decimal

package

v0.0.8 Latest Latest Go to latest Published: Oct 30, 2026 License: AGPL-3.0 Imports: 4 Imported by: 0

Details

Package decimal validates exact decimal strings. Financial values are never converted through float64.

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func Canonical(s string) (string, error)

Canonical normalizes a non-negative plain decimal ("0.0100" -> "0.01"). Signs, exponents, and blanks are rejected.

func Decimals(s string) int

Decimals returns the number of fractional digits of a canonical decimal.

func IsCanonical(s string) bool

IsCanonical reports whether s is canonical (no leading/trailing zeros).

func IsZero(s string) bool

IsZero reports whether a canonical decimal is zero.

func Rat(s string) (*big.Rat, bool)

Rat parses a canonical decimal exactly.

func SigFigs(s string) int

SigFigs returns significant digits of a canonical decimal.

func ValidatePerpPrice(px string, szDecimals int) error

ValidatePerpPrice applies Hyperliquid perp price rules: at most 5 significant figures unless integral, and at most 6-szDecimals decimals.

func ValidateSize(sz string, szDecimals int) error

ValidateSize checks size precision against szDecimals.

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