Popular Smart Contract Platforms

Smart contract platforms now allow anyone to design programmable finance and apply them to a myriad of new use cases. For example, the decentralized finance (DeFi) movement, as well as other decentralized applications (dApps), are all dominated by Ethereum-based smart contracts

One can think of smart contracts as dynamic “if-then” statements. 

And if a developer or company combines enough of them together, they can build never-before-seen tools. The advantages aren’t just in this flexibility, either. Smart contracts eliminate many of the costs of intermediaries traditionally included in the fields of law, finance, supply chains, and much more.

Ethereum now has a host of competitors too. Though the project has enjoyed a first-mover advantage, faster, more advanced blockchain projects have emerged to try taking the throne. 

In the following Guide, Crypto Briefing outlines the top smart contract platforms and offers readers a broad overview of the smart contract space. 

Ethereum

Founder: Vitalik Buterin

Date of creation: Launched in July 2015.

Asset: ETH

One-liner: The first smart contract platform, and still the biggest in terms of developer activity.

Ethereum was the first blockchain to be developed with a Turing-complete scripting language, Solidity. It was the brainchild of programmer Vitalik Buterin, who recognized the vast potential of blockchain technology through his early engagement with Bitcoin. However, after failing to convince Bitcoin core developers that the platform needed application development functionality, he wrote the white paper for Ethereum. 

The founding team comprises Buterin, Anthony Di Iorio, Charles Hoskinson, Mihai Alisie, Amir Chetrit, Gavin Wood, Joseph Lubin, and Jeffrey Wilke. Several of these members have since left Ethereum to work on their own projects. 

Ethereum is the current leader of smart contract space and provided a blueprint for many of its successors. It was the first blockchain to gain any significant traction with enterprise adoption, thanks in part to the formation of the Enterprise Ethereum Alliance, which boasts members including Samsung, Intel, and JP Morgan. 

Ethereum is also the central hub of the decentralized finance movement, home to some of crypto’s biggest dApps, including Maker and Compound

Over the years, Ethereum has weathered several significant events, the most notable of which is The DAO incident in 2016, where a hacker exploited a vulnerability in a smart contract and stole $50 million worth of ETH. 

The fallout from the incident resulted in a divide in the Ethereum community, with one side supporting a rollback of the blockchain to reclaim the funds, and the other side declaring that “code is law.” A controversial hard fork ensued, resulting in the formation of the Ethereum Classic blockchain. 

The biggest challenge facing Ethereum, however, has been its lack of scalability. Despite being one of the most-used blockchains, it frequently suffers from network congestion. Perhaps due to a highly decentralized approach to core development, upgrades are slow to arrive and often beset by delays. 

The current upgrade, dubbed ETH 2.0, has been slated for the first phase of implementation in July 2020. 

The native token of the platform is ether (ETH), which is the second-biggest cryptocurrency by market cap. Ether is also used to pay the gas fees required for transactions on the platform. 

RSK

Founder: Diego Gutiérrez Zaldívar (now CEO of IOV Labs), Sergio Lerner, Gabriel Kurman, Adrian Eidelman, and Ruben Altman

Date of creation: RSK was founded in 2016 and launched in 2018.

Asset: RBTCRIF

One-liner: Smart contract platform running as a sidechain of the Bitcoin blockchain.

RSK operates as a sidechain of the Bitcoin blockchain and is merge-mined with Bitcoin. It was developed to bring Ethereum-like smart contract functionality to the Bitcoin network. 

Diego Gutierrez Zaldivar, CEO and founder, describes the RSK vision to Crypto Briefing as: 

“We developed RSK to add value and expand functionality to the Bitcoin ecosystem by providing smart contracts functionality and greater scalability, establishing the layer needed for Bitcoin to  become the financial system of the future.”

The RBTC token is pegged 1:1 with Bitcoin and is the native token of the RSK platform, used to pay for the gas to execute transactions. 

RSK now operates as part of a technology stack with the Bitcoin network as a base layer. The RSK Infrastructure Framework (RIF) layer runs on top of RSK, providing a marketplace of developer tools. These include storage, payments, and a naming service. 

RSK hasn’t gained the same traction as Ethereum in the North American and European markets. However, it does have a far bigger footprint in its native Latin America. 

The company that operates RSK, IOV Labs, last year acquired Taringa, the biggest social network in Latin America with over 30 million users. It’s also the platform of choice for Money on Chain, which operates the Dollar on Chain stablecoin and has recently expanded into offering stablecoins collateralized by the RIF token. https://platform.twitter.com/embed/Tweet.html?creatorScreenName=https%3A%2F%2Ftwitter.com%2FLiam_Gallas&dnt=true&embedId=twitter-widget-0&features=eyJ0ZndfZXhwZXJpbWVudHNfY29va2llX2V4cGlyYXRpb24iOnsiYnVja2V0IjoxMjA5NjAwLCJ2ZXJzaW9uIjpudWxsfSwidGZ3X2hvcml6b25fdHdlZXRfZW1iZWRfOTU1NSI6eyJidWNrZXQiOiJodGUiLCJ2ZXJzaW9uIjpudWxsfX0%3D&frame=false&hideCard=false&hideThread=false&id=1247327791726710788&lang=en&origin=https%3A%2F%2Fcryptobriefing.com%2Fwhos-afraid-ethereum-top-12-smart-contract-platforms%2F&sessionId=3a46b40fa92812b9c3c9b588bdbf2745b70d160c&siteScreenName=crypto_briefing&theme=light&widgetsVersion=ff2e7cf%3A1618526400629&width=500px

RSK can scale up to around 400 transactions per second. However, some of the tools available on the RIF layer can run even faster. For example, the Lumino payments protocol can handle up to 5,000 transactions per second. 

The RBTC token is merge-mined with Bitcoin, and the RSK network has previously managed to gather around 45% of the Bitcoin network hashrate, making it highly secure compared to many other platforms dependent on a smaller number of miners or nodes. 

Ardor

Founders: Lior Yaffe, Kristina Kalcheva

Date of creation: Launched on mainnet in January 2018.

Asset: ARDR

One-liner: “Parent-and-child chain” architecture with lightweight smart contract capabilities and no blockchain bloat.

Ardor is operated by Jelurida and has its roots in the Nxt blockchain, which was one of the first PoS networks and has been running since 2013. Ardor was created by the same team to overcome the adoption challenges of traditional linear blockchain architecture. 

These include the use of a single token, a lack of customization capability, and blockchain bloating as a result of processing and storing every single transaction in the same way. 

Ardor aims to overcome this with an architecture that comprises the main parent chain and child chains. Each child chain is entirely customizable according to user requirements and can use its own token. Ardor also makes use of stateless, lightweight smart contracts programmed in Java. 

Lior Yaffe, Core Developer and Co-Founder of Ardor, explains the lightweight smart contracts as follows:

“The contract code itself is a simple Java class uploaded to the blockchain and therefore digitally signed and time stamped. However, the execution of the contract is only performed by nodes who choose to run the Contract Runner addon. This removes the need for ‘metered’ execution using the gas model and removes the risk of systematic failure in case the contract malfunctions.”

He adds:

“Furthermore, this enables contracts to work as oracles, to freely integrate with external systems and thus removes the need for a separate layer of oracles.”

The first and main child chain of Ardor is Ignis, which offers unique features and functions across other child chains operating on the Ardor network. These include asset issuance and user account configuration. Ignis also provides various on-chain features, including a voting system, exchange, and data cloud. 

Ardor and Ignis each operate their own tokens, under the tickers ARDR and IGNIS, respectively. 

Applications running on Ardor include augmented reality game Triffic, art-focused DAO Tarasca, and real estate management platform Dominium

Matic Network 

Founders: Jaynti Kanani, Sandeep Nailwal, Anurag Arjun

Date of creation: 2018, mainnet launched in 2020.

Asset: MATIC

One-liner: Plasma and PoS side chains create a scalable layer 2 for the Ethereum network.

Matic Network is a layer 2 scaling solution that utilizes sidechains for off-chain computation. T

he network is secured through an adapted version of the Plasma framework and a decentralized network of Proof-of-Stake (PoS) validators. 

Jaynti Kanani, a co-founder of Matic, describes the vision of the project as follows: 

“Matic aims to overcome the scalability and usability-related problems of the blockchain space by leveraging a combination of blockchain scaling, developer platform and tools, and a keen focus on user experience. We believe the answer to enabling widespread adoption of blockchain technology lies with second-layer solutions focused on scalability. Thus, Matic Network provides massive scaling capabilities whilst leveraging the security and decentralization of the Ethereum mainchain.”

Matic Network achieves significant scalability, with a throughput of 65,000 transactions per second without compromising on decentralization. 

The project achieved early recognition from some of the biggest names in crypto, with both Coinbase Venture and Binance Labs providing financial backing. 

Before launching its mainnet on Jun. 3, 2020, Matic had already attracted more than 50 dApps, making it the most adopted layer 2 platform in the space. dApps on Matic encompass a variety of niches ranging from gaming to DeFi, with notable projects including Decentraland and whitelabel betting platform BetProtocol.

The network’s token, MATIC, is used in a similar way to Ethereum to pay gas fees for transactions. 

Telos

Whitepaper author: Douglas Horn (now founder of block producer, GoodBlock).

Date of creation: The Telos Mainnet was launched on Dec. 12, 2018, by the Telos Launch Group.

Asset: TLOS

One-liner: Telos is a dPoS blockchain based on EOSIO software with a focus on governance.

The Telos network was created to combine flexible governance and high transaction speeds using EOSIO software. Telos never held an ICO and has been a community-driven bootstrapped project since inception.

With a network capable of handling 8,000 transactions per second, the Telos platform attracted gaming apps Angry Warlords and BLOX to its platform. 

With governance credentials that rival those of Tezos, Telos has also attracted several dApps for social good in its first year. Sesacash allows cross-currency conversions in Africa. Seeds is an experiment in regenerative money that incentivizes people to behave in environmentally-friendly ways. And, finally, Murmur, a blockchain-based social network, recently switched from EOS to Telos to take advantage of lower-cost transactions.

Telos lacks the profile of some of the other top smart contract platforms, but its feature-rich network and commitment to governance could give it an edge over the long run. 

The network aligns itself with what it sees as a future economy built on interconnected smart contracts governed by its users. In the words of whitepaper author Douglas Horn:

“The dApps coming to Telos or emerging from our own Telos Works incubator are leveraging the massive speed and capacity, functional governance, and unique tools available to any dApp on Telos, like the Telos Decide governance engine. A significant portion of developers has also expressed to us that the ethos of Telos as a truly decentralized, egalitarian, and forward-thinking platform that has managed to build itself and foster other projects without an ICO or centralized ownership is an important area of alignment with their own aims.”

EOS

Founder: Dan Larimer, (now CTO of Block.one)

Date of creation: EOS was launched in January 2018.

Token: EOS

One-liner: EOS is a dPoS blockchain based on EOSIO software. It is also a top smart contract platform.

The EOS blockchain protocol is powered by the EOS token, which has consistently ranked in the top ten in terms of market cap since its launch in January 2018. Fueled by a record-setting $4 billion ICO, the EOS network emulates computing resources, including CPU, GPU, and RAM, all of which are supported by EOS token holders.

Larimer developed the delegated Proof-of-Stake (dPoS) consensus mechanism, whereby EOS token holders vote 21 block producers (BPs) to operate the network, with standby contenders on notice to assist if required.

Adrianna Mendez of Cypherglass, a founding EOS block producer and paid stand by BP, told Crypto Briefing that:

“EOS continues to showcase the potential of delegated proof of stake. Two years after its launch, it’s the most used and fastest-growing blockchain in the world. The possibilities for developers are endless.” 

Delegated PoS offers speed and scalability advantages over pure PoS consensus mechanisms. Games and gambling apps dominate the top 20 apps on EOS, although a decentralized exchange, Newdex, boasts daily volumes around $15 million.

Block.one, the company behind the network, also operates a venture capital arm and launched a beta version of Voice in early 2019, a social media network poised to rival Facebook.

Algorand 

Founder: Silvio Micali

Date of creation: Mainnet launched Jun. 5, 2019.

Token: ALGO

One-liner: Algorand aims to build a “trusted, public, and permissionless  infrastructure for the borderless economy.”

The Algorand network is operated by a pure proof-of-stake consensus mechanism with a transaction throughput rivaling large finance and payment networks. It is scalable to manage billions of users. It claims to be the world’s first blockchain to “provide immediate transaction finality without the fear of forks.”

The Singapore-based project attracted $4M in seed funding from Pillar and Union Square Ventures in early 2018. It then landed a second $64 million raise from a broad slate of investors that October. 

Upon Coinbase’s listing of ALGO in 2019, the platform’s native token was argued to be one of the fastest cryptocurrencies on the exchange. 

Steve Kokinos, CEO of Algorand Inc., told Crypto Briefing that:

“Smart contracts need to be scalable and secure. At Algorand we’ve developed smart contracts built directly into Layer-1 to operate securely without compromising scalability or security while maintaining low execution cost. By focusing on simplifying developer experiences, Algorand enables real-world use cases like cross-chain atomic transfers and regulated disbursements with rapid confirmation time and immediate finality. These use cases are made possible by our pure proof-of-stake protocol, which was designed from the ground-up to deliver a secure, scalable, and decentralized platform necessary for mainstream adoption of blockchain technology.”

Early in 2020, Tether launched an Algorand version of its stablecoin on the platform, “representing the first significant use of Aglorand’s Standard Asset (ASA) specification.” 

Other significant partnerships include one with World Chess, which intends to conduct a hybrid IPO and STO alongside a listing on the London Stock Exchange. AssetBlock also launched a real estate investment platform on the network in 2019, cementing Algorand’s reputation as a reliable partner for innovative corporate initiatives.

The high-profile smart contract platform has attracted RHOVIT, a gamified content platform, Meld Gold, an Australia-based tokenized golf asset trading network, and the tokenized investment platform, Republic.   

Tezos

Founders: Kathleen & Arthur Breitman

Date of creation: Mainnet launched Sep. 17, 2018.

Token: XTZ

One-liner: Tezos is the innovative brainchild of the Breitmans who wanted to create a self-amending cryptographic ledger.

The Tezos Foundation began the Tezos project with a lucrative ICO in 2017, raising some $232 million for the Swiss-based non-profit. It soon became embroiled in controversy, with a dispute between the Breitmans, who owned the IP, and Johann Gevers, the foundation’s president and the one in control of the project’s funds.

The resultant delayed launch saw investors sue the project as confidence faded. Intended as a network that boasted unrivaled governance processes, internal governance itself had become an issue.

Despite its tumultuous start, the network was finally launched in 2018. Its governance processes were indeed innovative. With decision-making processes baked into the system, protocol upgrades proposed by developers are approved by stakeholders. Once approved, the developer is paid.

The process incentivizes decentralized development and improvements. The on-chain governance properties of the network extend to its Proof of Stake mechanism, with token stakers known as bakers earning rewards for securing the network. 

As Alison Mangiero, president and co-founder of TQ Tezos told Crypto Briefing:

“In Tezos, we already see widespread participation because unlike in proof of work and other stake networks, all stakeholders can help to secure the network (via baking or delegating), and avoid being diluted by inflation (of course all stakeholders can also participate in network upgrades by evaluating, proposing, or approving amendments to the protocol itself).”

Its protocol also allows Bitcoin and Ethereum to be represented on the network. As the whitepaper states, “Tezos can instantiate any blockchain-based ledger.” 

 From a hyped ICO to legal dramas and finally, a blockchain network lauded for its innovation and governance properties, Tezos has become one of the top smart contract platforms in the industry.

AVA Labs

Founders: Emin Gün Sirer, Kevin Sekniqi, Maofan Ted Yin

Date of Creation: 2018, still in the testnet phase. Planned to launch mainnet this summer (July).

Asset: AVA

One-liner: A more malleable version of Ethereum that allows users total control at all stacks of the technology. 

Another top smart contract’s platform, the AVA blockchain and its creators, AVA LAbs, have attracted top investors from throughout the crypto space. Like many of the “Ethereum Killers,” founders of the project are aiming Ethereum’s significant flaws. These flaws have primarily been user control over the production process and scalability. 

In an interview with the co-founder of AVA Labs, Kevin Sekniqi told Crypto Briefing that AVA offers users three tiers of control. “First, there’s the network layer, the middle layer, which would be the actual blockchain or virtual machine, and then there’s the application layer,” he said. He added:

“AVA will support multiple smart contract languages and formats, but at launch it has complete support for the Ethereum Virtual Machine, and all of the tools that have fueled DeFi’s growth to-date, including MetaMask, Web3.js, MyEtherWallet, Remix, Truffle Suite, and more.”

Such customizability allows builders to take control of all dimensions of development. It also offers programmers and entrepreneurs new avenues of exploration. 

