Learn SOLIDITY with Real Code Examples

Minimize storage writes

Use events instead of storing historical data

Use immutable/constant variables

Avoid loops over dynamic arrays

Use efficient data structures

Prevent reentrancy with checks-effects-interactions or ReentrancyGuard

Validate user inputs

Use SafeERC20 for token transfers

Implement circuit breakers

Use OpenZeppelin audited libraries

Tenderly

Etherscan Gas Profiler

Hardhat traces

Block explorers

Event logs & dashboards

Use linters (solhint)

Follow OpenZeppelin standards

Avoid repeated logic

Document storage layouts

Audit code regularly