Classification of digital currency application industry

1. digital currency is abbreviated as digiccy, which is the abbreviation of "digital currency" in English. It is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy

digital currency is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of a specific virtual community. The European Banking authority defines virtual currency as a digital representation of value, which is not issued by the central bank or authorities, nor linked with legal currency. However, because it is accepted by the public, it can be used as a means of payment, or it can be transferred, stored or traded in electronic form
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2. bitcoin, of course, is the hottest one. In addition to bitcoin, there are also:
1. Litecoin is similar to bitcoin, which is also an encrypted digital currency, and its price has risen sharply recently. It is a P2P open source digital currency, which can be regarded as a branch of bitcoin. However, although lightcoin is based on bitcoin protocol, it does not require very high computing power. It can also be mined using ordinary computers. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
2. Namecoin
namecoin is also based on bitcoin, which is another branch of open source. Namecoin is a distributed DNS protocol -- generally speaking, it can transform the website name (such as ifeng. Com) that can be understood by human into the address that can be understood by machine. As its own DNS, this kind of currency can operate outside the normal Internet, so it can break away from the control of ICANN
the monetary value and domain name of namecoin are stored in the user's blockchain records, limiting the total number to 21 million
3. Peercoin
peercoin is a peer-to-peer variant of bitcoin, which can improve mining efficiency and security, and improve safeguard measures to avoid group mining. Now, group mining has been considered as a potential defect of bitcoin. According to the statistics of emerging currencies by coinmarketcap.com, peercoin currently ranks fourth in the market value of digital currencies
4. Primecoin
primecoin is a cryptocurrency similar to bitcoin, but it uses a completely independent mining algorithm. Bitcoin uses the hashcash algorithm, while prime coin uses the long Cunningham chains to create the value of money - a sequence of prime numbers named after mathematician AJC Cunningham
in the process of bitcoin mining, as the amount of money goes on, the difficulty will increase sharply. But prime is different. Every time a primecoin is mined, the mining difficulty will increase slightly, and the process is much more stable< 5. Feathercoin

based on the design of litecoin, released in April 2013, can adjust the mining difficulty more frequently than litecoin. Feathercoin will be updated frequently, adding new features and improvements to eliminate malicious mining behavior

6. Novacoin

another P2P digital cryptocurrency. Novacoin is different from most other currencies in that it integrates a protection mechanism in the currency core, which can identify illegal mining activities

the total number of novacoin is limited to 2 billion, which is considerable. If necessary, the total can be adjusted upward

7, infinitech

published in June 2013. A by-proct of litecain. According to the mining situation and the total amount of money, infinite money can frequently adjust the mining difficulty ratio< Megacoin was only released in the fourth quarter of 2013, imitating bitcoin in the early stage. The total number of megacoin is limited to 42 million, which can be mined like other virtual currencies. Its biggest selling point is brand publicity, which other digital currencies lack< It was released in 2013 and is still in its infancy. In the security part of quarkcoin, nine independent loops are deployed and six different algorithms are used.

4.

Generally, the excellent digital currencies are mostly imported procts, such as bitcoin, Leyte coin, ether coin and so on. However, the domestic Yuanbao coin, Ruitai coin, bitcoin and the tokens of different crowdfunding projects of European crowdfunding are excellent digital currencies

< H2 > development materials

digital currency (English: digital currency) is an alternative currency in the form of electronic currency. At present, no central bank of any government has indicated that it will issue digital currency, and digital currency does not have to have a benchmark currency and a central bank

it is different from the virtual currency in the virtual world, because it can be used for real goods and services transactions, not limited to online games. The early digital currency (digital gold currency) is a form of electronic currency named after the weight of gold. Today's digital currency, such as bitcoin, lightcoin and ppcoin, is an electronic currency created, issued and circulated by check sum cryptography

5. If you want to invest in digital currency, it is recommended to use Chinese currency. In the group chat of tens of thousands of people, you can send these questions in real time. I believe it will be faster and more convenient to know the answers than on the Internet. Hope to help you.

6.

Generally speaking, blockchain wallet is used to store digital currency. In fact, blockchain wallet does not store digital currency, but a tool to store key (private key and public key). With the key, you can have the right to control the digital currency in the corresponding address, and use the digital currency collection address generated in blockchain wallet, You can accept the digital currency transferred to you by others, and you can also transfer the digital currency you own to others.

classification of digital currency wallets:

can be roughly divided into two categories, hot wallet (online wallet) and cold wallet (offline wallet)

first, hot wallet

Hot wallet is also called online wallet, It includes light wallets and heavy wallets (all node wallets). The wallets that need to be connected to the Internet can be directly traded

1. Light Wallet:

does not store the complete blockchain, only stores the data related to itself. It is small in size and can run on mobile phones, computers, web pages, etc

advantages and disadvantages: it does not occupy memory, supports a variety of digital assets, has a good user experience, is fast for novices, but transaction verification is a little slow

