Add high fee transactions immediately

src/block_template.cpp

@@ -260,7 +260,7 @@ void BlockTemplate::update(const MinerData& data, const Mempool& mempool, Wallet
 
 	m_sidechain->fill_sidechain_data(*m_poolBlockTemplate, miner_wallet, m_txkeySec, m_shares);
 
-	// Only choose transactions that were received 10 or more seconds ago
+	// Only choose transactions that were received 10 or more seconds ago, or high fee (>= 0.006 XMR) transactions
 	size_t total_mempool_transactions;
 	{
 		m_mempoolTxs.clear();
@@ -272,7 +272,7 @@ void BlockTemplate::update(const MinerData& data, const Mempool& mempool, Wallet
 		const uint64_t cur_time = seconds_since_epoch();
 
 		for (auto& it : mempool.m_transactions) {
-			if (cur_time >= it.second.time_received + 10) {
+			if ((cur_time >= it.second.time_received + 10) || (it.second.fee >= HIGH_FEE_VALUE)) {
 				m_mempoolTxs.emplace_back(it.second);
 			}
 		}

src/mempool.h

@@ -21,6 +21,8 @@
 
 namespace p2pool {
 
+constexpr uint64_t HIGH_FEE_VALUE = 6000000000ULL;
+
 class p2pool;
 
 class Mempool : public nocopy_nomove

src/p2pool.cpp

@@ -244,6 +244,11 @@ void p2pool::handle_tx(TxMempoolData& tx)
 		", weight = " << log::Gray() << tx.weight << log::NoColor() <<
 		", fee = " << log::Gray() << static_cast<double>(tx.fee) / 1e6 << " um");
 
+	if (tx.fee >= HIGH_FEE_VALUE) {
+		LOGINFO(4, "high fee tx received: " << log::LightBlue() << tx.id << log::NoColor() << ", " << log::XMRAmount(tx.fee) << " - updating block template");
+		update_block_template_async();
+	}
+
 #if TEST_MEMPOOL_PICKING_ALGORITHM
 	m_blockTemplate->update(miner_data(), *m_mempool, &m_params->m_wallet);
 #endif