Top Smart Contract Platforms: Comparison of Throughput per Blockchain
Source: AVA Labs

Any novel experiments on this top smart contract platform would be scalable from day one too. That’s because AVA is leveraging a novel consensus mechanism called Avalanche. 

Designed in 2018, Avalanche boasts an estimated 4,500 transactions per second, making it one of the most scalable blockchains in the ecosystem. 

Unfortunately, the project lacks the same community as Etheruem and other more established crypto projects. This dynamic is not unusual; Ethereum has long been the most attractive platform for builders. This activity can be seen in the sheer number of projects that spring up almost every week. 

Ethereum’s dominance hasn’t deterred Sekniqi, however. He said: 

“On our testnet we have more than 700 full block producers actively staking and participating in the consensus protocol. These are full nodes, the highest-level of participants in the system. Further, since launching AVA-X, our accelerator for developers, in April, we’ve fielded hundreds of grant applications and awarded grants for projects like an end-to-end testing suite, atomic swaps, payments and remittances, and infrastructure.”

Further, the backing from names like Andressen Horowitz, Polychain and other VC firms, could see some developers leave Ethereum for newer horizons. AVA Labs is making this transition easier, too, by building a friendly-fork of Ethereum on AVA called “Athereum.” 

The fork would resemble many of the features of Ethereum 2.0 but is unlikely to replace efforts towards an improved Ethereum. Like many of the projects on this list, AVA’s viability hinges on reaching a critical mass of developers before ETH 2.0 is launched. 

Fortunately, it appears AVA Labs still have some time to make this happen. At the time of press, the first of four phases will be rolled out in 2021, according to ConsenSys.

Cardano 

Founder: Charles Hoskinson

Date of Creation: 2017

Asset: ADA

One-liner: A multi-tiered blockchain project building out a PoS consensus mechanism capable of hosting smart contracts, dApps, as well as offering users a store of value. The smart contract platform is slated to launch later in 2020.

Charles Hoskinson is one of the founders of Ethereum. In 2014, shortly before the network launched, he left due to disagreements with how the project was structured. Instead of being a fully open source project, Hoskinson was interested in seeking venture capital and creating a for-profit company using the technology. 

He then helped found IOHK, Input Output Hong Kong, a company that brought together various academics and engineers to build enterprise-grade blockchains. The targeted clients included government entities and large corporations. They attracted such customers and ultimately began focusing on Cardano in 2015 as a product of the group’s research. 

Built using a coding language called Haskell, Cardano embraces the Proof of Stake PoS) consensus mechanism “because it adds a mechanism to introduce secure voting, has more capacity to scale, and permits more exotic incentive schemes.”

Cardano has technically been in the wild since 2017 via the launch of its first iteration called Byron. This “era,” as the team calls it, ushered in the Daedalus wallet for desktop and a light client called Emurgo. The network is currently transitioning into its next era called Shelley

Shelley will bring about Cardano’s PoS mechanism and lay the foundation for implementing smart contracts, according to the project. Cardano’s smart contracts will be written in another language called Plutus, which is available for review here

Aparna Jue, Cardano’s product director, told Crypto Briefing that:

“Haskell is recognized not only at a developer level but at an academic level too, due to its mixture of academic and industry-grade talent with credentials in computer science. This means that our smart contracts will be safer and more reliable than smart contracts on other languages, as Plutus has been thoroughly tested and documented to ensure it is of the utmost security. Smart contracts on the Cardano blockchain will also allow for every party to have full visibility of the contract’s exact details, whilst making it virtually impossible for any individual to act in an adverse way.”

It should be noted, however, that Cardano developments have been slow to materialize with the team, often delaying many of its deadlines. For now, there is limited information available regarding the release of Plutus and the Cardano-based smart contract platform. Jue added:

“We are currently putting together a roadmap of features and functionality that will be released in a controlled rollout manner for the developer community to test and provide feedback, as product development refines and iterates, come Q3/Q4. More details will be released when available.

Cosmos

Founders: Jae Kwon and Ethan Buchman

Date of Creation: 2016

Asset: ATOM

One-liner: Cosmos is a far-reaching project that seeks to add a communication layer between various blockchains. Although it’s primary focus is interoperability, it also enjoys robust smart contract functionality. 

Cosmos is a set of blockchain-based tools that have been developed to help engineers build scalable blockchains. The advantage over Ethereum is in Cosmos’ improved customizability and ease. Instead of having to build all layers of a network from scratch, engineers need only focus on the application layer. 

Examining the three primary Cosmos tools will help clarify this process. Before Cosmos launched, Jae Kwon developed Tendermint BFT. It bundles the networking and consensus layer into one single platform. This means that builders needn’t reinvent the wheel and can, instead, focus on building their blockchain project. 

ABCI is a socket that allows developers to work in whichever programming language they are most comfortable with.

Top Smart Contract Platforms: Cosmos SDK Diagram
Source: Cosmos

As with many next-generation technologies, Cosmos is faster and more secure than many of its predecessors. It can handle thousands of transactions per second and boasts instant finality. 

The team behind Cosmos has also built the Cosmos SDK and the Interblockchain Communication Protocol (IBC). 

The SDK is a framework that offers engineers an easy way to manage staking, scaling, and interoperability functions. This framework isn’t exclusive to Cosmos, either. Any consensus mechanism that includes the ABCI socket can also tap the Cosmos SDK.

Finally, the IBC allows this collection of tools to interact with any other network, including Bitcoin and Ethereum. To make the transition for Ethereum developers easier, the Cosmos team has also built Ethermint. It offers many of the same tools and features as Ethereum but is built on Tendermint. 

For those building smart contracts with Cosmos, there are many differences. Sam Hart, a member of the Interchain GmbH, told Crypto Briefing: 

Inter Blockchain Communication and Agoric’s smart contract architecture both use an ‘object capability’ model, which defines the way a contract, address, or anything else can interact with each other. These capabilities are to be defined explicitly, meaning developers must elect to give an entity in the system particular privileges, for instance moving money around, changing the membership of a group, etc. This model follows a ‘principle of least authority,’ which is the inverse of how most smart contracts are written, where access is granted by default. The result is far greater encapsulation, both from the standpoint of program logic and security —meaning that programs written in this paradigm should be far more composable and securely reusable.”

As one can see, Cosmos is rallying together a large community of developers to create a TCP/IP-like network of blockchains.

The interoperable parts could include networks like Bitcoin as well as more modern iterations down the line. In terms of its smart contract functionality, it offers the same experience as Etheruem while also improving flexibility. 

Agoric

Founders: Mark S. Miller, Brian Warner, Bill Tulloh, and Dean Tribble

Date of Creation: 2018, mainnet TBA.

Asset: N/A

One-liner: Agoric is backed by highly-experienced engineers who helped work on some of the very first smart contracts long before blockchain technology existed. 

Like many of the competitors found in this guide, Agoric is building improvements that Ethereum failed to adopt. Founder Dean Tribble told Crypto Briefing: 

“We love Ethereum, which has had enormous success in combining the power of smart contracts with the integrity of blockchain execution. However, some of its strengths for early growth are real issues for large-scale, mainstream adoption, in particular with security: we believe existing security models don’t satisfactorily prevent theft of data or money.“

Agoric plans to solve this security issue by making the programming language as easy to deploy and audit as possible. 

This is where the team’s rich experience with one of the world’s most popular programming languages, Javascript, comes in handy. This approach offers composability between modules and, thanks to an integration with Tendermint, interoperability between blockchains. 

The project’s current iteration, called Zoe, offers yet another degree of safety. This framework helps users and developers ensure that they are receiving the goods or services they paid for when interacting with a smart contract. It is like a waiting room for blockchain transactions. Users send their “offer” for a specified transaction to this waiting room. Only once the conditions of this transaction are met, do the funds get released. 

Concluding, Agoric’s value proposition is that the top smart contract platforms should be easy to build for most developers. After that, developments are focused on maintaining security throughout a contract’s operations. 

A Final Word on the Top Smart Contract Platforms

Smart contracts are one of the more exciting fields within the blockchain ecosystem. And although Etheruem currently dominates developer activity, this may change in the future. 

As this list has shown, many projects are looking to attract programmers to faster and more secure networks. 

Like any business, however, users are the ones who will enjoy the fruits of this competition.

By Liam Kelly, Sarah Rothrie, Paul de Havilland

以太坊与以太坊经典的区别

很多人都把以太坊Ethereum (ETH)、以太坊经典Ethereum Classic(ETC)混淆,不仅以太坊经典的名字与以太坊相似,而且这两种数字货币在功能上相似的地方也不少。很多人对以太坊经典抱有不小的期待,认为以太坊经典有追赶以太坊的势头。那么,以太坊经典和以太坊有什么联系和区别呢?下面跟随小编一起来好好看看以太坊经典和以太坊的不同点:

以太坊经典和以太坊的前世今生

以太坊是一个分布式的智能合约和分布式自主应用程序DApps平台,目标是成为全球唯一的超级计算机。该网络使用加密货币以太币(ETH),用于构建执行智能合约和DApps平台,不受审查、停机、第三方干预因素干扰。

与以太坊类似,以太坊经典也是去中心化、可编程的区块链平台,具有开源、公开特点的智能合约平台。

以太坊经典和以太坊的相同点

ETC和ETH是在区块高度1,920,000时分叉的。分叉之后,这两者从技术角度上几乎是相互兼容的。在以太坊上面部署的智能合约绝大部分都同样能够部署在以太经典上。Truffle和Zeppelin等开发工具也是通用的。

以太坊经典和以太坊的不同点

ETH决定通过“回滚”的方式获得支持,相当一部分的矿工、用户和老版本的以太坊协议都迁移到了这条新链上。

ETC坚决秉承去中心化、不可篡改的区块链核心原则,在ETC区块链上任何交易都会如约执行,不为第三方权威机构所左右。

ETC的大发行量在2.1 – 2.3亿个之间。而ETH目前还没有设定大发行量(这个发行量可以随时改变)。

以太坊正在从POW工作量证明转向POS权益证明,而以太经典仍然坚持去中心化的POW工作量证明。

ETH目前市值为2700亿美元,而ETC市值仅为47亿美元。

关于区块链的可变性

ETH——假如大部分人同意修改链条(也就是可变性),那么就可以修改区块链记录和合约

ETC——区块链记录和合约不可修改(也就是不可篡改性)

下面是关于两种方法的利弊

可变性的好处是人们可以适时地改变以做出正确的决定。因此,修改规范比找漏洞更实用。

不可修改性是人们不管当时有多聪明,但也不可能会不出错。因此,应对此方案出现问题的时候,最好是通过现有的法律框架来寻找和解决漏洞。

关于发展的不同

ETH——不管是有意安排或者从诞生就如此,区块链核心决策都是在社区的参与下由以太坊基金会制定并大部分由它开发。

ETC——区块链的决策主要是通过三个松散的、有协作关系的团队在社区参与下得到反馈而决定的。

在任何情况下,任何人都可以为两种区块链提出改进建议。这正是开源之好处,也是很常见的。你会发现,这两条链的开发人员通过Github和Reddit来相互沟通。我希望为了实现共同目标,提高沟通和交流的频率。

关于兼容性

目前,这两种区块链都相互兼容。ETH写的合约(或应用程序)可以在ETC上应用,反之亦然。

ETH——专注于eWASM,致力于为越来越多的开发者提供平台。而对于合约安全性的问题是次要的(例如:Viper)

ETC——专注于让开发者创造出更安全的合约(例如:Viper,IOHK研究),代价是消耗潜在的开发者人数。

很明显,这两条链都可以互相接纳。不管它们的意愿是否相同。我的看法是,开发人员的数量并不一定与产品的质量挂钩。

关于交易速度

ETH——平均25秒。升级之后会缩短。

ETC——平均14秒。升级之后维持在10-14秒(根据ECIP-1010 和 ECIP-1036协议)

关于区块容量

ETH——随着ETH日交易量逐渐达到5百万,区块容量日渐饱和,这种情况跟最近比特币的交易费用问题类似,这个问题可以通过对区块扩容得到解决(通过增加默认的燃料限制)

ETC­——目前区块容量还有很大空间。随着越来越多的人接受ETC,区块容量也会随着增加,跟ETH一样。

关于货币政策

ETH——计划供应稳步增长,导致ETH区块链在生命周期里平均有3%的通货膨胀。

ETC——2025年之前,通货膨胀达到3%,届时总供应量将达到2亿ETC。之后会通货紧缩。

关于证券

ETH——目前投资者没有交易证券的选择权。最近ETH的一个ETF(交易型开放式指数基金)产品被监管层否定了。

ETC——拥有ETC交易信托基金,该基金允许投资者拥有ETC,而不用拥有这个资产本身。

2020年6 月 1 日,以太经典网络成功实施了 Phoenix 硬分叉,通过此次硬分叉升级,ETC 和 ETH 在技术上保持完全一致。

即便如此 ETC 还是和 ETH 在某些点上有所区别,我们今天要说的一点是 ETC 的货币政策。

以太坊经典货币政策

以太坊经典(ETC)的货币政策寻求与比特币类似的目标。但是,ETC 的模型并不是那么简单,因为 ETC 添加了智能合约功能。这意味着它包含一个 EVM,一种编程语言,一个 gas 系统以及每约 15 秒钟而不是 10 分钟更快地创建一个块。

由于上述原因,我们最好分 8 个部分解释以太坊经典的货币政策:

1. 预挖

ETC 的不同之处在于,为了推出以太坊,其创始人进行了约 6000 万美元的预售(ETC 当时与 ETH 同链),以资助 2014 年到 2015 年之间约一年半的开发和发布阶段。开发人员还发放了约 1200 万 ETC,以奖励创始人,团队中的其他合作者以及一些局外人。

总而言之,在 2015 年 7 月 30 日(任何采矿之前)的创世区块的发行总额为 72,009,990ETC。该总数通常称为“ 预挖”

2. 时代

在 The DAO 事件发生前(ETC 和 ETH 还是统一的链),ETC 没有发行上限,但是在 2017 年 12 月 11 日,以太坊经典生态系统对网络进行了升级。

这建立了一个新的确定性的货币政策,每 500 万个区块有一个上限和一个“时代”系统。假设出块时间为 15 秒,这些时代的持续时间大约为 2.38 年。

时代描述如下:

时代 1:

前 5,000,000 个区块是根据原始货币政策制定的,其中包括奖励矿工每区块 5 ETC 的区块奖励,4.30375 ETC 的叔块奖励以及鼓励 0.15625 ETC 最多 2 个叔块的奖励。

在这种情况下,单个块将获得 5 个 ETC,如果包括 2 个叔叔块的限制,则将支付额外的(0.15625 + 4.375) x 2 = 9.0625,总计 14.0625ETC。

这个第一个纪元于 2017 年 12 月 11 日结束,ETC 发行总量为 98,491,770,其中包括预开采的 72,009,990,区块奖励的 25,000,000 和叔叔区块的奖励 1,481,780。

在此期间,平均年化通胀率为 14.08%。

时代 2:

第二个 5,000,000 区块将在 2020 年 3 月 15 日左右以 10,000,000 号区块结束。第二个时代将大块奖励从 5 个 ETC 更改为 4 个,而大叔块奖励和大块矿工奖励分别设置为 0.125 的相同水平。

上面的意思是,单块开采的区块获得 4 ETC,并且当添加 2 个叔块的限制时,奖励增加了(0.125 + 0.125) x 2 = 0.50,总计 4.50ETC。

到这个时代结束时,根据 5.4% 的叔块出块率,估计将有 118,559,270 ETC 的存量,其中包括上一个时代结束时的 98,491,770,再加上 2000 万的区块奖励,再加上 67,500 的叔叔块奖励。

该时代的年平均通货膨胀率估计约为 8.12%。

时代 3+:

从第 3 时代开始,所有的区块奖励将减少 20%。也就是说,从区块 10,000,001 开始,新的区块奖励将是 3.20 ETC,在下一个时代开始于区块 15,000,001,它将是 2.56 ETC,依此类推。

包括叔块奖励在内的激励将获得相同的折扣,每个块最大限制为 2 个叔叔。

以太坊经典与以太坊哪里不同(一)——货币政策

以太坊经典货币政策的前 51 个时代,从 2015 的创世区块开始至 2136 年,共计 121 年。每个时代 5,000,000 个区块相当于约 2.38 年。资料来源:ECIP-1017 和 Etherplan。

从表中可以看出,类似于比特币,ETC 年化通胀率从一开始就显著下降,并且在 2025 和 2036 年之间发生的第 4 和第 9 时代之间,通胀率从约 4%降至不到 1%,与黄金相比,这是一个较低的库存与流动比率。从那时起,年化通货膨胀率持续下降,直到在第 33 个时代(2033 年)到达 0 为止。

