async def new_peak(
self, new_peak: Optional[BlockRecord]
) -> List[Tuple[SpendBundle, CostResult, bytes32]]:
"""
Called when a new peak is available, we try to recreate a mempool for the new tip.
"""
if new_peak is None:
return []
if self.peak == new_peak:
return []
if new_peak.height <= self.constants.INITIAL_FREEZE_PERIOD:
return []
self.peak = new_peak
old_pool = self.mempool
self.mempool = Mempool(self.mempool_max_total_cost)
for item in old_pool.spends.values():
await self.add_spendbundle(item.spend_bundle, item.cost_result,
item.spend_bundle_name, False)
potential_txs_copy = self.potential_txs.copy()
self.potential_txs = {}
txs_added = []
for tx, cached_result, cached_name in potential_txs_copy.values():
cost, status, error = await self.add_spendbundle(
tx, cached_result, cached_name)
if status == MempoolInclusionStatus.SUCCESS:
txs_added.append((tx, cached_result, cached_name))
log.debug(
f"Size of mempool: {len(self.mempool.spends)} spends, cost: {self.mempool.total_mempool_cost} "
f"minimum fee to get in: {self.mempool.get_min_fee_rate(100000)}")
return txs_added
def __init__(self, coin_store: CoinStore,
consensus_constants: ConsensusConstants):
self.constants: ConsensusConstants = consensus_constants
self.constants_json = recurse_jsonify(
dataclasses.asdict(self.constants))
# Transactions that were unable to enter mempool, used for retry. (they were invalid)
self.potential_txs: Dict[bytes32, Tuple[SpendBundle, CostResult,
bytes32]] = {}
# Keep track of seen spend_bundles
self.seen_bundle_hashes: Dict[bytes32, bytes32] = {}
self.coin_store = coin_store
self.mempool_max_total_cost = int(self.constants.MAX_BLOCK_COST_CLVM *
self.constants.MEMPOOL_BLOCK_BUFFER)
self.potential_cache_max_total_cost = int(
self.constants.MAX_BLOCK_COST_CLVM *
self.constants.MEMPOOL_BLOCK_BUFFER)
self.potential_cache_cost: int = 0
self.seen_cache_size = 10000
self.pool = ProcessPoolExecutor(max_workers=1)
# The mempool will correspond to a certain peak
self.peak: Optional[BlockRecord] = None
self.mempool: Mempool = Mempool(self.mempool_max_total_cost)
def __init__(self, coin_store: CoinStore,
consensus_constants: ConsensusConstants):
self.constants: ConsensusConstants = consensus_constants
self.constants_json = recurse_jsonify(
dataclasses.asdict(self.constants))
# Keep track of seen spend_bundles
self.seen_bundle_hashes: Dict[bytes32, bytes32] = {}
self.coin_store = coin_store
self.lock = asyncio.Lock()
# The fee per cost must be above this amount to consider the fee "nonzero", and thus able to kick out other
# transactions. This prevents spam. This is equivalent to 0.055 XCH per block, or about 0.00005 XCH for two
# spends.
self.nonzero_fee_minimum_fpc = 5
self.limit_factor = 0.5
self.mempool_max_total_cost = int(self.constants.MAX_BLOCK_COST_CLVM *
self.constants.MEMPOOL_BLOCK_BUFFER)
# Transactions that were unable to enter mempool, used for retry. (they were invalid)
self.potential_cache = PendingTxCache(
self.constants.MAX_BLOCK_COST_CLVM * 1)
self.seen_cache_size = 10000
self.pool = ProcessPoolExecutor(max_workers=2)
# The mempool will correspond to a certain peak
self.peak: Optional[BlockRecord] = None
self.mempool: Mempool = Mempool(self.mempool_max_total_cost)
async def new_peak(
self, new_peak: Optional[BlockRecord], coin_changes: List[CoinRecord]
) -> List[Tuple[SpendBundle, NPCResult, bytes32]]:
"""
Called when a new peak is available, we try to recreate a mempool for the new tip.
