Groestlcoin 22nd March Release – 7 Year Anniversary

Groestlcoin Release March 2021

The past year of Groestlcoin must be the strangest year for the world in the existence of the coin so far. Covid-19 has and continues to dominate the headlines. Our hearts go out to everyone that has been affected by the virus, directly or indirectly.

This year has also seen a meteoric rise in Bitcoin and the total cryptocurrency market cap whilst the global economy almost grind to a halt in many industries. Many countries have implemented expensive policies to try to negate a recession, leading to a significant rise in new money being printed. On the brighter side, the development of Groestlcoin has been largely unaffected by the pandemic and we have a further 9 (12, including testnet) development updates to bring you today.

We will start with the brand new releases and then move on to the updates to existing applications which we are committed to keeping updated for security and functionality updates.

What’s Being Released Today?

 

GROESTLCOIN DEVELOPMENT RELEASE

Electrum-GRS 4.0.9

What am I?

If you are an ordinary user of Groestlcoin and simply want the convenience of a web wallet with the security of a real application and support for multi-signature, then Elecrum-GRS is the right choice for you.

Changelog Electrum-GRS 4.0.9

• fixes a regression introduced in 4.0.8, that prevents from paying BIP70 invoices
• reflect frozen channels and disconnected peers in the displayed 'can send/can receive' amounts.

Features

  • Encrypted wallet - the file that contains your groestlcoins is protected with a password. You are protected from thieves.
  • Deterministic key generation - If you lose your wallet, you can recover it from its seed. You are protected from your own mistakes.
  • Instant on - the client does not download the blockchain, it requests that information from a server. No delays, always up-to-date.
  • Freedom and Privacy - The server does not store user accounts. You are not tied to a particular server, and the server does not need to know you.
  • No scripts - Electrum-GRS does not download any script. A compromised server cannot send you arbitrary code and steal your groestlcoins.
  • No single point of failure - The server code is open source, anyone can run a server.
  • Transactions are signed locally - Your private keys are not shared with the server. You do not have to trust the server with your money.
  • Firewall friendly - The client does not need to open a port, it simply polls the server for updates.
  • Free software - Gnu GPL v3. Anyone can audit the code.
  • Written in Python - The code is short, and easy to review.
  • User Friendly - Support for Groestlcoin URIs, signed URIs and Groestlcoin aliases
  • No Lock-In - You can export your private keys and use them in other groestlcoin clients.
  • No Downtimes - Electrum-GRS servers are decentralized and redundant. Your wallet is never down.
  • Proof Checking - Electrum-GRS Wallet verifies all the transactions in your history using SPV.
  • Cold Storage - Keep your private keys offline, and go online with a watching-only wallet. Sign transactions from a computer that is always offline. Broadcast them from a machine that does not have your keys.
  • Multisign - Split the permission to spend your coins between several wallets using parallel BIP32 derivations and P2SH addresses ("2 of 2", "2 of 3"). Compact serialization format for unsigned or partially signed transactions, that includes the BIP32 master public key and derivation needed to sign inputs. Serialized transactions can be sent to cosigners or to cold storage using QR codes.

OSXWindowsWindows StandaloneWindows PortableLinux

Server SourceServer Installer SourceClient Source

Android Electrum-GRS 4.0.9

What am I?

If you are an ordinary user of Groestlcoin and simply want the convenience of a web wallet with the security of a real application and support for multi-signature, then Elecrum-GRS is the right choice for you.

Changelog Electrum-GRS 4.0.9

• fixes a regression introduced in 4.0.8, that prevents from paying BIP70 invoices
• reflect frozen channels and disconnected peers in the displayed 'can send/can receive' amounts..

