Electronic currencies exchanger script. What is cryptocurrency and why is it needed

In May 2009, when the scrypt algorithm was published, it was difficult to imagine an "epidemic" of the appearance of cryptocurrencies on it. But by the end of the summer of 2013, several dozen cryptosystems (half of which were forks of Litecoin) started earning on scrypt, appearing almost every week. Not all scrypt currencies have survived to this day, but by the summer of 2018, Litecoin itself and a number of other members of the family are still relevant: Dogecoin, Syscoin, BitConnect, Bitmark, Novacoin, Fastcoin. The detailed list of cryptocurrencies based on the scrypt algorithm is several times larger and is presented in the article in alphabetical order. Moreover, while forming the list, we also tried to understand how the algorithm gained such popularity.

The history of the emergence and development of the idea of ​​a hash function

The authorship of the creation of scrypt (more often in Russian it is called "script", although the correct version is considered "es-crypt") belongs to Colin Percival. This cryptographic hash function (more precisely, the function of generating a secret key from a certain data array) was created, among other things, and as an alternative to the SHA256 hash function used in the Bitcoin network for proof of work (Proof-Of-Work, or PoW).

The essence of the concept of “proof of work done” was described back in 1993, in an article by Moni Naor and Cynthia Dwork, where the authors formulated the following idea: “To connect to a shared resource, a user needs to calculate a function that would be both quite complex and feasible ".

This condition can be described as an example of an activity from the real world, when a child needs to clean up his desk and put toys in order to receive a free treat. But this condition was somewhat more difficult to implement in the digital world, since there was another thing that was in effect: "The task execution (that is, the calculation of a function) should be much more difficult than checking the result." If the resource server, for example, would simply offer the user to multiply two large numbers, and then check the result, then the verification time would be comparable to the time of the work itself, which did not meet the conditions of the problem. The calculation of the function became more complicated.

The next requirement for the algorithm was the need to prevent parallelization of the function. It was important to make sure that the time taken to solve a number of problems was directly proportional to their number. In the above example, this meant that in order to receive a double treat, the child had to tidy up the desk the next day, since the "yesterday's order" was no longer suitable. In the digital world, an example of such a function is the calculation of the root of a quadratic equation modulo a prime number P.

In the future, the development of the PoW topic was carried out in several directions:

Even before the release of Bitcoin, Hal Finney's method was already supposed to use the RPoW principle, but there proof tokens were considered as an independent value. In the Bitcoin network, the PoW mechanism was already seen as a means of reaching a consensus on which version of the blockchain to accept as correct (reaching consensus). The author of Bitcoin added a mechanism of varying complexity to the topic of the Hashcash project, and SHA-256 was chosen as a computed function. As a result, the owners of GPU and ASIC equipment took over the mining of this cryptocurrency very quickly. Therefore, it is not surprising that at the beginning of autumn 2011 the Tenebrix system appeared - the first cryptocurrency based on the scrypt algorithm.

The principle of the algorithm and implementation options

A script is not really a cryptographic function. Rather, it is KDF - a key formation function. The task of KDF is to make it difficult to generate a key (for example, by brute force passwords), but not so much that it cannot be used in applied tasks.

In the second hashing layer in the scrypt scheme, the input block is expanded to an array of N blocks (a mechanism for sequentially applying a pseudo-random BlockMix function). The larger the value of N, the more memory is needed for the algorithm to work. For Tenebrix, the scrypt parameters were chosen so that the entire memory size would fit in 128Kb (this was determined by the processor's L2 cache size). In this situation, CPU miners turned on again in mining on scrypt, until a few months later an optimized GPU miner came out, giving a tenfold increase in mining efficiency in those conditions. The efficiency could have been different, but during this period, one currency after another began to be actively launched on the script algorithm, and the computing power was "scattered" between them.

