Clarification on eth_rpc_url Usage in Validator and Impact

[AmardeepSambaru]

Hi Good morning,

Iam a node Operator. we are planning to setup the Validator node. studied the Validator setup doc and i found In heimdall-config.toml, change the following:
"eth_rpc_url — an RPC endpoint for a fully synced Ethereum mainnet node" this line.

Could you please clarify the purpose of using the eth_rpc_url? Additionally, if the eth_rpc_url goes down, will this affect the validator node? If so, what kind of issues should we expect?

Thanks.