NFT's or Non Fungible Token's are a new technology phenomenon allowing clear ownership and easy transferability of digital art. This property means each token is unique and cannot be swapped identically for another token ever. NFT can be most anything digital, such as art, images, videos, music, memes, and tweets. The process of creating NFTs is “minting”, similar in concept to metal coins that are minted (stamped) to confirm their legitimacy. Minting an NFT produces a one-of-a-kind token on the blockchain and an electronic certificate of authenticity. NFT Marketplace for Images is used to generate the cryptoboy using the NFT, Blockchain, Cryptocurrency. The generated cryptoboy can be able to sell and they can see who the token owner and token metadata.


1)Mint custom ERC721 implemented Crypto Boy Tokens. 2)Sell Crypto Boy tokens on the marketplace. 3)Set desired token price. 4)Toggle between keeping the token for sale and not for sale. 5)Keeps track of all the tokens owned by an account - minted and bought. 6)Query blockchain for the token owner and token metadata. 7)User can mint a token only after every 5 minutes. Scope: NFTs used in cryptoboy are digitally unique, no two NFTs are the same. Every NFT used in cryptoboy must have an owner and this is of public record and easy for anyone to verify.

Technological Innovation:

1.NFT: NFTs are unique cryptographic tokens that exist on a blockchain and they cannot be replaced or copied/paste a new NFT into existence it is recorded in a blockchain. And that is used to certify authenticity and ownership as a digital asset. It’s generally built using the same kind of programming as cryptocurrency, like Bitcoin or Ethereum, but that’s where the similarity ends. 2.Blockchain: Blockchain is a system it is used to record information in a way it makes difficult or impossible to change, hack, or cheat the system. A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain. The primary use of blockchains is as a distributed ledger for cryptocurrencies such as bitcoin. 3.Cryptocurrencies: Mostly cryptocurrencies use blockchain technology to record transactions, in which transactions are verified and records maintained by a decentralized system using cryptography, rather than by a centralized authority.

Browser Extension

Metamask: MetaMask-extension library is a software cryptocurrency wallet used to interact with the Ethereum blockchain. It allow users to access their Ethereum wallet through a browser extension or mobile app, which can then be used to interact with decentralized applications.


Solidity - Object-oriented, high-level language for implementing smart contracts. Bootstrap 4 - CSS framework for faster and easier web development. React.js - JavaScript library for building user interfaces. web3.js - Allow users to interact with a local or remote ethereum node using HTTP, IPC or WebSocket. Truffle - Development environment, testing framework and asset pipeline for blockchains using the Ethereum Virtual Machine (EVM). Ganache - Personal blockchain for Ethereum development used to deploy contracts, develop DApps, and run tests.


1. While running batch file, if you encounter Windows protection alert, select More info --> Run anyway. 2. During kit installer, if you encounter a Windows security alert, click Allow. 3. Ensure Ganache is open before running the 1-Click Installer. 4. Make sure you have chosen the Ganache Network in the Metamask Extension. 5. Sometimes you may face the "out of gas error" to resolve this error, edit the "Gas Limit".

Development Environment

VSCode is used for development and debugging. Node.js is an open-source, cross-platform, JavaScript runtime environment. It executes JavaScript code outside of a browser, whereas VSCode is used to get a typical experience of IDE for developers.


To make a Crypto boy you need to install truffle, Ganache CLI, npm, Metamask. Truffle framework is used as a testing framework and asset pipeline for blockchains using the Ethereum Virtual Machine (EVM). Ganache-CLI is the latest version of TestRPC and a fast and customizable blockchain emulator. npm is the default package manager for the JavaScript runtime environment Node.js. MetaMask is a software cryptocurrency wallet used to interact with the Ethereum blockchain.

Installation Guide

⬇️Download, extract and double-click kit_installer file to install the kit. Note: Do ensure to extract the zip file before running it.

Kit Deployment Instructions

PREREQURIMENT: 1. ⬇️Download the metamask extension in the chrome. Metamask Extension for chrome . 2. ⬇️Download Ganache for your windows. Click here to download Ganache. Follow the below instructions to deploy and run the solution: 1. Download the kit_installer it is in zip format then unzip the folder. 2. Then Double-tap the unzip folder and the command prompt open. After successful installation of the kit, press 'Y' to run the kit and it automatically it opened in your browser at http://localhost:3000. 3. To run the kit manually, press 'N' and locate the zip file 'cryptoboys-nft-marketplace ' and unzip the 'cryptoboys-nft-marketplace' folder then find cryptoboybatch batch folder, and double-tap the folder. 4. The command prompt opens and executes automatically the following commands npm install, npm install -g truffle, npm i ganache-cli, truffle compile, truffle migrate, npm start then the command prompt close automatically. 5. Finally the localhost:3000 opens in the chrome. 6. Before running this project open the Ganache and link with the Metamask extension in chrome. 7. On that page it asks to connect Metamask.


If you need help to use this kit, you can email us at or direct message us on Twitter Message Message @OpenWeaverInc.