Blockchain never lacks seeds

1.

In 2017, blockchain technology is undoubtedly a new wave of technology after the mobile Internet. From the three dimensions of technology implementation, commercial application and commercial realization, blockchain is expected to become a new technology after the mobile Internet, which will once again subvert people's digital lifestyle. At present, the new technology wave of blockchain fascinates more and more developers. Therefore, Neo, a non-profit community blockchain project, joins hands with Microsoft to open the first domestic blockchain developer competition, aiming to proce more excellent applications based on Neo blockchain and Microsoft's development environment and tools, so as to form a strong application ecology for blockchain developers

"People are using blockchain technology in a more interesting way as the basis for 'decentralized applications' rather than just applications like financial technology and cryptocurrency," said Mike Mason, technical director of the office of chief technology officer of ThoughtWorks, a global software consulting firm. You know, "blue ocean" has never lacked players. Some Internet companies are trying their best to land on the beach, and have established the blockchain instry market as an inevitable choice for development. In China, netxin technology, a wholly-owned subsidiary of Xunlei, has used blockchain technology in the innovative cloud computing mode - "shared computing"

earlier, Xunlei implanted the concept of sharing economy into the field of cloud computing, and created an original" sharing computing "mode. By collecting users' idle computing resources, Xunlei transformed them into innovative cloud computing services for enterprises, On the one hand, it can effectively solve the social contradiction between the shortage of social computing resources and the high cost of computing, on the other hand, it can greatly rece the operating costs of enterprises. In August 2017, Xunlei launched a new sharing economy intelligent hardware player cloud. Its significance lies in that in the shared computing ecosystem, Xunlei joined the blockchain technology to issue player coins to users who share idle resources such as bandwidth, storage and computing power through the player cloud intelligent hardware

playcoin is a digital asset created based on blockchain technology in the thunderbolt shared computing ecosystem. With the launch of playcoin, Xunlei has become the pioneer of blockchain technology in China, and also has many advantages in its shared computing. Firstly, playcoin, based on shared computing and blockchain technology, ensures that the payment and income of users' shared computing resources and content are equal through smart contracts, which cannot be denied; Secondly, through decentralized accounting records, all transactions are true and transparent; Third, register users' right and modify records through blockchain to protect users' right from infringement

in fact, blockchain technology has strong advantages in network security, cross-border payment and other fields, and also has important value for building a community of destiny in cyberspace. On October 31, 2017, Chen Lei, CEO of Xunlei group and CEO of netxin technology, put forward the all in blockchain strategy and announced that Xunlei will increase investment in blockchain technology starting from the player cloud to explore the application of cloud computing and blockchain technology integration. On the day of the press conference, playmaker cloud also signed a right content distribution agreement with 4K garden, trying to integrate shared computing and blockchain technology to provide a platform for right distribution and content distribution. In the future, blockchain will generate more application scenarios in thunderbolt's shared computing ecosystem. Xunlei's innovative attempt may give more inspiration to developers of other blockchain technology applications

at the same time, as a leading enterprise in the blockchain application market, Xunlei is also actively guiding the healthy development of blockchain applications, insisting on not doing ICO, not going to the third-party trading platform, and severely cracking down on the third-party platform for illegal trading of customer coin, and cracking down on speculation and speculation through such measures as the real name system of customer Coin Wallet. Therefore, blockchain application developers should also abide by the law and avoid risks

based on the blockchain technology, Xunlei's "player cloud" takes the lead in building the C-end application of China's blockchain technology, which promotes China's blockchain technology to participate in the ecological development of global blockchain and creates important value in the development of digital economy“ The development history of the Internet is a history of innovation and Entrepreneurship of Internet talents. " The development of blockchain also needs a lot of talent support. We are looking forward to the birth of "blockchain +" Application in the first domestic blockchain developer competition

2. 99% of them are deceiving. It's deceiving to say how much it will appreciate. It's just a technology, its application is valuable.

