Cat game Ethereum
There is an essential difference between Ethereum and bitcoin. What is the difference? Bitcoin defines a set of currency system, while Ethereum focuses on building a main chain (which can be understood as a road) to allow a large number of blockchain applications to run on this road
from this point of view, Ethereum's application scenarios are more extensive, which is why we say that Ethereum marks a simple monetary system in the era of blockchain
1.0, and a transformation to other instries and application scenarios in the era of blockchain 2.0
however, there is no perfect thing in the world. Although Ethereum has expanded the application scope of blockchain in all walks of life and improved the speed of transaction processing, it also has some disputes and doubts
first, the solution to the lack of scalability of Ethereum: slicing technology and lightning network
the bottom design of Ethereum, the biggest problem is that Ethereum has only one chain and no side chain, which means that all programs have to run on this chain equally, consuming resources and causing system congestion. Just like last year's very popular Ethereum game "encryption cat", when this game was very popular, it once caused Ethereum network paralysis
to improve the processing capacity, Ethereum proposes two ways: shard and lightning network. Let's introce these two technologies respectively
(1) fragmentation technology
vitalik buterin, founder of Ethereum, believes that the reason why mainstream blockchain networks such as bitcoin process transactions very slowly is that every miner has to process every transaction in the whole network, which is actually very inefficient. The idea of fragmentation technology is: a transaction does not need to be processed by all nodes in the whole network, as long as some nodes (miners) in the network are allowed to process it. Therefore, Ethereum network is divided into many pieces. At the same time, each piece can handle different transactions. In this way, the network performance will be greatly improved
however, the slicing technology is also controversial. As we all know, the important idea of blockchain technology is decentralization. Only when the whole network witnesses (processes) the same transaction can it have the highest authority. The Ethereum slicing technology is similar to the group witness, not all nodes witness together. In this way, it will lose the absolute "decentralization" attribute, and can only achieve the purpose of high performance by sacrificing certain characteristics of decentralization
(2) lightning network
lightning network uses the way of transaction under the chain. What does that mean? It means: when the participants of lightning network transfer money to each other, they do not need to confirm the transaction through the main chain of Ethereum, but create a payment channel between the participants and complete it under the chain
however, lightning network is not separated from the main chain. Before establishing a payment channel, you need to use the assets on the main chain as collateral to generate a balance proof, which indicates that you can transfer the corresponding balance. In the case that both parties of the transaction hold the balance certificate, both parties can make unlimited number of transfers under the chain through the payment channel
only when the off chain transaction is completed and the assets need to be transferred back to the chain, the balance change information of the main chain account will be registered on the Ethereum main chain, and no matter how many transactions occur ring this period, there will be no record on the main chain
another real benefit of lightning network is that it can save the cost of miners for you. At present, when we trade on the main chain of Ethereum, we need to consume gas and pay for miners. Once we move the transaction to the lower chain, we can save this part of the cost
Of course, lightning network is not perfect. When using the lightning network, the assets on the main chain should be used as collateral; And this part of assets as collateral can not be used before the user completes the transaction under the chain. This also determines that lightning trading is only suitable for small transactionsthe above is the problem of insufficient scalability of Ethereum, as well as the two main solutions: fragmentation technology and lightning network
Second, there are loopholes in Ethereum's smart contract and the infamous Dao event
Ethereum's smart contract is very powerful, but there are loopholes in any code. The biggest controversy of Ethereum's smart contract lies in the so-called loopholes, that is, security issues. According to relevant research, 34200 (about 3%) of the nearly 1 million smart contracts based on Ethereum contain security vulnerabilities, which will allow hackers to steal eth, freeze assets or delete contracts, such as the infamous Dao incident
(1) what does Dao meanbefore introcing the Dao event, let's first introce what Dao is. Dao is the abbreviation of decentralized
autonomous organization, which can be understood as decentralized autonomous organization. From the perspective of Ethereum, Dao is a kind of contract or a combination of contracts on the blockchain, which is used to replace the government's review and complex intermediate proceres, so as to achieve an efficient and decentralized trust system. Therefore, Dao is not a specific organization, that is to say, there can be many Dao, all kinds of Dao
(2) the infamous Dao event
however, when we talk about Dao now, we basically refer to the Dao event, that is, the infamous hacker attack event we just mentioned. As we know, the English word "the" refers to "the Dao event". The Dao event
