OK区块链60讲全集2,ok区块链60讲第二集

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『一』What is blockchain and how to evaluate blockchain

First of all, don’t think about blockchain too profoundly. It is a network that is distributed around the world and can The collaborative operation of the database storage system is different from the traditional database operation - the read and write permissions are in the hands of a company or a centralized authority (centralization characteristics). The blockchain believes that anyone with the ability to set up server nodes can participate in it. . Nuggets from all over the world have deployed their own nodes locally and connected to the blockchain network to become a node in this distributed database storage system; once joined, the node enjoys exactly the same rights as all other nodes and obligations (decentralized, distributed characteristics). At the same time, people who provide services on the blockchain can perform read and write operations on any node in the system. Finally, all nodes around the world will complete synchronization one after another according to a certain mechanism, thereby achieving The data of all nodes in the blockchain network are completely consistent.

Blockchain itself is a technology, therefore, it cannot be a scam. Just like the "p2p" finance that has become popular in recent years, how many scammers are disguised as P2P concepts and illegally absorb Public funds, defrauding people of their hard-earned money? But is "P2P" guilty? It is just a person-to-person model of Internet finance. It not only creates profits, but also lifts thousands of people out of poverty, achieving a win-win situation for both those who are helping the poor and those who are being helped. Bihui Digital Currency Trading Platform

The existence of problems cannot hinder the development of the blockchain. The proposal and in-depth research of technologies such as simple payment verification, side chains, and lightning network protocols are already part of the blockchain The chain actually solves the problem.

『二』What does blockchain mean and how to understand it

Blockchain, distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other new application models of computer technology.

Blockchain is an important concept of Bitcoin. It is essentially a decentralized database. As the underlying technology of Bitcoin, it is a series of related cryptographic methods. Each data block contains a batch of Bitcoin network transaction information, which is used to verify the validity of the information (anti-counterfeiting) and generate the next block.

Notes

1. Blockchain Originated from Bitcoin, on November 1, 2008, a person claiming to be Satoshi Nakamoto published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", which elaborated on P2P network technology, encryption technology, The architectural concepts of electronic cash systems such as timestamp technology and blockchain technology mark the birth of Bitcoin.

Two months later, the theory came into practice, and on January 3, 2009, the first genesis block with serial number 0 was born. few daysOn January 9, 2009, the block with serial number 1 appeared and was connected with the genesis block with serial number 0 to form a chain, marking the birth of the blockchain.

2. In order to realize the great leap forward development of blockchain finance, in order to promote the new development of China’s economy, accelerate the circulation of global assets, and realize the dream of rejuvenation that generations have been striving for, Puyin Group launched the On the 9th, a Puyin Blockchain Finance Guiyang Strategy Release Ceremony was held in Guizhou. At the meeting, the digital circulation of assets through blockchain, the blockchain financial transaction model, and the application of blockchain services and social public industries will be discussed. Start a discussion.

『三』What is "OK Blockchain 60 Lectures" produced by OKEx?

"OK Blockchain 60 Lectures" is a popular science on blockchain jointly produced by OKEx and Sina Technology Animation, OKEx, as a producer and publisher, has used its rich resources accumulated over a long period of time and teamed up with industry professionals to create an easy-to-understand blockchain. Learning is possible. The main purpose of OKEx's move is to make the public better. Understand blockchain knowledge and establish a correct understanding of blockchain concepts.

『四』What are some important elements of blockchain technology

1. The so-called blockchain technology, referred to as BT (Blockchain technology), is also called a distributed ledger Technology is an Internet database technology that is characterized by decentralization, openness and transparency, allowing everyone to participate in database records.
2. Blockchain is an innovative application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm in the Internet era. In recent years, the development and application of blockchain have had a profound impact on technology. Innovation and industrial revolution are of great significance. This experience introduces relevant knowledge of blockchain technology.
3. Blockchain is a distributed ledger that can contain financial and/or non-financial transactions, replicated (distributed) across multiple systems in near real-time through a peer-to-peer network, and each participant "owns" the same Having a copy of the ledger and getting updates as any transactions are added, each participant helps determine the inherent "immutability" of all existing records, using cryptography and digital signatures to prove identity, authenticity and enforce read/ With write access, there are mechanisms that make it difficult to change the history and can easily detect someone trying to change it.

