Related documents of blockchain

1. How to store information on the blockchain: call the API provided by the blockchain platform

generally, the blockchain platform will provide corresponding interfaces, such as RPC, json-rpc, HTTP, etc. of course, the platforms are not the same, and the degree of friendliness is different

some companies specializing in API, such as blockcypher, can provide friendly calling interfaces, and it is not very convenient to write answers on the mobile phone, Search below

as for the storage content, add a point: in addition to the conventional cloud storage, file entities on the file hash record chain also have blockchain based storage schemes, such as IPFs, storej and so on

2. China's local policies have been introced, which series of related policies? This is not very clear. Is this a national document?

3. Blockchain application fields:
1. Financial field. Blockchain has great potential application value in international exchange, letter of credit, equity registration, stock exchange and other financial fields. The application of blockchain technology in the financial instry can save the third-party intermediary link and realize the point-to-point direct docking, so as to greatly rece the cost and quickly complete the transaction payment< 2. Internet of things and logistics. Blockchain can also be naturally combined in the field of Internet of things and logistics. Through blockchain, we can rece logistics costs, trace the proction and delivery process of goods, and improve the efficiency of supply chain management. This field is considered as a promising application direction of blockchain

3. Public service. Blockchain is closely related to people's proction and life in public management, energy, transportation and other fields, but the centralization of these fields also brings some problems, which can be transformed by blockchain. The decentralized and fully distributed DNS service provided by the blockchain can realize domain name query and resolution through the point-to-point data transmission service between nodes in the network. It can be used to ensure that the operating system and firmware of an important infrastructure have not been tampered with. It can monitor the status and integrity of the software and detect bad tampering, And ensure that the data transmitted by the system using the Internet of things technology has not been tampered with< 4. Digital rights. Through blockchain technology, works can be authenticated to prove the existence of text, video, audio and other works, and ensure the authenticity and uniqueness of ownership. After the works are confirmed on the blockchain, the subsequent transactions will be recorded in real time to realize the full life cycle management of digital rights, and can also be used as a technical guarantee in judicial evidence collection. For example, mine labs, a start-up company in New York, developed a metadata protocol based on blockchain. This system called mediachain uses IPFs file system to realize right protection of digital works, mainly for right protection applications of digital pictures

5. Insurance. In terms of insurance claims, insurance institutions are responsible for fund collection, investment and claims settlement, and often have higher management and operation costs. Through the application of smart contract, there is no need for the applicant to apply or the insurance company to approve. As long as the claim conditions are triggered, the automatic claim settlement of the policy can be realized. A typical application case is lenderbot, which was launched by the blockchain enterprise stratumdeloitte and payment service provider lemonway in 2016. It allows people to register customized micro insurance procts through the chat function of Facebook messenger to insure the high value items exchanged between indivials, and the blockchain replaces the third party role in the loan contract< 6. Public welfare. The data stored on the blockchain is highly reliable and tamperable, which is naturally suitable for social public welfare scenarios. The relevant information in the public welfare process, such as donation project, collection details, fund flow, recipient feedback, etc., can be stored on the blockchain, and can be made transparent and public, which is convenient for social supervision.

4. You are right. The spring tide will come soon. Give me some time. In addition, it's not good to participate in the blockchain project. Let's have a look

