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better handling when method not available

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This commit is contained in:
Bryan Stitt 2023-01-24 09:36:07 -08:00
parent 447cf90eed
commit 106dec294f
1 changed files with 36 additions and 6 deletions
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42
web3_proxy/src/rpcs/connections.rs
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@ -749,6 +749,7 @@ impl Web3Connections {
wait_for_sync: bool,
) -> anyhow::Result<JsonRpcForwardedResponse> {
let mut skip_rpcs = vec![];
let mut method_not_available_response = None;
let mut watch_consensus_connections = if wait_for_sync {
Some(self.watch_consensus_connections_sender.subscribe())
@ -761,7 +762,6 @@ impl Web3Connections {
// TODO: is self.conns still right now that we split main and backup servers?
// TODO: if a new block arrives, we probably want to reset the skip list
if skip_rpcs.len() == self.conns.len() {
// no servers to try
break;
}
match self
@ -802,7 +802,7 @@ impl Web3Connections {
request.id.clone(),
) {
Ok(response) => {
if let Some(error) = &response.error {
if let Some(error) = &response.error.as_ref() {
// trace!(?response, "rpc error");
if let Some(request_metadata) = request_metadata {
@ -843,9 +843,22 @@ impl Web3Connections {
-32601 => {
let error_msg = error.message.as_str();
// sometimes a provider does not support all rpc methods
// we check other connections rather than returning the error
// but sometimes the method is something that is actually unsupported,
// so we save the response here to return it later
// some providers look like this
if error_msg.starts_with("the method")
&& error_msg.ends_with("is not available")
{
method_not_available_response = Some(response);
continue;
}
// others look like this
if error_msg == "Method not found" {
method_not_available_response = Some(response);
continue;
}
}
@ -888,6 +901,7 @@ impl Web3Connections {
{
// TODO: if there are other servers in synced_connections, we should continue now
// wait until retry_at OR synced_connections changes
trace!("waiting for change in synced servers or retry_at");
tokio::select! {
_ = sleep_until(retry_at) => {
skip_rpcs.pop();
@ -899,7 +913,8 @@ impl Web3Connections {
}
continue;
} else {
break;
sleep_until(retry_at).await;
continue;
}
}
OpenRequestResult::NotReady => {
@ -908,18 +923,25 @@ impl Web3Connections {
}
if wait_for_sync {
trace!("waiting for change in synced servers");
// TODO: race here. there might have been a change while we were waiting on the previous server
self.watch_consensus_connections_sender
.subscribe()
.changed()
.await?;
} else {
break;
// TODO: continue or break?
continue;
}
}
}
}
if let Some(r) = method_not_available_response {
// TODO: emit a stat for unsupported methods?
return Ok(r);
}
// TODO: do we need this here, or do we do it somewhere else?
if let Some(request_metadata) = request_metadata {
request_metadata
@ -929,9 +951,17 @@ impl Web3Connections {
let num_conns = self.conns.len();
error!("No servers synced ({} known)", num_conns);
if skip_rpcs.is_empty() {
error!("No servers synced ({} known)", num_conns);
Err(anyhow::anyhow!("No servers synced ({} known)", num_conns))
Err(anyhow::anyhow!("No servers synced ({} known)", num_conns))
} else {
Err(anyhow::anyhow!(
"{}/{} servers erred",
skip_rpcs.len(),
num_conns
))
}
}
/// be sure there is a timeout on this or it might loop forever