目前应用最广泛的区块链是

目前应用最广泛的区块链是拓展，其中最重要的三个关键词是：区块链、智能合约、去中心化。

首先，区块链是一种分布式账本技术，它被设计用来存储和管理数字资产。它是一种去中心化的数据结构，由一系列的区块组成，每个区块都包含了一定数量的交易数据。它可以用来记录比特币、以太坊以及各种其他加密货币的交易信息，也可以用来存储企业的金融信息、供应链信息以及其他类型的数据。区块链的优势在于它可以提供高度安全的数据存储，并且不受任何中心化机构的控制。

其次，智能合约是一种可以在区块链上执行的计算机程序，它可以实现自动执行的功能。智能合约可以实现自动执行的功能，这意味着只要满足一定的条件，它就可以自动执行指定的操作。例如，在金融行业，智能合约可以自动执行货币交易，确保交易双方都能得到满意的结果。此外，智能合约还可以用来实现供应链自动化，以及实现社交媒体等其他功能。

最后，去中心化是区块链技术的一个重要特性。去中心化的意思是没有任何中心机构可以控制区块链网络，所有的节点都是平等的。这意味着每个节点都可以在网络上发起交易，而不用担心被中心机构拒绝或者控制。此外，去中心化还意味着数据的安全性和完整性可以得到很好的保证，因为每个节点都可以看到网络上的所有数据。

总之，区块链、智能合约和去中心化是目前应用最广泛的区块链技术拓展的三个关键词，它们可以极大地提高数据安全性、完整性和可靠性，并且可以为企业提供更灵活的业务流程。

㈠ Is there any more detailed explanation of blockchain applications?

