1
It's okay to define a contract instance every time you need it,
as the ABI and deployed address haven't changed, and your web3 library
is only creating a Javascript object off-chain, not checking on-chain
or doing anything slow over the network.
I think the efficiency difference is negligible, but if you can create your contract instance once and pass it ...
1
The solution was to create and add the account from which to send the transaction into a wallet.
adding the line
web3.eth.accounts.wallet.add('address_private_key')
above the method.send() fixed it for me.
1
This line:
contract.getCounter().send();
should be
contract.getCounter().call({from:yourAccount});
Reason
When you request state from Ethereum, it doesn't cost gas because you're just reading a node. If the node is on your computer, you're just reading your hard drive. On the other hand, when you change state, it requires miners to pick up the change ...
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