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blockchain: enforce 10 block age for spending outputs

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Some custom wallet code apparently ignores this, which causes users
of that code to be fingerprinted
This commit is contained in:
moneromooo-monero 2019-09-04 13:59:36 +00:00
parent 2c171a9b02
commit a444f06e53
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GPG key ID: 686F07454D6CEFC3
5 changed files with 51 additions and 6 deletions
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10
src/cryptonote_core/blockchain.cpp
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@ -2982,6 +2982,9 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
const auto waiter_guard = epee::misc_utils::create_scope_leave_handler([&]() { waiter.wait(&tpool); });
int threads = tpool.get_max_concurrency();
uint64_t max_used_block_height = 0;
if (!pmax_used_block_height)
pmax_used_block_height = &max_used_block_height;
for (const auto& txin : tx.vin)
{
// make sure output being spent is of type txin_to_key, rather than
@ -3048,6 +3051,13 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc,
if (tx.version == 1 && threads > 1)
waiter.wait(&tpool);
// enforce min output age
if (hf_version >= HF_VERSION_ENFORCE_MIN_AGE)
{
CHECK_AND_ASSERT_MES(*pmax_used_block_height + CRYPTONOTE_DEFAULT_TX_SPENDABLE_AGE <= m_db->height(),
false, "Transaction spends at least one output which is too young");
}
if (tx.version == 1)
{
if (threads > 1)