世界区块链是什么意思,世界区块链联盟

世界区块链联盟是一个致力于推广应用区块链技术的全球性组织。通过结合技术、社会、政策和经济资源，世界区块链联盟旨在推动区块链技术的有效发展，促进全球经济的可持续发展。

首先，世界区块链联盟致力于推广应用区块链技术，帮助各行业实现数字化转型。通过提供技术支持，世界区块链联盟帮助企业和政府机构实现数字化转型，推广区块链技术在金融、物联网、医疗、教育、文化等行业的应用。

其次，世界区块链联盟致力于推动区块链技术的有效发展，促进全球经济的可持续发展。世界区块链联盟积极参与国际组织和国家机构的技术政策制定，推动建立全球区块链技术标准，支持行业及政府机构构建安全、可靠的区块链基础设施，加速区块链技术的发展。

此外，世界区块链联盟还致力于推动区块链技术在全球范围的应用，建立和支持全球性的区块链应用生态系统。世界区块链联盟还联合各行业企业和政府机构，共同推动区块链技术在全球范围的应用，推动全球经济的可持续发展。

总之，世界区块链联盟是一个致力于推广应用区块链技术的全球性组织，旨在通过结合技术、社会、政策和经济资源，推动区块链技术的有效发展，促进全球经济的可持续发展。世界区块链联盟将继续推动区块链技术的有效发展，助力全球经济的可持续发展。

Ⅰ What is blockchain

[Definition]

Blockchain refers to the collective Technical solutions for maintaining a reliable database. This technical solution allows any number of nodes participating in the system to calculate and record all information exchange data in the system over a period of time into a data block (block) through cryptographic algorithms, and generate the fingerprint of the data block for linking ( chain) and check the next data block, all participating nodes in the system jointly determine whether the record is true.

Blockchain is a general term for technical solutions similar to NoSQL (non-relational database). It is not a specific technology and can be implemented through many programming languages ​​and architectures. There are also many ways to implement blockchain. Common ones currently include POW (Proof of Work), POS (Proof of Stake), DPOS (Delegate Proof of Stake), etc.

The concept of blockchain was first proposed in the paper "Bitcoin: A Peer-to-Peer Electronic Cash System", written by the self-proclaimed Satoshi Nakamoto ( Satoshi Nakamoto). Therefore, Bitcoin can be regarded as the first application of blockchain in the field of financial payments.

[Popular explanation]

No matter how big the system or how small the website, there is usually a database behind it. So who will maintain this database? Under normal circumstances, whoever is responsible for operating the network or system will maintain it. If it is a WeChat database, it must be maintained by Tencent's team, and Taobao's database must be maintained by Alibaba's team. Everyone must think that this approach is natural, but this is not the case with blockchain technology.

If we imagine the database as a ledger: for example, Alipay is a typical ledger, and any change in data is accounting. We can think of database maintenance as a very simple accounting method. The same is true in the world of blockchain. Everyone in the blockchain system has the opportunity to participate in accounting. The system will select within a period of time, maybe within ten seconds, or maybe ten minutes, to select the person with the fastest and best accounting during this period. This person will do the accounting, and he will combine the changes in the database during this period with Changes in the ledger are recorded in a block. We can imagine this block as a page of paper. After confirming that the record is correct, the system will link (chain) the data fingerprint of the past ledger to this paper, and then This piece of paper is sent to everyone else in the entire system. Then the cycle starts over and the system looks for the next person who can do the accounting quickly and well, and everyone else in the system gets a copy of the entire ledger.This means that everyone in this system has exactly the same ledger. This technology is called blockchain technology, also known as distributed ledger technology.

Since everyone (computer) has exactly the same ledger, and everyone (computer) has completely equal rights, the entire system will not be affected by a single person (computer) losing contact or going down. system breakdown. Since there are exactly the same ledgers, it means that all data is open and transparent, and everyone can see the digital changes in each account. Its very interesting feature is that the data in it cannot be tampered with. Because the system will automatically compare, it will consider the account books with the largest number of the same number as the real account books, and the small number of account books with different numbers as others are false account books. In this case, it makes no sense for anyone to tamper with their own ledger, because unless you can tamper with most of the nodes in the entire system. If the entire system has only five or ten nodes, it may be easy to do, but if there are tens of thousands or even hundreds of thousands of nodes, and they are distributed in any corner of the Internet, unless someone can control most of the computers in the world , otherwise it would be unlikely to tamper with such a large blockchain.

