The game causing congestion in 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
according to the classification of cryptogames, hot potato, Collectible transaction, spinach and Ponzi are the main game playing methods among the online blockchain games. The most popular games are hot potato games, including two popular games recently - cryptocelebrities and cryptocountries. There are 35 collections and transactions, ranking second, mainly represented by cryptokitties. Spinach and Ponzi are 17, ranking third, with etherroll and etheremon as the star procts
blockchain games also use a variety of themes, from cats, dogs, dragons, pigs and other animals to people, cars, countries, teams and so on
blockchain game 1.0 era
time: November to December 2017
main playing method: Collection + transaction
representative works: cryptokitties, cryptopunks
blockchain technology gives uniqueness to players' digital assets. This graally leads to the concept of NFT (non fungible tokens). The uniqueness and scarcity of people's assets in blockchain games will not change with the game itself. The concept was first applied by cryptopunks, which was launched by larva labs in June of 17. The system randomly generates 10000 punk avatars, which are put on Ethereum through smart contracts and distributed to players for free for trading
when axiom Zen studio added attributes, reproction and auction functions to NFT, cryptokitties was born. People can buy kittens with different attributes, breed with other cats, or sell their own cats through Dutch auction. Kittens with rare and unique genes are wildly sought after by people, and they get a high premium
people continue to develop on the basis of cryptokitties, adding accessories and combat functions, as well as gold digging, feeding, and looting
blockchain game 2.0 era
time: December 2017 to January 2018
main play method: Ponzi like
masterpiece: etheremon
at the beginning, etheremon's play method was very simple and crude. After a player bought a pet, as long as someone bought the same pet, the player could get a small part of eth reward. The game team quickly made a profit of about 2000 eth in a week. Then completely change the way of play, successfully transformed into a collection + combat game. This kind of Ponzi like game was quickly imitated by other manufacturers, and many imitators such as ethertanks and ethertanks appeared<
blockchain game 3.0 era
time: January 2018
main play method: fixed price, forced price hot potato mode
representative works: cryptocelebrities, cryptocountries
players buy encryption celebrities (Nakamoto, musk, etc.) and encryption countries (Japan, the United States, etc.), e to the uniqueness of assets, Subsequent players can only buy from asset owners at a higher price. The price is forced to rise, and the platform earns part of the price difference. At present, the country with the highest price is Japan, about 700 eth, and the most expensive celebrity is Elon Musk, who is worth about 200 eth
blockchain game 4.0 era
time: February 2018
main playing methods: combination of multiple mechanisms
representative works: world.mycollect, cryptocities
in the game, multi-level sales and sharing, player exploration (randomness), lottery, resource uniqueness and other playing methods are adopted. In cryptocities, for example, players can buy countries, continents and the world to "conquer.". The player who conquers the world can get 1% of the transaction volume of the continent and the country, and the player who conquers the continent can get 1% of the transaction volume of the country. In the future, players who conquer the country can get 1% of the transaction value of their subordinate cities. When exploring a new city, players have a chance to explore gems and get eth rewards
at the same time, spinach games also emerged. The high transparency of blockchains makes it easier for them to gain the trust of investors. The more famous ones are etheroll and vdice. They play simply and rudely. Players spend a certain amount of eth to bet on a certain number. When the number randomly generated by the system is less than that number, they can get profits
in addition, there are RPG (ethercraft), battle games (etherbots) and binary (ethermeng king), etc
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advantages and disadvantages of blockchain games
throughout these successful cases, we find that blockchain games do have unique advantages:
high degree of trust: trust is quickly established through open source contracts, the use process is completely transparent, and the information is completely symmetrical. Fairness: data can not be tampered with and rules will never change. Assets belong to indivial players: Players' assets will not be lost with the decline of the game. Strong community attribute: blockchain itself has strong transaction and community attributes
of course, the current blockchain game is also in its infancy, with obvious disadvantages:
unable to interact in time: there are uncertain waiting time and congestion in blockchain transactions, so it is difficult to form timely interaction between players. The cost of sending instructions is high: every time the instructions are sent, gas will be consumed, while the price of eth still makes the cost of gas relatively high. Immature development environment: at present, Ethereum's virtual machine and programming language solidness are the most mature development environment in many public chains. But compared with other popular languages, it is still very immature
3
Gamification will boost the implementation of blockchain
in traditional desktop online games, manufacturers constantly encourage new players, leading to inflation, and the real value of all assets of a game account is often far lower than the players' investment. After the emergence of mobile games, the mode of props binding account and account binding ID card soon became popular. This also makes once the player decides to leave a game, he must give up all the virtual assets in the game. The emergence and continuous maturity of blockchain technology will make the decentralized formulation of game rules and decentralized storage of virtual assets technically feasible. The convenience of virtual assets on the chain also makes the blockchain easier to land in the game scene
cryptogames believes that the development direction of blockchain games, or the development direction of classic games (like basketball, football and chess, once the rules are determined, they will last forever), It must be "decentralized":
the rules are determined by the players through negotiation, and the players supervise each other to ensure that the game is carried out according to the rules. All the props used in the game are owned by the players themselves. If someone breaks the rules or is not happy with the game, they can go away directly. There is no centralized organizer in the game itself.
the popularity of cryptokitties has greatly promoted private wallet, Blockchain game, as an early application of blockchain, has rapidly promoted the popularity of blockchain. Similarly, the use of game development experience and game design concept to develop a game
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
the blockchain pet was originally caused by the fire of crypto kitties. It is the first digital game based on blockchain Technology launched by Ethereum. Each pet is unique and cannot be copied in the world. It is understood that Chuangshi cat was even fired to tens of millions of dollars
as a blockchain pet with great sustainability and playability, the future development prospect of ether clown can not be underestimated!
first of all, it must be pointed out that the relationship between DAPP and app is not the relationship between who replaces who or who eliminates who, but the coexistence relationship, or DAPP is the enrichment and improvement of app< Secondly, DAPP is the proct of the development of the times and the progress of science and technology
because DAPP is directly linked to blockchain technology, it is associated with transaction data, transaction assets, and tamperable decentralized storage< In his book decentralized applications, Johnston believes that a DAPP application should meet all the following conditions:
1. An application must be completely open source, autonomous, and no entity controls most of its tokens. The application must be able to upgrade according to the market feedback and technical requirements, but the upgrade can only be carried out after the application users reach a consensus< Second, the application data must be encrypted and stored on the public blockchain
3. The application must have a token mechanism (it can use the existing token or issue a new built-in token), and the miner or application maintenance node needs to get token reward
fourthly, the generation of application token must be based on the standard encryption algorithm, and valuable nodes can get the token reward of the application according to the algorithm
in short, an application running on the public chain in the form of smart contract can be called DAPP. Different from the conventional app, DAPP's logic (source code), stored proceres and stored results are open and transparent, and can't tamper with the storage logic and content< At present, dapps meeting the above conditions include the following categories:
content dapps -
the coupling between blockchain and content vertical field is very good. Using the characteristics and technology of blockchain, there are more and more platforms to do content, and the competition on this track is extremely fierce, such as steemit abroad, currency, Primas, fulcrum, Youxiang, etc Pressone et al<
DAPP for games -
such as the "blockchain cat raising" incident, which was very popular last year. In this game, players can buy, sell and breed different kinds of kittens. The popularity of this game even caused serious congestion of Ethereum network. Now the blockchain game is not limited to the Buddhist pet game, other blockchain Gobang, drifting bottle, card games and so on
with the development of the times and the more mature and popular blockchain technology, DAPP will be paid more and more attention, and more and more dapps will appear in various scenes of life.
