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How to broadcast when bitcoin is traded

Publish: 2021-04-21 05:42:56
1. In order to understand the technical principle of bitcoin, we need to understand two important cryptographic techniques: hash code: it converts a long string into a fixed length string, and its conversion is irreversible, that is, it is impossible to guess the original string from hash code. Sha256 is mainly used in bitcoin protocol
public key system: corresponds to a public key and a private key, keeps the private key in the application and publishes the public key. When Party A transmits information to Party B, it can use Party A's private key to encrypt the information, and Party B can use Party A's public key to decrypt the information, so as to ensure that the third party cannot impersonate Party A to send the information; At the same time, when Party A transmits information to Party B, it is encrypted with Party B's public key and sent to Party B, and then Party B decrypts it with his own private key, so as to ensure that the third party cannot eavesdrop on the communication between the two people. RSA is the most common public key system, but the lliptic curve digital signature algorithm is used in bitcoin protocol. What's the difference between cash and bank account? Bitcoin is an electronic currency in BTC. In this article, it is also used to refer to the whole bitcoin system. Like opening an account in a bank, the corresponding concept in bitcoin is address. Everyone can have one or more bitcoin addresses, which are used to pay and collect money. Each address is a string that starts with 1. For example, I have two bitcoin accounts, and. A bitcoin account is uniquely determined by a pair of public key and private key. To save the account, you only need to save the private key file. Unlike bank accounts, banks keep all transaction records and maintain the book balance of each account, while bitcoin's transaction records are jointly maintained by the whole P2P network through a pre agreed protocol. How much money is in my account address? Although the current account balance can be seen by bitcoin software, unlike banks, there is no place to maintain the book balance of each address. It can only calculate the account balance in real time through all historical transactions. How do I pay? When I pay from address a to address B of the other party, the payment amount is e. at this time, both parties will announce the transaction information to each network node, telling address a to pay to address B, and the payment amount is e. In order to prevent the third party from forging the transaction information, the transaction information will be encrypted with the private key of address A. at this time, the network node receiving the transaction information can use the public key of address a to verify that the transaction information is indeed sent by address a. Of course, trading software will help us do these things, we just need to input the relevant parameters in the software. What will the network node do after receiving the transaction information? This is the most important part of the bitcoin system, which needs to be elaborated. For the sake of simplicity, only bitcoin protocol has been implemented. In the current version, each network node will save all transaction information synchronously. There are two kinds of transaction information in history, one is & quot; Verified & quot; The transaction information, that is, the verified transaction information, is stored in a series of "blocks". Each & quot; block" Is the previous & quot; bock" The ID of each block is the hash code of the hash code of the block and the new transaction information (see an actual block). The other category refers to those who also & quot; Unverified & quot; The transaction information just paid above belongs to this category. When a network node receives new unverified transaction information (possibly more than one), it can calculate the book balance of each address at that time because the node keeps all the transaction information in history, so it can calculate whether the transaction information is valid, that is, whether there is enough balance in the payment account. After eliminating the invalid transaction information, it first takes out the last & quot; block" Then, the unverified transaction information is combined with the ID, and a verification code is added to form a new "block". It needs a lot of calculation to build a new block, because it needs to calculate the verification code, so that the above combination becomes a block, that is, the first several bits of the hash code of the block are 1. At present, the first 13 bits need to be 1 (generally, the specific method is uncertain), which means that if the block is generated by enumeration method, the average number of enumerations is 16 ^ 13. Using CPU resources to generate a block is called "gold mining", because the proction of the block will get a certain reward, and the reward information has been included in the block. When a network node generates a new block, it will broadcast to other network nodes. However, this network block may not be accepted by the network, because it is possible that other network nodes have proced the block earlier. Only the earliest block