值得注意的是,就总存量而言,到 2074 年发生的第 25 时代,ETC 将达到 198,355,440,非常接近其上限,估计约为 199,000,000。到 51 代 255,000,000 区块(估计发生在 2136 年)时,存量将为 198,827,838,在 62 年中仅有小幅增长。

作为“硬性上限”,如果发生极端且不太可能的情况,以太坊经典矿工在所有区块中都包括 2 个叔块,那么最大供应量约为 211,000,000。这种设计选择试图与比特币的 2100 万 BTC 硬上限相提并论,但要乘以 10。

3. 区块奖励

对工作量证明(PoW)区块中的区块奖励的理解是,发现满足协议设置的难度级别的哈希的矿工将获得该区块的奖励。但是,在比特币中,有时会同时发现一个以上的块并将其分布在整个网络中。发生这种情况时,网络节点和矿工将继续在两个区块上构建,直到一个或另一个首先被取代,并成为“最长”或“最重”的 PoW 链。特别是在比特币中,发生这种情况的规则是“丢失”的区块变为“旧块”并且不获得任何奖励。

在以太坊经典中,由于以更高的频率创建块,因此同时生成多个有效块的可能性更高。ETC 中的规则是同时奖励稳定的块,这些块被称为“叔块”。

4. 奖励增加叔块

为了让叔块被包含在网络中并实际支付其相应的奖励,获胜的块生产者必须在传播它们的块时自愿将其包括在内。为了鼓励陈旧块的传播,需要支付少量费用。

包含在 ETC 中的叔块的奖励费用也由上述时代决定:该费用在第 1 时代是 0.15625 ETC,在第 2 时代是 0.125,然后在从第 3 时代开始的每个随后的时代中,折扣均为 20%。。

5. 每块最多叔块

为了限制发行,以太坊经典货币政策不仅为叔块提供了降价时间表,而且还将陈旧的块包含在主链中,每个获胜块最多允许 2 个叔块。

6. 叔块奖励

关于叔块的具体奖励,每个时代的水平在第 1 时代为 4.375 ETC,在第 2 时代为 0.125,然后在每个随后的所有块中,它们的折扣均为 20%。

7. 叔块封锁率

叔块率是任何给定时间网络中叔块的比率。例如,如果在时代 1 的前 100 个 ETC 区块中,包含并奖励了 6 个叔块,则意味着叔块率为 6%。

以上还意味着 ETC 的发行量更高,因为不仅常规矿工获得了 5 x 100 = 500 ETC 的奖励,而且他们得到了奖励,并且由于包括 6 个叔块而获得了额外的 0.15625 x 6 = 0.9375 ETC,并且叔块生产者得到了 4.375 x6= 26.25ETC 的奖励。结果是,由于包含叔块,此示例中的总发行量从 500 ETC 增加到 527.1875ETC。

本文使用的实际叔块封禁率估算值为 5.4%,这是 ECIP-1017 的作者 MatthewMazur 所使用的预测,这是用于更改以太坊经典货币政策的规范。

8. 每块奖励折扣

如本文所述,对 ETC 的原始货币政策进行了调整,以紧密模仿比特币供应时间表的目标。为了实现这一目标,不仅在第 2 时代将区块奖励,叔块奖励和叔块包容性奖励下调,而且在第 3 时代及以后,将逐个时代地将其递减 20%,直到最终完全消失。

如果叔块率保持在 5.4%左右,上述规定的作用是建立一个大约 199,000,000 ETC 的上限,或者如果极端和不太可能的情况——完全叔块分配的情况发生,则硬上限大约为 211,000,000 ETC。

供应和通货膨胀

下表显示了以太坊经典货币政策的上述八个组成部分的最终供给和年度通胀率演变:

以太坊经典与以太坊哪里不同(一)——货币政策

ETC__年通货膨胀率显着下降,长期而言,该上限接近 199,000,000。资料来源:ECIP-1017 和 Etherplan 研究。

__

__

从上面可以看出,ETC 的发行和存量——流通模式与比特币非常相似,因此也是稳健和最小化信任的货币政策。

结论

区块链的目的是使信任最小化,因此,鉴于现代货币的普遍不令人满意的历史(尤其是由中央银行和政府管理的情况下),该目标的关键组成部分是使货币政策最少依赖于人类主观性来保护人们的财产、权利并防止摊薄。

遵循此前提,以太坊经典的供应时间表是机械的,算法化的,并且有上限,以确保其货币的稳健性。

By 链闻

Published
Categorized as 以太坊

消失的算力,二手矿机的骗局

最近,我收到一位朋友的咨询,让我发现了一种新型骗局。之后的几天,我又发现有三位朋友中招,他们的被骗经历和骗子的手法极其相似,都是在某二手交易平台上购买矿机,都是正常挖矿一周后算力突然消失,很可能是同一伙骗子所为。

奇怪的故障

这天,某A向我咨询,他购买的20台显卡矿机,突然都不能挖矿了。

具体故障表现为:矿池显示矿机掉线。

▼由于长时间没有算力,某A向我咨询时,矿机已经显示为失效了。

帮助过颇多小白的我,还是有一定经验的,我让他用手感受下矿机出风口的温度。

▼这是正常挖矿的功耗

▼这是空载时的功耗

可以发现,矿机如果不在挖矿的话,显卡的功耗会明显降低,出风口应该基本感受不到温度。

某A很快给了我答复,出风口是热的,和之前没有区别。

显然,矿机是在工作的。

既然机器在工作,那就可以直接排除网络和矿池的原因。

因为如果和矿池的连接出了问题,挖矿软件会停止挖矿,显卡功耗也会降低。

似乎只有一个可能的解释:机器被黑了,算力被切到了别人的地址上。

既然是系统被黑了,保险起见,最好的办法就是重装一下。

经验告诉我,一个被黑的系统,重装是最省时省力的办法,鬼知道黑客会搞什么幺蛾子,矿机又没有数据要保留。

在我的指导下,某A成功安装挖矿专用系统。

之后,让我一脸懵逼的事儿来了,居然检测不到显卡!!

▼后台没有识别到任何显卡

一台能插8卡的矿机,主板一定会使用各种奇技淫巧来增加PCIE插槽。

常见的方法有:PCIE交换机、带宽降低到1x、协议使用PCIE 2.0等等,兼容性和稳定性确实一般,偶尔丢一两张卡是很常见的。

但是,能把8张卡都给丢了的,我真是第一次见到。


转机

某A和我折腾了好几个小时,一筹莫展。

就在我几乎打算放弃远程调试,打算让某A把机器寄给我时,某A抱怨了一句:热死了。

这句话点醒了我,我又让某A检查了下出风口的温度,依然是热的。

似乎机器还在挖矿,可是明明连显卡都识别不到。

索性直接让某A把矿机关机,但是依然保持电源打开,过了一会儿,某A检查出风口,居然还是热的。

这就有点儿奇怪了不是?

一不做二不休,不管机器上的防拆贴,我直接让某A找来螺丝刀,拆机。

这一拆不要紧,真是让人大吃一惊。

机器里只有一个小小的工控板,几根电热丝,一个小小的电源,还有一些砖头,机箱两侧是暴力风扇。

▼此处某A不同意使用他的矿机图片,请根据此示意图自行脑补画面。

不用说,某A被骗了。

不得不说,骗子的想象力还是很丰富的。

机箱里的砖头是配重用的,电热丝显然是用来产生热量,让你以为机器在工作。

工控板里刷个系统,再配个电源,齐活。


不解

某A认为他已经足够小心了,走的是二手交易平台,并且正常挖了一周才确认收货的。

很早以前就有一种骗局,骗你购买云算力或者所谓的“矿机”,其实根本就不能挖矿,只能连接骗子提供的所谓“矿池”,上面给你显示点儿算力,每天给你打点儿币,说是挖矿收益。

算力只是骗子搭建的网站上的数字,收益其实是骗子从你买云算力或者矿机的币中拿出一点儿转给你的。

等上当受骗的人足够多了,骗子就卷款跑路,这类骗局最著名的当属“蜗牛星际”。

其实这种骗局很容易识破,只要你要求必须能在第三方矿池挖矿,就可以了。

第三方矿池会公正地显示算力,显然这种骗局中并没有真实算力,因此可以识破。

某A是知道这种骗局的,因此他强调必须要在F2Pool能够显示算力,并且收益要是F2Pool支付的,这至少能保证算力是真实存在的。

经过我的检查,某A收到的收益,确确实实是从F2Pool的地址支付的,可以在链上查到,并且也能在F2Pool上查到相关挖矿记录。

所以,算力是真实存在的,如假包换。

但是,机箱里的这些东西,是不可能产生算力的,到底算力从何而来呢?

某A再三确认,这些机器收到后没有任何其他人碰过,不存在被调包的可能。

我决定仔细研究一番。

由于这台机器已经重装过系统,我让某A又找来另一台机器。


揭秘

经过一番排查,我还真找到了猫腻,不由让我赞叹,这骗子太聪明了。

▼这是常用的以太坊挖矿工具lolMiner是吧,我一开始也是这么认为的。

▼查看一下它的大小,居然只有48个字节,要知道正常的lolMiner的可执行文件应该在8MB左右。

▼查看下内容,这个lolMiner居然是个脚本。

大家是怎么启动挖矿的呢?使用这行命令对吧:

./lolMiner.exe –algo ETHASH –pool 矿池地址 –user 钱包地址.矿机名

因为这台机器上的lolMiner并不是真实的挖矿程序,而是个脚本,上面的命令行参数会补全到脚本里。

最终执行的其实是这个命令:

ssh mos@xxx.xxx.xxx.xxx “~/lolminer/lolMiner” –algo ETHASH –pool 矿池地址 –user 钱包地址.矿机名

这个命令的功能是什么呢?

远程登录http://xxx.xxx.xxx.xxx这台机器,在远程的机器上执行挖矿程序lolMiner,并把程序的输出传输到本地显示,挖矿其实是在骗子手里的真矿机上进行的。

骗子还很贴心地配置了ssh私钥免密码登陆,真真正正地做到了与真实的lolMiner操作没有区别。

估计看到这里,没一定技术基础的朋友一定晕了,没关系,我们画张图,理顺下。

▼正常的挖矿

▼某A的“矿机”

看出区别了吗?

其实真正在挖矿的是骗子手里的真矿机,某A手里的假矿机只不过是给真矿机发了个指令,这也是为什么骗子手里的真矿机能知道某A的挖矿账号的原因。

骗子手里的那些真矿机会把挖矿日志传回来,显示在某A手里的假矿机上,看起来假矿机是在挖矿。

因为骗子手里的真矿机在某A的地址上挖矿,所以矿池有显示,并会支付收益。

因此,某A会以为手上的这台假矿机在挖矿。

沉甸甸的砖头做配重,风扇吹出热乎乎的风,配合上不断跳动的挖矿日志,如假包换的矿池算力显示,还有真金白银的收益,真是完美的骗局!


无奈

一句话,小白矿工,真的太苦了,才出虎穴又入狼窝。

如果说“假矿池”这种坑还可以躲避的话,小白很难避免受到这种“假矿机真算力”骗局的欺骗。

从某A发给我的聊天截图来看,骗子是那么的真诚,耐心指导,消息秒回。

骗子在某二手平台上的信用分也很高,销售矿机的价格又是那么的优惠,比行情价低了两千多。

机器到手后,上面都是防拆贴,你拆了,人家名正言顺地说是你调包,不退不换。

今天是砖头,也许拆了能看出来,明天要是换成报废的显卡呢?你从外观真看不出来。

今天这个脚本只有几十KB,如果下次人家编译一个大小差不多的二进制文件呢?

除了逆向工程,否则你真没办法知道这个程序是不是真的在用你的矿机挖矿,显然不是小白的能力范围。

就算你刷了自己的系统,人家一句只兼容提供的系统,你也没话说。

毕竟,矿机配置千奇百怪,系统不兼容需要额外调试也是很正常的。

你只有10天时间,只要忽悠你10天,钱就到骗子手里了,人家可以直接关了真矿机跑路。

卖给某A矿机的这个骗子,现在就已经消失了,消息不回,电话不接,连地址都是假的。


启示

在这个浮躁的环境下,所有人都幻想着一夜暴富,骗子利用的正是这点。

当你觉得有利可图的时候,请务必问自己三个问题:

  1. 你赚的钱是哪里来的?
  2. 你相比于其他人,有什么优势,为什么是你赚别人的钱而不是反过来?
  3. 你真的了解你所投资的东西吗?

如果某A不是过于自信,而是更多地了解一下矿圈,或者在大量拿货之前,先拿一两台试试,又或者是找一个第三方来检查下矿机,是不是就不会被骗了呢?

很多朋友加我的微信第一句话:李老师有没有什么群可以让我学习一下?

这让我想起了我小时候,练习题买了一大堆,似乎买了你就会了,就能考高分了。

加一大堆乱七八糟的群,真的有用吗?

我们生活在一个信息过载的时代,你需要做的是从海量的垃圾信息中,寻找真实和有用的信息,而不是浸泡在更多垃圾信息里幻想自己也是牛人。

有巨大价值的信息,会出现在几百人个陌生人组成的群里吗?

就算是一个本来有价值的信息,出现在这种群里之后,还有价值吗?

商业的本质就是信息差,众所周知周知的信息,哪里还有信息差可言?哪里还有价值呢?

更别说群里各种骗局横生,某A就是在群里结识的骗子,继而被骗的。

By 李明阳

Complete Guide to Decentralized Exchange (DEX)

Cryptocurrencies and decentralized technologies are booming. The numbers speak for themselves — market capitalizations have gone through the roof, transaction volume has skyrocketed, and adoption from individuals, corporations, and governments has reached a global scale.

Thanks to blockchain technology, we are moving toward a trustless economy, with no need of third parties to exchange goods. Yet today’s digital currency exchanges are centralized. They have proven to be vulnerable to hacks, to react poorly to unusual blockchain events like hard forks, and often run with a high regulatory risk. Centralized exchanges keep their systems off-chain, meaning they operate as escrows for their clients, and transactions are not recorded on the blockchain. This leads to massive breaches of security and unsafe storage of information, funds, and private keys.

Trading comes with risks, but traders should not face any other risks than those they are already willing to take.

Blockchain entrepreneurs understand this, and some of them are working hard on what many believe will be the future of trading: decentralized exchanges.

Decentralized exchanges — or DEXes — aim to tackle the problems that impede centralized structures by building peer-to-peer marketplaces directly on the blockchain — Ethereum mostly — allowing traders to remain custodian of their funds. However, building a fully decentralized and efficient exchange remains today something of an utopia. Exchanges are centralized because it is the simplest way to proceed, and it is either too costly or technically complex to build fully decentralized platforms — for now, at least.

Throwbacks and inefficiencies of centralized exchanges leave the model with only few advantages. Many semi-decentralized exchanges are coming into action. They are hybrid models between centralized and decentralized marketplaces, trying to deliver the best of both worlds. There is an increasing number of such exchanges, following up on a need expressed by the crypto-community.

This “state of decentralized exchanges” begins with major cryptocurrency numbers and centralized exchanges, which currently monopolize the market. Decentralized exchanges are building the future of cryptocurrencies trading, and this “state” aims to pave its way with its rough listing of projects in the making. We should pay attention to them as they are shaping the way cryptocurrencies trading will operate in the future.

Disclaimer: I am part of VariabL (a derivatives trading platform on Ethereum) and ConsenSys (one of the largest global blockchain specialists).

I. Cryptocurrency Market Overview and the Flaws of Centralized Exchanges
2017 Cryptocurrency market in numbers¹ :

+3400%*=Market cap of cryptocurrencies is experiencing an exponential growth:

From less than $18B to more than $600B in 2017.

Crypto market cap comparison & growth stats.

More than 99% of cryptocurrency transactions go through centralized exchanges.

II. Centralized Exchanges

Let’s first define what centralized exchanges are: platforms and apps that enable traders to buy, sell, and exchange cryptocurrencies against fiat currencies or other cryptocurrencies. They are marketplaces for tokens, and are essential to the ecosystem, since many of them enable payments with fiat currencies , i.e. non-crypto holders are able to buy crypto using USD, EUR, etc.

Among most well-known and trafficked centralized exchanges are Bithumb, Bitfinex, Bittrex, Poloniex, Kraken, GDAX, Coinbase and Gemini. Hundreds already exist, but the goal here is not to focus on their number, but rather on their limitations and potential for improvement.

Centralized crypto-exchanges may soon become obsolete as they lose the opportunity to leverage blockchain technology to improve their capabilities and efficiency.

