Cross-chain is a popular word this year. The core problem of its solution is value exchange and value island communication. The purpose is to achieve blockchain interconnection and break the data island. At present, there are many cross-chain projects. The most familiar ones are the cross-chain duo: polkadot and cosmos. In addition to these two projects, there are many cross-chain related projects. Here is a brief introduction to these projects. .
1, Polkadot Poca token DOT, a total of 10 million. The main network of Boka has not yet been launched, and the token has not yet been issued (it is expected to be issued in August). However, due to the fact that the project is too hot, there are already many exchanges on the DOT futures, the price range is 120-220U, which is not a single currency. Recharge, private price of 98U.
Boca is a collection of blockchains consisting of multiple blockchain heterogeneities. It is a system that allows independent blockchains to exchange information with each other. It consists of parallel chains, relay chains and transfer bridges. The goal is to Now, the independent blockchains are connected to realize the mutual circulation of assets and data between the chains.
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Polkadot was founded in 2015 and the main person in charge of the project is the famous Dr. Gavin Wood. Dr. Gavin Wood is one of the founders of Ethereum and the author of the famous Ethereum Yellow Book. After leaving Ethereum, Gavin set up his own technology company, Parity. The current Polkadot project is managed by Parity. DOT is the original token of the Polkadot platform. It is mainly used for: management platform, operation network, blockchain creation through mortgage DOT, payment information transmission fee, etc.
The number of Twitter fans is 29.5K, and the number of tweets is 1283. Recently, Boka China’s promotion activities are being carried out. The community activity is still very good. There are also several WeChat fan communities in China. There are more than 3,000 telegraph groups, and the number is not large, mainly due to technical exchanges.
Polkadot's biggest risk is whether there will be many value islands in the future. If there are too few valuable islands, then the cross-chain will look very tasteless. This is also a common problem for all cross-chain projects.
Official website related links
Polkadot wiki related links
Cooperation projects: Chainlink, Aragon, Adex, ChainX, Ocean Protocol, iExec, etc.
2, Cosmos token ATOM total of 237 million, circulation rate of 80%, currently on the line more than 30 exchanges. The private offering price is 0.01U and the current price is 6.2U. Most exchanges and mainstream wallets support ATOM pledge mining.
Cosmos was originally scheduled to go online in April 2017. The result was postponed until this year. The founder was Jay by the Byzantine consensus engine Tendermint. The Tendermint team was the first cross-chain concept that was first developed for the BFT consensus engine. A heterogeneous network supporting cross-chain interactions by the Tendermint team consists of a number of independent parallel blockchains. The Tendermint consensus algorithm allows a large number of autonomous and easy-to-develop blockchains to expand and interact with each other, solving the blockchain value islands. The problem of building a bridge of value networks. ATOM is a token of Cosmos Hub that can be used for spam prevention mechanisms, mortgage dividends, and community management voting mechanisms.
Cosmos's entire system can be split into two parts, the Hub Center and the Zone partition, on the Zone partition, different blockchains, Dapps, and even some services of the traditional enterprise in the future can access the Zone partition, and the Hub Center is like a logistics center. When the partition 1 submits a request, or a token parcel, the center will record this information, and at the same time, as a relay station, the request parcel is sent to the designated partition 2. Cosmos reached a cross-chain agreement by recording the status of different blockchains and the relationship between the regions and the center.
Compared with Boca, the expansion of Cosmos is to pursue a light client, reduce equipment pressure, and facilitate developers to expand the application. Everyone can be regarded as an open source system, like Android; and Boca can only use subserate to develop, relatively closed. The development cost is also higher, like the Apple system.
In addition, Cosmos has a similar Parachain, but unlike Poca, Cosmos' Parachain needs its own consensus mechanism and needs to maintain network security. The similarity is that Cosmos has a Cosmos SDK, similar to Bokari's Substrate. Both of these can be used by developers to quickly build a blockchain framework, and the network structure is similar.
ATOM pledge mining annual income is not bad, the exchange is about 8%-9%, imtoken wallet pledge income is about 12.9%, and can participate in the proposal vote.
