The principle of BTC image compression

2.

They are:

bitcoin

the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, the open source software was designed and released, and the P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system

bitcoin cash

bitcoin cash is a new version of bitcoin with different configurations launched by a small number of bitcoin developers

extended data:

virtual currency refers to non real currency. Well known virtual currency, such as network company's network currency, Tencent company's Q currency, Q point, Shanda company's voucher, Sina's Micro currency (used for micro games, Sina reading, etc.), chivalrous Yuanbao (used for chivalrous road game), silver pattern (used for bixue Qingtian game)

the popular digital currencies in 2013 are bitcoin, Leyte coin, infinite coin, quark coin, zeta coin, BBQ coin, pennies (Internet), invisible gold bar, red coin and prime currency. At present, hundreds of digital currencies are issued all over the world. Popular in the circle & quot; The legend of "bitcoin, Wright silver, infinite copper, pennies aluminum"

3. 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

5. Among the top ten digital currencies listed by the Wall Street organization fundstrat, BCH ranks first. Therefore, BCH has more investment value, flexibility and innovation
it is reported that Microsoft has accepted bitcoin cash deposit and zero confirmation instant payment, and there is no transfer fee for bitcoin cash recharge, which is different from the 1.2% transfer fee for bitcoin recharge. Another interesting phenomenon is that Microsoft has put BTC and BCH payment options on the "bitcoin" option on its website. Companies such as tor browser, overstock.com and eff also gave the same answer. The outside world holds a neutral attitude towards who is the real bitcoin. Let users choose for themselves and they will give the right answer
"a hundred legged insects, die but not stiff" is the most appropriate word to use in bitcoin. Bitcoin has been preconceived and has great influence in the society. In the short term, it is a mountain that is difficult to surpass. However, users will give the best choice according to their experience. As time goes on, BCH has low service charge, low cost and low cost The advantages of convenient payment will graally be recognized. At that time, Nokia used to be the dominant mobile market. At the peak of 2010, its market share was as high as 35%. When it was prosperous, it would decline. Because of its complacency, Nokia lost touch with the smartphone market and was acquired by Microsoft only three years later. It will take time to see whether bitcoin will follow Nokia's footsteps, but whether bitcoin cash can become a rising star is self-evident.

7. Technical team
the butterfly chain technology software team is an engineer team focusing on the research and development of the underlying infrastructure and surrounding tools of filecoin / IPFs
the team members have many years of experience in blockchain and cloud computing research and development. They are not only proficient in the underlying technology of large-scale public chains such as BTC / Ethereum / EOS, but also have accumulated profound experience in the field of large-scale distributed storage. Since 2017, he has participated in preaching IPFs technology stack and gathered a group of engineers who love IPFs protocol. At present, our energy mainly focuses on the contribution of filecoin open source code and the research and development of filecoin mine pool. Two engineers in the team have become the core contributors of go filecoin open source warehouse[ 5]
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a total of 2
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8.

In short, the principle of brick Arbitrage: buy low and sell high, buy money from the place with low price and sell it at the place with high price, that is to earn the price difference of different platforms

but there are three risks in moving bricks:

A. time difference of currency transfer: it takes a certain waiting time to pick up or deposit the currency, so it may miss the best trading time

B. currency price fluctuation: if the currency price fluctuation is relatively large and the process of moving bricks has not been completed, the price difference has disappeared

C. platform problems: some trading platforms may shut down services from time to time, or even run away

principle: carry out brick arbitrage on two platforms at the same time to avoid the risk of "time difference of currency transfer" and "currency price fluctuation"

before moving bricks: the brick moving platform must support the same currency transaction, and the brick moving platforms must be able to transfer currency to each other

Step 1: price difference calculation. There are handling charges for currency trading and currency transfer, so you have to calculate the cost according to your own funds. Only when the price difference reaches how much can it be profitable to move bricks

Step 2: simultaneous operation. Buy BTC on the low price platform and sell BTC on the high price platform. At this time, the number of BTC holdings remains unchanged and the number of usdt increases You need to pay attention to transaction fees.)

Step 3: balance funds. It is difficult to predict which platform has a lower price and which has a higher price e to the price difference. Therefore, the two platforms that move bricks need to prepare usdt and BTC. When the price difference appears, it is convenient to move bricks There are also handling charges for cross platform currency transfer.)

the above is the principle and steps of risk-free arbitrage using BTC and usdt. It also has a big name: quantitative hedging. The fundamental purpose is to earn usdt, not BTC

You can take a closer look at this: Web links

9. Brother, don't be lazy. It's too late for me to learn. It's really hard. These problems to the Internet with a search engine search a lot of ah... I don't even want to use the power of searching...