refers to "the Dao event", because we just said that Dao is not a specific organization, there can be many Dao, all kinds of Dao
in 2016, slock.it, a German company focusing on "smart locks", launched the Dao project on Ethereum in order to realize decentralized physical exchange (such as apartments and ships). Since April 30, 2016, the financing window has been open for 28 days
unexpectedly, this Dao project is very popular. It raised more than US $100 million in just half a month. By the end of the whole financing period, it raised a total of US $150 million. Therefore, it has become the largest crowdfunding project in history. However, it didn't last long. In June, hackers took advantage of the loopholes in the smart contract to successfully transfer more than 3.6 million Ethernet coins and put them into a Dao sub organization, which has the same structure as the Dao. At that time, the price of Ethernet currency fell directly from more than $20 to less than $13
this event shows that there are loopholes in smart contracts, and once the loopholes are exploited by hackers, the consequences will be very serious. This is why many people criticize Ethereum and say that its smart contract is not smart
to solve this problem, many foreign companies begin to provide code audit services in order to solve the vulnerability problem of smart contract. From a technical point of view, some teams are currently testing smart contracts. Most of these teams are led by professors from Harvard, Stanford and Yale, and some of them have obtained investment from leading institutions
in addition to the problems of insufficient expansibility and loopholes in smart contracts, the controversy over Ethereum lies in the POS consensus mechanism it pursues, that is, the proof of equity mechanism. Under the proof of equity mechanism, if anyone holds more money and holds it for a longer time, he will get more "rights" (interests) and have the opportunity to get bookkeeping power, Bookkeeping can also be rewarded. In this way, it is easy to create the oligarchic advantage of "the stronger the stronger"
Another problem is the chaos of ICO. ICO is a common way to raise funds for blockchain projects, which we can understand as pre-sale. The outbreak of ICO projects on Ethereum has caused illegal activities such as fund allocation and money fraud under the banner of ICO, which has caused security risks to social and financial stability[picture]
EOS: EOS can be understood as enterprise operation system, which is a blockchain operating system designed for commercial distributed applications. EOS is a new blockchain architecture introced by EOS software, which aims to realize the performance expansion of distributed applications. Note that it is not a currency like bitcoin and Ethereum, but a token based on the EOS software project, known as blockchain 3.0
The main features of 
EOS are as follows:
1. EOS is a bit similar to Microsoft's windows platform. By creating a developer friendly underlying platform of blockchain, it supports multiple applications to run at the same time and provides the underlying template for the development of DAPP
EOS solves the problems of delay and data throughput by means of parallel chain and dpos. EOS can process thousands of data per second, while bitcoin has about 7 transactions per second, and Ethereum has 30-40 transactions per second There is no service charge for EOS, and the general audience is more extensive. The network and computing resources needed to develop DAPP on EOS are allocated according to the proportion of EOS owned by developers. When you have EOS, it is equivalent to having computer resources. With the development of DAPP, you can lease your EOS to others. From this point alone, EOS has a wide range of value. To put it simply, if you have an EOS, it is equivalent to having a set of rent to collect rent for others, or having a piece of land to rent for others to build a house. digital currency exchange "currency exchange"
development prospects
through a more in-depth understanding of EOS, EOS is quite valuable for investment. First of all, as the first to launch smart contracts, ETH runs smart contracts on eth, which is not free and depends on your gas. If gas runs out, the contract will stop. According to people who have used eth trading platform, it runs slowly and is very expensive, However, there is no such problem in EOS. The operation contract on EOS depends on the number of EOS you have. The more EOS you have, the more you can rent. With the continuous development, the more expensive the price will be; Secondly, it's very simple to develop DAPP on EOS, and you don't need to write many moles, because EOS itself builds the bottom mole for developers, which provides a platform and greatly reces the threshold of development; Thirdly, as an ordinary investor, owning EOS is equivalent to owning real estate, which can be used to rent and earn money. With the development of DAPP, the number of users increases, and the price increases irresistibly
ether clown, cryptoclown is my full name. Make a real blockchain pet development game
as a pet that people love, what other characteristics do I have besides "beauty"
every day, I will act coquetry with my host
when I am full, I will work to earn money, eat less and earn more
for me, it doesn't cost the owner money, but also makes money (male clown)
I have a baby who is not out of shape. When the baby grows up, it can make money. When the baby grows up, it can make money again. There are endless generations (female clowns)
