Key metricsKey metrics
CountryCountrySan Francisco, USA

QuarkChain (QKC) Information{coin_name} ({symbol}) Information

QuarkChain is an innovative permissionless blockchain architecture that aims to meet the global-wise commercial standard. It provides a secure, decentralized, and scalable blockchain solution to deliver 100,000+ on-chain TPS. The main features of QuarkChain are 1. Reshardable two-layered blockchains : QuarkChain consists of two layers of blockchains. 2. Guaranteed security by market-driven collaborative mining: To ensure the security of all transactions, a game-theoretic framework is designed for incentives. 3. Anti-centralized horizontal scalability: In any blockchain network with a high TPS, a super-full node can be extremely expensive, which encourages centralization. 4. Efficient cross-shard transactions: Cross-shard transactions in QuarkChain can be issued at any time, and confirmed in minutes. 5. Simple account management: There is only one account needed for the entire blockchains (shards) in QuarkChain. All cryptocurrencies from different shards are stored in one smart wallet. 6. Turing-complete smart contract platform: the QuarkChain network supports Turing-complete smart contracts and has adopted the Ethereum Virtual Machine to allow for easy migration of existing EVM decentralized Apps onto the QuarkChain platform.
Utility of the coin/token
The native digital cryptographically secured utility token of the QuarkChain Network (QKC) is a major component of the ecosystem on the QuarkChain Network, and is designed to be used solely as the primary token on the network. QKC will initially be issued by the Distributor as ERC-20 standard compliant digital tokens on the Ethereum blockchain, and these will be migrated to tokens on the blockchain of the QuarkChain Network when the same is eventually launched. QKC is a non-refundable functional utility token which will be used as unit of exchange between participants on the QuarkChain Network. The goal of introducing QKC is to provide a convenient and secure mode of payment and settlement between participants who interact within the ecosystem on the QuarkChain Network.
Rights of the coin/token holder
QKC carries no rights, express or implied, other than the right to use QKC as a means to enable usage of and interaction with the QuarkChain Network.

Team OverviewTeam Overview

Qi Zhou
Founder & CEO

Former Facebook employee and Googler. Expert in high-performance system and large-scale distributed system. PhD from Georgia Institute of Technology.

Zhaoguang Wang
Head of Engineering

Expert on large scale distributed systems. Worked at Facebook and Google leading projects on real time infrastructure and authentication systems that serve billions of users. MS in Computer Science and Engineering from University of Michigan.

Wencen Wu
Research Scientist

Assistant Professor at San Jose State University. Former Assistant Professor at RPI. PhD from the Georgia Institute of Technology.

Xiaoli Ma
Research Scientist

Professor at Georgia Tech. Fellow of IEEE. PhD from University of Minnesota.

Yaodong Yang
Research Scientist

Professor at Xi’an Jiaotong University, China. An editorial member of Scientific Reports. BS from Zhejiang University and a Ph.D. degree from Virginia Tech.

Anthurine Xiang
Chief Marketing Officer

Finance, consulting and technology background. 6 years of work experience in Wall Street and Silicon Valley. Worked in Argus, LinkedIn, Wish etc.

Sophie Wang
Marketing Director

Worked at Infusionsoft and Lending Club and attracted targeted users through data science. MS in Engineering Management from Duke University. BS from Tongji University.

