i am getting the error in truffle but in online compiler(remix)there is not showing any error in this keyword and selfdestruct function

Question

TypeError: Invalid type for argument in function call. Invalid implicit conversion from contract spsTokenSale to address requested. require(tokenContract.balanceOf(this)>= _numberOfTokens);

Invalid type for argument in function call. Invalid implicit conversion from address to address payable requested. selfdestruct(admin);

Answer 1

You need to provide code for better understanding. May be you have not declared address 'payable' that's why you are facing this "Invalid implicit conversion from address to address payable requested" issue.

As in latest version of solidity you must declare address also as payable if it will be receiving/transferring ethers.

If the issue is in truffle not in remix you can check for the version of solidity in truffle box. As it's most likely version mismatch issue.

Answer 2

If you are using solidity version > 7 then your syntex is not correct.Use address(this) if you want to access your contract address & use selfdestruct(payable(admin)); if you want to destroy your smart contract .

require(tokenContract.balanceOf(address(this))>= _numberOfTokens);
selfdestruct(payable(admin));

Answer 3

I saw the solution to this question in another forum. The compiler requires you to explicitly declare the type of the token address.

Instead of using tokenContract.balanceOf(this), change it to tokenContract.balanceOf(address(this)).

Refer to this link for more details - https://ethereum.stackexchange.com/questions/64868/typeerror-invalid-type-for-argument-in-function-call-invalid-implicit-conversi/64869