A comprehensive collection of blockchain projects demonstrating expertise in Ethereum, Smart Contracts, NFTs, DeFi protocols, and Web3 development. This repository showcases implementations using industry-standard tools including Truffle, Hardhat, Solidity, and modern web frameworks.
This repository contains 19 progressive projects covering:
- Token Standards: ERC20, ERC721, ERC721A, ERC1155, ERC6551
- DeFi Mechanisms: Staking, Token Fractions, Upgradeable Contracts
- NFT Technologies: Metadata generation, Whitelist mechanisms, OpenSea integration
- Account Abstraction: Modern wallet solutions and smart account implementations
- Security: ECDSA signatures, Merkle Tree whitelists, Delegate deployment patterns
- Smart Contracts: Solidity, OpenZeppelin
- Development Frameworks: Hardhat, Truffle
- Frontend: Next.js, React, TypeScript, TailwindCSS
- Web3 Libraries: ethers.js, web3.js
- Testing: Mocha, Chai, Hardhat Test Environment
- Deployment: Infura, Etherscan verification
- Tools: TypeScript, dotenv, Merkle Trees, ECDSA
Description: Basic ERC20 fungible token implementation using Truffle framework.
Features:
- Custom ERC20 token (ShanCoin)
- Standard transfer, approve, and allowance functions
- Truffle deployment and migration scripts
Tech Stack: Solidity, Truffle, JavaScript
Description: ERC20 token implementation using Hardhat with TypeScript support.
Features:
- Modern Hardhat development environment
- TypeScript configuration
- Comprehensive test suite
- Deployment scripts
Tech Stack: Solidity, Hardhat, TypeScript
Description: Non-fungible token implementations with basic and URI-based approaches.
Features:
- BasicNFT contract
- URI-based NFT with metadata
- NFT generation scripts
- Multiple deployment strategies
Tech Stack: Solidity, Truffle, JavaScript
Description: Secure NFT deployment using environment variables for sensitive data.
Features:
- Dotenv integration for secrets management
- Infura provider configuration
- Secure private key handling
Tech Stack: Solidity, Truffle, dotenv
Description: Modern NFT implementation with Hardhat and TypeScript.
Features:
- NewNFT contract implementation
- TypeScript deployment and generation scripts
- Automated testing suite
Tech Stack: Solidity, Hardhat, TypeScript
📁 02_ERC721_Token_Hardhat_Verify_Etherscan
Description: NFT contract with automated Etherscan verification.
Features:
- Contract verification on Etherscan
- Hardhat Etherscan plugin integration
- Public source code transparency
Tech Stack: Solidity, Hardhat, TypeScript, Etherscan API
📁 02_ERC721_Token_Verify_Etherscan
Description: Truffle-based NFT with Etherscan contract verification.
Features:
- DemoNFT contract
- Truffle plugin for verification
- Testnet deployment examples
Tech Stack: Solidity, Truffle, Etherscan API
Description: Complete NFT project with dynamic metadata generation.
Features:
- ShapeNFT contract
- Metadata creation scripts
- Batch and single NFT minting
- Data retrieval utilities
Tech Stack: Solidity, Hardhat, TypeScript
Description: Multi-token standard supporting both fungible and non-fungible tokens.
Features:
- ERC1155 implementation
- Multiple token types in single contract
- Batch transfer capabilities
- Metadata management
Tech Stack: Solidity, Hardhat, TypeScript
Description: Fractional ownership of NFTs using ERC1155.
Features:
- NFT fractionalization
- Partial ownership transfers
- Combined fungible/non-fungible token management
Tech Stack: Solidity, Hardhat, TypeScript
Description: Gas-optimized NFT implementation using ERC721A standard.
Features:
- Batch minting optimization
- Reduced gas costs for multiple NFT mints
- ERC721A implementation
- Advanced scripting utilities
Tech Stack: Solidity, Hardhat, TypeScript, ERC721A
Description: Token staking mechanism with rewards system.
Features:
- Custom staking token (SToken)
- Staking contract with deposit/withdraw
- Reward calculation mechanisms
- Hardhat tasks for interaction
Tech Stack: Solidity, Hardhat, TypeScript
Description: Signature-based whitelist implementation using ECDSA.