I carry 54 gene codes (well, several pairs more than 23 pairs of the host), engraved with genes given by my grandparents and parents, and my own random genes, which determine my appearance: background color, clothing pattern, skin pattern. Occasionally, there may be gene mutation to obtain some extremely rare appearance. Anyway, I'm unique
the main feature of ether clown is digital collection, which is my most typical and important feature. I am a non-standard digital currency (like ether currency, each unit is equivalent, we call it standard digital currency). Each of our brothers and sisters represents the value of a currency, and with the careful care of the host, my value will be higher and higher. If the host has a new lover, you can sell me at any time to make money. Oh, I swear I will not count your money, Really
I, based on the blockchain, can never be changed: all my actions above will be recorded on Ethereum, and the host can clearly query all the above data information of me and my partners through the verification of the third-party platform. The gentleman is frank, that's us. Our smart contract part of the code, are open source Oh, owners can view any
next, let me briefly introce the play of cryptoclones
cryptoclones is a digital blockchain game with collection value based on Ethereum blockchain. Using ether money to adopt clowns can be resold, and they can also be used to breed a new generation of clowns with strange shapes. They can also be cultivated to work and earn money, which makes the digital collection of clowns more sustainable and playable
there are two kinds of clowns, one is the official output, the other is the cultivation output between clowns. Official clowns are proced every 15 minutes, and the total number is only 50000. At certain times, the official will also release some strange clowns with special shapes. The price of the original clown is the average of the prices of the last five clowns in the market
two clowns of different genders can reproce in the breeding center of the market. In each breeding pair, one clown who plays the role of father can receive the breeding fee paid by the other party (maternal Master). After breeding, there is a certain recovery period, which is related to the clown's genes. The clown in the role of mother will have a period of pregnancy, and she will not be able to breed with other clowns until she gives birth to her baby. There is no limit to the number of breeding times of each etheric clown, but the recovery period and pregnancy period will increase with the number of breeding times
the ether clown can be used to trade directly
sell: users can choose clowns to be auctioned in the market, and they can sell their own clowns. When selling, users need to set the highest starting price, the lowest acceptance price and the auction time. The Dutch auction is adopted in the auction. During the auction time, the highest price set by the seller is graally transferred to the lowest price. If the owner is not willing to sell at a low price, a longer auction time can be set or the clown can be sold off the shelves
buy: the buyer selects the clown on sale in the market and pays ether to buy the clown he likes. When the buyer purchases, the transaction will be concluded at the auction price at the current time point. If you have a favorite clown, but feel that the price is not suitable for the time being, and want to pay more attention, you can collect the clown after you like it. Later, we can understand the dynamic of the clown through "my attention"< There are four kinds of clown attribute values: growth value, strength value, agility value and wisdom value. Generation 0 clowns get the value of each attribute randomly, and the non generation 0 clowns are mainly inherited
attribute values can be changed by eating food
after the clown's growth value reaches the requirement (100 points), he can go to the factory to earn money (ETH). Different kinds of factories need different clowns. Dream college needs the wisdom of every working clown. Clowns with more than 800 points of wisdom go to Dream Academy of Sciences to work, and their income can get bonus. If a clown with less than 300 wisdom goes to work, his income will be reced to
a part-time job will consume physical strength. The total physical strength is 120 points. It consumes 1 point every 12 minutes and can work up to 24 hours. During the period of not working, physical strength can be recovered, a little every 8 minutes
when the time reaches 0 o'clock or the clown's physical exertion is completed, the clown's work income will be settled according to the actual working hours at 0 o'clock every day. When every 12 minutes is a work, less than 12 minutes will not be counted
owners can buy spinach, beef, carrots, walnuts and other food through the mall to feed clown pets
the price of food is related to the selling price of original clowns on the platform the day before. So the owners can hoard some food when the price of food is low
feeding spinach is helpful to growth value, beef corresponds to clown pet's strength value, carrot corresponds to agility, walnut corresponds to wisdom
the clown can only eat one food a day. We suggest that spinach should be fed in the early stage to meet the working conditions as soon as possible, and then according to the natural properties of clown in the later stage. When working, choose the type of factory with the highest attributes to work
our goal is:
to make real games, let players get a more comfortable experience, and combine with blockchain technology to ensure the interests of players
with the well-known proct form of games, we will spare no effort to promote blockchain technology and bring human beings into the era of full intelligence!
