CryptoCoinsInfoClub.com

Cryptokitties Source Code

Kittens On The Blockchain Is The Future Nobody Asked For

Kittens On The Blockchain Is The Future Nobody Asked For

Kittens on the blockchain is the future nobody asked for Cryptocurrency has an uncertain future, but the digital ledger powering most of their transactions is here to stay. Granted, cryptocurrency probably is too, but this isnt meant to be a rant about dot com-era bubbles we can argue about it on Twitter thought, come at me . The benefits offered by blockchain are numerous, and each passing day brings an ever-more-creative way to use it. Ill leave it to you to decide if CryptoKitties is one of them. CryptoKitties are basically 2017s version of Neopets, only with a traceable lineage. Using the same ledger technology that verifies Ether and Bitcoin transactions, collectors can buy, sell, trade, and breed their digital kittens. Each kitten has a unique lineage and characteristics, such as Kitty #25493, which looks like the bastard spawn of a Matthew Inman illustration . If you can live the rest of your life knowing this is the kitten you chose to spend your hard earned cash on, you can purchase the little fuzzball for 0.2571 ETH ($118.46 as of this writing), thats Ether in case you havent been paying attention. According to the website, each cat is one-of-a-kind, and solely owned by you unless you decide to trade or sell it to another CryptoKitties enthusiast. Each offspring two paired cats produce is also unique, there will never be another just like it. Which, judging by the looks of a few of these creations, were sure is a good thing. Still, I wanted to hate this game. I wanted to call it the flavor of the week blockchain app that really didnt make sense yet existed despite all evidence to the contrary it should. But I dont. Im not going to be collecting digital cats anytime soon, but its not hard to imagine a place for this. We did, after all, once go nuts over Neopet Continue reading >>

Learn To Code Ethereum Dapps By Building Your Own Game | Hacker News

Learn To Code Ethereum Dapps By Building Your Own Game | Hacker News

There's a lot of hate on here for blockchain gaming/rare digital art so I'd like to clarify two points. 1. Blockchain games are best when only the necessary work is done on chain, such as transfer of ownership or enforcement of critical rules at run time. This tutorial may not show that so as to demonstrate the power of the blockchain, but most people in the space are building only the components players want to not be controlled by a central entity into the blockchain. It works fine. 2. The lack of digital scarcity is a real problem for artists. Blockchain art is a real solution. Artists I talk to are extremely excited about the ability to issue limited/special editions of their art on the blockchain that can owned and traded by their biggest fans. It's not about hiding the source art (image, music, etc) from the public, it's about having "signed" and "authentic" editions folks can collect and trade. They've lost that ability in the digital art world and this gives it back to them. fans like to give one time tokens of appreciation to artists. and then maybe hang it on a wall and forget. collectors and tax avoiders like to invest in scarce art (hence why they only assign big made-up values to the work of dead artists) and so they will be the only ones really interested in maintaining a block chain to authenticate their investment. One of the CryptoZombies creators here. This comment is spot-on. In the realm of gaming, digital ownership of in-game assets is one area we're really excited about. Economies have already sprung up in many online games around selling items for real-world cash. With something like ERC721 tokens on Ethereum, you would truly own your items outside of the company's web server. No one could take them away from you, the items could be provably scar Continue reading >>

