优贝迪区块链入门费多少钱一个月,优贝迪区块链入门费多少钱一年

优贝迪区块链入门费用是每月599元，每年可以享受优惠，价格为5999元。在这里，我们将讨论3个相关的关键词：区块链技术，区块链开发和优贝迪区块链入门费用。

区块链技术

区块链技术是一种分布式账本技术，它是一种把记录组织成一系列不可篡改的块的技术。每个块都包含一些交易信息，这些信息可以在网络上的每个节点上进行安全存储。区块链技术的主要优点是它提供了一种安全的、可验证的、可追溯的交易记录，可以用于存储和跟踪数字资产。

区块链开发

区块链开发是指使用技术工具来构建和部署区块链应用程序的过程。开发人员可以使用多种不同的编程语言（如JavaScript、C++、Python等）来开发区块链应用程序，并使用区块链技术来构建安全、可验证的分布式应用程序。

优贝迪区块链入门费用

优贝迪区块链入门费用为每月599元，每年可以享受优惠，价格为5999元。优贝迪的区块链入门费用涵盖了所有必要的资源，包括课程、项目和支持，以及优贝迪的专业技术团队的支持。此外，优贝迪还提供免费的试学课程，让学生可以更好地了解区块链技术，并能够轻松地进入区块链领域。

总之，优贝迪区块链入门费用每月599元，每年可以享受优惠，价格为5999元，是一个非常合理的价格。另外，优贝迪还提供免费的试学课程，让学生可以更好地了解区块链技术，并能够轻松地进入区块链领域。

请查看相关英文文档

❶ What to do with the money in Youbeidi in 2021

We can only wait for legal sanctions and whether the money deposited can be recovered.
Ubeidi is divided into two parts: Xu Gang is controlled remotely from abroad, and the domestic puppet core helps the evildoer and spreads Xu Gang's MLM concept crazily. This behavior of collecting money at home and spending it abroad is bad and will definitely be severely punished. Therefore, there is no doubt that a few core members have been arrested, and there is no room for maneuver at all. So we can only wait for legal sanctions and whether the money deposited can be recovered.
Extended information: 1. China UnionPay issued a statement on its official website on March 1, saying that recently, China UnionPay has noticed that there have been publicity and issuances of Ubank digital asset UnionPay cards on the Internet in the name of "Ubeidi", and the development of virtual currency and other businesses. Information.
After verification, China UnionPay has never carried out any cooperation with "Ubeidi" and has never issued Ubank digital asset UnionPay cards. Here, UnionPay specifically reminds cardholders to guard against scams created by using concepts such as virtual currency and blockchain to safeguard their legitimate rights and interests.
2. Trilogy of "Ubeidi" routines:
1. Fictitious investment projects that can obtain high profits to attract investors to invest in mining (introduced UBG consensus plan, claiming that the mining pool has 700 billion UBG) Coin, 1 UBG is equal to 0.1USD, so as to induce investment);
2. Use "lock-up mining and income doubling" as a means to trick investors into lock-up their invested funds (promise to invest 100,000 UBNK Purchase a mining machine worth 17,000 USD and enjoy 3.5 times the income of the mining pool, with an additional 0.3% daily income.);
3. Use the two mechanisms of "sharing acceleration and community acceleration" to induce development offline and obtain high profits. .
3. What is the essence of Ubeidi
1. Its predecessor was a wallet disk, but it could not run in the later period. In order to avoid supervision, the system was revised and changed to its current name.
But regardless of the system How to modify it? Change the soup without changing the medicine. After changing it, the platform still uses the "static + dynamic" MLM model to attract people.
2. To put it simply, static income means that investors first invest a part of their funds. , after a period of fermentation, it will be released in proportion to earn high interest. According to the platform, the total monthly income is 23%.
3. The dynamic gameplay is simpler, although the rewards are divided into "sharing acceleration" " and "Community Acceleration", but the two sections ultimately have the same meaning: to attract people. The more people you attract, the greater the reward will naturally be, and the greater the proportion of funds released.

❷ How much will Ubeidi rise to by the end of this year

Ubeidi will not rise much by the end of this year. The specific amount cannot be given. Ubeidi's momentum is not very good. Well, I suggest you sell it as soon as possible. Since the first release of Beidi Fund in June 2019, the value of Beidi Fund has skyrocketed. Countless Youbeidi communities who have worked hard with Youbeidi have even made crazy profits of 2500%. Youbeidi Fund Known by the industry asIt has become the most promising blockchain incubation fund and is also one of the most successful incubation funds.