In terms of community, Twitter paid attention to 25.7K, 907 tweets, and 11,193 telegraph groups, and the activity was not bad.
3, Wanchain token WAN total 210 million, circulation rate of 51%, on-line 8 exchanges (including currency security, fire coins). The white paper is very authorious. To build the future financial infrastructure, the recent code updates are more frequent, and the nodes have also increased a lot. The 4.0 version of the main network is about to go online. As for the landing situation, it is necessary to keep an eye on it.
Project Description: Wanchain is a smart contract platform for blockchain technology with privacy and cross-chain functionality. The Wanchain blockchain is based on the code of the Ethereum. The 1.0 version of the main network was launched on January 18, 2018, and added privacy features such as ring signature, real-time address and seal system at the top of the smart contract platform. Version 2.0 implements the cross-chain capability on the Ethereum blockchain, and version 3.0 will enable cross-chain capabilities on the Bitcoin blockchain. The 4.0 version will be released in Q4 2019 according to the roadmap and will provide a simple framework to support across all chains.
The vision of Wanwei Chain is to establish a decentralized bank. Nowadays, different digital assets are isolated from each other. Wanchain has opened up various assets that are not connected to each other, and deploys decentralized financial applications all in the chain, making the value different. The chain is free to flow, effectively avoiding the threat of traditional centralized competitors.
The consensus mechanism is the galaxy consensus – a practical PoS consensus protocol with a complete delegation mechanism.
Team: Founder Lu Xujun, who came back from studying in the United States, had a mature blockchain project operation experience in the United States. In 2015, he worked with foreigners to get a notary public (FCT), which was quite successful. But the former well-known foreigner Dustin, who often appeared in the past, is no longer in the team list, and he doesn't know why he left.
In terms of community, Twitter paid attention to 109K, 607 tweets, and 24,948 telegraph groups, with high attention and activity.
4, NULS total 100 million circulation 38.6% on the line of 17 exchanges, private placement price 0.098U, the current price of 0.88U, the historical highest price of 8.5U. Focusing on one-click chain building and micro-services, Nash Chain has been very eye-catching both in terms of currency price and project development. Although the NULS team did not have the protagonist aura like the previous Boca and cosmos, it can be seen from the current technology landing to the community operation that the project is more practical step by step.
Project Description: Nash Chain (NULS) is a blockchain infrastructure for customized services, a global open source community project. NULS adopts the micro-service idea to realize a highly modular underlying architecture, using modules, smart contracts and cross-chain technologies, combined with the ability of the chain factory to quickly chain, reduce the development cost of blockchain, and promote the commercial application of blockchain. . NULS proposes a micro-service architecture with modular thinking and multi-chain parallelism, adhering to the development concept of “chain” as the core, and creating a core product “chain factory”. Based on NULS, users can flexibly choose core modules such as network modules, consensus modules, storage modules, ledger modules, and smart contracts to create new blockchains in the NULS chain. They can also define themselves through smart contracts with very little programming effort. Business logic.
The consensus mechanism is POC (Credit Consensus Mechanism). At present, the NULS core team has promoted cooperation with companies such as Firebase, Consensus Lab, BEPAL, Hyperpay, AnyBit, Chain World, Nodeforge, etc., and they have participated in the NULS Master. In the node ecosystem of the network.
The project code has been updated in the last half month, and the community is very active. From the official account of NULS in terms of currency, the average frequency of an article is updated every day. It can be seen that the progress of the project is good. Team technical members and the world's major community leaders have a very real presentation on the website, which is better than most blockchain projects.
Another good news is that the NULS Foundation plans to fund the repurchase of 1 million NULS from the secondary market to motivate the construction of the upcoming NULS 2.0 ecological project (referred to as the pull plate, just like the recent GXC and NAS). After the repurchase announcement, the price of the currency has increased sharply).
5, ælf token ELF total of 1 billion circulation rate of 30%, on the line of 55 exchanges. The private placement price is 0.1U, the current price is 0.2U, and the historical highest price is 2.77U. The consensus mechanism is PoW + PoS hybrid. The frequency of code update has been increasing in the past six months, and it is ranked 23rd in the development of GitHub. The project has won more than 20 institutional investment, and has won the 18th blockchain influence enterprise award, and its technical strength is relatively strong.
