA and I'd rather have the added nethash an ASIC will provide once GPUs are virtually kicked off the network
kryptoshi05/10/2019
I'm at 11 GB future proof
Tron05/10/2019
That also limits miners to big money, not gaming rigs.
Synicide05/10/2019
@Rikki RATTOE Sr. SEC Impresantor you have to keep in mind the 'added nethash' is all relative
Rikki RATTOE Sr. SEC Impresantor05/10/2019
FPGAs will limit miners to big $$$ too IMO
Tron05/10/2019
@kryptoshi New algo x16r-12G requires 12GB :frowning:
Seal <:cricat:> Clubber05/10/2019
But sperating smaller gb cards would lead to less adoption if we ever become a mainstream coin.
Adpotion of mining that is
Chill05/10/2019
but we are a mainstream coin
Seal <:cricat:> Clubber05/10/2019
Mains stream as in what eth did
Tron05/10/2019
@Rikki RATTOE Sr. SEC Impresantor I agree. Not a perfect solution.
Steelers05/10/2019
Is this a Dev meeting or Algo meeting :smiley:
Seal <:cricat:> Clubber05/10/2019
But if we ever go mem lane. We should aim for 6 or 8gb.
Tron05/10/2019
Open to other questions.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
@Tron Probably not the time and the place to have this discussion as we stand currently but IMO we're gonna have this conversation for real eventually
Seal <:cricat:> Clubber05/10/2019
Most cards have 6gb now.
kryptoshi05/10/2019
Why 12 gb ? Such a massive jump
Seal <:cricat:> Clubber05/10/2019
^
Would also like to know
Tron05/10/2019
@kryptoshi I was joking. You said you had 11GB card.
Seal <:cricat:> Clubber05/10/2019
Haha
You got em good
I cant imaghine the face he had when he was 1gb short
Lel
Rikki RATTOE Sr. SEC Impresantor05/10/2019
That's what she said
kryptoshi05/10/2019
Hahaha
MrFanelli™05/10/2019
need a 2080ti
Seal <:cricat:> Clubber05/10/2019
How much does the VII have?
16?
[Dev-Happy] Blondfrogs05/10/2019
Any other questions you have for us?
Hans_Schmidt05/10/2019
@[Dev-Happy] Blondfrogs You were testing some github code last month to create a dividends snapshot database of asset holders at a given blockheight. Is that planned for inclusion? That's the only thing needed for dividends.
Chill05/10/2019
a dev might want to contact Crypto Chico for some 'splaining
[Dev-Happy] Blondfrogs05/10/2019
I still haven't contacted the developer that was working on dividends. Was pretty busy with some other stuff. I will contact him this next week, and see where we are at for that.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Chico doesn't do interviews, shame. Tron would be a much needed interview for his community
[Dev-Happy] Blondfrogs05/10/2019
As far as releasing dividends, I can be released at anytime the code is finished and doesn't require any voting or hardfork to occur
kryptoshi05/10/2019
Android asset aware wallet?
Seal <:cricat:> Clubber05/10/2019
Is in beta right
Tron05/10/2019
Testing went well today on Android. Nearing release.
[Dev-Happy] Blondfrogs05/10/2019
as it is a mechanism that is wallet specific
liqdmetal05/10/2019
no protocol level dividends you guys are saying?
[Dev-Happy] Blondfrogs05/10/2019
correct
Tron05/10/2019
DM me if you want to test Android with Asset support. I'll send you the .APK.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
RVN gonna be on tZero wallet? :yum:
liqdmetal05/10/2019
why not? what is the logic on non-protocol dividends
assets + protocol dividends is nirvana
[Dev-Happy] Blondfrogs05/10/2019
dividends is pretty much sending payments to addresses. Right now, you would have to do this manually. The dividends code, will allow this to be done quicker and easier.
No consensus changes are required.
Tron05/10/2019
New Android wallet is BIP44 and original Android wallet is BIP32/BIP39 so the words will not find the funds. You'll need to send them to another wallet, and then send them to new BIP44 derived address.
liqdmetal05/10/2019
we already have payments to addresses
so dividends is not a feature so much as simple wallet script
Hans_Schmidt05/10/2019
@[Dev-Happy] Blondfrogs The dividend code changes look risky'er to me than messaging. Would you consider "tags" branch test-ready?
[Dev-Happy] Blondfrogs05/10/2019
Not yet @Hans_Schmidt
Dividends is easier then you would think if coded correctly. I still haven't seen the code from the community developer. Excited to view it though.
Hans_Schmidt05/10/2019
@[Dev-Happy] Blondfrogs Sorry- I meant restricted, not dividend
kryptoshi05/10/2019
@Tron on the Android wallet, anyone successfully added their own node and got it to sync faster? Always have issues. I have a supped up node and cannot get it to work with the Android wallet...
[Dev-Happy] Blondfrogs05/10/2019
@Hans_Schmidt Oh, that makes more sense. Yes, they are very risky! That is why we are going to create a new bug bounty program for restricted assets testing.
Rikki RATTOE Sr. SEC Impresantor05/10/2019
Once the network does get flooded w FPGAs, should we even consider changing the algo a couple times a year? That would only give bitstream developers added time to hoard their creations for themselves
Kind of like they're already doing with their x16r bitstreams :yum:
kryptoshi05/10/2019
Flooded... lol... like that hardware has mass production scale like gpus...come on dude
MrFanelli™05/10/2019
Bip44 wallet? :smiley:
Rikki RATTOE Sr. SEC Impresantor05/10/2019
@kryptoshi Eventually yes, where there's $$$ to be made, people make things happen
MrFanelli™05/10/2019
So can we trade from that in the new Binance Dex when RVN get listed?
kryptoshi05/10/2019
@Rikki RATTOE Sr. SEC Impresantor Yes Soon TM lol. :soontm:
Tron05/10/2019
@kryptoshi There are some things we can do to speed it up. For a new wallet, it shouldn't need to sync. For recovered wallet, it needs to sync from beginning of BIP44 wallet support on iOS so words can be moved between the two.
Other options include grabbing the first derived address and looking it up on an explorer to see when it was first used and sync from there.
Another option is to add an optional number with the 12 words so it knows when to start syncing.
There isn't a good reason on an SPV wallet to sync before the seed was created.
kryptoshi05/10/2019
Cool. Glad you are looking at speedup options.. :right_facing_fist: :left_facing_fist:
[Dev-Happy] Blondfrogs05/10/2019
@MrFanelli™ If the binance dex support RVN deposits. I am sure you would be able to send from it
MrFanelli™05/10/2019
Has binance reached out for any info or anything?
I seen that we ranked in some voting competition they had on twitter
for an ama
Rikki RATTOE Sr. SEC Impresantor05/10/2019
I believe we'll need to create a fund of approximately $300,000 in order to get a BNB-RVN asset created and listed on the Binance FDEX
[Dev-Happy] Blondfrogs05/10/2019
In order to work with binance we need Ravencoin integrated into Blockbook.
Tron05/10/2019
@MrFanelli™ I've reached back out to Binance on the AMA.
MrFanelli™05/10/2019
Awesome :smile:
kryptoshi05/10/2019
@Tron you are a natural on the interviews... cool as a cucumber. :sunglasses:
Tron05/10/2019
Thanks @kryptoshi
[Dev-Happy] Blondfrogs05/10/2019
Cool. We are done for today.
Please don't ask us any more questions :smiley:
Tron05/10/2019
Thanks everyone!!!!
[Dev-Happy] Blondfrogs05/10/2019
Cya everyone!!
S1LVA | GetRavencoin.org05/10/2019
Cya happy feet, Thanks
Thanks Tron
Seal <:cricat:> Clubber05/10/2019
:bepbep:

These BCH are now recoverable; please read the update at the end of the post!

