async def make_raw_header(self, b):
pbh = b.get('previousblockhash')
if pbh is None:
pbh = '0' * 64
return b''.join([
pack('<L', b.get('version')),
hex_str_to_hash(pbh),
hex_str_to_hash(b.get('merkleroot')),
pack('<L', self.timestamp_safe(b['time'])),
pack('<L', int(b.get('bits'), 16)),
pack('<L', int(b.get('nonce')))
])
async def _refresh_hashes(self, synchronized_event):
"""Refresh our view of the daemon's mempool."""
while True:
height = self.api.cached_height()
hex_hashes = await self.api.mempool_hashes()
if height != await self.api.height():
continue
hashes = {hex_str_to_hash(hh) for hh in hex_hashes}
async with self.lock:
touched = await self._process_mempool(hashes)
synchronized_event.set()
synchronized_event.clear()
await self.api.on_mempool(touched, height)
await sleep(self.refresh_secs)