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// Copyright 2019 Stichting Organism
//
// Licensed 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.
//
// MIT License
//
// Copyright (c) 2018 Chain, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

/// Trampoline for challange derivation
pub mod transcript;
/// The bullet.
pub(crate) mod inner_product_proof;
/// Inner types
pub(crate) mod util;
/// Generators
pub(crate) mod generators;
pub use generators::{ BulletproofGens, BulletproofGensShare};
/// Pederson Commitmemt & Generator
mod pedersen;
pub use pedersen::PedersenGens;
/// I am bellow and above what i claim
pub mod range_proof;
pub use range_proof::RangeProof;

/// 512 byte hash
pub fn hash512(data: &[u8]) -> [u8; 64] {
    let mut t = bacteria::Transcript::new(b"H512");
    t.append_message(b"input", data);

    let mut result = [0u8; 64];
    t.challenge_bytes(b"result", &mut result);
    result
}

/// Mohan varient of hash to Point
pub fn hash_to_ristretto(input: &[u8]) -> mohan::dalek::ristretto::RistrettoPoint {
    mohan::dalek::ristretto::RistrettoPoint::from_uniform_bytes(&hash512(input))
}