or the block with the largest number of subsequent blocks is valid, and the remaining blocks are no longer used as the initial blocks of the next block. How does the other party confirm that the payment is successful? When the payment information is distributed to the network node, the network node begins to calculate whether the transaction is valid (that is, whether the account balance is enough to pay), and attempts to generate blocks containing the transaction information. When six blocks (one direct block and five subsequent blocks) contain the transaction information, the transaction information is considered "verified", so that the transaction is formally confirmed, and the other party can confirm the successful payment. A possible problem is that I will pay the balance of address a to address B, and at the same time pay to address C. If I only verify that the single comparison transaction is valid. At this point, my way of cheating is to generate six blocks including B to B and six blocks including C to C before the truth is revealed. Because I need a very long CPU time to generate a block, compared with the whole network, the probability of my cheating success is very small. What is the motivation of network nodes to proce blocks? As can be seen from the above description, in order to make the transaction information effective, the network node needs to generate 1 and 5 subsequent blocks to contain the transaction information, and such block generation is very CPU intensive. How to let other network nodes help to proce blocks as soon as possible? The answer is very simple. The agreement stipulates that BTC will be rewarded for the address where the block is proced, as well as the Commission promised by both parties. At present, the reward for procing a block is 50btc, which will be halved every four years in the future. For example, the reward will be 25btc from 2013 to 2016. Is the transaction anonymous? Yes, and No. All bitcoin transactions are visible. We can check all transaction records of each account, such as mine. But what's different from the banking monetary system is that everyone's account itself is anonymous, and everyone can open many accounts. In general, anonymity is not as good as it claims. But bitcoin has another advantage in doing black market trading: it can't be frozen. Even if the police trace a bitcoin address, there is nothing they can do unless they trace the computer used by the exchange based on the Internet address. How to ensure that bitcoin does not depreciate? Generally speaking, in the case of equivalent trading activities, the value of money is inversely proportional to the amount of money issued. Unlike the traditional money market, the central bank can determine the amount of money issued. Bitcoin does not have a central issuing institution. Only by procing blocks can we get a certain amount of BTC currency. Therefore, bitcoin's new amount of money depends on: 1. The speed of procing blocks: bitcoin's agreement stipulates that the difficulty of procing blocks is fixed at an average of 2016 every two weeks, about 10 minutes. Moore's law of doubling CPU speed every 18 months will not speed up the proction of block. 2. The number of rewards for block proction: at present, 50 BTC is awarded for each block proced, which is halved every four years. In 2013, 25 BTC is awarded, and in 2017, 12.5 BTC is awarded. Considering the above two factors, bitcoin's currency issuing speed is not controlled by any single node in the network. Its protocol makes the currency stock known in advance, and the maximum stock is only 21 million BTC
2. Computers with bitcoin clients are called nodes, and all nodes on the Internet constitute a bitcoin network. Whenever a new bitcoin is generated and traded on a node, the node will broadcast to the nearby bitcoin node, and finally the whole network node will record the transaction information
in the bitcoin network, each node with a client installed has a distributed database to manage bitcoin proction, transaction, query account balance records, and update and record the latest records of changes in the bitcoin system
when you want to send 10 bitcoins to your friends. You need two things, one is the bitcoin address, the other is the corresponding private key. Bitcoin addresses are different from bank accounts. You don't need to sign a bunch of documents to apply for them. They are randomly generated, just a string of letters and numbers. The private key is also a similar string, but this is strictly confidential. The bitcoin address is like a transparent piggy bank. Everyone can see what's in it, but only the person with the private key can open it.
after you send the transaction application, the surrounding nodes will check whether your account has 10 bitcoins. If there are, they will agree to the transaction, and broadcast the message to the nearby nodes, which will be transmitted from one to ten, and from ten to 100, Soon the whole network will confirm the transaction information and write it to the block. Your friend will receive 10 bitcoins, and the transaction will be completed.
if you want to send small bitcoins, in theory, digital currency can be cut infinitely. At present, the smallest bitcoin unit is called "Nakamoto Tsung", which is equivalent to 0.00000001 bitcoins.
3.