  • Insecurity, risk of fund loss and thefts due to their centralized functioning. They are legally accountable and a custodian of users’ funds. 73% of centralized exchanges take custody of user funds, while 23% let users control keys⁴. They represent honeypots for hackers as they are responsible for billions of trades per day and store most of them on their servers.
  • A lack of liquidity: large orders struggle to be matched. Even at an all-time-high, volumes remain low (compared to traditional markets).
  • A fragmented (not to say decentralized) market: divides the global liquidity into a few main marketplaces. No clear market leader in terms of volume, which increases the liquidity problem.
Ether Exchange Trading Volume in USD - Source: “State of Blockchain — Q3 2017"by Coindesk
Source: “State of Blockchain — Q3 2017″ by Coindesk
  • A high level of risks for users due to potential performance issues, market manipulation, hardware failures, latency problems, and many other inherent problems when it comes to dealing with large volumes…
  • A lack of trust and transparency: actual costs and processes of trading are opaque and involve high trading costs, often higher than announced fees and higher delays due to peaks of demand badly managed. Plus, they can front-run orders, which is illegal.
  • A lack of educated users: markets are flooded by pure speculators unaware of safe ways to deal with cryptocurrencies.
III. Decentralized Exchanges and Open Protocols

Due to the lack of security, transparency, and efficiency that centralized exchanges have demonstrated, a strong demand for decentralized exchanges have surfaced. Scores of new actors are tackling these problems and addressing an obvious need by the community. Projects like 0x, Ethfinex, ShapeShift.io (not decentralized but not custodian) and EtherDelta have emerged and generated a strong interest.

Decentralized exchanges promises two major benefits: Security & control and global marketplace by Michael Oved (founder of AirSwap Team, a ConsenSys Spoke)

One of the oldest projects in the field is EtherDelta, a platform with a simple user-interface and basic trading features (no margin trading), which has already gained sufficient traction to generate up to 25 million USD-equivalent of daily transactions⁵.

Definition

Decentralized exchanges differ from centralized exchanges as they enable users to remain in control of their funds by operating their critical functions on the blockchain: they leverage the technology behind cryptocurrencies themselves to enable a safer and more transparent trading. It solves the main limitations faced by cryptocurrency markets (see above), since there is no single point of failure, aligning them with what has made the blockchain technology so powerful in the first place.

Most decentralized exchanges are not fully decentralized, but semi-decentralized (full decentralization is today more of an ideal, due to limitations listed hereunder). In most cases, servers (centralized) still host order books (among other features) but do not hold private keys.

Another central aspect is that decentralized exchanges present the characteristics, benefits and limitations, of their underlying blockchain.

Main DEX Benefits
  • Trustless, which means that users’ funds and personal data are safe.
  • Security and privacy are well preserved.
Main DEX Limitations
  • Maintain the same scalability problems as the underlying blockchain.
  • Most are not easily usable, struggle with liquidity, do not provide fiat payments etc.

(more details in a section below)

Decentralized Exchange Mapping
Disclaimers:

This “state of decentralized exchanges” may not be fully exhaustive and did not assess all of those projects’ viability nor teams’ legitimacy. However, an effort has been made towards making an exhaustive mapping. Abandoned or scammy projects might be included. It should be taken with a grain of salt and you should conduct your own due diligence before using or investing in any of those.

  • All the projects below are or contain decentralized exchanges functionalities in their global offers. Many are not limited to exchange services. For the sake of that study, and since there are not (m)any fully decentralized and working exchanges, semi-decentralized exchange will be included.
  • Some exchanges offering advanced financial products such as futures or derivatives like dYdX or VariabL are voluntarily excluded of this benchmark since there is another article in the making for these ones.
  • The vast majority is in production/beta; this report aims to list all of them and assess their current state of development. I included their website and Medium accounts when available, which provide most of projects’ updates.

AirSwap (Airswap blog)

P2P decentralized exchange on Ethereum using the Swap protocol

Altcoin.io (Altcoin.io Exchange)

Decentralized cryptocurrency exchange, powered by Atomic Swaps (Beta on testnet)

Barterdex (by Komodo Platform)

Open source decentralized network doing atomic swaps (in production)

Bancor Protocol (Bancor)

Smart contract based token exchange protocol (Live on the Ethereum MainNet)

Bisq (ex Bitsquare)

Crypto-fiat open-source exchange with a desktop application working via Tor to trade Bitcoins (Live)

Blocknet (TheBlocknet)

Decentralized exchange enabling cryptocurrencies trading and fiat currency gateways through cross-chain atomic swaps and cross-chain data transfers (In production)

Coinffeine:

Decentralized Bitcoin exchange with a “Zero Trust” exchange algorithm (Down)

Catalyst (by Enigma Project)

Investment platform for algorithmic/data-driven trading on crypto-assets without a custodian (in alpha; simulation available)

Etherdelta

The cryptocurrencies fully decentralized exchange market leader for ERC-20 tokens (Live)

Etherex

Open-source decentralized exchange built on Ethereum (last update on April 2016)

Forkdelta

Community-driven open source and forked version of Etherdelta, uses the same orderbook and contract (Live on the Ethereum MainNet)

Gnosis Dutch Exchange (by Gnosis)

Decentralized exchange for ERC-20 tokens based on the Dutch auction principle (in production)

Heat

Real-time asset-to-asset decentralized exchange (MainNet)

Herdius (Herdius blog)

Decentralized exchange focused on scalability and cross-chain interoperability (ICO expected in Q1’2018)

Hodl Hodl (Hodl Hodl)

P2P cryptocurrency exchange on the Bitcoin Testnet (Testnet)

IDEX (by Aurora DAO)

Decentralized exchange that provides instant order placement and execution, free order cancellation, and real-time order book updates. (Live on the Ethereum MainNet)

KyberNetwork (by Loi Luu)

Decentralized exchange and conversion of digital assets, api for payments and derivatives (Demo on Ropsten)

Legolas (Legolas blog)

Hybrid centralized/decentralized exchange targeting market makers (In production, ICO Q1’2018)

Loopring (by Daniel Wang)

Decentralized Exchange for ERC20 and Open Protocol to serve multiple public blockchains (in production)

Lykke

Semi-decentralized exchange for cryptocurrencies and fiats (live, with a centralized model. Will switch to decentralized model in the future)

Mothership (Mothership blog)

Decentralized exchange (in production, ICO raised)

NEX

Decentralized exchange on NEO with an off-chain matching engine including payment services. (in production, trading platform launch expected in Q3’2018)

Next.exchange

Decentralized exchange focused on ICOs with Crypto-pools and community trading (in production, launch expected in January 2018)

Nvo.io

Cross-platform modular / decentralized exchange using the Safenetwork for orders validation (in production, launch expected Q1’2018)

Oasis DEX (by Makerdao)

Decentralized Token Market — on-chain market for all token assets in the Maker registry (live on MainNet)

OmegaOne (Omega One)

Decentralized trade execution platform (a Consensys spoke, in production)

OpenANX

Open sourced and governed decentralized exchange (In production)

Raidex

Decentralized exchange with Raiden off-chain state channel technology (in production)

SingularX (by SingularDTV)

Decentralized peer reviewed trading platform for tokenized intellectual property and ERC-20 tokens (Live Beta)

Stellar Distributed Exchange (by Stellar)

StellarTerm is an open source distributed exchange for the Stellar network. (Live since 2015)

Streamity (Streamity)

Semi-decentralized cryptocurrency exchange with fiat onramps (In production, ICO Q1’2018)

Token Store

Ethereum token exchange built on smart contracts in a semi-decentralized way (Live on the Ethereum MainNet)

Waves (Wavesplatform)

Crypto-platform for asset/custom token issuance, transfer and trading on the Waves blockchain, with centralised order matching and decentralised settlement. (Live since June 2016)

Xchainge (xChainge🙂

Decentralized exchanges of crypto-assets (by Counterparty, Open source platform on the Bitcoin blockchain)

Graphene/Bitshares Decentralized Exchanges:

Graphene is an Open Protocol, see more information below.

Bitshares

Decentralized exchange providing price stable cryptocurrencies and banking services on the blockchain (Live since 2014) [Probably the oldest decentralized exchange sill working]

Blocktrades

Decentralized exchange acting as counterparty (Live)

BTSABC

Decentralized exchange powered by Bitshares and Graphene technology -in Chinese (Beta)

CryptoBridge (CryptoBridge)

Decentralized cryptocurrency exchange with multi-signature federated gateway network (Live Beta)

Cybex (Cybex Decentralized Exchange)

Decentralized exchange system based on the Graphene/EOS Blockchains (Beta)

DEEX Exchange (Deex Ex)

Decentralized exchange with blockchain traded funds and many (Private Beta)

GDEX

Offers a stack of decentralized financial services including exchange and banking on a blockchain (Live)

OpenLedger (OpenLedger)

Decentralized exchange powered by Bitshares and Graphene technology (Demo)

RuDEX

Decentralized exchange powered by Bitshares and Graphene technology — in Russian (Beta)

0x Relayers (0x)

0x is an Open Protocol, see definition below and read https://relayer.network for a great explanation of relayers.

Amadeus

Relayers for dApps looking for liquidity to exchange ERC20 tokens (in production)

DDEX (DDEX)

User-Friendly decentralized exchange for ERC20 tokens (on MainNet)

Decent Ex (DecentEx)

Decentralized exchange for Ethereum tokens (on Kovan TestNet)

Dextroid

Low cost trading and user-friendly exchange on the blockchain. (on Kovan TestNet)

ERC dEX (ERC dEX blog)

Decentralized Exchange with advanced financial tools, available on mobile (Beta on the Ethereum MainNet)

Ethfinex

Community-driven, decentralized trading platform for ERC20 Tokens (live)

IDT Exchange (ex Kin Alpha)

ERC20 decentralized exchange (first relayer to go on the MainNet)

Paradex (Paradex)

Exchange ERC20 tokens with a centralized matching strategy (beta on the MainNet)

RadarRelay (Radar Relay)

0x order book to find and trade any ERC20 token. (live on the MainNet)

The Ocean X (The Ocean X)

0x relayer and liquidity pool for trading Ethereum-based token (Beta)

IV. Open Protocols for Decentralized Exchanges
Definition

Open Protocols are setting up and running decentralized applications (dApps) on a common basis: some are designed especially for decentralized exchanges (ie. 0x), others also seem suited (ie. Omise). Both will be mentioned below.

They create synergies by allowing “anyone” to build their own services on top of them: it fosters innovation and is essential for native dApps to interact with each other. For decentralized exchanges, open protocols present the benefits of creating common pools of liquidity by allowing any project built on top to interact with each others.

0x (0x)

Open protocol for decentralized exchange on the Ethereum blockchain (live with dozens of relayers, dApps on open protocols/projects built)

OpenRelay

Open source relay for the 0x protocol

Lendroid

Open Protocol for Decentralized Lending that Enables Margin Trading and Short Selling of ERC20 Tokens

Enigma Protocol (Enigma Project)

Decentralized exchange protocol supporting cross-chain atomic swaps, providing an open infrastructure and trading tools

Graphene (by Bitshares)

A software platform for deploying decentralized ledgers. Not specifically developed for decentralized exchanges.

OmiseGo (by Omise)

Digital Wallets, P2P exchange & Payments (fiats & cryptos) protocol.

Snowglobe (by Alex Wearn, IDEX & Aurora DAO)

Fully-decentralized exchange protocol; designed for high-performance, EVM-compatible, decentralized child-chain exchanges

Swap Protocol (by AirSwap Team)

Peer-to-peer protocol for trading Ethereum tokens, without orderbooks (to be open in the future)

V. What May Slow Down the Adoption of Decentralized Exchanges?

Security benefits, by allowing users to remain custodian of their funds, seem obvious and emphasized by all these hacks stories. So why everyone is not using them?

Some aspects are slowing down their adoption: Education and Technology.

Education

Users are not aware of:

  • Drawbacks and security issues of Centralized Exchanges
  • Security measures to undertake (how to manage private keys etc.) since it is users’ responsibility
  • Existence of Decentralized Exchanges
  • Advantages of Decentralized Exchanges
Technology
  • Usability: DEX are not user-friendly enough (very solvable problem, linked to early stages of projects)
  • Scalability: Possible blockchain bloat with ethereum network congestion and scaling pressure (with Token sales and a slow gas price adaptation…)
  • Speed: Transactions take time to be validated on blockchains
  • Cost: There is a potential high costs per trade
  • Liquidity: Chicken and the egg problem. Traders do not join because traders are not already on the platform to match their orders; getting liquidity through a large adoption by the ecosystem is a long process.
  • Full decentralization: Some services have to remain off-chain and have to suffer from limitations of centralized infrastructures (ie. onchain orderbook are expensive not efficient enough)
  • Front-running risk: miners can preview transactions, since they validate them, and can have consequences on any DEX (market manipulation)
  • Interoperability: need for cross-chain exchanges, and more blockchains/dapps interoperability for decentralized platforms to interact with each others.
  • Accessibility: Need for fiat integrations and stable tokens for lower volatility.

On the matter, Kyber’s chief executive and co-founder, Loi Luu stated:

“…centralized exchanges are potentially unable to handle large volumes of users, touting decentralized trading platforms as a better alternative. However, decentralized exchanges are not as user-friendly as centralized options, and may not have the funds to support mass trading due to small numbers of users.”6

Conclusion

99% of cryptocurrency transactions still go through centralized exchanges; this trend is expected to be reversed in the coming years. Switching to decentralized exchanges is necessary for cryptocurrency users to exploit their full potential, aligning with the decentralized nature of blockchain itself. Education is arriving, and most technological hurdles we face today will probably be overcome very soon.

Differences between projects’ value propositions are hard to spot in this field, and most of them will probably not exist in a close future. However, the trend towards decentralized exchanges is clearly evident.

Centralized exchanges will shift toward decentralized technologies sooner rather than later, but improvements have to come from both sides. Users to learn how to protect themselves, and platforms must provide better security tools, as well as education around common issues and best practices.

“Ultimately, I believe that centralized and decentralized exchanges will co-exist as they each provide their own unique benefits,” says Linda Xie, who sums up the situation pretty well (talking about 0x). Will Warren (0x Co-Founder) goes even one step further by stating that “centralized exchanges will continue to play a critical role in the cryptocurrency ecosystem, because they offer fiat on/off-ramps.” This is one function that fully decentralized exchanges, by definition, do not allow.

If some factors are slowing down adoption, the above-mentioned open protocols (for decentralized exchanges) are fostering development by lowering entry barriers to their implementation and adoption. 0x is probably among the best projects working on the matter. However, even the 0x protocol may suffer from problems like efficiency and scalability, which still represent massive hurdles for the whole blockchain, Ethereum and exchange ecosystem. Solutions in the making, such as State Channels, or Sharding/Plasma, will allow scaling, albeit with certain sacrifices.

From a wider perspective, decentralized exchange adoption will follow the adoption of the (Ethereum) blockchain itself, alongside better educated users and technological breakthroughs. As mentioned, centralized/decentralized hybrid models will most likely get their break first. Fully decentralized exchanges remain an ideal, towards which most of those projects are aiming.

Some questions remain: does everyone want to take care of their own private keys? Probably not, but they should at least have the choice. Friction for new users switching from centralized exchanges to decentralized ones also remain a big hurdle; even the process of switching represents a considerable effort for most users…

vinny tweet

Is the switch is going to happen any time soon? People like Vinny Lingham(Civic) say that some centralized exchanges will soon close, and think this will accelerate the adoption of decentralized exchanges.

If the causes and triggers are matters of debate, we can hardly argue that decentralized exchanges are and will continue to grow as a hot topic of 2018 and potentially an essential pillar of the blockchain ecosystem.

