Key metricsKey metrics
PricePrice$2.6585
Asset TypeAsset TypePlatform
StructureStructureFoundation
Project StatusProject StatusWorking Product
OwnershipOwnershipFree
SectorSectorSmart Contracts
IndustryIndustryBlockchain
FoundedFounded16-Mar-2017
Funds raisedFunds raised15.6M
CountryCountryChina
Key personKey personPatrick Dai

Qtum (QTUM) Information{coin_name} ({symbol}) Information

Defining the Blockchain economy

Combining a modified Bitcoin Core infrastructure with an intercompatible version of the Ethereum Virtual Machine (EVM), Qtum merges the reliability of Bitcoin’s unfailing blockchain with the endless possibilities provided by smart contracts. Qtum is an open source Proof of Stake (PoS) blockchain application platform. Qtum’s core technology combines a fork of Bitcoin Core, an Account Abstraction Layer allowing for multiple Virtual Machines including the Ethereum Virtual Machine (EVM) and Proof-of-Stake consensus aimed at tackling industry use cases. Qtum (Quantum) is an open source, decentralized project that aims to capitalize on the success of Bitcoin, while competing for the Decentralized Application (DAPP) and Smart Contract market. The goal is to work with industry partners, and launch the first Value Transfer Protocol (VTP). This will streamline daily business routines, and allow for easier adoption. Qtum aims to become the platform with Smart Contracts that execute as part of an Unspent Transaction Output (UTXO).

OrganizationsOrganizations

QTUM Chain Foundation LTD.

Company NumberCompany Number UEN : 201836477H
100 Tras Street, #16-01 100 AM, Singapore (079027)

