Mixed-decimals math without explicit scaling

Evidence summary #

V3: sqrtPriceX96 (Q64.96 fixed-point) and raw token amounts — decimal normalization is integrator responsibility. V2: Constant-product invariant uses raw token amounts; no cross-decimal arithmetic. No known mixed-decimals exploit in V2 or V3 core. Green.

Detail #

V3's core design deliberately avoids cross-token decimal arithmetic by using fixed-point price representation (sqrtPriceX96). The protocol does not normalize decimals internally — this is documented in the V3 whitepaper as intentional. V2 similarly uses raw token amounts in the constant-product formula without decimal normalization. Integrators are responsible for handling decimal differences.

Sources #

Methodology #

Determine whether shared numerator/denominator arithmetic operates over tokens with different decimals without WAD/RAY normalization or explicit decimal-adjustment.

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