2. HEAVY WALLET (full node wallet)

maintains all blockchain data, completely decentralizes and synchronizes all data. It has better privacy and can verify the validity of transaction data locally

advantages and disadvantages: it has better privacy and faster verification of information, but it needs to synchronize data before each use, takes up a lot of hard disk space, and does not support multiple digital currency transactions

Second, cold wallet

cold wallet is not connected to the Internet, also known as offline wallet; For example, professional hardware devices, or private keys (mnemonics) written on paper

1. Hardware wallet

Hardware wallet is to store digital currency with professional hardware, store the private key of digital assets in a chip, isolate it from the Internet, and plug and play

2. Paper wallet

the advantages and disadvantages of writing the private key on paper and then deleting

cold Wallet:

is relatively safe, but it is very troublesome to create a wallet and trade. It is difficult for novices to operate, and the price of wallets is relatively expensive, generally ranging from thousands to tens of thousands of yuan. If you don't have a large amount of digital assets, you don't need to consider

generally, it's recommended for novices to use light wallet. Light wallet is easy to operate and easy to use. Personal used geekwallet

simple and convenient light wallet supports bitcoin (BTC), lightcoin (LTC), Ethereum (ETH), EOS Storage and management of mainstream digital currency assets such as usdt

using bip44 mnemonics, local private key, off-line signature and other security mechanisms, as well as mobile phone and computer al backup strategy, completely solve the loss of digital currency assets caused by hacker attack, virus infection, mobile phone loss, forgetting mnemonics and other ways, and provide users with online Multi Chain digital assets one-stop management service. The platform also has tiaoshao market, which can carry out token trading of physical assets on the chain

7. Chainstore is a professional application store that integrates all the mainstream applications of blockchain and coin circle. It integrates exchanges, wallets, quotation software, tool software, blockchain information, blockchain games, instry applications, etc
different from other app stores, chainstore can not only download blockchain instry applications, but also browse the latest airdrop candy information and high-quality blockchain projects. It is an app that provides comprehensive services for the blockchain instry.