Questions and AnswersQuestions and Answers

There are so many blockchains these days and they are quite competitive. What plans does QuarkChain have in place to encourage the community to support this project continuously?
We will continue to post our development process, ecosystem building and many more on our social media including Twitter, Telegram, Medium, Steemit, and Reddit. Except for previous 100+ volunteers helping us test our testnet, since our testnet 1.0 has been released, there are more than 3000 community members have joined the testing. We also have developer communities which are under development.
Can you introduce your partners?
We have built strategic partnerships with 30+ global projects such as Tripio, Bodhi, and We also have plans to build deeper relationships with 10 projects including Covalent Chain, DxChain, Drep, Playtable, ValPromise, Ankr, MXC, LendChain, EON, and Celer. Besides, we also partner with Certik in Smart Contract audit. More partnership will be built.
What’s next in the roadmap?
We will introduce our next plans in three major parts. 1)Development The first thing we need to do is to make sure our testnet is stable and keep optimizing our systems. We have found that there are many places, not only in scalability part but also in virtual machine and storage part, that we can improve in the following several months. We are also preparing articles of our technical details for open source several months later. We want to encourage community members to participate in our project and make our project not only our own project but also the community’s project. Another big thing we are focusing on currently is our mainnet which will be launched in several months. The main feature of the mainnet is that we can increase capacity on-demand as the network grows, and it will work as a scalable smart contract that can do whatever ETH can do but with greater scalability. 2)Marketing Currently, we only separate our market into Chinese, English, Korean, Japanese, Russian parts. We will have more strategies to open for different markets including, Thailand, Vietnam, Singapore, India and Europe. We will do more local stuff and enlarge our local community. Moreover, with the launch of testnet, we will build developer communities. At the beginning of August, we are going to hold the biggest hackathon in the Bay Area with Google ABC. There are only three projects to be selected and we are very honored to be one of them. At that time, there will be many programmers from big companies such as Google, Facebook and Linkedin building dApps on top of us on this two-day hackathon. We also have our 50 million eco-fund to establish an open and collaborative ecosystem of QuarkChain and 30 partners after just one month on Binance. 3)Korean Marketing We recently had the signing ceremony with a very strong insurance company in Korea who has revenue of 20 million per year and decides to go blockchain and global. We also have several contracts ready including a leading AI company and leading financial institution in Korea. You will hear more news about Korean marketing very soon.
What kind of language is QuarkChain using for development?
Currently, QuarkChain is developed in Python. The main reason for choosing Python is its fast deployment so that QuarkChain team could focus more on technology. Actually, we already obtain pretty decent performance results these days, and we could easily achieve much higher performance by employing other high-performance languages such as C++ and Go. Note that early Ethereum development also used Python, but later Go implementation becomes popular after Ethereum got more attention.
What does Collaborative Mining of QKC means?
QuarkChain will utilize GPU-friendly mining algorithms, which is still under development. QuarkChain Network has several minor blockchains (shards) and one root blockchain. Each minor blockchain offers different incentives and difficulties. Miners could choose any minor blockchain at an optimal price of their hash power. This creates an open market economic model, where a blockchain is a seller with goods being the block reward, while a miner is a buyer with hash power being their currency. It is desirable that a marketing model is designed with features ensuring that though each party in the market pursues their interests, the collective behaviors of each party can benefit all. The goal of collaborative mining is to design incentive mechanisms and difficulty algorithms so that (1) Hash powers are incentivized to distribute evenly among shards. This ensures that all shards are mined evenly, and thus the system throughput (i.e., TPS) increases as the number of shards increases; (2) The root chain has a significantly large portion (over 50%) of hash power over the whole hash power of the network. This prevents double-spend attacks, and a malicious miner needs at least 50% * 50% = 25% power to perform an attack.
What is QuarkChain’s relationship with DAG or other Tangle technology?
“The tangle is what is known as a directed acyclic graph (DAG): a data structure that moves in one direction without looping back onto itself. ” (from The system of QuarkChain Network itself can be treated as a well-structured DAG. This allows QuarkChain to inherit a lot of benefits from both blockchain and general DAG technique. For example, the consensus of QuarkChain and its threat model can be easily derived/analyzed following those of Bitcoin/Ethereum blockchain, while QuarkChain achieves high throughput similar to general DAG. Given two blockchains/DAGs of QuarkChain, we could easily tell which one should be appended thanks to QuarkChain’s root chain.
How does cross-shard communication work in QuarkChain?
The QuarkChain Network fully supports cross-shard transactions as the first-class citizen, in a sense that: (1) Any user could issue any cross-shard transaction at any time; (2) Cross-shard transactions can be confirmed in minutes; (3) The throughput of cross-shard transactions could be scaled linearly as the number of shards increases. In short, the cross-shard transaction is almost the same as in-shard transaction except that the root chain needs to confirm the block header of the transaction before spending the output of the cross-shard transaction.
It seems there would be different nodes with different roles, all interconnected. How do you plan to prevent them from exploiting the role-playing model? As I understand it, you will manage and audit the network of voluntary nodes, then how do you call it “public blockchain”? Also, sharding doesn’t guarantee the persistence of data, nor completeness of the collection of shards. How do you guarantee longtail operation will be smooth and stable? What if there aren’t enough volunteers to participate?
(1) For the first two questions, nodes (machines) trust each other to form a cluster acting as a full node. Anyone can run their cluster to participate in the network. Thus, we don’t manage clusters directly; (2) For the third question, there will be data completeness for an individual shard. Sharding and persistence are not mutually exclusive and we don’t understand why you think sharding doesn’t guarantee the persistence of data. All major data stored in Amazon, Facebook and Google use sharding to achieve scalability, and we are pretty sure persistence is guaranteed; (3) For the last question, mining is about incentives. We can try to solve the cold start problem by encouraging mining with relative greater incentives at the beginning.
Is that possible to say a dApp to seamlessly run on multiple shards if one shard cannot provide the necessary throughput? If that possible, as cross-shard transactions are slower, wouldn’t that create somewhat of a bottleneck as well?
There is a topic of a scalable smart contract. We are working toward this feature, and a lot of interesting things are ongoing. Also, it depends on how the dApp is configured as well. Take CPU as an example, once Intel/AMD reached the clock speed limit, they realized multi-core should be the next design paradigm, which means performance software should also change the paradigm to fully leverage multi-core CPU architecture.
Number of Nodes — Can you explain to me if the more nodes, the better? Is that possible for QuarkChain to reach high TPS with fewer nodes (to prevent slower network)?
It depends on how these nodes are organized. If all nodes would like to reach the same chain consensus, then the more nodes in the network, the slower the network is. Generally speaking, the more nodes in the network, the more decentralized the network is. Thus, we could achieve the high TPS with fewer nodes, but this will sacrifice decentralization, which is what we want to encourage. This shows the trade-off.


