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Merged
norselabsdev merged 1 commit into from
May 1, 2026
Merged

WIP #7

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23 changes: 14 additions & 9 deletions api/src/base-watcher.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -169,6 +169,7 @@ async function catchUpMissedEvents(
operator: SentinelOperator | null,
): Promise<void> {
const LOOKBACK_BLOCKS = 1000;
const CHUNK_SIZE = 10; // Alchemy free tier caps eth_getLogs at 10 blocks

try {
const provider = contract.runner?.provider;
Expand All @@ -180,18 +181,22 @@ async function catchUpMissedEvents(
console.log(`[x402] Scanning blocks ${fromBlock}–${currentBlock} for missed events...`);

const filter = contract.filters.VpnPayment();
const events = await contract.queryFilter(filter, fromBlock, currentBlock);

let processed = 0;
for (const event of events) {
if (!('args' in event)) continue;
const log = event as ethers.EventLog;
const [_sender, agentId, numDays, amount] = log.args;

if (db.getPaymentByTxHash(log.transactionHash)) continue;
for (let start = fromBlock; start <= currentBlock; start += CHUNK_SIZE) {
const end = Math.min(start + CHUNK_SIZE - 1, currentBlock);
const events = await contract.queryFilter(filter, start, end);

for (const event of events) {
if (!('args' in event)) continue;
const log = event as ethers.EventLog;
const [_sender, agentId, numDays, amount] = log.args;

await processPaymentEvent(agentId, Number(numDays), amount, log.transactionHash, db, config, operator);
processed++;
if (db.getPaymentByTxHash(log.transactionHash)) continue;

await processPaymentEvent(agentId, Number(numDays), amount, log.transactionHash, db, config, operator);
processed++;
}
}

console.log(`[x402] Catch-up: ${processed > 0 ? `processed ${processed} missed events` : 'no missed events'}`);
Expand Down