there are two ways to trade bitcoin, one is spot trading, also known as currency trading, which requires the purchase of usdt (omnilayer protocol based digital assets released on bitcoin blockchain), and then the purchase of spot, and the other is futures trading. the futures trading is divided into delivery contract trading, which is generally a weekly contract, Next week contracts, quarterly contracts and perpetual contracts

6, when I successfully transfer my bitcoin recharge to the trading platform, I can sell my bitcoin on the trading platform. On the trading platform, click the "sell bitcoin" option under the trading column

7. Then select the type of order to sell, the quantity of bitcoin to sell, and click the "next order" button to continue

Similarly, the record of selling bitcoin can also be seen in the transaction query under the transaction column

9, when the transaction is successful, you can withdraw RMB to your bank card. Under account management on the left side of the page, click "RMB withdrawal", and then fill in according to the required format in the right pane. Finally, click the "withdraw" button

4.

Transaction mode of bitcoin

bitcoin is e-cash similar to e-mail, and both parties need "bitcoin wallet" similar to e-mail and "bitcoin address" similar to e-mail address. Just like sending and receiving e-mail, the remitter pays bitcoin directly to the other party through a computer or smart phone according to the recipient's address. The following table lists some websites that download bitcoin wallets and addresses for free

a bitcoin address is a string of about 33 characters long, consisting of letters and numbers, always starting with 1 or 3, such as & quot& quot; Bitcoin software can generate address automatically, and it doesn't need to exchange information online, so it can be offline. More than 2 bitcoin addresses are available. Figuratively speaking, there are about two grains of sand in the world. If there is an earth in each grain of sand, then the total number of bitcoin addresses far exceeds the number of all the sand on all these "earths"

the bitcoin address and private key appear in pairs, and their relationship is just like the bank card number and password. A bitcoin address is like a bank card number, which records how much bitcoin you have on it. You can generate bitcoin address at will to store bitcoin. When each bitcoin address is generated, a corresponding private key of the address will be generated. This private key proves that you have ownership of the bitcoin at that address. We can simply understand the bitcoin address as the bank card number, and the private key of the address as the password of the corresponding bank card number. Only when you know the bank password can you use the money on the bank card number. Therefore, please keep your address and private key when using bitcoin wallet

after the transaction data of bitcoin is packaged into a "data block" or "block", the transaction is initially confirmed. When a block is linked to a previous block, the transaction is further confirmed. After six block confirmations in a row, the transaction was irreversibly confirmed. Bitcoin P2P stores all transaction history in a "blockchain.". The blockchain continues to extend, and once new blocks are added to the blockchain, they will not be removed. Blockchain is actually a distributed database composed of a group of scattered client nodes and all participants, which is a record of all bitcoin transaction history. Nakamoto predicts that when the amount of data increases, users hope that not all the data will be stored in their own nodes. In order to achieve this goal, he uses the hash function mechanism. In this way, the client will be able to automatically eliminate those parts that it will never use, such as some very early bitcoin transactions

5. Who can you complain about making bitcoin? You go to the police to see if anyone cares about you. If you don't master the domestic investment environment, you follow blindly. There are no strict laws and regulations for virtual currency in China. The state certainly doesn't recognize it. Although it doesn't break the law, it's also illegal! No matter what reasons, including platform can not cash, others take you malicious losses, etc., you have no way! Save it
6. 21 towns
chenzhen

xielongqiao town

Nanzhao Town

Yangzhen town


60pu town


Jiangkou town


new town of gengpang town

/ & gt; Bangang

Wanggang town

xialongqiao town

jiangdianzi town

chenzhen, br / & gt<
Huangqiao town

Pali Wenchang River

Di Town

xi30pu town

br / & gt
Hongxing town

Lu town 18pu town

& lt;

Shengtang Xiang

Liu Jixiang

ancient city and countryside

52 Puxiang


Huanghua town. Guagang township of Zigui

saisaijian Hui Township

Guantun township of Yingshang County is located at the intersection of Huaihe River and Yinghe River and the southernmost end of Huanghuai Plain? The county has a land area of 1859 square kilometers, 107000 hectares of arable land and a population of 1.6 million. It has jurisdiction over 30 towns, 346 Village (neighborhood) committees, national ecological demonstration area, plain tourism county and coal power energy city. In 2004 and 2005, it entered the top ten counties with the most development potential in Anhui Province for two consecutive years. In 2005, the economic competitiveness of 100 counties (cities, districts) increased the fastest. The GDP of the county was 5.63 billion yuan in 2006, an increase of 15.1% over the same period of last year; The investment in fixed assets was 2.65 billion yuan, an increase of 76.7% over the same period of last year, and the total financial revenue was more than 5 million yuan, an increase of 19.1% over the same period of last year, ranking 10th in the province<