Hacking The Cryptokitties Genome

Hacking The Cryptokitties Genome

My friend Anshul recently told me about CryptoKitties. I had heard about it clogging up the ETH pipes and causing the price to drop but had not realized what an amazing design the CryptoKitties team had realized. CryptoKitties are basically breed-able beanie babies built on top of the ethereum blockchain. And yet, they are also so much more than that: CryptoKitties are a digital playground where programmers, geneticists, and experts in economics, bioinformatics, machine learning and game theory can come together to learn and play. For those of you new to CryptoKitties, have a look at the Mashable guide ; this will teach you the basics of the CryptoKitties game system. To get a better view of exactly just what a kitty is you can go through the CryptokittiesCore contract . Youll find that a CryptoKitty is basically a struct on the EVM that looks like this. function isGeneScience() public pure returns (bool); /// @dev given genes of kitten 1 & 2, return a genetic combination - may have a random factor /// @return the genes that are supposed to be passed down the child function mixGenes(uint256 genes1, uint256 genes2, uint256 targetBlock) public returns (uint256); Wow a secret. This is THE secret. If youve been playing cryptokitties you know this is how kitties are produced. Youll notice that siring kitties produces offspring in a manner that feels intuitive: features get passed on from parents to offspring sometimes but not always, sometimes skipping generations. This is the code that runs at the conception of cryptokitties with non-zero generations. A brief genetics remedial from your 10th grade biology class A phenotype (from Greek phainein, meaning to show , and typos, meaning type) is the composite of an organism s observable characteristics or traits , such as its mo Continue reading >>

How To Code Your Own Cryptokitties-style Game Onethereum

How To Code Your Own Cryptokitties-style Game Onethereum

Co-founder at Loom Network. Building scalable blockchains for large-scale online games and social apps Creators of CryptoZombies.io How to Code Your Own CryptoKitties-Style Game onEthereum CryptoKitties has done a great job of demonstrating what blockchains can be used for beyond just simple financial transactions. Im hoping well start to see a lot more innovative uses of the blockchain for games like this in the future, so I wanted to write a quick walkthrough of the code behind CryptoKitties to show how it was implemented beneath the surface. This article is written for developers, and while its not an absolute-beginners introduction to Solidity, I tried to include links to documentation to make it as accessible as possible to developers of all levels. Almost all of the CryptoKitties code is open source, so the best way to figure out how it works is to read through the source code. Its around 2,000 lines total, so in this article Im going to be walking through only the sections I think are most important. But heres a copy of the full contract code on EthFiddle if you want to read through it on your own: Powered by EthFiddle, the #1 Solidity code-sharing siteethfiddle.com If youre not familiar with what CryptoKitties is, its basically a game for buying, selling, and breeding digital cats. Each cat has a unique appearance that is defined by its genes, and when you breed 2 cats together, their genes combine in a unique way to produce an offspring, which you can then breed or sell. The code for CryptoKitties is split into a number of smaller contracts in order to keep related code bundled together without having one single giant file with everything in it. The subcontract inheritance for the main kitty contract looks like this: contract KittyOwnership is KittyBase, ERC72 Continue reading >>

Cryptokitties Broke Ethereum. Heres Why They Would Thrive On Enjincoin

Cryptokitties Broke Ethereum. Heres Why They Would Thrive On Enjincoin

Gaming Network & Smart Cryptocurrency for Gaming CryptoKitties Broke Ethereum. Heres Why They Would Thrive on EnjinCoin CryptoKitties have clogged the network. Enjin Coins original architecture is designed to solve thisproblem. Unfortunately, Ethereum platform is having a bit of trouble with handling CryptoKitties. The game accounts for more than 10% of the activity on Ethereum blockchain, the network is clogged, and the team behind the game had to resort to increasing the gas price in order to keep the game stable. Enjin Coin was mentioned on VentureBeat as a project that aims to fix this and take gaming to the next level, so we felt a need to explain how we solved this problem. The Enjin Coin platform is optimized for low gas fees and fast response in modern video games, and would allow building rich games like CryptoKitties without the associated network problems. Contract storage is the most costly operation that can be performed on Ethereum. Enjin Coins philosophy is to have a rich client and minimal blockchain. Games using Enjin Coin items will not suffer from high gas fees, because all the metadata for items is handled by the games themselves. The blockchain only needs to maintain the smallest necessary amount of data needed to validate a players ownership. We were the first to pioneer the concept of a monolithic token contract , and this idea is now being used in games like CryptoKitties and their proposal for an ERC-721 standard. In our design , all tokens are stored in a single smart contract, which drastically reduces the fees associated with deploying new tokens. Almost every ERC-20 token on Ethereum today is bloating the blockchain and making it more expensive to use, because up to 99% of token code is redundant. Our innovative solution was to re-use all s Continue reading >>

