# Quick Fix: Database Connection

## The Issue

You tried to connect with `blockscout` user, but the **custom explorer backend** uses the `explorer` user.

## Correct Command

```bash
# ✅ Correct - for custom explorer backend
PGPASSWORD='***REDACTED-LEGACY-PW***' psql -h localhost -U explorer -d explorer -c "SELECT 1;"
```

## Quick Steps

1. **Test connection:**
   ```bash
   PGPASSWORD='***REDACTED-LEGACY-PW***' psql -h localhost -U explorer -d explorer -c "SELECT 1;"
   ```

2. **Run migration:**
   ```bash
   cd explorer-monorepo
   PGPASSWORD='***REDACTED-LEGACY-PW***' psql -h localhost -U explorer -d explorer \
     -f backend/database/migrations/0010_track_schema.up.sql
   ```

3. **Restart server:**
   ```bash
   pkill -f api-server
   cd explorer-monorepo/backend
   export DB_PASSWORD='***REDACTED-LEGACY-PW***'
   ./bin/api-server
   ```

4. **Verify:**
   ```bash
   curl http://localhost:8080/health
   ```

## Two Separate Systems

- **Blockscout:** User `blockscout`, Password `blockscout`, DB `blockscout`
- **Custom Explorer:** User `explorer`, Password `***REDACTED-LEGACY-PW***`, DB `explorer`

See `docs/DATABASE_CONNECTION_GUIDE.md` for full details.