8. Mining right contract

made by Changsha Bureau of land and resources

mining right contract

Article 1 both parties of this Contract:
transferor: Changsha Bureau of land and resources, Hunan Province, people's Republic of China
transferee:
according to the mineral resources law of the people's Republic of China, the Interim Provisions on the administration of mining right transfer, the According to the contract law of the people's Republic of China and other laws and regulations, both parties enter into this contract on the principle of equality, voluntariness, compensation and good faith
Article 2 the transferor transfers the mining right according to the authorization of the law, and the ownership of the mineral resources transferred belongs to the people's Republic of China. The state has jurisdiction and administrative power conferred by the Constitution and the law, as well as other powers exercised by the state in accordance with the laws of the people's Republic of China and rights and interests necessary for the interests of the public. The state ownership of mineral resources does not change with the land ownership or the right to use. The land use right attached to mineral resources does not belong to the scope of mining right transfer
Article 2 the mineral resources transferred to the transferee under this contract are located in
, and the inflection point coordinates of the mining area are shown in the annex for details, with the mining area of square kilometers and the mining depth of meter meter meter
Article 4 the main mineral species of the mineral resources transferred under this contract are: the mining method is mining, and the mining method is mining method< Article 5 the transferor agrees to deliver the transferred mineral resources to the transferee before (mm / DD / yyyy). According to the resource reserve evaluation report provided by the geological exploration unit, the transferred resource reserves under this contract are recoverable reserves tons
Article 6 according to the approved development and utilization plan of mineral resources and the mineral resources reserves within the mining scope, the service life of the transferred mine under this contract is years, and the proction scale of the mine is tons / year
Article 7 according to the relevant provisions on payment of mining right price, the price of the transferred mining right under this contract is RMB (in figures). Among them, yuan was handed over to the Provincial Department of land and resources; Turn over to Changsha Bureau of land and resources yuan; Turn in county (city)
yuan. However, the price of mining right stipulated in this contract does not include registration fee, mining right use fee and mineral resource compensation fee, and the transaction expenses of mining right have been dected
Article 8 the transferee agrees to pay the price of the mining right to the transferor in accordance with the provisions of paragraph () of this article, and pay it separately according to the amount determined by the transferor
(1) within days from the date of signing this contract, the above mining right price shall be paid in one lump sum
(2) pay the above mining right price to the transferor in installments according to the following time and amount
the first installment is RMB in words (in figures), and the payment time is before mm / DD / yyyy
the second installment of RMB in words (in figures), payment time: before mm / DD / yyyy
the third installment of RMB in words (in figures), payment time: before mm / DD / yyyy
the fourth installment of RMB in words (in figures), payment time: before (mm / DD / yyyy)
in case of policy adjustment, the new policy shall be implemented< Article 9 the grantee agrees to complete the infrastructure construction of the mine and start mining mineral resources before
if the mineral resources cannot be mined on schele, it shall be reported to the transferor in advance
Article 10 the grantee must organize proction in strict accordance with the mining area, mining types, proction scale, mining methods and mining methods specified in the approved plan for the development and utilization of mineral resources, so as to ensure the rational and effective utilization of mineral resources and the safe proction of the mine< Article 11 in case of any of the following circumstances ring the period of validity of the mining license, the transferee shall go through the change registration with the original license issuing authority:
(1) expand or narrow the scope of the mining area
(2) change of main mining minerals< (3) change of mining method< (4) change the name of mining enterprises
Article 12 the Grantee shall not transfer the mining right to another person for mining operation by means of contracting. If it is necessary to transfer the mining right, both parties to the transfer must apply to the original license issuing authority and go through the change registration proceres after examination and approval
Article 13 the transferee must take the initiative to accept the supervision and management of the transferor and submit the annual report to the transferor. If the grantee needs to continue mining after the expiration of the mining license, he shall apply to the original license issuing authority for registration of renewal 30 days before the expiration of the mining license
Article 14 in case of any potential safety hazard or damage to geological environment ring mining, the transferee shall immediately stop proction, report to the local people's government and relevant competent departments in time, and do a good job in rectification of potential safety hazard and treatment of geological environment
Article 15 the transferor shall not take back the mining right legally obtained by the transferee before the expiration of the service life stipulated in this contract. Under special circumstances, if the mining right needs to be withdrawn in advance according to the social and public interests, the transferor shall apply for approval in accordance with the legal proceres, and give corresponding compensation to the transferee
Article 16 Any party shall not be responsible for the partial or total failure to perform this contract e to force majeure, but shall take all necessary remedial measures to rece the losses caused by force majeure if conditions permit. If force majeure occurs after a party's delay in performance, he shall not be exempted from liability
Article 17 in case of force majeure, the party shall inform the other party of the event in written form such as letter, telegram, telex, fax, etc. within 48 hours, and submit to the other party a report on the reasons why the contract cannot be performed or partially cannot be performed or needs to be delayed within 3 days after the event< Article 18 the transferee must pay the price of the mining right on time in accordance with the contract. If the transferee fails to pay the price of the mining right on time, it shall pay the late fee to the transferor at the rate of 3 ‰ of the delayed payment every day from the date of late payment. If the delayed payment exceeds six months, the transferor has the right to terminate the contract and recover the mining right. The transferee has no right to ask for the return of the paid price, and the transferor can ask the transferee to compensate for other losses caused by breach of contract< Article 19 If the transferee pays the price of the mining right as agreed in the contract, the transferor must provide the mineral resources available for mining on time as agreed in the contract. If the mining right can not be provided for the reason of the transferor for more than six months, the transferee has the right to terminate the contract, the transferor shall double the paid price, and the transferee may request the transferor to compensate for other losses caused by the breach of contract
the transferor specially reminds us that the risk of mining investment is high, and what the transferor transfers on behalf of the state is the right of mining, so the scale, shape, reserves and grade of the ore body may be different from the actual mining, and the transferor will not bear any responsibility for this
Article 20 if the transferee violates the provisions of Articles 9, 10, 11, 12, 13 and 14 of the contract, the transferor has the right to terminate the contract and investigate the relevant legal liabilities of the transferee< Article 21 the conclusion, validity, interpretation, performance and dispute settlement of this contract shall be governed by the laws of the people's Republic of China< Article 22 this contract shall come into force from the date when the transferor issues the mining license to the transferee
Article 23 this contract is made in quadruplicate, with the same legal effect. The transferor and the transferee shall hold two copies respectively< Article 24 this contract is signed in Changsha Bureau of land and resources, Hunan Province, the people's Republic of China on
Article 25 matters not covered in this contract can be agreed by both parties as an appendix to the contract, which has the same legal effect as this contract< br />

9. In western economics, LMC and SMC represent respectively, M represents margin, LMC represents long-term marginal cost, SMC represents short-term marginal cost, plus lac's long-term average cost, sac's short-term average cost, AC, to synthesize two graphs, which are used to illustrate several critical points, such as when the profit is the largest, when to start to lose, when to stop proction, etc. Western economics refers to the paradigm of political economy which is proced and popular in western countries. In a narrow sense, it refers to the paradigm of western bourgeois political economy. In a broad sense, it includes the paradigm of Marxist political economy. Western economics and Eastern economics are different economic paradigms. Western economics is mainly a paradigm concept, not just a regional concept. Since the reform and opening up, the popular Neo liberal economics in China also belongs to western economics.