pezkuwichain
b6d35f6faf
Updated 4763 files with dual copyright: - Parity Technologies (UK) Ltd. - Dijital Kurdistan Tech Institute
96 lines
3.4 KiB
Rust
96 lines
3.4 KiB
Rust
// This file is part of Bizinikiwi.
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// Copyright (C) Parity Technologies (UK) Ltd. and Dijital Kurdistan Tech Institute
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! *Ed-on-BLS12-377* types and host functions.
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use crate::utils;
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use alloc::vec::Vec;
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use ark_ec::CurveConfig;
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use ark_ed_on_bls12_377_ext::CurveHooks;
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use pezsp_runtime_interface::{
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pass_by::{AllocateAndReturnByCodec, PassFatPointerAndRead},
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runtime_interface,
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};
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/// Curve hooks jumping into [`host_calls`] host functions.
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#[derive(Copy, Clone)]
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pub struct HostHooks;
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/// Group configuration.
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pub type EdwardsConfig = ark_ed_on_bls12_377_ext::EdwardsConfig<HostHooks>;
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/// Twisted Edwards form point affine representation.
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pub type EdwardsAffine = ark_ed_on_bls12_377_ext::EdwardsAffine<HostHooks>;
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/// Twisted Edwards form point projective representation.
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pub type EdwardsProjective = ark_ed_on_bls12_377_ext::EdwardsProjective<HostHooks>;
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impl CurveHooks for HostHooks {
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fn msm(
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bases: &[EdwardsAffine],
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scalars: &[<EdwardsConfig as CurveConfig>::ScalarField],
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) -> EdwardsProjective {
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host_calls::ed_on_bls12_377_te_msm(utils::encode(bases), utils::encode(scalars))
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.and_then(|res| utils::decode_proj_te(res))
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.unwrap_or_default()
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}
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fn mul_projective(base: &EdwardsProjective, scalar: &[u64]) -> EdwardsProjective {
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host_calls::ed_on_bls12_377_te_mul_projective(
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utils::encode_proj_te(base),
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utils::encode(scalar),
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)
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.and_then(|res| utils::decode_proj_te(res))
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.unwrap_or_default()
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}
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}
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/// Interfaces for working with *Arkworks* *Ed-on-BLS12-377* elliptic curve
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/// related types from within the runtime.
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///
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/// All types are (de-)serialized through the wrapper types from the `ark-scale` trait,
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/// with `ark_scale::{ArkScale, ArkScaleProjective}`.
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///
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/// `ArkScale`'s `Usage` generic parameter is expected to be set to "not-validated"
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/// and "not-compressed".
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#[runtime_interface]
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pub trait HostCalls {
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/// Twisted Edwards multi scalar multiplication for *Ed-on-BLS12-377*.
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///
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/// - Receives encoded:
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/// - `base`: `ArkScaleProjective<EdwardsProjective>`.
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/// - `scalars`: `ArkScale<Vec<EdwardsConfig::ScalarField>>`.
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/// - Returns encoded: `ArkScaleProjective<EdwardsProjective>`.
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fn ed_on_bls12_377_te_msm(
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bases: PassFatPointerAndRead<Vec<u8>>,
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scalars: PassFatPointerAndRead<Vec<u8>>,
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) -> AllocateAndReturnByCodec<Result<Vec<u8>, ()>> {
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utils::msm_te::<ark_ed_on_bls12_377::EdwardsConfig>(bases, scalars)
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}
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/// Twisted Edwards projective multiplication for *Ed-on-BLS12-377*.
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///
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/// - Receives encoded:
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/// - `base`: `ArkScaleProjective<EdwardsProjective>`.
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/// - `scalar`: `ArkScale<Vec<u64>>`.
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/// - Returns encoded: `ArkScaleProjective<EdwardsProjective>`.
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fn ed_on_bls12_377_te_mul_projective(
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base: PassFatPointerAndRead<Vec<u8>>,
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scalar: PassFatPointerAndRead<Vec<u8>>,
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) -> AllocateAndReturnByCodec<Result<Vec<u8>, ()>> {
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utils::mul_projective_te::<ark_ed_on_bls12_377::EdwardsConfig>(base, scalar)
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}
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}
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