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[indexer] await listeners and improve health check
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Original file line number | Diff line number | Diff line change |
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@@ -1,22 +1,34 @@ | ||
import { ethers } from "ethers"; | ||
import { listenToEvents } from "./events"; | ||
import { writeEvent } from "./mongo"; | ||
import express from "express"; | ||
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||
async function run() { | ||
listenToEvents((factchainEvent) => { | ||
console.log("Created factchain event", factchainEvent); | ||
async function run(): Promise<ethers.Contract[]> { | ||
return await listenToEvents((factchainEvent) => { | ||
writeEvent(factchainEvent); | ||
}); | ||
} | ||
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const app = express(); | ||
const port = process.env.PORT; | ||
let listeningContracts: ethers.Contract[] = []; | ||
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app.get("/", (req, res) => { | ||
res.send("OK"); | ||
app.get("/", async (req, res) => { | ||
const contractsHaveListeners = await Promise.all( | ||
listeningContracts.map(async (contract) => { | ||
const listenerCount = await contract.listenerCount(); | ||
console.log(`Listening to ${contract.address} events, with ${listenerCount} listeners`); | ||
return listenerCount > 0; | ||
}) | ||
); | ||
if (contractsHaveListeners.every((hasListeners) => hasListeners)) { | ||
res.send("OK"); | ||
} else { | ||
res.status(500).send("Not all contracts have listeners"); | ||
} | ||
}); | ||
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||
app.listen(port, () => { | ||
app.listen(port, async () => { | ||
console.log(`synchroniser listening on port ${port}`); | ||
run().catch(console.dir); | ||
listeningContracts = await run(); | ||
}); |