Yingshang County has a long history and outstanding people?? Spirit. In the spring and Autumn period, the Qin and Han Dynasties collected Shen County, and in the Sui Dynasty (AD 606), Loufan County was named Yingshang County, which has been more than 1400 years. Here is the cradle of "Xianghuan, tyrant, Prince, peer world". Guan Zhong is an outstanding statesman in the spring and Autumn period. Guan's academic monograph records his own thoughts, which are profound, eternal and shining with glorious truth“ He was born a permanent academic master Xia, a literary master Dai Houying, academician Zheng Shouren of the Chinese Academy of Sciences and the Chinese Academy of Sciences, and a celebrity Liu Guoliang of Chen. Yinghe willow of Huaihe River witnessed their growth footprint, created a long history and cultural characteristics, different cultural landscapes, its long cultural tradition and profound cultural heritage, unique Huaihe River Basin, Yingshang huagudeng Oriental ballet, the first batch of national intangible cultural heritage approved by the State Council. Guanbao temple, a provincial-level cultural relic protection unit, is elegant and quiet with green bricks and gray tiles. It is not the Soviet style garden style, especially the entrance garden, "although it is made by people, it is just like the sky". Yingshang was created by people. Because of the reform and opening up, the reputation of XIAOZHANGZHUANG and balihe, two eco-friendly "global top 500", miracles have appeared. Located in Zhangzhuang enjoy the reputation of the vast fairyland, China's first eco-tourism agriculture. Balihe scenic spot and digou scenic spot have been rated as national AAAA scenic spots. South of the Yangtze River is worth the scenic spot of balihe Lake Park. The spectacular lake scenery is picturesque. Digou scenic area integrates natural ecosystem, urban garden and Buddhist holy land, which makes people forget to return. In 2005, Yingshang County was rated as one of the first batch of Anqing county?? Anhui Province is a county with strong tourism economy. Yingshang County receives 2 million tourists every year, becoming a rapidly rising tourist resort in the Central Plains of Yingshang County

Yingshang County has beautiful chemical fertilizer resources. Located in the northern and southern climate transition zone, it has four distinct seasons and mild climate, especially in the area with abundant water resources. It is known as "five rivers, three bays and 72 lakes". The water area is 25000 hectares, and the total amount of water resources is 8.76 billion cubic meters every year, of which 495 million cubic meters of surface water has been invested in Linhuaigang flood control project and a number of key projects have been completed, The Huaihe River Basin has been put into use for thousands of years, ending the frequent flood disasters in Yingshang. Yingshang is rich in grain, fruits, vegetables, livestock, poultry and aquatic procts. Its total output ranks first in Anhui Province. It is one of the top 10 counties in Anhui Province. It is the hometown of rabbit in the whole province, the county of grain proction in the whole country, the county of green top 100 in the whole country, the county of advanced water conservancy construction in the country, the county of ecological agriculture demonstration in the whole country and the county of labor export demonstration in the whole country, Yingshang is rich in mineral resources, nearly 100 million tons. The iron ore reserves in the northern part of the county within 300 square kilometers need to be developed. It contains more than 100 tons of high-quality coal. Xieqiao coal mine, a large state-owned coal mine, has been completed and put into operation with an annual output of 8 million tons. Liuzhuang, a key energy construction project in the 11th five year plan, is designed to have an annual output of 8 million tons. It is a first-class safe, efficient, environmental friendly and digital super large mine in China. It was completed and put into operation on October 18, 2006. The raw coal output of Xieqiao coal mine in Liuzhuang will reach 100000 tons, and the construction of Luoyuan coal mine with an annual output of 3 million tons in 2010 will start soon. In Yingshang County, the output of raw coal will exceed 22 million tons in 2010. × The 600 MW Liuzhuang power plant has an investment of 500 million yuan, and the aid center of the instrial division of the state investment Xinji group is under construction. Relying on the coal resource planning, it has entered the evaluation stage, and the national development and Reform Commission. The leader of Yingshang coal chemical instry base planning has completed the total investment of RMB 6300 billion in coal gasification, the development direction of synthetic ammonia, coal and oil, and is docking with large domestic well-known enterprises, which is expected to be implemented in the near future. County coal, coal chemical instry chain, to create broad prospects for the development of Ying building energy saving in eastern China's cities, and even the whole country

