Call contract from another account using web3.js

Question

I have a contract with which 2 accounts should interact.

The accounts are in the same node in web3.eth.accounts.

The contract was created by accounts[0].

How can I call that contract from accounts[1] from web3.js?

Answer 1

when you call your function you can specify a from parametern in the transactionOptions. Suppose you have a contract instance contract and want to call vote function. Then this calls it from account 1:

let account0;
web3.eth.getAccounts().then(function(result) {
  account0 = result[0];
  contract.vote(2, {
    from: account0
  });
});

You can read more about it here: https://github.com/ethereum/wiki/wiki/JavaScript-API#contract-methods