Groestlcoin 22nd March Release – 6 Year Anniversary

Posted on by Jackielove4u

Groestlcoin Release March 2020

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.

What’s Being Released Today?

 

GROESTLCOIN DEVELOPMENT RELEASE

Groestlcoin Core 2.18.2

What am I?

Groestlcoin Core is a major release 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 is now distributed alongside Groestlcoin Core's other executables.

Changelog

  • 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/master/doc/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 (https://github.com/groestlcoin/groestlcoin/blob/master/doc/psbt.md) interface, which is used to allow multiple programs to collaboratively work to create, sign, and broadcast new transactions. This is usefulfor offline (cold storage) wallets, multisig wallets, coinjoin implementations, and many other cases where two or more programs needto interact to generate a complete transaction.
  • The output script descriptor (https://github.com/groestlcoin/groestlcoin/blob/master/doc/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` toprevent Groestlcoin-Qt from being built with support for the BIP70 paymentprotocol 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 theirexposure 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 maybe 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. At the moment, it returns an array of the currently active commands and how longthey'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 of the PSBTs. Any signatures provided in any of the PSBTs will be dropped.
  • `analyzepsbt` examines a PSBT and provides information about whatthe 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 pubkeysstill 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 estimatedvirtual 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 tothe 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`, nowreturn 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 ofthe same inputs.
  • `settxfee` previously silently ignored attempts to set the fee belowthe 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 whetherthe 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 eachrequest 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 in order 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 orpublic 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 blankwallet 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](https://github.com/groestlcoin/groestlcoin/blob/master/doc/release-notes/release-notes-2.17.2.md#label-and-account-apis-for-wallet) 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 `validateaddress`and `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 thehash 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 Feerate 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 the`disable_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 sendingto 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 usecase 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" forvalid 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 the`bip32derivs` 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 misbehavior (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 of time (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 [projectpage](https://github.com/bitcoin-core/HWI#readme) for details.
  • This release changes the Random Number Generator (RNG) used from OpenSSL to Groestlcoin Core's own implementation, although entropygathered 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 fromover 100 blocks behind the current chain tip, or when reindexing chaindata. This helps prevent these operations from taking an excessively long time because the operating system is attempting to conserve power.

Important

Make a copy your wallet.dat file as a backup and move it to a secure location:
Location Windows: Navigate to C:\Users\Username\AppData\Roaming\groestlcoin\wallet.dat (or open windows explorer and enter %appdata%\Groestlcoin\wallet.dat)
Location Mac: Finder -> Go {Hold Option] -> Library -> groestlcoin -> wallet.dat (~/Library/Application Support/groestlcoin/wallet.dat)

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 users: https://groestlcoin.org/forum/index.php?topic=441.0
  • Linux users: https://groestlcoin.org/forum/index.php?topic=97.0

Source – OSX – Windows – Linux

BIP39 Key Tool

What am I?

Bip39 Key Tool is a standalone tool which can be used offline to generate Groestlcoin public and private keys..

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.
  • Presets 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

Source – Windows

Groestlcoin Testnet P2pool update

What am I?

Groestlcoin Testnet P2pool is a decentralized Groestlcoin testnet mining pool that works by creating a peer-to-peer network of miner nodes

Changelog

  • Updated so it is compatible with Groestlcoin Core v2.18.2

Features

  • No registration required. To join a p2pool, all you need is your payout address
  • The P2Pool network is DDOS resistant, if the node you are mining on is down, you can just switch to another node, without losing any shares
  • If a node is compromised, the attacker cannot steal any of the worker's payouts
  • Miners get higher payouts than normal pools because they receive transactions fees from block rewards
  • SegWit compatibility
  • CSV compatibility
  • Bech32 compatibility
  • p2sh-segwit compatibility
  • BIP65 compatibility
  • BIP66 compatibility
  • Requires Groestlcoin >= 2.16.0
  • Bootstrap address list
  • Small statistical advantages increasing income
  • Control over your own pool node
  • No need to trust a pool operator
  • Immediate payments
  • Helps to protect and keep the groestlcoin testnet network decentralized
  • Open source - Opensourced, written in Python

Source – Live Version

Groestlcoin-wpf 2.19.0.18

What am I?