Key metricsKey metrics
Token InformationToken Information
QuarkChain is a token on the ETH platform using the ERC-20 standard. The address of the token contract is 0xea26c4ac16d4a5a106820bc8aee85fd0b7b2b664.

Source Code Repositories

QuarkChain/pyquarkchain 176 Stars 14 Contributers 50 Open Issues

Python implementation of QuarkChain

QuarkChain/crowdsale-whitelist 22 Stars 2 Contributers 1 Open Issues

QuarkChain/quarkchain-web3.js 19 Stars 3 Contributers 4 Open Issues

QuarkChain client library built around web3.js


Tradeable CoinsTradeable Coins
801,649,919 (8% of total) ({tradeable_of_total} of total)

Rich List Addresses holding the largest balances

AddressAddress AmountAmount NameName
0x4f0c97cbc751e33d7b29317308d71beef9fa18f6 4,000,000,000
0x8b4c571dd05ca52d02532143f879d182692fd817 1,275,168,271.33456
0x4e9ce36e442e55ecd9025b9a6e0d88485d628a67 1,014,789,369.54059 Binance 6
0xd624e3ec163851c39486a8f26a1c35c587e68bc1 594,285,875.101
0x030e37ddd7df1b43db172b23916d523f1599c6cb 585,488,355.881688
0xb4c98d633d986226005ba8edef8397bb99897ee1 500,000,000
0x4e23c91674b8a8fb8515cfb0b23d3b1f24d4f91c 368,707,857
0xba826fec90cefdf6706858e5fbafcb27a290fbe0 237,109,350.559847 Upbit 2
0x0298cf0d5b60a0ad885518adcb4c3fc49b36d347 221,115,143.31
0x26e2fa524b85072ed7fb5d5d9237804dc6c0a140 143,152,867
0xce3bb7d5dc86cfbbe3c48384a42d9b39e4ce15f5 88,749,900
0xfeebad75b3be44ba21a59cc073a6aa244182741d 70,000,000
0x4b23854ed531f82dfc9888af54076aec5f92de07 64,664,649
0x3f5ce5fbfe3e9af3971dd833d26ba9b5c936f0be 63,764,463.4442636 Binance 1
0x541e01962bd98edcdc6cc11d85b052387c5dfcbc 51,000,000
0x70e6b4a1a5224387a6746709970b205dcd6887c1 49,161,793
0x7d648c98065502d3a8c6ecf078af8794c7bea798 40,000,000
0x1c4b70a3968436b9a0a9cf5205c787eb81bb558c 23,991,362.6601958 3
0x792c75d1cb133ca49b7ce60ca689e3b77fdf5e56 23,839,201
0x77fa903ee0b5261cf46eff89e8b745b762578a49 20,000,000