3. Introction to seven core technologies of blockchain operation on January 15, 2018
1. Blockchain links
as the name suggests, blockchain is a chain composed of blocks. Each block is divided into block head and block body (including transaction data). The block head includes the prevhash value (also known as hash value) of the previous block used to realize the block link and the random number (nonce) used to calculate the mining difficulty. The hash value of the previous block is actually the hash value of the head of the previous block, and the random number calculation rule determines which miner can obtain the right to record the block
2. Consensus mechanism
blockchain is accompanied by the birth of bitcoin, which is the basic technology architecture of bitcoin. Blockchain can be understood as an Internet-based decentralized accounting system. A decentralized digital currency system like bitcoin requires the consistency of accounting of honest nodes without a central node, which needs blockchain to complete. Therefore, the core of blockchain technology is a consensus mechanism to reach a consensus on the legitimacy of transactions between indivials without mutual trust without central control
there are four main types of consensus mechanisms in blockchain: pow, POS, dpos and distributed consistency algorithm
3. Unlocking script
script is an important technology to realize automatic verification and contract execution on blockchain. Every output of every transaction does not point to an address in the strict sense, but to a script. A script is like a set of rules that constrain how the receiver can spend the asset locked on the output
the validation of transactions also depends on scripts. At present, it depends on two kinds of scripts: Lock script and unlock script. Locking script is a condition added to the output transaction, which is realized by a script language and located in the output of the transaction. The unlocking script corresponds to the locking script. Only when the conditions required by the locking script are met can the assets corresponding to the script be spent, which is located in the input of the transaction. Many flexible conditions can be expressed by script language. Interpretation script is similar to the "virtual machine" in our programming field, which runs in every node of the blockchain network in a distributed way
4. Transaction rules
blockchain transaction is not only the basic unit of a block, but also the actual effective content recorded by the blockchain. A blockchain transaction can be a transfer, or the deployment of smart contracts and other transactions
as far as bitcoin is concerned, a transaction refers to a single payment transfer. The transaction rules are as follows:
1) the input and output of the transaction cannot be empty
2) for each input of a transaction, if its corresponding utxo output can be found in the current transaction pool, the transaction will be rejected. Because the current transaction pool is the transaction not recorded in the blockchain, and each input of the transaction should come from the confirmed utxo. If it is found in the current trading pool, it is Shuanghua trading
3) for each input in a transaction, the corresponding output must be utxo
4) each input unlocking script must verify the compliance of the transaction together with the corresponding output locking script
5. Transaction priority
the priority of blockchain transaction is determined by the blockchain protocol rules. For bitcoin, the priority of a transaction to be included in a block is determined by the time when the transaction is broadcast to the network and the amount of the transaction. With the increase of transaction broadcast time on the network and the increase of transaction chain age, the priority of transaction will be improved and eventually be included by the block. For Ethereum, the priority of the transaction is also related to the transaction fee that the publisher is willing to pay. The higher the transaction fee that the publisher is willing to pay, the higher the priority that the transaction is included in the block
6. Merkle proof
the original application of Merkle proof is bitcoin, which was described and created by Satoshi Nakamoto in 2009. Bitcoin blockchain uses Merkle proof to store transactions in each block. So that the transaction can not be tampered with, but also easy to verify whether the transaction is included in a specific block
7. RLP
RLP (recursive length prefix) is one of the main encoding methods of object serialization in Ethereum. Its purpose is to encode the sequence of arbitrary nested binary data.

4.

Financial instry

blockchain should be the most widely used in the financial instry

, for example, OMG (young model currency) in May 2017, omise announced that it was launching an electronic wallet with Alipay to integrate Alipay payment solutions into its own payment service suite, helping local e-commerce businesses in Thailand to accept online payment transactions from China tourists. p>

another example is PPT, which is a bill financial transaction system based on blockchain

gambling

the gambling instry probably entered the blockchain last year. Why does gambling favor blockchain? Blockchain provides a relatively fair guessing system. Why is it relatively fair? As can be seen from the previous introction, blockchain can not be tampered with or forged

for example, wicc is a rich application scenario that can realize asset issuance, guessing application, right traceability, mutual insurance, decentralized exchange, cross-border settlement, etc

for example, the STX stox application is designed to provide the full functionality of the forecast market application without any central server. Forecasting the market requires functions such as event planning, market making, providing information and analysis to traders, reporting event results, and of course collecting and paying

I believe that if the current lottery instry is set up on the blockchain, people's purchasing enthusiasm will be higher and higher, because too many insiders make people give up

Internet of things

there are still many applications of the Internet of things in the blockchain, because the traceability and timeliness of blocks are very suitable for this instry

for example, data is the concept of Internet of things, which is a decentralized P2P network. The data source can connect with any node in the whole network, and then publish the data, and the network will immediately send it to the subscriber. Horizontal scalability is achieved through fragmentation mode. This is very important for the timeliness and accuracy of Internet of things applications

game instry

for example, GTC (g coin) is a decentralized digital asset based on Ethereum erc20 issued by game.com, and G coin is committed to becoming the general digital currency standard of the global game instry

for example, mana is a distributed shared virtual platform. On this platform, users can browse and discover content, and interact with other people and entities. Users can also claim the ownership of virtual territory through the land ledger based on blockchain. The territory is demarcated by rectangular coordinates (x, y), and its owner can decide the content published on the territory, including interactive systems from static 3D scenes to games

there are many other instries. The great emperor did not list them one by one, but listed several representative instries. What is the point? It shows that blockchain is definitely not only the transaction of currency, it is a proct of the era change with real landing project and real practical use

in fact, the development of human society is just like the blockchain, which is irreversible and unstoppable. In my opinion, sooner or later, the blockchain will enter into thousands of households, no matter the ox or bear, hold the value currency in hand, and tonghuashun has begun to offer digital currency, which shows that the society is accepting it step by step, and the power of social development can not be blocked by any country or person