 
 

Background

In the short while since segwit activated on the BTC network and segwit addresses even-more-recently became the default for receiving BTC in the Trezor wallet - and perhaps other wallets too (soon?) - people have started accidentally sending their BCH to BTC-segwit addresses.
 
Due to the fact(s) that...
a) the BCH network supports P2SH (i.e. addresses starting with 3), but not segwit
... and ...
b) the sending wallets thus have no way of knowing that P2SH-wrapped segwit addresses really are "hiding" a segwit redeemscript
... people are losing access to their BCH, there's currently no way to prevent this, and it will continue happening.
 

Examples

(These are just the ones that I've noticed, but I'm sure there are many more that go straight to the various wallet service providers' support teams instead of via Reddit.)

• https://np.reddit.com/TREZOcomments/70a48q/accidentally_sent_bch_to_a_btc_address_is_there/
• https://np.reddit.com/TREZOcomments/6zsz6t/help_i_sent_bitcoincash_to_my_bitcoin_wallet/
• https://np.reddit.com/TREZOcomments/6zlagx/noob_needs_helpby_mistake_send_bitcoin_cash_bch/
• https://np.reddit.com/TREZOcomments/6wm3re/sent_bch_to_wrong_address_help/
• https://np.reddit.com/TREZOcomments/6wuufp/i_sent_bch_to_a_btc_address_by_mistake/
• https://np.reddit.com/TREZOcomments/6wz4ft/how_to_recover_bitcoin_cash_which_are_wrongly/
• https://np.reddit.com/TREZOcomments/6y5juv/sent_bch_to_btc_wallet_by_accident_help/
• https://np.reddit.com/TREZOcomments/6y2ili/transferred_bcc_to_btc_wallet_how_to_cancel/
• https://np.reddit.com/TREZOcomments/6y0643/newbie_mistake_send_bch_to_btc_trezor_address/
• https://np.reddit.com/TREZOcomments/6xzng0/imanidiot_sent_bitcoin_cash_to_bitcoin_address/
• https://np.reddit.com/Bitcoincash/comments/6szojj/bitcoincash_accidentally_sent_to/
• https://np.reddit.com/Bitcoin/comments/6sfnl2/segwit_has_been_locked_in_congratulations_everyone/dlvkhsi/

 
To add insult to injury, the unlucky BCH owners are routinely told that there's no way to recover the coins (including by myself at the start) due to BCH not supporting segwit. And while that's currently true, it is ultimately only a half-truth.
After all, segwit opponents have often said that the satoshis in segwit addresses would be "anyone-can-spend" if the miners didn't enforce the segwit rules (i.e. ensuring that there's a proper witness/signature in the "segregated" part of the txs).
And on the BCH network the segwit rules aren't being enforced!
 

A Partial Solution

So I did some digging (e.g. in the segwit documentation and P2SH specification, BIP16) and came to the conclusion, which I'm sure that many have before me, that in order to spend money sent to a P2SH-wrapped segwit address, you only need to know the public key of the address (or more precisely: the RIPEMD160 hash of the SHA256 hash of a the public key).
Yes, a hash derived from the public key, not the private key.
Luckily, the 3-addresses don't by themselves reveal this public key hash, or anyone could've made "signed" txs from these "BCH-segwit" addresses - and someone probably already would have.
 

More Problems

So, given that it's relatively easy (for a technically inclined person, anyway) to get the public key corresponding to an address from their BIP39 mnemonic (aka wallet recovery seed), why aren't people re-claiming their BCH from these addresses?
Well, the "signature" that's needed isn't really a digital signature in the normal sense. Regular cryptocurrency transactions include a digital signature that doesn't reveal the private key that was used to make the signature in question. What's needed to "sign" for BCH-segwit addresses, however, is just literally including the public key hash that was mentioned above instead of a proper digital signature.
This means that anyone who sees such a transaction can just extract the public key hash from it - and then go on to create a conflicting transaction, using the same public key hash, that sends the same money elsewhere (to themselves, I would presume).
Technically, the second transaction would be a double-spend of the original and, as with all double-spends, it's the miners that would be the final arbiters of which transaction gets recorded in the block chain.
Additionally, a malicious miner could just create their own version of the transaction, either overtly redirecting the money to themselves, or covertly by changing the transaction to have no monetary outputs (i.e. all the money would go to the miner as "fee").
But the problems don't stop there. These segwit-spending transactions would be non-standard and as such wouldn't be relayed to the miners in the first place, nor would it be mined by miners even if it reached them (provided that the nodes and miners run with the default policy of ignoring non-standard txs, that is).
 

Suggested Solution

What we need is one or more trustworthy (yes, trust would unfortunately be required) miners to step up and make a BCH Segwit-Recovery Service for this particular purpose, in a somewhat similar way that they provided acceleration services for the BTC network (example1 and example2).
 
So... Does anyone know if a) miners are already working on this or b) know how to get in touch with them about this?
Or are there any benevolent miners here, that would like to:

• get good publicity and community goodwill by helping with these "segwit casualties"
• earn a decent fee for this service (e.g. 10 %, but this can be announced and enforced by the service itself - it only needs the public key (or its hash) to generate and mine a transaction, including a ToS-compliant fee)
• improve confidence in BCH by giving more security to the end-users

 
/btc users, feel free to notify any miner contacts you may have - let's make this happen!
 
 

Update 1 (2017-09-11)

I made a proof-of-concept frontend to "show" what I'm envisioning such a service would look like for the end users (obviously it's ugly and needs to include javascript for key/hash/address validation, etc., but it should get the intention across), here:
https://btctroubadour.github.io/bch-recovery.html

Update 2 (2017-11-21)

It looks like some greyhat/vigilante, working with an unknown miner, was able to unilaterally claim some of the BCH that were "stuck" in BTC-segwit addresses (namely, the ones for which the public keys were revealed by the owners spending BTC from the same addresses), as explained in this post and comments: https://np.reddit.com/Bitcoin/comments/7eixcu/recovering_bch_sent_to_segwit_addresses/
For those that are affected by this, it means you no longer control your BCH (they were "stolen" by the greyhat), but he seems to be offering to give them back if you agree to letting him keep 30 % for his service (or "service", however you look at it). Either way, and given the alternative (100 % loss), you should certainly check if you're affected and decide how you want to proceed. As if that wasn't enough to deal with, there seems to be a ~2 week deadline, until "December 5th, 2017 at 23:59:59 UTC", after which it seems he's decided he's entitled to keep your money. :(

Update 3 (2017-11-28)

It looks like the greyhat has turned white! He's now offering to give back, for free, any and all BCH that were transferred to him (yes, 100 %!). Read his new update post and check if you were affected by this transfer.

Update 4 (2017-12-05)

Benevolent BCH miner finally found! The good people at btc.com have announced an automated BCH-segwit-recovery service, just as I outlined in my original post. Thanks a lot to Stellaluna19 for bringing it to my attention.
Here are links to btc.com's Twitter announcement as well as the recovery service itself:
https://twitter.com/btccom_official/status/933682190424199169
https://bch.btc.com/docs/help/bch_segwit_recovery
(Note that SatoshiLabs/Trezor developer, and well-known whitehat, -johoe have suggested some improvements to secure the process outlined by btc.com. You can read his suggestions in the last paragraph of this post - or in this one.)

