contract balanceOf call, response "owner_address isn't set."

[tronprotocol]

contract balanceOf call, response "owner_address isn't set."

[joadr]

Why would you need to set an address for calling a balanceOf?

Setting the private key is not a great advise to be honest. You should try to avoid keeping your private key available as a string in your application. Keep it on a secure device for example. Not in the memory of your software. Anyway, this issue can also be fixed by applying the following code:

tronWeb.setAddress('TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t');

So that would be:

const TronWeb = require('tronweb')

const tronWeb = new TronWeb({
  fullNode: 'https://api.trongrid.io',
  solidityNode: 'https://api.trongrid.io',
})

// set the owner address
tronWeb.setAddress('TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t');

// read trc20 account balance
let contract = await tronWeb.contract().at("TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t"); 
let result = await contract.balanceOf('TZ13rQk53DDvK2pR4nfBLyuYTR4EGAFBwT').call();```

[Jo-Chris]

Any explanation as to why we have to set an address here?

[CQBinh]

@XiChaoSir if you are developing at serverside, let pass the privateKey to TronWeb:

const tronWeb = new TronWeb({
  fullNode,
  solidityNode,
  eventServer,
  privateKey
})

[MonchiLin]

In addition to the above methods, you can also use transactionBuilder.triggerSmartContract.

const balanceOfRes = await this.tronWeb.transactionBuilder
  .triggerSmartContract(
    "Contract Address",
    "balanceOf(address)",
    options,
    [
      {
        type: 'address',
        value: "Balance Of Wallet Address"
      }
    ],
    "Wallet Address"
);

For example:

// Get USDT balance of TSu8rSjd86uhtY7EVNazZsuEA7p1DdohZ8
const balanceOfRes = await this.tronWeb.transactionBuilder
  .triggerSmartContract(
    "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t",
    "balanceOf(address)",
    options,
    [
      {
        type: "address",
        value: "TSu8rSjd86uhtY7EVNazZsuEA7p1DdohZ8"
      }
   ],
    "TSu8rSjd86uhtY7EVNazZsuEA7p1DdohZ8"
);

Docs: https://developers.tron.network/reference/tronweb-triggersmartcontract

[itxtoledo]

tron is funny

[kricha]

any news here?

[G33kNoob]

tronWeb.setAddress('TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t');

worked thanks