Mainnet Explorer Backend

The backend API service for the mainnet block explorer, built with Node.js and BullMQ. Handles block indexing, transaction processing, and serves the explorer frontend with blockchain data via REST endpoints. The /api/status endpoint returns sync state, worker health, and queue metrics. If this backend is down, the explorer frontend shows stale or no data.

Operational

Environment

prod

Response Time

Average

264ms

Min

103ms

Max

425ms

p99

425ms

Uptime History

2 checks agoNow

Direct Links

Troubleshooting

Possible causes:

BullMQ blockSync job stuck in active state— Fix: SSH to server, clear queue: docker exec <backend> node -e "...Queue('blockSync')...obliterate()..."; restart workers
PM2 sync process crashed— Fix: Check PM2 logs: docker exec <pm2> pm2 logs --lines 50; restart: docker compose restart pm2
EVM indexer disabled on chain node— Fix: Set enable-indexer = true in app.toml, restart node, run: intgd index-eth-tx backward && intgd index-eth-tx forward
Workers disconnected from Redis/RPC— Fix: docker compose restart high_priority_worker medium_priority_worker low_priority_worker
Missing DB columns causing silent INSERT failures— Fix: Run migration: docker exec <backend> npx sequelize-cli db:migrate

Dependencies

Depends on