Features

  • Encrypted wallet - the file that contains your groestlcoins is protected with a password. You are protected from thieves.
  • Deterministic key generation - If you lose your wallet, you can recover it from its seed. You are protected from your own mistakes.
  • Instant on - the client does not download the blockchain, it requests that information from a server. No delays, always up-to-date.
  • Freedom and Privacy - The server does not store user accounts. You are not tied to a particular server, and the server does not need to know you.
  • No scripts - Electrum-GRS does not download any script. A compromised server cannot send you arbitrary code and steal your groestlcoins.
  • No single point of failure - The server code is open source, anyone can run a server.
  • Transactions are signed locally - Your private keys are not shared with the server. You do not have to trust the server with your money.
  • Firewall friendly - The client does not need to open a port, it simply polls the server for updates.
  • Free software - Gnu GPL v3. Anyone can audit the code.
  • Written in Python - The code is short, and easy to review.
  • User Friendly - Support for Groestlcoin URIs, signed URIs and Groestlcoin aliases
  • No Lock-In - You can export your private keys and use them in other groestlcoin clients.
  • No Downtimes - Electrum-GRS servers are decentralized and redundant. Your wallet is never down.
  • Proof Checking - Electrum-GRS Wallet verifies all the transactions in your history using SPV.
  • Cold Storage - Keep your private keys offline, and go online with a watching-only wallet. Sign transactions from a computer that is always offline. Broadcast them from a machine that does not have your keys.
  • Multisign - Split the permission to spend your coins between several wallets using parallel BIP32 derivations and P2SH addresses ("2 of 2", "2 of 3"). Compact serialization format for unsigned or partially signed transactions, that includes the BIP32 master public key and derivation needed to sign inputs. Serialized transactions can be sent to cosigners or to cold storage using QR codes.

Google Play

Server SourceServer Installer SourceClient Source

C-lightning 0.9.3

What am I?

C-Lightning is a specification-compliant Lightning Network implementation built in C. It is a lightweight, highly customisable and standard compliant implementation of the Lightning Network protocol. C-Lightning only works on Linux and Mac OS and requires a local or remote instance of Groestlcoind (version 2.16 or above) that is fully synced to the correct blockchain.

Changelog 0.9.3

• Much improved parameter verification in lightning-cli makes it easier to debug why a call failed.
• You can now query for the status of an invoice based on the hash or the invoice.
• Plugins that are started while the node is running can now receive command line arguments as if they were provided at node startup.
• The security of the hsmtool used to encrypt and decrypt the node's seed key was improved by switching to a passphrase prompt instead of a command line argument.
• Multiple plugins can now register for the db_write hook, which means you can now run multiple backup plugins at the same time. In addition we wrote extensive documentation on how to secure your node from dataloss.
• No more reckless: the default network changed from testnet to groestlcoin.
• We have experimental support for the onion messages proposal, allowing arbitrary messages to be exchanged between nodes in the network.
• We have experimental support for the offers proposal, enabling reusable invoices, refunds, invoices denominated in currencies other than groestlcoins, and much much more. If you ever wanted to have an inline communication step with the other endpoint of a payment then take a look at this.
• pyln now supports both receiving notifications from the RPC interface, as well as sending notifications in methods implemented by plugins. No more waiting in front of a blank screen for your users.
• The new createinvoice allows you to create an invoice externally, then have your node sign it and manage it internally.
• You can use sendonionmessage to send an onion routed message, which recipient can receive using a plugin that register for the onion_message or onion_message_blinded hook.

Features

  • Ability to create new channels
  • Ability to close existing channels
  • Completely manage all channel states, including exceptional ones
  • Performing path-finding within the network, passively forwarding incoming payments
  • Sending outgoing onion-encrypted payments through the network
  • Automatic channel management (auto-pilot)

SourceBuilding instructions LinuxBuilding instructions for OSX

GRS

What am I?

GRS is a real standalone Groestlcoin client. There is no server to get hacked or go down, so you can always access your money. Using SPV mode, GRS connects directly to the Groestlcoin network with the fast performance you need on a mobile device.
GRS is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, and verified boot, GRS represents a significant security advance over web and desktop wallets.
Simplicity is GRS's core design principle. A simple backup phrase is all you need to restore your wallet on another device if yours is ever lost or broken. Because GRS is deterministic, your balance and transaction history can be recovered from just your backup phrase.

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

Warning
Installation on rooted devices is strongly discouraged

Important:
When using this app, please store your secret phrase somewhere safe! Then your coins can be retrieved even if you loose your phone. Furthermore, this puts the user in total control of their funds at any given time.

SourceGoogle Play

GRS Testnet

What am I?