Github - Dapperlabs/cryptokitties-bounty: Bounty Program For Cryptokitties Smart Contract

Github - Dapperlabs/cryptokitties-bounty: Bounty Program For Cryptokitties Smart Contract

The CryptoKitty Bounty Program is NOW CLOSED Thank you everyone for your participation!! Please stay tuned for rewards! CryptoKitty Bounty ProgramCryptoKitties recognizes the importance of security researchers in keeping our community safe and fun. With the launch of CryptoKitties around the corner, we would love the community to help provide disclosure of security vulnerabilities via our bounty program described below. What you Should Know About CryptoKitties: CryptoKitties is a game centered around breedable, collectible, and oh-so-adorable creatures we call CryptoKitties! Each cat is one-of-a-kind and 100% owned by you; it cannot be replicated, taken away, or destroyed. CryptoKitties are non-fungible tokens (see ERC #721 ) that are indivisible and unique. The smart contracts have over 4-billion variations of phenotypes (what you see) and genotypes (what you dont see). Because cats are tokens on a blockchain, they can be bought, sold, or transferred digitally, with strong guarantees of ownership. CryptoKitties is built on the Ethereum network; ether will be necessary to fuel transactions, which include purchasing, trading, and breeding CryptoKitties. For the purpose of this bounty program, the program will run within the Rinkeby test network. Also the source code will be available for review. Two CryptoKitties can breed a new CryptoKitty. Kitties do not have a permanently assigned gender. While they can only engage in one breeding session at one time, each Kitty is able to act as either matron or sire. The owner chooses per breeding interaction! This bounty program will run within the Rinkeby network from 12:01am GMT November 16th - 11:59pm GMT November 20th, 2017. All code important to this bounty program is publicly available within this repoHelp us identify bugs, Continue reading >>

Scratch That: Cryptokitties Isn't Quite Ethereum's Vision For Apps - Coindesk

Scratch That: Cryptokitties Isn't Quite Ethereum's Vision For Apps - Coindesk

Scratch That: CryptoKitties Isn't Quite Ethereum's Vision for Apps Ethereum creator Vitalik Buterin cried himself to sleep the night "World of Warcraft" maker Blizzard Entertainment altered his "belovedwarlock's Siphon Life spell." According to Buterin, the online role-playing game forever changed his outlook toward app development."On that day, I realized what horrors centralized services can bring," he writes on his official "About.me." Aspiring to offer a "world computer," ethereum has sought to stop similar occurrences by providing a platform on which decentralized applications (dapps) can run. But while a whole slew of startups is developing ethereum solutions for everything from social media to file sharing, none have yet to see a large, mainstream audience. An internet-based game for buying, selling and breeding adorable digital kittens, CryptoKitties has found itself in the center of a pop culture storm. Many have lauded the app for giving new users an easy, fun way to learn about cryptocurrency protocols, but others are strongly opposed to the app, which has been the cause of serious backlogs and rising transaction fees on the network. But there's another issue with CryptoKitties that's being increasing called to attention: namely, your kitty isn't as decentralized as you think. As least, that's the contention of some critics , who claim CryptoKitties, like World of Warcraft before it, is under the control of a central authority. Widely heralded as an unprecedented success for ethereum, questions have now begun to emerge about whether it's at the sacrifice of the fundamental concept of the project. What's to stop the owner of the CryptoKitties smart contract, Kitty Core, from editing the algorithm and mutating a kitty against the will of its owner? According t Continue reading >>

