tari_template_lib 0.19.1

Tari template library provides abstrations that interface with the Tari validator engine
Documentation 
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//  Copyright 2022 The Tari Project
//  SPDX-License-Identifier: BSD-3-Clause

//! Utilities to get random values inside templates

use tari_template_abi::{EngineOp, call_engine, rust::prelude::*};

use crate::args::{GenerateRandomAction, GenerateRandomInvokeArg, InvokeResult};

/// Returns a `Vec` of size `len` with random bytes as items
pub fn random_bytes(len: u32) -> Vec<u8> {
    let resp: InvokeResult = call_engine(EngineOp::GenerateRandomInvoke, &GenerateRandomInvokeArg {
        action: GenerateRandomAction::GetRandomBytes { len },
    });
    resp.decode().expect("Failed to decode random bytes")
}

/// Returns a `u32` representing a random value
pub fn random_u32() -> u32 {
    let v = random_bytes(4);
    u32::from_le_bytes(v.as_slice().try_into().unwrap())
}