Ethereum blockchain node installation

1.

what is Ethereum:

Ethereum is an innovation based on the application of technologies and concepts in bitcoin to computers. Ethereum itself imitates a lot of bitcoin technology to maintain the computer platform. blockchain technology is one of them
Ethereum platform can safely run any program users want

advantages of Ethereum over other competitive currencies before Ethereum appeared, some digital currencies imitated bitcoin. However, these projects have their own shortcomings, they can only support one or several specific applications at the same time< However, the reason why Ethereum can surpass the limitations of these projects in the past is because of the core idea of Ethereum

what Ethereum wants to implement is a blockchain protocol with built-in programming language. Since it supports programming language, in theory, any blockchain application can be defined with this language, and then run on Ethereum's blockchain protocol as an application

The design of Ethereum is very flexible and adaptable

Ethereum target sets the advantages of blockchain technology, in order to add the advantages of blockchain, such as decentralization, openness and security, to almost all computing fields

blockchain applications of Ethereum

Ethereum has many blockchain applications, such as digital applications of gold and stocks, financial derivatives applications, DNS and digital authentication, etc

Ethereum has achieved more than 100 blockchain applications by many start-ups

Ethereum has also been closely watched by some financial institutions, banking consortia (such as R3), as well as large companies like Samsung, Deloitte, RWE and IBM. As a result, a number of blockchain applications such as simplified and automated financial transactions, merchant loyalty index tracking, and gift cards designed to achieve decentralization of electronic transactions have emerged

the relationship between Ethereum and blockchain:

Ethereum is a programmable blockchain

Ethereum does not give users a series of preset operations (such as bitcoin transaction), but allows users to create complex operations according to their own wishes

in this way, Ethereum can be used as a platform for various types of decentralized blockchain applications, including but not limited to cryptocurrency

like other blockchains, Ethereum also has a peer-to-peer network protocol. Ethereum blockchain database is maintained and updated by many nodes connected to the network. Each network node runs the Ethereum simulator and executes the same instructions. Therefore, people sometimes call Ethereum "world computer"

2. Ethereum blockchain has exposed three major problems, and its founder vitalik buterin has been unable to interpret them for a long time. The first is the low performance and TPS of Ethereum blockchain as a whole; The second is that resources are not isolated. The event of cryptokitties virtual cat once occupied 20% of the traffic of the whole Ethereum, which directly caused Ethereum network users unable to carry out timely transactions, which is the biggest pain point of resources not isolated; The third problem lies in the embodiment of Ethereum's governance structure. As a decentralized distributed ledger, the founder team of Ethereum has dominated its network development in the past. The over centralized governance mode has led to the bifurcation of eth, etc and ETF in Ethereum, and the Ethereum community is now in a state of fragmented governance. In the view of Ma Haobo, founder and CEO of "aelf", all kinds of disadvantages of Ethereum are unacceptable. Therefore, the positioning of "aelf" is born for the next generation of decentralized underlying computing platform of Ethereum, which focuses on solving the problems of insufficient performance, non isolation of resources and governance structure of Ethereum.

3. Ethereum, ETH for short. At the end of 2013, vitalik released the white paper of Ethereum, and in July 2014, the pre-sale of Ethereum began. At that time, insiders called this kind of token issue "crowdfunding". Through the 42 day pre-sale, the Ethereum team raised more than 30000 bitcoins through the pre-sale of 60102216 Ethernet coins; In addition, the early contributors who participated in the development before the pre-sale and the developers who have been engaged in project research for a long time are allocated according to 9.9% of the total amount of Ethernet coins sold at that time. So when Ethereum was officially released, there were more than 72 million Ethereum coins. After the end of Ethereum's pre-sale, it uses the proof of work mechanism POW for mining, and rewards the miners according to 26% of the total amount issued at that time every year. In October 2014, Ethereum reced the block output time from 60 seconds to 12 seconds, and now it is basically stable at 15 seconds, with 5 etheric coins awarded for each block
although the pow mining mechanism is adopted, the block out mechanism of Ethereum is different from that of bitcoin. Due to the short block time of Ethereum, Ethereum is easy to form isolated blocks. Isolated blocks refer to the blocks that are not on the longest chain. Bitcoin's isolated blocks have no block rewards, but in Ethereum, isolated blocks can be referenced. The referenced isolated blocks are called "Uncle blocks", and their packaged data will also be recorded in the blockchain. Unlike bitcoin, Ethereum's TERT block has a reward, and each TERT block can get a reward of 4.375 Ethernet coins at most
Ethereum is a programmable and Turing complete blockchain development platform, which is equivalent to a decentralized global computer. In a programming system, there are usually some virtual machines to compile and execute. Java has JVM. In Ethereum, there is also Ethereum's virtual machine EVM, which can execute any complex algorithm code. Developers can use existing programming languages such as JavaScript or Python to create their own applications on Ethereum. Through Ethereum's virtual machine, you can easily issue digital assets, write smart contracts, set up and run decentralized applications, and set up decentralized autonomous organizations
eth is also known as the internal fuel of Ethereum. Unlike currency digital assets, Ethereum is not only used for transfer, but also for payment of smart contracts
in order to prevent the Ethereum blockchain from being full of junk contracts and junk applications, and to establish and run smart contracts on Ethereum, you must use eth to pay for smart contracts. For example, when you transfer your newly created digital assets on the Ethereum blockchain, you need to use eth to pay the handling fee instead of your newly created digital assets.