Dragons are commonly portrayed as serpentine or reptilian, hatching from eggs and possessing long, typically scaly, bodies; they are sometimes portrayed as having large eyes, a feature that is the origin for the word for dragon in many cultures, and are often (but not always) portrayed with wings and a fiery breath. Some dragons do not have wings at all, but look more like long snakes.
Although dragons (or dragon-like creatures) occur commonly in legends around the world, different cultures have perceived them differently. Chinese dragons (Simplified Chinese: 龙; Traditional Chinese: 龙; pinyin: lóng), and Eastern dragons generally, are usually seen as benevolent, whereas European dragons are usually malevolent (there are of course exceptions to these rules). Malevolent dragons also occur in Persian mythology (see A Dahaka) and other cultures.
Dragons are often held to have major spiritual significance in various religions and cultures around the world. In many Eastern and Native American cultures dragons were, and in some cultures still are, revered as representative of the primal forces of nature and the universe. They are associated with wisdom—often said to be wiser than humans—and longevity. They are commonly said to possess some form of magic or other supernormal power, and are often associated with wells, rain, and rivers. In some cultures, they are said to be capable of human speech.
Dragons are very popular characters in fantasy literature, role-playing games and video games today.
The term dragoon, for infantry that move around by horse, yet still fight as foot soldiers, is derived from their early firearm, the "dragon", a wide-bore musket that spat flame when it fired, and was thus named for the mythical beast.
Dobrynya Nikitich slaying Zmey Gorynych, by Ivan Bilibin
[edit] Symbolism
In medieval symbolism, dragons were often symbolic of apostasy and treachery, but also of anger and envy, and eventually symbolised great calamity. Several heads were symbolic of decadence and oppression, and also of heresy. They also served as symbols for independence, leadership and strength. Many dragons also represent wisdom; slaying a dragon not only gave access to its treasure hoard, but meant the hero had bested the most cunning of all creatures. In some cultures, especially Chinese, or around the Himalayas, dragons are considered to represent good luck.
Joseph Campbell in the The Power of Myth viewed the dragon as a symbol of divinity or transcendence because it represents the unity of Heaven and Earth by combining the serpent form (earthbound) with the bat/bird form (airborne).
Dragons embody both male and female traits as in the example from Aboriginal myth that raises baby humans to althood training them for survival in the world (Littleton, 2002, p. 646). Another contrast in the way dragons are portrayed is their ability to breathe fire but live in the ocean--water and fire together. And like in the quote from Joseph Campbell above, they also include the opposing elements of earth and sky. Dragons represent the joining of the opposing forces of the cosmos.
Yet another symbolic view of dragons is the Ouroborus, or the dragon encircling and eating its own tail. When shaped like this the dragon becomes a symbol of eternity, natural cycles, and completion.
[edit] In Christianity
The Latin word for a dragon, draco (genitive: draconis), actually means snake or serpent, emphasizing the European association of dragons with snakes. The Medieval Biblical interpretation of the Devil being associated with the serpent who tempted Adam and Eve, thus gave a snake-like dragon connotations of evil. Generally speaking, Biblical literature itself did not portray this association (save for the Book of Revelation, whose treatment of dragons is detailed below). The demonic opponents of God, Christ, or good Christians have commonly been portrayed as reptilian or chimeric.
In the Book of Job Chapter 41, the sea monster Leviathan, which has some dragon-like characteristics.
In Revelation 12:3, an enormous red beast with seven heads is described, whose tail sweeps one third of the stars from heaven down to earth (held to be symbolic of the fall of the angels, though not commonly held among biblical scholars). In most translations, the word "dragon" is used to describe the beast, since in the original Greek the word used is drakon (δράκον).
In iconography, some Catholic saints are depicted in the act of killing a dragon. This is one of the common aspects of Saint George in Egyptian Coptic iconography [1], on the coat of arms of Moscow, and in English and Catalan legend. In Italy, Saint Mercurialis, first bishop of the city of Forlì, is also depicted slaying a dragon.[2] Saint Julian of Le Mans, Saint Veran, Saint Crescentinus, and Saint Leonard of Noblac were also venerated as dragon-slayers.
