smart-contract/contracts/Read/InstaBalRead.sol

pragma solidity ^0.5.8;
pragma experimental ABIEncoderV2;

interface TokenInterface {
    function balanceOf(address) external view returns (uint);
}


contract DSMath {

    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, "math-not-safe");
    }

    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, "math-not-safe");
    }

    uint constant WAD = 10 ** 18;

    function wmul(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, y), WAD / 2) / WAD;
    }

    function wdiv(uint x, uint y) internal pure returns (uint z) {
        z = add(mul(x, WAD), y / 2) / y;
    }

}


contract Helpers is DSMath {

    /**
     * @dev get ethereum address
     */
    function getAddressETH() public pure returns (address eth) {
        eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    }
}


contract InstaBalRead is Helpers {
    function getTokensBalData(address owner, address[] memory tknAddress) public view returns (uint[] memory) {
        uint[] memory tokensBal = new uint[](tknAddress.length);
        for (uint i = 0; i < tknAddress.length; i++) {
            if (tknAddress[i] == getAddressETH()) {
                tokensBal[i] = owner.balance;
            } else {
                TokenInterface token = TokenInterface(tknAddress[i]);
                tokensBal[i] = token.balanceOf(owner);
            }
        }
        return tokensBal;
    }
}