GRS testnet is a real standalone Groestlcoin testnet client. There is no server to get hacked or go down, so you can always access your money. Using SPV mode, GRS testnet connects directly to the Groestlcoin testnet network with the fast performance you need on a mobile device.
GRS testnet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, and verified boot, GRS testnet represents a significant security advance over web and desktop wallets.
Simplicity is GRS testnets core design principle. A simple backup phrase is all you need to restore your wallet on another device if yours is ever lost or broken. Because GRS testnet is deterministic, your balance and transaction history can be recovered from just your backup phrase.

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

Warning
Installation on rooted devices is strongly discouraged

Important:
When using this app, please store your secret phrase somewhere safe! Then your coins can be retrieved even if you loose your phone. Furthermore, this puts the user in total control of their funds at any given time.

SourceGoogle Play

HWI

What am I?

Groestlcoin Hardware Wallet Interface (HWI) provides a standard way for software to work with hardware wallets without needing to implement device specific drivers.
Caveat emptor: Inclusion of a specific hardware wallet vendor does not imply any endorsement of quality or security.

Features

  • Support for KeepKey
  • Support for Ledger Nano S
  • Support for Ledger Nano X
  • Support for Trezor Model T
  • Support for Trezor One
  • The software is built in Python
  • Open Source - MIT license

SourceOsx – WindowsLinux

GRSPay v1.0.7.0

What am I?

GRSPay is a free, open-source, non-custodial cryptocurrency payment processor which allows you to receive payments in Groestlcoin with no fees, transaction cost or middlemen. GRSPay eliminates the involvement of a third-party. Payments with GRSPay go directly to your wallet, which increases the privacy and security. Your private keys are never visible to the GRSPay Server or anyone else. There is no address re-use since each invoice generates a new address deriving from your public key.

https://www.youtube.com/watch?v=c7s3zZnlQ6M

https://www.youtube.com/watch?v=qNMTDEPhWhY

Changelog v1.0.7.0

  • New Wallet Setup UI
  • Hardware support for GRS

Features

  • Direct, P2P Groestlcoin payments
  • Lightning Network support
  • Complete control over private keys
  • Enchanced privacy
  • SegWit support
  • Process payments for others
  • Payment buttons
  • Point of sale
  • No transaction fees (other than those for the crypto networks)
  • No processing fees
  • No middleman
  • No KYC
  • The software is built in C#
  • You can run GRSPay as a self-hosted solution on your own server or use a our host. The self-hosted solution allows you not only to attach an unlimited number of stores but also become the payment processor for others.
  • Open Source - MIT license

SourceLive Site

GRSPay Testnet v1.0.7.0

What am I?

GRSPay Testnet is a free, open-source, non-custodial cryptocurrency payment processor which allows you to receive payments in Groestlcoin testnet with no fees, transaction cost or middlemen. GRSPay Testnet eliminates the involvement of a third-party. Payments with GRSPay Testnet go directly to your wallet, which increases the privacy and security. Your private keys are never visible to the GRSPay Testnet Server or anyone else. There is no address re-use since each invoice generates a new address deriving from your public key.

https://www.youtube.com/watch?v=c7s3zZnlQ6M

https://www.youtube.com/watch?v=qNMTDEPhWhY

Changelog v1.0.7.0

  • New Wallet Setup UI
  • Hardware support for GRS

Features

  • Direct, P2P Groestlcoin Testnet payments
  • Lightning Network Testnet support
  • Complete control over private keys
  • Enchanced privacy
  • SegWit Testnet support
  • Process payments for others
  • Payment buttons
  • Point of sale
  • No transaction fees (other than those for the crypto networks)
  • No processing fees
  • No middleman
  • No KYC
  • The software is built in C#
  • You can run GRSPay Testnet as a self-hosted solution on your own server or use a our host. The self-hosted solution allows you not only to attach an unlimited number of stores but also become the payment processor for others.
  • Open Source - MIT license

SourceLive Site

GRSPay Vault

What am I?

GRSPay Vault is a separate app, locally hosted on your own PC, which GRSPay Server connects to and asks for permission. Once permission is granted, GRSPay is able to integrate with any hardware wallet connected to your PC.
You can import your wallet and spend incoming funds with a simple confirmation on your device with your keys never leaving your hardware device.