Groestlcoin-wpf is an alternative full node client with optional lightweight "thin client" mode based on WPF. WPF, which stands for Windows Presentation Foundation, is Microsoft's latest approach to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include lite wallet mode which does not requiring the download of the entire block chain.

Changelog 2.19.0.18:

  • Bech32 support
  • P2sh support
  • Fixed Import/Export to wallet.dat
  • Testnet Support
  • Rescan wallet option
  • Change wallet password option
  • Addresstype and Changetype 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.

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 parallely. 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, parralel 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

Groestlcoin-WPF Database Modes

  • Full mode - Customized DBLite library format. It uses persistent HashTable with parallel transactions. Non-compatible with other wallets. groestlcoin-wpf is set to ‘full mode’ by default.
  • Lite (SPV) mode - Lite mode brings lightning-fast syncing with the Groestlcoin blockchain. Design based on the principles of the "Simplified Payment Verification" or “SPV” system outlined in section 8 of Satoshi’s Whitepaper. We’ve integrated optional lite functionality within the wallet.

Important:
Groestlcoin-WPF uses a filename wallet.db instead of wallet.dat (like in Groestlcoin-QT)
Location Windows: Navigate to C:\Users\USER NAME\AppData\Roaming\Groestlcoin-WPF (or open windows explorer and enter %appdata%\Groestlcoin-WPF) and back up your wallet.db file by making a copy of it and moving it to a secure location.

Source – Windows

Hodl GRS Android

What am I?

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 Hodl GRS's core design principle. 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

Source – Google Play

Hodl GRS Testnet Android

What am I?

HODL GRS Testnet 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 Hodl GRS Testnets core design principle. 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 Testnet 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

Source – Google Play

Seed Savior

What am I?

Seed Savior 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 adresses in various formats.
To find out if one of the suggested addresses is actually 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 available at https://www.groestlcoin.org/recovery/ But it is recommended to download Seed Savior offline and run it on your pc. Open mnemonic-standalone.html to get started.

Source – Live version – Offline Download

Testnet Seed Savior

What am I?

Tetsnet Seed Savior is meant to help users with recovering a slightly incorrect Groestlcoin testnet mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived adresses in various formats.
To find out if one of the suggested addresses is actually the right one, you can click on the suggested address to check the address' transaction history on a testnet 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 available at https://www.groestlcoin.org/recovery-test/ But it is recommended to download Testnet Seed Savior offline and run it on your pc. Open mnemonic-standalone.html to get started.

Source – Live version – Offline Download

Electrum Personal Server

What am I?

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 fulfills 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 of Groestlcoin Core's resource-saving features like pruning, blocksonly and disabled txindex. All of Electrum-GRS's feature-richness like hardware wallet integration, multisignature 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 an big part of what makes the system be trustless. 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.

