How to include a json-rpc in the pow consensus building on Substrate? - json-rpc

Question

In the pow consensus module of substrate, the miner does not dig ore by means of RPC access, how to access?
I don't have idea.
fn mine(
&self,
parent: &BlockId<B>,
pre_hash: &H256,
difficulty: Difficulty,
round: u32,
) -> Result<Option<RawSeal>, String> {
let mut rng = SmallRng::from_rng(&mut thread_rng())
.map_err(|e| format!("Initialize RNG failed for mining: {:?}", e))?;
let key_hash = key_hash(self.client.as_ref(), parent)?;
for _ in 0..round {
let nonce = H256::random_using(&mut rng);
let compute = Compute {
key_hash,
difficulty,
pre_hash: *pre_hash,
nonce,
};
let seal = compute.compute();
if is_valid_hash(&seal.work, difficulty) {
return Ok(Some(seal.encode()))
}
}
Ok(None)
}

Answer 1

I suggest you follow a pattern similar to Kulupu for creating a PoW Substrate blockchain.
In Kulupu, it seems the Substrate service starts mining if it detects your are an "authority":
/// Builds a new service for a full client.
pub fn new_full<C: Send + Default + 'static>(config: Configuration<C, GenesisConfig>, author: Option<&str>, threads: usize, round: u32)
-> Result<impl AbstractService, ServiceError>
{
let is_authority = config.roles.is_authority();
let (builder, inherent_data_providers) = new_full_start!(config, author);
let service = builder
.with_network_protocol(|_| Ok(NodeProtocol::new()))?
.with_finality_proof_provider(|_client, _backend| {
Ok(Arc::new(()) as _)
})?
.build()?;
if is_authority {
for _ in 0..threads {
let proposer = basic_authorship::ProposerFactory {
client: service.client(),
transaction_pool: service.transaction_pool(),
};
consensus_pow::start_mine(
Box::new(service.client().clone()),
service.client(),
kulupu_pow::RandomXAlgorithm::new(service.client()),
proposer,
None,
round,
service.network(),
std::time::Duration::new(2, 0),
service.select_chain().map(|v| v.clone()),
inherent_data_providers.clone(),
);
}
}
Ok(service)
}
In this case, you just need to start your node with the --validator flag and an --author flag with address:
cargo run --release -- --validator --author 0x7e946b7dd192307b4538d664ead95474062ac3738e04b5f3084998b76bc5122d