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- Add functions to fetch from peers.
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use crate::{ | ||
api::endpoints::{AccountQueryData, BlocksFrontier}, | ||
state::{BlockMerkleCommitment, BlockMerkleTree, FeeAccount, FeeMerkleTree}, | ||
}; | ||
use hotshot_types::{data::ViewNumber, traits::node_implementation::ConsensusTime as _}; | ||
use jf_primitives::merkle_tree::{MerkleCommitment as _, MerkleTreeScheme as _}; | ||
use surf_disco::Client; | ||
use tide_disco::error::ServerError; | ||
use url::Url; | ||
|
||
#[derive(Debug, Clone, Default)] | ||
pub struct StatePeers { | ||
clients: Vec<Client<ServerError>>, | ||
} | ||
|
||
impl StatePeers { | ||
pub fn from_urls(urls: Vec<Url>) -> Self { | ||
Self { | ||
clients: urls.into_iter().map(Client::new).collect(), | ||
} | ||
} | ||
|
||
pub async fn remember_account_balance( | ||
&self, | ||
view: ViewNumber, | ||
account: FeeAccount, | ||
fee_merkle_tree: &mut FeeMerkleTree, | ||
) { | ||
loop { | ||
for client in self.clients.iter() { | ||
match client | ||
.get::<AccountQueryData>(&format!( | ||
"state/catchup/{}/account/{}", | ||
view.get_u64(), | ||
account.address() | ||
)) | ||
.send() | ||
.await | ||
{ | ||
Ok(res) => match res.proof.remember(fee_merkle_tree) { | ||
Ok(_) => return, | ||
Err(err) => tracing::warn!("Error verifying account proof: {}", err), | ||
}, | ||
Err(err) => { | ||
tracing::warn!("Error fetching account from peer: {}", err); | ||
} | ||
} | ||
} | ||
tracing::warn!("Could not fetch account from any peer, retrying"); | ||
// TODO: backoff? for testing a function that doesn't loop forever is probably more convenient. | ||
} | ||
} | ||
|
||
pub async fn fetch_blocks_frontier( | ||
&self, | ||
view: ViewNumber, | ||
root: BlockMerkleCommitment, | ||
) -> Option<BlocksFrontier> { | ||
for client in self.clients.iter() { | ||
match client | ||
.get::<BlocksFrontier>(&format!("state/catchup/{}/blocks", view.get_u64())) | ||
.send() | ||
.await | ||
{ | ||
Ok(frontier) => { | ||
match BlockMerkleTree::verify(root.digest(), root.size() - 1, &frontier) { | ||
Ok(_) => return Some(frontier), | ||
Err(err) => tracing::warn!("Error verifying block proof: {}", err), | ||
} | ||
} | ||
Err(err) => { | ||
tracing::warn!("Error fetching blocks from peer: {}", err); | ||
} | ||
} | ||
} | ||
None | ||
} | ||
} |
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