"""
if new_peak is None:
return []
if new_peak.is_transaction_block is False:
return []
if self.peak == new_peak:
return []
assert new_peak.timestamp is not None
use_optimization: bool = self.peak is not None and new_peak.prev_transaction_block_hash == self.peak.header_hash
self.peak = new_peak
if use_optimization:
# We don't reinitialize a mempool, just kick removed items
for coin_record in coin_changes:
if coin_record.name in self.mempool.removals:
item = self.mempool.removals[coin_record.name]
self.mempool.remove_from_pool(item)
self.remove_seen(item.spend_bundle_name)
else:
old_pool = self.mempool
self.mempool = Mempool(self.mempool_max_total_cost)
for item in old_pool.spends.values():
_, result, _ = await self.add_spendbundle(
item.spend_bundle, item.npc_result, item.spend_bundle_name,
item.program)
# If the spend bundle was confirmed or conflicting (can no longer be in mempool), it won't be
# successfully added to the new mempool. In this case, remove it from seen, so in the case of a reorg,
# it can be resubmitted
if result != MempoolInclusionStatus.SUCCESS:
self.remove_seen(item.spend_bundle_name)
potential_txs = self.potential_cache.drain()
txs_added = []
for item in potential_txs.values():
cost, status, error = await self.add_spendbundle(
item.spend_bundle,
item.npc_result,
item.spend_bundle_name,
program=item.program)
if status == MempoolInclusionStatus.SUCCESS:
txs_added.append((item.spend_bundle, item.npc_result,
item.spend_bundle_name))
log.info(
f"Size of mempool: {len(self.mempool.spends)} spends, cost: {self.mempool.total_mempool_cost} "
f"minimum fee rate (in FPC) to get in for 5M cost tx: {self.mempool.get_min_fee_rate(5000000)}"
)
return txs_added
async def new_peak(
self, new_peak: Optional[BlockRecord]
) -> List[Tuple[SpendBundle, NPCResult, bytes32]]:
"""
Called when a new peak is available, we try to recreate a mempool for the new tip.
"""
if new_peak is None:
return []
if new_peak.is_transaction_block is False:
return []
if self.peak == new_peak:
return []
assert new_peak.timestamp is not None
if new_peak.timestamp <= self.constants.INITIAL_FREEZE_END_TIMESTAMP:
return []
self.peak = new_peak
old_pool = self.mempool
self.mempool = Mempool(self.mempool_max_total_cost)
for item in old_pool.spends.values():
_, result, _ = await self.add_spendbundle(item.spend_bundle,
item.npc_result,
item.spend_bundle_name,
False, item.program)
# If the spend bundle was confirmed or conflicting (can no longer be in mempool), it won't be successfully
# added to the new mempool. In this case, remove it from seen, so in the case of a reorg, it can be
# resubmitted
if result != MempoolInclusionStatus.SUCCESS:
self.remove_seen(item.spend_bundle_name)
potential_txs_copy = self.potential_txs.copy()
self.potential_txs = {}
txs_added = []
for item in potential_txs_copy.values():
cost, status, error = await self.add_spendbundle(
item.spend_bundle,
item.npc_result,
item.spend_bundle_name,
program=item.program)
if status == MempoolInclusionStatus.SUCCESS:
txs_added.append((item.spend_bundle, item.npc_result,
item.spend_bundle_name))
log.debug(
f"Size of mempool: {len(self.mempool.spends)} spends, cost: {self.mempool.total_mempool_cost} "
f"minimum fee to get in: {self.mempool.get_min_fee_rate(100000)}")
return txs_added
async def new_peak(
self, new_peak: Optional[BlockRecord]
) -> List[Tuple[SpendBundle, NPCResult, bytes32]]:
"""
Called when a new peak is available, we try to recreate a mempool for the new tip.
"""
if new_peak is None:
return []
if new_peak.is_transaction_block is False:
return []
if self.peak == new_peak:
return []
assert new_peak.timestamp is not None
if new_peak.timestamp <= self.constants.INITIAL_FREEZE_END_TIMESTAMP:
return []
self.peak = new_peak
old_pool = self.mempool
self.mempool = Mempool(self.mempool_max_total_cost)
for item in old_pool.spends.values():
await self.add_spendbundle(item.spend_bundle, item.npc_result,
item.spend_bundle_name, False,
item.program)
potential_txs_copy = self.potential_txs.copy()
self.potential_txs = {}
txs_added = []
for item in potential_txs_copy.values():
cost, status, error = await self.add_spendbundle(
item.spend_bundle,
item.npc_result,
item.spend_bundle_name,
program=item.program)
if status == MempoolInclusionStatus.SUCCESS:
txs_added.append((item.spend_bundle, item.npc_result,
item.spend_bundle_name))
log.debug(
f"Size of mempool: {len(self.mempool.spends)} spends, cost: {self.mempool.total_mempool_cost} "
f"minimum fee to get in: {self.mempool.get_min_fee_rate(100000)}")
return txs_added
async def test_basic_mempool(self, two_nodes):
reward_ph = WALLET_A.get_new_puzzlehash()
blocks = bt.get_consecutive_blocks(
3,
guarantee_transaction_block=True,
farmer_reward_puzzle_hash=reward_ph,
pool_reward_puzzle_hash=reward_ph,
)
full_node_1, _, server_1, _ = two_nodes
for block in blocks:
await full_node_1.full_node.respond_block(full_node_protocol.RespondBlock(block))
await time_out_assert(60, node_height_at_least, True, full_node_1, blocks[-1].height)
max_mempool_cost = 40000000 * 5
mempool = Mempool(max_mempool_cost)
assert mempool.get_min_fee_rate(104000) == 0
with pytest.raises(ValueError):
mempool.get_min_fee_rate(max_mempool_cost + 1)
spend_bundle = generate_test_spend_bundle(list(blocks[-1].get_included_reward_coins())[0])
assert spend_bundle is not None