library/std/src/sys/random/wasi.rs

#[cfg(target_env = "p2")]
use wasip2::random::{insecure_seed::insecure_seed as get_insecure_seed, random::get_random_bytes};
#[cfg(target_env = "p3")]
use wasip3::random::{insecure_seed::get_insecure_seed, random::get_random_bytes};

pub fn fill_bytes(bytes: &mut [u8]) {
    bytes.copy_from_slice(&get_random_bytes(u64::try_from(bytes.len()).unwrap()));
}

pub fn hashmap_random_keys() -> (u64, u64) {
    get_insecure_seed()
}