Project Description: ælf is a decentralized cloud computing blockchain network with high performance, resource isolation and a better governance and development structure. In the network of ælf, the nodes are divided according to the type, and the specialized accounting nodes (all nodes) can run on the server cluster to improve the performance of the entire blockchain network; the "main chain + multi-side chain" structure can effectively realize resources. Isolation, "one chain and one scene"; set up a system of entrusted votes for token holders to ensure efficient network management and sound development.
ELF is mainly used for ælf's paid resource payment and governance decisions. The paid resources include smart contract deployment, upgrade and execution operations (such as transaction fees, cross-chain data transfer fees, etc.), and governance decisions include the election of billing nodes, Approval of new features of the system and decisions for major product updates.
On the team side, aelf's overall structure is relatively complete, the team is mostly technical staff, the project's general manager Ma Yibo is a technical background, and has rich development experience in the blockchain industry. Most of the project consultants are also the best in the industry.
The number of currency-holding addresses is 51,000. Although the number of addresses has increased a lot in the past year, the concentration of chips has also increased. The number of coins in the top 100 addresses accounts for 98.26%, and there are not many hand-operated coins.
In terms of community, the Twitter telegraph group has 39,000 people, Twitter has a number of 36.4K, and 932 tweets, which are updated daily. But compared to the speed of its code update, market sentiment and community activity are average, and almost a half month to see an ELF-related newsletter. It may be due to the team's partial technology, the marketing promotion ability is weak.
6, ArcBlock block basestone token ABT total of 186 million circulation 53%, the issue price of about 0.47U, the current price of 0.37U. The highest historical price is 1.66U. There are 27 exchanges on the line, the main network has been online, the code has been updated this month, but the GitHub development comprehensive ranking is 286, from the code development point of view is a little worse than the previous projects.
Project Description: ArcBlock is a service platform dedicated to the development and deployment of decentralized blockchain applications (DApps) and a multi-participating ecosystem that provides developers with a decentralized autonomous user identity (DID). ABT chain network and Forge chain development framework integrated with cloud computing, one-click chain, cross-chain communication, multi-chain interconnection, and weaving chain network, let DApps run on different blockchains on demand, helping all walks of life Seamlessly connect existing systems and services with blockchains, give full play to the role of blockchain technology in transforming existing business data, users and processes, and promote the formation of a new information society infrastructure.
On the core team, the official website shows only 4 people: Bo Zhihong, Chen Tian, Chen Jun and MATT MCKINNEY, while the core technical staff is only CEO and chief architect, Shi Zhihong, online information shows that he worked at Microsoft before, but The companies that they founded later are not very successful. Personally, they think that the development prospects of ArcBlock from a technical point of view still need to be carefully watched. The official website consultant team has Netease founder Ding Lei, which should bring a lot of popularity to the project, but the online did not find the public news of Ding Lei and ArcBlock project. In addition, ArcBlock's chief scientist, Flavien, currently has multiple blockchain projects and is also a CTO at an Irish company called Trezeo. Therefore, Flavien is probably only a consultant for ArcBlock, and is not involved in the development of the ArcBlock project.
The project has a currency holding address of 15,000, and the top 100 address holds 93% of the currency, and the chips are concentrated. Twitter pays attention to the number 37.5K, tweet 825, and the update is more frequent. The telegraph group has a population of 16,800 and is generally active. The domestic community is still hot, and the price of the wallet on the wall has been speculative in the previous period. At present, the price of the currency has dropped.
Official website related links
7. The Ontology ONT project was launched in March 2018, with a total volume of 1 billion, a circulation rate of 60%, an issue price of 0.2NEO, a maximum price of $11, and a current price of $1.56. It has been launched on more than 50 exchanges and ranks high in the domestic public chain. . The consensus mechanism is VBFT (interested to poke links to understand this consensus algorithm related links )
In the past month, the progress of the ontology project has been remarkable: combined with MixMarvel to launch the HyperDoo game of Yundoulong sister game; Ontology stable currency PAX login to OnTrade; 16th with the ecological partners to enter the Vietnamese market and unveiled at the OKEx Open Winning Cooperation Summit; 24th with the game The giant gumi Cryptos reached a cooperation to enter the Japanese market; ONT is about to launch the digital wallet Zeux, and open the global ApplePay and Samsung Pay payment; on the 30th, the first anniversary of the main online line, the ontology test network was officially launched.
