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Reloaded provided transactions from the disk

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Also resolves a race condition by asserting provided transactions must be
unique, allowing them to be safely provided multiple times.
This commit is contained in:
Luke Parker
2023-04-14 15:03:01 -04:00
parent 63318cb728
commit 695d923593
4 changed files with 109 additions and 38 deletions
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28
coordinator/tributary/src/tests/blockchain.rs
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@@ -1,3 +1,5 @@
use std::collections::VecDeque;
use zeroize::Zeroizing;
use rand::{RngCore, rngs::OsRng};
@@ -5,10 +7,10 @@ use blake2::{Digest, Blake2s256};
use ciphersuite::{group::ff::Field, Ciphersuite, Ristretto};
use serai_db::MemDb;
use serai_db::{DbTxn, Db, MemDb};
use crate::{
merkle, Transaction, ProvidedTransactions, Block, Blockchain,
merkle, Transaction, ProvidedError, ProvidedTransactions, Block, Blockchain,
tests::{ProvidedTransaction, SignedTransaction, random_provided_transaction},
};
@@ -173,21 +175,33 @@ fn signed_transaction() {
#[test]
fn provided_transaction() {
let mut blockchain = new_blockchain::<ProvidedTransaction>(new_genesis(), &[]);
let genesis = new_genesis();
let mut blockchain = new_blockchain::<ProvidedTransaction>(genesis, &[]);
let tx = random_provided_transaction(&mut OsRng);
// This should be provideable
let mut txs = ProvidedTransactions::new();
txs.provide(tx.clone());
txs.complete(tx.hash());
let mut db = MemDb::new();
let mut txs = ProvidedTransactions::<_, ProvidedTransaction>::new(db.clone(), genesis);
txs.provide(tx.clone()).unwrap();
assert_eq!(txs.provide(tx.clone()), Err(ProvidedError::AlreadyProvided));
assert_eq!(
ProvidedTransactions::<_, ProvidedTransaction>::new(db.clone(), genesis).transactions,
VecDeque::from([tx.clone()]),
);
let mut txn = db.txn();
txs.complete(&mut txn, tx.hash());
txn.commit();
assert!(ProvidedTransactions::<_, ProvidedTransaction>::new(db.clone(), genesis)
.transactions
.is_empty());
// Non-provided transactions should fail verification
let block = Block::new(blockchain.tip(), vec![tx.clone()], vec![]);
assert!(blockchain.verify_block(&block).is_err());
// Provided transactions should pass verification
blockchain.provide_transaction(tx.clone());
blockchain.provide_transaction(tx.clone()).unwrap();
blockchain.verify_block(&block).unwrap();
// add_block should work for verified blocks