changed the deprecation height calculation to factor in the new block time of 1.25 mins
What is ZClassic?
ZClassic is an implementation of the “Zerocash” protocol. Based on Bitcoin’s code, it intends to offer a far higher standard of privacy through a sophisticated zero-knowledge proving scheme that preserves confidentiality of transaction metadata. Technical details are available in our Protocol Specification.
This software is the ZClassic client. It downloads and stores the entire history of ZClassic transactions; depending on the speed of your computer and network connection, the synchronization process could take a day or more once the blockchain has reached a significant size.
ZClassic is experimental and a work-in-progress. Use at your own risk.
📒 Deprecation Policy
This release is considered deprecated 16 weeks after the release day. There is an automatic deprecation shutdown feature which will halt the node some time after this 16 week time period. The automatic feature is based on block height.
Build ZClassic along with most dependencies from source by running:
Clone the repository
git clone https://github.com/ZclassicCommunity/zclassic.git
git checkout v2.1.1-2
Bitcoin Core – is a free software project for the community released under the MIT license and open source.
Bitcoin Core requires a one-time download of about 300 GB of data, plus another 5-10 GB per month. By default, you will need to store all of this data, but if you enable shrinking, you can only store 6 GB without compromising security. For more information on setting up Bitcoin Core, please read the complete node guide.
#19019 Fix GBT: Restore “!segwit” and “csv” to “rules” key (luke-jr)
P2P protocol and network code
#19219 Replace automatic bans with discouragement filter (sipa)
#19300 Handle concurrent wallet loading (promag)
#18982 Minimal fix to restore conflicted transaction notifications (ryanofsky)
RPC and other APIs
#19524 Increment input value sum only once per UTXO in decodepsbt (fanquake)
#19517 psbt: Increment input value sum only once per UTXO in decodepsbt (achow101)
#19215 psbt: Include and allow both non_witness_utxo and witness_utxo for segwit inputs (achow101)
#19097 Add missing QPainterPath include (achow101)
#19059 update Qt base translations for macOS release (fanquake)
#19152 improve build OS configure output (skmcontrib)
#19536 qt, build: Fix QFileDialog for static builds (hebasto)
Tests and QA
#19444 Remove cached directories and associated script blocks from appveyor config (sipsorcery)
#18640 appveyor: Remove clcache (MarcoFalke)
#19194 util: Don’t reference errno when pthread fails (miztake)
#18700 Fix locking on WSL using flock instead of fcntl (meshcollider)
Bitcoin is a cryptocurrency invented in 2008 by an unknown person or group of people named Satoshi Nakamoto and launched in 2009 when its implementation was released as open source software.
Bitcoin is a cryptocurrency invented in 2008 by an unknown person or group of people named Satoshi Nakamoto and launched in 2009 when its implementation was released as open source software.
Bitcoin has received high praise and criticism. Critics have noted its use in illegal transactions, the large amount of electricity used by miners, price volatility and theft from exchanges. Some economists, including several Nobel laureates, have described it as a speculative bubble. Bitcoin has also been used as an investment, although several regulators have issued investor warnings about Bitcoin.
Bitcoin Private (BTCP), Created in March 2018, it is a community-driven cryptocurrency that has been forked by Zclassic and Bitcoin. BTCP supports zk-SNARKs that mask the sender and receiver information when checking transactions in a public blockchain. It also has a larger block size of 2 MB and a faster block time of 2.5 minutes.
MANO: Masternode is an advanced Masterndoe hosting platform with many features that allow users to easily host a variety of master sites. MANO’s mission is to provide Masternode’s passive income opportunity to a larger audience. We hope that by removing the barrier to entry for many, it is possible to achieve widespread adoption of blockchain technologies.
History of MANO Coin (MANO)
In December 2018, it was announced that the original developers abandoned the project, leaving the half-completed project and a thriving community behind. In January 2019, a small group of community members began planning for community adoption of the project. They obtained most of the assets from the initial project and attracted a number of community members with the appropriate skills and experience to complete the project. Developers, to build a platform, create a blockchain and automate physical servers, come together to restart a project, bigger and better than before.