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

How To

  • If you dont already have them, download and install Groestlcoin Core version 2.17.2 or higher. The Groestlcoin node must have wallet enabled, and must have the RPC server switched on (server=1 in groestlcoin.conf). On first run, it is recommended to create a wallet dedicated to Groestlcoin Electrum Personal Server using the command line argument groestlcoin-cli createwallet electrumpersonalserver true.
  • If you dont already have it, download and install Electrum-grs wallet, and set up your Electrum-grs wallet (for example by linking your hardware wallet). To avoid damaging privacy by connecting to public Electrum-GRS servers, disconnect from the internet first or run Electrum-grs with the command line argument --server localhost:50002:s.
  • Download the latest release of Groestlcoin Electrum Personal Server. If using Windows OS take the packaged binary release build electrum-grs-personalserver-windows-release-XXX.zip.
  • Extract and enter the directory, and copy the file config.ini_sample to config.ini. Edit the file config.ini to configure everything about the server. Add your wallet master public keys or watch-only addresses to the [master-public-keys] and [watch-only-addresses] sections. Master public keys for an Electrum-grs wallet (which start with xpub/ypub/zpub/etc) can be found in the Electrum-grs client menu Wallet -> Information. You can add multiple master public keys or watch-only addresses by adding separate lines for the different keys/addresses:
    wallet1 = xpub661MyMwAqRbcF...
    wallet2 = xpub7712KLsfsg46G...
  • If you created a wallet dedicated to Groestlcoin Electrum Personal Server in Groestlcoin Core, you have to modify the line wallet_filename in the [groestlcoin-rpc] section with the name of the wallet, for example electrumpersonalserver.
  • If using the windows packaged binary release, drag the file config.ini onto the file electrum-personal-server.exe to run the server, or on the command line run electrum-personal-server config.ini.
  • If installing from the source release, install Groestlcoin Electrum Personal Server in your home directory with pip3 install --user .. On Linux the script electrum-personal-server will be installed in ~/.local/bin. Please note, if for some reason, you want to make a system-wide install, simply run pip3 install . as root (e.g. if you have sudo setup, you could use: sudo pip3 install .). Run electrum-personal-server /path/to/config.ini to start Groestlcoin Electrum Personal Server.
  • The first time the server is run it will import all configured addresses as watch-only into the Groestlcoin node, and then exit. If the wallets contain historical transactions you can use the rescan script (electrum-personal-server --rescan /path/to/config.ini) to make them appear. If using the windows packaged binary release build then drag the file config.ini onto the file electrum-personal-server-rescan.bat.
  • Run the server again which will start Groestlcoin Electrum Personal Server. Wait until the message Listening for Electrum-grs Wallet ... appears and then tell Electrum-grs to connect to the server in Tools -> Server. By default the server details are localhost if running on the same machine. Make sure the port number matches what is written in config.ini (port 50002 by default).

Source – Windows

moonshine

GRS Moonshine Android

What am I?

Built with React Native, GRS 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 it's amount from the wallet's total balance.
  • Ability to Sign & Verify Messages
  • 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.
  • Broadcast raw transactions

Source – Google Play

moonshine

GRS Moonshine iOS

What am I?

Built with React Native, GRS 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 it's amount from the wallet's total balance.
  • Ability to Sign & Verify Messages
  • 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.
  • Broadcast raw transactions

Source – App Store

VanitySearch

What am I?

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

Example how to use (Windows, Intel(R) Core(TM) i9-9980HK 2.4GHz 16 multithreaded cores, GeForce RTX 2080):

C:\Users\Jackie\Desktop\VanitySearch.exe -stop -gpu FXTryMe
VanitySearch v1.16
Difficulty: 15318045009
Search: FXTryMe [Compressed]
Start Fri Jan 17 08:52:52 2020
Base Key: 14B39C627099FCACE9A36C13910F2F3BB82BBDC2307230933364C092D2692966
Number of CPU thread: 15
GPU: GPU #0 GeForce RTX 2080 (46x64 cores) Grid(368x128)
[1413.49 Mkey/s][GPU 1368.35 Mkey/s][Total 2^34.01][Prob 67.8%][70% in 00:00:00][Found 0]
Pub Addr: FXTryMemTGSHNw6BQJkWQ7385oZU7xGqKz
Priv (WIF): p2pkh:KxZMSw7tcbdkUcggrhfDHsfYrGFU4QUeNf7jh6XRLk55G7Q41o5f
Priv (HEX): 0x27F135DC443F74D8C80DD749358F481DA0C96921802BEBE6C5B7D4FBCB8D278C

