Receives the latest Hash using the Hash Pointer Collaboration Protocol.
The messages are published to {COMPUTES_NAMESPACE}:computes:hpcp:{ORIGIN_HASH}.
ipfs pubsub sub namespace:computes:hpcp:originHash
> zdpuAkw2YXyvH7ZjahsHe1Q55M7eU84xB6rUA2CYZbiypRrto