U in blockchain
block head: record the characteristic value of the current block
block body: actual data
Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:
1, open source code
upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public
2, complete decentralization
anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"
3. Developing decentralized applications
through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers
In the bear market of blockchain, how to find the real valuable blockchain projects? Xiaobian explains from the following aspects:
1. Use the blockchain security technology testing center to see if it is MLM coin or air coin
no matter how advanced the concept is and how exaggerated the slogan is, the essence of any project still depends on technology. Blockchain projects without technology are just like the emperor's new clothes, We need a mirror that reflects the emperor's new clothes - blockchain security technology testing center
As one of the important initiators of blockchain security technology testing center, Tianhe Guoyun, the provider of ulord public chain technology, provides code audit function, which is a sharp tool for blockchain security technology testing center to identify blockchain projects. Code audit is to build a knowledge base of block chain code automatic audit with the help of machine learning and artificial intelligence. It can improve the efficiency of code audit and solve the security problem of intelligent contract. Through the quality evaluation of blockchain projects, exchanges, wallets and smart contract codes, blockchain code audit can prevent digital asset security accidents, provide code revision measures, security protection deployment and other services. It is reported that in addition to automatic audit, Tianhe cloud blockchain code audit can also customize expert team projects for all-round audit to help investors identify "fake projects" to a greater extent2. Look at the team of blockchain project
the blockchain field can be regarded as a comprehensive field, involving cryptography, mathematics, economics, even social management and other disciplines. We have a reliable team. As I mentioned above, the ulord project brings together a large number of high-level R & D and operation personnel
3. It is not only the concept of stir frying, but also the application of it
there are many startups in the field of blockchain. If you want to become a few widely recognized high-quality projects, it is not feasible to just speculate on a set of concepts or theories. Only the projects with the ability of making blood and doing things on the ground are good projects
at present, DAPP ushare, an application based on ulord public chain, has been officially tested on October 15. Ushare Youxiang is the first decentralized experience value sharing platform in the world, and the first DAPP based on ulord public chain. Through the decentralized consensus mechanism, we can build an open, fair and just content evaluation system, encourage high-quality experience procers and experience sharing disseminators, and let the value of high-quality experience flow
there are nearly 100 teams and projects carrying out negotiation and cooperation with ulord public chain
4. Communities have autonomy attributes
whether communities have Dao (distributed autonomous organization) attributes, which is naturally suitable for blockchain,
about community governance. Whether it's the operation mode of the community or the organizational form of the developer community, it's actually a process from quantitative change to qualitative change. We have realized the importance of community
ulord adopts the community autonomy mode of "everyone can participate and contribute to the ecology"
we will have some new community governance modes, including the cooperation of some developers and the cooperation mode of large-scale open source community, which will be born and flourish
The incentive system mainly includes three aspects: first, participation in bookkeeping; Second, the contribution of network resources; Third, participate in community construction. As mentioned above, in the accounting part of our whole budget system, the pow + POS part accounts for 60%, the contribution level of participating in open source community code accounts for 10%, and the remaining 10% is used as an incentive for community operation. Therefore, we hope that more people can participate in the construction and promotion of ulord. We hope to build a platform, but the dividends obtained by this platform should be shared with everyone in the largest range, which is essentially different from Internet proctsMain chain: an independent blockchain network officially launched. It can be said that the entity of blockchain storing data is generally considered to be the main chain network itself. For example, BTC main network, ETH main network and EOS main network are main chains
side chain: first of all, the essence of side chain protocol is a cross block chain solution. In short, through this scheme, data information can be transferred between two blockchains. The original proposal of side chain is based on the transfer of bitcoin and other digital assets among multiple blockchains
generally speaking, the side chain is like a channel, connecting different blockchains together to realize the expansion of blockchain. The side chain is completely independent of the main chain, but the two books can "operate with each other" to achieve interaction
side chain protocol - side chain protocol refers to (take bitcoin as an example): it can safely transfer bitcoin from the main bitcoin chain to other blockchains, and also can safely return to the main bitcoin chain from other blockchains. The same is true here for bitcoin to Ethernet or other blockchains. Then, why do we need side chain, or what are the advantages of side chain
the function that the main chain lacks is provided by the side chain
for example, bitcoin network does not have the function of smart contract, but it can achieve this function through the side chain
if the operation efficiency of the main chain is low, some functions of the main chain can be transferred to the side chain
for example, the transfer speed of the main chain is very slow, and there is no way to meet the daily payment needs. We can develop the lightning network as the side chain to meet the daily payment needs. Also because of low performance, Ethereum can not support large commercial DAPP (decentralized application), which can be realized through side chain development
if we put aside the technical rigor, we can use another simpler way to understand the side chain. All the networks that provide support or services for the original primary network can be called side chain, regardless of whether the side chain adopts blockchain technology. For example, the
third party payment network (Alipay / WeChat) can imagine the banking network as the main chain while the third party payment is a side chain.
for cryptocurrency trading, the free network such as bitcoin and other virtual currencies can be regarded as the main chain, and the exchange can be regarded as a side chain
RSK and loom are separately developed side chains for bitcoin and Ethereum main chain
in the first application, both the main chain and the side chain are centralized
in the second application, the main chain is decentralized and the side chain is centralized
in the third application, the main chain is decentralized and the side chain is also decentralized. With the deepening of blockchain technology, we can see the value exchange activities of human beings, It will graally transition from the first application to the third application
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system