Blockchain applications include mathematical currency, payment and settlement, digital bills, proof of rights and interests, and bank credit reporting
A detailed explanation of each application is as follows:
1. Digital Currency
At present, the most extensive and successful application of blockchain technology is the digital currency represented by Bitcoin. Digital currency has developed rapidly in recent years. Due to the characteristics of decentralized credit and frequent transactions, it has a high transaction value and can maintain a relatively stable price through the development of hedging financial derivatives as a quasi-super-sovereign currency. Digital currency has established digital currency transaction credit backed by sovereign currency. The greater the transaction volume and the more frequent transactions, the stronger the digital currency transaction credit foundation. Once the blockchain credit system is implemented globally, digital currency will become a gold-like global payment credit.
2. Payment and settlement
At this stage, settlement and payment of commercial trade transactions all rely on banks. This traditional method of conducting transactions through intermediaries requires the account opening bank, counterparty bank, central bank, and overseas bank. In this process, each institution has its own accounting system, needs to establish an agency relationship with each other, and needs a credit line; each transaction needs to be recorded in its own bank, and must also be cleared and reconciled with the counterparty, resulting in Transactions are slow and costly. Compared with the traditional payment system, blockchain payment is carried out directly by both parties to the transaction without involving intermediaries. Even if part of the network is paralyzed, it will not affect the operation of the entire system. If a universal distributed inter-bank financial transaction protocol is built based on blockchain technology to provide users with cross-border, real-time payment and clearing services in any currency, cross-border payments will become convenient and low-cost.
Take cross-border exchange as an example. If I open an account in a small bank in my country and transfer money to another small bank abroad, the transfer process under the traditional SWIFT system requires the following steps: First, I send money to the small bank to which I belong. Banks submit applications; second, small banks submit applications to large banks in the same country that have signed exchange terms; third, large banks wire transfers to overseas cooperative banks; fourth, cooperative banks remit funds to small overseas banks. Currently, the process takes anywhere from 10 minutes to two days, depending on the country. If you use blockchain-based settlement technology and place an order at a market maker while remitting RMB, a trading bank participating in the system in the world will receive the order, and the two parties will shake hands to complete the exchange. The average payment confirmation speed will be in a few seconds. Within seconds.
3. Digital bills
Digital bills are a brand-new bill presentation form developed by combining blockchain technology with bill attributes, regulations, and markets. It is completely consistent with the technical architecture of the existing electronic bill system. different. The core advantages of digital bills are mainly reflected in: First, the disintermediation of the value transfer of bills. In traditional bill transactions, bill intermediaries often use information differences to match. After point-to-point transactions are realized with the help of blockchain, bill intermediaries will lose their intermediary functions and reposition their identities. The second is to effectively prevent bill market risks.Due to the blockchain's non-tamperable timestamps and the fact that it is open to the entire network, once a transaction is made, there will be no default, thus avoiding the problems of "one ticket selling more" for paper tickets and the out-of-sync payment and endorsement of electronic tickets. Third, the system construction and data storage do not require a central server, eliminating the development costs of central applications and access systems, reducing the maintenance and optimization costs of the system under the traditional model, and reducing the risks caused by system centralization. The fourth is to standardize market order and reduce regulatory costs. The non-tamperable timestamp formed by the continuous connection of blockchain data greatly reduces the cost of regulatory review. The completely transparent data management system provides a trustworthy traceability path, and shared constraints can be established in the chain for regulatory rules through programming. code to achieve full coverage and hard control of regulatory policies.
4. Proof of Rights and Interests
Every node participating in the maintenance of the blockchain can obtain a complete data record. Using the characteristics of the blockchain's reliability and collective maintenance, the rights of the owners of rights and interests can be confirmed. For the need to store permanent records, blockchain is an ideal solution and is suitable for scenarios such as land ownership and equity transactions. Among them, proof of equity is the field with the most applications currently. Equity owners can prove their ownership of the equity with their private keys. When the equity is transferred, it is transferred to the next owner through the blockchain system. The property rights are clear and the records are clear. The entire process does not require the involvement of a third party.
During a keynote address at the 2015 European Financial Journalism Awards for Excellence in Trading Technology in London, Nasdaq CEO Bob Greifeld announced that the exchange intends to use blockchain technology to manage its proxy voting system. Proxy voting is an important and time-consuming operation used by a listed exchange. The application of blockchain technology can allow shareholders to vote without having to attend the company's annual meeting. People can vote using their mobile phones, and Always keep voting records. Blockchain technology is regarded as an advanced technology in the field of equity trading that can ensure transparent transactions in a shorter time.
5. Bank Credit Reference
At present, when developing commercial bank credit business, whether it is for enterprises or individuals, the most basic consideration is the financial credit of the borrower itself. Each bank uploads the repayment status of each borrower to the central bank's credit reference center. When inquiries are needed, the bank will download the reference from the central bank's credit reference center with the customer's authorization. There are problems such as incomplete information, inaccurate data, low usage efficiency, and high usage costs. In this field, the advantage of blockchain is that it relies on program algorithms to automatically record massive information and store it on every computer in the blockchain network. The information is transparent, difficult to tamper with, and has low cost of use. Commercial banks store and share customers' credit status in their own institutions in an encrypted form. When applying for a loan, customers do not have to go to the central bank to apply for a credit check, that is, decentralization. The lending institution can retrieve the corresponding information data from the blockchain. Complete all credit reporting work.
In short, blockchain has become one of the hot spots of innovation in the financial industry. However, as a new technology, blockchain also has considerable risks.risk. The current settlement system based on blockchain technology is very sensitive to regulatory risks. If participants are worried about the uncertainty of regulatory policies, it may cause the payment system to collapse due to instability. In addition, since its operating rights are controlled by developers, the obvious technical disadvantage is that if the operator itself controls more than 51% of the computing power of the entire network, it can achieve double payment, leading to a breakdown of trust. This is also an important issue that needs to be solved during the application of blockchain technology.

