Reference General Learnging Resource Solidity by Example Getting Started with Solidity Crypto Zombie Appworks School Blockchain Program Resource Design Patterns Resource Solidity Patterns dragonfly-xyz/useful-solidity-patterns harendra-shakya/smart-contract-attack-vectors harendra-shakya/solidity-gas-optimization DeFi smartcontractkit/defi-minimal harendra-shakya/uniswap-unwrapped Vulnerability Resource Ethernaut Damn Vulnerable DeFi DeFiHack Hack Solidity DeFi Security Lecture DeFiHackLabs