II What exactly is blockchain

The most popular concept in 2018 is not blockchain, but Internet giants and startups have expressed their interest , what is blockchain?

Block chain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm, etc. The consensus mechanism is to establish trust and obtain rights and interests between different nodes in the block chain system. Mathematical algorithm.

Block chain is an important concept of Bitcoin. It is essentially a centralized database and the basic technology of Bitcoin. Block chain is a series of data blocks related to cryptography methods. Each data The block contains the information of the Bitcoin network transaction and is used to verify the validity of its information (anti-counterfeiting) and generate the next block.

In a narrow sense, the block chain is a chain that connects data blocks in chronological order. The data structure is an untamperable and unforgeable distributed account book guaranteed by Qinxiao cryptography. Broadly speaking, block chain technology uses the block chain data structure to verify and store data, and uses the distributed node consensus algorithm to generate and update data. , using cryptography to ensure data transmission and access security, and using smart contracts composed of automatic script codes to program and operate new distributed infrastructure and computing methods of data.

Generally speaking, the blockchain system consists of data It consists of layer, network layer, consensus layer, incentive layer, contract layer and application layer. Among them, the data layer includes basic data such as basic data blocks, related data encryption and timestamps, and the network layer of the basic algorithm includes distributed The consensus layer such as network mechanism, data dissemination mechanism and data verification mechanism mainly packages the incentive layer of various consensus algorithms of network nodes and integrates economic factors into the blockchain technology system, mainly including the issuance mechanism and distribution mechanism of economic incentives. The contract layer mainly Packaging various scripts and algorithmsand smart contracts, which are the basis of the programmable features of the blockchain. The model's chain block structure based on timestamps, consensus mechanism of distributed nodes, economic incentives for consensus computing power, and flexible programmable smart contracts are the most representative of blockchain technology. The innovation point.

Blockchain is currently divided into three categories, which are detailed in the book "Blockchain: Defining the New Structure of Future Finance and Economy" issued by Currency. Among them, hybrid blockchain and private blockchain can be considered It is a broad private chain:

Public blockchain

Public blockchain means that any individual or group in the world can send transactions, and the transactions can be effectively confirmed by the blockchain. Anyone can participate in the consensus process. The public blockchain is the earliest blockchain and the most widely used blockchain at present. The virtual digital currencies of the major bitcoin series are based on the public blockchain. There is only one blockchain corresponding to this currency in the world. .

United (Industry) Blockchain

Industry Blockchain: A group designates multiple preselected nodes as accountants, and the generation of each block is jointly decided by all preselected nodes (preselected nodes Participate in the consensus process), other access nodes can participate in transactions, but asking about the accounting process (essentially management accounting, just distributed accounting, how many pre-selected nodes, how to decide the accounting personnel of each block becomes the main risk point of the blockchain), Others can perform limited queries through the open API of the blockchain

Private blockchain

Ⅲ What is "Blockchain Cat Raising" and how to play it (very detailed tutorial)< /p>

This time, cats meow another climax in the blockchain world.

In a few days, "blockchain cat raising" has become a hot topic in the currency circle.

CryptoKitties is the first virtual pet game that uses blockchain technology and runs on the Ethereum network.

Her appearance has a certain historical significance, and it has now become the most popular project on the Ethereum blockchain, once accounting for 20% of the entire Ethereum traffic. The market has reached millions of dollars in transaction volume and is still growing rapidly...

The concept is simple. You use Ethereum to buy a cat. Each cat is unique. As long as you don't sell it, it is 100% owned by you and cannot be copied or destroyed.

The fun part is that you can go to the market to find cats to breed with, or you can buy a cat, match two of them, and the resulting kitten will be yours.

