tokens transfer before given lock time?

Question

`pragma solidity ^0.6.6;

contract timeBound{

uint256 timeLocked = 1589026500;

event Transfer(address _from, address _to, uint256);

mapping(address => uint256) private balance;


modifier timeChecker{
    require(block.timestamp >= timeLocked, "ERC20: time locked for certain period");
    _;
}

function lockCall() public timeChecker {
    uint256 value = 10;
    address receiver = 0xDd395D13d892Fb482e5E7392e0f58BC4F55c9d69;

    require(msg.sender != address(0));

    balance[receiver] = balance[receiver] + value;
    emit Transfer(address(msg.sender), address(receiver), value);
}

//This balanceOf() function not returns the token balance of this contract
function balanceOf(address account) public view returns(uint256){
    return balance[account];
}

}`

in the above contract timeLocked variable is used for next 15 minutes, and require(block.timestamp >= timestamp) is checking, when i deployed it on ropsten testnet, the receiver gets tokens immediately before the desire time. how to counter this issue?

balanceOf function not returns the contract token balance but the contract has tokens which will transfer in the lockCall function to the given address.

Answer 1

So it's not immediately clear from your code exactly what you're trying to achieve. However - one quick comment that might help:

You appear to be hard-coding the timestamp - this could cause you problems unless you remember to change it every time you deploy and test the code. You could add timeLocked = block.timestamp + 15 minutes into a constructor function to at least test that you're in sync with the time of the blockchain you're using