Banking tracer with simulator wip#2
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| // This creates a simulated environment around the banking stage to reproduce leader's blocks based |
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Oct 24, 2025
* Apply the retry code to the async pubsub client
Create a test server
```ts
import http from "http";
import { WebSocketServer } from "ws";
let attemptCount = 0;
const server = http.createServer();
const wss = new WebSocketServer({ noServer: true });
wss.on("connection", (ws) => {
ws.send("Connection accepted.");
ws.on("message", (msg) => console.log(`Received: ${msg}`));
});
server.on("upgrade", (req, socket, head) => {
attemptCount += 1;
if (attemptCount <= 4) {
socket.write("HTTP/1.1 429 Too Many Requests\r\n\r\n");
socket.destroy();
console.log(`Rejected connection #${attemptCount} (429)`);
return;
}
wss.handleUpgrade(req, socket, head, (ws) => {
wss.emit("connection", ws, req);
console.log("Connection accepted on attempt", attemptCount);
});
});
server.listen(8080, () => {
console.log("Server listening on port 8080");
});
```
Run `test_slot_subscription_async`:
```
Rejected connection #1 (429)
Rejected connection #2 (429)
Rejected connection #3 (429)
Rejected connection #4 (429)
Connection accepted on attempt 5
Received: {"id":1,"jsonrpc":"2.0","method":"slotSubscribe","params":[]}
```
* `s/async_with_retry/with_retry/`
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this is wip pr/branch just to be shared quickly, not intended for code-reviews (even including casual ones!); built on solana-labs#29196
Problem
this kinda work...: i.e reference vs simulation kinda exhibit similar throughput and each simulations are quite similar in numbers. the first bank's hash is even identical. lol
reference
https://explorer.solana.com/block/167249284?cluster=testnet
https://explorer.solana.com/block/167249285?cluster=testnet
https://explorer.solana.com/block/167249286?cluster=testnet
https://explorer.solana.com/block/167249287?cluster=testnet
simulations
solana-ledger-tool -- --ledger ~/ledger-testnet-for-tracer-slot-167249284/ simulate-leader-blocks --halt-at-slot 167249283 < ~/ledger-testnet-for-tracer-slot-167249284/banking_trace/eventsrun 1
run 2
run 3
Summary of Changes
Fixes #