on cryptokitties, you can buy virtual cats. By 17:00 Beijing time on December 6, 2017, the cheapest kitten had reached 0.037eth. Equivalent to 110 yuan per piece
then the kittens have some opinions about the generation. For example, Gen 12 indicates that it is the 12th generation, while Gen 20 indicates that it is the 20th generation. Generally speaking, the smaller the algebra, the more valuable it is. And you can make your kittens slap each other. For example, a Gen 1 kitten and a Gen 1 kitten will give birth to a Gen 2 kitten
you can sell your kittens and their offspring for money
but what if you don't have two kittens? If you only buy one kitten, you can use your kitten to have fun with other people's high-quality kittens. The fee also depends on the kittens (to be honest, this mechanism is very evil, similar to... Borrowing chickens to have children?) The quality of the proct. If your kitten is of high quality, you can also use your kitten to mate other people's kittens, and then you get Ethereum income
but kittens also have special fertility rates
every time a kitten gives birth to one generation, it will have a certain cooling time, and it can't regenerate kittens within the cooling time,
the cooling time is divided into several grades
fast: 1 minute
swift: 2 – 5 minutes
snappy: 10 – 30 minutes
brisk: 1 – 2 minutes
plodding: 4 – 8 minutes
slow: 16 – 24 minutes
sluggi Sh (lazy kitten): 2 – 4 days
catatonic (nervous kitten): 1 week
so the price of your cat also depends on its birth time
and generally speaking, the larger the algebra is, the higher the gen value is, and the slower their growth rate is
but I want to make complaints about it because CryptoKitties is too hot! Ethereum network has a little bit of a crash, the official recommended that every time you buy a cat, the minimum handling charge is 21000. 400000 fuel = 0.01eth. However, it is irritating that I raised the procere to 1.6 million fuel, which is 0.04, and Ethereum still failed. 0.04 Ethereum. That's more than 120 yuan. It's too dark.
" in the fire, between Rembrandt and a cat, I chose to save the cat. " Even 50 years after the death of the artist Giacometti, his words still resonate with countless cat slaves. For many people, loving a cat is far more fun than loving a person
"white paper on China's pet instry in 2017" (hereinafter referred to as "white paper") shows that as of this year, the number of pet cats and dogs in China has reached 87.46 million, and the market scale has reached 134 billion yuan, which will increase by 40% in the next three years. This means that almost one in 10 people has a cat or a dog
compared with dog's stickiness, cat's independence is more and more favored by urban new middle class. In the past two years, "sucking cats" and "sucking cats" have spread like a virus to the whole society. Nearly 100000 netizens mourned the death of the online red cat loulou on Weibo, which is enough to imagine the impact of cats on people
Why are more and more people willing to be slaves of cats? Are those who are keen on "sucking cats" short of cats or lovewho are keeping cats
since 2016, the group of "empty nest youth" has been widely concerned. The data show that this group is mainly distributed in the first tier cities such as Beijing, Shanghai, Guangzhou and Shenzhen, and the age groups are all post-80s and post-90s. They are usually far away from their hometown, working alone, unmarried, single and living alone. Coincidentally, these characteristics are more than 95% consistent with the pet owners mentioned in the China pet consumer behavior report
Jiang Yu is a typical "empty nest youth". Since 2015, she has bought a cat every year, and the existence of three cats has enriched her life“ When I first came to Shanghai, I lived in a shared house. There were six rooms in a house less than 100 square meters. " "The number of people sharing doesn't mean it's busy. Because the working hours are not fixed, we can't see roommates at ordinary times, let alone sit together and chat," she said