5. Blockchain technology has the disadvantage of slow transaction speed.

6. 4000-3600 ÷ four thousand × 100%
=400 ÷ four thousand × 100% < br > = 10% < br > A: the average price per square meter was reced by 10% at the opening

7. Mother of all chain (MOAC) blockchain (hereinafter referred to as "moacchain", transliterated as "Moke chain" in Chinese, also known as "the mother of many chains") is an open-source blockchain platform. It supports multiple seed blockchains on P2P network through hierarchical configuration structure. It is developed by the top team of blockchain experts in Silicon Valley, breaking through the asynchronous contract call, asynchronous contract call, and multiple seed blockchains Contract fragmentation processing and cross chain operation are the current instry problems. The expansion capacity and contract processing speed of the platform are far better than the current smart contract platform. It is a blockchain proct that can really deploy commercial applications

the reason for the emergence of Moke is that Ethereum, the hottest smart contract platform at present, has insufficient speed and expansion capacity to meet the needs of a large number of token project applications. Compared with Ethereum's 7-14 transactions per second, Moke can achieve 100 times, even 1000 times under optimized conditions
how is Moke, as an "optimized Ethereum", realized technically<

01 layered verification
first of all, layered verification is adopted. Other systems either insist on pow, or insist on POS, or mix POW + POS, which can not effectively use the advantages of both and avoid the disadvantages of both. We use POW in the physical network and POS in the logical network of the smart contract, so that we can take both advantages into account, which can be called pop (POS over POW)<

02 fragmentation technology
the latest fragmentation concept of Ethereum, the main chain is basically unchanged, and a validator management contract is added to manage sharding interface and allocation. The main chain doesn't care what it looks like in sharding. The main chain only cares about the hash of your header. However, in order to achieve fragmentation in technology, according to the route planning of Ethereum, it will not come out until 2019

compared with Ethereum's single network, Moke has successfully broken through and adopted sharding technology, which can divide Moke into numerous logical subnets, making parallel computing possible, solving a major problem in the instry, greatly improving the processing speed, so as to achieve visa level transaction scale<

03 asynchronous call
Ethereum's synchronous smart contract call, the return of smart contract and block consensus are bound in the same block, resulting in the total amount of smart contract processing limited by block time. Moke adopts asynchronous smart contract call, so that the call and return can cross blocks without block time limit, which greatly increases the number of smart contracts to be processed at the same time

04 cross chain
by crossing blocks through asynchronous smart contracts, Moke can carry out atomic cross chain operation on blockchains with different block generation times, making Moke an underlying blockchain system with cross chain capability. Asynchronous call of smart contract can cross blocks from start to completion, and is no longer limited to one block. This greatly speeds up the throughput of MOAC, and has the function of cross chain of different blockchains

different blockchains have different block generation times. For example, if you set a contract to buy Ethereum erc20 token on the MOAC, you can cross the current block of the MOAC in 5 seconds, and then the contract will wait for Ethereum 25 second block to complete the corresponding transaction through off chain communication, and then complete the transaction in the N + 2 MOAC block. This kind of atomic transaction is completely different from the current transactions completed by various cross chain third-party roles through the establishment of an intermediate escrow account

in the contract, you can also define several confirmation blocks to complete the transaction. Other blockchain systems lack the function of asynchronous call contract, so they can't exchange atoms across chains, which is the advantage of MOAC

05 plug in and verify self built blockchain procts
the new idea means to build a new blockchain. We need to set up servers, develop teams, build communities, attract new users, and so on. We need to spend a lot of money to implement new blockchain ideas. After the inker chain goes online, these ideas can be easily tested on the inker chain, without huge additional costs<

06 never bifurcate
once blockchain procts are deployed and put into proction mode, it is difficult to add / modify / delete functions. Such a modification is either a soft fork or a hard fork. Dealing with bifurcation requires great effort and economic consequences. The architecture mode of Moke chain makes it possible to improve blockchain without bifurcation.

8.

What's the use of Norway's "Doomsday Seed Bank"? Maybe it's the hope of human survival in the future

nowadays, human life on the earth is relatively stable. Have you ever thought about how human beings will survive when the earth encounters an unexpected event in the future? So there is the emergence of the Doomsday Seed Bank. This place stores all the seeds in the world. In order to facilitate the future when the earth encounters an accident, human beings can rely on these seeds to continue to reproce and survive

9. In one sentence, it is decentralization. Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system. In a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography. In a broad sense, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data. Advantages: 1) the algorithm is simple and easy to implement; 2) There is no need to exchange additional information between nodes to reach a consensus; 3) It costs a lot to destroy the system. Disadvantages: 1) waste of energy; 2) It is difficult to shorten the block confirmation time; 3) The new blockchain must find a different hash algorithm, otherwise it will face bitcoin attack; 4) It is easy to proce bifurcation and needs to wait for multiple confirmations; 5) There is never finality, and checkpoint mechanism is needed to make up for it.