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I am unable to use the 'this' Keyword in below code.

    function buyTokens(uint256 _numberOfTokens) public payable {
    require(msg.value == multiply(_numberOfTokens, tokenPrice));
    require(tokenContract.balanceOf(this) >= _numberOfTokens);(issue is here)
    require(tokenContract.transfer(msg.sender, _numberOfTokens));

giving below error.

TypeError: Invalid type for argument in function call. Invalid 
  implicit conversion from contract DappTokenSale to address requested.
    require(tokenContract.balanceOf(this) >= _numberOfTokens);
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  • Replying to @goodvibration Thanks for the tip! The comment says implicit conversion from contract DappTokenSale to address. So just use an explicit conversion instead - change this to address(this). Fully written out explicit conversion would be in your contract: require(tokenContract.balanceOf(address(this)) >= _numberOfTokens);
    – Scott
    Commented May 20, 2021 at 16:43

1 Answer 1

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The comment says implicit conversion from contract DappTokenSale to address.

So just use an explicit conversion instead - change this to address(this).

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  • Oh my bad its so silly question. Thanks @goodvibration for that.
    – Abhijeet Samanta
    Commented Jan 1, 2019 at 15:59

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