48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
//! The `recorder` module provides an object for generating a Proof of History.
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//! It records Transaction items on behalf of its users.
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use entry::Entry;
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use hash::{hash, Hash};
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use ledger::next_entries_mut;
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use std::time::{Duration, Instant};
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use transaction::Transaction;
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pub struct Recorder {
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last_hash: Hash,
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num_hashes: u64,
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num_ticks: u32,
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}
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impl Recorder {
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pub fn new(last_hash: Hash) -> Self {
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Recorder {
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last_hash,
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num_hashes: 0,
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num_ticks: 0,
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}
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}
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pub fn hash(&mut self) {
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self.last_hash = hash(&self.last_hash);
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self.num_hashes += 1;
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}
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pub fn record(&mut self, transactions: Vec<Transaction>) -> Vec<Entry> {
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next_entries_mut(&mut self.last_hash, &mut self.num_hashes, transactions)
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}
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pub fn tick(&mut self, start_time: Instant, tick_duration: Duration) -> Option<Entry> {
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if start_time.elapsed() > tick_duration * (self.num_ticks + 1) {
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// TODO: don't let this overflow u32
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self.num_ticks += 1;
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Some(Entry::new_mut(
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&mut self.last_hash,
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&mut self.num_hashes,
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vec![],
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))
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} else {
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None
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}
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}
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}
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