RoundingMode

type RoundingMode = "ceil" | "floor" | "round" | "strict" | "trunc";

Rounding mode used by fixed-point operations that must coerce an exact mathematical result into a value with fewer bits of precision. Applies to factories that accept lossy inputs, as well as to downscaling rescales and divisions.

• 'floor' rounds toward negative infinity.
• 'ceil' rounds toward positive infinity.
• 'trunc' rounds toward zero, discarding the fractional part.
• 'round' rounds to the nearest representable value, with ties rounded away from zero. That is, 0.5 rounds to 1, -0.5 rounds to -1, and -1.5 rounds to -2. This is symmetric around zero and differs from JavaScript's Math.round, which breaks ties toward positive infinity.
• 'strict' rejects any input that would require rounding and throws SOLANA_ERROR__FIXED_POINTS__STRICT_MODE_PRECISION_LOSS instead of coercing the result.