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.create(self.mempool_size)
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)}, minimum fee to get in: {self.mempool.get_min_fee_rate()}"
)
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
tx_per_sec = self.constants.TX_PER_SEC
sec_per_block = self.constants.SUB_SLOT_TIME_TARGET // self.constants.SLOT_BLOCKS_TARGET
block_buffer_count = self.constants.MEMPOOL_BLOCK_BUFFER
# MEMPOOL_SIZE = 60000
self.mempool_size = int(tx_per_sec * sec_per_block * block_buffer_count)
self.potential_cache_size = 300
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.create(self.mempool_size)