Edit #1:
Found an explanation for the different index number: https://coinomi.freshdesk.com/support/solutions/articles/29000009767-can-i-use-my-address-for-mining-why-did-my-address-change-
​
Main:
Hi, I'm looking to sweep funds from a gift Coinomi wallet into my current wallet. When using the recovery tool to make the sweep of DOGE, I've noticed the address that I'm looking for has a derivation path[1] of m/44'/3'/0'/0/3.
​
The Coinomi Support article for the recovery tool[2] states the following:

The list of addresses is generated in the same order as the Coinomi app. You do not need to look through thousands of addresses (unless you have used thousands of addresses in the app as well). For example, the third address that was used in the app will be the third address on this list as well.

​
However, I've restored the gift wallet from scratch, only adding DOGE, and the same behavior stilll occurs.
​
So my questions are:

1. Why was the address generated with a derivation path index of 3, instead of 0?
2. What is the benefit of doing so?

​
(BTW, the recovery tool given by Coinomi app[3] is different from the one listed in the Coinomi Support page[4])
​
[1] https://github.com/bitcoin/bips/blob/mastebip-0044.mediawiki#Path_levels
[2] https://coinomi.freshdesk.com/support/solutions/articles/29000009717-what-is-the-recovery-tool-and-how-do-i-export-my-private-keys-
[3] https://www.coinomi.com/recovery-phrase-tool.html
[4] https://iancoleman.io/bip39/

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.

1. Go to this site
   
2. Click "BIP49 derivation path" and generate. Those fifteen words are your wallet seed.
   
3. In Electrum, FileNew/RestoreStandard wallet and click "Next"
   
4. Select "I already have a seed" and click "Next"
   
5. Click "Options" box and check "BIP39" Seed then click OK
   
6. input fifteen words from Ian Coleman's site and click "Next"
   
7. On the "Derivation" screen, replace m/44'/0'/0' with m/49'/0'/0' and click "Next"
   
8. If you want wallet key encryption (STRONGLY RECOMMENDED) enter a strong password and store it somewhere safe, then click "Next"
   
9. Look at your wallet's addresses: they should all begin with "3" (if they don't, start over with a new seed).
   
10. 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."

Introduction

As always, the past 3 months since 22nd June have been crazy busy. The bears might still be around, but the show must go on and of course has not slowed the Groestlcoin development team in the slightest. Here’s a quick overview of what has already happened since the last release: - Integrated into the bitbns exchange, with the ability to buy Groestlcoin directly with the Indian Rupee. - Groestlcoin Rebrand Vote – Whilst there was much talk and push for a rebrand vote, the overall result was almost unanimously in favour of keeping our unique and conversation-starting name. With just 83 votes to Rebrand, and 2577 votes to No Rebrand. Thank you for all who voted, the funds raised are being used to fund ongoing hosting and development costs. - Integrated into the Cryptobridge exchange. Cryptobridge is a popular decentralised exchange where you always hold the private keys to your funds, only YOU have access to them. - Groestlcoin has been added to SimpleSwap – Groestlcoin can now be swapped with over 100 other cryptocurrencies, without signing up! - Groestlcoin has been added to UnoDax, one of the leading cryptocurrency exchanges in India, with TUSD, BTC and INR trading pairs. - Groestlcoin has been added to SwapLab.cc, where you can buy Groestlcoin using Bitcoin and over 50 other altcoins. Purchasing with VISA/Mastercard is coming VERY SOON. Discussed later: - Groestlcoin has been listed on #3 largest exchange in the world on volume, Huobi Global! More on this to come further on in the announcements. - Groestlcoin has been added to the Guarda Multi-Currency Wallet. - Groestlcoin has been added to Melis Multi-Device, Multi-Account, Multi-Platform, Multi-Signature advanced wallet! Already this list is far more than most other cryptocurrencies have achieved in the past 3 months. But this is just the tip of the iceberg of what has been developed.

What's been Happening?

GRSPay Released

We are so excited for this, that it has it's own separate reddit thread. Head over there now at https://www.reddit.com/groestlcoin/comments/9ikr5m/groestlcoin_releases_grspay/? to see more on this!
https://www.melis.io/assets/logo-navbar-4b6f0d372f15b2446d3fa4c68f346e4fb08ee113941186cee58fd6135f3f8b7d.svg

Melis Wallet

The the most advanced wallet for Bitcoin, Bitcoin Cash, Litecoin and now Groestlcoin.

With Melis you have the complete control of your bitcoins and private keys, you can define spending limits policies and make use of two or more factors authentication. Melis is open source, published on GitHub.

How Melis Works?

You can create as many accounts as you want. An account is a part of your wallet that can be customised to your requirements. You can choose how many co-signers are required to spend funds. The accounts are completely independent and act like separate wallets from each other but can be accessed via the same details. A core feature of Melis is the ability to set a ‘primary’ device. With this you can set an account as ‘Secure’ so it is only viewable (and accessible at all) from the Primary device. You can have a savings account hidden from the outside world whilst also having your ‘spending’ funds available on the go. With Melis you can create a multi-signature account between N people, where up to N signatures are required to sign a transaction, choosing if any of those should be mandatory.

Core Features:

• Multi-Device – Ability to hide accounts from all but the primary account.
• Multi-Account – Multiple, entirely separate accounts in one wallet.
• Multi-Platform – Available on iOS, Android, Web, Windows, Linux and Mac OS
• Multi-Signature – Create multi-signature accounts between many people, where a certain amount of people’s signatures is required to sign a transaction. Some can be required before a transaction is signed.
• Native support for many currencies – Multiple currencies are supported, accessed all from the same wallet and backup keywords.
• Advanced Coin Control (Choose which UTXO are involved in the transaction), multiple destinations and manual fee settings.
• 2FA support for enhanced security, also available via Telegram.
• Wrong-Currency detection. The server knows if someone sends BTC to a BCH address and visa versa and automatically creates a new account to be able to recover the funds.
• A single backup using standard BIP39 mnemonics is valid and enough for an unlimited number of transactions, address and different account types

https://guarda.co/assets/images/1PGo4ID.svg?1537791124643

Guarda Wallet

Safer than ever! Desktop Light Wallet - Anonymous and fast!

With Guarda Multi-currency Desktop Light Wallet you don’t need to register. Guarda has no access to your private keys or funds. You can receive, send, store, buy and exchange cryptocurrencies in complete anonymity and safety. All these features are available on Linux, Windows or MacOS. Choose the one that suits you!
More info about Guarda wallet on www.guarda.co
https://holytransaction.com/images/logo.png

Integrated into HolyTransaction

What is HolyTransaction?

HolyTransaction gives users access to the crypto world with a universal cryptocurrency wallet and instant exchange.

Features

• Cryptocurrency Exchange HolyTransaction features a cryptocurrency exchange where you can exchange between all popular currencies with just a few clicks. Instant send from one currency to another.
• Simple to use - With a simple, no-handdles GUI, anyone can now use and have access to cryptocurrency.
• Cutting-Edge security - Following industry-best standards, and guarentee that your money is safe. Utilising hot and cold storage wallets.
• Features an API whereby you can integrate cryptocurrency support into any website, from invoice processing to white-labelled multi-currency wallets.