C:\Users\Jackie\Desktop\VanitySearch.exe -stop -gpu 3MyCoin
VanitySearch v1.16
Difficulty: 15318045009
Search: 3MyCoin [Compressed]
Start Fri Jan 17 08:54:36 2020
Base Key: 7382A0C7A82F7E73FD50FFC939F8C137AE4EDCA155B0EB48DAB7A5FCFF887753
Number of CPU thread: 15
GPU: GPU #0 GeForce RTX 2080 (46x64 cores) Grid(368x128)
[815.47 Mkey/s][GPU 796.55 Mkey/s][Total 2^34.89][Prob 87.4%][90% in 00:00:04][Found 0]
Pub Addr: 3MyCoincPzBHyK8aM1QX6dgKhBEBcA2LPa
Priv (WIF): p2wpkh-p2sh:KzjAzfGSBkUFGRaPzXd7bewaxaoUGaMrGqnNzM7XAZh69KYU4oZa
Priv (HEX): 0x68AB2F01498B7B826E52E7AE87B5583C7238288578F6C8A3A4F93E6A018EC08A

C:\Users\Jackie\Desktop\VanitySearch.exe -stop -gpu grs1quantum
VanitySearch v1.16
Difficulty: 34359738368
Search: grs1quantum [Compressed]
Start Fri Jan 17 08:55:41 2020
Base Key: 97E95720592A4C8370943BA6EDDE58777DDAEBC7868AF74A9D953A07E159CDD5
Number of CPU thread: 15
GPU: GPU #0 GeForce RTX 2080 (46x64 cores) Grid(368x128)

Pub Addr: grs1quantummzkczqvtshflzaq070azl43s7cuzz06f
Priv (WIF): p2wpkh:L5fivFHygeeGSQFiJVxR5j6e7jn9ZtDwB6caP6TJGfctCLtvgS6j
Priv (HEX): 0xFC14C106F47022CB56A965F993D6725FE84029751A7A9394350F0B3676D2197B

Wildcards
Supported wildcard characters include: ? - any one character * - any number of characters

Considerations:
a pattern such as Ftest is the same as Ftest*
F?test will generate no matches, but F?test* will. If ? is used, then other wildcards must be used to match a 35 character address (for legacy addresses).
F?t* is the same asF?t???????????????????????????????

Impossible second character prefixes for F address
F1 F2 F3 F4 F5 F6 F7 F8 F9 Fw Fy Fu FU FP FA FS FD FF FG FH FJ FK FL Fz Fx FC Fv FV FB FN FM

Possible prefixes for 3 address
31h2 to 3R2c only

Source – Windows

Groestlcoin EasyVanity 2020

What am I?

If you're tired of the random, cryptic bech32 addresses generated by regular groestlcoin clients, then Groestlcoin EasyVanity 2020 is the right choice for you to create a more personalized bech32 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)
  • 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)
  • Automatically detects 32 or 64 bit systems
  • 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.

Source – Windows

Android Wallet

What am I?

Android wallet is a Hierarchical Deterministic Groestlcoin Wallet.

Changelog Groestlcoin Wallet v7.38.1

• 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.