Features

  • Support for Mainnet and Testnet
  • Support for KeepKey
  • Support for Ledger Nano S
  • Support for Ledger Nano X
  • Support for Trezor Model T
  • Support for Trezor One
  • Asks permission before connecting
  • The software is built in C#
  • Open Source - MIT license

Getting Started with GRSPay Vault

Download GRSPay Vault
Install GRSPay Vault on your PC (Windows, MacOS or Linux)
Open GRSPay Vault app.
Plug in the hardware wallet and make sure it’s in wake up state
Go to GRSPay Server’s Store > General Settings > Wallet > Setup > Connect an existing wallet > Connect hardware wallet
Grant the permission
Your public key will automatically be imported in the store and configured to an appropriate format
Validate that address shown on GRSPay is the same as the one on your device
Save

Spending funds with GRSPay Wallet

Open GRSPay Vault app on your PC
Plug in the hardware wallet and make sure it’s in wake up state
In GRSPay Server, go to > Wallets > Manage > Send
Fill in the Destination address and the Amount
Select Sign with a hardware wallet
Verify the transaction on your hardware wallet and confirm it
Broadcast the transaction

Note: OSX build does not work with Safari, use Chrome or Firefox instead.

SourceOsx – WindowsLinux

Sparrow-GRS

What am I?

Sparrow-GRS does not hide information from you - on the contrary it attempts to provide as much detail as possible about your transactions and UTXOs, but in a way that is manageable and usable.
However, Sparrow-GRS is also unique in that it contains a fully featured transaction editor that also functions as a blockchain explorer. This feature not only allows editing of all of a transaction’s fields, also easy inspection of the transaction bytes before broadcasting.

Features

  • Full support for single sig and multisig wallets on common script types
  • Connect to public Electrum-GRS servers
  • Standards based including full PSBT support
  • Support for KeepKey
  • Support for Ledger Nano S
  • Support for Ledger Nano X
  • Support for Trezor Model T
  • Support for Trezor One
  • Full coin and fee control with comprehensive coin selection
  • Labeling of all transactions, inputs and outputs
  • Lightweight and multi platform
  • Payjoin support
  • Built in Tor
  • Testnet, regtest and signet support

SourceOsx – WindowsLinux

 

GRS RPC Explorer

What am I?

GRS RPC Explorer is a simple, self-hosted explorer for the Groestlcoin blockchain, driven by RPC calls to your own Groestlcoin node. It is easy to run and can be connected to other tools (like ElectrumX) to achieve a full-featured explorer.
Whatever reasons one may have for running a full node (trustlessness, technical curiosity, supporting the network, etc) it's helpful to appreciate the "fullness" of your node. With this explorer, you can explore not just the blockchain database, but also explore the functional capabilities of your own node.

Features

  • Network Summary dashboard
  • View details of blocks, transactions, and addresses
  • Analysis tools for viewing stats on blocks, transactions, and miner activity
  • See raw JSON content from groestlcoind used to generate most pages
  • Search by transaction ID, block hash/height, and address
  • Optional transaction history for addresses by querying from ElectrumX
  • Mempool summary, with fee, size, and age breakdowns
  • RPC command browser and terminal

SourceLive Version

GRS RPC Explorer Testnet

What am I?

GRS RPC Explorer testnet is a simple, self-hosted explorer for the Groestlcoin testnet blockchain, driven by RPC calls to your own Groestlcoin testnet node. It is easy to run and can be connected to other tools (like ElectrumX) to achieve a full-featured explorer.
Whatever reasons one may have for running a full node (trustlessness, technical curiosity, supporting the network, etc) it's helpful to appreciate the "fullness" of your node. With this explorer, you can explore not just the blockchain database, but also explore the functional capabilities of your own node.

Features

  • Network Summary dashboard
  • View details of blocks, transactions, and addresses
  • Analysis tools for viewing stats on blocks, transactions, and miner activity
  • See raw JSON content from groestlcoind used to generate most pages
  • Search by transaction ID, block hash/height, and address
  • Optional transaction history for addresses by querying from ElectrumX
  • Mempool summary, with fee, size, and age breakdowns
  • RPC command browser and terminal

SourceLive Version