Crate sp_arithmetic[−][src]

Minimal fixed point arithmetic primitives and types for runtime.

Modules

biguint	Infinite precision unsigned integer for substrate runtime.
helpers_128bit	Some helper functions to work with 128bit numbers. Note that the functionality provided here is only sensible to use with 128bit numbers because for smaller sizes, you can always rely on assumptions of a bigger type (u128) being available, or simply create a per-thing and use the multiplication implementation provided there.
traits	Primitive traits for the runtime arithmetic.

Copied from sp-runtime and documented there.

FixedI64	A fixed point number representation in the range.
FixedI128	A fixed point number representation in the range.
FixedU128	A fixed point number representation in the range.
PerU16	A fixed point representation of a number in the range [0, 1].
Perbill	A fixed point representation of a number in the range [0, 1].
Percent	A fixed point representation of a number in the range [0, 1].
Permill	A fixed point representation of a number in the range [0, 1].
Perquintill	A fixed point representation of a number in the range [0, 1].
Rational128	A wrapper for any rational number with a 128 bit numerator and denominator.

FixedPointNumber	Something that implements a decimal fixed point number.
FixedPointOperand	Integer types that can be used to interact with `FixedPointNumber` implementations.
Normalizable	A collection-like object that is made of values of type `T` and can normalize its individual values around a centric point.
PerThing	Something that implements a fixed point ration with an arbitrary granularity `X`, as parts per `X`.
ThresholdOrd	Trait for comparing two numbers with an threshold.

Normalize input so that the sum of all elements reaches targeted_sum.

InnerOf	Get the inner type of a `PerThing`.
UpperOf	Get the upper type of a `PerThing`.