Features:
- Off-chain signature generation
- On-chain signature verification
- Gas-efficient whitelist mechanism
- Secure access control
Tech Stack: Solidity, Hardhat, TypeScript, ECDSA
📁 12_ERC721_MerkleTrees_Whitelist
Description: NFT minting with Merkle Tree-based whitelist verification.
Features:
- Merkle Tree whitelist generation
- Gas-efficient proof verification
- Private whitelist management
- Secure presale mechanisms
Tech Stack: Solidity, Hardhat, TypeScript, Merkle Trees
Description: Advanced contract deployment using delegate patterns.
Features:
- Proxy pattern implementations
- Delegate call mechanisms
- Contract factory patterns
- Multiple deployment strategies
Tech Stack: Solidity, Hardhat, TypeScript
Description: Proxy-based upgradeable smart contract patterns.
Features:
- OpenZeppelin upgradeable contracts
- Transparent proxy pattern
- Contract upgrade scripts
- State preservation across upgrades
Tech Stack: Solidity, Hardhat, TypeScript, OpenZeppelin Upgrades
Description: Enhanced upgradeable contract implementations.
Features:
- Advanced proxy patterns
- UUPS (Universal Upgradeable Proxy Standard)
- Improved upgrade mechanisms
Tech Stack: Solidity, Hardhat, TypeScript, OpenZeppelin
Description: NFT contracts with OpenSea operator filtering for royalty protection.
Features:
- OpenSea operator filter registry integration
- Royalty enforcement mechanisms
- Marketplace transfer restrictions
- Creator earnings protection
Tech Stack: Solidity, Hardhat, TypeScript, OpenSea Standards
📁 14_baisc_account_abstraction
Description: Introduction to account abstraction (ERC-4337) concepts.
Features:
- Smart account basics
- UserOperation handling
- Bundler integration
- Paymaster patterns
Tech Stack: JavaScript, ethers.js, Account Abstraction SDK
Description: Web interface for account abstraction features.
Features:
- Next.js frontend application
- Smart account interaction UI
- Gasless transaction demos
- Modern wallet experience
Tech Stack: Next.js, TypeScript, TailwindCSS, Account Abstraction
Description: Complete toolkit for building account abstraction applications.
Features:
- Full-featured AA implementation
- Reusable components and utilities
- Advanced smart account features
- Production-ready architecture
Tech Stack: Next.js, TypeScript, TailwindCSS, Web3 SDKs
Description: Implementation of ERC6551 standard for NFT-owned accounts.
Features:
- Token bound account contracts
- NFT as account owner
- Asset ownership by NFTs
- Registry implementation
Tech Stack: Solidity, Hardhat, TypeScript, ERC6551
Description: Advanced ERC6551 implementation with SDK integration.
Features:
- Complete ERC6551 SDK usage
- Comprehensive script library (24+ scripts)
- Token bound account management
- Advanced interaction patterns
Tech Stack: Solidity, Hardhat, TypeScript, ERC6551 SDK
Description: Full-stack web application for ERC6551 token bound accounts.
Features:
- Next.js frontend for TBA interaction
- NFT portfolio management
- Asset transfer UI for NFT accounts
- Modern Web3 user experience
Tech Stack: Next.js, TypeScript, TailwindCSS, ERC6551
- Node.js (v14 or higher)
- npm or yarn
- MetaMask or similar Web3 wallet
- Infura account (for deployment)
- Clone the repository
git clone <repository-url>
cd defi-projects- Navigate to a specific project
cd 01_ERC20_Token- Install dependencies
npm install- Set up environment variables
cp .env.example .env
# Edit .env with your configuration# Compile contracts
npx hardhat compile
# Run tests
npx hardhat test
# Deploy to local network
npx hardhat run scripts/deploy.ts
# Deploy to testnet
npx hardhat run scripts/deploy.ts --network sepolia# Compile contracts
truffle compile
# Run tests
truffle test
# Deploy to local network
truffle migrate
# Deploy to testnet
truffle migrate --network sepolia# Development server
npm run dev
# Build for production
npm run build
# Start production server
npm start- Project Guidelines: Panacloud DeFi DApps
- Solidity Documentation: https://docs.soliditylang.org
- Hardhat: https://hardhat.org
- OpenZeppelin: https://docs.openzeppelin.com
- Ethers.js: https://docs.ethers.io
Each project may have its own license. Please check individual project directories for specific licensing information.
This is a learning portfolio repository. Feel free to explore, learn, and use as reference for your own projects.
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