--checkpoint-sync-url

• Lighthouse: lighthouse bn --checkpoint-sync-url=https://mainnet-checkpoint-sync.attestant.io
• Prysm: beacon-chain --checkpoint-sync-url

Jun 13 10:17:57.101 INFO Starting checkpoint sync                remote_url: https://mainnet-checkpoint-sync.attestant.io/, service: beacon

Jun 13 10:14:29.078 INFO Refusing to checkpoint sync             msg: database already exists, use --purge-db to force checkpoint sync, service: beacon

Attestant.io an Ethereum beacon chain checkpoint sync provider
--genesis-backfill

See also

• Ethereum Beacon Chain, lighthouse beacon_node
• Beacon Chain, Ropsten Beacon Chain, Bellatrix beacon chain, The Merge, BeaconChainRpcEndpoints, lighthouse beacon_node, 5052