㈡ Classification of blockchains

Currently blockchains are divided into three categories, among which hybrid blockchains and private blockchains can be regarded as: generalized private chains, public blocks chain public blockchain. This means that any individual or group in the world can send transactions, the transactions can be effectively confirmed by the blockchain, and anyone can participate in its consensus process. Public blockchain is currently the earliest blockchain and the most widely used blockchain. Each virtual digital currency of the Bitcoin series is based on a public blockchain, and there is only one blockchain in the world corresponding to this currency.
Extended information
1. Industrial blockchain industry blockchains: multiple pre-selected nodes in the group are designated as bookkeepers, and the generation of each block is jointly decided by all pre-selected nodes (pre-selected nodes participate in the consensus process), others Access nodes can participate in transactions but do not interfere with the accounting process (essentially, it is managed bookkeeping, but it becomes distributed bookkeeping). How many pre-selected nodes and how to determine the bookkeeper for each block become the main risk points of the blockchain ), anyone else can make limited queries through the blockchain’s open API. Private Blockchain Private Blockchain ((privateblockchains)): Only the general ledger technology of the blockchain is used for accounting. It can be a blockchain with exclusive written permission from a company or individual. This chain is not much different from other distributed storage solutions. At present (December 2015), conservative giants (traditional finance) want to try private blockchains, while the applications of public chains, such as Bitcoin, have been industrialized, and the application products of private chains are still being explored. Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. Blockchain is an important concept of Bitcoin. Essentially, it is a decentralized database.
2. At the same time, as the underlying technology of Bitcoin, it is a series of data blocks associated with encryption methods. Each data block contains a batch of Bitcoin network transaction information, verify the validity of its information (anti-counterfeiting) and generate the next block. In fact, the word blockchain does not appear in the original English Bitcoin white paper, but appears in blockchain. In the earliest Bitcoin white paper, blockchain was translated as blockchain. This is the time when the Chinese word "blockchain" first appeared. The Cyberspace Administration of China issued the "Blockchain Information Service Management Regulations" on January 10, 2019, which came into effect on February 15, 2019. In a narrow sense, blockchain is a chain of data that combines blocks of data in chronological orderstructure, and a tamper-proof and forgeable distributed ledger guaranteed by cryptography. Broadly speaking, blockchain technology is a new distributed infrastructure and computing method that uses blockchain data structures to verify and store data, distributed node consensus algorithms to generate and update data, and cryptography to Ensure the security of data transmission and access, using smart contracts composed of automated script code to program and operate data.

㈢What are the application fields of blockchain?