『五』What is the ether world

Ether was originally a concept in physics. It was invented to explain some natural phenomena that were unexplainable at the time. This fictitious material Duan Qingxiao is considered to be a more basic natural existence, in which all matter exists, and is a cosmic medium. The universe exists in it, just like fish living in water. It should be transparent It is everywhere and fills the entire universe. Unfortunately, subsequent developments in physics have proven that this is a wrong concept, and ether does not exist.
But the concept of etherBut it has not died out because of this. On the contrary, due to its legendary life, more and more modern people want to use the extended meaning of the word ether to express their unique ideas, such as understanding the computer Ethernet network we see every day. ...
In the book [Everything About Lily Zhou], I think the author made use of the extended meaning of the word ether, using it to represent a state of life and an empty belief. Just like ether The original meaning of this word is the same - it represents: something that is everywhere and cannot be escaped (the original meaning of ether is something that fills the universe, it must be everywhere, and since we live in the universe, we are destined to be unable to escape) Escape it), empty things (any object can pass through the ether and survive in the universe, so the ether must be "hollow", which can be extended to the concept of "emptiness" in life), a kind of human belief (the ether is not It was not discovered by physical experiments, but created by people's imagination. The scientists at that time were very willing to believe in its existence, so it can be called a kind of belief.)
Based on the above analysis, I think The word ether in this book represents a suffocating life state and an abstract and empty belief

『Lu』How to understand the smart contract of the blockchain

< p>The term "smart contract" dates back to at least 1995, coined by prolific interdisciplinary legal scholar Nick Szabo. In several articles published on his website Mentioned the concept of smart contracts. His definition is as follows:

“A smart contract is a set of promises defined in digital form, including an agreement on which contract participants can execute these promises. ”

Let us explore the meaning of his definition in more detail.

Commitments

A set of promises agreed upon by the parties to a contract (often mutually of) rights and obligations. These commitments define the nature and purpose of the contract. Take a sales contract as a typical example. The seller promises to deliver the goods, and the buyer promises to pay a reasonable price.

Digital form

Digital form means that the contract must be written in computer-readable code. This is necessary because as long as the parties reach an agreement, the rights and obligations established by the smart contract are executed by a computer or computer network.

Further explanation:

(1) Reaching an agreement

When do the participants in a smart contract reach an agreement? The answer depends on the specific smart contract implementation . Generally speaking, a contract is discovered when a participant commits to the execution of the contract by installing the contract on the contract hosting platform.

(2) Contract Execution

" The true meaning of "execution" also depends on implementation. Generally speaking, execution means active implementation through technical means.

(3) Computer-readableCode

Also, the specific "digital form" required for a contract is very dependent on the protocol the parties have agreed to use.

Agreement

Agreement is a technical implementation, based on which contract commitments are realized or the realization of contract commitments is recorded. Which protocol is chosen depends on many factors, the most important being the nature of the assets being traded during the performance of the contract.

Take the sales contract as an example again. Assume that the parties agree to pay in Bitcoin. The protocol of choice will obviously be the Bitcoin protocol, on which smart contracts are implemented. Therefore, the "digital form" that the contract must use is the Bitcoin script language. The Bitcoin Script Language is a non-Turing complete, imperative, stack-based programming language similar to Forth.

Smart Contract

The Xueshuo Innovation Blockchain Technology Workstation under Lianqiao Education Online is a Chinese education It is the only approved "blockchain technology professional" pilot workstation for the "Smart Learning Workshop 2020-Master's Degree Innovation Workstation" launched by the Ministry of Education's Planning, Construction and Development Center. The professional base is based on providing students with diversified growth paths, promoting the reform of the training model integrating professional degree research, production, and research, and building an applied and compound talent training system.

『撒』What are the characteristics of decentralization of blockchain?

Decentralization is a disruptive feature of blockchain technology. It does not require a centralized agent and achieves a This direct point-to-point interaction makes high-efficiency, large-scale, and non-centralized agent-free information interaction a reality.
Jinwowo Group will use blockchain technology to promote the legalization of big data commercial use. The encryption of blockchain technology can ensure that the privacy of data sources is better protected while calling big data, thereby eliminating the unhealthy phenomenon of illegal reselling of big data and re-establishing the rules of legal circulation and application in the data market.