Types of funds in the market

Funds are classified from low to high risk. 1. Monetary funds: Monetary funds have the characteristics of high security and high liquidity. Under normal circumstances, the possibility of losses in money funds is very small. Investors only need to choose fund companies with strong risk resistance. Money funds are more suitable for prudent and conservative investors to invest. 2. Bond fund: Bond fund invests in bonds with fixed expected returns such as national bonds or corporate bonds. It has the characteristics of redemption at any time. Generally, bond funds will fluctuate in the short term but will be stable in the long term. Growth is more suitable for prudent investors and can better meet the safety needs of investors. 3. Mixed funds: Mixed funds can invest in all the targets of other funds, so their risk levels can also be adjusted. They are generally hybrid funds that are mainly bonds, mainly stocks, or balanced funds. Therefore, investors can choose funds based on their own risk preferences. The risk level is medium to high risk. 4. Index funds: Index funds track indexes. Compared with other funds, they are less dependent on fund managers. Since they have the function of tracking the target, their information transparency is higher. The general risk level is high risk. 5. Stock funds: Stock funds are the investment funds with the highest risk among fund investments. Since its investment target is the stocks of listed companies, it is highly volatile, so it is very important to choose a better fund manager. The better the manager, the better the fund allocation and investment strategy, and the higher the profit may be. 6. Other fund types: Hedge funds, feeder funds and enhanced funds are developed on the basis of conventional funds. These funds have their own investment advantages and different risk levels. Generally, they need to be analyzed according to specific situations.

❸ How to get started with blockchain. These knowledge are not difficult to learn

1. To learn blockchain knowledge, first learn the necessary concepts of blockchain knowledge.

2. [Blockchain]

The English name blockchain is the underlying technology of Bitcoin and a decentralized accounting method.

3. [Block and Chain]

Block refers to the information block that records transaction information. Each block contains three main factors: The ID of the block, the odd number of the transaction, and the ID of the previous block.

The Bitcoin system generates a block approximately every 10 minutes. Each block contains the ID of the previous block, making the blocks form a complete transaction chain. The longest one is The only master blockchain.

4. [Bitcoin]

Bitcoin is a practical application of blockchain technology. It is a peer-to-peer electronic cash payment system. The earliestAs a virtual currency, Japan has recognized the legality of Bitcoin and can use Bitcoin for shopping.

5. [Satoshi Nakamoto]

The legendary founder of Bitcoin published a paper on a peer-to-peer electronic cash system in 2008, marking the The birth of Bitcoin.

6. [Digital Currency]

It is completely different from the Q coins and other virtual currencies we use to play games in real life. For example, in Japan, although Bitcoin is a digital currency , but it can already be used to purchase goods in real scenarios.

7. [PoW]

A type of consensus mechanism, also known as proof of work. Bitcoin currently uses this consensus mechanism. It is relatively simple and easy to reach consensus, but consumes huge amounts of energy and is prone to bifurcation.

8. [PoS]

A type of consensus mechanism, also known as proof of equity. People with greater equity have a higher probability of becoming bookkeepers, but bookkeeping Human ones are not necessarily professional, don’t use much energy, and are prone to split ends.

9. [DpoS]

On the basis of PoS, the bookkeepers are changed from unprofessional to professionals, like the EOS we are familiar with. In this consensus method, holders jointly select 21 nodes and 100 reserve nodes to connect the EOS constitution to reach a consensus, and jointly incubate the ecology on EOS.

10. [Public key and private key]

In the world of blockchain, the public key is equivalent to the bank account number, and the private key is equivalent to the bank account number + withdrawal password. The private key is essentially an array of 32 bytes. The private key can generate the public key and address, but this behavior is irreversible, so it is crucial to keep the private key. Losing the private key is equivalent to losing money. And it can never be found back.

11. [Hash value]

It can be simply thought of as a set of data that is closely arranged together. No item in the data can be changed, otherwise The calculated consequences will be very different.

12. [Smart Contract]

It is a promise in digital form. Both parties involved can execute these promised agreements on the consumer network without artificial restrictions. .

13. [Credit Consensus]

Based on the characteristics of blockchain, it is a distributed accounting method that cannot be tampered with and is irreversible. A mechanism of trust that allows many people to form a trust based on digital algorithms.

14. [Public chain andPrivate chain】

The public chain refers to a blockchain that can be participated in by everyone around the world and can be read by everyone. It is open to everyone, while the private chain is only in the hands of an organization and is only available to individuals. Or physically open.

Blockchain is currently a hot topic. Many traditional large enterprises and venture capital are actively participating in the layout and investment of the blockchain industry. As the general public, we must master the necessary blockchain knowledge. , helps us judge and analyze real-world information and protect our investments.