However, some say that dragons were good, before they fell, as humans did. Also contributing to the good dragon argument in Christianity is the fact that, if they did exist, they were created as were any other creature, as seen in Dragons In Our Midst, a contemporary Christian book series by author Bryan Davis.
[edit] Chinese zodiac
The years 1916, 1928, 1940, 1952, 1964, 1976, 1988, 2000, 2012, 2024, 2036, 2048, 2060 are considered the Year of the Dragon in the Chinese zodiac.
The Chinese zodiac purports that people born in the Year of the Dragon are healthy, energetic, excitable, short-tempered, and stubborn. They are also supposedly honest, sensitive, brave, and inspire confidence and trust. The Chinese zodiac purports that Dragon people are the most eccentric of any in the eastern zodiac. They supposedly neither borrow money nor make flowery speeches, but tend to be soft-hearted which sometimes gives others an advantage over them. They are purported to be compatible with Rats, Snakes, Monkeys, and Roosters.
[edit] In East Asia
Main article: Chinese dragon
Main article: Vietnamese dragon
Dragons are commonly symbols of good luck/health in some parts of Asia, and are also sometimes worshipped. Asian dragons are considered as mythical rulers of weather, specifically rain and water, and are usually depicted as the guardians of flaming pearls.
In China, as well as in Japan and Korea, the Azure Dragon is one of the Four Symbols of the Chinese constellation, representing spring (season), the element of Wood and the east. Chinese dragons are often shown with large pearls in their grasp, though some say that it is really the dragon's egg. The chinese believed that the dragons lived under water most of the time, and would sometimes offer rice as a gift to the dragons. The dragons were not shown with wings like the European dragons because it was believed they could fly using magic.
A Yellow dragon (Huang long) with five claws on each foot, on the other hand, symbolize imperial authority in China, and indirectly the Chinese people as well. Chinese people often use the term "Descendants of the Dragon" as a sign of ethnic identity. The dragon is also the symbol of royalty in Bhutan (whose sovereign is known as Druk Gyalpo, or Dragon King).
In Vietnam, the dragon (Vietnamese: rồng) is the most important and sacred symbol. According to the ancient creation myth of the Kinh people, all Vietnamese people are descended from dragons through Lạc Long Quân, who married Âu Cơ, a fairy. The eldest of their 100 sons founded the first dynasty of Hùng Vương Emperors.
[edit] History and origins of dragons
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A naga guarding the Temple of Wat Sisaket in Viang Chan, LaosWhere the original concept of a dragon came from is unknown, as there is no accepted scientific theory or any evidence to support that dragons actually exist or have existed.
Some believe that the dragon may have had a real-life counterpart from which the legends around the world arose — typically dinosaurs or other archosaurs are mentioned as a possibility — but there is no physical evidence to support this claim, only alleged sightings collected by cryptozoologists. In a common variation of this hypothesis, giant lizards such as Megalania are substituted for the living dinosaurs. Some Creationists hold that dragons are just an exaggerated depiction of what we now call dinosaurs and that humans and dinosaurs (dragons) did co-exist.[1] All of these hypotheses are widely considered to be pseudoscience or myth.
Dinosaur fossils were once thought of as "dragon bones" — a discovery in 300 BC in Wucheng, Sichuan, China, was labeled as such by Chang Qu.[2] It is unlikely, however, that these finds alone prompted the legends of flying monsters, but may have served to reinforce them.
Herodotus, often called the "father of history", visited Judea c.450 BC and wrote that he heard of caged dragons in nearby Arabia, near Petra, Jordan. Curious, he travelled to the area and found many skeletal remains of serpents and mentioned reports of flying serpents flying from Arabia into Egypt but being fought off by Ibises Histories. Histories (Greek). Retrieved on 2006-06-14..
According to Marco Polo's journals, Polo was walking through Anatolia into Persia and came upon real live flying