I have created ethereum private network. there are two node got connected with in this network. both are mining. I have created small contract for transaction. All transaction is happening through my application with my contract.
if i add other node:
Can i remove that node from the private network?(in case they do unwanted transaction)
Can i make other node has to use contract whenever they do normal transaction in ethereum console?
Can i restrict them to create contract?
Can i restrict them to do transactions except verifying?