❹ 108 essential knowledge points for getting started with blockchain

Author: Kong Lin

61. Hold on

Expect the currency price to rise, but unexpectedly the currency price falls after buying; or expect the currency price to fall, but unexpectedly the currency price rises after selling

62. Unwinding

After buying Bitcoin, the currency price fell, causing a temporary book loss, but the currency price rebounded later and the loss turned into profit

63. Going short

After selling Bitcoin because of the bearish market outlook, However, the currency price continued to rise, and I failed to buy in time, so I failed to make profits

64. Overbought

The currency price continued to rise to a certain height, and the buyer's power was basically exhausted. The currency price is about to fall

65. Oversold

The currency price continues to fall to a certain low, the seller's power is basically exhausted, and the currency price is about to rise

66. Lure bulls

The currency price has been consolidating for a long time and is more likely to fall. Most short sellers have sold Bitcoin. Suddenly the short sellers pull up the currency price, inducing many parties to think that the currency price will rise and buy one after another. As a result, the short side suppressed the price of the currency, causing the long side to get stuck

67. Short induction

After the bulls bought Bitcoin, they deliberately suppressed the price of the currency, making the short sellers think that the price of the currency would fall. , were thrown out one after another, and ended up falling into the trap of bulls

68. What is NFT

The full name of NFT is "Non-Fungible Tokens", that is, To put it simply, non-fungible tokens are an indivisible copyright certificate on the blockchain. They are mainly used to confirm and transfer the rights of digital assets. The difference from digital currencies is that they are unique and indivisible. In essence, they are a a unique digital asset.

69. What is the Metaverse

The Metaverse is a collection of virtual time and space, consisting of a series of augmented reality (AR), virtual reality (VR) and the Internet (Internet) Composed of digital currency, which carries the function of value transfer in this world.

70. What is DeFi

DeFi, allIt’s called Decentralized Finance, which means “decentralized finance” or “distributed finance”. "Decentralized finance", as opposed to traditional centralized finance, refers to various financial applications based on open decentralized networks. The goal is to establish a multi-level financial system based on blockchain technology and cryptocurrency. As a basis, re-create and improve the existing financial system

71. Who is Satoshi Nakamoto?

72. Bitcoin is different from Q Coin

Bitcoin is a decentralized digital asset with no issuing entity. Q Coin is an electronic currency issued by Tencent. It is similar to electronic points, but it is not actually a currency. Q Coin requires a centralized issuing institution. Q Coin can only be recognized and used because of the credit endorsement of Tencent. The scope of use is also limited to Tencent's games and services. The value of Q coins is entirely based on people's trust in Tencent.

Bitcoin is not issued through a centralized institution, but it is widely recognized around the world because Bitcoin can self-certify its trust. The issuance and circulation of Bitcoin are jointly accounted for by miners across the entire network, and are not A central authority is also needed to ensure that no one can tamper with the ledger.

73. What is a mining machine?

Taking Bitcoin as an example, a Bitcoin mining machine is a professional equipment that competes for accounting rights by running a large amount of calculations to obtain new Bitcoin rewards. It is generally composed of a mining chip, a heat sink and a fan, and only performs A single calculation program consumes a lot of power. Mining is actually a competition between miners for computing power. Miners with more computing power have a greater probability of mining Bitcoin. As the computing power of the entire network increases, it becomes increasingly difficult to mine bits with traditional equipment (CPU, GPU), and people have developed chips specifically for mining. The chip is the core part of the mining machine. The operation of the chip will generate a large amount of heat. In order to dissipate heat, Bitcoin mining machines are generally equipped with heat sinks and fans. Users download Bitcoin mining software on their computers, use the software to assign tasks to each mining machine, and then start mining. Each currency has a different algorithm and requires different mining machines.

74. What is quantitative trading?

Quantitative trading, sometimes also called automated trading, refers to the use of advanced mathematical models to replace human subjective judgments, which greatly reduces the impact of investor sentiment fluctuations and avoids extreme fanaticism or pessimism in the market. make irrational investment decisions. There are many types of quantitative trading, including cross-platform trading, trend trading, hedging, etc. Cross-platform trading means that when the price difference between different target platforms reaches a certain amount, sell on the platform with a higher price and buy on the platform with a lower price.

75. Blockchain asset over-the-counter trading

Over-the-counter trading is also called OTC trading. Users need to find their own counterparties and do not need to match the transaction. The transaction price is determined by negotiation between the two parties. The two parties can use face-to-face negotiation or telephone communication to determine the transaction price.Communicate fully.

