Can anybody help me out of this error?

Smart Contracts
,
1

Hello Devs
I tried to change the version of my contract from 0.6.12 to 0.8.0 and I got the error below on the part I show you, please let me know what is happened and how to fix it?
Thanks

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this;
        return msg.data;
    }
}

This is the error:
TypeError: Return argument type address is not implicitly convertible to expected type (type of first return variable) address payable.

2

I think you can have a look at the latest code of the OpenZeppelin

openzeppelin-contracts/Context.sol | OpenZeppelin/openzeppelin-contracts

1 Like
3

You got the error cause you got a helper library like the openZeppelin contract library with a different solidity version

1 Like
4

Hey @shawn_t
as @Skyge suggested you should use the latest version of Context.sol
Btw an easy fix is to cast the msg.sender to payable in this way:

function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }
1 Like
5

Thank you, I just correct the code the way you suggest now it is working, appreciate it

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6

Btw, can you tell me how to use the latest version of Context.sol? should I just import it?

7

You can simply remove the payable for _msgSender function from address payable to address

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        //this;
        return msg.data;
    }
}
1 Like