Changelog Groestlcoin Wallet v7.11.1
• Listed on Fdroid
• Add 3 more blockexplorers: Groestlsight, blockbook and Blockchair.
• Updated checkpoints
• Update electrum-grs list with server fingerprints
• Remove unused features.
• Remove labs feature: Look up wallet names from the domain name system.
• Fix app shortcuts for Android 7.1 devices
• Fix crash when archiving a wallet backup on some devices.
• For Android 8.0 (Oreo) and above, support notification channels and adaptive launcher icons.
• Disconnects from incompatible peers much quicker.
• For Android 7.0 (Nougat) and above, multiple 'coins received' notifications are bundled into a notification group.
• New alert for users with insecure Bluetooth.
• Use a lot less memory for displaying QR codes.
• Fix crash on Pixel 2 devices.
• Fix crash with very inflated fiat currencies.
• Add a warning dialog regarding a relatively high fee.
• Clarify message when fetching/validating the payment request fails.
• Backing up makes use of the Storage Access Framework (SAF). For most users, this means encrypted backups are stored on Google Drive, but other cloud storage providers can also be used.
• Fix certain payments not showing up until they are confirmed.
• In payment history, always show fiat amount directly below Groestlcoin value.
• A splash icon is shown while the app is loading.
• The QR code scanner now supports portrait orientation.
• Run circular reveal transition if QR code scanner is started via lower action bar.
• Update build to Gradle 3.3+ and Android Plugin for Gradle 2.3.3.
• Use the Room Persistence Library for access to the address book database.
• For Android 9.0 (Pie) and above, the FOREGROUND_SERVICE permission is now being requested.
• Adds a network security configuration.
• Fix rarely occurring crash when backing up the wallet.
• Migrate support libraries and architecture components to AndroidX.
• Add another backup reminder.
• Fix crashes when opening dialogs at the wrong time.
• Remove ability to restore backups from list of base58-encoded private keys.
• The app now requires Android 5.0 (Lollipop) or higher.
• Segregated Witness - Phase I: Send to native segwit (Bech32) addresses.
• Segregated Witness - Phase II: Receive to and spend from native segwit (Bech32) addresses.
• Segregated Witness - Phase III: Existing wallets without spending PIN are upgraded to use native segwit (Bech32) addresses.
• Segregated Witness - Phase IV: Existing wallets with spending PIN can be upgraded by changing or removing the PIN.
• Option to request coins to a legacy address (in case a sender doesn't support Bech32).
• Double the capacity of the block store.
• Make more room for transactions list by scrolling away the balance panel.
• Based on groestlcoinj 0.15.2.

Changelog Groestlcoin Wallet v5.24.2 :
• Updated icons/graphics
• Can receive v2 transactions (if not RBF) without waiting for a block confirmation
• Fixed widget preview to reflect GRS

Changelog Groestlcoin Wallet v5.24.1 :
• After a couple of weeks of not being used, the app will notify if there are still coins in the wallet.
• Improve mechanism for setting a trusted peer and warn if its hostname cannot be resolved.
• Add warning to RBF (replace-by-fee) transactions
• On Android 6.0 (Marshmellow) and above, you can now grant or revoke app permissions at will. The current permissions are: Camera (for scanning QR codes) and Read/Write External Storage (for wallet backups).
• Strengthen security of spending PIN.
• Speed up wallet decryption when using a spending PIN
• Supports HTTP/2 and ALPN on all HTTP calls (e.g. payment protocol).
• Slightly more robust scanning of QR codes.
• Fix detection of network state. This needs the ACCESS_NETWORK_STATE permission
• The app now requires Android 4.1 (Jelly Bean) or higher. This makes UI development easier in future.
• For Android 6.0 (Marshmellow) and above, bring back the ability to receive payments via Bluetooth. This means your customers can pay without being connected to the internet!
• Nicely animated appearance of main screen on phones.
• Query a set of Electrum-GRS servers to swipe paper wallets

Changelog Groestlcoin Wallet 4.46.2 :
• Automatically close send coins dialog if payment was successful. This can be disabled in the settings.
• Adjusts to the new network fee rules imposed by Groestlcoin Core.
• Now requires Android 4.0.3 (ICS) for all subprojects.
• Hint to enable storage encryption.
• Allow raising the fee of an unconfirmed transaction. Uses child-pays-for-parent (CPFP).
• Pay the default fee for sweeping paper wallets.
• Setting for own name, to be added as a label/memo to payment requests.
• List animations for network monitor.
• Migrate build from Maven to Gradle. This should make things easier for Android Studio users.
• In-app payments integration (integration-android) now available on Maven Central and jCenter.
• Nice slide-in animation for sent payment.
• Tint incoming transactions in green, outgoing in red.
• Tint action bar labels.
• Material design for list of transactions.
• Update android-maven-plugin to 4.2.0, so we can use AARs.
• Use action bar submenu for filtering wallet transactions, rather than a ViewPager.
• Speed up transactions list.
• Update QR-code scanner to ZXing 3.2.0.
• Show derived addresses in address book under "your addresses".
• Show "to addresses" of received payments, rather than "from addresses".
• Speed up blockchain sync.
• Improve entry of password in backup wallet dialog.
• Share current wallet address by tapping on it.
• Update dialogs to material theme on Lollipop devices.
• Show and share extended public key. This can be used to grant read-only access to your wallet. The new option is available in the diagnostics settings.
• Record fiat amount for sent payments.

