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From my understanding, one Ethereum node can have many accounts and only one of the account can perform mining in each node. So, my question will be what are the usage of other accounts in the node then? If an account deployed a contract, can other accounts call function of that contract even they are from the same node?
*Please correct me if my understanding are wrong. Thanks.
"can other accounts call function of that contract even they are from the same node?" => Yes they can.
Other accounts can have each balances.
Node can accept RPC(remote procedure call) request, and through RPC request, each node's accounts can send transaction and create smart contract.
Multiple node's accounts are useful to simulate some transactions when developing.
