Type Alias Rational

Rational: number | string | [number | bigint, number | bigint]

An exact non-negative rational, the way the chain stores prices and thresholds (tag 30).

a decimal number or string: 0.0577, "0.0577", "7.21e-5", read as written and converted to lowest terms
a fraction string: "577/10000"
a [numerator, denominator] pair