4. You can download it from the app chainstore. It is a professional app store that integrates all the mainstream applications of blockchain and coin circle. It integrates exchanges, wallets, quotation software, tool software, blockchain information, blockchain games, instry applications, etc.

5. If you want to invest, it is recommended to consider whether you are optimistic about this instry first, because bitcoin, a kind of digital currency, has no real value, only collection value, and all the speculation prices are relatively high. If you want to invest, you should first choose a reliable old platform with good reputation, so that at least the money will not disappear out of thin air. You can take a look at AEX and fire coin, It has been more than 6 years and has a good reputation. For long-term investment, you can go to AEX for money management

6. How many account addresses can an Ethereum node have at most
A: generally, there is only one account address, otherwise there will be an error! Blockchain itself is unique. If there are multiple account addresses on one node, it violates the fundamental principle of blockchain!

7. Don't say ether, even when big pie trading, there are risks. If you want to rece the risk, you need to find a reliable platform and a reliable team, so as to minimize the risk.

8.

According to the data of okcoin, a well-known digital asset trading platform in China, yesterday, the opening price of Ethereum was 1463.00, the highest price was 1545.00 and the lowest price was 1451.01, closing at 1490.99. The closing price rose by 1.85% and the amplitude was 6.48%. Today, Ethereum opened at 1487.29, basically flat

According to analysts of okcoin, the price has shown signs of strengthening in recent trading days, with the price moving up at the low point of each adjustment. At present, the price is in a high consolidation, most of the time trading in the 1480-1530 range

To sum up, the 4-hour moving average system tends to be long, and the MACD index runs in strong regions, so it is more likely that the intraday price will continue to rise after a small adjustment. Focus on 1460 first-line support within the day. If the price stops falling and rebounds near this price, it means that the market is still strong. If it falls below this price, it will weaken, or test 1420 first-line long short watershed again

NASDAQ has entered into an agreement with major Swiss stock exchange operators to integrate blockchain into OTC procts and services. According to an application document released by the US Securities and Exchange Commission, NASDAQ, which has been studying blockchain technology since 2015, has reached an agreement with six Swiss Exchange, a subsidiary of six group. It is worth noting that six group is also testing blockchain technology through its SiC securities business line

the SEC document said: "in July 2017, NASDAQ signed an agreement with six Swiss Exchange to implement a solution based on distributed ledger technology for six OTC procts, and further use the NASDAQ financial framework (NFF) to promote the commercialization of blockchain technology

although it is not clear when the OTC solution will be developed and whether the deployment timeline has been formulated, this news is the latest progress of NASDAQ in promoting the commercialization of blockchain

for other blockchain projects of NASDAQ, in May this year, the stock exchange and financial giant Citibank reached a cooperation to jointly carry out blockchain payment research. Earlier, in March this year, NASDAQ revealed that it was providing blockchain technical support for a digital media contract exchange

In addition, NASDAQ also expressed its desire to invest more blockchain start-ups, and plans to invest tens of millions of dollars

NASDAQ is one of the most active exchanges in the field of blockchain in the world. In addition, the London Stock Exchange, the Hong Kong Stock Exchange and the New York Stock Exchange have publicly developed blockchain solutions. Not long ago, the London Stock Exchange, one of the world's four largest exchanges, announced its cooperation with IBM to create a blockchain securities platform for small and medium-sized enterprises. The Hong Kong Stock Exchange also announced the launch of a blockchain private stock exchange in 2018

9. Ethereum is also a proct of blockchain 2.0, which is an open intelligent contract complete solution. Bitcoin is the most important application of blockchain 1.0, which completes currency and payment transactions well. But when we need to record and transfer more complex asset types, we need the third step - a more powerful scripting system - to finally achieve Turing completeness (the ability to run any currency, protocol or blockchain). Ethereum is a blockchain based project, which aims to provide a Turing complete scripting language and Turing complete platform

blockchain 1.0 mainly refers to bitcoin. Blockchain 2.0 extends to all assets, while blockchain 3.0 goes beyond currency, finance, even commerce, and all areas of our lives, including politics, social relations, ecation, medical care, etc. According to the prediction and conception of people in the instry, the era of blockchain 3.0 will be realized in the next five years. At that time, blockchain will be recognized and accepted by all the public like the Internet, thus completely subverting our lives

McKinsey has submitted a technical report on blockchain to the Federal Insurance Advisory Committee of the United States. The report calls 2009-2016 the "Dark Age" and believes that all blockchain solutions ring this period are based on bitcoin, and the new era of blockchain will begin in 2016. At that time, the application of blockchain will become unprecedented. Applying an original sentence in McKinsey report: Based on the current development speed of blockchain, we believe that blockchain solutions may realize their full potential in the next five years.

10. The difference between laikelib and Ethereum is that Ethereum is a blockchain technology framework, and laikelib is similar to Ethereum. The difference is that laikelib only needs to synchronize the data of the chain that is needed or the user is interested in, which is faster and smaller. Ethereum must synchronize all the chain contents to achieve the same effect.