How can I find out the token balance of an address?


I am using the contract from:

I have seen that it has a public variable which is:

mapping (address => uint) public balanceOf;

I am trying to call in my contract, but it is not very clear to me how to use it, if via interface or in what way

contract checkBalanceOf {
    mapping (address => uint) public  balanceOf;
    function balanceOf() public returns (uint256) {
        address  ERC20Address = targetInterface(0x18895B2a605CdAb301482d8F96E59FaDc17964C3);
        return ERC20Address.balanceOf(bankAddress);

I was trying to apply the logic of this answer, but unlike, that this one does not have a public function

is posible call public view return deployed, from anther contract?


In order to check how many WBNB the bankAddress owns, and to perform the check from your own contract, your contract needs to:

  1. Define the balanceOf() function in an interface
  2. Instantiate the interface pointing to the WBNB contract address
  3. Call the WBNB function balanceOf() passing it the bankAddress
  4. Recommended: Wrap the call in a view function so that by default it uses a call, not a transaction, in some client apps.
pragma solidity ^0.8;

interface IBEP20 {
    // mind the `view` modifier
    function balanceOf(address _owner) external view returns (uint256);

contract checkBalanceOf {
    address bankAddress = address(0x123);

    // mind the `view` modifier
    function balanceOf() external view returns (uint256) {
        // creating a pointer to the WBNB contract
        IBEP20 WBNBContract = IBEP20(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);

        // getting balance of `bankAddress` on the WBNB contract
        return WBNBContract.balanceOf(bankAddress);

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