Project Description: The ontology trust network architecture has a distributed and integrated trust system, which combines the trust diversity under the simplified protocol system, integrates the distributed multi-dimensional entity authentication system and various different blockchain systems and information systems. Incorporating multi-source authentication and multi-source information exchange protocols, and providing open basic modules for different distributed application scenarios, implementing a distributed peer-to-peer trust system, building cross-chain, cross-system, cross-industry, cross-application and cross-terminal distribution Trust infrastructure.
Token distribution ratio: Community and user feedback 12%, institutions and partners 28%, NEO Council 10%, ontology ecological expansion 25%, ontology technology community 10%, ontology core team 15%.
8, PChain project started in June 2018, token PI, total 2.1 billion, circulation rate of 20%, 7 exchanges on the line, but not yet on the line of the three major exchanges familiar to everyone (coin, fire, OK ), the founder Dr. Cao Feng is still active in the currency circle/chain. He often attends various blockchain technology conferences to share the progress of the project, and the team's technical strength should be ok. Recently, the PI online coin security DEX has been approved, and everyone can also pay attention to the short-term opportunities.
Project Description: PCHAIN Network (PI) is a new type of native multi-chain system that enables large-scale industrial applications of blockchain smart contracts. The main technical innovations of the PCHAIN Network include: the world's first native multi-chain, multi-level sharding consensus pipeline, intelligent data (SmartData) smart contracts and cross-chain calls and transactions that support EVM.
9. The AION project was launched in October 2017 with a total volume of 318 million and 100% circulation. The crowdfunding price is $0.75-$1, the highest price is $11.5, and the current price is $0.13. There are 12 exchanges on the line, both mainstream exchanges, and liquidity is OK. The project development team displayed on the official website has strong technical strength, social media updates are also very frequent, the telegraph group is more than 30,000 people, and the activity is quite high. There are many foreign loyalty powders, but there are not many domestic publicity. We discuss this project. Also less.
Project Description: Aion is a revolutionary multi-layer blockchain platform that links basic blockchain protocols across different blockchains to address the pressing issues of limited operability between existing blockchains while still being able to Handle your own apps. It is scalable, customized and multi-layered. Support for custom blockchain architecture and provide cross-chain interoperability. Users can use the AION network protocol to cross-link to get the data they need. Aion not only connects different blockchains, but also creates a unique base model. AION tokens can be used as fuel for the entire network to create new blockchains, monetize cross-chain bridges and protect the entire network.
Official website link related links
10, ChainX launched this year's project, one of the Poca ecological projects, to do asset cross-chain agreements. The total number of PCX is 21 million. At present, there is no big exchange, the current price is $2.2. The project force should wait for the wave card to test the online line. At present, PCX has two methods of asset mapping mining and voting mining. If you are an early investor in DOT Boca, you can directly map DOT to dig PCX. The two mining revenues are relatively high, and the daily income is 0.6%.
ChainX writes in the white paper and the official website that the core is to make a smart contract chain. Polkadot officially does the infrastructure layer, and other businesses are implemented by community teams (such as ChainX).
The first goal of ChainX is to do the decentralized exchange on Polkadot, the real cross-chain decentralized exchange, not like BTS has a centralized gateway, not like the 0x, Kyber and other Ethereum decentralized exchanges can only Trading erc20 related tokens. Chain X is not too difficult to understand in the decentralized exchanges. The architecture is similar to traditional centralized exchanges. The difference is in the use of multi-signed smart contracts and mappings to replace the wallet in which the centralized exchange stores user tokens. The most criticized centralization organization is credibility. Once the money is stored, all the money deposited by the users will be lost. ChainX is locked and multi-certifier controlled by multi-signing address or contract, the management of funds is more transparent and decentralized, and users also have ownership of their own assets.