70 lines
2.2 KiB
Rust
70 lines
2.2 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! A signer used by Engines which need to sign messages.
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use std::sync::Arc;
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use ethereum_types::{H256, Address};
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use ethkey::Signature;
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use account_provider::{self, AccountProvider};
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/// Everything that an Engine needs to sign messages.
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pub struct EngineSigner {
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account_provider: Arc<AccountProvider>,
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address: Option<Address>,
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password: Option<String>,
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}
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impl Default for EngineSigner {
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fn default() -> Self {
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EngineSigner {
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account_provider: Arc::new(AccountProvider::transient_provider()),
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address: Default::default(),
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password: Default::default(),
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}
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}
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}
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impl EngineSigner {
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/// Set up the signer to sign with given address and password.
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pub fn set(&mut self, ap: Arc<AccountProvider>, address: Address, password: String) {
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self.account_provider = ap;
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self.address = Some(address);
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self.password = Some(password);
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debug!(target: "poa", "Setting Engine signer to {}", address);
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}
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/// Sign a consensus message hash.
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pub fn sign(&self, hash: H256) -> Result<Signature, account_provider::SignError> {
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self.account_provider.sign(self.address.unwrap_or_else(Default::default), self.password.clone(), hash)
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}
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/// Signing address.
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pub fn address(&self) -> Option<Address> {
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self.address.clone()
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}
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/// Check if the given address is the signing address.
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pub fn is_address(&self, address: &Address) -> bool {
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self.address.map_or(false, |a| a == *address)
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}
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/// Check if the signing address was set.
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pub fn is_some(&self) -> bool {
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self.address.is_some()
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}
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}
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