5. As a mechanism of allocating social resources, law is determined by the objective requirements of social and economic development and directly affects the whole process of economic operation. It can simplify the complexity of social relations, save transaction costs, and help social members conct transactions safely, normatively and orderly
based on the legal framework, the blockchain technology makes the transaction information more secure and transparent, and the data more traceable through the pre-set automatic execution of intelligent contracts, which greatly reces the cost of law enforcement, presents the situation that the law and technology complement each other, and the law and economy are integrated, which makes the legal constraints and enforcement graally move towards intelligence
what is blockchain
blockchain is an innovative application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies in the Internet era
blockchain is essentially a decentralized distributed ledger database. It is a series of data blocks associated with cryptography. Each data block contains the information of effective confirmation of multiple bitcoin network transactions, which is used to verify the validity of the information (anti-counterfeiting) and generate the next block
foreign legal regulations on blockchain
as the blockchain technology itself is still in the exploration stage and has not been applied on a large scale, only some countries have enacted special legislation on blockchain technology< In the United States, Vermont and Arizona have passed bills to clearly define and support blockchain technology for public use. The bill stipulates the use specifications of blockchain and smart contract, and states that all data related to blockchain are "considered as electronic format and become electronic records", which is recognized by the state
UK
distributed ledger Technology: beyond blockchain mentions that the UK federal government will invest in blockchain technology to analyze the potential of blockchain application in traditional financial instry
Singapore
the government supports financial technology enterprises such as blockchain technology, and has launched a regulatory sandbox to provide a more tolerant development environment for blockchain start-ups
China's legal regulation on blockchain
in addition to the above-mentioned policies on blockchain itself, a series of regulatory provisions have been issued internationally for virtual currencies such as bitcoin
in our country, in addition to the policies on the transaction and financing of bitcoin and other virtual currencies, the government has also issued many policy regulations on blockchain
on December 27, 2016, blockchain technology was listed in the notice of the State Council on printing and distributing the 13th five year plan for national informatization. At the same time, the State Council also issued a document "China's blockchain instry is expected to walk in the forefront of the world" to support the healthy development of blockchain
it is mentioned in the guidance of the general office of the State Council on actively promoting the innovation and application of supply chain that we should study and use emerging technologies such as blockchain and artificial intelligence to establish a credit evaluation mechanism based on supply chain. Promote the organic docking of various supply chain platforms, and strengthen the disclosure and sharing of credit rating, credit record, risk warning, illegal and dishonest behavior and other information< In the eyes of lawyers, the legal risks of blockchain technology
as a distributed system, blockchain is an innovative application in the field of technology. According to the current exploration results, its technical concept can bring great changes to the development of various instries
however, as the law has not yet issued clear instry standards and applicable norms for blockchain, there are still problems such as national supervision and legal regulation in the future
taking bitcoin as a typical digital currency as an example, the first problem we face is supervision. Bitcoin and other digital currencies based on blockchain technology are logically decentralized and opposed to centralized supervision
secondly, the application of blockchain technology has to face huge risks. Taking bitcoin as an example, loss, theft, attack, speculation, money laundering and all kinds of disturbances, doubts and events have been accompanied by the development of bitcoin
the wide application of blockchain technology is inseparable from smart contract, which defines commitment in the form of digital coding. The two sides of the transaction do not need to trust each other, all transactions are enforced by the code
however, the validity of the form and content of smart contract has not been formally recognized by the law and the judiciary. As the contract text in the form of digital coding, it is not clear whether it can constitute the elements of an effective contract and whether it can meet the authenticity, legality and validity of the evidence to be accepted by the judiciary
e to the decentralized nature of blockchain technology, its own rules are bound to conflict and contradict with social rules and national legal rules. It is precisely conflicts and contradictions, risks and problems that can stimulate motivation and imagination, including that of society, the state and indivials
in the process of transaction, virtual currency based on the application of blockchain technology has posed great challenges to the legal tender and financial system of various countries, and caused investment risks and even social problems.

6. Bitcoin market suddenly soared, and now you can buy it. But you have to buy by yourself. Think about it, because bitcoin is a virtual currency. Market uncertainty, buy carefully.

7. White paper usually refers to authoritative reports or guidance texts, which are used to elaborate, solve or make decisions. The white paper has applications in both the government and the B2G market. It can be seen that the white paper is more of an official document, which stresses seeking truth from facts. When bencong of junior high school wrote the white paper, it was to give bitcoin seriousness and authority. However, the white paper of the blockchain project is different from the official documents of the government. It is more like a business financing plan of an enterprise. The contents that should be included in an enterprise's commercial financing plan are also introced in the white paper of blockchain project, such as project introction, team introction, technology introction, business model, financing amount, etc
a white paper of a blockchain project generally includes the following four aspects (of course, the specific ways of expression are different):
abstract, design principles and concepts, specific implementation scheme of the project, and project prospect
a white paper of a blockchain project shows the project, showing the market its business model, technical strength, team ability, and development vision, wait. This is a very important basis for investors to judge whether the project is good or bad. It is also a comprehensive display of the strength of the blockchain project team. For investors, the white paper of blockchain project can provide most of the information about the project, so as to help them make valuable investment decisions. For the project team, writing a white paper on blockchain project can also lay a very good foundation for crowdfunding this project
the essence of the white paper is the financing publicity concted by entrepreneurs to potential investors, so it needs to be as detailed and detailed as possible
enterprise vision, core team, market and problems, procts and solutions, token, statistics and forecast of capital use, development planning
investors look for in the white paper:
Company information, prototype, application of blockchain, team strength, strategic gap, competition, planning path, research basis and format
considering the detailed level of investors' browsing of the white paper, the content of the white paper should not contain any content that may cause investors' concern. Therefore, founders need to be very careful to provide as much information as possible. At the same time, they should ensure that the information is simple, easy to understand, supported by research or statistical data, and well presented
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