async def new_challenge(self,
new_challenge: harvester_protocol.NewChallenge):
"""
The harvester receives a new challenge from the farmer, and looks up the quality
for any proofs of space that are are found in the plots. If proofs are found, a
ChallengeResponse message is sent for each of the proofs found.
"""
challenge_size = len(new_challenge.challenge_hash)
if challenge_size != 32:
raise ValueError(
f"Invalid challenge size {challenge_size}, 32 was expected")
all_responses = []
for filename, prover in self.provers.items():
try:
quality_strings = prover.get_qualities_for_challenge(
new_challenge.challenge_hash)
except RuntimeError:
log.error(
f"Error using prover object on {filename}. Reinitializing prover object."
)
quality_strings = None
try:
self.provers[filename] = DiskProver(filename)
quality_strings = prover.get_qualities_for_challenge(
new_challenge.challenge_hash)
except RuntimeError:
log.error(
f"Retry-Error using prover object on {filename}. Giving up."
)
quality_strings = None
if quality_strings is not None:
for index, quality_str in enumerate(quality_strings):
quality = ProofOfSpace.quality_str_to_quality(
new_challenge.challenge_hash, quality_str)
self.challenge_hashes[quality] = (
new_challenge.challenge_hash,
filename,
uint8(index),
)
response: harvester_protocol.ChallengeResponse = harvester_protocol.ChallengeResponse(
new_challenge.challenge_hash, quality,
prover.get_size())
all_responses.append(response)
for response in all_responses:
yield OutboundMessage(
NodeType.FARMER,
Message("challenge_response", response),
Delivery.RESPOND,
)
async def lookup_challenge(
filename: Path, prover: DiskProver
) -> List[harvester_protocol.ChallengeResponse]:
# Exectures a DiskProverLookup in a threadpool, and returns responses
all_responses: List[harvester_protocol.ChallengeResponse] = []
quality_strings = await loop.run_in_executor(
self.executor, blocking_lookup, filename, prover)
if quality_strings is not None:
for index, quality_str in enumerate(quality_strings):
response: harvester_protocol.ChallengeResponse = harvester_protocol.ChallengeResponse(
new_challenge.challenge_hash,
str(filename),
uint8(index),
quality_str,
prover.get_size(),
)
all_responses.append(response)
return all_responses