What are the application fields of blockchain? Introduction to the Blockchain Application Industry
As we all know, blockchain is very popular now. It is a shared distributed database technology. Blockchain technology will have very good results in different industries with its remarkable characteristics. Development prospects, so what are the application areas of blockchain?
Blockchain Applications
1. Digital Currency: At present, the most extensive and successful application of blockchain technology is the digital currency represented by Bitcoin. Digital currency has developed rapidly in recent years. Due to the characteristics of decentralized credit and frequent transactions, it has a high transaction value and can maintain a relatively stable price through the development of hedging financial derivatives as a quasi-super-sovereign currency. Since the emergence of Bitcoin, hundreds of digital currencies have appeared one after another, and a relatively large industrial chain ecosystem has been formed around the generation, storage, and transactions of digital currencies. Taking Bitcoin as an example, participating institutions can be mainly divided into four categories: infrastructure, trading platforms, ICO financing services, and comprehensive blockchain services.
2. Financial application: Blockchain has inherent advantages in the financial field. On the Internet, this is determined by the genes of blockchain. From a subjective point of view, financial institutions are the most willing to explore blockchain applications and need new technologies to improve operational efficiency and reduce costs to cope with the current status of the entire global economy. Objectively speaking, the market space in the financial industry is huge, and a little progress can bring huge benefits. The financial industry is an industry with extremely high requirements for security and stability. If the application of blockchain in the financial field is verified, it will have a huge demonstration effect and be quickly promoted in other industries. In the financial field, in addition to digital currency applications, blockchain has gradually begun to be applied in cross-border payments, supply chain finance, insurance, digital bills, asset securitization, bank credit reporting and other fields.
(1) Insurance business: With the development of blockchain technology, personal health status, accident records and other information may be uploaded to the blockchain in the future, allowing insurance companies to be more timely and timely when customers apply for insurance. Accurately obtain risk information to reduce underwriting costs and improve efficiency. The shared and transparent characteristics of the blockchain reduce information asymmetry and the risk of adverse selection; while its historical traceability characteristics are conducive to reducing moral hazard, thereby reducing the difficulty and cost of insurance management.
(2) Asset securitization: The business pain point in this field lies in the fact that the authenticity of the underlying assets cannot be guaranteed; there are many participating entities and multiple operating links, low transaction transparency, information asymmetry and other issues, resulting in risk difficulties.To control. The pain point of data lies in the low efficiency of transfers between participants, the clearing and reconciliation of funds between parties’ trading systems often requires a lot of manpower and material resources, and there are multiple online and offline channels for asset repayment, making it impossible to monitor the true status of assets, and there are still assets After the package is formed, the trust of all parties in the transaction chain in the authenticity and accuracy of the underlying asset data is an issue.
(3) Digital tickets: The pain points in this field lie in three risk issues. Operational risk: Due to the centralization of the system, once there is a problem with the central server, the entire market will be paralyzed; market risk, according to statistics, in 2016, there were seven risk events involving hundreds of millions of dollars, involving multiple banks; moral hazard , there are incidents such as "one ticket selling more" and false commercial bills in the market. Blockchain's disintermediation, system stability, consensus mechanism, and non-tampering characteristics reduce operational risks, market risks, and moral risks in traditional centralized systems.
(4) Cross-border payment: The pain points in this field are long payment cycle, high fees and low transaction transparency. The third-party payment company is the center to complete the accounting, settlement and liquidation in the payment process, and the payment cycle is long. For example, the payment cycle for cross-border payments is more than three days, and the cost is high. The blockchain is deintermediated, the transactions are open, transparent and cannot be tampered with. There is no third-party payment institution to join, which shortens the payment cycle, reduces fees and increases transaction transparency.
(5) Credit information management: The pain points in this field are the lack of data sharing, information asymmetry between credit information agencies and users; formal market-oriented data collection channels are limited, and the battle for data sources consumes a lot of costs; data privacy protection issues are prominent , the traditional technical architecture is difficult to meet new requirements, etc. In the field of credit reporting, blockchain has the characteristics of decentralization, trustlessness, timestamps, asymmetric encryption and smart contracts. At the technical level, it ensures that limited and controllable credit can be achieved on the basis of effectively protecting data privacy. Data sharing and verification.
(6) Supply chain finance: The pain points in this field are the long financing cycle and high costs. Centered on the core enterprise system of the supply chain, it is difficult for third-party credit enhancement institutions to authenticate the authenticity of various relevant vouchers in the supply chain, resulting in long manual review times and high financing costs. The blockchain's deintermediation, consensus mechanism, and non-tampering characteristics eliminate the need for third-party credit enhancement agencies to verify the authenticity of various relevant certificates in the supply chain, reducing financing costs and shortening the financing cycle.
(7) Asset securitization: The business pain point in this field lies in the fact that the authenticity of the underlying assets cannot be guaranteed; there are many participating entities, multiple operating links, low transaction transparency, and information asymmetry, making it difficult to control risks. The pain point of data lies in the low efficiency of transfers between participants, the clearing and reconciliation of funds between parties’ trading systems often requires a lot of manpower and material resources, and there are multiple online and offline channels for asset repayment, making it impossible to monitor the true status of assets, and there are still assets After the package is formed, the trust of all parties in the transaction chain in the authenticity and accuracy of the underlying asset data is an issue. Blockchain disintermediation, consensus mechanism, non-tampering characteristics, and increased dataCirculation efficiency, cost reduction, real-time monitoring of the true status of assets, and ensuring the trust of all parties in the transaction chain in the underlying assets.
3. Blockchain + Industry Application:
As the application of blockchain technology in the financial field continues to be verified, its technical advantages are gradually showing value in other industries. At present, blockchain application projects are gradually being implemented in fields such as medical and health, IP copyright, education, culture and entertainment, communications, charity, social management, sharing economy, and the Internet of Things, and "blockchain+" is becoming a reality.
(1) Blockchain + Medical: In the medical field, blockchain can use its anonymity, decentralization and other characteristics to protect patient privacy. Electronic health records (EHR), DNA wallets, drug anti-counterfeiting, etc. are all possible application areas of blockchain technology. IBM predicted in last year's report that 56% of medical institutions around the world will invest in blockchain technology by 2020.
(2) Blockchain + Internet of Things: The Internet of Things is a very broad concept. If communications, energy management, supply chain management, sharing economy, etc. are included, the Internet of Things application of blockchain technology will has become a very important application field.
(3) Blockchain + IP copyright & cultural entertainment: The Internet is developing better and better, and digital music, digital books, digital videos, digital games, etc. have gradually become mainstream. The rise of the knowledge economy has made intellectual property rights a core element of market competition. However, intellectual property infringement is serious in the current Internet ecosystem, and the copyright protection of digital assets has become a pain point in the industry. Blockchain has the characteristics of disintermediation, consensus mechanism, and non-tampering. Blockchain technology can effectively integrate all aspects of the cultural and entertainment value chain, accelerate circulation, and shorten the value creation cycle; at the same time, the value of digital content can be realized Transfer, and ensure that the transfer process is credible, auditable and transparent, effectively preventing piracy and other behaviors.
(4) Blockchain + Public Services & Education: In the fields of public services, education, charity and public welfare, issues such as file management, identity (qualification) certification, and public trust all exist objectively. The traditional method is to rely on A credible third party provides credit endorsement, but problems such as fraud and deficiencies still exist. Blockchain technology can ensure the integrity, permanence and unchangeability of all data, and thus can effectively solve the difficulties and pain points in these industries in terms of certificate storage, tracking, association, and backtracking.

