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Merklize PoH TX mixin hash (#4644)

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This commit is contained in:
Trent Nelson
2019-06-25 14:44:27 -06:00
committed by GitHub
parent c5e6ebb496
commit f20ba423ca
3 changed files with 14 additions and 8 deletions
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20
core/src/entry.rs
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@ -10,8 +10,9 @@ use chrono::prelude::Utc;
use rayon::prelude::*;
use rayon::ThreadPool;
use solana_budget_api::budget_instruction;
use solana_merkle_tree::MerkleTree;
use solana_metrics::inc_new_counter_warn;
use solana_sdk::hash::{Hash, Hasher};
use solana_sdk::hash::Hash;
use solana_sdk::signature::{Keypair, KeypairUtil};
use solana_sdk::transaction::Transaction;
use std::borrow::Borrow;
@ -172,13 +173,16 @@ impl Entry {
pub fn hash_transactions(transactions: &[Transaction]) -> Hash {
// a hash of a slice of transactions only needs to hash the signatures
let mut hasher = Hasher::default();
transactions.iter().for_each(|tx| {
if !tx.signatures.is_empty() {
hasher.hash(&tx.signatures[0].as_ref());
}
});
hasher.result()
let signatures: Vec<_> = transactions
.iter()
.flat_map(|tx| tx.signatures.iter().map(|sig| sig.as_ref()))
.collect();
let merkle_tree = MerkleTree::new(&signatures);
if let Some(root_hash) = merkle_tree.get_root() {
*root_hash
} else {
Hash::default()
}
}
/// Creates the hash `num_hashes` after `start_hash`. If the transaction contains