Random number generation

Random number generation in TON smart contracts.

randomInt

fun randomInt(): Int;

Generates a new pseudo-random unsigned 256-bit integer x. The algorithm is as follows: if r is the old value of the random seed considered a 32-byte array (by constructing the big-endian representation of an unsigned 256-bit integer), then its sha512(r) is computed; the first 32 bytes of this hash are stored as the new value r' of the random seed, and the remaining 32 bytes are returned as the next random value x.

random

fun random(from: Int, to: Int): Int;

Generates a new pseudo-random unsigned integer in provided interval: from <= x <= to or from >= x >= to (for negative values).