For more information, visit Holy Transaction here.
https://www.groestlcoin.org/wp-content/uploads/2018/09/next-grs-groestlcoin.jpg

Integrated into NEXT Wallet

What is NEXT?

NEXT is a modern, next-generation stylish open-source Desktop wallet.

Features

• Cross-Platform, NEXT runs on Windows, Linux and MacOS
• Fast and Lightweight - NEXT is an extremely fast and light wallet
• Modern User Interface - The interface is elegant and simple to use, perfect for new to cryptocurrency and veterans alike.
• In-Wallet Proposal Tab - Proposal tab will allow users to view all proposals and/or easily create a proposal.

For more information, visit NextWallet here.
https://blockchainfinancial.com/mediaserve2018/09/admin-06143647-bcf_logo_vec_256x256.png

Integrated into Blockchain Financial

What is Blockchain Financial?

Blockchain Financial is a set of web based services for individuals and companies that want to make things happen with the Cryptocurrencies Ecosystem. - For those that don't know anything about cryptocurrencies, we offer tools that will let them receive, send and operate with an assortment of coins. - For those that are already riding the wave, we offer tools that will let them do all those things that they weren't able to do.

Blockchain Financials mission

We're not here to reinvent the wheel. We're here to make it run smoother for you, and we provide some of the most useful services you'll find on the internet, made in a way that is easy to understand and use on a daily basis. In short, we're a bunch of people that claim to be Crypto Evangelists. We strongly believe in cryptocurrencies, and our main promise is to push them up so more people get involved and take all the advantages they offer.

More information from Blockchain Financial

Back in 2014, the world was taken by storm when Facebook approved the first cryptocurrencies tipping apps. The first was for Dogecoin, and the second was for multiple coins.
The project was hosted on whitepuma.net, and persisted for almost two years, built up a massive user community and gave a home to Bitcoin, Litecoin, Dogecoin and dozens of other bitcoin-based altcoins.
After very active months, the tipping hype started to fade away. Then, the developers decided to jump into the next stage: bringing not only tipping, but also mining and a widget that could be embedded on websites to allow everyone to accept payments. Sadly, the work was never completed because the project started to require an unsustainable amount of resources. Then, in a painful decision, a shutdown was announced by December 2015.
A couple of months after whitepuma.net was closed, the source code was released by its creator as Open Source on GitHub. But it wasn't maintained.
Now, some of the original members of the dev and admin teams gathered up with a handful of the WhitePuma's elite users, and decided to make something good with the best pieces of the old source code. That, with fresh new ideas and the power of the BardCanvas engine, synthesized the core of Blockchain Financial.

More info about Blockchain Financial wallet on .
For more information, visit [Blockchain Financial](www.blockchainfinancial.com)
https://www.huobi.com/image/logo.aeb4723.svg

Groestlcoin Listed on Huobi

Who are Huobi?

Huobi was founded in China and is now based in Singapore, with offices in Hong Kong, South Korea, Japan and the North America, currently sitting #3 in volume on Coinmarketcap. Huobi is a great leap forward for our growing presence in Asia and we are very excited to be listed here!
You can find the official Huobi announcement here.

Groestlcoin Core v2.16.3 - Please Update ASAP

A new major Groestlcoin Core version 2.16.3 is now available for download which includes both a Denial of Service component and a critical inflation vulnerability, so it is recommended to upgrade to it if you are running a full Groestlcoin node or a local Groestlcoin Core wallet.
v2.16.3 is now the official release version of Groestlcoin Core. This is a new major version release with a very important security updates. It is recommended to upgrade to this version as soon as possible. Please stop running versions of Groestlcoin Core affected by CVE-2018-17144 ASAP: These are 2.13.3 and 2.16.0.
As a result in this, all exchanges and services have been asked to upgrade to this version, so please be patient if wallets go in to maintenance mode on these services.

What's new in version v2.16.3?

This is a major release of Groestlcoin Core fixing a Denial of Service component and a critical inflation vulnerability (https://nvd.nist.gov/vuln/detail/CVE-2018-17144) exploitable by miners that has been discovered in Groestlcoin Core version 2.13.3 and 2.16.0. It is recommended to upgrade to 2.16.3 as soon as possible. If you only occasionally run Groestlcoin Core, then it's not necessary to run out and upgrade it right this second. However, you should upgrade it before you next run it. If you know anyone who is running an older version, tell them to upgrade it ASAP. Stored funds are not at risk, and never were at risk. At this time we believe over half of the Groestlcoin hashrate has upgraded to patched nodes. We are unaware of any attempts to exploit this vulnerability. However, it still remains critical that affected users upgrade and apply the latest patches to ensure no possibility of large reorganizations, mining of invalid blocks, or acceptance of invalid transactions occurs.

The Technicals

In Groestlcoin Core 2.13.3, an optimization was added (Bitcoin Core PR #9049) which avoided a costly check during initial pre-relay block validation that multiple inputs within a single transaction did not spend the same input twice which was added in 2012 (Bitcoin Core PR #443). While the UTXO-updating logic has sufficient knowledge to check that such a condition is not violated in 2.13.3 it only did so in a sanity check assertion and not with full error handling (it did, however, fully handle this case twice in prior to 2.1.0.6). Thus, in Groestlcoin Core 2.13.3, any attempts to double-spend a transaction output within a single transaction inside of a block will result in an assertion failure and a crash, as was originally reported. In Groestlcoin Core 2.16.0, as a part of a larger redesign to simplify unspent transaction output tracking and correct a resource exhaustion attack the assertion was changed subtly. Instead of asserting that the output being marked spent was previously unspent, it only asserts that it exists. Thus, in Groestlcoin Core 2.16.0, any attempts to double-spend a transaction output within a single transaction inside of a block where the output being spent was created in the same block, the same assertion failure will occur. However, if the output being double-spent was created in a previous block, an entry will still remain in the CCoin map with the DIRTY flag set and having been marked as spent, resulting in no such assertion. This could allow a miner to inflate the supply of Groestlcoin as they would be then able to claim the value being spent twice.
Groestlcoin would like to publicly thank Reddit user u/Awemany for finding CVE-2018-17144 and reporting it (https://lists.linuxfoundation.org/pipermail/bitcoin-core-dev/2018-Septembe000064.html). You deserve gratitude and appreciation from cryptoworld, and you have ours. If you want to support him for his work, please consider donating to him on his bitcoin cash address: bitcoincash:qr5yuq3q40u7mxwqz6xvamkfj8tg45wyus7fhqzug5
http://i.imgur.com/3YhyNZK.png

Groestlcoin Electrum-GRS 3.2.2 - Ledger & Trezor Edition

What is Electrum-GRS?

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.

