Crate sp_arithmetic

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.

Macros

assert_eq_error_rate

Copied from sp-runtime and documented there.

Structs

Fixed64	A fixed point number representation in the range.
Fixed128	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.

Traits

FixedPointNumber	Something that implements a decimal fixed point number.
PerThing	Something that implements a fixed point ration with an arbitrary granularity X, as parts per X.