Yingshang location, superior geographical location, convenient transportation. Located in the hinterland of the open Huang Huai plain, it has the geographical advantages of North and south, East and West. Fuyang Huainan railway runs through the whole territory. Beijing Kowloon, Tianjin and Shanghai lines are less than 60 kilometers away from Fuyang station and Fuyang airport, which are important parts of Beijing Kowloon Railway. The planning and construction of Hefei Huainan Fuyang Fuyang Liuan Expressway and anqing highway in Huaibei are in the whole county, Beijing Shanghai Expressway in the East, national highway 102224328 105 at the intersection of Beijing Zhuhai Expressway in the west, and provincial highway in the territory. Asphalt roads and rural roads of rural towns in county towns. The Huaihe River, Yinghe River and Yingshang river flow through the whole county for more than 200 kilometers, forming a traffic network of railway, highway and waterway. Complete the optical fiber transmission, digital, river and sea. Switching, mobile communications and other modern communication networks cover the whole county
Yingshang gets fresh hair rising rapidly. After the ups and downs and arous exploration, Yingshang people have embarked on a road of enriching the people and strengthening the county, and people-oriented scientific development. Since 2004, the county Party committee and the county government have established Hebei Province, with instry as the core, agriculture as the foundation, trade and tourism as the driving force, to promote the leap forward development and build a harmonious development, investment and project novelty construction. It has become one of the top ten counties and provincial health civilization counties in Anhui Province. It was built in 2010 to build a strong and dynamic city, Charming socialist harmonious society, Yingshang County people share the goal of a decent, dignified and valuable happy life. Yingshang in 2004 for the first time into the top 10 counties in Anhui Province, the most potential development, the comprehensive economic strength increased to 21 by 2003, the province's 61. In 2005, with the further accelerated dynamic index, the province ranked the first 5, ranking the 13th in the province's comprehensive economic strength; Three times instrial structure adjustment to the second and third, 3, 2, 1, the instry has become the leading instry of the county economy, Yingshang instrial structure optimization and upgrading to achieve a historic breakthrough leader, has confirmed that the development of county economy in Anhui Province is a huge potential dark horse, in 2006, on the basis of two consecutive years of sustained and rapid growth, It has also achieved a higher level of development, the main economic indicators show a strong trend of double-digit growth, the development of various social undertakings, in particular, to solve a large number of historical problems accumulated over the years, which seriously affect the health and balanced development, Yingshang and Yingshang have comprehensively accelerated, laid a solid political, economic and social infrastructure, and strived to leap forward

today's Ying is full of vitality, vigor and hope, showing brilliance, magic and brilliance. Taking advantage of the time, the location, the people and the hard wound, in the golden unprecedented important strategic opportunity. In the East, the development strategy of Yingshang County in Anhui Province is to speed up the implementation of economic development policy. In the north of He county in Anhui Province, the core strategy of central China is to speed up development. The implementation of the "5511" plan, the five pillar instries of "coal, chemical instry, papermaking, pharmaceutical, agricultural procts processing", the five basic overall goals of key construction, the efforts of the county's engineering, flood control and drainage, comprehensive transportation, urban construction, culture, and talent County, and the implementation of the "5511" plan, promote the growth of "coal, chemical instry, papermaking, pharmaceutical, agricultural procts processing" are the good governance of the county, seize the opportunity, comprehensively accelerate, and strive to leap forward, To establish the country's eco-tourism base, and strive to achieve the first two goals. The total investment is 650 million yuan. Among them, 43 projects have been included in the city's "6611" project. They have been completed and put into proction in 72 years. They have successfully completed the technical transformation and the construction of Xieqiao coal mine railway special line. 224 provincial roads and Nanhu avenue have been reconstructed and opened to traffic; The project of Liuzhuang power plant is in the evaluation stage, and the coal chemical instry planning and circular economy instrial park planning are completed by the file manager. The completion of the implementation of key projects and major projects has greatly promoted the rapid development of Yingshang. In 2006, the total output value of instries above designated size was 30.3 billion yuan, with a year-on-year growth of 19.3%. The added value of instries above designated size was 1.38 billion yuan, with a year-on-year growth of 24.7%. The proportion of proction in the tertiary instry rose to 38.6%, further consolidating its leading position in the instry, and further strengthening the role of county economy in supporting economic growth. Many small and medium-sized enterprises have sprung up and flourished. The average wage of cities and towns with rapid growth is 20276 yuan, up 17.2% year on year; The per capita net income in rural areas was 2233 yuan, up 14% year on year, and the balance of urban and rural savings deposits was 51.2 billion yuan, up 17.4% year on year. Since the beginning of 2007, the development momentum is strong. In the first quarter, the instrial added value increased by 32.6%, the total retail sales of social consumer goods increased by 15.2%, the investment in fixed assets increased by 69.3%, the income increased by 48.7%, the average wage increased by 23.4%, and the per capita cash income of farmers increased by 15.7%, which exceeded the best level of development in the history of the same period. The county economy has entered a period of sustained and rapid growth, the overall strength of the rapid growth of the total economy, the people of the people, in order to fully enjoy the achievements of reform and development