Changes:

• Qt GUI: seed word auto-complete during restore
• performance improvements (wallet, and Qt GUI)
• hardware wallets: show debug message during device scan
• add regtest support (via --regtest flag)
• other minor bugfixes and usability improvements
• If present, libsecp256k1 is used to speed up elliptic curve operations. The library is bundled in the Windows, MacOS, and Android binaries. On Linux, it needs to be installed separately.
• Transactions that are dropped from the mempool are kept in the wallet as 'local', and can be rebroadcast. Previously these transactions were deleted from the wallet.
• The scriptSig and witness part of transaction inputs are no longer parsed, unless actually needed. The wallet will no longer display 'from' addresses corresponding to transaction inputs, except for its own inputs.
• The partial transaction format has been incompatibly changed. This was needed as for partial transactions the scriptSig/witness has to be parsed, but for signed transactions we did not want to do the parsing. Users should make sure that all instances of Electrum-GRS they use to co-sign or offline sign, are updated together.
• Signing of partial transactions created with online imported addresses wallets now supports significantly more setups. Previously only online p2pkh address + offline WIF was supported. Now the following setups are all supported: > online {p2pkh, p2wpkh-p2sh, p2wpkh} address + offline WIF, > online {p2pkh, p2wpkh-p2sh, p2wpkh} address + offline seed/xprv, > online {p2sh, p2wsh-p2sh, p2wsh}-multisig address + offline seeds/xprvs > (Potentially distributed among several different machines) Note that for the online address + offline HD secret case, you need the offline wallet to recognize the address (i.e. within gap limit). Having an xpub on the online machine is still the recommended setup, as this allows the online machine to generate new addresses on demand.
• Segwit multisig for bip39 and hardware wallets is now enabled (both p2wsh-p2sh and native p2wsh).
• Ledger: offline signing for segwit inputs (#3302) This has already worked for Trezor. Offline segwit signing can be combined with online imported addresses wallets.
• Added Revealer plugin. ( https://revealer.cc ) Revealer is a seed phrase back-up solution. It allows you to create a cold, analog, multi-factor backup of your wallet seeds, or of any arbitrary secret. The Revealer utilizes a transparent plastic visual one time pad.
• Fractional fee rates: the Qt GUI now displays fee rates with 0.1 gro/byte precision, and also allows this same resolution in the Send tab.
• Hardware wallets: a "show address" button is now displayed in the Receive tab of the Qt GUI. (#4316)
• Trezor One: implemented advanced/matrix recovery (#4329)
• Windows: use dnspython to resolve dns instead of socket.getaddrinfo (#4422)
• Importing minikeys: use uncompressed pubkey instead of compressed (#4384)
• SPV proofs: check inner nodes not to be valid transactions (#4436)
• Qt GUI: there is now an optional "dark" theme (#4461)
• Several other minor bugfixes and usability improvements.
• Fix DNS resolution on Windows
• Fix websocket bug in daemon

http://i.imgur.com/3YhyNZK.png

Electrum-GRS Mobile Android

What is Electrum-GRS Mobile?

Electrum-grs is a lightweight "thin client" groestlcoin wallet Android 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.

Changes

• Android: fix some crashes
• If present, libsecp256k1 is used to speed up elliptic curve operations. The library is bundled in the Windows, MacOS, and Android binaries. On Linux, it needs to be installed separately.
• Two-factor authentication is available on Android. Note that this will only provide additional security if one time passwords are generated on a separate device.
• Semi-automated crash reporting is implemented for Android.
• Qt/Kivy: added "gro" as optional base unit.
• Kivy GUI: significant performance improvements when displaying history and address list of large wallets; and transaction dialog of large transactions.

Groestlcoin EasyVanity Released

Groestlcoin EasyVanity is a Windows app is built from the ground-up in C# and makes it easier than ever before to create your very own bespoke Groestlcoin address(es), even whilst not connected to the internet! You can even generate multiple keys with the same prefix and leave it on overnight whilst your CPU or GPU collects and stores these addresses locally.

If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then Groestlcoin EasyVanity is the right choice for you to create a more personalized address.

Features

• Ability to continue finding keys after first one is found • Includes warning on startup if connected to the internet • Ability to output keys to a text file (And shows button to open that directory) • Ability to make your match case sensitive (Where possible) • Show and hide the private key with a simple toggle switch, and copy the private key straight to your clipboard • Show full output of commands • Includes statistics whilst the application is running • Ability to choose between Processor (CPU) and Graphics Card (GPU) • Automatically detects 32 or 64 bit systems • Features both a Light and Dark Material Design inspired Themes • EasyVanity's search is probabilistic, and the amount of time required to find a given pattern depends on how complex the pattern is, the speed of your computer, and whether you get lucky. • EasyVanity includes components to perform address searching on your CPU (vanitygen) and your OpenCL-compatible GPU (oclvanitygen). Both can be built from source, and both are included in the Windows binary package. • Prefixes are exact strings that must appear at the beginning of the address. When searching for prefixes, Easyvanity will ensure that the prefix is possible, and will provide a difficulty estimate. • The percentage displayed just shows how probable it is that a match would be found in the session so far. If it finds your address with 5% on the display, you are extremely lucky. If it finds your address with 92% on the display, you are unlucky. If you stop EasyVanity with 90% on the display, restart it, and it finds your address with 2% on the display, your first session was unlucky, but your second session was lucky. • EasyVanity uses the OpenSSL random number generator. This is the same RNG used by groestlcoin and a good number of HTTPS servers. It is regarded as well-scrutinized. Guessing the private key of an address found by EasyVanity will be no easier than guessing a private key created by groestlcoin itself. • To speed up address generation, EasyVanity uses the RNG to choose a private key, and literally increments the private key in a loop searching for a match. As long as the starting point is not disclosed, if a match is found, the private key will not be any easier to guess than if every private key tested were taken from the RNG. EasyVanity will also reload the private key from the RNG after 10,000,000 unsuccessful searches (100M for oclvanitygen), or when a match is found and multiple patterns are being searched for. • Free software - MIT. Anyone can audit the code. • Written in C# - The code is short, and easy to review.

Groestlcoin Sentinel (Android & Blackberry) – Mainnet + Testnet

What is Sentinel?

Groestlcoin Sentinel is the easiest and fastest way to track/receive/watch payments in your offline Groestlcoin Wallets. Groestlcoin Sentinel is compatible with any standard Groestlcoin address, BIP44 XPUB (Extended Public Key) BIP49 YPUB and BIP84 ZPUB
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 particular wallet.

What's New?

• Track Segwit BIP84 ZPUBs extended pubkeys
• Sweep Segwit BIP49 (P2SH-P2WPHK) and Segwit BIP84 (bech32) amounts into selected account/address
• Broadcast hex tx
• Added option to chose from Binance and Upbit as selected Exchange
• Added Korean Won as price option
• Receive address closes upon receipt of groestlcoin
• Fix EUR price  ### Groestlcoin P2SH Paper Wallet #### What is Groestlcoin P2SH Paper Wallet? Groestlcoin P2SH paperwallet is a simple groestlcoin paper wallet generator that utilizes Segregated Witness (SegWit) Pay To Witness Public Key Hash (P2WPKH) addresses and transactions.

The P2SH paperwallet supports creating P2SH paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.

Changes

• Details section to validate private keys and to view corresponding segwit address, public key and redeem script.
• Segwit brain wallet
• Removed Vanity generator as it was very slow. (Please use VanityGen command line or EasyVanity instead)
• Rebranded segwit paperwallet to p2sh paperwallet
• Favicon updated
• Testnet support added
• Groestlcoin Sentinel can sweep funds from private keys and QR codes generated with this tool
• Groestlcoin Sentinel Testnet can sweep funds from private keys and QR codes generated with this tool
• Electrum-GRS can import private keys using the console and the importprivkey() command. Import as P2SH segwit: importprivkey('p2wpkh-p2sh:KzTLBvC6mNudLBjEmwYCuk3jrZ7sZS8CzFDzcrwnDM2CVpH8vNAn')
• Electrum-GRS Testnet can import private keys using the console and the importprivkey() command. Import as P2SH segwit: importprivkey('p2wpkh-p2sh:cNNDi1AT8XNng2wJ5HNFN41toufU9XZ2bW8MGi7c9SGw4hnMuASk')

Features

• Keypair generation with QR Codes
• Bulk address generator
• Key Sweeping Tool to move all funds belonging to a single SegWit private key.  ### Groestlcoin BECH32 Paper Wallet Released #### What is Groestlcoin BECH32 Paper Wallet? Groestlcoin BECH32 paperwallet is a simple groestlcoin paper wallet generator that utilizes Segregated Witness (SegWit) Pay To Witness Public Key Hash (P2WPKH) addresses and transactions.