However, even before the scrypt-ASIC was announced, the developers took care of improving the algorithm and, having worked with the dynamic amount of memory, implemented improvements in two versions:

• Scrypt-N. Among the three main parameters of the Script algorithm (N = 1024, r = 1, p = 1, where N increases the memory size, and r, in addition, adds the number of calls to the mixing function) in the Scrypt-N implementation, the number N periodically doubles twice, which also requires an increase in the amount of memory.
• Scrypt-jane. In this version, the number N also increases, but this happens according to a formula that is nonlinearly determined by the current time. In addition, a number of mixing and hash functions are added.

The evolution of the development of the idea did not stop there either. A fundamentally different function of memory-bound PoW was implemented in BitShares Momentum.

Mining on scrypt for each individual user - that is, the process of finding a hash suitable for forming a new block - depends on the ratio of the number of hashes per second, issued by the user's equipment, to the network-wide number of computed hashes per second. For finding a new block during mining, the user receives his share of the mined coins.

The scrypt algorithm essentially uses SHA256 as a subroutine, which results in a lot of math and fast access and large amounts of memory. This determines the higher production cost of ASICs for scrypt than for SHA256. However, due to the fact that modern GPU devices are endowed with large memory, some users still continue to mine coins of the scrypt family on video cards, collecting them in mining farms and connecting to pools.

The parameters of the scrypt algorithm allow network participants who are not involved in mining to run the client in multitasking mode without affecting the performance of the system as a whole.

List of cryptocurrencies on Scrypt

The list of cryptocurrencies working on scrypt cannot be constantly up-to-date and exhaustive, since new cryptosystems are regularly launched, but below is the most complete list of them.

If we add to this the cryptosystems built on the variants of the Scrypt-N and Scrypt-jane algorithms, then the list will expand further. Scrypt-N representatives are TenfiveCoin, SpeedCoin, SpainCoin, rotoCoin, Panda. ZcCoin, Yacoin, Velocitycoin, ThorCoin and other crypto networks operate on Scrypt-jane.

Cryptocurrency is a digital currency, sometimes it is also called electronic gold. For several years now, such a currency has existed on the Internet, and a large number of people have no idea what it is. Let's try to figure out what cryptocurrency is, what it is for, can such a currency bring income and how does it work at all?

What is cryptocurrency?

This term is incomprehensible to all those who have not had a chance to deal with digital currency. Cryptocurrency is a unique electronic means of payment; only supply and demand affect its rate. None state the system in the world, even the Central Bank cannot regulate it. Network users, as well as the owners of the cryptocurrency, are the only controllers and observers of it.
A large number of people believe that cryptocurrency is money for the near future. This opinion is supported by the fact that in Europe and the United States, some large stores are already able to settle in cryptocurrency. Of course, there are skeptics who consider digital currency to be fraudulent schemes or pyramids like MMM. Most of the distrust in cryptocurrency is due to the lack of clear and understandable information on this topic among people. But some are confident that electronic money will be able to squeeze paper means of payment from the market and become an engine of progress.

Distinctive properties of cryptocurrency

The main feature of this currency is decentralization... The cryptocurrency is on the Internet and decentralized has no control. Another big plus of electronic currency is its anonymity, as well as confidentiality transactions performed. The cryptocurrency wallet is not tied to personal data and is a set of symbols. The transfer of cryptocurrency between the owners of such wallets is much faster (even if the transfer is international) than a similar bank transfer. At the same time, there is no commission at all. Its course is not influenced by either political instability or the activities of financial institutions. Another specificity of the cryptocurrency is its instability, which can change every minute. Its advantages can be seen as well as its disadvantages. For example, anonymity is good for speculating on the Internet with a lot of e-currency. The disadvantage of such a translation system is its vulnerability to viruses wandering on the Internet, as well as to malfunctions of physical storage media. Spread electronic coins can affect the rate of the national currency, for example, cause it to fall, negatively affect the work of financial institutions and banks, shake the economy of a particular state or the world economy as a whole.

