async def preview_transactions(self,
header: BlockHeader,
transactions: Tuple[BaseTransaction, ...],
parent_state_root: Hash32,
lagging: bool = True) -> None:
self.run_task(
self._preview_address_load(header, parent_state_root,
transactions))
# This is a hack, so that preview executions can load ancestor block-hashes
self._db[header.hash] = rlp.encode(header)
# Always broadcast, to start previewing transactions that are further ahead in the block
old_state_header = header.copy(state_root=parent_state_root)
self._event_bus.broadcast_nowait(
DoStatelessBlockPreview(old_state_header, transactions))
async def preview_transactions(self,
header: BlockHeader,
transactions: Tuple[BaseTransaction, ...],
parent_state_root: Hash32,
lagging: bool = True) -> None:
if not self.manager.is_running:
# If the service is shutting down, we can ignore preview requests
return
self.manager.run_task(self._preview_address_load, header,
parent_state_root, transactions)
# This is a hack, so that preview executions can load ancestor block-hashes
self._db[header.hash] = rlp.encode(header)
# Always broadcast, to start previewing transactions that are further ahead in the block
old_state_header = header.copy(state_root=parent_state_root)
self._event_bus.broadcast_nowait(
DoStatelessBlockPreview(old_state_header, transactions),
FIRE_AND_FORGET_BROADCASTING)
self._backfiller.set_root_hash(parent_state_root)