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0d06561a91
* replace all stdlib RwLock with parking_lot RwLock * replace stdlib Mutex with parking_lot Mutex * rustfmt
40 lines
1.4 KiB
Rust
40 lines
1.4 KiB
Rust
// Copyright 2018 The Grin Developers
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//
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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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//! Globally accessible static instance of secp256k1, to avoid
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//! initialization overhead
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use rand::thread_rng;
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use secp;
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use std::sync::Arc;
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use Mutex;
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lazy_static! {
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/// Static reference to secp instance
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pub static ref SECP256K1:Arc<Mutex<secp::Secp256k1>>
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= Arc::new(Mutex::new(secp::Secp256k1::with_caps(secp::ContextFlag::Commit)));
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}
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/// Returns the static instance, but calls randomize on it as well
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/// (Recommended to avoid side channel attacks
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pub fn static_secp_instance() -> Arc<Mutex<secp::Secp256k1>> {
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let mut secp_inst = SECP256K1.lock();
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secp_inst.randomize(&mut thread_rng());
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SECP256K1.clone()
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}
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/// Convenient way to generate a commitment to zero.
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pub fn commit_to_zero_value() -> secp::pedersen::Commitment {
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secp::pedersen::Commitment::from_vec(vec![0])
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}
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