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Questions tagged [cryptokitties]

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1
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1answer
18 views

How much money was spent on gas for CryptoKitties transactions?

Just the main NFT contract for CryptoKitties, not the auction sale or other helper contracts. Bonus points if you can also include billable transactions that started from another contract and then ...
0
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2answers
21 views

CryptoKitty birth and auction clock

How does CryptoKitty implement scheduling functions such as give birth function or auction ending function. I tried to track it through Eth Fiddle but didn't find how it was done. Is there a ...
0
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1answer
29 views

How does CryptoKitties query price data? (To make filters)

so I was just wondering on how CryptoKitties work. Like in order to query the price of each Kitty, do they querry like every single Kitty's price and then sort it out. Or is there a function or a ...
0
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1answer
203 views

Hardware wallet support of ERC-721 or Storing cryptokitties on Ledger Nano

I have a question related to hardware wallet support of ERC 721 tokens. I plan to move a cryptokittie to a Ledger Nano wallet. It's relatively easy to send it to an account controlled by Ledger. In ...
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2answers
1k views

Why cryptokitties uses storage instead of memory?

There are a lot of explainations of storage and memory out there like this question or this question. But I'm wondering why cryptokitties for example uses storage instead of memory in many functions. ...
1
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1answer
112 views

How does crypto kitties lists their auctions?

Crypto Kitties offers a marketplace where you can buy kitties. The functionality is handeled by a contract called SaleClockAuction. This contract inherits from ClockAuctionBase where all auctions are ...
0
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1answer
116 views

Creating a new UI for a token

Is it possible to create an user interface for a new token created with ERC20 and metaMask? If yes, how is it possible?
2
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1answer
33 views

Pointing to other contracts in solidity?

I'm doing the CryptoZombies tutorial to get a better handle on solidity and in one of the chapters it contains the following code pragma solidity ^0.4.19; import "./zombiefactory.sol"; contract ...
1
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1answer
82 views

On what frameworks are sites like Cryptokitties made?

Game contracts are written on Solidity. On what frameworks are sites like Cryptokitties and other games made? (Node js, React, Vue or something else?)
-1
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1answer
226 views

How to display a list of ERC721 items starting from a pubblic address

I'd like to understand more about this ERC721 non-fungible tokens. I bought some cryptokitties (non 721), some art on KnownOrigin and now I want to display them in a web page. For Cryptokitties I'm ...
1
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1answer
118 views

Which ethereum dapps are 100% decentralized and not semi-decentralized (centralized)?

Correct me if I'm wrong here, but I see dapps as independent solo code that you can download to you computer and it interacts with the Ethereum blockchain. Looking at crypto kitties, you have to ...
2
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1answer
35 views

Duplicating data on server and contract

If I'm building a dapp, is it worthwhile to store information that is in the contract on a server for speed purposes, and only using the contract to track ownership of tokens. I.e. for something ...
1
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1answer
132 views

Why is the CryptoKitties contract balance not the same as their revenue?

I am doing research about the CryptoKitties game. I see that its revenue is about 12M USD. But when I visit the CryptoKitties Smart Contract I see that the revenue is about 220k USD only. I think I ...
1
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3answers
1k views

How are cryptokitties stored on the blockchain?

I'm trying to understand how crypto unique tokens are stored on the blockchain and how is it linked to a graphic of this token. In the case of cryptokitties, each kitty is generated randomly by the ...
1
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0answers
23 views

unable to buy crypto kittie - why is my transaction not going thru?

I have tried everything in order to buy a crypto kittie however I have not been able to get a transaction to go thru. In the following receipt you can see I give a Gas Limit of 250,000 and a gas price ...
1
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1answer
62 views

buying crypto kittie TxReceipt Status: Fail

I'm confused about the following. I'm trying to buy a crypto kittie which price is 0.0038 ETH. On myetherwaller the following window is shown. "Amount send in most cases you should leave this to 0" ...
2
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1answer
299 views

Myetherwallet Insufficient balance for transactionGas limit set dangerously high. Approving this transaction is likely to fail

I'm trying to buy a cripto kittie that costs 0.0035 ETH which is around 3.14 dollars. I'm using my ether wallet for the transaction and when I set up the Gas Limit I get the following error on ...
-1
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1answer
42 views

what is /*** CONSTANTS ***/ and /*** STORAGE ***/ in solidity?

I was going through cryptokitties contract and I found following two words /*** CONSTANTS ***/ /*** STORAGE ***/ Are these any keywords in solidity or do they have any significance?
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2answers
387 views

Why does sign transaction pops up in cryptokitties?

I did some web3.js projects and also worked with MetaMask. But I've never seen this window popping up in MetaMask - as it does when signing up for cryptokitties. Confirm Transaction Sign Message ...
1
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1answer
201 views

Specific to Cryptokitties — Trying to learn how SaleClockAuction works

I'm trying to understand, how the actual process of putting something up for auction works and also how does web3 interact with this auction. Here are my findings till now: I think that ...
4
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1answer
3k views

How to create your own ERC 721 NFT token [closed]

I am trying to create my own ERC-721 non fungible token and unable to find any docs, basic code and how to deploy it on a testnet. Could someone share the official specification and an example of how ...
0
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1answer
56 views

Did cryptokitties have a negative effect on Ethereum? [closed]

I received a comment from a professional Bitcoin exchange where the person said that cryptokitties have had a negative effect on the ether. What could that mean? Is it true?
1
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2answers
263 views

Is it worth developing on ethereum? Will the chain last? [closed]

After crypto kitties, many people are wondering if the scaling issue will ever be solved. The traffic is exponential, what would happen if 2 more crypto kitties came out at the same time? I decided ...
0
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1answer
125 views

Ethereum Wallet cannot complie “msg.sender.send”

I have been using Ethereum Wallet to compile and deploy contracts. Now I got this error when trying to test the code in CryptoKittyCore. It failed to compile with this message Failure condition of '...
6
votes
1answer
394 views

How can I programmatically get a sales history of CryptoKitties?

The pages http://www.kittyexplorer.com/prices/ and https://kittysales.herokuapp.com/ show sales with prices and the IDs of the cats sold. How could I implement such a functionality programmatically? ...
9
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2answers
3k views

How does cryptokitties work with smart contracts and is there a random element to it?

I'm totally new to cryptokitties, but my understanding of cryptokitties so far is: It's a smart contract that generates new kitties according to your ethereum address. My questions are: If you are ...