Footnotes:

  • https://coinmarketcap.com
  • https://localethereum.com/ belongs to another type of cryptocurrencies marketplaces not mentioned here but also trending: local P2P token market places. Other examples: https://localbitcoins.com/fr/ or Dether
  • https://blog.localethereum.com/centralised-exchanges-are-terrible-at-holding-your-money/. More hack stories hacks stories: https://bitcointalk.org/index.php?topic=576337
  • “GLOBAL CRYPTOCURRENCY BENCHMARKING STUDY” Dr Garrick Hileman & Michel Rauchs (2017)
  • https://coinmarketcap.com/exchanges/etherdelta/
  • Loi Luu (Kyber Network): https://www.coindesk.com/uc-berkeley-kybernetwork-partner-for-decentralized-exchange-research/

By Nathan Sexer

各大去中心化交易所的比较

由于中心化交易所的诸多弊端,如:交易所跑路、倒闭现象频现,操纵市场、割用户韭菜现象普遍 ,被黑客攻击、监守自盗等事件层出不穷,屡屡致投资者血本无归且无法追查,中心化交易所的劣行已成为区块链及数字货币发展的致命瓶颈。

去中心化交易所将成为数字货币发展的必然趋势已经成为大众共识,在这一大背景下,去中心化交易所成为行业热点是区块链技术发展的必然阶段。

但去中心化交易所开发面临巨大的技术挑战,其难度是区块链技术发展之最。

考察去中心化交易所成功与否,要虑这些要素:性能跨链能力去中心化程度用户体验功能完善度。这些都是硬指标,比较容易衡量。

一、 性能

目前市面上主要的去中心化交易所,包括0X, Bancor, BinanceDEX, EtherDelta, Exchangily, iDex等。

其中0X,Etherdelta, iDex等情能较差,一般撮合需要几十秒甚至几分钟或几十分钟时间,而Bancor, BinanceDex, Exchangily性能较好,其中Exchangily性能最好,基本上达到实时交易处理,性能表面优异。

二、 跨链能力

跨链能力是衡量去中心化交易所的关键指标,0X, EtherDelta, iDex完全是基于以太坊网开发的,只能交易ERC-20代币,实质上不具有真正的跨链功能;BinanceDex是完全基于自有区块链开发的,只能交易在自已链上发行的币,也不具备真正的跨链能力;

Bancor协议兼容于以太坊及EoS两个网络,算是具备了初步的跨链能力;

只有Exchangily具备真正的跨链能力,Exchangily目前支持的网络包括比特币(Bitcoin)、以太坊(Ethereum)、莱特币(Litecoin)、发链(FAB)、比特币现金(Bitcoin Cash)、狗狗币(Dogecoin)等多条主链及这些主链上发行的所有代币,基本上支持了现有的所有主流数字货币,因而其跨链能力无可争议地最强大,是地道的去中心化交易所。

三、 去中心化程度

去中心化程度是衡量去中心化交易所安全可信任指标的关键因素,目前大多数所谓的去中心化交易所事实上是部份去中心化或多中心化,并非真正的去中心化。如Bancor基于EoS的21个节点系统、BinanceDex基于自有网络的11个节点系统,虽然提高了性能,但都不能算是真正的去中心化交易所。

0X, EtherDelta, iDex是基于公有链以太坊网络的,Exchangily是基于公有链FAB网络的,因而可以称为真正的完全去中心化交易所,具有最高的安全可信任等级。

四、 用户体验

用户体验是产品成功与否的重要因素。受制于区块链本身及底层区块链技术限制,用户体验成为去中心化交易所的鸡肋。像0X, EtherDelta, iDex等受制于以太坊的性能,效率低下,用户体验极差,很难被用户接受;

Bancor及BinanceDex目前用户体验算是不错,但也远不够理想。

Exchangily是目前市面上唯一具有类似中心化交易所用户体验的去中心化交易所。

五、 功能完善度

由于去中心化交易所一切数据均在区块链上,并无本地数据库,很多功能如交易历史、订单管理等很难实施,在功能完善度上普遍不佳。

目前仅Exchangily基本具备交易所的全部功能。

其他去中心化交易所:

1.Uniswap

Uniswap 是目前最大的去中心化交易所,日交易规模超过4亿美元。Uniswap交易手续费收入全部分配给流动性提供者,项目开发者分文不取,从这点来看,Uniswap 去中心化程度非常高,去中心化交易所龙头名副其实。

2020年10月,面对 SushiSwap 的步步紧逼,Uniswap 开启了世纪超级大空投,人均分得价值约1000美元的 UNI 代币奖励,成为业内佳话。

Uniswap上币简单,许多热门币早期均是在 Uniswap中交易的。Uniswap的优点是币种数量全,交易深度好,滑点低。

Uniswap的交易手续费为0.3%,全部分配给流动性提供者,目前 UNI 挖矿已经暂停。

Uniswap开创了自动做市商的先河,为Uniswap的交易对提供流动性,需要提供两种等值的代币。例如价值1000美元的ETH和价值1000美元的USDT构成一个交易对。

2.1inch

要说未来Uniswap最大的挑战者,币小宝认为有可能是 1inch。

1inch 有点另类,这是一家聚合交易所。简单来说,就是将其他交易所的交易对聚合到一起,用户交易时,聚合器的算法会发现最佳交易路径,并把交易拆分在多个不同交易所完成。结果是,1inch能够始终为用户执行最佳交易,同时让交易滑点变得最低。

币小宝这里以ETH/USDT为例,进行对比。 在3个交易所中,1 ETH在1inch可以换成561.3USDT,而其他两个交易所分别为558.2和557.7,因此,1inch的交易滑点更低,交易时建议多多对比,可以省去不少费用。

Uniswap与其他交易所不同,1inch目前尚未发行自己的代币,不过距离日期不远了。这点从近期的融资就可以看出端倪。12月2日,1inch宣布以SAFT形式(未来代币简单协议,承诺在将来的某个日期交付代币)完成1200万美金的A轮融资。

3.Balancer

Balancer 与 Uniswap 机制类似,同样采用自动做市商协议,但有三点不同:

  • 最高支持8种资产的做市组合。Uniswap仅支持两种代币之间的组合,例如ETH与USDT各占50%,但Balancer可以自定义资产比例和类别,用户最多可以构造8种资产的组合,因此也被称为N维自动化做市商。
  • 自定义资产比例。Uniswap中两种资产的比例固定为50%:50%,但在Balancer用户可以自行设置。例如之前火爆一时的某个矿池由2%的YFII与98%的DAI构成。
  • 自定义交易费率。用户在Uniswap做市可自行设置交易费率,这对于稳定币交易的用户尤为重要,如果在Uniswap交易稳定币,将被收取0.3%的交易手续费,而在Balancer可能只花费0.16%的手续费。

Balancer的代币是BAL,据币小宝区块链大数据显示,BAL目前流通市值为8600万美元。

Uniswap
https://www.bixiaobao.com/cn/coinlist/Balancer

4.SushiSwap

SushiSwap是Uniswap的竞争对手,无论从功能上还是界面上均采用与Uniswap类似的设计,但SushiSwap 目前有挖矿激励,用户可以在不同的池子质押LP代币获取收入,年化收益40%~150%之间。

Uniswap此外,SushiSwap目前也在测试挂单模式,产品更新速度非常快。

SushiSwap的发展可谓一波三折,目前社区趋于稳定,SUSHI代币价格也由之前最低0.5美元附近反弹至目前的2.4美元左右高点。

5.路印协议

与以上几个项目不同,路印协议的团队来自中国,也是目前国内比较领先的Defi项目。此外路印协议还有几个特点:

  • 采用layer2扩容方案。以上几个项目采用的均是基于以太坊网络(layer2)搭建的,但路印协议采用的是layer2方案。layer2的优势是拥有更高的交易速度和更低的成本,其解决方案也多次受到以太坊创始人V神的认可。
  • 首个上线coinbase的国内项目,另一个是YFII。
  • 采用的是挂单模式,这种模式类似于中心化交易所的交易方式,因此用户更容易上手。近期随着流动性挖矿的兴起,也推出了基于AMM模式机制的交易所。

总之,以上5家交易所侧重点各有不同,1inch主打低滑点交易,路印则发力layer2,主打类似于传统交易所的挂单模式,SushiSwap以挖矿吸引用户,未来,去中心化交易所何去何从,我们拭目以待。

币安去中心化交易所的探索之路

“币安DEX 真的不好用”

2019年以前,币安创始人赵长鹏对DEX并不看好,他在《中心化与去中心化》一文中写道:“目前市场已经以脚投票,中心化交易所更受欢迎,它的交易量和流动性都远远高于去中心化交易所。”

然而2019年1月22日,在新加坡举行的币安峰会上,币安公布了Binance Chain(币安链)以及Binance DEX的计划。一个月后,币安链、币安DEX就上线了测试网。根据公告,币安DEX将在币安链上运行。

不少人在体验了币安DEX 后却大失所望。“注册手续还挺麻烦的,我以前的账户都不能用了,必须重新申请。”加密货币交易者郑文表示。

由于币安DEX 是构筑在币安链上的,所以在交易之前,用户需要创建基于币安链的钱包账号。这也意味着,用户目前所拥有的其他钱包账户(如ETH、EOS钱包等)不能使用,这与传统的去中心化交易所有很大不同。比如以太坊上最大的去中心化交易所 IDEX 可以不需要注册,直接导入私钥或者硬件钱包进行授权连接。

此外,在币安DEX 使用过程中,如果一段时间没有操作,系统会锁定钱包。用户需要重新上传 Keystore 文件、输入密码才能解锁,这些操作可能会让他们错过最佳行情。并且对手机等移动设备,上传 Keystore 文件、输入密码的操作显然比电脑更繁琐。但移动设备又是一个不可或缺的交易终端。在币安 DEX 收集的用户反馈中,一些人就吐槽页面没有对手机进行适配。

在交易过程中,币安DEX 目前仅支持“限价订单”,并不包含”市价订单“,这也与一般的操作习惯不一致。

在交易深度上,币安DEX 中超过 50% 的代币在24小时内没有任何交易,这也意味着用户如果挂单,也不会成交。

“即使赵长鹏说币安DEX 的TPS可以达到上千笔,但深度才是交易关键。”某量化基金负责人朱韵解释说,“去中心化交易所的通病是深度不足,尽管币安DEX 有币安背书,但目前来看效果并不怎么样,深度还是不够。”

除了深度,币安DEX目前上线的交易对有一个很大的问题。BTC、ETH、USDT交易区的币种寥寥无几,而BNB交易区币种多达50多种,这也意味着 Binance DEX 主推 BNB 交易区。而对用户来说,要想交易其他币种,必须换购 BNB 才能交易,过程颇为麻烦。

手续费方面,此前的去中心化交易所为了促进流动性和深度,会向挂单者(maker)收取 0.1% 手续费,而向吃单者(taker)收取 0.2% 手续费,至于交易的Gas费则根据网络拥堵状况收取。币安DEX 表示同样收取费用作为燃料费(GAS),只不过费用以 BNB 进行结算,具体收取机制和比例目前尚未公布。

“ 币安DEX基本就是复制的BitShares。“投资人陈远阁认为,币安DEX基于币安公链开发,模式与BitShares类似,在技术上并未创新。

BitShares 是创始人BM(也是后来 EOS 创始人)在2014年开发的,其订单的撮合不是由智能合约撮合,而是由验证节点来完成,后来BM在EOS中引入了智能合约。BitShares因为用户体验极差,现在交易量仍然极低。

“采取’链上撮合+链上结算’模式,相比中心化交易所,交易速率慢,交易费用高,是其最大的缺点。“陈远阁认为,币安DEX 技术已经落后于整个区块链行业。

他说:“ 币安DEX实际意义也并不大,更多的是噱头。”

币安DEX 容易泄漏私钥

对于去中心化交易所而言,安全性与易用性通常不可兼得。

“就让我们竭力让财富更自由,同时努力提升它的易用性和安全吧。”尽管赵长鹏此前曾表示,币安DEX 会兼顾安全性和易用性。

但目前来看,除了易用性没有做好外,币安DEX 面临的更大的问题在于安全性也存在隐患。

安全方面的第一个风险是用户私钥容易泄露。

“如果用户使用一个硬件钱包与币安公链链接,你会发现你的私钥从来没有离开过你的设备。”赵长鹏在2月7日Twitter 问答中表示,用户私钥由用户自己保管。“并且我们还有很多其他办法去证明即使是使用其他设备或客户端,你的私钥都不会离开你的设备,你将是唯一拥有你私钥的人。”

然而,用户可以保管私钥,不代表私钥不会泄露,并且这种泄露也并非用户自己的责任。

目前,用户在注册账户时,会出现助记词帮助用户找回私钥。不过,恰恰是助记词存在一个致命的问题。

当输入助记词时,一旦某个助记词输入错误,系统当即就会自动提示“输入错误”(并非所有助记词提交时才显示错误),此时就可以逐个换助记词进行尝试,直到正确为止。并且“错误次数”没有限制,这也意味着攻击者可以多次尝试,从而通过助记词找到私钥。

币世界-观点:为什么说币安的DEX是伪去中心化?

Binance DEX截图

此外,重新登陆币安DEX 时,必须通过浏览器上传 Keystore 文件解锁钱包,而这一行为存在极大的安全风险,容易被钓鱼网站植入木马病毒,从而盗取用户账户。

科技博客TechCrunch就曾发文,用浏览器上传私钥文件是很危险的,极易遭受网络攻击,类似 Metamask 浏览器插件、Ledger、Trezor 等硬件冷钱包则更加安全。

不过目前,Binance DEX并未支持Metamask这类的插件。

“币安 DEX 资产并不安全”

安全方面的第二个风险是用户资产可能被盗。

如果说私钥方面还可以通过技术手段进行保障,但对于最核心的用户资产,币安DEX 从一开始就留下了极大的安全隐患。

币世界-观点:为什么说币安的DEX是伪去中心化?

图片来自链塔智库

资产不安全的第一个潜在因素是币安链过度中心化。“币安 DEX 的 11 个节点全部掌握在币安自己手中。”EOS 开发者陈雷表示,”币安DEX 想效仿EOS搞节点竞选,但它目前还没行动,11个节点也都是自己挑出来的。“

在2月7日的Twitter问答中,赵长鹏表示币安链将会诞生11个测试节点,并参照EOS的节点选择。“在前期,币安会从熟悉的合作伙伴中选择节点,但后期将会开放更多的节点。”

至于细节上如何选择,赵长鹏并未透露。由于前期完全是靠币安自己选择节点,那么就完全是靠信用与品牌背书。实际上对于用户而言,并不能有绝对的保障。

“按照币安所说,币安DEX之所以搭建币安链上,是因为觉得ETH、EOS处理速度比较慢。但如果降低节点数量,牺牲透明性换取所谓的高TPS,真的有意义吗?“对于币安的11个节点,陈雷表示不能接受和理解。

按照币安的规划,币安链未来会成为一条公链,可以进行发币以及开发项目。“币安链要成为一条公链,首先就不能只属于币安一家,不然这就是一条私有链。”陈雷说,“对于用户来说,11个节点都是‘自己人‘,用户凭什么相信自己的资产是安全的?”

在这个问题上,赵长鹏也很大方得表示币安在整个网络和节点的选择上占有绝对的影响力。他的解释是,现阶段还是需要以较为中心化的形式进行,在早期团队维持较大的影响力是比较重要的。

“用户在币安DEX的资产只是影子资产”

除了节点中心化,用户资产面临的第二个问题在于币安公链没有智能合约,用户资产实际上存储在币安的账户中。

“币安DEX 还不支持原子级的跨链功能,用户交易的例如比特币、以太坊等资产,实际是一个映射的影子资产。”陈远阁解释说,实际上资产还是交由币安管理,用户只是拿到了币安发放的筹码。

在这种情形下,用户确实可以掌握自己的私钥,但是用户保管的只是币安发送给用户的一些筹码,真实的BTC、ETH等资产,仍然是由币安的网关节点保管的。

在一个完美的去中心化交易所里,资金应该用户钱包地址或者交易智能合约中,用户对他们的资金拥有控制权。当用户发起交易时,所有过程都在链上进行,而资金也不流入交易所,而是点对点直接输送到交易终端,所有过程链上可查、公开透明。

目前来看,币安在安全性上仍然存在较大的问题,这无疑会伤害到用户切身的利益。

“游离于监管之外的币安你敢相信吗?”

根据CryptoCompare数据,期货交易所BitMex因为不受监管在2019年1月交易量锐减41%,而与之相反,受监管的芝加哥商品交易所(CME)交易量呈逆势增长。

从目前全球的趋势来看,监管已成为主要态势,只有接受监管的加密货币交易所才能活下来,并最终占有市场。

“去中心化交易所最大的风险点在于无法监管,区块链若想进入更广泛的群体,必然要从法外之地走向合规化。“陈远阁认为,区块链合规化并不遥远,以日美韩为代表的国家,已经陆续推出了相关的区块链法规制度,币安此时推出去中心化交易所,表明其已经离主流群体越来越远了。“币安不合规之路,如何走?还能不能走下去?这是币安未来面临的最大考验。“

“币安只获得包括马耳他在内的多个小国牌照,难道他只在这些小地方活动吗。”张哲说。

2018年,币安曾被纽约州监管部门点名批评。据Bitcoin Bagazine报道,2018年9月18日纽约州总检察长办公室发布了一份《虚拟市场完整性动议》的调查报告,报告点名批评了包括币安在内的多家交易所,称它们缺乏适当的投资者保护措施,容易变成大户操纵市场的工具。在报告调查阶段,币安以不在纽约州展业为由拒绝配合。

“谷歌和苹果同时下架APP的原因,可能就和纽约州的调查有关。“陈远阁认为,“一旦纽约州刑事调查,赵长鹏人身自由会不会受影响,届时用户在币安的资产怎么办?“

结尾

总之,标榜去中心化的币安DEX 和币安链实际上是一个不折不扣的中心化的产品,安全性与易用性二者似乎都不兼具:安全性上,存在私钥泄漏、资产被盗等潜在隐患;易用性上,注册流程繁琐,交易深度不够。

随着市场逐渐步入熊市,各大交易所交易量缩减已成为一个不争的事实,收入也自然随之减少。根据币安官网公告,过去的一年中,Binance共计完成七次BNB季度销毁,但近四次的销毁量在逐渐下降:

第四次销毁2,528,767 BNB;

第五次销毁1,643,986 BNB;

第六次销毁1,623,818 BNB;

第七次销毁 829,888 BNB。

值得注意的是,币安近期删除白皮书中关于BNB回购的条款。如下图所示,币安白皮书进行了修改,删除了公司用20%的利润回购BNB的条款。

赵长鹏表示,这样做是为了澄清币安实际上并没有回购BNB,而是进行了销毁。“‘回购’一词的使用并不准确。币安的收入本来就是BNB,如果把BNB卖成USDT,再用USDT回购BNB, 似乎这种操作多此一举。当初在白皮书阶段使用这个词是因为没想清楚。部分国家的监管部门不喜欢BNB和利润挂钩,我们听取有关部门意见把这部分描述去掉了。”

币世界-观点:为什么说币安的DEX是伪去中心化?