Features

• Sweep paper wallets
• Transparant - free and open source
• Blockexplorer support
• Network monitor
• Backup/restore option
• Spending pin
• xpub support
• Ability to reset blockchain
• Ability to change denomination
• Ability to connect to trusted peer
• Connectivity indicator
• BIP70 support

If the app crashes you can send the report via email or another method if your phone allows it. Reports of errors can also be posted in this topic.
To close the app, simply press the back button until you reach your home screen. The app will close itself (there is no need for a disconnect option).
This application is licensed under the GPL version 3. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

Source – Google Play – Fdroid

Android Testnet Wallet

What am I?

Android testnet wallet is a Hierarchical Deterministic Groestlcoin Wallet.

Changelog Groestlcoin Wallet v7.38.1
• 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.
• Now available also on Fdroid

Changelog Groestlcoin Wallet v7.11.1
• Add 3 more blockexplorers: Groestlsight and blockbook.
• Updated checkpoints
• Update electrum-grs list with server fingerprints
• Remove unused features.
• Remove labs feature: Look up wallet names from the domain name system.
• Fix app shortcuts for Android 7.1 devices
• Fix crash when archiving a wallet backup on some devices.
• For Android 8.0 (Oreo) and above, support notification channels and adaptive launcher icons.
• Disconnects from incompatible peers much quicker.
• For Android 7.0 (Nougat) and above, multiple 'coins received' notifications are bundled into a notification group.
• New alert for users with insecure Bluetooth.
• Use a lot less memory for displaying QR codes.
• Fix crash on Pixel 2 devices.
• Fix crash with very inflated fiat currencies.
• Add a warning dialog regarding a relatively high fee.
• Clarify message when fetching/validating the payment request fails.
• Backing up makes use of the Storage Access Framework (SAF). For most users, this means encrypted backups are stored on Google Drive, but other cloud storage providers can also be used.
• Fix certain payments not showing up until they are confirmed.
• In payment history, always show fiat amount directly below Groestlcoin value.
• A splash icon is shown while the app is loading.
• The QR code scanner now supports portrait orientation.
• Run circular reveal transition if QR code scanner is started via lower action bar.
• Update build to Gradle 3.3+ and Android Plugin for Gradle 2.3.3.
• Use the Room Persistence Library for access to the address book database.
• For Android 9.0 (Pie) and above, the FOREGROUND_SERVICE permission is now being requested.
• Adds a network security configuration.
• Fix rarely occurring crash when backing up the wallet.
• Migrate support libraries and architecture components to AndroidX.
• Add another backup reminder.
• Fix crashes when opening dialogs at the wrong time.
• Remove ability to restore backups from list of base58-encoded private keys.
• The app now requires Android 5.0 (Lollipop) or higher.
• Segregated Witness - Phase I: Send to native segwit (Bech32) addresses.
• Segregated Witness - Phase II: Receive to and spend from native segwit (Bech32) addresses.
• Segregated Witness - Phase III: Existing wallets without spending PIN are upgraded to use native segwit (Bech32) addresses.
• Segregated Witness - Phase IV: Existing wallets with spending PIN can be upgraded by changing or removing the PIN.
• Option to request coins to a legacy address (in case a sender doesn't support Bech32).
• Double the capacity of the block store.
• Make more room for transactions list by scrolling away the balance panel.
• Based on groestlcoinj 0.15.2.