Each kitten extracts a certain sequence from its parents and combines it. Whether it is coat color, markings, pupils, hairstyle, expression, tail and other characteristics, they are all random. There are 4 billion types in total. Possibility of change. Then you can sell your cat on the market, and you set the price yourself.

One more thing, every 15 minutes,A gen 0 genesis cat will be born, and its price is equivalent to the average price of the latest 5 cats sold, plus an increase of 50%. Of course, Genesis cats are very popular. After all, they are virgins and they give birth to kittens the fastest.

Isn’t this a bit like our story of chickens laying eggs and eggs laying chickens, and our descendants are endless?

Of course, having a baby takes time.

The birth of a kitten has always been from fast to slow~slow~slow~, and the gap ranges from one minute to a week.

The shorter the time it takes for your cat to give birth, the better. This allows the newborn CryptoKitties to be sold quickly and continue to breed. This also means an increase in income.

The more babies you have, the longer the cat’s cooldowns will take, and the birth rate will also slow down.

Another interesting thing is that giving birth to kittens is a complex and random breeding system, which means that there are always some mutant attributes (attributes) appearing in it, and these become collectibles or in-demand items. .

1. Enter the official website of CryptoKitties: cryptokitties.co and click sign in to jump to the registration page. You need to install the Ethereum light wallet MetaMask plug-in on your chrome or firefox browser. (This process needs to be learned. There are three ways here. Do it as you like, guest. Password: 1rjo)

2. Click on the Mertamask plug-in to install it.

3. Accept the terms and enter your password.

4. You must remember the generated 12 English word passwords. Save it together with the jason file.

5. Then the wallet creation is completed. Enter the cryptokitties.co website to see your account, set your name, email, etc.

Method 1: If you have ETH in other Ethereum wallets, such as imtoken, you can directly transfer it to your CryptoKitties address.

Method 2: Two of the three OTC Bitcoin exchanges mentioned in this article: Coincola and bitcoinworld both support ETH transactions, and you can also transfer them directly.

Method 3: It is the coinbase recommended by Matamask, but it shows US only.

1.Go to the marketplace to find the cat you like (pictured below).

2. After you like it, click buy now.

The details page shows the cat’s detailed information, serial number, and price trend chart (price over time in 1 day or 2 days) Continue to increase or decrease), the price to buy now, and the cooling time for giving birth to kittens, etc.

3. After clicking ok, buy this kitty, matamask will pop up to display the detailed estimated cost. If there are no results, maybe your mining fee is not enough, or the cat is sold. Try more. The max transaction fee shows the maximum transaction fee, which is generally not reached. Just wait for the transaction to be completed after the summit. To cancel the transaction, click reject.

During the transaction process, you can click on the transaction to enter https://etherscan.io to view the details. Or view historical transaction information on the ECG-like icon on the right side of the website.

4. Transaction successful! Congratulations, you have your first virtual cat. How to make more?

One way, life.

Pair up two by two. There is also a transaction fee for giving birth to kittens. The speed of birth depends on the speed of the parents.

Breed kitty gives birth to kittens;

Sell kitty sells kittens

Gift kitty gives kittens to friends

Another way is to rent.

Sire to the public, which means renting out your cat as a male cat, setting the initial price and end price and date, and acting as a sperm bank.

sire to my kitties means letting your two cats XXOO have kittens.

The final way is to sell.

When a kitten is born, you will be notified by email. You can choose to sell, set the price and then sell.

If someone buys it, you will be notified by email.

Okay, let’s be cat slaves happily~

Original text: http://li-wu.net/how-to-cryptokitties.html

IV What is blockchain and how was it born? What are the types of blockchain?

If you want to understand blockchain, You must first understand the basic structure of the program. Everything we see on the Internet is constructed through computer language. There are many kinds of computer languages, but the most basic characters that make up the language are codes, and blockchain technology is a way of applying codes, which is different from traditional centralization. The difference between the models is that the blockchain has the characteristics of immutability, privacy, security, and consensus.