76. What is a timestamp?

The blockchain ensures that each block is connected sequentially through timestamps. Timestamps enable every piece of data on the blockchain to have a time stamp. Simply put, timestamps prove when something happened on the blockchain and cannot be tampered with by anyone.

77. What is a blockchain fork?

Upgrading software in a centralized system is very simple, just click "Upgrade" in the app store. However, in decentralized systems such as blockchain, "upgrading" is not that simple, and a disagreement may even cause a blockchain fork. Simply put, a fork refers to a disagreement when the blockchain is "upgraded", resulting in a fork in the blockchain. Because there is no centralized organization, every code upgrade of digital assets such as Bitcoin needs to be unanimously recognized by the Bitcoin community. If the Bitcoin community cannot reach an agreement, the blockchain is likely to form a fork.

78. Soft fork and hard fork

Hard fork means that when the Bitcoin code changes, the old nodes refuse to accept the blocks created by the new nodes. Blocks that do not comply with the original rules will be ignored, and miners will follow the original rules and create new blocks after the last block they verified. A soft fork means that old nodes are not aware of the changes to the Bitcoin code and continue to accept blocks created by new nodes. Miners may work on blocks they have no understanding of, or validation of. Both soft forks and hard forks are "backwards compatible" to ensure that new nodes can verify the blockchain from scratch. Backward compatibility means that new software accepts data or code generated by old software. For example, Windows 10 can run Windows XP applications. Soft forks can also be "forward compatible".

79. Classification and application of blockchain projects

Judging from the current mainstream blockchain projects, blockchain projects mainly fall into four categories: Category 1: Currency; The second category: platform category; the third category: application category; the fourth category: asset tokenization.

80. USDT against the US dollar

USDT is Tether USD, a token launched by Tether that is against the US dollar (USD). 1USDT=1 US dollar, users can use USDT and USD for 1:1 exchange at any time. Tether implements a 1:1 reserve guarantee system, that is, each USDT token will have a reserve guarantee of 1 US dollar, which supports the stability of the USDT price. The unit price of a certain digital asset is USDT, which is equivalent to its unit price in US dollars (USD).

81. Altcoins and alternative coins

Altcoins refer to blockchain assets that use the Bitcoin code as a template and make some modifications to its underlying technology blockchain, among which Those with technological innovations or improvements are also called alternative coins. Because BitcoinThe code is open source, which makes the plagiarism cost of Bitcoin very low. Even just copy the Bitcoin code and modify some parameters to generate a brand new blockchain.

82. Three major exchanges

Binance

Okex

Huobi

83. Market software

Mytoken

Non-small account

CMC

84. Information website

Babbitt

Golden Finance

Coin World News

85. Blockchain Browser

BTC

ETH

< p> BCH

LTC

ETC

86. Wallet

Imtoken

Bitpie

87. Decentralized exchange

uniswap

88. NFT exchange

Opensea< /p>

Super Rare

89. Ladder

Bring your own, buy a reliable ladder

90. Platform currency

The digital currency issued by the platform is used to deduct handling fees, transactions, etc.

91. Bull market, bear market

Bull market: rising market

Bear market: falling market< /p>

92. Blockchain 1.0

A currency trading system based on distributed ledgers, represented by Bitcoin

93. Blockchain 2.0

< p> The contract blockchain technology represented by Ethereum (smart contract) is 2.0

94. Blockchain 3.0

In the era of intelligent Internet of Things, it goes beyond the financial field and provides various The industry provides decentralized solutions

95. Smart Contract

Smart Contract is a computer protocol designed to disseminate, verify or execute contracts in an information-based manner. Simply put, an electronic contract is set up in advance, and once both parties confirm it, the contract will be automatically executed.

96. What is a token?

The token economy is an economic system with Token as the only reference standard, which is equivalent to a pass. If you own Token, you have rights and interests, and you have the right to speak.

Big data is the means of production, AI is the new productivity, and blockchain is the new production relationship. Big data refers to a collection of data that cannot be captured, managed and processed within a certain time range using conventional software tools. It is a massive, high-growth and high-volume data set that requires new processing models to have stronger decision-making power, insight discovery and process optimization capabilities. Diverse information assets. Simply understood, big data is massive data accumulated over a long period of time and cannot be obtained in the short term. Blockchain can be used as a way to obtain big data, but it cannot replace big data. Big data is only used as a medium running in the blockchain and has no absolute technical performance, so the two cannot be confused. (The production relationship is simply understood as the relationship between labor exchange and consumption. The core lies in productivity, and the core of productivity lies in production tools)

ICO, Initial Coin Offering, initial public token issuance, is the first step in the blockchain digital currency industry. Crowdfunding. It is the most popular topic and investment trend in 2017, and the country launched a regulatory plan on September 4. Speaking of ICO, people will think of IPO, and the two are fundamentally different.