Ethereum Accounts, Address And Contracts

Ethereum Accounts, Address And Contracts

pragma solidity ^0.4.11;/** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) onlyOwner { if (newOwner != address(0)) { owner = newOwner; } }}/// @title Interface for contracts conforming to ERC-721: Non-Fungible Tokens/// @author Dieter Shirley < [emailprotected] > (ERC721 { // Required methods function totalSupply() public view returns (uint256 total); function balanceOf(address _owner) public view returns (uint256 balance); function ownerOf(uint256 _tokenId) external view returns (address owner); function approve(address _to, uint256 _tokenId) external; function transfer(address _to, uint256 _tokenId) external; function transferFrom(address _from, address _to, uint256 _tokenId) external; // Events event Transfer(address from, address to, uint256 tokenId); event Approval(address owner, address approved, uint256 tokenId); // Optional // function name() public view returns (string name); // function symbol() public view returns (string symbol); // function tokensOfOwner(address _owner) external view returns (uint256[] tokenIds); // function tokenMetadata(uint256 _tokenId, string _preferredTransport) public view returns (string infoUrl); // ERC- Continue reading >>

This Man Has Made More Money Trading Cryptokitties Than Investing In His Ira

This Man Has Made More Money Trading Cryptokitties Than Investing In His Ira

This man has made more money trading cryptokitties than investing in his IRA CryptoKitties, a game where users breed and trade digital kitties using Ethereum-based smart contracts, has emerged as the latest mark of societys obsession with rising cryptocurrency values. In some ways, the popularity of the game reflects the skyrocketing values of digital currencies like Bitcoin and Ether. Total sales on the platform created by Canadian startup Axiom Zen have reportedly hit $12 million, according to Coin Telegraph , as some cats with rare attributes have been sold for upwards of $80,000 . Cryptokitties are generated by code, and bred by spending Ether tokens on smart contracts that use two base cats to create a new one. Each resulting cat is unique and persistent, recorded on Ethereums public ledger. While the game has proven wildly popular, CryptoKitties has also been plagued by network slowdowns, little game progression and automated bots that snipe deals. Its also placing a new load on the currency itself. The game has slowed down the Ethereum network by as much as 11 percent, Motherboard reported last week. But as the first successful game built on the Ethereum network, CryptoKitties success has hinted at the greater potential of apps powered by blockchain technology and given rise to a new wave of cryptocurrency speculation. Like Bitcoin and Ethereum, CryptoKitties allowed speculators to make a lot of money if they got in at the right time. One of those speculators is Todd, who wished to remain anonymous in order to disclose personal financial details. While we talked, the CryptoKitties site dipped in and out of commission. Todd is a 30-year-old entrepreneur and software designer from Austin, Texas. Hes also been the owner of 35 cryptokitties , an extension of his bro Continue reading >>

Cryptokitties: The Tech Behind Thecraze

Cryptokitties: The Tech Behind Thecraze

Kitties have officially taken over the blockchain. Several articles have been written about the kitty phenomena and they have received significant mainstream exposure as well. In fact, even Vitalik Buterin has gotten in on the act! So, just to give you a very brief idea , cryptokitties is one of the first games that has been created on the blockchain. The idea is to breed, collect and hold digital kitties. The game was made by Vancouver based blockchain company Axiom Zen . Like I have said before, there have been many articles written on the topic and that you can checkout. In this article, we are going to look under the hood. We are going to see the nuts and bolts that powers this whole system. Also I want to aPAWlogise in advance for all the cat puns (it has begun already hasnt it?). Genetic algorithm is an optimisation technique used to solve non-linear optimisation problems. It works pretty much the way biological genetics works. It starts with an initial generation of candidate solutions that have been tests against the objective function. The algorithm then generates subsequent solutions from these parent solutions using bio-inspired operators like: selection, crossover, and mutation. While the genes inside our body consists of proteins and various other elements, in GA they are represented via numbers. So lets take a look at how evolution works using genetic algorithm. We will only be using binary cases i.e. cases where the genes can be represented as 1s and 0s. Selection: Selection basically means retaining the best performing parents from one generation to the next. These well-performing parents are the ones that are preferred for reproduction. So eg. the two parents chosen via selection are: Cryptokitties uses the Genetic Algorithm to create a new kitty. It u Continue reading >>