GIN описывает себя как проект цифровой валюты с открытым исходным кодом, целью которого является предоставление безопасных децентрализованных финансовых решений. Грузовой флот мастер-узлов GINcoin (GIN) доставляется по протоколу GIN Ecosystem Apps (GEA). Протокол GEA, как сообщается, представляет собой набор правил, применяемых DAM (рынком распределенных приложений) и фрахтовщиками для создания и мониторинга децентрализованного грузового флота. Фрахтовый флот GIN предназначен для поддержки работы распределенных приложений или заданий в децентрализованной системе, которая стремится быть устойчивой к отдельным точкам отказа и контроля.GIN describes itself as an open source digital currency project whose goal is to provide secure, decentralized financial solutions. The cargo fleet of GINcoin master nodes (GIN) is delivered using the GIN Ecosystem Apps (GEA) protocol. The GEA protocol is reported to be a set of rules used by DAM (the distributed application market) and freighters to create and monitor a decentralized cargo fleet. The GIN freight fleet is designed to support distributed applications or jobs in a decentralized system that seeks to be resistant to individual points of failure and control.
As reported, the GIN platform is the first organization to adopt the protocol and participate in the creation of the first DAM, which requires its customers to deploy master nodes and will benefit from a distributed network of hosting providers. GIN is the main currency for the GIN platform and provides transaction and management support through the GIN master nodes.
GINcoin is a coin of the GIN Masternode system, which is used for simplified deployment of masternodes (currently it is used in coins SmartCash, ALQO, Horizen, Bulwark, Polis and many others). The price for a month of using the GIN Masternode cloud node is from $ 4.5 per month.
GINCOIN cryptocurrency features
from February 15, 2019 at 16.00 GMT, the GINCOIN blockchain operation is based on the PoW x16rt algorithm (before that – PoW Lyra2Z), in addition, the PoS masternode system is used;
time between blocks – 2 minutes;
block reward – 20 GIN coins (until block 262800 – March 2019), which are divided equally between miners and masternode owners;
the developers implemented a premine of 4% (420 thousand GIN coins);
GIN coins are issued and rewards are distributed to miners and masternode owners according to the following plan:
Monero GUI Wallet – This is a wallet with a graphical interface that provides a pleasant user interface that is adaptable for all types of users, but is especially recommended for less technical people who want to quickly send, receive and store XMR securely.
Simple mode. Designed for less technical users who want to use Monero only in the simplest and fastest way. Open the wallet, automatically connect to the remote host, send / receive XMR, done!
Advanced mode. With all the advanced features you may need. Ideal for experienced Monero users who prefer full control over their wallet and host
Seller Page Get XMR for your business, easy and compatible with hardware wallets like Trezor and Ledger
built-in conversion to the application. No more checking the cost of your XMR online
Blockchain pruning. Not enough disk space? Just use the shortcut to download only 1/3 of the blockchain
Wasabi – This is an open source non-storage Bitcoin wallet focused on confidentiality for desktop computers, which implements a silent shuffling of coins with mathematically proven anonymity – Chaumian CoinJoin.
Wasabi Wallet – it is an open source non-storage Bitcoin wallet for desktop computers that implements Chaumian CoinJoin.
Key privacy features at the network level:
By default, only for Tor.
BIP 158 block filters for a private light client.
Optional connection to a complete user node.
and at the blockchain level:
Intuitive integration with ZeroLink CoinJoin.
Excellent coin selection and marking.
For more information, please see the Wasabi documentation, an archive of knowledge about Bitcoin privacy nuances, and how to use Wasabi properly.
What it the «CoinJoin»?
The mechanism by which several participants combine their coins (or, to be more precise, UTXO) into one large transaction with several inputs and several outputs. The observer cannot determine which output belongs to which input, as well as the participants themselves. This makes it difficult for third-party organizations to keep track of where a particular coin was received from and where it was sent to (unlike normal bitcoin transactions, where there is usually one sender and one recipient).
