CryptoVision Token Sale

A decentralized token sale dApp where users can buy CVT (CryptoVision) tokens with ETH.

Overview

• Token: CryptoVision (CVT), ERC-20, 11,000,000 total supply
• Sale: 1,000,000 CVT available at 0.0001 ETH per token (10,000 CVT / ETH)
• Network: Ethereum Sepolia Testnet

Contracts (Sepolia)

Contract	Address
CryptoVisionToken	0x7475826c17026e4F758Ba7Ff7dF72b5Ddb4fc158
CryptoVisionSale	0x2e45775c7c359501063371aD1343474722FdE20a

Tech Stack

Contracts

• Solidity 0.8.30
• OpenZeppelin v5 (ERC-20, Ownable2Step, ReentrancyGuard, SafeERC20)
• Foundry (forge, cast, anvil)

Frontend

• React + Vite + TypeScript
• wagmi v2 + viem
• RainbowKit
• Tailwind CSS

Project Structure

CryptoVision/
├── contracts/
│   ├── src/
│   │   ├── CryptoVisionToken.sol
│   │   └── CryptoVisionSale.sol
│   ├── test/
│   │   └── CryptoVisionSale.t.sol
│   └── script/
│       └── Deploy.s.sol
└── frontend/
    └── src/
        ├── components/
        ├── hooks/
        ├── config/
        └── abi/

Getting Started

Contracts

cd contracts
forge install
forge build
forge test

Deploy to Sepolia:

forge script script/Deploy.s.sol --rpc-url sepolia --account <keystore> --broadcast

Frontend

cd frontend
npm install
npm run dev

Security

• Checks-Effects-Interactions pattern on all state-changing functions
• ReentrancyGuard on ETH-receiving functions
• Ownable2Step for safe ownership transfers
• Custom errors for gas efficiency