We've already discussed how you can make a fungible token using ERC20 (opens in a new tab), but what if you want to create tokens that are not alike at all? What we are BuildingĬryptoKitties really braced the growth and use case of NFTs we see today and in this tutorial, we will walk through creating and deploying an ERC-721 smart contract and minting the token on Optimism Kovan-Testnet using Solidity (opens in a new tab)↗, Hardhat (opens in a new tab)↗ and Pinata (opens in a new tab)↗.īy the end of this tutorial - you'll be able to mint an NFT and display it on Quixotic (opens in a new tab)↗ (an NFT marketplace on Optimism) from your deployed ERC721 contract. Before the dawn of ERC-721, tokens on blockchain were only fungible, meaning they can be traded or exchanged with another identical one of the same value, much like a dollar bill. Originally built on the Ethereum blockchain, CryptoKitties was the first non-fungible token (NFT) that allowed the creation of unique digital collectibles as kitties, using the ERC-721 smart contract. Mention NFT revolution and you will most likely stumble upon this project over and over again: CryptoKitties.

Accessed ĬryptoKitties cooldown speed.CryptoKitties-Like NFT with ERC-721 Smart Contract Deploy and Mint a CryptoKitties-Like NFT with ERC-721 Smart Contract The concept of fairness in financial transactions.

ĭucuing, C.: How to make sure my cryptokitties are here forever? The complementary roles of blockchain and the law to bring trust. Serada, A., Sihvonen, T., Tuomas Harviainen, J.: CryptoKitties and the new ludic economy: how blockchain introduces value, ownership, and scarcity in digital gaming. ĬryptoKitties official guide for family jewels. Nick Szabo: Smart Contracts: Building Blocks for Digital Markets (2018)Īxiom Zen: CryptoKitties: Collectible and Breedable Cats Empowered by Blockchain Technology (2017). Satoshi Nakamoto: Bitcoin: A Peer-to-Peer Electronic Cash System (2008). CryptoKitties’ users and economic effect.

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