99. Five characteristics of digital currency

The first characteristic: decentralization

The second characteristic: having open source code

The third feature: independent electronic wallet

The fourth feature: constant issuance

The fifth feature: global circulation

100. What is decentralization?

It has no issuer, does not belong to any institution or country, and is a publicly issued currency designed, developed and stored on the Internet by Internet network experts.

100. What is measurement (scarcity)?

Once the total amount of issuance is set, it is permanently fixed, cannot be changed, cannot be over-issued at will, and is subject to global Internet supervision. Because the difficulty of mining and mining changes over time, the longer the time, the greater the difficulty of mining, and the fewer coins are mined, so it is scarce.

101. What is open source code?

The alphanumeric code is stored on the Internet. Anyone can find out the source code of its design, everyone can participate, can mine it, and it is open to the world.

102. What is anonymous transaction? Private wallet private?

Everyone can register and download the wallet online without real-name authentication. It is completely composed of encrypted digital codes. It can be sent and traded globally in real-time point-to-point without resorting to banks or any institutions. It cannot be traced by anyone without my authorization. ,Inquire.

A contract transaction refers to an agreement between a buyer and seller to receive a certain amount of an asset at a specified price at a certain time in the future. contract tradingThe trading object is a standardized contract formulated by the exchange. The exchange stipulates standardized information such as product type, trading time, quantity, etc. A contract represents the rights and obligations of the buyer and seller.

105. Digital Currency Industry Chain

Chip manufacturers, mining machine manufacturers, and mining machine agents mine and export to exchanges for retail investors to speculate in coins< /p>

106. Who is Kong Lin?

Kong Lin: Digital Currency Value Investor

Investment style: Steady

p>

107. Konglin Investment Strategy

Combining long-term and short-term, focusing on price investment, no touching contracts, no short-term play

Reasonable layout, scientific operation, steady and conservative, earning Cycle money

