async def _skip_complete_headers_iterator(
headers: Iterable[BlockHeader], logger: ExtendedDebugLogger,
completion_check: Callable[[BlockHeader], Awaitable[bool]]
) -> AsyncIterator[BlockHeader]:
"""
We only want headers that are missing, so we iterate over the list
until we find the first missing header, after which we return all of
the remaining headers.
"""
iter_headers = iter(headers)
# for logging:
first_discarded = None
last_discarded = None
num_discarded = 0
for header in iter_headers:
is_present = await completion_check(header)
if is_present:
if first_discarded is None:
first_discarded = header
else:
last_discarded = header
num_discarded += 1
else:
yield header
break
logger.debug(
"Discarding %d headers that we already have: %s...%s",
num_discarded,
first_discarded,
last_discarded,
)
for header in iter_headers:
yield header
async def _skip_complete_headers_iterator(
headers: Iterable[BlockHeader], logger: ExtendedDebugLogger,
completion_check: Callable[[BlockHeader], Awaitable[bool]]
) -> AsyncIterator[BlockHeader]:
"""
We only want headers that are missing, so we iterate over the list
until we find the first missing header, after which we return all of
the remaining headers.
"""
iter_headers = iter(headers)
for header in iter_headers:
is_present = await completion_check(header)
if is_present:
logger.debug("Discarding header that we already have: %s", header)
else:
yield header
break
for header in iter_headers:
yield header