Zcash calculation
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has a high market value, and ethereal classic is well-known in the top 15
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in the market value of digital currency market. As a forked currency of Ethereum, Ethereum has a certain reputation
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and relatively stable fluctuations. Compared with air currency, Ethereum classic is less volatile
a better digital currency trading platform "currency exchange"
POW: full name of proof of work
pos: proof of stake
both of them are the consensus mechanism of blockchain and the bookkeeping method of digital currency
the difference is:
1. POW mechanism: workload proof mechanism, that is, the proof of workload, is the requirement that must be met when generating a new transaction information (that is, a new block) to be added to the blockchain. In the blockchain network based on workload proof mechanism, the ability of nodes to obtain the correct numerical solution to generate blocks by calculating the numerical solution of random hash hash is the specific performance of node computing power
POS mechanism: the proof of rights and interests requires the certifier to provide a certain amount of ownership of cryptocurrency. The operation mode of the proof of rights and interests mechanism is that when creating a new block, the miners need to create a "currency right" transaction, and the transaction will send some coins to the miners themselves according to the preset proportion. According to the proportion and time of token owned by each node, the equity proof mechanism reces the mining difficulty of nodes proportionally according to the algorithm, so as to speed up the speed of searching for random numbersextended materials:
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, the open source software and the P2P network on it were designed and released. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of currency circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction
From the current mainstream blockchain projects, blockchain projects are mainly divided into four categories: the first category: currency; The second is platform; The third category: application category; The fourth type: asset token
currencies mainly act as the "exchange media" in the field of blockchain assets, and the exchange media refer to general equivalents, such as gold and silver bills in the past< (currency exchange on trading blockchain assets)
platform projects refer to the establishment of technical platforms to meet the needs of various blockchain application development, which can rece the threshold of application development on blockchain
application projects cover a wide range of fields, including finance, social networking, games, property rights protection, etc., and are also the fastest growing fields of blockchain assets
asset token project refers to the blockchain mapping of physical assets, that is, the physical assets on the chain. At present, there are no more than 10 varieties
01 currency
the first category is currency project, which is also the earliest blockchain project. Currency projects mainly include bitcoin and lightcoin. In addition, there is another kind of asset with the characteristics of anonymity. Its main functions include protecting the privacy of both sides of payment while realizing payment. The well-known ones are dash, monero and zcash. Currency is mainly used as the "exchange medium" in the field of blockchain assets. The exchange medium is the general equivalent you use to exchange goods. For example, gold, silver and silver bills can be used as the exchange medium in the past. At present, there are more than 2100 types of digital assets in the world, and the number of currency blockchain projects has increased rapidly recently. As of June 2018, bitcoin is still the largest market value
02 platform type
the second type is platform type blockchain project. The main function of platform type blockchain project is to establish a technical platform to meet the technical requirements of various blockchain application development; In short, platform applications allow developers to directly issue digital assets and write smart contracts on the blockchain. Smart contract is a computer program running on the blockchain database, which can be automatically executed under the conditions of its source code setting
for example, you develop a smart contract based on the house rent protocol on the blockchain. When the owner receives the rent, it will trigger the automatic execution and give the security key of the apartment to the tenant
the main function of platform blockchain projects is to establish the underlying technology platform, so that developers can do application development on the underlying technology platform. A considerable number of platforms are still in the development state. As of June 2018, Ethereum has the largest market value
03 application
the third category is application blockchain projects. Application projects are blockchain projects based on blockchain development platform (such as Ethereum), which can solve many problems in various fields of the real economy
for example, augur, Golem, vechain, omisego, which provides asset exchange and transfer services. Using blockchain technology, these projects can better solve the problems of trust and cross-border circulation. At the same time, using smart contracts and tokens on the blockchain, they can better realize automatic execution and greatly improve the efficiency of social and economic activities. Application blockchain projects cover a wide range of fields, including finance, social networking, games, property rights protection and so on. It is also the field with the fastest market value increment of blockchain projects at present
04 asset token
the fourth category is the asset token blockchain project. Asset token refers to linking the blockchain assets to physical assets such as gold and US dollars, which is the blockchain mapping of physical assets. As of February 2018, there are no more than 10 varieties. The typical representatives are usdt against US dollars, digix Dao against gold, Digix each token represents 1 gram of Gold Certified by the London Bullion Market Association. Asset token has the advantages of convenient transaction and safekeeping. First of all, asset token is more convenient for transaction. Because blockchain assets can be split, it has better liquidity
for example, at present, real estate needs to be transferred as a whole. If the real estate can be token, it can be split and purchased, which is more convenient for transaction. Secondly, the token of physical assets is more concive to custody. Gold is easy to wear out and cause losses in physical transactions, but there is no need for physical transfer after the token of physical assets, which is more concive to the custody of physical assets
the advantage of the video card miner is that it can dig other coins after one coin is collapsed. AISC mining machine is more efficient, but it can only dig a single currency.