There are many application scenarios for blockchain. The most successful case so far is Bitcoin, followed by electronic invoices, cross-border payments, etc. Based on the interoperability of data, it is impossible to With characteristics such as tampering, it can also be used to save some important data. As long as this data uses blockchain technology as the underlying technology, it can never be destroyed and will be saved forever. No person or institution has the ability to modify or delete it. In addition, there are certain intersections between blockchain payment and education, medical care, credit reporting, automobiles, transportation and other fields. It is a technology, not a certain product, so there is only one type of it, but with the application As the scene changes, its role is also different. It can be integrated with existing scenes in almost any field and then derive other applications.

IV How to explain what blockchain is?

Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. The so-called consensus mechanism is a mathematical algorithm that establishes trust and obtains rights and interests between different nodes in the blockchain system
[1]
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Blockchain is an important concept of Bitcoin. It is essentially a decentralized database and serves as the underlying technology of Bitcoin. The blockchain is a series of data blocks generated using cryptographic methods. Each data block contains information about a Bitcoin network transaction and is used to verify the validity of its information (anti-counterfeiting) and generate the next block.
Let’s talk about the social or economic significance of blockchain. Many technologies in the past were actually dedicated to "productivity", such as artificial intelligence, which is an advancement in productivity. The blockchain has greatly improved production relations and is dedicated to production relations. So why do you say that?
Because the so-called production relations are actually how business is done between people and business partners. And these things are originally in the process of people's mutual cognition, and no special procedures are used to program or quantify them.
For example, if you and I are good friends now, we can do business. If someone provokes our relationship and we are no longer good friends, we will not do business. Even if we can make money by doing business, we will not do it. , because everyone no longer has any trust in each other.
As for blockchain, it is actuallySince the data has been authenticated by various nodes and backed up at the same time, my data is as authentic as possible and cannot be tampered with. In this case, if you trust my data, you can do a program programming on this basis. , and then program the "production relations" of what kind of business contracts and business cooperation this data can be used for. In this way, everyone believes in the data and the program compiled by the algorithm. And because you believe in the data and the program, you can develop various APPs based on this program. These APPs are the relationship of production and what kind of business you are going to do. This is: Blockchain is actually a reconstruction of "production relations".

VI What is Blockchain

When designing the Bitcoin system, Satoshi Nakamoto creatively combined computer computing power competition with economic incentives to form proof of work (proof -of-work (POW) consensus mechanism, allowing mining computer nodes to complete currency issuance and accounting functions in computing competition, and also complete the operation and maintenance of blockchain ledgers and decentralized networks. This forms a complete cycle: mining with mining machines (competition for computing power), completing decentralized accounting (operating the system), and obtaining economic incentives in the form of Bitcoin (economic rewards).

Bitcoin’s proof-of-work consensus mechanism is a layer that connects upper-layer applications and lower-layer technologies: the layer above it is the issuance, transfer, and anti-counterfeiting of electronic cash; the layer below it , the nodes of the decentralized network reach a consensus and update the distributed ledger.

When discussing the present and future of blockchain, we will constantly return to the design of the Bitcoin system. It is a simple and exquisite system that integrates technical and economic factors. The source of all innovation in the blockchain.

The definition of blockchain

At this point, I believe readers can roughly understand what blockchain is. Finally, let us explain blockchain from different perspectives. Let’s define it.

The first definition of blockchain (relatively popular)

Bitcoin: an encrypted digital currency; blockchain: a basic technology.

Blockchain is an underlying technology derived from “Bitcoin”. In other words, Bitcoin is the first wildly successful application of blockchain technology.

The second definition of blockchain

Blockchain is a technology for “value representation” and “value transfer” in the digital world. One side of the blockchain coin is an encrypted digital currency or token that represents value, and the other side is a distributed ledger and decentralized network for value transfer.

Distributed ledgers and decentralized networks are also often called “chains” and can be viewed as a software platform; And the token that represents the value is often called a "coin".

The token is stored on the chain and managed through the code on the chain (the main form of smart contract), which is programmable.

What is blockchain