Cryptokitties Craze Slows Down Transactions On Ethereum

Cryptokitties Craze Slows Down Transactions On Ethereum

CryptoKitties craze slows down transactions on Ethereum These are external links and will open in a new window A new craze for virtual kittens is slowing down trade in one of the largest crypto-currencies. CryptoKitties lets players buy and breed "crypto-pets" on Ethereum's underlying blockchain network. The game's developers told the Bloomberg news agency that CryptoKitties was a "key step" to making blockchains more accessible. But its popularity has underscored one of the technology's biggest downsides: its lack of scalability. Etherscan has reported a sixfold increase in pending transactions on Ethereum since the game's release, by the Axiom Zen innovation studio, on 28 November. "CryptoKitties has become so popular that it's taking up a significant amount of available space for transactions on the Ethereum platform," said Garrick Hileman, from the University of Cambridge. "Some people are concerned that a frivolous game is now going to be crowding out more serious, significant-seeming business uses." An estimated $4.5m (3.35m) has been spent on the cartoon cats at the time of writing, according to Crypto Kitty Sales . Image caption CryptoKitties is the first game built on Ethereum Think of these rather unpalatable cartoon kittens as unique digital Pokemon cards. The game's developers describe them as "breedable Beanie Babies", each with its own unique 256-bit genome. These crypto-collectibles are also gender-fluid, able to play the role of either the "dame" or the "sire" when bred together. The kitties' unique DNA can lead to four billion possible genetic variations. Some of the varieties created so far look lifelike, with grey striped fur and bulging green eyes. Others are speckled with neon-blue spots or magenta-patterned swirls. Image caption One of the less at Continue reading >>

How Cryptokitties Started The Ethereum App Revolution

How Cryptokitties Started The Ethereum App Revolution

How CryptoKitties started the Ethereum app revolution Like you have apps on your smartphone WhatsApp, Facebook, and so on blockchain enthusiast are creating apps for decentralised systems. Decentralised applications (called dApps) run on the Ethereum blockchain as collections of smart contracts autonomous transactions which are controlled by their own custom code. The first dApp to court mainstream attention was CryptoKitties , a game which saw players purchasing, breeding, and trading digital cats using cryptocurrency. CryptoKitties saw massive success, and this started a flurry of activity in the world ofdApp development. Decentralised applications are run by every node on the Ethereum blockchain and cannot be censored or controlled by centralised parties. This makes smart contracts useful for applications such as loans and asset transferral. CryptoKitties and the games which have followed it leverage the immutability of the Ethereum blockchain by instantiating their assets as non-fungible tokens. Each token is different and has its own set of attributes, from which it derives its value. It is important to note that when you receive a CryptoKitty by purchasing it from an Ethereum wallet, a token is actually sent to your wallet and cannot be manipulated by anyone else. Even if the CryptoKitties website was destroyed and the company dissolved, you would still hold a CryptoKitty token in your wallet. Contracts built on the Ethereum blockchain are also visible to everyone and can only be adapted if permissions are published in the contracts initial code. This allows users to audit the code behind any decentralised application they use and decide whether to trust the service. While the development of dApps is still in its infancy and limited by the scaling obstacles of th Continue reading >>

The Big Business Of Cryptokitties Is Being Automated

The Big Business Of Cryptokitties Is Being Automated

The Big Business of CryptoKitties Is Being Automated Great, now digital kitten mills are a thing. The most popular use of Ethereum right now isnt startup fundraising or anything even remotely useful. Instead, people are sucking up Ethereums resources to breed and trade digital cats called CryptoKitties. Theyre basically Beanie Babies, except they dont physically exist, and so far the Ethereum community has collectively spent over $2 million USD on them. With so much money on the line, some CryptoKitty players are coding tools to automate parts of their digital kitten mills, mostly with apps that scan for high-value kitties. At least one tool on GitHub, an online repository for open source code, purports to be a trading bot. Organic CryptoKitty traffic is already clogging up the entire Ethereum network , and the specter of bots has made some manual users understandably frustrated . Read More: 11% of Traffic on the Ethereum Blockchain Is Being Used to Breed Digital Cats CryptoKitties is an app by Canadian startup Axiom Zen, and it was introduced to the world at an Ethereum hackathon at the University of Waterloo in October. The game works like this: the CryptoKitty code continually generates new, basic cats (called gen0 kitties), which the community then breeds and trades. Breeding two kitties involves sending some ether, Ethereums in-house cryptocurrency, to smart contracts that use the two base values to create a new one: a brand new kitty! Its all on the blockchain, in public view, which means that every CryptoKitty is provably unique. Some kitties have sold for as much as $75,000 USD . One Reddit user, who posted that they (manually) buy cheap gen0 cats just to breed and sell, told me in a private message that they are considering canceling a vacation to the Grand Ca Continue reading >>