㈣ What are the applications of blockchain technology?

Blockchain has become so popular, so what are the application fields of blockchain?

At present, the most extensive and successful application of blockchain technology is the digital currency represented by Bitcoin. Digital currency has developed rapidly in recent years. Due to the characteristics of decentralized credit and frequent transactions, it has a high transaction value and can maintain a relatively stable price through the development of hedging financial derivatives as a quasi-super-sovereign currency.

Financial institutions are the most willing to explore blockchain applications and need newTechnology to improve operational efficiency and reduce costs to cope with the current status of the entire global economy. Objectively speaking, the market space in the financial industry is huge, and a little progress can bring huge benefits. The financial industry is an industry with extremely high requirements for security and stability. If the application of blockchain in the financial field is verified, it will have a huge demonstration effect and be quickly promoted in other industries. In the financial field, in addition to digital currency applications, blockchain has gradually begun to be applied in cross-border payments, supply chain finance, insurance, digital bills, asset securitization, bank credit reporting and other fields.

As the application of blockchain technology in the financial field continues to be verified, its technical advantages are gradually showing value in other industries. At present, blockchain application projects are gradually being implemented in fields such as medical and health, IP copyright, education, culture and entertainment, communications, charity, social management, sharing economy, and the Internet of Things, and "blockchain" is becoming a reality.

(1) Blockchain medical care: In the medical field, blockchain can use its anonymity, decentralization and other characteristics to protect patient privacy. Electronic health (EHR), DNA wallet, drug anti-counterfeiting, etc. are all possible application areas of blockchain technology. IBM predicted in last year's report that 56% of medical institutions around the world will invest in blockchain technology by 2020.

(2) Blockchain Internet of Things: The Internet of Things is a very broad concept. If communications, energy management, supply chain management, sharing economy, etc. are included, the Internet of Things with blockchain technology Application will become a very important application field.

(3) Blockchain IP copyright & cultural entertainment: Since the Internet became popular, digital music, digital books, digital videos, digital games, etc. have gradually become mainstream. The rise of the knowledge economy has made intellectual property rights a core element of market competition. However, intellectual property infringement is serious in the current Internet ecosystem, and the copyright protection of digital assets has become a pain point in the industry. Blockchain has the characteristics of disintermediation, consensus mechanism, and non-tampering. Blockchain technology can effectively integrate all aspects of the cultural and entertainment value chain, accelerate circulation, and shorten the value creation cycle; at the same time, the value of digital content can be realized Transfer, and ensure that the transfer process is credible, auditable and transparent, effectively preventing piracy and other behaviors. Blockchain Public Services & Education: In the fields of public services, education, closed-door charity and public welfare, issues such as file management, identity (qualification) certification, and public trust all exist objectively. The traditional method is to rely on third parties with credibility. The company makes credit endorsements, but problems such as fraud and deficiencies still exist.

㈤ What are the current physical applications of blockchain

Newton community economy
1) Users own data: Users enrich their personal data through cryptography Technology completely controls personal data and ultimately forms personal credit. The value created through user data requires payment to users in a pre-agreed manner.
2) A more effective incentive method: Use technology protocols to replace commercial intermediaries, throughVarious roles such as value-added Internet service providers and consumers are directly connected together, and the transaction costs of service providers are directly allocated to the corresponding contributors through technical means.
3) New organizational forms and collaboration methods: Community economies managed by non-profit foundations replace monopoly platforms managed by traditional profit-making companies. Each contributor obtains the rights and interests of the economy and becomes part of the economy in accordance with the principles of fairness, reasonableness, and transparency.

㈥ What are the current application fields of blockchain?

