To sync the explorer's local database with the blockchain information, a dedicated script, sync.js (located in scripts/), is available. This script must be called from the explorer's root directory as follows:

node scripts/sync.js index [mode]

For the mode option, you can choose one of the following modes:

• update: Updates the index from the last sync to the current block
• check: Checks the index for (and adds) any missing transactions/addresses
• reindex: Clears the index and then resyncs from genesis to the current block

As indicated in the official documentation, it's recommended to have this script launched via a cronjob at 2+ minute intervals. For example, to update the index every minute and market data every two minutes, use the following:

*/1 * * * * cd /path/to/explorer && /usr/bin/nodejs scripts/sync.js index update > /dev/null 2>&1
*/5 * * * * cd /path/to/explorer && /usr/bin/nodejs scripts/peers.js > /dev/null 2>&1