This can be done using non-storage software such as Wasabi, which eliminates the risk of extinction or theft of funds. Each of the signatures is created on the computers of the participants, so anyone who tries to connect the signatures cannot change the transaction or redirect funds. The funds will always be located at the Bitcoin address that you control.
This can be done in a decentralized way so that the service does not depend on external parties or centralized servers. It is simply necessary for the parties to the transaction.
CoinJoin can be applied several times, and since many transactions are grouped, participants can save on transaction fees. CoinJoin is the preferred method of gaining privacy on the Bitcoin network.
CoinJoin means: “when you want to complete a transaction, find someone else who also wants to complete the transaction and complete the joint transaction together.”
Launched in 2017, Electroneum (ETN) is a mobile cryptocurrency that uses blockchain capabilities to unlock the global digital economy for millions of people in developing countries, with an emphasis on creating a real ecosystem with additional products such as AnyTask.com, ETN Everywhere, Taskschool and ETN Donate.
Electroneum uses a cryptographically sound system that allows you to send and receive your tokens, while your transactions will not be easily detected on the blockchain. This ensures that all token transfers remain completely private by default, but can be verified by a third party if necessary by providing certain keys.
Safety. Using the capabilities of a distributed peer-to-peer consistent network, each transaction in the network is cryptographically secure. Individual wallets have a mnemonic starting number of 25 words, which is displayed only once and can be recorded for wallet backup. Wallet files are encrypted with a passphrase to ensure they are useless if they are stolen.
Electroneum (and its group of companies) have developed proprietary software that can be used in conjunction with this project. This software is subject to the individual terms and conditions that are available at https://electroneum.com.
The V8 software update (Electroneum v188.8.131.52 release) made some fairly radical changes to the Electroneum blockchain, consisting of a new agreed-upon algorithm, which we called the “Proof of Responsibility”, and changed it from a completely undivided blockchain to a moderated one. Blockchain
The moderated blockchain, based on the Proof of Responsibility consensus algorithm, allows Electroneum Ltd to better control the blockchain, while maintaining a good degree of decentralization. Ultimately, this increases our security by making the commercial and economic blockchain model more attractive. In addition to these basic functions, we have included several small changes that contribute to the functionality and scalability of the blockchain.
Bitcoin Core — Modern implementation of the first wallet in the history of cryptocurrencies. In this article we will take a closer look at this software, analyze its pros and cons, and also get acquainted with its main functions. Bitcoin Core is the official open source software. Combining the functions of a bitcoin wallet and a full node with which network participants can maintain its performance.
Its main advantages include:
High level of security. Losing money is only possible if the key is transferred to third parties or the virus enters the computer.
Storage of access keys directly on the user’s PC – there is no transfer of them to third-party servers.
To access the basic functions do not need a complicated setup.
The ability to use the wallet on computers running on all major operating systems (Linux, Windows, MacOS).
On the official service, first of all, all updates are implemented.
There is a possibility of “cold” storage of currency (offline). That allows you to guarantee complete protection against hacker attacks and other hostile actions. But for such amenities you have to pay.
In order not to contact third-party servers for information, you must download the entire blockchain to your computer. To do this, you will have to prepare about 150-200 GB of memory on the hard drive.
Synchronization of the installed blockchain with the network can take about a day or more. At the same time, you can speed up the Bitcoin Core download process only by connecting to the high-speed Internet.
To conduct any transaction, you will have to use your desktop computer, the mobile option is excluded.
Installation and getting started with Bitcoin Core
First of all, you need to download the latest version of the application, suitable for the operating system installed on the user’s computer. Then you need to install the downloaded software in any convenient place (by default – C: / Program Files / Bitcoin).
When you first start the application, you will need to specify the path to store the blockchain and the file with the user’s wallet. This can be either the default folder or any other. A prerequisite for this is the location in the hard disk partition with at least 250-300 GB of free space (at the time of writing this material). We recommend that you allocate a separate hard drive with a memory of about 500 GB for this.
It is recommended that in addition to the current blockchain size indicated in the application window, at least another 20-30 backup gigabytes of space should be present. This is necessary to ensure the smooth operation of Bitcoin Core in the near future, since the weight of the network is steadily increasing (by about 150 MB every day).