108. Konglin?

Welcome currency friends and seek common development

❺ Tutorials for getting started with blockchain

However, there are very few simple and easy-to-understand introductory articles. What exactly blockchain is and what makes it special is rarely explained.
Next, I will try to write a best-understood blockchain tutorial. After all, it is not difficult. The core concept is very simple and can be explained clearly in a few sentences. I hope that after reading this article, you will not only understand the blockchain, but also understand what mining is, why mining is getting more and more difficult, and other issues.
It should be noted that I am not an expert in this area. Although I have been paying attention to it for a long time, my detailed understanding of blockchain started at the beginning of this year. You are welcome to correct any errors or inaccuracies in the article.
1. The essence of blockchain
What is blockchain? In a word, it is a special distributed database.
First of all, the main function of blockchain is to store information. Any information that needs to be saved can be written to the blockchain and read from it, so it is a database.
Secondly, anyone can set up a server, join the blockchain network, and become a node. In the world of blockchain, there is no central node. Every node is equal and stores the entire database. You can write/read data to any node, because all nodes will eventually be synchronized to ensure that the blockchain is consistent.
2. The biggest features of blockchain
Distributed databases are not a new invention, and there have been such products on the market for a long time. However, blockchain has a revolutionary feature.
Blockchain has no administrator, it is completely centerless. Other databases have administrators, but blockchain does not. If one wanted to add auditing to the blockchain, it would not be possible because it is designed to prevent the emergence of a central authority.
It is precisely because of the failure to manage that blockchainTo be able to be uncontrollable. Otherwise, once big companies and large groups control the management, they will control the entire platform, and other users will have to take orders from them.
However, without an administrator, everyone can write data into it. How can we ensure that the data is trustworthy? What if it is modified by a bad person? Please read on, this is the wonderful thing about blockchain place.
3. Block
Blockchain is composed of blocks. Blocks are much like database records. Every time data is written, a block is created.
Each block contains two parts.
Head: records the characteristic values ​​of the current block
Body: actual data
The block header contains multiple characteristic values ​​of the current block.
Generation time
Hash of the actual data (i.e. block body)
Hash of the previous block
...
Here, you need to understand what a hash is , which is necessary to understand blockchain.
The so-called hashing means that the computer can calculate a characteristic value of the same length for any content. The hash length of the blockchain is 256 bits, which means that no matter what the original content is, a 256-bit binary number will be calculated in the end. And it can be guaranteed that as long as the original content is different, the corresponding hash must be different.
For example, the hash of the string 123 is (hexadecimal), which is 256 bits when converted to binary, and only 123 can get this hash. (Theoretically, it is possible for other strings to get this hash, but the probability is extremely low and can be approximated as impossible.)
Therefore, there are two important inferences.
Corollary 1: The hash of each block is different, and the block can be identified by the hash.
Corollary 2: If the content of the block changes, its hash will definitely change.
4. The non-modifiable nature of Hash
Blocks and hashes have a one-to-one correspondence, and the hash of each block is calculated based on the block header (Head). That is to say, the characteristic values ​​​​of the block header are connected together in order to form a very long string, and then the hash is calculated on this string.
Hash = SHA256 (block header)
The above is the calculation formula of block hash. SHA256 is the hash algorithm of the blockchain. Note that this formula only contains the block header and not the block body. In other words, the hash is uniquely determined by the block header.
As mentioned before, the block header contains a lot of content, including the hash of the current block body. , and the hash of the previous block. This means that if the content of the current block body changes, or the hash of the previous block changes, it will definitely cause the hash of the current block to change.
This point has great significance for blockchain. If someone modifies a block, the hash of the block changes. In order for subsequent blocks to still be connected to it (because the next block contains the hash of the previous block), the person must modify the subsequent blocks in sequence.There are blocks, otherwise the changed blocks will be out of the blockchain. Due to the reasons mentioned later, hash calculation is very time-consuming, and it is almost impossible to modify multiple blocks in a short period of time, unless someone controls more than 51% of the computing power of the entire network.
It is through this linkage mechanism that the blockchain ensures its own reliability. Once the data is written, it cannot be tampered with. This is just like history, what happened happened, and it can’t be changed from now on.
Each block is connected to the previous block, which is where the name blockchain comes from.
5. Mining
Since synchronization between nodes must be ensured, the adding speed of new blocks cannot be too fast. Just imagine, you have just synchronized a block and are preparing to generate the next block based on it, but at this time, another node generates a new block, and you have to give up half of the calculations and synchronize again. Because each block can only be followed by one block, you can only generate the next block after the latest block. So, you have no choice but to sync as soon as you hear the signal.
So, the inventor of the blockchain, Satoshi Nakamoto (this is a pseudonym, his true identity is still unknown), deliberately made it difficult to add new blocks. His design is that on average, the entire network can generate a new block every 10 minutes, which is only six per hour.
This output speed is not achieved through commands, but by deliberately setting up massive calculations. In other words, only through an extremely large amount of calculations can the effective hash of the current block be obtained and the new block added to the blockchain. Because the amount of calculation is too large, it cannot be done quickly.
This process is called mining, because the difficulty of calculating a valid hash is like finding a grain of sand that meets the conditions among the sand in the world. The machine that calculates hashes is called a mining machine, and the person who operates the mining machine is called a miner.
6. Difficulty coefficient
After reading this, you may have a question. People say that mining is difficult, but isn’t mining just about using a computer to calculate a hash? This is the strength of computers. How could it be? It becomes very difficult, why can’t it be calculated?
It turns out that not just any hash can be used, only hashes that meet the conditions will be accepted by the blockchain. This condition is particularly harsh, causing most hashes to fail to meet the requirements and must be recalculated.
It turns out that the block header contains a difficulty coefficient (difficulty), which determines the difficulty of calculating the hash. For example, the difficulty coefficient of the 100,000th block is 14484.16236122.
The blockchain protocol stipulates that the target value (target) can be obtained by dividing the difficulty coefficient by a constant. Obviously, the greater the difficulty coefficient, the smaller the target value.
The validity of the hash is closely related to the target value. Only hashes smaller than the target value are valid, otherwise the hash is invalid and must be recalculated. Since the target value is very small, the chance that the hash is smaller than this value is extremely slim. It may be calculated 1 billion times before it is considered a hit. This is the fundamental reason why mining is so slow.
frontAs mentioned, the hash of the current block is uniquely determined by the block header. If the hash of the same block needs to be calculated repeatedly, it means that the block header must keep changing, otherwise it is impossible to calculate different hashes. All feature values ​​in the block header are fixed. In order to make the block header change, Satoshi Nakamoto deliberately added a random item called Nonce.
Nonce is a random value. The role of the miner is actually to guess the value of Nonce so that the hash of the block header can be smaller than the target value so that it can be written to the blockchain. Nonce is very difficult to guess. At present, we can only use trial and error one by one through exhaustive methods. According to the protocol, Nonce is a 32-bit binary value, which can reach a maximum of 2.147 billion. The Nonce value of the 100,000th block is 274148111. It can be understood that the miner started from 0 and calculated 274 million times before obtaining a valid Nonce value so that the calculated hash can meet the conditions.
If you are lucky, you may find Nonce in a while. If you are unlucky, you may have calculated it 2.147 billion times without finding the Nonce, that is, it is impossible to calculate a hash that meets the conditions for the current block body. At this time, the protocol allows miners to change the block body and start a new calculation.
7. Dynamic adjustment of difficulty coefficient
As mentioned in the previous section, mining is random, and there is no guarantee that a block will be produced in exactly ten minutes. Sometimes it can be calculated in one minute, and sometimes it may take several hours. No result. Overall, with the improvement of hardware equipment and the increase in the number of mining machines, the computing speed will definitely become faster and faster.
In order to keep the output rate constant at ten minutes, Satoshi Nakamoto also designed a dynamic adjustment mechanism for the difficulty coefficient. He stipulated that the difficulty factor should be adjusted every two weeks (2016 blocks). If the average block generation speed in these two weeks is 9 minutes, it means that it is 10% faster than the legal speed, so the next difficulty factor will be increased by 10%; if the average block generation speed is 11 minutes, it means It is 10% slower than the legal speed, so the difficulty factor of the next step must be lowered by 10%.
The difficulty coefficient is adjusted higher and higher (the target value is getting smaller and smaller), which makes mining more and more difficult.
8. Forks of the blockchain
Even if the blockchain is reliable, there is still an unresolved problem: if two people write data to the blockchain at the same time, that is to say, two people write data to the blockchain at the same time. Blocks join because they are connected to the previous block, forming a fork. Which block should be adopted at this time?
The current rule is that new nodes always adopt the longest blockchain. If there is a fork in the blockchain, it will look at which branch is behind the fork to reach 6 new blocks first (called six confirmations). Based on a block calculation of 10 minutes, it can be confirmed in one hour.
Since the generation speed of new blocks is determined by computing power, this rule means that the branch with the most computing power is the authentic blockchain.
9. Summary
Blockchain, as an unmanaged distributed database, has been running for 8 years since 2009 without any major problems. This proves it works.
However, in order to ensure the reliability of data, blockchain also has its own price. The first is efficiency. You have to wait at least ten minutes to write data to the blockchain. All nodes synchronize the data, which requires more time. The second is energy consumption. The generation of blocks requires miners to perform countless meaningless calculations. This is Very energy consuming.
Therefore, the applicable scenarios of blockchain are actually very limited.
There is no management authority that all members trust
The written data does not require real-time use
The benefits of mining can make up for its own costs
If the above conditions cannot be met, then the traditional database is Better solution.
Currently, the largest application scenario (and possibly the only application scenario) of blockchain is the cryptocurrency represented by Bitcoin.