Financial field

Blockchain is widely used in financial services such as international exchange, letters of credit, equity registration and stock exchanges. The field has potential huge application value. The application of blockchain technology in the financial industry can eliminate the need for third-party intermediaries and achieve direct point-to-point connection, thereby greatly reducing costs and quickly completing transaction payments.

Internet of Things and Logistics Fields

Blockchain can also be naturally combined in the Internet of Things and logistics fields. Through blockchain, logistics costs can be reduced, the production and delivery process of items can be traced, and the efficiency of supply chain management can be improved. This field is considered a promising application direction of blockchain.

Public services

Blockchain is closely related to people’s production and life in public management, energy, transportation and other fields, but these The centralized nature of the field also brings some problems, which can be transformed with blockchain. The decentralized, fully distributed DNS service provided by the blockchain can realize domain name query and resolution through point-to-point data transmission services between various nodes in the network, and can be used to ensure that the operating system and firmware of an important infrastructure are not Tampered, you can monitor the status and integrity of the software, detect bad tampering, and ensure that the data transmitted by systems using IoT technology has not been tampered with.

Digital copyright field

Through blockchain technology, works can be authenticated, proving the existence of text, video, audio and other works, and ensuring the authenticity and uniqueness of ownership. After the rights of the work are confirmed on the blockchain, subsequent transactions will be recorded in real time, realizing full life cycle management of digital copyright, and can also be used as a technical guarantee in judicial evidence collection.

Insurance field

In terms of insurance claims, insurance institutions are responsible for fund collection, investment, and claims settlement, and often have high management and operating costs. Through the application of smart contracts, there is no need for the policy holder to apply or the insurance company to approve it. As long as the claim settlement conditions are triggered, the insurance policy can automatically settle claims.

Public Welfare Field

The data stored on the blockchain is highly reliable and cannot be tampered with, so it is naturally suitable for use in social welfare scenarios. Relevant information in the public welfare process, such as donation projects, fundraising details, fund flows, recipient feedback, etc., can be stored on the blockchain and transparently and publicly disclosed conditionally to facilitate social supervision.

㈦ In addition to Hash World, the currently popular blockchain games areNetEase Planet, Baidu Leitz Dog, what else

Xiaomi Rabbit, 360 Cat.

Blockchain is a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained".

Types

1. Public blockchain

Public blockchain refers to: any individual or group in the world can Send a transaction, and the transaction can obtain valid confirmation from the blockchain, and anyone can participate in its consensus process. The public blockchain is the earliest blockchain and the most widely used blockchain. The virtual digital currencies of all major bitcoins series are based on the public blockchain. There is only one blockchain corresponding to this currency in the world. .

2. United (industry) blockchain

In the industry blockchain, multiple pre-selected nodes are designated as bookkeepers within a certain group, and each block is generated by all The pre-selected nodes jointly decide (the pre-selected nodes participate in the consensus process). Other access nodes can participate in transactions, but anyone else who does not participate in the accounting process can make limited inquiries through the open API of the blockchain.

3. Private blockchain

Private blockchain only uses the general ledger technology of the blockchain for accounting. It can be a company or an individual and has exclusive access to the area. The write permission of the blockchain is not much different from other distributed storage solutions. Traditional finance is trying to experiment with private blockchains, while applications of public blockchains such as Bitcoin have been industrialized, and application products of private blockchains are still being explored.

What are the applications of blockchain industry?

Taking the tourism industry as an example, blockchain applications are mainly concentrated in travel, travel community reviews, digital identity management, credit consumption management, Tracking pilots' professional certificates and qualifications, hotel and airline loyalty programs, reservation management, and consumer points management are several application areas. In addition, with the development of blockchain, many related top domain names have been registered, which has had a relatively large impact on the domain name industry. In addition, blockchain also has applications in finance, games, entertainment and other fields.

㈨ Which fields are suitable for blockchain to be used in?

The first one is the information security industry.
The second one is the bill business field
The third one is the payment and settlement business.
Fourth, identity/account authentication business.
Fifth, each node participating in the maintenance of the equity proof blockchain can obtain a complete data record. Using the characteristics of reliable and collective maintenance of the blockchain, the rights of the owners of equity can be confirmed.
Blockchain technology is really powerful. With the advancement of the times, this technology may change the development direction and trend of the financial industry, and because the blockchain technology itself has large capacity, high-speed computing, security, and convenience And other characteristics have laid a strong foundation for the advancement and popularization of technology.