After that, the synchronization of the wallet client with the network will automatically begin. As a rule, this process takes at least several days. It all depends on the speed of the Internet connection, the workload of the computer with various tasks and the time it spent online. Ideally, after the first launch of Bitcoin Core, leave the PC turned on until the synchronization is complete. If, instead, you actively use the computer and periodically disconnect it from the network, the download of the blockchain may take a week or even more.
In case it is impossible to avoid disconnecting the PC from the network, it is important to give the program the opportunity to complete work with already downloaded files in order to avoid errors, because of which it may be necessary to start the whole process from the beginning.
During synchronization, the percentage of progress, the date of the last downloaded block and the estimated time to complete completion will be displayed in the application window. There you can see a warning that due to the incomplete download of transaction history, the wallet balance may not be displayed correctly. For the same reason, you cannot send coins received in a time period whose synchronization has not yet taken place.
After the download is complete, you can start using Bitcoin Core as a Bitcoin wallet and / or node, after making the necessary settings.
Customization Bitcoin Core
All Bitcoin Core parameters available for change are located in the Settings / Options menu:
The main ones – on this tab you can configure the application to start automatically at system startup, change the default database cache, and also use the function to reduce the stored blockchain to a few gigabytes (after complete synchronization, only the last 551 blocks are needed in fact for the wallet to work).
Wallet – there are only two options here that enable the management of coins and the use of inputs that are not yet confirmed in outgoing transactions.
Network – for the normal functioning of the application as a node and synchronization with the network, this section must have a tick in the line “Allow incoming connections”. The remaining settings are optional and can be used in case of problems with access to the Bitcoin blockchain or to increase privacy.
Window – here you can configure the rules for minimizing the application and displaying it in the system tray.
Display – in this tab, you can change the localization of the application through the drop-down menu “User Interface Language”. In the line “Display amounts in units” it is possible to set the display of the balance and transaction details in one of the options: BTC (bitcoin), mBTC (millbitcoin), µBTC (microbitcoin) or satoshi (satoshi). There is also a field for indicating a third-party explorer, so that in the description of transactions in the wallet links are displayed for viewing them through the browser.
All of the above settings and various additional commands for Bitcoin Core can be made through the Console, which is launched by the item of the same name from the “Window” menu. This tool is usually used by advanced users and developers. A complete list of available commands can be viewed through the Help / Command Line Options menu.
Using Bitcoin Core
When you start Bitcoin Core by default, the “Overview” tab always opens, in which you can see the wallet balance (available, in pending transfers and general), as well as a list of recent transactions for sending or receiving funds by the user. A more detailed list of transactions involving the current wallet is available on the “Transactions” tab.
Before you start working with your wallet, it is recommended that you first encrypt it with a strong password. This is done through the menu “Settings / Encrypt wallet”. In this case, it is advisable to pay attention to the warning of the program that if the user forgets the password, then he will forever lose his bitcoins. This combination will need to be entered every time you unlock your wallet and send transactions. Therefore, it is important to keep it in a safe place.
If necessary, the password can be changed through the corresponding item in the “Settings” menu. The remaining stages of interaction with the wallet will be considered in more detail.
Create addresses and receive payments
To create a new BTC address (public key) in Bitcoin Core, you need to use the “Receive” function. In the window that opens, you can specify a name for the new wallet (the “Label” field) so that it is easier to distinguish it from others. It will be visible only to the current user within the application. In the “Quantity” field, you can specify the amount if the address is created to request from someone a payment of a specific size.
Also in the form of generating a new wallet there is an option “Create a native segwit (bench32) address”. If you tick it, the new address can be used in transactions based on SegWit technology. This means that they will be faster and with a cheaper commission compared to using older legacy and p2sh standards.
In the “Message” field you can enter a message for the person to whom the request for payment will be sent. All listed parameters are optional, i.e. using them is optional. The button “Request payment” can be pressed, both with the filled fields, and without them.
After that, a window with a QR code opens, in which the address of the created wallet will be encrypted. If the number of coins was indicated before, when decrypting the QR code, the amount of sending on the side of the potential sender will automatically be set to the number indicated by the recipient.