are there multiple client applications? There are two schools of thought. One assumption is that a single normative client application can concentrate limited resources on one project, and a development team can communicate more easily, which will maximize the success rate and competitiveness compared with other platforms. In addition, a single client application can prevent consensus failure caused by local account book inconsistency of different nodes (at least as long as each node upgrades its software after hard forking). On the other hand, the existence of multiple clients will make the network more likely to survive attacks (one client may stop block proction completely) or consensus failure (one or more clients cannot run the protocol correctly, which may lead to wrong block or stop block proction completely). In fact, both happened in Ethereum. But there are more subtle reasons. Firstly, the parallel application of multiple clients reces the dominant influence of a single core development team on the network, which is one of the biggest problems of bitcoin governance (zcash foundation will also decide to build a second zcash client to balance the power of electric coin). Moreover, different clients may make different architecture decisions and have different advantages (for example, mining, data search), and using different languages to write clients can enable more developers to participate in core development. Although parallel applications and beta applications are very good, the mainstream is the main network client: for example, bitcoin has at least 15 client applications, but 97% of the nodes run a program, that is, bitcoin core
how many organizations control mining computing power? The more parties involved in mining, the more difficult it is to collude with each other to engage in selfish mining, or to engage in double flower attacks (commonly known as 51% attacks, but the actual mathematical principles are more complex). This is not a hypothetical risk, as it has occurred in networks such as Ethereum classic and bitcoin gold. In addition, more miners means a fairer distribution of mining rewards. Although many indivial miners may participate in mining, because of incentives, they will gather in a few mines, and even a seemingly decentralized network may rely on a few entities for Mining: the three largest Ethereum mines jointly control 60% of the total power, while bitcoin's top four mines account for about 56%.
Aries clothing = constellation badge + sheep BAABAA (sheep Baa Baa is bought in the mall, gold coins × 20)
Gemini clothing = constellation badge + double row chocolate (double row chocolate can be mined). Pure guess luck)
Leo clothing = constellation badge + love gift box (love gift box mining can get, also can buy from players)
Virgo clothing = constellation badge + snow wool (snow wool can raise sheep, also can buy from other players)
Taurus clothing = constellation badge + Taurus (Taurus can buy in the mall, gold coins) × 2)
Scorpio clothing = constellation badge + Blue Crystal (blue crystal can only be obtained by mining)
Sagittarius clothing = constellation badge + Cupid's arrow (Cupid's arrow can be purchased from other players or sent by your boyfriend / girlfriend)
Capricorn clothing = constellation badge + wool (wool can raise sheep by itself, You can also buy it from other players)
Pisces costume = constellation badge + Aquarium (aquarium can go to mine, open treasure box and buy it from other players)
Aquarius costume = constellation badge + Black T-shaped water pipe + black straight water pipe (two items can be purchased from other players through mining)
I have finished this task for Libra costume and cancer costume. So I forgot what I needed.