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timestamp.rs
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timestamp.rs
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// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkOS library.
// 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.
use crate::MAX_TIMESTAMP_DELTA_IN_SECS;
use snarkvm::prelude::{bail, Result};
use time::OffsetDateTime;
/// Returns the current UTC epoch timestamp.
pub fn now() -> i64 {
OffsetDateTime::now_utc().unix_timestamp()
}
/// Sanity checks the timestamp for liveness.
pub fn check_timestamp_for_liveness(timestamp: i64) -> Result<()> {
// Ensure the timestamp is within range.
if timestamp > (now() + MAX_TIMESTAMP_DELTA_IN_SECS) {
bail!("Timestamp {timestamp} is too far in the future")
}
Ok(())
}
#[cfg(test)]
mod prop_tests {
use super::*;
use crate::MAX_TIMESTAMP_DELTA_IN_SECS;
use proptest::prelude::*;
use test_strategy::proptest;
fn any_valid_timestamp() -> BoxedStrategy<i64> {
(Just(now()), 0..MAX_TIMESTAMP_DELTA_IN_SECS).prop_map(|(now, delta)| now + delta).boxed()
}
fn any_invalid_timestamp() -> BoxedStrategy<i64> {
(Just(now()), MAX_TIMESTAMP_DELTA_IN_SECS..).prop_map(|(now, delta)| now + delta).boxed()
}
#[proptest]
fn test_check_timestamp_for_liveness(#[strategy(any_valid_timestamp())] timestamp: i64) {
check_timestamp_for_liveness(timestamp).unwrap();
}
#[proptest]
fn test_check_timestamp_for_liveness_too_far_in_future(#[strategy(any_invalid_timestamp())] timestamp: i64) {
assert!(check_timestamp_for_liveness(timestamp).is_err());
}
}