Also, the new address and related data will be displayed under the QR code in text format and in the form of a URI – a hyperlink that can be opened on other computers with the Bitcoin Core client installed through the File / Open URI … menu.
After creation, all new wallets fall into the “History of payment requests”, where they can be viewed and deleted if necessary. But as soon as a translation is received on any of them, it will immediately disappear from this list. This is done for security, so that Bitcoin Core users use new addresses every time they receive payments. True, you can still view and reuse such wallets through the menu “Window / Addresses for receiving”.
Sending Transactions Via Bitcoin Core
To use the function of sending payments, you need to go to the “Send” tab and fill out the form displayed. The line “Pay” indicates the address of the recipient of the transfer. You can insert it manually or select from a list of previously used ones. The label field is filled with an arbitrary designation, under which the recipient’s address will be further added to the list (available for viewing through the menu “Window / Addresses for Departures”).
In the field “Quantity” the amount of transfer is entered. Next to it there is an option “Subtract commission from the amount.” If you check this box, transaction fees will be deducted from the number of coins sent. Consequently, a slightly reduced amount will reach the recipient. So that the commission does not affect the transferred number of bitcoins, it is not worth ticking. If you click the “Use Available Balance” button, the payment amount will be automatically set according to the number of available coins in the wallet.
The next section in the form of preparing an outgoing transaction is devoted to setting up a commission. Here you can use the option “Recommended value”. In this case, the commission size will be automatically set to the value calculated by the system depending on the current network load and the expected confirmation time (selected in the corresponding drop-down menu).
You can also set the commission per kilobyte of transaction data through the “Custom value” line. At the same time, it is worth paying attention to the fact that setting too low a commission may lead to the inability to successfully confirm the transaction.
The next option, called “Enable Replace-by-fee”, is used to provide the possibility of increasing the commission and speeding up the transaction if it hangs in the mempool.
Also at this stage, you can use the “Add Recipient” button to increase the number of outgoing payment recipients. The fields that appeared in this case are filled in similarly to the steps described above.
On this, the design of the outgoing transaction can be considered completed. It remains only to click “Send” and confirm your intention with the password that encrypted the wallet.
Wallet backup and private key retrieval
You can create a backup copy of your wallet in Bitcoin Core using the function of the same name from the File menu. In this case, the application will ask you to specify the path to save it.
You can also open the Wallets folder located in the directory that the user selected to store the blockchain through any file explorer. There will be located the automatically generated file “wallet.dat”, copying of which will lead to a backup of the wallet, no different from that obtained through the program menu.
It is recommended that you back up as often as possible, preferably after each operation to receive funds and / or create a new BTC address, choosing a reliable medium for storage of the received file, preferably disconnected from the network. Only in this case will it be possible to regain access to your balance after reinstalling the Bitcoin Core application or launching it on another computer. To restore, you will need to place the backup file in the Wallets folder, agreeing to replace the existing one.
Private Key Retrieval
If you use an outdated copy of the wallet, access to all coins received after its creation will be lost. If the user does not have the wallet.dat backup file saved, access to funds will not be restored at all.
When a user needs a private key from any of the addresses created in Bitcoin Core, for example, to import a wallet into another application, you can view it using the “dumpprivkey …” command, which is entered into the console mentioned above. In this case, instead of the “three points”, a BTC address is entered, from which it is necessary to obtain a private key.
For the command to work, you first need to unlock by specifying the password using the command “walletpassphrase pass time” (instead of pass, enter the password, instead of time – the period for which the wallet is unlocked).
Bitcoin Core Cold Storage
To organize a “cold” storage of bitcoins through this application, you need to perform just a few simple steps:
In a fully synchronized wallet, on the “Get” tab, you need to create the necessary number of new addresses and write / print their addresses on paper.
Make several backup copies of the wallet.dat file on different media disconnected from the network.
Delete the original file from the PC with the wallet installed;
Transfer bitcoins to printed addresses.