图:左侧版本显示了2017年首次发布时的原始描述(红色部分),右侧显示了新版本。

但是白皮书在没有经过正当程序的情况下更新本身就很有趣。消息人士表示,此举可能与使用与证券界相关条款的合规性难题有关。

律师Stephen Palley表示,如果监管机构是币安决定背后的原因,那么编辑(白皮书)可能不足以避免进一步的问题。“修改白皮书的措辞并不一定会影响监管机构对某样东西是否属于证券的分析。”

“为什么要搞自己的公链、要用 BNB做燃料、要在BNB交易区放那么多币,根本目的就是为了拉升币价。”朱韵解释说,币安此举就是为了让用户去囤积以及消耗BNB,“这样币安就不用定期回购销毁BNB了,毕竟币安DEX 以及币安链可以帮他们提升BNB价格。“

By 博链财经

Uniswap和Sushiswap的比较

交易所历来是区块链领域的兵家必争之地,而去中心化交易所(DEX)则是本次DeFi热潮的主要赛道之一。从势如破竹的去中心化交易所Uniswap,到近几天名声大噪的赛场新星Sushiswap,一场“swap party”变得越发热闹。今天我们来讲讲这两个DEX,看看它们的异同。

本文主要内容包括以下6点:

l Uniswap和Sushiswap概况;

l 这两家DEX的自动做市商(AMM)原理;

l Uniswap的激励机制;

l Sushiswap的激励机制;

l Sushiswap的早期引流方法;

l 这二者的风险。

Uniswap和Sushiswap概况

Uniswap是一家去中心化交易所(DEX),用来进行代币兑换。

Uniswap是一个运行在以太坊区块链上的流动性协议,也就是一组部署到以太坊网络的合约,所有的交易都在链上进行。它不仅跟传统的加密货币交易所不同,也跟普通的去中心化代币交易所不同。它和上述交易所最大的不同就在于,它是基于兑换池,而不是订单簿的去中心化交易协议。在这里没有限价的买单卖单,用户与兑换池按照实时的市价进行交易,见下图。所谓的兑换池,指的是一个资金池,用户把一定量的token充入资金池,就可以兑换出同等价格的另一种token。在兑换过程中,交易所收取0.3%的手续费。用户在Uniswap中交易的价格则由这个资金池中的代币比例和算法来决定。这个算法是自动做市商(AMM),后文会详细讲。

订单簿
兑换池

Uniswap在2019年就已经上线,现在它已经是头号DEX了。

Sushiswap也是一家去中心化交易所(DEX),用来进行代币兑换。目前Sushiswap尚未完全启动,在它完全启动后,它实现的功能与Uniswap相同。Sushi是日语寿司的意思,所以有人把这个项目叫寿司。

寿司店(sushiswap)菜单

Sushiswap协议是今年8月底才从Uniswap分叉而来,它基本延续Uniswap的核心设计,没有构建全新的模式,同样也是采用兑换池+自动做市商(AMM)的模式。另外,Sushiswap的代币池和前端页面设计与Uniswap也基本相同。

自动做市商原理

上文说过,Uniswap和Sushiswap都是采用基于兑换池的交易协议,依靠自动做市商模式来实现兑换,现在详细讲讲自动做市商(AMM)的原理。

Uniswap并不使用订单簿模式来决定代币的价格,相反,代币的价格(汇率)会在用户交易的过程中连续且自动地根据供需量和恒定乘积公式计算得出。恒定乘积公式就是:X*Y=K。其中X和Y分别代表交易池中两种代币的可用数量。配合恒定乘积公式,一个交易对(也即一个流动性兑换池)中的一种代币的价格,根据池中的供给量和交易者的需求量得出,价格会在根据该公式画出的一条曲线上变动。

X*Y=K,或者说Y=K/X,就是我们初中学过的反比例函数。当K不变时,X增大,Y必然减小,反之亦然。在DEX里,用户向兑换池中充入token X,X的数量增多了,Y的数量必然减小,而这减少的Y的数量就被用户取出,完成兑换。

举例:假设流动性兑换池中有X token1000个,Y token100个,也就是10个X换1个Y。一名用户向兑换池中充入10个X,根据恒定乘积公式计算Y≈99,Y末-Y初=-1,这减少的1个Y就由这个用户拿走,实现了10个X兑换1个Y。

AMM原理示例

S在实际的Uniswap兑换过程中,还存在滑点的现象。滑点是指用户最终实现兑换的汇率偏离了真实的汇率。比如在上面的例子中,如果用户充500个X,他只能换出33.3个Y,相当于15个X才能换一个Y,用户就要承受损失。当兑换金额相对于兑换池资金量过大,或者说对于一定的兑换金额,兑换池资金太少时,就会出现滑点。但当兑换池中的代币数量充足时,滑点的数额就会减少,而且资金越多,滑点越小。滑点的大小和常说的交易深度大小相反,滑点越小,交易深度越大,用户越能够按照稳定的价格完成交易。

同一时刻,ETH兑换LINK,兑换金额太大产生滑点

恒定乘积公式的K越大,也就是资金池里的资金越多时,代币交换滑点越小,流动性也就越好。在这里的流动性就是指当用户想完成某一笔兑换时,他就能够在滑点最小的情况下顺利地完成。AMM模式鼓励用户为兑换资金池提供流动性,方式就是用户向流动性资金池中存入等价值的2种代币,比如上面例子里,用户同时存入100个X和10个Y。如果用户存入的2种代币不等值,比如他存入了100个X和100个Y,(此时的市价还是10个X换1个Y)这会造成兑换池里Y的供给相对过剩,X和Y的相对价值就出现了不平衡。套利者灵机一动,向兑换池里存入383.3个X,兑换出51.7个Y,而按照市价他只能换38.33个Y,于是他净赚13.37个Y。兑换池在经过套利者的一番操作后,又恢复了10个X换1个Y的市价,详情见下表。

套利使系统重新归于平衡

依靠恒定乘积公式的AMM模式需要套利交易来让流动性池中的代币价格与市场价格保持一致。从本质上来说,这些协议依然需要通过外部交易系统来调控流动性兑换池中代币的价格。

AMM模式依靠用户为资金池提供流动性完成自动做市,它给用户的激励就是一定比例的兑换手续费。为流动性资金池提供流动性的用户称为流动性提供者(LP Liquidity Provider)。

Uniswap的经济激励机制

Uniswap给流动性提供者的奖励就是交易所的手续费。流动性提供者可以得到所在流动性池中代币交易的手续费作为奖励,手续费率为0.3%,流动性提供者之间依据存入资金的份额按比例分配。

根据上文截图中的数据计算,一天的成交额是40.85亿CNY,一天的手续费就有122万元,经过一段时间的积累,流动性提供者(LP)得到的手续费奖励金额就非常可观了。Uniswap会根据流动性提供者存入资金的数额发给他们一定数量的LP token,我们可以理解为存款奖状或者收据,它是LP获得交易所手续费奖励的凭证。

注意:LP token不是Uniswap的项目代币或者说平台币,对于每一种代币交易对有不同的LP token。

举个例子具体说明:假设这个交易对是ETH–DAI,目前兑换比例是1ETH–400DAI。我向资金池充了1ETH和400DAI,这个资金池发给我1个LP token,代表我有1份(ETH–DAI)的流动性贡献。这个资金池所产生的手续费进入一个pool,经过一段时间后,pool中共有积累的手续费A个ETH和B个DAI,当我把我的1个LP token交还给Uniswap时,我有权利从pool拿走它按比例对应的手续费。假设此时整个资金池共发出了X个LP token,我的流动性贡献占比就是1/X,我就可以获得A/X个ETH和B/X个DAI,然后再赎回我的1ETH和400DAI。

Uniswap通过AMM模式和为流动性提供者奖励手续费的模式,极大地调动了LP的积极性。由于任何人都可以提供流动性并且从中获利,人们有动力为Uniswap提供流动性;交易所获得充足的交易流动性,交易滑点就小,用户体验也好。交易所的运行完全基于市场的需求进行。人工的运维成本大幅降低。

在Uniswap中,交易产品的挂牌会是免费的。而且由于不需要再用交易订单的模式,而且流动性也不需要专门的做市商来提供,因此目前证券市场中的做市商的成本就可以取消。降低了上币成本和做市成本,Uniswap对DeFi和整个区块链行业的发展起到了一定的促进作用。

为Uniswap提供流动性的用户可以获得经济激励。不过,这种激励存在两个美中不足之处:

1)对早期参与流动性提供的用户不够公平。

Uniswap能够运转,全凭流动性提供者为它提供了大量的流动性。早期流动性提供者承担了更多的风险,但并没有因此获得更多的收益。

Uniswap依靠着早期的LP存入的资金逐步发展,随着它越来越受欢迎,有越来越多的像风投基金、交易所、矿池这样的大资金进入提供流动性。虽然交易手续费累计的很多,但是早期LP的份额被摊薄了,他们没有能够享受到协议成长带来的长期回报。这有点像早期的滴滴司机或者淘宝店主,正是他们让平台实现了发展,然而在平台发展之后他们并没有享受到更多的收益。

此外,流动性提供者只有在他们提供流动性时才赚取资金池的交易费。一旦他们撤回资金池中自己的资金,将不再获得相应的收入。

2)无常损失得不到补偿。

为Uniswap提供流动性可以交易手续费,但也存在无常损失。无偿损失是指流动性提供者按当时的市价存入2种代币,在他要取出这些代币时,它们的兑换价格发生了变化而导致的损失。如果这2种代币中某个代币大幅上涨或下跌都可能导致无常损失。注意,不管涨还是跌,都有可能导致损失。

还是以上面表格里的X和Y为例。当10个X换1个Y时,我存入100X和10Y。假设现在行情变化,也就是X和Y的兑换比例变化了:不管现在是10个X换2个Y(Y跌了),还是20个X换1个Y(Y涨了),我如果想赎回我的资金,都必须按照现在的兑换比例,取出价格相等的X和Y,不能破坏资金池中2种代币的比例平衡,不然套利者就又要出动了。这也就是说,我取出来的不是我存入的100X和10Y,而是按照新的市价的兑换比例,比如120X和8Y。而这相比我直接持有100X和10Y不动,是会产生损失的。

当然,它本质上也是资产的再平衡,从这个角度看,不算是无常损失。不过,在退出时,如果按照法币计价,可能会出现获得的费用收益不如直接持有代币所得的收益更高的现象。而且这个无常损失,是无偿的损失。

Sushiswap的经济激励机制

Sushiswap在Uniswap的激励机制基础上做出了一些改变,这是它们二者最大的区别。Sushiswap增加了代币经济激励,也就是将其交易费用的一部分分配给Sushiswap代币SUSHI的持有人。

Uniswap没有发行平台币,它每笔交易收0.3%的手续费,再通过LP token的形式把交易费按比例分配给LP(流动性提供者)。

Sushiswap发行了平台币SUSHI,它的交易手续费也是0.3%。它将这0.3%的手续费分成2个部分,其中0.25%提供给LP,方法和Uniswap一样;剩下的0.05%将用于回购SUSHI代币,即用这部分钱购买SUSHI代币持有者手里的SUSHI代币。这意味着,SUSHI的价值与Sushiswap平台交易量是挂钩的。在Sushiswap上,交易量越大,SUSHI捕获的价值就越高。SUSHI代币和COMP、LEND、YFI一样,也可以在二级市场交易。此外,为了保证研发和运营的持续,有10%SUSHI代币会用于开发和未来的迭代、审计等。

Sushiswap的经济激励机制在Uniswap的基础上做了改进,它保证了早期参与者的长期利益。

Sushiswap每个区块将释放100枚SUSHI代币,会均分给所有支持的代币池,LP们还是根据流动性贡献来按比例获得SUSHI。和Uniswap用LP token的形式来分配手续费不同,LP token只有在存入代币对时才发给用户,而SUSHI是每个区块都产生一次,根据用户现在的资金比例分配。这样即使未来有大资金进入Sushiswap,早期参与者的资金份额被摊薄,但是他们之前已经获得的SUSHI代币不会减少,这就相当于是挖到了“头矿”。更何况在最初的100,000个区块,SUSHI产量更高,每个区块释放1,000枚SUSHI。在Sushiswap交易额增长起来后,SUSHI代币的价格也水涨船高,早期参与者凭借着早期相对较高资金份额占比而积累下的SUSHI代币可以享受到Sushiswap长期发展带来的福利。此外,前文提及,Uniswap的LP在赎回了当初存入的代币对之后,就不能再获得交易所的手续费分成了,而Sushiswap的LP即使赎回了资金,也还能够凭借着持有的SUSHI代币获得币价上涨带来的利益。

Sushiswap的经济激励机制也并非尽善尽美。SUSHI代币有2个主要用途。第1点是用于投票。投票决定每个区块产生的100个SUSHI在各个代币对兑换池中分配的比例,也就是哪个池子分到的SUSHI奖励多一点;投票决定是不是要新开放某个新代币对兑换池。对于特定的LP来说,这2种投票的目的都是为了让自己获得更多的SUSHI奖励,消耗一部分SUSHI以获得更多的SUSHI。这样会不会造成分配权重大的资金池分配比例越来越大呢,还有待时间的检验。第2点就是上文说的用于兑换那0.05%的手续费。在交易所蒸蒸日上的阶段这当然是好的了,不过如果交易额下降呢。无限通货膨胀的SUSHI和正在下降的手续费分成相互作用,会导致新产生的SUSHI越来越不值钱,对币价下降的预期则会让老持币人竞相抛售。如果他们再从流动性资金池里撤资,交易所流动性不足,引起交易滑点过大,用户体验变差,交易额就会进一步下降。这样的恶性循环会迅速让它承受巨大损失。这样的情形不一定会出现,但是会有这样的风险。虽然在Uniswap中同样存在交易额下降引发流动性下降的恶性循环,不过它没有平台币,也就没有币价下降的第三重刺激。

Sushiswap中同样存在无常损失。

Sushiswap的大招

仅靠改进的经济激励模型,能不能让Sushiswap超越老大哥,坐上DEX头把交椅呢,我们不得而知。不过项目方还想了别的办法,真正的大招还在后头呢。

第一步。Sushiswap为Uniswap的流动性提供者提供了赚取SUSHI代币的机会。Uniswap的流动性提供者可以将其LP token质押在Sushiswap,然后在区块高度10750000开始赚取SUSHI代币。目前只收LP token,还不能直接存入代币对。这好比是你在一家大银行Uniswap存了钱,它发给你一个收据,凭此取钱。新银行Sushiswap说,你的收据质押在我这里,1星期以后我给你这张收据发利息,你的钱还在原来的银行,收据你想拿走随时拿走。这样的好事谁不干,于是大家纷纷把Uniswap的LP token质押在Sushiswap。

只要LP token

第二步。在协议启动大约两周(最初100,000个区块)后,Sushiswap会启动针对Uniswap的流动性池迁移计划。在迁移过程中,首先是这一批用户在Uniswap上进行代币对的赎回,然后将这些代币池迁移,也就是把从Uniswap里取出来的钱存到Sushiswap里。就这样,Sushiswap将获得大量的流动性,它的流动性是从Uniswap那里直接拿来的。

近日Uniswap锁仓量(就是资金池的存款量)暴涨,原因就是Sushiswap只收Uniswap的LP token,用户必须先到Uniswap去存钱,换出LP token,才能把它质押到Sushiswap里。

复制粘贴你的运行原理,剪切粘贴你的用户。

SIGOI!(日语:好厉害)

风险

最后我们谈一谈这两家DEX的风险。

l 技术风险

Uniswap在2020年3月19日在以太坊主网上推出了一个新版本,还配合着公开了核心合约的1.0.1版;在发行之前,该版本已经在Rinkeby测试网上测试过一段时间了。这个新版本在以太坊主网上已经使用超过了两个月时间,而且迄今为止,没有出现任何损坏智能合约完整性的问题。