❻ A friend asked me to buy UBank (Is UBEX a pyramid scheme?

In recent years, the number of projects in the currency circle has been increasing. There are not many reliable projects, and the models are all different. It is similar to a pyramid scheme, but this is a normal phenomenon, because the growth of each currency requires membership. To be fair, ubank is one of the better projects. It not only has its own main network, but is also an exchange itself and belongs to the token payment category. Please adopt the blockchain projects in the field, thank you

❼ A beginner’s guide to investing in digital currency (blockchain), just read this article

Blockchain and digital currency Compared with other investment methods, the entry barrier for investment is relatively high. Many friends want to invest in digital currencies but don’t know where to start or what to learn. Although 51 Coin has updated a lot of relevant information in the "Beginners Playing Coins" section Knowledge, but not systematic enough

This time we will systematically organize and summarize the information related to blockchain and digital currency investment, so that everyone can understand and invest in digital currencies faster and more conveniently< /p>

1. Understand blockchain and digital currency

No matter what you invest in, you must understand it. The same is true for blockchain and digital currency. Now about blockchain related information on the Internet There are many introductions, some are too profound, and some are not comprehensive enough. I personally think the video "100 Questions on Blockchain" produced by Huobi is better.

100 videos, all about blockchain Relevant knowledge includes: the birth of Bitcoin, operating principles, blockchain FAQs, mining, wallet introduction, etc., and it is all in the form of animated videos, which is easier for everyone to understand. Although the explanation is not detailed enough, it can give you a preliminary understanding Digital currency and blockchain

2. Choose a trading platform

After you have an understanding of digital currency, you can try to purchase a small amount of digital currency on the trading platform to experience the process. Digital currency Buying and selling must be completed through a trading platform, which is equivalent to a stock exchange in the stock market. It is recommended to choose a large trading platformA comprehensive trading platform with comprehensive currencies, convenient transactions, and guaranteed fund security

The following three platforms are recommended: Binance, Huobi, and OKEX (in no particular order)

3. Select a wallet

If digital currency is compared to cash, a wallet is equivalent to a bank card, used to store digital currency. There are many types of wallets, and the most commonly used ones now are mobile APP wallets (light wallets). Wallets are also divided into types. Different similar digital currencies cannot be transferred to the same wallet. For example, if imtoken is an Ethereum wallet, it can only store Ethereum and tokens issued based on Ethereum, but not other currencies

< p> There are also wallets that claim to support all digital currencies, but most of these wallets are not yet complete.