Exchange Markets

ExchangeExchange MarketMarket PricePrice DiffDiff Volume 24hVolume 24h SpreadSpread Spread $1kSpread $1k
Binance QKC/BTC $0.0186 -0.84% $2,090,972 0.59% 0.59%
Upbit QKC/KRW $0.0190 1.2% $1,714,413 0.46% 0.46%
Binance QKC/ETH $0.0187 -0.09% $175,544 0.64% 2% QKC/USDT $0.0184 -1.7% $129,359 0.72% 5.5% QKC/ETH $0.0185 -1.3% $3,380.91 1.4% 94%

Latest QuarkChain NewsLatest QuarkChain News

QuarkChain on Twitter

????“QuarkChain and Credits will collaborate globally to drive blockchain adoption and build first-class solutions for the enterprise market” @qc_qizhou…

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QuarkChain on Twitter

QuarkChain scientist Yaodong Yang gave a presentation at the "Next-Generation #Blockchain" event at the Olympic Sports Center in #Beijing. He mentioned that to solve current problems, we need to build a flexible, highly scalable and easy-to-use blockchain underlying architecture.…

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QuarkChain on Twitter

Please vote for $NKN! NKN team is participating in the @HuobiGlobal #FastTrack! All we want to say is @NKN_ORG helps rebuild the decentralized Internet of the future. Wish NKN team all the luck!????…

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QuarkChain on Twitter

On 6/16, Infinity Stones held "#PoS CEO Summit", Junjia, #QuarkChain’s engineer discussed QuarkChain’s in-house #PoSW consensus with the panelists. Click and check what they discussed during the event.

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Qi Zhou on Twitter

Spent the past days to read Libra whitepaper, and excited to see the Libra's universe finally started. It recalls me the time I worked at #Facebook and inspired me the design of @Quark_Chain. Look forward to see how's the future for #Facebook and #Libra.…

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Binance Info on Twitter

Binance Info's V Label project QuarkChain (QKC) @Quark_Chain has updated its Bi-Weekly Report. Read the full report in our News section: … #Binance #quarkchain #Vlabel $QKC…

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QuarkChain on Twitter

Big thanks to Jonathan Shi-CEO of @infstones for hosting #PoS CEO Summit We were proud to join the panel "Stake or Not" and had a great discussion with founders from @CelerNetwork @topnetwork_top @harmonyprotocol #HashFuture…

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QuarkChain on Twitter

AMA Summary: QuarkChain has been holding its bi-weekly AMA (Ask Me Anything) on Telegram/Wechat groups on Saturday. Dr. Zhou @qc_qizhou received lots of questions about the Boson consensus, #sharding technology, smart contract. Find answers here:

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QuarkChain on Twitter

Dear Community Member, #QuarkChain first community governance on “whether to accelerate all delayed token by 6 months” has been successfully concluded. The specific arrangements are as follows:

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QuarkChain on Twitter

Every father is a superhero! #QuarkChain wish every father has a wonderful weekend! #HappyFathersDay2019…

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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.