in recent years, Yingshang has made all-round progress in social undertakings. It involves tens of thousands of people to properly solve the long accumulated problems left over by history. After ten years of delay, the reform of the party and government institutions in a county in 1998 has been carried out smoothly and basically completed. And villages, as well as the 17th National Congress of the Communist Party of China held in 2006 and County People's Congress
7.

blockchain has rich application scenarios

blockchain is essentially a decentralized database, which is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. Blockchain can solve the problem of information asymmetry and realize the cooperative trust and concerted action among multiple agents, which has a wide range of application scenarios



-- for more data, please refer to the analysis report on market prospect and investment strategic planning of China's blockchain instry issued by foresight Instry Research Institute

8. Bitcoin receives payments almost instantaneously. However, there is an average delay of 10 minutes before the network starts adding your transaction to a block to confirm the transaction and that you can use the received bitcoin. Confirmation means that there is a consensus on the Internet that the bitcoin you receive is not used to pay others, so it is recognized as your property. Once your transaction is included in one block, all subsequent blocks will include it, which will greatly consolidate this consensus and rece the risk of transaction cancellation. Each user can determine the time when the transaction is confirmed, but generally speaking, receiving six confirmations is as safe as waiting six months after a credit card transaction
only full node clients like bitcoin core need longer synchronization time. Technically, synchronization is a process of downloading and verifying all previous bitcoin transactions on the network. Some bitcoin clients need to know all previous transactions to calculate the available balance of your bitcoin wallet and complete new transactions. This step consumes a lot of resources and needs enough bandwidth and space to store the whole block chain. In order to maintain the security of bitcoin, enough users need to use the full node client, because they play the role of confirmation and relay transactions.
9. First of all, bitcoin can not be regarded as currency. Second, bitcoin is a reward of incentive system. When a transaction is generated, people who broadcast to the whole network, judge the transaction and help the broadcast will get a reward (bitcoin)
10.

Two statements for reference are found from Babbitt:

  1. bitcoin adopts a mathematical contest to determine the time when a transaction arrives at a node, and at the same time to protect this order. In bitcoin system, transactions are sorted by group allocation, Such groups are called blocks (transactions occurring at the same time will be divided into the same block), and then these blocks are linked together, which is called blockchain. Blockchain is used to sort transactions, while the transaction chain tracks and records the change of bitcoin ownership. These blocks are arranged according to time, which is a link. Transactions not in the block are called unconfirmed or unsorted transactions, and any node is about to put a group of unconfirmed transactions into the block, Then broadcast their suggestions about what the next block should be to other nodes in the network
    If multiple people generate blocks at the same time (the probability is very small), there will be multiple choices for the next block of the current block. In order to ensure the sequence of block links, the bitcoin system requires each effective block to include the answer to a special mathematical problem, and the computer calculates the text of the whole block, In addition, random guessing based on encrypted hash can be done until an output lower than a certain value is obtained. Hash function can create a short summary from any length of text. This fixed output value is very complex. The only way to find it is random guessing, which is called mining

  2. when King released PPC last year, it introced checkpoint mechanism to protect against attacks in its early development. This mechanism enables it to resist 51% attacks. " Developers can control a parent node and broadcast "checkpoints" to the whole network, which allows other nodes to agree on certain blocks“ This is actually a [blockchain] continuity warning message, "he said< br />

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