Questions and AnswersQuestions and Answers

What is Qtum blockchain?
Our understanding of the Qtum blockchain is to a large extent a decentralized platform and the most influential public blockchain project in the world. But today I hope to bring you a different perspective which is about the advantages of Qtum in the technology development when compard with the public blockchain project on the market. Based on the UTXO model used by Bitcoin, Qtum adopts the consensus mechanism of PoS and is the first public blockchain in the world to make this innovation. We have improved the consensus of PoS and adopted MPoS to avoid damage to the network environment by malicious nodes. At the same time, Qtum designs the AAL (account abstraction layer) so that the UTXO-based blockchain is able to support smart contracts. It is Qtum's innovation and technology upgrade to Bitcoin and Bitcoin's color coin. The DGP chain management protocol that we design and develop into the main chain also greatly reduces the harm caused by the fork and better maintains the decentralization consensus. The mobile client strategy will also make Qtum a bridge between real business and each of us, making each of us to better accept decentralized services.
What are the technical features and parameters of the Qtum blockchain?
• Transaction model: UTXO (Unspent Transaction Output) from bitcoin • Smart contract architecture: EVM (Ethereum Virtual Machine), adding the x86 virtual machine in 2019 • Block size: 2 million bytes, scalable using on-chain DGP (Decentralized Governance Protocol) up to 32 million bytes • Average block spacing: 144 seconds • Smart contract token protocol: QRC20, based on Ethereum ERC20; QRC721 non-fungible tokens in development • Consensus algorithm: Proof of Stake, version 3.0, upgraded from Blackcoin • Theoretical maximum TPS (Transactions Per Second): 70 to 100. Much faster using Lightning Network and other Layer 2 technologies • Block reward: 4.0 QTUM through February 2022 (halved every 4 years), plus a share of transaction fees and gas • Genesis blocks initial creation: 100 million • Maximum supply: 107.8 million in 30 years, current annual inflation 0.87%
What is AAL (Account Abstraction Layer)?
Qtum smart contracts use the Ethereum Virtual Machine (EVM) which was designed to work with an account that holds the wallet’s balance. However, Qtum transactions are based on the bitcoin UTXO model which manages the balance of a wallet as any number of individual transactions. The Account Abstraction Layer interface abstracts all these individual transactions to present a single account balance that allows easier smart contract operation and code reuse from Ethereum smart contracts. The resulting EVM account model is simple for smart contract programmers to use. Operations exist to check the balance of a contract and other contracts on the blockchain. There are operations for sending QTUM to other contracts. Although these operations seem simple, the AAL is fairly complex and enables the addition of new virtual machines, such as the x86 VM.
What is Unita, Qtum Enterprise, QtumX?
Unita, previously known as Qtum Enterprise and QtumX, is a private blockchain for businesses. The Unita blockchain is based on the Qtum Mainnet code modified to use permissioned Proof of Authority consensus (block producers are designated by the blockchain owner). Unita runs very fast with 10-second block spacing.
Does Qtum have masternodes?
Qtum does not have masternodes. Every Qtum Core wallet is a decentralized full node on the Qtum network. Any staking wallet can publish new blocks.
What is the x86 VM?
Intel’s x86 CPU architecture is the dominant CPU platform for servers and desktop computers. The Qtum team is developing a virtual machine using the x86 machine language. A “virtual machine” is an isolated software execution environment that can run on many different hardware platforms (Macs, PCs, servers, virtual private servers in the cloud, etc.). Qtum’s current virtual machine uses EVM and Solidity. Ethereum’s Solidity language was created for smart contract programming. As a brand-new programming language Solidity has some problems. With the x86 VM, a huge population of developers will be able to use familiar languages and tools to write Qtum smart contracts in popular and mature languages like C, C++, Rust, and Python.
How many QTUM are needed to stake? What are the returns for staking?
You can stake with as little as 1.0 QTUM. You will need more coins for a realistic probability of winning a block reward. Block rewards are awarded in a random lottery process. The odds of winning depend on the number of coins in your wallet vs. the total number of coins being staked on the network. The more coins a wallet is staking, the more often it will win a block reward of 4 QTUM. Staking will give block rewards of 5 to 6 percent return per year. To see the expected time to a block reward use the stake calculator. The “Expected Time” to a block reward is an estimate of the average time to a block reward. The “Expected Time” does not count down to zero. There is significant variation in the block rewards which could come earlier or much later than the Expected Time.
What are QRC20 tokens?
QRC20 tokens are derived from the protocol of Ethereum ERC20 tokens. QRC20 tokens are created by Qtum smart contracts as a digital asset for use with DApps. Transactions with QRC20 tokens are made using contract calls and require QTUM for gas fees. Some Qtum wallets have built-in smart contracts templates to easily create QRC20 tokens by simply filling in a form and publishing that contract. See more details in the QRC20 token documentation.
What if my QTUM is still an Ethereum ERC20 token?
Prior to Mainnet launch, QTUM tokens existed temporarily as an Ethereum ERC20 token. These tokens would have an Ethereum “0x” address. Most Qtum holders swapped these tokens for Qtum Mainnet coins, which have a “Q” address, in October 2017. If you still have Qtum ERC20 tokens you may be able to swap them for QTUM coins at gate.io using this procedure but don’t delay.
What is DGP (Decentralized Governance Protocol)?
DGP uses smart contracts to control and update basic blockchain consensus parameters such as block size and gas fee (for smart contract execution). DGP will enable the upgrade of these parameters without the need for a hard fork. DGP does not eliminate hard forks for major new features and functionality.

TechnicalTechnical

Key metricsKey metrics

Source Code Repositories

qtumproject/qtum 1031 Stars 733 Contributers 17 Open Issues

Qtum Core Wallet

EconomicsEconomics

Tradeable CoinsTradeable Coins
95,868,556 (94% of total) ({tradeable_of_total} of total)