What cryptocurrencies exist

The list of cryptocurrencies is constantly growing. Some appear, others disappear, there are those that have existed for a very long time. The most popular cryptocurrencies in the world are: Bitcoin, BTC (bitcoin); Ethereum, Ether (popularly); Litecoin, LTC (litecoin); Dogecoin, DOGE (dogecoin); Peercoin, PPC (peercoin); Dashcoin, DASH (dashcoin). In total, since 2008, approximately 600 names of cryptocurrencies have been recorded, both existing now and sunk into the summer.

Most popular cryptocurrencies

Of course, the most popular cryptocurrency is bitcoin, and anyone who has been involved in the electronic money market will confirm this to you. Bitcoin was the first cryptocurrency to appear in the world and today remains the leader among all the others. All cryptocurrency exchanges work with bitcoin. The second most popular cryptocurrency is Litecoin. It was created by a former Google employee in 2011. The third currency on this list, Primecoin, is one of many copies of bitcoin, which appeared in mid-2013.

Buying cryptocurrency

The easiest way to get hold of cryptocurrency is to buy it with real money. There are many on the internet. With their help, you can exchange your real money for electronic money. Having made such a purchase, the cryptocurrency from the exchange is transferred to your e-money wallet.

Getting cryptocurrency without investment

This method is called mining and this method only seems to be costless. In reality, in order to receive electronic money in this way, you will need computer equipment with good computing power. After installing a special program, you can start the mining process itself. The meaning of this method lies in the need to find a number, in the search for which the solutions of algorithms help. In cryptocurrency parlance, this process is called "solve the block". When solving each block, a certain number of coins are released. If one user is doing this, then this is solo mining. But recently, this method has not been effective, because. requires a huge amount of time. There is a pool - mining in which miners combine the computing power of their computers using the Internet. With this method, the block is solved much faster, but the received electronic coins are divided among everyone who participated in the process.

Earning cryptocurrency on rate fluctuations

When electronic currency appeared among the masses and gained popularity, it became virtually impossible to make a profit through mining. The constantly changing rate of electronic currency is more profitable for earning and more and more users use this method. The constant emergence of new cryptocurrencies and the extinction of old ones cause huge leaps in rates. So, for example, bitcoin in the near 2013 increased in price from $ 90 to $ 1000. This makes it possible to make money quickly, having made an exchange of cryptocurrencies on time, but also with a high degree of probability to lose your investments.

Non-standard types of earnings

For the sole purpose of receiving dividends. But this type of earnings should be approached with caution, because. there are companies that imitate mining and are unable to generate income. There are also various sites that distribute news, registration, attracting referrals and other not difficult operations. For the most part, their job is to attract the masses to accumulate cryptocurrency.

The business of exchanging bitcoins, altcoins, and in general cryptocurrencies is developing rapidly, not just from year to year, but even every quarter. Investors, traders, they all sit at their monitors with great expectations, watching the charts of the exchange rates. But how do you start a cryptocurrency exchange yourself? Is it worth considering, or is it better to invest and buy a cryptocurrency exchanger / exchange script? What you need to pay attention to when buying and downloading, read further in our article.

What to look at?

Some solutions and scripts seem useful and very cool, but they are deceiving. Just a sale packaging. Finding out how it actually works is possible only by installing it on your own server, by trial and error. Customization can be a living hell, the functionality is not flexible, and the platform does not scale at all. In this case, only disappointment awaits you in the future. To prevent this from happening, we will help you.

Architecture

Perhaps the basis of all web applications is their architecture. The architecture is developed for several types of projects with different loads. In cryptocurrency exchanges, these are small, medium and large (enterprise) projects. However, this also applies to. The characteristic feature of the small project is the all-in-one architecture. One of the most popular in 2000. It can cost less, however, and the bandwidth, the load is also not so hot, but minimal.

Free download the script of the BitExchanger currency exchanger v2.0. With this BitExchanger script you can create your own e-currency exchange website.

