From ccf53a566c1c2e980ed30a7371b8789ffb4c01a7 Mon Sep 17 00:00:00 2001 From: moneromooo-monero Date: Fri, 22 Sep 2017 13:57:20 +0100 Subject: track double spending in the txpool Transactions in the txpool are marked when another transaction is seen double spending one or more of its inputs. This is then exposed wherever appropriate. Note that being marked with this "double spend seen" flag does NOT mean this transaction IS a double spend and will never be mined: it just means that the network has seen at least another transaction spending at least one of the same inputs, so care should be taken to wait for a few confirmations before acting upon that transaction (ie, mostly of use for merchants wanting to accept unconfirmed transactions). --- src/cryptonote_core/blockchain.cpp | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'src/cryptonote_core/blockchain.cpp') diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index 9d89c6280..0296b4908 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -3166,9 +3166,9 @@ bool Blockchain::flush_txes_from_pool(const std::list &txids) cryptonote::transaction tx; size_t blob_size; uint64_t fee; - bool relayed, do_not_relay; + bool relayed, do_not_relay, double_spend_seen; MINFO("Removing txid " << txid << " from the pool"); - if(m_tx_pool.have_tx(txid) && !m_tx_pool.take_tx(txid, tx, blob_size, fee, relayed, do_not_relay)) + if(m_tx_pool.have_tx(txid) && !m_tx_pool.take_tx(txid, tx, blob_size, fee, relayed, do_not_relay, double_spend_seen)) { MERROR("Failed to remove txid " << txid << " from the pool"); res = false; @@ -3351,7 +3351,7 @@ leave: transaction tx; size_t blob_size = 0; uint64_t fee = 0; - bool relayed = false, do_not_relay = false; + bool relayed = false, do_not_relay = false, double_spend_seen = false; TIME_MEASURE_START(aa); // XXX old code does not check whether tx exists @@ -3368,7 +3368,7 @@ leave: TIME_MEASURE_START(bb); // get transaction with hash from tx_pool - if(!m_tx_pool.take_tx(tx_id, tx, blob_size, fee, relayed, do_not_relay)) + if(!m_tx_pool.take_tx(tx_id, tx, blob_size, fee, relayed, do_not_relay, double_spend_seen)) { MERROR_VER("Block with id: " << id << " has at least one unknown transaction with id: " << tx_id); bvc.m_verifivation_failed = true; @@ -4381,12 +4381,12 @@ void Blockchain::load_compiled_in_block_hashes() size_t blob_size; uint64_t fee; - bool relayed, do_not_relay; + bool relayed, do_not_relay, double_spend_seen; transaction pool_tx; for(const transaction &tx : txs) { crypto::hash tx_hash = get_transaction_hash(tx); - m_tx_pool.take_tx(tx_hash, pool_tx, blob_size, fee, relayed, do_not_relay); + m_tx_pool.take_tx(tx_hash, pool_tx, blob_size, fee, relayed, do_not_relay, double_spend_seen); } } } -- cgit v1.2.3