Uniswap V2 在上线主网之前经过了充分的测试和审核。对源代码的尽职审核“很有可能”保证了未来不会发现任何重大的问题,不过Uniswap还是发布了一个Bug悬赏,任何人发现了重大漏洞都可以获得奖金。

从Sushiswap宣布的信息看,它邀请Trail of Bits、PeckShield、OpenZeppelin、Consensys、Certik、Quantstamp中的其中一家对其合约进行审计。但目前为止还没有完成正式审计。这里是有潜在风险的。即便完成了审计,任何流动性挖矿都存在潜在的智能合约漏洞风险。

编写出没有任何错误的代码是非常困难的,而开发人员也不可能设想到所有的潜在风险,尤其是在DeFi发展如此火爆的今天。Uniswap和Sushiswap都存在一定程度的技术风险。审计、测试以及购买智能合约保险都可以降低技术风险。

l 经济模型风险

许多区块链项目,特别是在DeFi领域,都需要依靠经济激励来激励网络的参与者。有时候经济模型看起来无懈可击,却包含着潜在的风险。

对于这两家DEX的LP来说,首先要面对的就是上文所说无常损失风险。而且是为价格波动越大的币种提供流动性,出现无常损失的风险越高,这导致很多用户发现,为DEX提供流动性(也就是流动性挖矿)带来的收益还不如无常损失更多。

SUSHI是每个区块产生100个,它与比特币、以太币等不一样。比特币只有2100万枚,而SUSHI是无限通货膨胀的,未来Sushiswap的交易额增长能够跑得过无限通胀呢,现在还没有一个明确的结论。

交易额下降会不会引发流动性枯竭,造成恶性循环,这是它们都面临的风险。

l 外部风险

外部风险指的不是Uniswap和Sushiswap本身存在的风险,而是在它们上线的项目中存在的风险。例如:项目的虚假宣传、项目方大量抛售代币导致币价崩盘等等。

只需要建立两个资金池,就可以无上币费、无审查、无成本地“三无上币”,大大降低了项目方发币割韭菜的难度和成本,这简直比2017年还疯狂。

结语:

以前说币圈一天,人间一年,现在是DeFi圈一天,币圈一年。这两家swap不是“swap party”的谢幕,还会有更多DEX和其他项目粉墨登场。希望各项目能够互相促进,共同为数字金融和区块链行业的发展助力。

本文部分观点参考以下文章:

有关Uniswap V2的一切:新功能与工作原理。www.8btc.com/article/641872

火币观察:SUSHI飙涨行情耀眼,SushiSwap是否存在风险?www.jinse.com/news/blockchain/804917.html

从Uniswap看未来的数字资产交易所。www.8btc.com/article/636431

全维度深入解析:Uniswap的正面与背面。www.8btc.com/media/636300

SushiSwap锁仓超10亿美元,赚钱效应成DeFi繁荣的最大推手。www.jinse.com/news/blockchain/805211.html

Sushiswap:Uniswap的进化?http://blog.csdn.net/lanhubiji/article/details/108289403

作者:蒋梦初

币安与Coinbase的相爱相杀

4 月 14 日 13:43,在 Coinbase 即将正式登陆纳斯达克的最后关头,“戏剧性”的一幕发生了。

Coinbase 于上市文件(S-1)中点名指出的头号竞争对手、已明确表态不会上市的币安官方宣布将上线 Coinbase 股票代币 COIN。 

币安「抢上」Coinbase

恍惚之间,人们突然意识到,在打通传统资本与加密货币的壁垒这件事上,Coinbase 及币安这两大顶级交易所似乎已走上了不同的道路:前者选择了亲身登陆传统资本市场,为传统证券市场的投资者们提供投资加密领域优质企业的便捷渠道,后者则是选择了一种更加 crypto 的方式,通过股权代币的形式为加密投资者打开了投资传统资本市场优质资产的窗口。

不过,如果细看 Coinbase 及币安的战略布局,不难发现这两大引领了整个交易所赛道发展数年之久的顶级玩家其实很早之前就已走在了岔路之上,且正各自引领着一批“后继者们”朝着截然不同的方向迈进。 

01 下一站,传统资本市场 or 新兴加密世界?

Coinbase 及币安站上岔路口的时间节点大致可以向前推溯至去年夏秋之际。

2020 年 7 月,路透社从数位知情人士处获悉,Coinbase 已悄然启动上市准备工作,数月之后,Coinbase 宣布已向美国证券交易委员会(SEC)提交了 S-1 注册申请,正式确认了外界关于其上市筹备的传闻。

同年 9 月,在以太坊 gas 居高不下,体验愈发糟糕之际,币安宣布兼容 EVM 的币安智能链(BSC)主网正式上线。仅仅半年过去,BSC 之上已构建起了繁荣的生态规模,DeBank 数据显示,目前 BSC 链上的 DeFi 总锁仓量(TVL)数据为 237.5 亿美元,已达以太坊链上 TVL 的三分之一。

币安「抢上」Coinbase

从经营特色及业务重心上看,Coinbase 及币安长期以来一直存在着较大的差异。

Coinbase 自诞生以来一直秉承着传统严谨的打法,仅在获取了监管许可的地方开展业务,不发平台币,不做衍生品,不上线甚至会主动下架在监管层面存在争议的代币(比如 XRP),这些近乎极致的自我约束为其选择登陆传统资本市场打下了良好的基础,最终也为其赢得了赛道内首张登陆纳斯达克的船票。

Coinbase 的成功也激励了无数后来者。年初, Gemini 创始人 Winklevoss 兄弟在接受采访时就曾回答称:“我们正在观察整个市场,我们内部也在讨论在这个时间点将 Gemini 上市是否有意义。”本月上旬,Kraken 方面也透露称正在考虑于明年的某个时候上市,可能采取类似于 Coinbase 的直接上市方式。

与主打美国市场的 Coinbase 不同,币安对于传统市场和新世界都有打算。

由于币安的全球业务范围更广,涉及司法辖区更多,因此不得不采取一种非标准化、更灵活的的合规策略。具体来说,币安会在监管更加严格、明晰的地区与当地合规主体合作,由这些合作伙伴推出完全符合当地监管要求的平台来进行独立运营,比如与 Coinbase 同样专攻美国市场的币安美国(Binance.US)现在就已拿下了 37 个州的运营牌照,未来待也不排除上市可能;而在监管相对积极的地区,币安的选择是通过主站(Binance.com)快速抢占市场,结合用户需求持续不断地推出合约、期权、Staking、DeFi 挖矿等全新服务。

而 BSC,则是币安在过去以及未来很长一段时间发展的重中之重。作为一家顶级中心化交易所的创始人,赵长鹏本人曾多次强调去中心化交易所(DEX)才是未来的大势所趋,这或许也是币安没有像 Coinbase 一样选择拥抱传统资本市场,而是朝着加密货币世界更深处走去的潜在原因。

币安「抢上」Coinbase

当前,BSC 生态内已涌现出了海量项目,各类基础设施、DeFi 及 NFT 组件等等均已趋向完善,除其自身生态持续活跃,用户及锁仓数据大有直追以太坊之势外,BSC 也引领了一阵交易所公链的集体爆发潮。

BSC 的成功也反哺了 BNB,作为链上唯一的 gas 通证,其诞生及爆发为 BNB 赋予了全新的使用场景及价值内涵,这也是 BNB 在过去几个月内持续攀升的关键原因之一。

02 核心业务对比,BNB 还能继续飞吗?

自从 Coinbase 确认即将上市以来,关于该交易所的估值猜测就从未停歇。纳斯达克今早给出的参考价格(非开盘价)设定为单股 250 美元,以该价格计算,完全稀释后的 Coinbase 估值将达到约 653 亿美元。如果按照投行 Moffett Nathanson 给出的单股 600 美元目标价计算,Coinbase 完全稀释后的估值更是将高达 1567 亿美元。

在外界关于 Coinbase 的估值猜测水涨船高之际,BNB 的价格及流通市值也在持续攀升,这不禁让人想把这两家顶级交易所拉着做一场系统性的大对比,看看双方的核心业务数据究竟孰优孰劣?营收水平各自如何?估值(代币流通市值)是否合理?谁被高估或是低估了?

在对比之前,首先需要就数据获取申明两点原则:

  • 所有拟对比数据之中,仅有少部分数据有明确的官方信息源可查,因此在引用非官方数据时,我们将优先选取信誉度较高的第三方数据源(因 CoinMarketCap 已被币安收购,所以下文的第三方数据源优先选取 CoinGecko),另外一些第三方数据源亦无法提供的信息,我们将通过特定规则推算估测,具体推算方式会加以说明。
  • 由于部分数据来自于推算,故相较真实情况可能会有一定偏差,下文对比结果仅代表基于文内推算规则所呈现的理论结果。

对比维度一:交易量数据

由于 Coinbase 并不提供衍生品交易服务,所次这里的交易量对比仅限于现货数据。

上周二,Coinbase 正式发布了该交易所 2021 年第一季度的业绩预测报告,报告内提及,预计 Coinbase 第一季度总交易量为 3350 亿美元。我们尝试拿这一数据去验证 CoinGecko 数据的准确程度,由下图可见,过去 24 小时 Coinbase 的交易量约为 42 亿美元,可推算该交易所在一个季度的时长范围内交易量数据基本也是会在三千余亿美元这一水平线。

币安「抢上」Coinbase

再看币安,过去 24 小时,仅币安主站(Binance.com)的交易量就已达到了 506 亿美元,是 Coinbase 交易数据的十倍有余。

综上,在现货交易量方面,币安相较于 Coinbase 有着压倒性的优势。这一数据并不令人意外。目前,币安主站共支持 299 个币种、1020 个交易对,Coinbase 则仅支持 54 个币种、162 个交易对,更多的币种及交易对意味着更多的投资选择,上图之中「Visits」一栏清楚地展示了,在同一时期内币安的访客数据(1.38 亿人次)远高于 Coinbase(1788 万人次)。

币安「抢上」Coinbase

注:Alexa 给出的加密货币网站人气 Top 50,币安是唯一一家战胜了 CoinMarketCap 及 CoinGecko 的交易所网站,可看出其网站流量优势。

对比维度二:营收数据

理论上来讲,交易所营收的最主要来源是用户的交易手续费,考虑到币安在现货交易量上的压倒性优势,且在 Coinbase 尚未触及的衍生品交易领域也居于市场头名,其营收水平理应远高于 Coinbase,那么具体情况究竟如何呢?

还是先丢出 Coinbase 自己披露过的数据。在提交给 SEC 的 S-1 表格中,Coinbase 透露该交易所在 2020 年的总收入为 13 亿美元,净利润为 3.2 亿美元,调整后税息折旧及摊销前利润(EBITDA)大约为 5.3 亿美元。

币安「抢上」Coinbase

而在上周发布的 2021 年第一季度业绩预测报告中,Coinbase 预计其第一季度季度总收入为 18 亿美元,净利润约为 7.3 – 8 亿美元,EBITDA 大约为 11 亿美元。

再看币安,去年 12 月,赵长鹏在接受彭博社采访时曾提及,2020 年币安的净利润约为 8 – 10 亿美元,对比同时期 Coinbase 3.2 亿美元的净利润状况,可以看出币安的确有着更强的营收能力。

至于 2021 年第一季度的营收状况,由于币安作为私企并没有经营状况披露义务,因此在官方不主动透露的情况下很难获知具体数额,但我们可通过 BNB 的历史销毁情况大致捕捉到一些蛛丝马迹。

截至发文,币安仍未公布 2021 年第一季度的 BNB 销毁情况,所以我们选取过去四个季度的平均销毁数量来进行推算。查阅币安官方公告可知,过去四个季度的 BNB 销毁数量分别为 3373988 BNB、3477388 BNB、2253888 BNB、3619888 BNB,均值为 3181288 BNB。

至于 BNB 价格,如果取第一季度最后一天(3 月 31 日)的市场报价 270 USDT,反向推算得出 BNB 第一季度的销毁金额为 8.59 亿美元;考虑到第一季度 BNB 几乎呈现着单边上涨行情,更合理的方式或许是取季度最高价及最低价的中位数 180 USDT 计算,这样反向推算得出的 BNB 第一季度的销毁金额为 5.72 亿美元。

接着,我们再根据推算出的 BNB 销毁金额来反推其第一季度营收状况。这里需要特别澄清一件事,在旧版 BNB 白皮书,币安曾明确提及将拿出单季度利润的 20% 来回购 BNB 进行销毁,但在新版白皮书中这一描述已被删除。但从历史经验来看,过去几个季度的 BNB 销毁数量与币安平台的交易量仍呈正相关,因此这一步的推算仍将根据旧版白皮书的 20% 规则进行,如果币安已有了新的未公开销毁标准,这一步的计算误差理论上的确会进一步放大。

简单计算后的结果是,如果 BNB 取价 270 USDT,2021 年第一季度币安的预期利润为 42.95 亿美元,如果 BNB 取价 180 USDT,2021 年第一季度币安的预期利润为 28.6 亿美元。

综上,无论取哪个数字,推算得出的币安 2021 年第一季度预期利润较 2020 年全年利润均高出数倍之多,但考虑第一季度恰逢史无前例的超级牛市,Coinbase 单季度净利润也数倍于 2020 年全年利润,推算结果似乎也在情理之中。

对比维度三:估值(流通市值)/利润数据

相较于单纯的交易量及营收数据,估值(流通市值)/利润的具体比例可以更清晰地看出市场对于交易平台股价(币价)的情绪状况,也是判断双方是否被高估或低估的一大重要参考标准。 

还是先行丢出 Coinbase 的数据,如果依照纳斯达克给出的参考价格 250 美元,完全稀释后的 Coinbase 估值将达到约 653 亿美元,对应第一季度 7.3 – 8 亿美元的净利润(注意是单季度极润),估值/利润比例约为 81.6 – 89.5 之间。如果按照投行 Moffett Nathanson 给出的单股 600 美元目标价计算,Coinbase 完全稀释后的估值将高达 1567 亿美元,对应第一季度 7.3 – 8 亿美元的净利润(注意是单季度极润),估值/利润比例约为 195.8 – 214.6 之间。

币安「抢上」Coinbase

再看币安,随着 BNB 近期的一轮暴力拉升,BNB 流通市值现已达到 907 亿美元。参考上一环节,如果取 42.95 亿美元的第一季度预期利润,币安的流通市值/利润约为 21.1,如果取 28.6 亿美元的第一季度预期利润,币安的流通市值/利润约为 31.7。 

综上,即便在 Coinbase 的单股报价上取了相对保守的纳斯达克参考价格(250 美元),其估值/利润(81.6 – 89.5)比例仍远高于在单季预期利润上取了相对保守数据的币安流通市值/利润比例(31.7)。 

考虑到 Coinbase 作为首家直接登陆传统资本市场的加密货币交易所,也将在短时间内成为 old money 通过二级证券交易平台持有币圈头部交易所合法权益的唯一选择,其股价存在一定的溢价并不令人意外。

不过,整体对比下来不难看出,币安在交易量、营收状况、估值(流通)/利润等方向较 Coinbase 仍有着一定的优势,因此,即便不谈 BNB 是否被低估,其近期的强势表现多少也有些价值回归的意思。

03 不上市的币安,终点在哪里?

自 2018 年起,赵长鹏就曾多次在公开场合或私下采访中明确表态,币安暂时没有 IPO 计划。

诚然,Coinbase 的成功上市是该交易所自身发展历程上的一大阶段性胜利,也将为 Kraken、Gemini 等后来者们打通一条荆棘之路,更是会成为整个加密货币世界迈向主流的一大里程碑事件。但我们更好奇的是,不上市的币安,其终点究竟在哪里?

今年年初,赵长鹏在回答媒体提问时曾就不上市的原因给出了更进一步的解释。赵长鹏表示:“币安更希望走的是一条更适合加密世界的道路,扩大其实用型通证 BNB 的效用。”

不难看出,赵长鹏指出的「更适合加密世界的道路」显然包括其在 BSC 上的探索,也应该包括最近刚刚启动,即将“抢上”Coinbase 的股权代币交易业务。这在一定程度上也贴合了币安对于其自身的定位——不仅仅是交易所,而是要做加密货币世界的开放性服务平台。事实上,长期以来币安一直在持续扩充着交易之外的业务版图,公链、投资基金、矿池、钱包、数据分析、支付……币安的脚印正遍及加密货币世界的每一个角落,也难怪业内会戏谑一声“币安宇宙”。

By Azuma-星球日报

为什么要销毁代币

代币销毁就是将代币从流通中永久性移除,并减少总供应量的过程。为了解释这一过程是如何实现及怎样运作,接来下我们以Binance Coin(BNB)为例。

Binance通过名为“销毁函数”的智能合约功能来执行定期的Coin Burns事件。BNB销毁事件计划为每季度发生一次,直到最终销毁的BNB数量达到1亿,而这一数量相当于BNB总发行量(2亿BNB)的50%。而每一季度BNB的销毁量也将根据3个月内交易所中进行的交易量来执行。因此,在每个季度后,Binance将会根据总体交易量来销毁BNB。

如何销毁代币?