"I've lived there for about five months. I don't know what my roommate does. Everyone goes back to their rooms after work and won't open the door if they have nothing to do." Jiang Yu said. After her internship, she moved closer to the company and started living alone. As the work began, she had more personal time. When a person stays at home, Jiang Yu is often "too empty to feel his own existence"“ To tell you the truth, Shanghai is a place with little humanity, and it's hard to make friends. If there is no intersection in work, there will be no communication between colleagues. "
so when Jiang Yu happened to see a kitten on Douban, she resolutely took it home. She said: "I have a lot of negative emotions at work. I feel that the cat has its own healing function. I feel comfortable when I see it after work." After having a cat, Jiang Yu stayed at home almost every weekend, watching movies and reading books with her cat in her arms. She found it more interesting to chat with someone she didn't know
like Jiang Yu, the vast majority of "empty nesters" raise cats because they feel confused and lonely when they first come to society and want to find emotional sustenance. With the development of economy, on the one hand, their disposable income increases enough to bear the cost of living alone. On the other hand, the accelerated pace of life makes them tired of devoting energy to maintain interpersonal relationship. At this time, the independent, calm, soft and mysterious cat gives emotional comfort to the urban people who are afraid of trouble but eager to accompany, greatly meeting their emotional needs
"I was on a business trip two days ago, and I didn't have a cat around me. I felt that something was wrong." Liang Le said. Liang Le, who just graated last year, raised two cats in Beijing. As a media person who often deals with people, she thinks that "cat raising" is not equal to "social phobia"“ I have to go out for interviews every day. How can I be socially afraid? At the beginning, I really wanted to have a partner, but later, it was more because people like cats in many details of life. I like cats from the bottom of my heart. "
in Liang Le's view, the economic cost of raising a cat is getting lower and lower. In addition, people themselves have no resistance to lovely creatures, so raising a cat has become a matter of course. At the same time, compared with a lot of time and energy required to raise a dog, the time cost of raising a cat is also very cost-effective. She believes that there will be more cat owners in the future
"but now many people don't really like cats. They always impose their own aesthetic on cats to satisfy their vanity." Liang Le said. She refers to some pet owners who often take their cats to pet shops for bath and beauty. With the development of Internet social platform, the circle of friends and microblog "Sun cat" have become a kind of show off and talk. Many cat owners dress, beautify and even dye their cats in order to make them look better. The trend of purebred cats is becoming more and more popular
however, Liang Le also found that even though she firmly believes that cats should be loved by themselves, there are more and more instries serving cats
In 2015, Japanese economists invented a new word: "cat economics"“ "Cat economics" means that no matter how difficult the economy is, the public's enthusiasm for cats and related procts will always be high. As long as businesses use cats, they can attract attention and benefit from themthe survey shows that more than 80% of Chinese cat owners regard cats as children and family members. This means that cats are playing an increasingly important role in people's lives. In this context, in addition to the traditional cat food, cat supplies, cat coffee shop, cat foster care, cat funeral services, cloud cat app and so on have become emerging hot instries
aiming at this trend, at the beginning of this year, Bob and his friends opened a cat coffee shop in Shenzhen. He said: "Beijing, Shanghai, Guangzhou and Shenzhen are all immigrant cities. Many people like cats, but they don't have the conditions to keep them. For example, landlords don't allow them, roommates don't like them, and so on. So if this instry does well, there will be a lot of room for development."