The script supports exchanges between: PayPal, Skrill, WebMoney, Payeer, Perfect Money, AdvCash, OKPay, Entromoney, SolidTrust Pay, Neteller, UQUID, BTC-e, Yandex Money, QIWI, Payza, Bitcoin, Litecoin, Dogecoin, Dash, Peercoin, Ethereum, TheBillioncoin, Bank Transfer, Western Union, Moneygram.
In the key field, write any text, everything must be in English, otherwise it will not work. The site is empty, you yourself choose which currency to work with
The main features of the script:

1. Bootstrap 3 responsive design
2. JQuery interface for sharing
3. Jquery calculator to calculate the amount of fast
4. Multilanguage system
5. Support for RTL languages
6. Automatically get an international rate on Google Currency API
7. Automatically get Bitcoin price from BTC-e.com
8. Affiliate program
9. Reviews
10. Limiting information
11. Gateways Surcharge
12. Track system for heat exchangers
13. Actions of the administrator of the notification of new exchange requests Status
14. Operator in the header
15.3 steps to verify your account
16. SSQL security
17. Good user interface
18. Email notifications for each exchange status
19. Option: The administrator may require the user to have an exchange account
20. Wallet system
21. System of deposits
22. Send money from the wallet to the user on the site
23. Transactions System
24. Profit System
25. Withdrawal
26. Referral system

3 steps of account verification:

1. Confirmation by email
2. Document verification (which require approval by the document administrator) Mobile verification number (Using the Nexmo.com API)
3.Can be enabled / disabled for each check and if disable all, the user will be activated after registration

Operator capabilities:

1. Can handle exchanges
2. Can give referrals profit
3. Can drive feedback
4. Documents can be approved
5. Can manage withdrawals and more.

Administrator functions:

1. Full dashboard administrator
2. Can handle exchanges
3. Can manage users
4. Can manage withdrawal
5. Can drive reviews
6. Can control Gateways
7. Can manage exchange rates and more.

Gateways control:

1. Management currency (up to 160 world currencies - USD, RUB, EUR, GBP, etc.)
2. The minimum amount for exchange
3. Maximum amount for exchange reserve
4. Option Customs fee
5. Additional fee option and more.

Requirements for the script:

Apache 2.2 Server
PHP 5.4+
MySQL Database Server
Apache mod_rewrite ON
PHP MySQLi extension
PHP allow_url_fopen ON
PHP curl extension

Quickly buy cryptocurrency at the most favorable rate and with the lowest commission possible at .

Cryptocurrency

With the growing popularity of cryptocurrency and technology, many are wondering - what is cryptocurrency, what are its features and how to make money on cryptocurrency? The forerunner of the entire cryptocurrency industry is Bitcoin / Bitcoin and abbreviated BTC , it was released back in 2009. Since the birth of bitcoin, its rate has grown thousands of times, and at the end of 2017, it reached a peak value of more than 20 thousand USD for 1 BTC. This digital gold is widely used as a means of payment, and, of course, earning bitcoins is possible in several ways, which I will write about later.

What is cryptocurrency and how does it work?

What is cryptocurrency - a digital coin based on cryptographic algorithms and circulating on decentralized platforms built using blockchain technology. This term was first used in Forbes magazine in 2011 in an article on Bitcoin.
Unlike classic electronic money, digital currencies have no analogues in the physical world and are a set of encrypted data stored on the blockchain network. The emission of new coins occurs according to a given algorithm and usually has a limit on the number of coins issued, for example, only 21 million bitcoins will be issued.

To work with cryptocurrencies, you need special software - a wallet program (or,). This program allows the user to work with the blockchain and create transactions or receive transfers to their address. To work with a bitcoin wallet, you need two keys:

• a public key is an address where any owner can transfer funds;
• private key - a secret alphanumeric code, with its help the user signs his transfers.

The signed transaction is broadcast to the network and after several confirmations, the funds are credited to the specified address.

Basic principles of working with cryptocurrencies:

• irreversibility - the completed transaction cannot be canceled;
• anonymity - the blockchain does not contain information about the owners of funds;
• decentralization - network performance is ensured by a huge number of nodes controlled by different users;
• security - the use of cryptographic methods makes the cryptocurrency resistant to hacking.

