QuarkChain是基于分片技术的区块链底层技术方案。它具有安全、去中心化、高吞吐能力和可扩展的特性，它将实现每秒十万级链以上的交易处理能力（100,000+ TPS）。

 

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项目亮点

QuarkChain的技术核心包括：

1.可多次分片的双层链结构
QuarkChain由两层区块链结构组成，第一层为分片层（可以理解为子链层），用于交易记账；第二层为一条根链，用于确认分片中的交易。在不影响根链的情况下，分片层的分片数量可以动态增加，从而来提高系统的整体吞吐量。

2.市场驱动的协作挖矿提供安全保障
为了确保交易的安全性，QuarkChain基于博弈论框架设计了一个用于激励矿工工作并合理分配算力的机制，其中至少50%的全网算力将分配到根链上，以防止可能的双花及恶意挖矿等攻击。

3.抗中心化的横向节点扩展
在任何一个具有高的TPS处理能力的区块链网络上，一个保存全网账本的超级节点将是非常昂贵的，这会导致中心化。为了避免这一问题，QuarkChain支持多个廉价的节点组成集群的方式实现一个超级节点的功能，避免了中心化。

4.高效的跨片交易
QuarkChain网络支持在任何时间任何地点进行跨分片交易，并快速完成交易确认。随着分片的数量增加，交易速度将线性增加。

5.简单的账户管理方式
在QuarkChain系统中，每位用户使用整个区块链网络只需要创建一个账户。用户在不同分片上的加密资产将安全的存储在一个智能钱包中，使用体验就如同在单个链上进行交易。

6.图灵完备的智能合约平台
QuarkChain支持图灵完备的智能合约，并采用了以太坊虚拟机（EVM），以便将以太坊上现有的EVM DApp轻松迁移到QuarkChain平台上。

 

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技术亮点

QuarkChain团队打造自己独有的核心多链技术，提出了玻色子共识(Boson Consensus），并且支持以下功能：

一、高灵活性，QuarkChain采用根链——分片结构。根链和分片都可以采用自己的单链共识机制（PoW，PoS, dPoS, BFT等等），并且可以根据业务需求，不断添加；

二、高互操作性，QuarkChain原生支持高效的跨片交易，普通用户不需要了解跨片和片内交易的区别，而不同分片可以具备不同的功能；

三、安全性，我们已经从数学角度证明，所有的跨片和片内交易都能够享受网络的全局安全。
其中，高灵活性也意味者，除了公链领域，玻色子共识能够被广泛的应用在包括联盟链，私有链等等领域。

而QuarkChain作为玻色子共识的首个实现，已经达到了生产级别：

一、主网于2019年4月底上线，到10月份，经历了两次大的升级，一直稳定运行了快6个月。

二、网络统计到的节点数目有50多，70%多的节点都是社群运行。

三、主网无缝支持跨片交易，包括跨片的合约调用（可以使用网页钱包mainnet.quarkchain.io或者手机钱包QPocket随时体验）

四、已经有多家著名交易所支持主网，包括:Upbit、 Gate.io、 KuCoin、 MXC、 Piexgo等。用户可以通过片内或者跨片交易的方式充提币。到现在为止，还没有收到交易所方面汇报的严重问题（比如丢失币，无法加入和同步网络，等等）。

五、Go版本的QuarkChain已经基本开发完毕（现在是提供的是Python开发）并开源。值的注意的是，大部分的区块链项目早期都是只有一个语言开发（比如：比特币用C++、Cosmos用Go、Polkadot用Rust）。

 

QuarkChain is a secure, permission-less, scalable, and decentralized blockchain. One of the goals of QuarkChain is to utilize sharding technology to deliver over 1 million transactions per second (tps). Essentially, QuarkChain markets itself as a peer-to-peer blockchain with a high capacity throughput to help deliver fast and secure decentralized applications. The team behind QuarkChain created this blockchain to resolve the issue of scalability that all the major blockchains are currently facing. The team feels that because of the urgency of this issue, the Bitcoin community simply cannot afford to wait until they all agree on a solution. Instead, they feel that by offering different solutions, such as the one inherent in QuarkChain, this compels the community to split via a hard fork and find the solution that works best. QuarkChain encourages increased decentralization through multiple cheap nodes that then create a cluster that works as a super-full node. This prevents the high expenses associated with super-full nodes when the tps gets high. In terms of protection, all transactions within QuarkChain get the protection of 50 percent of the network’s hash power. This makes a double-spending attack incredibly challenging, particularly when combined with QuarkChain’s decentralized nature. QuarkChain relies on a two-layer blockchain structure. Sharding blockchains known as shards are the first layer, while the second layer is a root blockchain that confirms the shards’ blocks.The major work on QuarkChain began in Q2 2017 with research into the problem of blockchain scalability. In Q4 of that year, the team drafted the whitepaper. In February 2018, it released the white paper and completed verification code 0.1. March 2018 saw the 0.1 versions of both the wallet and testnet. Now in Q2, the team is working on the testnet 1.0 and smart contract 0.1. In Q4 2018, the team will have the QuarkChain Core 1.0, along with the mainnet 1.0 and the SmartWallet 1.0. By Q2 2019, both the SmartWallet and QuarkChain Core will be in their 2.0 versions. QuarkChain is a decentralized blockchain network that aims to resolve the issues of scalability that plague existing networks by using sharding technology. In this way, QuarkChain can dramatically extend the usefulness of blockchain technology since many applications are limited by the scalability of existing blockchain networks. The project is still in progress, but QuarkChain has already made many positive steps and already began invite-based beta testing for the testnet, showing significant progress and potential. The main features of Quarkchain are: 1. Reshardable two-layered blockchain: Quarkchain consists of two layers of blockchains. We apply elastic sharding blockchains (shards) as the first layer, and a root blockchain as the second layer that confirms the blocks from the first layer. The second layer that confirms the blocks from the first layer. The second layer is flexible to be resharded as needed without changing the root layer. 2. Guaranteed security by market-driven collaborative mining: To ensure the security of all transactions, a game-theoretic framework is designed for incentives, where at least 50% of overall hash powers are allocated to the root chain to prevent double spending attack on any transactions. 3. Anti-centralized horizontal scalability: In any blockchain network with a high TPS, a super-full node can be extremely expensive, which encourages centralization. In contrast, QuarkChain allows multiple cheap nodes forming a cluster to replace a super-full node. 4. Efficient cross-shard transactions: Cross-shard transactions in QuarkChain can be issued at any time, and confirmed in minutes. The speed of cross-shard transactions increases linearly as the number of shards increases. 5. Simple account management: There is only one account needed for the entire blockchain (shards) in QuarkChain. All cryptocurrencies from different shards are stored in one smart wallet.