最常见的方法是将代币打入黑洞地址。黑洞地址是指丢了私钥,或是无法确定其私钥的地址,这些地址就像黑洞一样,只进不出,任何 Token 打到黑洞地址里就几乎不可能再转出来进入市场流通了。 基本上来说,代币销毁事件将会按照如下顺序来进行:代币持有者将调用销毁函数,并表示他想要销毁一定数量的代币。之后智能合约将验证是否他的钱包中是否持有BNB以及他所陈述的BNB数量是否准确。钱包中的代币数量为正数才有效。

如果此人并没有拥有足够的代币,或者制定的销毁量无效(如0或-5等),则该销毁函数将不会执行。如果代币持有者拥有足够的代币,则将会从钱包中扣除该数量。 之后代币的总供应量将会更新,而之前指定数量的代币将被销毁。如果您执行了销毁函数来销毁您的代币,则这些代币将会永久消失。已被销毁的代币将无法恢复。

为什么要销毁加密货币?

除了代币,其他的加密货币一样会销毁。比如销毁比特币,听上去可能是觉得很糟糕。但事实上,损坏或销毁加密货币的事件发生得十分频繁,而且也并没有听上去那么疯狂。

销毁加密货币,可以使剩余加密货币的价值升高。这是因为大多数加密货币的数量都是有限的。例如,比特币的总发行量是2100万个,现在处于流通状态的比特币有167万个,假如现在有100万的比特币被销毁了,而市场对比特币的需求仍保持不变,在这种情况下,比特币供应量的降低就会使其价格飙升。

这里面就涉及到一个问题,销毁加密货币意味着你要损失自己的钱财。如果我有1000枚比特币,我把它们全都销毁了,比特币的价格可能会提升 了,但这对我来说毫无意义,因为我手里已经没有比特币了。但是,为什么还会有人要销毁比特币呢?

主要原因有以下几个:

新的分红方式:平台通过发行自己的代币,来为公司的发展筹集资金。这就意味着如果你买了平台的代币,你就可以成为这家公司的股东,进而从公司的盈利中分得一杯羹。平台会不断从市场上回购代币,并将它们销毁;通过这种方式使得市面上的代币数量减少,进而提升其价格。而该公司的股东虽然没有得到直接的利润,但却可以使他们手中代币升值的方式对其进行了分红。

赋予新代币以价值:销毁加密货币的另一个重要原因就是,这么做可以赋予一种新发行的代币以价值。销毁加密货币是一种投资于全新加密货币的方法:为了获得一种新的货币,你必须“烧掉”(摧毁)另一种货币,比如比特币。从理论上讲,这将使每一种新的加密货币价值相当于被摧毁的币的价值,但实际上你不能真的摧毁加密货币,你只是把它送到一个会减少它的总供应量的地方,后文会对此进行详细描述。

清除未售出的ICO代币:大部分ICO在发行过程中会为要售卖的代币设定一个数量。而当ICO发行结束,代币却没有售光时,那些没有卖出去的代币就会留存在公司的钱包里。这时代币的价格已经由于ICO的发行而上涨了,也就是说发行公司没有购买这些代币,却白白获得了代币所拥有的价值。他们完全可以把钱包里剩下的代币在市场上卖掉,让自己小赚一笔。一些发行ICO的公司因此制定了一项销毁未售出ICO代币的政策。其中一个例子就是Neblio。他们遵守规定将ICO发行期间未售出的代币全部销毁,并通过这种方式,证明了他们只用ICO中筹集到的钱来开发自己的区块链项目。因此,他们凭借ICO发行所获得的收益完全取决于人们对他们团队代币的需求。这是保证公平的一种方式。

提醒:当一个公司声称他们要把加密货币销毁的时候,你一定要留心一下他们有没有采用“燃烧证明”机制,并对销毁过程进行追踪。

币安的销毁规则

币安于2019年10月17号公布了BNB的第9次销毁记录,据官方公告称,币安“完成上个季度2,061,888 BNB的销毁“,等值36,700,000美元。

然而,本次销毁却因为币安CMO的何一和OKEx的CEO Jay在微博上的“互撕”,变得格外引人关注。两位高管在微博上唇枪舌战,你来我往,互不相让,完全不念旧情。

 每逢销毁必撕逼? 

在火币公布第三季度HT的回购销毁量2天后,币安第三季度对BNB的回购销售数据也出炉。然而本次BNB的回购却又一次被质疑,擅自更改回购销毁规则、回购不透明、团队涉嫌套现等情况又一次把币安推上了舆论的风口浪尖。10月18日,圈内媒体区块律动发微博报道BNB第三季度的销毁数据,却引来OKEX的CEO Jay的质疑。

每逢销毁必撕逼? BNB到底错在哪

2019年7月,币安公布第二季度BNB销毁数量和规则时,就曾被火币指责过,何一和火币CEO七爷在某媒体群里对BNB的销毁进行辩论。而本次的核心矛盾和上次的核心问题几乎如出一辙。其中大家讨论和质疑最多的就是币安擅自修改销毁规则。此前币安的7次销毁BNB,均是来自当季度币安利润的20%,由于币安的主要利润就是BNB,所以是直接从币安的利润中直接销毁掉。而从今年第二季度时,币安就改变了销毁规则,不销毁利润的20%,而是直接从团队持有的BNB进行销毁。这样说有点拗口,我们来举个例子:假设市场上原有流通的BNB一共有1000个,币安一个季度赚走了其中的100个BNB,等币安承诺的日子到了,币安就会把这100个BNB中的20%,也就是20个BNB直接销毁掉,这样市场上的BNB就只有980个了,以此类推,每季度的销毁可以保证在市面上流通的BNB是逐渐减少的。而币安从第二季度就悄悄地改变了一下规则,这100个BNB的利润,不再进行销毁了,而是直接从币安手里原有的BNB进行销毁掉。也就是说,市面上流通的BNB可能还是1000个。

这不是币安的第一次改变规则,4 月 18 日,据 the block 报道,币安在新版白皮书中,删除了 「回购」一词,原版本中关于 「每季度公司将用 20% 的利润回购并销毁 BNB 」 的条款。改成了「每季度公司将基于币安交易利润销毁 BNB」。

如下图所示,左边的版本是 2017 年首次发布时的原始描述 (用红色突出显示)。右边则是新版本的变动。

每逢销毁必撕逼? BNB到底错在哪

币安创始人 CZ 对此的回应是:因为一些地区倾向于将盈利与证券联系起来。

另外一点值得疑问,而且币安也没有进行公开的回应,就是币安第三季度的销毁金额甚至要比第二季度和第一季度相加还要多。各位也清楚,第三季度开始后,整个数字货币市场进入熊市,币价下跌,交易量,交易活跃度也都相应的往下走。币安在第二季度的交易量为1596.2亿美元,虽然第三季度后半段加入了合约贡献的交易量,但依然下滑至1139.42亿美元,交易量缩水28.62%。交易量缩水,而且币安还下调了交易费费率,按说第三季度的利润应该远不如第二季度,而币安的销毁规则是本季度利润的20%,这个比例不变的话。币安本次的销毁金额为何远超第二季度呢?多出来的利润是哪里来的?

 币安是个好的项目方,不是一个好的交易所? 

回顾币安的发家史,“创新”是币安的一个重要标签。在币安以前,交易所不知道自己也能够发币——平台币。后来平台币的模式,基本被所有交易所使用。首创IEO模式,又带动了2019年的小牛市,也引领了一阵IEO风潮。BNB的价格也是从最开始的0.15美金,最高涨到接近40美金,即便是现在也有18美金,近120倍的涨幅。这几乎跑赢了从2017年以来市面上所有的加密货币。币安是不是一个好的项目方?是。投资人赚到,团队的员工也赚到了,在资本的世界里,这就是最优质的创业者。但是币安是不是一个好的交易所呢?表面上看,币安从2017年开始起家,用户和交易量一度登顶,成为全球最火热的交易所之一,甚至首先主网上线的公链和去中心化交易所,都一直走在了几大交易平台的前列。另外在全球化方面,币安也是做得比较好的,币安在多国拿到了合规牌照。同时在非主流资产的识别与挖掘上,币安也有很大的优势。但是,交易所最重要的也是赖以生存的安全问题,币安却栽了跟头。2019年丢的7000个BTC还历历在目。回顾交易所的发展史,有多少交易所死在了安全问题上。还有就是技术和使用体验,这点我们在上一篇《币安的困境》中有说,在此不再过多提及了。

 三大平台孰优孰劣?

BNB和HT的定期回购销毁,保证平台币是以通缩模型存在于市场,更像是通过市场交易提前去兑现平台的价值,特点是稳定。OKB的每周分红,更像传统证券市场的股票分红,持有者相当于是OKEx的股东,根据用户OKB持有量占比,将平台收益分发给持有者。无论是平台币被赋予的实用功能,还是其在价格上的升值预期,平台币之争归根到底是交易所之间对流量的竞争——只有交易所大规模盈利,才有利润注入平台币,围绕平台币的生态才得以繁荣。何种回购或者奖励规则,任何一种平台币的真实价值都取决于其应用价值。

By 鸵鸟区块链

Complete guide to Zcash

What Is Zcash?

Zcash is in the same category as other so-called “privacy coins” such as Monero, PivX, and Verge. The creators of Zcash want to use the underlying technology of Bitcoin and improve it by giving their users the ability to make their transactions untraceable and thus maintain their privacy. The privacy coin market is highly competitive and Zcash sets itself apart with its focus on science-backed technology and a team that is dedicated to decentralization and privacy.

Who Is Behind Zcash?

As the origins of Zcash lie in academia it’s not particularly surprising that the team behind the cryptocurrency contains a number of experienced computer scientists and cryptographers. This highly experienced team used cryptography to design a way to “shield” ZEC transactions and thus protect user privacy. Zcash gives users the ability to engage in two types of transactions. The first is a transparent transaction, which works essentially the same way as a Bitcoin transaction. Users also have the option to store and send their currency from a shielded address. This allows users to hide the metadata behind their transactions and thus maintain control over their privacy. zcash shielded wallets. A user can send money to a shielded wallet from a transparent wallet and this will only reveal the funds sent and not the funds received, this also works in reverse.

What Is Zcash’s zk-SNARK?

These shields are created using zk-SNARKs (the acronym stands for Zero-Knowledge Succinct Non-Interactive Argument of Knowledge). This is an interesting form of zero-knowledge cryptography. They allow one party (the prover) to prove to another (the verifier) possession of data (e.g. a secret key) without ever revealing the information or directly interacting with each other. Zcash is a privacy-focused cryptocurrency. See our cryptocurrency guides on Monero, Dash, and Verge — these are also known as privacy-oriented coins. This means that rather than directly validating the sender and receiving addresses, Zcash is able to validate a transaction without revealing any of the underlying information.

What Proof Is Required To Validate A Zcash Transaction?

In order to validate the transaction, the sender of a ‘shielded transaction’ constructs a proof to demonstrate that: The input values sum to the output values for each shielded transfer. The sender proves that they have the private spending keys of the input notes, giving them the authority to spend. The private spending keys of the input notes are cryptographically linked to a signature over the whole transaction, in such a way that the transaction cannot be modified by a party who did not know these private keys. A shielded transaction is also able to verify that a user possesses enough ZEC in order to process the transaction by using “commitments” and a corresponding nullifier.

What Are Zcash’s Unique Identifiers?

These commitments are all given a unique identifier called an “rho”, which is used to verify the payments. When a shielded transaction is spent the sender publishes a nullifier, which is the rho’s hash from an unused commitment. This provides a zero-knowledge way to demonstrate that they are authorized to make the transaction. The team behind ZEC insist that their blockchain is truly independent and decentralized, despite accusations that it is a corporate coin. They argue that because the protocol behind Zcash is open-source, they don’t have any control over the mining and distribution of ZEC, nor have access to any special shielded features.

Bitcoin vs Zcash: Similarities And Differences

How does Zcash compare to the leading cryptocurrency Bitcoin? What are the key differences? See below for our head-to-head comparison:

The Brief History Of Zcash

The precursor to Zcash started its life in form of Zerocoin. This John Hopkins University (Baltimore, USA) project was designed to address one of the primary drawbacks of Bitcoin, its lack of privacy. This eventually led to collaboration with cryptographers from MIT and Tel Aviv University in 2014, who improved the underlying protocol of Zerocoin. In 2015 the first mentions of collaboration between the Zerocoin team and Zooko surfaced and the coin was rebranded Zcash and released on October 28th, 2016 by the Zcash company.

How Was Zcash’s Launch Welcomed?

The launch of the coin was met with a lot of hype that resulted in the cryptocurrency being worth more than 6 Bitcoins (over $5,000) on the day of launch. This speculation quickly died down and since then ZEC has grown at an organic rate. The original launch was met with some controversy. Zcash was created using a “Parameter generation ceremony”. This involved 6 individuals who each created a fragment of the eventual “master passkey” necessary for Zcash to work. These keys were described as toxic waste.

How Do Zcash Master Keys Work?

A master key requires all 6 shards. This requires a lot of trust in the 6 individuals involved and the ceremony has been described as little more than security theatre. If the passkeys were somehow leaked or the individuals involved had colluded then it is theoretically possible for somebody to acquire the master passkey, which would give them the ability to create their own ZEC. It is impossible to prove the process worked. That being said, the security surrounding the event was particularly tight and there were no reported problems, bar a journalist’s phone acting very strangely.

How Could Zcash Be Compromised?

Despite the potential problems, it is also worth keeping in mind that only a single participant needs to have successfully destroyed all traces of their shard in order to ensure the ceremony was a success. So in order for someone to gain access to the master key, it would require all six participants to either be dishonest or compromised. By May 2017 the Zcash foundation had launched as “A non-profit organization, serving the Zcash community and promoting financial privacy”. This was a major milestone for Zcash which had always maintained that the currency was decentralized to serve the public’s interests, despite claims to the contrary.

How Is Zcash Made?

Zcash is mined in a similar way to most other cryptocurrencies. Governments or banks are centralized institutions that physically print money. Instead, Zcash and other cryptocurrencies take a decentralized approach. ZEC is created by its community through mining. The principles of the basic technology behind Zcash are the same as the technology behind Bitcoin. Both coins are mined through solving algorithms using computing power. The blockchain is secured through a consensus mechanism called Proof-of-Work (POW).

How Does Zcash Mining Work?

A miner uses their computer in order to solve complicated equations. Once the equation is solved, a new block is added to the chain and the miner is rewarded with ZEC. This reward system serves two purposes. The first is to encourage miners to devote computing power in order to complete transactions on the Zcash blockchain. Ethereum is now moving from using a proof-of-work (PoW) mechanism to implementing a proof-of-stake (PoS) protocol. The second is to regulate the creation of new ZEC, which is then distributed by the miners.

What Is The Zcash Founders’ Reward?

Zcash differs significantly from other cryptocurrencies because until 2020 the founders will receive a “founders reward” of 20% of all ZEC created. They have agreed to set aside 10% of this in order to create the Zcash foundation. This means that until 2020 miners receive 80% of all coins produced, the founders receive 10% and the Zcash foundation receives the other 10%. After 2020 the reward will halve and miners will receive 100% of all ZEC produced.

What Do Experts Say About Zcash?

As with most cryptocurrencies, the short-term price outlook for Zcash can be described in one way — volatile. The cryptocurrency market is still young and therefore still unstable. You should expect fairly big peaks and troughs in the short term. In the medium, to long-term, you may see Zcash experience a slow and steady increase in value as it has in the past. You will see ups and downs and while some do buy low and sell high, this is a more risky approach than holding for the long term.

Edward Snowden’s Opinion On Zcash And Privacy Coins

Zcash has proven to be fairly divisive amongst experts. Some, such as Edward Snowden, have argued that Zcash is important because it is one of the few privacy coins developed by actual cryptographers. Snowden has argued that this makes Zcash safer to use than Monero which he has described as “amateur crypto” pointing to traceability issues and design errors with Monero. “Zcash’s privacy tech makes it the most interesting Bitcoin alternative. Bitcoin is great, but if it’s not private, it’s not safe.” Edward Snowden

Manfred Karrer On Zcash

Regulation And Competition Others have also come out in support of Zcash and privacy coins in general.

Manfred Karrer, Developer and Founder of Bitsquare said: “I expect three things. One, regulations on cryptocurrency exchanges will come. Two, the war on cash, gold, and cryptocurrencies will accelerate. And three, privacy-protecting technologies like Monero and Zcash will elevate in importance.”Manfred Karrer, Founder of Bitsquare Despite these positives, there are a number of experts who believe that Zcash is too centralized to be considered a true privacy coin.

By Saul Bowden