Of course, after we buy digital currency, we don’t need to deposit it into the wallet, but directly put it in the exchange account, which can save the handling fee and not be so troublesome. Large exchanges such as Huobi and OKEX are relatively It is safe. I personally basically put digital currencies on exchanges

4. Determine the investment plan

Before investing in digital currencies, we must first determine our investment plan and plan to invest. How much money, how much loss you can accept, what is the expected return, and how long the investment time frame is, determine it before investing. Digital currency is a high-risk, high-yield investment product. In the novice stage, you can invest only your spare money that does not affect your life. There is no limit on the amount of investment, and the minimum investment is a few hundred yuan.

Wait until you truly understand the market before making the appropriate investment. Increase the investment amount, but remember to keep the investment amount within your tolerance

5. Select the investment currency

After selecting the trading platform and confirming the investment plan, you can purchase Digital currency, so which one should we buy among so many digital currencies? When buying coins for the first time, it is recommended to choose mainstream coins. You can choose a few coins that you like among the top 20 in the market or recognized value coins

Find out what these coins are for and whether they are available. What is the actual value, what news has recently affected the currency price trend, etc.

Understand these issues before buying, and be sure to pay attention to the purchase price before buying

6. Common tools, Website

1. Non-small account: You can view information related to each currency and exchange, including currency price, historical price, increase and decrease, circulation volume, ranking and other information

2 , AICoin: The function is similar to that of non-small accounts. The K-line of aicoin is very convenient and easy to use. It is the first choice for watching K-line charts

3. Coin World: Real-time updates of news and information related to various blockchains and digital currencies

4. Golden Finance: A relatively comprehensive blockchain media platform, including news, news, quotes, celebrity columns, etc.

7. Learn more relevant knowledge

< p> Have the above 6 points asEven if we have initially learned about digital currency investment, we still need to learn more knowledge if we want to truly make money by investing in digital currencies. The two most important points are to deepen the understanding of blockchain and technical analysis (K line)

These two are too broad and cannot be learned overnight, so I will not introduce them, K You can find a lot of online knowledge on the blockchain. As we invest longer, understand more currencies, and come into contact with more related matters, we will gradually deepen our understanding

❽ How to make money with blockchain What is blockchain technology? Looking for video teaching materials

Comprehensive interpretation of blockchain technology

When the market generally believes that blockchain technology is just a technology, Ant Financial The blockchain team of the Service Technology Lab gave a calm explanation: Blockchain technology itself is not a specialized technology, but is integrated by many previous technologies. For example, it includes P2P networks, numerous nodes, and cryptography. Also includes something like consensus. So from this point of view, if we purely use previous technologies, blockchain technology will almost be formed in the end.

❾What kind of company is Ubeidi?

Ubeidi is not a formal company, it is a scam created by using concepts such as virtual currency and blockchain.

On March 31, 2021, China UnionPay issued a special statement, the full text of which is as follows:

Recently, our company has noticed that there are external promotion and distribution products in the name of "Ubeidi" on the Internet. Ubank digital asset UnionPay card, information on developing virtual currency and other businesses. After verification, China UnionPay has never carried out any cooperation with "Ubeidi" and has never issued Ubank digital asset UnionPay cards.

Here, UnionPay reminds cardholders to guard against scams created by using concepts such as virtual currency and blockchain, and to safeguard their legitimate rights and interests.

(9) How much is the entry fee for Ubeidi blockchain? Further reading:

Five departments including the China Banking and Insurance Regulatory Commission issued a reminder that, Some criminals use the banners of "financial innovation" and "blockchain" to absorb funds by issuing so-called "virtual currencies", "virtual assets" and "digital assets". Such activities are not truly based on blockchain technology, but are the result of hyping the blockchain concept to conduct illegal fund-raising, pyramid schemes, and fraud.

Such activities use "financial innovation" as a gimmick, but are essentially a Ponzi scheme of "borrowing new and repaying old", making it difficult to maintain long-term capital operations. The general public should view the blockchain rationally and not blindly believe in promises made by the public. They should establish correct investment concepts and effectively improve their risk awareness.