Exchange Markets

ExchangeExchange MarketMarket PricePrice DiffDiff Volume 24hVolume 24h SpreadSpread Spread $1kSpread $1k
Binance QTUM/USDT $2.6680 0.36% $886,254 0.19% 0.3%
Upbit QTUM/KRW $2.6391 -0.73% $705,518 0.47% 1.1%
Binance QTUM/BTC $2.6562 -0.09% $609,801 0.44% 0.88%
Poloniex QTUM/USDT $2.6736 0.57% $157,265 0.05% 0.84%
Kraken QTUM/USD $2.6637 0.19% $155,279 0.38% 0.4%
Gate.io QTUM/USDT $2.6700 0.43% $152,393 0.22% 0.63%
CoinOne QTUM/KRW $2.6432 -0.58% $109,010 0.93% 1.2%
Kraken QTUM/EUR $2.6948 1.4% $57,485 0.44% 0.74%
Binance QTUM/ETH $2.6643 0.22% $42,184 0.2% 0.72%
Kraken QTUM/BTC $2.6704 0.45% $34,064 0.31% 0.61%
Bittrex QTUM/BTC $2.6750 0.62% $31,859 0.33% 0.54%
Poloniex QTUM/BTC $2.6816 0.87% $13,571 0.74% 1.2%
Binance QTUM/BNB $2.6720 0.51% $8,693.29 0.66% 1.3%
Gate.io QTUM/ETH $2.6749 0.62% $5,664.84 0.63%
Gate.io QTUM/BTC $2.6562 -0.09% $5,505.14 0.44% 33%
Kraken QTUM/ETH $2.6478 -0.4% $2,189.07 1.1% 1.1%
Kraken QTUM/CAD $2.6628 0.16% $1,015.22 2.8% 5.4%
Poloniex QTUM/ETH $2.6550 -0.13% $909.34 1.9% 8.6%
Gate.io QBT/QTUM $2.6464 -0.46% $816.68 16%
Bittrex QTUM/ETH $2.6317 -1% $790.20 0.62% 1.3%
Gate.io MED/QTUM $2.6460 -0.47% $725.47 61%
Gate.io INK/QTUM $2.6465 -0.45% $0.0000 62%

Latest Qtum NewsLatest Qtum News

QtumOfficial on Twitter

Run a #Qtum node! Play around, have fun, win some qtum? ?? https://t.co/dnxiAWpaUB…

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

Join the hackathon, learn about #Qtum & #Beam, and most importantly, have fun! https://t.co/JCfOx9E0M4

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

We are gearing up for one of our most substantial updates ?? Check out what we've been up to over the past week, here are a few of the highlights: - Testing QIP-5, 6, 7, 9 - Merging bitcoin core 0.18 to qtumcore 0.18 - Merging 0.18 to hard-fork branch https://t.co/gMDy6JiZqZ

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

Crypto Monday’s in #Shanghai are quite fun! #decoding #privacy…

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

A recap of our Q2 development process, past events and new applications that support Qtum! https://t.co/VbICpR8ymi

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

Sweeping across 37 countries — the Qtum & Beam Privacy Hackathon is still on! https://t.co/K213n51Oif

Qtum on Twitter ReadRead 

Binance on Twitter

#Binance Will Support @QtumOfficial ( $QTUM) Staking & Launch a 50,000 QTUM Initial Staking Reward Airdrop https://t.co/gTnBHdDAPY Users holding QTUM on Binance may expect to receive a 1st staking reward bonus from an additional $145,000 equivalent pool of QTUM.… https://t.co/y4uCpUqIbP

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

Take a second to enjoy the #Qtum Weekly Updates. We are building! - Updated the difficulty adjustment algorithm in QIP-9 ?? - Continued work on qx86-rs, the new x86 VM for Qtum ?? - Working on the feerate in C-lightning ? https://t.co/Ag17F6SyVE

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

187 transactions costs only 20 cents with batching on #Qtum! Make sure to join the Introductory Course to Qtum launched by @ic_invictus to LEARN $15 worth of Qtum: https://t.co/epIA3HbkI5 Tx: https://t.co/1VzHZXrb6c

Qtum on Twitter ReadRead 

QtumOfficial on Twitter

You can now take your #Qtum stored on the @exodus_io desktop wallet wherever you go thanks to their new mobile wallet integration! Try out Exodus w/ Qtum for Android and iPhone here ?? https://t.co/Vow9J2J2Hs… https://t.co/a444eZ2ash

Qtum on Twitter ReadRead 
This information is provided AS IS and is not adviceThis information is provided AS IS and is not advice. May contain errors or omissions. Please always do your own research before trading.May contain errors or omissions. Please always do your own research before trading.
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