Popular types of cryptocurrencies

All cryptocurrencies that appeared after bitcoin are usually called - altcoins... In total, there are several thousand digital coins, but not all have gained universal popularity, we will describe the top coins below.

Top 7 cryptocurrencies by market capitalization:

There are many other promising cryptocurrencies, but the success of the project will depend on the implementation of the developers' plans.

Learn more about Bitcoin

Bitcoin is the most popular cryptocurrency and many options for earning money are somehow connected with it. Therefore, it is recommended to consider its features in more detail. Its name comes from the confluence of two words - coin and bit (unit of information).

As a cryptocurrency, bitcoin has a number of functions of traditional fiat funds:

• means for making settlements;
• means of accumulation and savings;
• a medium of exchange and investment.

New coins are issued according to a given algorithm, and the total emission is limited. Thanks to this, bitcoin is not subject to inflationary processes, and the use of cryptographic protection methods makes it impossible to issue counterfeits.

The bitcoin rate is formed on cryptocurrency exchanges and depends on supply and demand.

Additional advantages of bitcoin over fiat currencies:

• open source code allows any user to start mining new coins;
• anonymity of transactions - information about the owner of the wallet is not disseminated in the blockchain network;
• the absence of a single controlling and emission center protects the cryptocurrency from unfair manipulation by interested parties.

You can buy bitcoin on exchanges, exchangers or directly from the owners. Many online stores began to accept cryptocurrency as payment, and there is also a network of ATMs where you can exchange digital for fiat money.

How can you make money on cryptocurrency? The main ways to earn Bitcoin

In the world, the popularity of cryptocurrencies and blockchain technology is growing, which provides many ways to earn bitcoins or other cryptocurrencies. There are many such methods, they can be divided into those requiring financial investments for the purchase of equipment or the purchase of digital coins and into ways of how to earn cryptocurrency without investments. The first option includes:

1. Cryptocurrency trading... Exchange bitcoin or other coins among themselves or for real money, at a favorable rate. The principle of earning is simple - when the rate decreases, buy, and when the rate rises, sell. You can trade on. Also, the exchange of digital coins can be carried out on online exchange services.
2. Invest funds in cryptocurrency in Trust Management... You can independently engage in stock trading, thanks to the world's first social broker eToro(). Multi robot, sites provide an opportunity to earn from 15% to 50% per month!
3. Bitcoin mining... Solving complex cryptographic tasks using special equipment - mining farm. Finding a certain result allows you to confirm blocks of transactions in the network, for which a reward in the form of new coins is charged. This method requires the cost of purchasing equipment. Users who want to mine without investment and have a powerful PC can try to mine altcoins by pooling with other users using the service Minergate.
4. Cloud mining... This service is provided by special services that make it possible to rent a certain amount of computing power and make a profit.
5. Highly profitable, you can familiarize yourself with the current list.

The second method includes bitcoin faucets. There is a possibility of earning bitcoin without investments for visiting special sites, where a certain amount of coins is charged for entering captcha and viewing ads. The reward is available once in a certain period of time, and one of the most popular taps is considered freebitcoin(). Such sites maintain a referral reward system for attracting new users. There are even bitcoin games, for example Сhopcoin ().

Lately, a lot of new cryptocurrencies have appeared. To develop their projects, they use the program - the initial placement of coins to attract investment.

There are several ways to make money on such programs:

• purchase coins in the early stages of placement with an additional bonus and sell it after the rate rises;
• - free distribution of a certain amount of cryptocurrency to attract attention and popularize new coins;
• Bounty is a program for promoting new coins in social networks and on popular portals, developers pay active users or their subscribers who contribute to the popularization of their currency.

Conclusion

Cryptocurrency is the digital money of the future. Having figured out their types, features and learning how to use them, you can choose an acceptable way to earn crypto for yourself. This type of income can bring additional funds or become the main source of income.

mr. Freeman about Cryptocurrency