Changelog Groestlcoin Testnet Wallet v5.24.2
• Updated icons/graphics
• Can receive v2 transactions (if not RBF) without waiting for a block confirmation
• Fixed widget preview to reflect GRS

Features
• Sweep testnet paper wallets
• Transparant - free and open source
• Testnet blockexplorer support
• Network monitor
• Backup/restore option
• Spending pin
• tpub support
• Ability to reset blockchain
• Ability to change denomination
• Ability to connect to trusted peer
• Connectivity indicator
• BIP70 support

If the app crashes you can send the report via email or another method if your phone allows it. Reports of errors can also be posted in this topic.
To close the app, simply press the back button until you reach your home screen. The app will close itself (there is no need for a disconnect option).
This application is licensed under the GPL version 3. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

Source – Google Play – Fdroid

Android Groestlcoin Sentinel v3.5.06

What am I?

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.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.

Changelog v3.5.06:

  • Removed Cryptopia
  • Added adaptive icons for Android 8 and above
  • Add blockbook blockexplorer

Changelog v3.5.02:

  • 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

Changelog v2.7.1:

  • Added refresh button
  • Groestlsight blockexplorer support
  • Haptic PIN entry support
  • Track Segwit BIP49 YPUBs extended pubkeys
  • Sweep P2PKH and Segwit P2SH-P2WPHK amounts into selected account/address
  • Use https for blockexplorers

Features

  • Open source and unlicensed.
  • No Private Keys - Groestlcoin Sentinel only uses Public Keys. It never knows or never asks for your Private Keys.
  • Track multiple XPUB's, YPUB's, ZPUB's or Addresses - Add multiple XPUB's, YPUB's, ZPUBS's or addresses to your Groestlcoin Sentinel Watchlist to keep track of balances, transactions, and accept payments into any added wallet or address.
  • Deterministically derives Groestlcoin Addresses - Deterministically derive new Groestlcoin addresses associated with your added wallets without needing access or knowledge to your private keys.
  • Shareable QR code - Create payment request QR codes with address and amount encoded directly into the image. Share with anyone or any app directly from Groestlcoin Sentinel.
  • The most popular Fiat currencies - Groestlcoin Sentinel can convert GRS to your local currency. Supported currencies are: USD, EUR, GBP, CNY, KRW and RUB
  • Exchanges - Groestloin Sentinel can pull the current Fiat price from Cryptopia, Bittrex, Binance and Upbit.
  • Secure PIN Code protection - Add a secure PIN code to protect access to Groestlcoin Sentinel. Optionally turn on PIN Scramble to help thwart against keylogger attacks.

Source – Google Play

Android Groestlcoin Sentinel Testnet v3.5.06

What am I?

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

Changelog v3.5.06:

  • Added adaptive icons for Android 8 and above
  • Add blockbook testnet blockexplorer

Features

  • Sweep P2PKH, Segwit BIP49 (P2SH-P2WPHK) and Segwit BIP84 (bech32) amounts into selected account/address
  • Broadcast hex tx
  • Receive address closes upon receipt of testnet groestlcoins
  • Refresh button
  • Multiple blockexplorers support
  • Haptic PIN entry support
  • Open source and unlicensed.
  • No Private Keys - Groestlcoin Sentinel Testnet only uses Public Keys. It never knows or never asks for your Private Keys.
  • Track multiple TPUB's, UPUB's, VPUB's or Addresses - Add multiple TPUB's, UPUB's, VPUBS's or addresses to your Groestlcoin Sentinel Testnet
  • Watchlist to keep track of balances, transactions, and accept payments into any added wallet or address.
  • Deterministically derives Groestlcoin Testnet Addresses - Deterministically derive new Groestlcoin Testnet addresses associated with your added wallets without needing access or knowledge to your private keys.
  • Shareable QR code - Create payment request QR codes with address and amount encoded directly into the image. Share with anyone or any app directly from Groestlcoin Sentinel Testnet.
  • Secure PIN Code protection - Add a secure PIN code to protect access to Groestlcoin Sentinel Testnet. Optionally turn on PIN Scramble to help thwart against keylogger attacks.

Source – Google Play