UInt256

A 256-bit unsigned integer backed by two UInt128 limbs, conforming to FixedWidthInteger, BinaryInteger, and UnsignedInteger; used for 256-bit field arithmetic on the secp256k1 curve.

iOS 18.0+
macCatalyst 18.0+
macOS 15.0+
tvOS 18.0+
visionOS 2.0+
watchOS 11.0+

@frozen struct UInt256

Topics

Initializers

init()
init(bitPattern: Int256)

Instance Methods

func addMod(UInt256, modulus: UInt256) -> UInt256
Returns (self + other) % modulus.
func mulMod(UInt256, modulus: UInt256) -> UInt256
Returns (self * other) % modulus.