What Is Cryptokitties? A Beginners Guide On The Blockchain Collectible Cats

What Is Cryptokitties? A Beginners Guide On The Blockchain Collectible Cats

What is CryptoKitties? A Beginners Guide on the Blockchain Collectible Cats What is CryptoKitties? A Beginners Guide on the Blockchain Collectible Cats Last December, a new game became a trending fad in the blockchain world. Collectible CryptoKitties allowed users to buy, own, and trade unique, adorable cartoon cats on the blockchain. Around the time of launch, CryptoKitties was so successful that it slowed the Ethereum network. Just a few days after launch, users had already spent over $1 million on these collectible cats. The cool thing about CryptoKitties is theyre a demonstration. Of course, theyre fun and cute on their own. However, they also show the potential of blockchain for trading and securing digital assets. This was the driving principle behind the creation of CryptoKitties. In the white paper, the founders discuss the narrow focus of most blockchain projects on payments. Ultimately, they hoped CryptoKitties would help people expand their vision of what a blockchain could do. Most blockchain projects launch with a cryptocurrency. These are tradable tokens that represent some utility value in a project or even a share in a company. Token offerings have become an incredibly successful fundraising device for new startups. In some cases, too successful as projects with minimal expertise or roadmap can raise millions of dollars. CryptoKitties are not a currency. Instead, theyre blockchain assets. Theyre structured similarly to most other tokens. However, they have one major difference. Each CryptoKitty is unique, and theyre not meant to be fungible. Fungibility is key for a currency. It means that a dollar is a dollar, no matter where you got it, what year it was minted, or where it has been before you received it. They have value because we agree on their valu Continue reading >>

Learn What Are Cryptokitties? The Most Comprehensive Guide Written

Learn What Are Cryptokitties? The Most Comprehensive Guide Written

Learn What Are Cryptokitties? The Most Comprehensive Guide Written What Are Cryptokitties? Crash Course.Over the last year or so DAPPs aka Decentralised Applications have slowly gained a lot of steam. As you are probably aware of, a DAPP is not owned by any central organization and it represents a much-needed paradigm shift in an increasingly centralized world. However, for DAPPs to get the proper mainstream exposure they deserve, one of them had to break through and make it big. (Yes technically speaking Bitcoin is a DAPP as well, but we are not talking about store-of-value here). Sure, there have been several DAPPs before which got some exposure but something had to make it big and capture the publics imagination. Cryptokitties is a blockchain-based virtual game that allows players to adopt, raise, and trade virtual cats. The game was made by Vancouver based blockchain company Axiom Zen. However, what is truly important to remember is that this is the first known application of DAPP for leisure and recreation. Sales of Cryptokitties have been through the roof. People have spent more than twelve million dollars buying these cryptokitties. There are even reports of people who have made more money trading cyptokitties than investing in their IRA! Lets look at how many sales have been made per day: Several articles have been written about the kitty phenomena and they have received significant mainstream exposure as well. In fact, even Vitalik has gotten in on the act! Each kitty has its own unique 256-bit unique genome code. Which is carried down to all its descendent kitties via the use of Genetic Algorithm. The genetic algorithm is an optimization technique used to solve nonlinear optimization problems. It works pretty much the way biological genetics works. It starts Continue reading >>

More in ethereum