async def handle_get_block_headers(self, peer: ETHProxyPeer,
msg: Dict[str, Any]) -> None:
query = cast(Dict[Any, Union[bool, int]], msg)
self.logger.debug("%s requested headers: %s", peer, query)
request = ETHHeaderRequest(
cast(BlockIdentifier, query['block_number_or_hash']),
query['max_headers'],
query['skip'],
cast(bool, query['reverse']),
)
headers = await self.lookup_headers(request)
self.logger.debug2("Replying to %s with %d headers", peer,
len(headers))
peer.sub_proto.send_block_headers(headers)
async def request_stuff() -> None:
# Request some stuff from ropsten's block 2440319
# (https://ropsten.etherscan.io/block/2440319), just as a basic test.
nonlocal peer_pool
while not peer_pool.connected_nodes:
peer_pool.logger.info("Waiting for peer connection...")
await asyncio.sleep(0.2)
peer = peer_pool.highest_td_peer
block_hash = decode_hex(
'0x59af08ab31822c992bb3dad92ddb68d820aa4c69e9560f07081fa53f1009b152'
)
if peer_class == ETHPeer:
peer = cast(ETHPeer, peer)
peer.sub_proto.send_get_block_headers(
ETHHeaderRequest(block_hash, 1, 0, False))
peer.sub_proto.send_get_block_bodies([block_hash])
peer.sub_proto.send_get_receipts([block_hash])
else:
peer = cast(LESPeer, peer)
request_id = 1
peer.sub_proto.send_get_block_headers(
LESHeaderRequest(block_hash, 1, 0, False, request_id))
peer.sub_proto.send_get_block_bodies([block_hash], request_id + 1)
peer.sub_proto.send_get_receipts(block_hash, request_id + 2)