Skip to content

feat: periodic recovery after WS failure #225

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
kss-t1 merged 1 commit into from
Jan 7, 2026
Merged

feat: periodic recovery after WS failure #225

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
42 changes: 35 additions & 7 deletions tee-apps/sealed-bid-auction/src/blockchain/ViemIntentObserver.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,8 @@ const HISTORICAL_BLOCK_CHUNK_SIZE = 100n;
export class ViemIntentObserver {
private logger: WinstonLogger;

private websocketError: boolean = false;
private catchupTimer: Timer | null = null;
private catchupRunning = false;
private lastProcessedBlock: bigint | null = null;

constructor(
Expand Down Expand Up @@ -52,15 +53,16 @@ export class ViemIntentObserver {
address: this.sourceChainT1Erc7683ContractAddress,
event: OPEN_INTENT_ABI_EVENT,
onLogs: async (logs) => {
if (this.websocketError && this.lastProcessedBlock) {
this.logger.info(`I recovered from websocket error! Fetching historical logs from block ${this.lastProcessedBlock + 1n}`);
await this.fetchHistoricalLogs(this.lastProcessedBlock + 1n);
this.websocketError = false;
}
await this.processIntentLogs(logs);
},
onError: (error) => {
Comment thread
kss-t1 marked this conversation as resolved.
this.websocketError = true;
if (!this.catchupTimer) {
this.catchupTimer = setInterval(
() => this.tryRecoverWebsocket(),
5_000,
);
}

this.logger.error(`Error from publicClient.watchEvent: ${error}`);
},
});
Expand Down Expand Up @@ -245,4 +247,30 @@ export class ViemIntentObserver {

return await this.sourceChainClient.signTypedData(domain, types, message);
}

private async tryRecoverWebsocket() {
if (this.catchupRunning) return;
this.catchupRunning = true;

try {
// This will throw while the endpoint is still unavailable.
await this.sourceChainClient.publicClient.getBlockNumber();

const nextBlock = this.lastProcessedBlock ? this.lastProcessedBlock + 1n : this.initialFromBlock ?? 0n;

this.logger.info(
`WS recovered (RPC reachable). Catching up from block ${nextBlock.toString()}`,
);
await this.fetchHistoricalLogs(nextBlock);

if (this.catchupTimer) {
clearInterval(this.catchupTimer);
this.catchupTimer = null;
}
} catch (e) {
this.logger.debug(`Catchup poll failed (WS still down): ${e}`);
} finally {
this.catchupRunning = false;
}
}
}