to this end, Bobby and his friends went back and forth to more than a dozen cat cafes for investigation and research, and worked out the operation plan while selecting the site. As the partner originally runs a cat house, has experience in cat care and has a supply channel for cats, Bob is full of expectations for the future of this store. As one of the biggest cat caf é s in Shenzhen, Bobby's store has more than 30 cats, mainly engaged in catering and helping the cat house to sell cats and their peripheral procts. Driven by the trend of raising cats, in the first half of this year, his net profit of cat cafe was more than 20000 yuan per month
in fact, like Bob, there are not many people who want to gain a share in the cat instry market through cat cafe. However, since the birth of cat caf é, in addition to the issue of profit, the health of cat caf é and the health of cat are controversial. Even so, Bob is still optimistic about the instry: "everything has a development process, and problems represent a new stage." At present, there are nearly a thousand cat cafes in China, and they are still increasing
compared with the offline "sucking cat", the development of "cloud cat" is very vigorous. The early "cat raising in the cloud" originated from the fact that some bloggers shared their cat's daily life on social platforms such as wechat and microblog, so as to attract the onlookers of cat slaves@ Recall special vest, @ melon skin ID sauce and other micro blog big V is to use their pets to attract tens of millions of fans. Among them, @ recollect special vest has become a leader in marketing by advertising and writing soft articles with a Scottish Fold eared cat and a samoyer dog. The number of tweets about these two pets' lucky draw is up to 500000. The price of a microblog advertisement in xiaomajia is about 20000 yuan, with an annual income of more than 8 million yuan
with the development of Internet technology, all kinds of cat related apps are also online Cat backyard is a cat nurturing game. Users can buy toys and build houses for cats in the app. As of July this year, the number of downloads of "cat's backyard" has exceeded 19 million. Now, the game not only promotes the VR version of "cat backyard VR" with the times, but also adapts it into a live action movie, which makes the majority of "cloud sucking cat patients" addicted
in November this year, cryptokitties, a virtual cat game, logged into the Ethereum blockchain. Attracted by cute cats and virtual digital coins, cryptokitties has become the most popular project on the Ethereum blockchain since it was launched. Players can buy, sell and breed different kinds of electronic pet kittens on it. This project once accounted for 15% of the traffic of Ethereum. According to official data, the total sales of cryptokitties has reached $7.9 million, with a total of more than 70000 virtual cats sold, and the most expensive one has sold to 260 million yuan. It can be seen that the cold sounding blockchain, once added with the element of cat, can add a lot of points
with the increasing number of cat owners, various cat related instries will continue to develop, bringing forth new models. Relevant data show that in 2010? In 2020, the scale of China's pet instry will maintain an average annual growth rate of 30.9%. By 2020, the scale will reach 188.5 billion yuan. In the future, this number will continue to grow
Why do cats occupy the world Hemingway said: "a man cannot be defeated, but he can be destroyed by a cat." The destruction here means that a tough man like Hemingway will be tamed by a cat. According to historical data, the history of cat keeping is 5300 years. In the Internet age, cats are everywhere. So, why does this little creature occupy the human worldwhen it comes to cats, many people think of Japan. Japan is the country with the most developed cat culture. They even set up "Cat Day" in 1987 to thank the cats who accompany human beings. In Japan, cats contribute more than 2.3 trillion yen to Japan's GDP than AKB48, the idol group. The emergence of this phenomenon is inseparable from their economic culture
as a developed country, the pace of life in Japan is very fast. Even when people in Tokyo wait for the bus for a while, they will read books, send messages or close their eyes for a nap. Their streets are always full of traffic. As a result, those lazy lying on the side of the road stretching cats, attracted the attention of the Japanese. Cats' secluded quiet state seems to be incompatible with the fast-paced Japan, but it is what they want most in their busy daily life. At this time, lazy cats become their spiritual sustenance. This sustenance extends to the culture, growing a series of economic instries such as cat animation, Cat Island and cat grocery store, forming a good cycle of culture and economy
To some extent, the reasons for the rise of cat culture in China are similar to those in Japan. Since 2010, the change of China's population structure has become more and more obvious, the demographic dividend has faded, and the "empty nest youth" has become the same group of concern as the "empty nest elderly"? 39 years old, working hard in a big city "is the label of the timesNow many people have played the game of keeping electronic pets. Now there is a new kind of electronic pet game, which is completely different from the past. Although this "cat" is not a real "cat", but a small game called cryptokitties, which is based on Ethereum's "encrypted cat", also known as "cloud cat", its popularity is absolutely no less than that of any valuable real cat
one sold for 120000 US dollars, and 70000 were traded in less than two weeks after it was launched.
the online edition of the Sunday Times reported on the 10th that since the game was launched 12 days ago, 70000 encrypted cats have been traded, with a transaction volume of more than 11 million US dollars, about 72.82 million yuan
The phenomenon of
news pictures
has caused many discussions. There is a view that this kind of electronic pet is not the first time to appear. This time it only carries the concept of "block chain". Such a high price is just a bubble. p>
there are also views that, in a sense, this game is the first large-scale application of blockchain in daily scenes. Blockchain ensures the irreplaceability of each cat and may have collection value