As a result, the coins will end up on BTC addresses, whose private keys have never been used to access them. As long as this condition persists, we will talk about the “cold” storage of bitcoins. To access these coins, you need to copy the backup wallet.dat to the appropriate folder on the computer with Bitcoin Core installed.
Using Bitcoin Core to Run a Full Bitcoin Node
The main task of a full node is to validate blocks with transactions and then relay them to other nodes. Thus, each running and fully synchronized Bitcoin Core client helps maintain the network’s performance, and its local storage contains an updated copy of the entire Bitcoin blockchain with a complete transaction history.
All that is needed to run the full Bitcoin node is to install the Bitcoin Core application and wait for the entire blockchain to load (described in detail in the section on getting started with the wallet). You also need to make sure that incoming connections are allowed in the network options of the wallet and that TCP port 8333 is open (in the settings of the router and firewall).
For the full operation of the full node, the computer on which it is installed must be online for at least 6 hours daily. All processes in this case are performed by the program independently and do not require any user participation.
Currently, managing a full node has nothing to do with bitcoin mining. Previously, this feature was present in Bitcoin Core, but due to low mining efficiency it was removed from all versions of the application, starting in August 2016. Therefore, all full nodes on Bitcoin Core are now launched exclusively on a volunteer basis (without receiving remuneration) to maintain the network.
Of the 9300 currently active nodes, about 9 thousand are on Bitcoin Core. The remaining 300 are launched through alternative applications like Armory, mSIGNA and Bitcoin Knots.
EOSIO blockchain – it is a decentralized system that runs on its own EOS cryptocurrency and supports decentralized applications (DApps) on its platform. His own EOS tokens are often used for commercial purposes and can be used as a “share” to fund DApp in the EOS ecosystem. Introduced in May 2017 by block.one, EOS does not mean anything specific because its creators never defined it formally. Dan Larimer, founder of Bitshares and Steem, is the CTO of block.one.
Initially, EOS conducted an initial coin offering throughout the year (ICO) in 2017, a total of 200 million (20% of tokens) were distributed over a five-day period, another 700 million (70%) were distributed among the rest of the year and 100 million (10 %) held in escrow for block.one.
The EOS protocol acts like the Google Play Store and the Apple App Store, emulating most of the attributes of a real computer, including hardware (CPU and GPU) for processing, local / RAM and hard drive memory), with computing resources being distributed equally between EOS cryptocurrency holders. EOS also supports the web toolkit used to develop the interface.
Essentially, EOSIO operates as a smart contract platform and decentralized operating system designed to deploy industrial-scale DApp applications through a decentralized autonomous corporation model. The smart contract platform claims to eliminate transaction fees and also conducts millions of transactions per second. EOS (EOS) is software that represents the blockchain architecture, designed to provide vertical and horizontal scaling of decentralized applications. EOS software provides accounts, authentication, databases, asynchronous communications, and application scheduling for multiple CPU cores and / or clusters.
The basis of the EOS token is the EOS.IO software, which provides the blockchain architecture. EOS.IO is designed with horizontal and vertical scaling for decentralized applications. The team created an environment that resembles an operating system and allows developers to create applications on it.
The project blockchain can be scaled to process millions of transactions per second without commission. It also simplifies and speeds up the development of decentralized applications. The team considers its software to be the most powerful infrastructure designed for decentralized applications. They openly declare rivalry with Ethereum.
EOSIO™ Version 2.0: Enhancing Performance and Reducing Barriers to Entry
The release of EOSIO 2.0 included EOS VM, a specialized embedded WebAssembly interpreter and EOSIO Web IDE, which reduces the barriers to entry for EOSIO developers by allowing development directly from a web browser. In addition, we introduced support for WebAuthn, a widespread authentication API built on public key cryptography, and support for multi-signature hardware devices that allow block manufacturers to sign transactions.
EOSIO™ Version 1.8.0: Stable Release of Consensus Protocol Upgrade Features
The release of EOSIO 1.8 introduced the basic mechanisms that are needed to facilitate the activation of updates to the agreed protocol. These mechanisms will allow a majority of two-thirds of the active blockchain block producers of EOSIO to activate functions individually to change protocol rules when updating is completed.