How to get a variable from the smart contract with web3 and abi?

Question

I use web3.js and try to take a value of the variable from the smart contract.

My code for it is:

var contract = web3.eth.contract(abi).at(address);

where abi - json array and address - valid working address.

Part of abi json object is

{
      "constant": true,
      "inputs": [],
      "name": "weiRaised",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "type": "function"
},

When I use this code:

console.log(contract.abi[0].abi[6].name);

I see "weiRaised" in the console.

But if I use

console.log(contract.abi[0].abi[6].inputs);

I see 'undefined'.

What I am doing wrong? How Can I get the variable from the smart contract, based on abi and web3.js?

Answer 1

After printing stuff on the console, God let me go to sleep with joy =)

var contract = web3.eth.contract(abi).at(address);
async function getContractPublicVariable() {
    const weiRaised = await contract.methods.weiRaised.call().call();
}

so the idea is contract.methods.VARIABLENAME.call().call();

Answer 2

Web3.js will automagically map the ABI functions onto the contract object that you get back from web3.eth.contract(abi).at(address).

This means you can access the value of the variables by doing something like:

let weiRaisedValue = contract.weiRaised.call()