The BECH32 paperwallet supports creating BECH32 paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.

Features

• Detail section to validate private keys and to view corresponding segwit address, public key and redeem script.
• Segwit brain wallet
• Testnet support
• Groestlcoin Sentinel can sweep funds from private keys and QR codes generated with this tool
• Groestlcoin Sentinel Testnet can sweep funds from private keys and QR codes generated with this tool
• Electrum-GRS can import private keys using the console and the importprivkey() command. Import as P2SH segwit: importprivkey('p2wpkh-p2sh:KzTLBvC6mNudLBjEmwYCuk3jrZ7sZS8CzFDzcrwnDM2CVpH8vNAn')
• Electrum-GRS Testnet can import private keys using the console and the importprivkey() command. Import as P2SH segwit: importprivkey('p2wpkh-p2sh:cNNDi1AT8XNng2wJ5HNFN41toufU9XZ2bW8MGi7c9SGw4hnMuASk')
• Bulk address generator
• Key Sweeping Tool to move all funds belonging to a single SegWit private key.


Groestlcoin Web Wallet Update 1.4

What is Groestlcoin Web Wallet?

Groestlcoin Webwallet is an open source, multisignature, HD Wallet and more! Webwallet is a a open source browser based Groestlcoin webwallet.
Webwallet is a playground for Groestlcoin in javascript to experiment with. It supports multisig, OP_HODL, RBF and many more. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.

Changes:

• RBF (Replace-By-Fee) enabled by default
• Bech32 address support added
• Testnet support added

https://preview.redd.it/hf270gko90211.jpg?width=4032&format=pjpg&auto=webp&s=5a12a2b6464eac8ac827983961d40451e292a6fb
Preface: This is a TEST wallet! There are no bitcoins stored here, no will there ever be! (or if there are, they weren't mine!)
TLDR: Scrambled the order of the 24 words using a password, stamped onto 22 GA weldable steel plate. What could go wrong? I feel like I'm overlooking something fairly simple that makes this insecure.
So, I recently got a Ledger Nano S, and have had plenty of time to explore it, generate several wallets (including adding a 25th word for extra security), add them as watch-only addresses into Electrum, or use the Nano S with Electrum to send/receive funds. I feel pretty confident I know what I'm doing, but wanted your opinions on how I should handle long-term key storage. The idea thats been floating around my head for a while has been to stamp it out in metal (I know a few companies offer "build-it-yourself" setups, but I wanted something a bit cheaper). This is the result of my experiment.
"But wait!" I hear you say, "you've just posted your private keys onto the internet! Oh noes! You fool!" Except that I'm sure this sequence of words will be plugged into a handful of wallets to see whats up, only to find out that it doesn't work. Thats because the order of the words is encoded (and no, the upside down A in WASTE is not a clue - that was completely unintentional).
The idea I have is that even listing out all 24 words, assuming they're in some unknown order, that creates a 24! number of possible combinations, which is 6.2e23 possible combinations. For perspective, there are 1.5e48 possible public keys, 7.9e28 private keys, and 9.2e18 grains of sand on the Earth. Needless to say, the random order seems secure enough, provided one can unrandomize the order. To do this, I've selected a fairly simple shift cipher, using a word hopefully only known to the end user - which is the weakest part of the system. However, since this is meant as a fairly secure long-term storage mechanism for people completely computer illiterate, I can't really do much bettecomplex. My hope is that if someone else finds this, they'll try forwards, backwards, every other, every 3rd, diagonal, etc, but never figure out the exact combo. After trying to bruteforce it for a couple days, they'll give up and toss it in the trash.
The cipher works by first writing down the code on a piece of paper (offline to make sure its safer). You then count out the alphabet until you get to the first word of the unscrambled wallet. In this case, my encoding word is TEST (any word is acceptable provided its fairly long - longer the better - up to 23 characters). What you do is starting with where you wrote AMATEUR, you count A, then LATER becomes B. You repeat this until you get to the letter T in TEST, which happens to be ARCTIC. This becomes the first word of the unscrambled wallet, and you cross it off (skipping over it for the remainder of the code). After you find ARCTIC, you start counting again with REPORT being A, RADAR being B, and so on, looping around until you get to the 2nd letter in the password E. This means the 2nd word of the unscrambled wallet is AMATEUR. You repeat this, looping through the list of words and password as many times as necessary. (There's got to be a word for this type of cipher, but I don't have a clue what it's called.)
All of this is stamped onto 22 GA weldable sheet metal, to be stored in a safe or somewhere dry. The idea was to create a fairly survivable long-term storage option where one of my family members could forget about this completely, find it 10 years down the road and have it still be in perfectly readable condition. Since I'm using the BIP39 implemented in the Ledger, finding a word list should be fairly straight forward in the event the metal gets bent/ripped across a word or two. The idea would be that once the user wishes to redeem their coins, this wallet would be completely abandoned for something else secure, so its a 1-time use setup.
Since I know nothing of metalworking, and I'm not the greatest at crypto, I felt like sharing the idea to inspire others, or to get advice on what I may be missing. It seems fairly straightforward, but I feel like there could be some fatal flaw that I'm completely overlooking with this. My biggest concern would be that the individual has to memorize some scramble password (which they'll have to share with me, but thats the nature of the beast and not relevant at this time), which means it could be bruteforced out, or simply forgotten. But I'd prefer a simply forgotten password than to create this "ultra secure wallet" that the first person who accidentally gets hold of it can steal everything from.

I have a ledge nano s, that I've been using for some time. Over the weekend I wanted to transfer some BTC over to it when I noticed on the app that there was an update to 1.3.1. Before updating I saved my current balance and operations history on a text file. I then reset my nano and updated it after the update I added the bitcoin app and logged in to find a 0.00 balance? Not sure if to panic or not since my coins should be safe they were there prior to the update and I did not send them anywhere.
I researched online and it seems to be happening to others. I followed the advice giving by many including resetting application data, clearing cookies and deleting and reinstalling the apps and chrome, ledger's own seen here https://ledger.zendesk.com/hc/en-us/articles/115005165349-After-the-Nano-S-update-I-can-t-find-my-coins but nothing works and my account is still at 0.00. I even went to a computer that did not have chrome and installed it on there along with the apps and nothing. The only thing I have not tried is connecting my account to a 3rd party site like Mycelium to avoid any further problems.
UPDATE: Want to thank everyone for the help. KulderZipke0 - I followed your advice and was able to recover my BTC and send it to another wallet. I've had the correct 24 words all along but for who knows what reason my nano s was not showing the money. Only after learning more on how to use this https://www.ledgerwallet.com/support/bip39-standalone.html was I able to recover my private key using the 24 words. I do not plan on using my nano anymore since it seems to be dysfunctional. If you guys have other suggestions for ways/places to store my coins let me know. Thanks Again!!!
For those of you that are having the same issue. Here is what I did. If you have your keys with you all you need to do is download this page from ledger to your desktop. https://www.ledgerwallet.com/support/bip39-standalone.html, once you do that take your computer offline. Copy your 24 words into the BIP39 Mnemonic field box, if your words are wrong it will say invalid up at the top. If they are correct you should get a QR code on the top right and a list of addresses under "Derived Addresses" look for the address you sent your coins to. Mine was the very 1st one but the list can get very long. Once you find your address copy the private key which will be the 3rd column of codes. Take that key to another wallet and recover your coins. Hope this helps.