㈩ Teach you step by stepIssuing Tokens

Currently, the most widely used tokens (blockchain currencies) are ERC20 tokens issued on Ethereum. ERC20 can be regarded as a smart contract. This smart contract keeps track of who owns how many tokens and includes some token transfer functions. If the token smart contract you write complies with the ERC20 standard, your token is called an ERC20 token.

Many concepts similar to ERC20 can seem complicated when you just listen to people talking about them. In fact, the easiest way to understand is to implement it yourself.

An ERC20 token is a smart contract, which records account token balance data and method functions for transferring tokens. Smart contracts can be tested in a test environment before deploying them on Ethereum. There are some Ethereum test networks available. We chose the Rinkeby network for this currency issuance experiment.
1. In the metemask wallet of Chrome browser, select the rinkeby test network.

Send a Post on Facebook, the content is the currency receiving address, which is the account address of the metamask wallet. The post is set to public. Right-click the posting time, copy the link, and fill it in Rinkeby Faucet. Choose to borrow 3 ETH, the usage period is 8 hours, and you can get the 3 ETH after waiting for a while.

You can also see that the ETH has arrived in the metamask wallet.

3. Now that we have the money and wallet, let’s start writing the currency issuance smart contract. We choose the Remix online development platform. There are a lot of cases for ERC20 tokens that you can refer to, just borrow them.

After compiling the smart contract, Run it to fly.

Here you need to fill in some configuration information. Select "Web3" for the Environment running environment because we are using the metamask wallet; fill in the metamask wallet account for the Account account; fill in the upper limit of the Gas limit transaction fee. It doesn't matter if you fill in more. No real fees are consumed in the test network; Value contract transfer amount, here is 0Wei; select HayekToken smart contract; fill in the currency issuance information (input parameters of the contract constructor), the number of coins issued is 21,000,000 (the same as Bitcoin, pay tribute to Satoshi Nakamoto ), currency name HayekToken, the minimum currency unit is 0 (decimaUnits), and the currency abbreviation is HYT.
After filling in the configuration information, click "Create" and the contract will start running. Then the metamask wallet pops up, requiring us to confirm the "transaction" and click "Submit".

4. Verification
After the smart contract was released, the smart contract address appeared in Remix:
You can also check the account balance. Note that you must add "" when entering the account, and click "balanceOf ”

You can see 21 million HYT in my account.

Add Token to the metamask wallet and you can also see the token.

Coin issuance successful!

Blockchain token issuance is very simple. How is it different from other tokens, such as Q coins?

Tokens act as a circulation medium in a proprietary field. Q coins can be used to purchase Tencent's virtual services, game coins can be used to catch dolls, and cafeteria menus can be used to buy food. What is the difference between ordinary tokens (Q coins, game coins, menu cards) and blockchain tokens (ERC20)? The core difference is actually not the difference between centralization and decentralization, but the difference between whether it can be freely exchanged. Q coins can only be recharged with legal tender on Tencent's platform, but Q coins cannot be exchanged for legal tender. Game coins can only be used to catch dolls, not to buy snacks. Menu cards can only be used in the cafeteria. Blockchain tokens can be exchanged for another token on the exchange, and can also be exchanged for legal currency over the counter.

This difference makes a huge difference. Blockchain tokens can be traded freely, forming a trading market with fluctuations and financial attributes. Scams such as banker coins and pyramid schemes use the financial properties of blockchain tokens to make money. In order to protect small investors (non-qualified investors), various countries have adopted varying degrees of supervision on blockchain tokens.

These analogies are actually very inaccurate, because with the introduction of blockchain tokens and incentive mechanisms, investors and users are integrated in these applications. That is to say, after the introduction of token incentives, holders of tokens become shareholders. Of course, shareholders expect this application to be widely popularized, and even contribute to the application, and receive benefits when the tokens appreciate. At the same time, token holders are also users and can use tokens to purchase application services or even rentLease tokens to others. This makes applications that introduce token incentives completely different from ordinary applications. Although ordinary applications may also have point rewards, points cannot be freely circulated and cannot be exchanged for money at will.

New production relationships based on blockchain tokens are being created. You can also try sending a token.