Spotting issues in DeFi with dimensional analysis

Dimensional analysis is a technique from physics that can help developers spot arithmetic and logic bugs in DeFi (decentralized finance, financial applications built on blockchain) smart contracts (self-executing programs on blockchain) by checking whether formulas are dimensionally consistent. The method works by treating DeFi concepts like tokens and liquidity as 'dimensions' (similar to how physics treats meters and seconds), and checking that both sides of an equation have matching dimensions, just as you cannot add distance and time together.