I spent two days to figure this out but I think I know how to solve this, just currently stuck and need your help! I had btc stored on a nano s segwit wallet before the fork.
Bitcoin diamond was forked from bitcoin on block #495866 (nov 24 2017) and launched the mainnet Jan 5 2018 (I think). There is currently very little information about this project and very little support on exchanges, wallets and mining. http://btcd.io
The only light wallet currently have a splitting tool is Bither for Android but they do not support Segwit. If you had your btc in a segwit wallet before the fork you can't use this method.
Otherwise follow this: https://steemit.com/bitcoin/@tiberiu/how-i-claimed-sbtc-super-bitcoin-from-my-paper-wallet Or this: https://www.reddit.com/BitcoinMarkets/comments/7oekie/guide_how_to_redeem_and_sell_all_bitcoin_fork/
You get 10 bcd for every btc and current price is 0.001 btc. That means you get $160/ forked btc which is 1% free money. Is it worth it? For me it is. You can use same method for both SBTC and BCD. Other methods can be used for BTX, BCX and BFX but have to wait for me. Need segwit support in Coinomi and/or Bither.
In my BCD case it was a bit more complicated but hopefully possible.

1. Move btc from ledger nano to somewhere save
2. Download the BIP39 converter (standalone version). Unplug your internet and run the html: https://github.com/iancoleman/bip39
3. Enter your ledger 24 word mnemonic. Select BIP49 derivation path. Find your btc address that contained btc right before block 495866, copy private key. Use a block explorer: https://blockchain.info
4. Find the tx ID that sent those btc and verify in bcd explorer if you have any bcd before you continue (click on the actual address will not work for some reason, shows empty). My tx had 3000 confirmations. http://explorer.btcd.io
5. Now the complicated part =) You have to build bitcoin diamond core app from source because it doesn't exist yet: https://github.com/eveybcd/BitcoinDiamond
6. I built it for windows x64 using this guide (by cloning bitcoin diamond from github instead of bitcoin when you come to that step). Took 1h.: https://github.com/bitcoin/bitcoin/blob/mastedoc/build-windows.md
7. Actually quite cool you can run Ubuntu on Windows 10! You can build for 32 bit as well but not when you have installed dependencies for x64. The last step will copy the binaries to your windows folder: "make install DESTDIR=/mnt/c/workspace/bitcoindiamond"
8. Run bitcoindiamond-qt in windows and let it sync with network. Took me 12h with fiber connection.
9. Go to help and open console. If your wallet is encrypted, decrypt for 10min using: "walletpassphrase your-wallet-passphrase 600".
10. Import old btc address as watch-only to check bcd balance. True means it will rescan the blockchain. Rescan took 1h with a decent PC (no SSD):
11. If you see your BCD balance, now Import your btc private key into the watch-only address. No need to rescan again, thus "false".:

Ok here is where I'm stuck. I can see my balance but it's not spendable. I also tried to import private key directly (with sync) with empty core wallet but balance is still zero. It does not pick up the transaction! Anyone know how to solve this?
Rest of the guide when this is solved:

• You should now be able to access your bcd!
• Go to gate.io (register). Deposit bcd to exchange from bitcoindiamond-qt. Try small amount first, use a proper fee.
• Do whatever you like! Sell or keep.

'''
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]¹
A recap of Bitcoin in April 2018

• 01: [People unsurprisingly spend the day making April fools jokes about Bitcoin]²
• 02: [A list of all words used to generate 24-word bitcoin seeds with 10⁷² combinations]³
• 03: [The 0.4.1 beta version of Lightning Network implementation Lnd is released]⁴
• 04: [Mark Karpeles, ex-CEO of Mt. Gox does an AMA]⁵ & [Eclair’s Lightning Network wallet is released for mainnet on Android]⁶
• 05: [Satoshi Nakamoto chose this date as his birthday as a reference to gold confiscation from US citizens]⁷
• 06: [Electrum is adding support for the Lightning Network]⁸ & [Nick Szabo on some of the basic concepts of a blockchain 14 years before bitcoin’s release]⁹ & [The SEC allows Bitcoin ETF proposals again]¹⁰ & [Elizabeth Stark, CEO of Lightning Labs on Yahoo Finance]¹¹
• 07: [People argue over an infographic on technology adoption]¹²
• 08: [Twitter suspends the @Bitcoin account after it kept tweeting against Bitcoin]¹³
• 09: [People discuss the value of Technical Analysis for cryptocurrency markets]¹⁴ & [Someone gets a 1 satoshi tip using the Lightning Network]¹⁵
• 10: [People discuss whether Bitcoin is nuanced enough]¹⁶ & [Canadian banks ban cryptocurrency purchases resulting in skyrocketing volumes on P2P exchanges]¹⁷
• 11: [BitMEX research on Proof-of-Stake viability]¹⁸ & [HalongMining is a 10nm ASIC fabricated by Samsung semiconductors]¹⁹
• 12: [The biggest 1hr volume in the history of Bitcoin happens as the price rises $1000 in an hour]²⁰
• 13: [Developers at Chain make Bulletproofs twice as fast]²¹ & [A community member shares content, tools and advice on cryptocurrency and taxes]²² & [Yahoo Japan buys a 40% stake in cryptocurrency exchange BitARG]²³
• 14: [Bitcoin is declared legal under Islamic law]²⁴
• 15: [Bitcoin reaches 800k subscribers]²⁵
• 16: [A 2-minute reminder of how the banking system works]²⁶ & [Coinbase buys Earn.com]²⁷
• 17: [IMF Director Lagarde makes positive comments about cryptocurrencies]²⁸ & [Someone is looking to make a Lightning and NFC integration for in-store payments]²⁹
• 18: [Analysis on the age distribution of unspent transaction outputs throughout time]³⁰
• 19: [A reminder that Amazon filed a patent in 2014 to de-anonymize bitcoin transactions and sell the data to law enforcement]³¹
• 20: [Benedikt Bunz and Pieter Wuille on Bulletproofs]³² & [Bitwage integrates SegWit]³³
• 21: [The Eclair Lightning Network wallet is improving]³⁴ & [A deep dive into Lit: A Lightning Network implementation]³⁵
• 22: [The high court in India is discussing the Bitcoin ban with the Central Bank of India]³⁶
• 23: [The Lightning Network reaches 2000 nodes, $150K capacity and 7000 active channels]³⁷ & [Ken Sheriff is repurposing vitage computers to mine bitcoins]³⁸ & [You can buy Reddit Gold with bitcoin again]³⁹
• 24: [Exploring the Lightning Network Daemon 0.4 Beta release]⁴⁰
• 25: [The Nasdaq CEO says they are open to becoming a cryptocurrency exchange]⁴¹ & [Misleading references get removed from the Bitcoin Wikipedia article]⁴²
• 26: [The 17 millionth Bitcoin has been mined]⁴³ & [A guide to using BTCPay, a free and open-source Bitcoin payment processor]⁴⁴
• 27: [Hundreds of Bitcoin users seek lawsuit against Bitcoin.com for misleading visitors]⁴⁵
• 28: [Bitcoin was the 9th most read article on Wikipedia in 2017]⁴⁶ & [France reduces the tax rate on cryptocurrency sales from 45% to 19%]⁴⁷
• 29: [The government of the Philippines will allow ten cryptocurrency companies to operate in a special economic zone in Cagayan]⁴⁸
• 30: [Eltoo: a simplified update mechanism for Lightning and off-chain contracts]⁴⁹ & [A beginner’s guide to Lightning on a Raspberry Pi]⁵⁰

