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| Original file line number | Diff line number | Diff line change |
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| // This file is part of Acala. | ||
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| // Copyright (C) 2020-2021 Acala Foundation. | ||
| // SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 | ||
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| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
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| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
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| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
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| use codec::{Decode, Encode}; | ||
| use sp_runtime::{ | ||
| traits::{Lazy, Verify}, | ||
| AccountId32, MultiSigner, RuntimeDebug, | ||
| }; | ||
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| use sp_core::{crypto::Public, ecdsa, ed25519, sr25519}; | ||
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| use sp_std::{convert::TryFrom, prelude::*}; | ||
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| #[derive(Eq, PartialEq, Clone, Encode, Decode, RuntimeDebug)] | ||
| pub enum AcalaMultiSignature { | ||
| /// An Ed25519 signature. | ||
| Ed25519(ed25519::Signature), | ||
| /// An Sr25519 signature. | ||
| Sr25519(sr25519::Signature), | ||
| /// An ECDSA/SECP256k1 signature. | ||
| Ecdsa(ecdsa::Signature), | ||
| // An Ethereum compatible SECP256k1 signature. | ||
| Ethereum([u8; 65]), | ||
| // An Ethereum SECP256k1 signature using Eip712 for message encoding. | ||
| AcalaEip712([u8; 65]), | ||
| } | ||
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| impl From<ed25519::Signature> for AcalaMultiSignature { | ||
| fn from(x: ed25519::Signature) -> Self { | ||
| Self::Ed25519(x) | ||
| } | ||
| } | ||
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| impl TryFrom<AcalaMultiSignature> for ed25519::Signature { | ||
| type Error = (); | ||
| fn try_from(m: AcalaMultiSignature) -> Result<Self, Self::Error> { | ||
| if let AcalaMultiSignature::Ed25519(x) = m { | ||
| Ok(x) | ||
| } else { | ||
| Err(()) | ||
| } | ||
| } | ||
| } | ||
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| impl From<sr25519::Signature> for AcalaMultiSignature { | ||
| fn from(x: sr25519::Signature) -> Self { | ||
| Self::Sr25519(x) | ||
| } | ||
| } | ||
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| impl TryFrom<AcalaMultiSignature> for sr25519::Signature { | ||
| type Error = (); | ||
| fn try_from(m: AcalaMultiSignature) -> Result<Self, Self::Error> { | ||
| if let AcalaMultiSignature::Sr25519(x) = m { | ||
| Ok(x) | ||
| } else { | ||
| Err(()) | ||
| } | ||
| } | ||
| } | ||
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| impl From<ecdsa::Signature> for AcalaMultiSignature { | ||
| fn from(x: ecdsa::Signature) -> Self { | ||
| Self::Ecdsa(x) | ||
| } | ||
| } | ||
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| impl TryFrom<AcalaMultiSignature> for ecdsa::Signature { | ||
| type Error = (); | ||
| fn try_from(m: AcalaMultiSignature) -> Result<Self, Self::Error> { | ||
| if let AcalaMultiSignature::Ecdsa(x) = m { | ||
| Ok(x) | ||
| } else { | ||
| Err(()) | ||
| } | ||
| } | ||
| } | ||
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| impl Default for AcalaMultiSignature { | ||
| fn default() -> Self { | ||
| Self::Ed25519(Default::default()) | ||
| } | ||
| } | ||
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| impl Verify for AcalaMultiSignature { | ||
| type Signer = MultiSigner; | ||
| fn verify<L: Lazy<[u8]>>(&self, mut msg: L, signer: &AccountId32) -> bool { | ||
| match (self, signer) { | ||
| (Self::Ed25519(ref sig), who) => sig.verify(msg, &ed25519::Public::from_slice(who.as_ref())), | ||
| (Self::Sr25519(ref sig), who) => sig.verify(msg, &sr25519::Public::from_slice(who.as_ref())), | ||
| (Self::Ecdsa(ref sig), who) => { | ||
| let m = sp_io::hashing::blake2_256(msg.get()); | ||
| match sp_io::crypto::secp256k1_ecdsa_recover_compressed(sig.as_ref(), &m) { | ||
| Ok(pubkey) => &sp_io::hashing::blake2_256(pubkey.as_ref()) == <dyn AsRef<[u8; 32]>>::as_ref(who), | ||
| _ => false, | ||
| } | ||
| } | ||
| _ => false, // Arbitrary message verification is not supported | ||
| } | ||
| } | ||
| } |
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