// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License..

use std::vec::Vec;

pub fn hex_to_bytes(hex_string: &str) -> Vec<u8> {
    let input_chars: Vec<_> = hex_string.chars().collect();

    input_chars
        .chunks(2)
        .map(|chunk| {
            let first_byte = chunk[0].to_digit(16).unwrap();
            let second_byte = chunk[1].to_digit(16).unwrap();
            ((first_byte << 4) | second_byte) as u8
        })
        .collect()
}