'''
Bitcoin recap - April 2018
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Author: SamWouters
1: bit*o*nsni**ets*com 2: https://www.reddit.com/Bitcoin/comments/88mxv4/april_fools_the_dip_was_just_one_big_joke_the/ 3: https://www.reddit.com/Bitcoin/comments/88ygka/created_bip39_wordlist_on_one_sheet_of_paper_have/ 4: https://www.reddit.com/Bitcoin/comments/899zsm/lnd_41_released/ 5: https://www.reddit.com/Bitcoin/comments/89o16y/im_mark_karpel%C3%A8s_exceo_of_bankrupt_mtgox_ask_me/ 6: https://www.reddit.com/Bitcoin/comments/89rrw4/eclair_wallet_released_for_main_net/ 7: https://www.reddit.com/Bitcoin/comments/89xoji/satoshi_chose_todays_date_as_his_birthday_on_this/ 8: https://www.reddit.com/Bitcoin/comments/8a9fop/meanwhile_electrum_is_silently_working_on_adding/ 9: https://www.reddit.com/Bitcoin/comments/8aaenc/nick_szabo_defined_the_basic_concepts_of/ 10: https://www.reddit.com/Bitcoin/comments/8a5aez/sec_quietly_puts_bitcoin_etf_proposals_back_on/ 11: https://www.reddit.com/Bitcoin/comments/8abc7d/elizabeth_stark_ceo_of_lightning_labs_on_yahoo/ 12: https://www.reddit.com/Bitcoin/comments/8afz22/bitcoin/ 13: https://www.reddit.com/Bitcoin/comments/8aojsg/twitter_finally_suspended_the_compromised_bitcoin/ 14: https://www.reddit.com/Bitcoin/comments/8b7avc/canadian_banks_ban_cryptocurrency_buys_canadians/ 15: https://www.reddit.com/Bitcoin/comments/8axhii/someone_just_tipped_me_000000000001_btc_using_ln/ 16: https://www.reddit.com/Bitcoin/comments/8b6884/is_this_community_too_pro_bitcoin/ 17: https://www.reddit.com/Bitcoin/comments/8b7avc/canadian_banks_ban_cryptocurrency_buys_canadians/ 18: https://www.reddit.com/Bitcoin/comments/8bfbte/bitmex_research_complete_guide_to_proof_of_stake/ 19: https://www.reddit.com/Bitcoin/comments/8bgjbv/interesting_detail_worlds_most_efficient_bitcoin/ 20: https://www.reddit.com/Bitcoin/comments/8bqb8d/we_just_witnessed_the_biggest_1hr_volume_in_the/ 21: https://www.reddit.com/Bitcoin/comments/8c21mo/we_made_bulletproofs_twice_as_fast_with_rust_and/ 22: https://www.reddit.com/Bitcoin/comments/8bz8fs/update_hi_rbitcoin_i_quit_my_job_to_start/ 23: https://www.reddit.com/Bitcoin/comments/8bz8hj/yahoo_japan_is_buying_40_stake_in_cryptocurrency/ 24: https://www.reddit.com/Bitcoin/comments/8c4gux/bitcoin_market_opens_to_16_billion_muslims_as/ 25: https://www.reddit.com/Bitcoin/comments/8cd0yv/rbitcoin_just_reached_800000_subscribers/ 26: https://www.reddit.com/Bitcoin/comments/8cnul8/why_the_whole_banking_system_is_a_scam/ 27: https://www.reddit.com/Bitcoin/comments/8coq3w/breaking_coinbase_just_bought_one_of_bitcoins/ 28: https://www.reddit.com/Bitcoin/comments/8cvzny/imf_director_lagarde_bitcoin_could_make_global/ 29: https://www.reddit.com/Bitcoin/comments/8cuj28/lightning_nfc_the_new_plan_to_bring_bitcoin_to/ 30: https://www.reddit.com/Bitcoin/comments/8d0ra0/ladies_and_gentlemen_i_present_to_you_the/ 31: https://www.reddit.com/Bitcoin/comments/8dc65s/amazon_filed_a_patent_to_deanonymize_bitcoin/ 32: https://www.reddit.com/Bitcoin/comments/8dr4fw/benedikt_b%C3%BCnz_bulletproofs/ 33: https://www.reddit.com/Bitcoin/comments/8dnugw/bitwage_integrates_segwit_looks_forward_to_the/ 34: https://www.reddit.com/Bitcoin/comments/8dxj7z/ln_is_getting_stable_eclair_works_much_bette 35: https://www.reddit.com/Bitcoin/comments/8dub5c/video_a_deep_dive_into_lit_a_lightning_network/ 36: https://www.reddit.com/Bitcoin/comments/8e4qzz/indian_high_court_set_to_overrule_central_bank_of/ 37: https://www.reddit.com/Bitcoin/comments/8ebjjm/bitcoin_lightning_network_matures_with_record/ 38: https://www.reddit.com/Bitcoin/comments/8ebso1/til_ken_sheriff_has_not_only_shown_how_to_mine/ 39: https://www.reddit.com/Bitcoin/comments/8ecrvs/you_can_buy_reddit_gold_with_bitcoin_again/ 40: https://www.reddit.com/Bitcoin/comments/8dxnc4/exploring_the_lightning_network_daemon_lnd_04/ 41: https://www.reddit.com/Bitcoin/comments/8etnqu/nasdaq_is_open_to_becoming_cryptocurrency/ 42: https://www.reddit.com/Bitcoin/comments/8erolf/wikipedias_bitcoin_page_removed_the_bitcoin_dot/ 43: https://www.reddit.com/Bitcoin/comments/8f1u7h/17000000_bitcoins_have_been_mined_4_millions_to/ 44: https://www.reddit.com/Bitcoin/comments/8f1eqf/the_ultimate_guide_to_btcpay_the_free_and/ 45: https://www.reddit.com/Bitcoin/comments/8fc4ec/600_bitcoin_users_seek_lawsuit_against_bitcoincom/ 46: https://www.reddit.com/Bitcoin/comments/8fk49h/bitcoin_was_the_9th_most_read_article_on/ 47: https://www.reddit.com/Bitcoin/comments/8fixff/france_slashes_tax_rate_on_cryptocurrency_sales/ 48: https://www.reddit.com/Bitcoin/comments/8fqe5w/the_government_of_the_philippines_has_announced/ 49: https://www.reddit.com/Bitcoin/comments/8g17vs/eltoo_a_simplified_update_mechanism_for_lightning/ 50: https://www.reddit.com/Bitcoin/comments/8fzhim/beginners_guide_to_lightning_on_a_raspberry_pi/
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