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Contract fail to compile in IDE Remix.due to the following error:

TypeError: Data location must be "storage" or "memory" for parameter in function, but none was given.

version:0.5.6+commit.b259423e

I have no idea why this happened and i have not found any sufficient information on how i can fix it and was hoping you can help me. Thank you in Advance.

The error points to this function:

function bytesToAddress(bytes bys) pure private returns(address addr) {
        assembly {
            addr := mload(add(bys, 20))
        }
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4
  • Change bytes bys to bytes memory bys.
    – goodvibration
    Mar 14, 2019 at 7:43
  • Thanks..that fix it but now points to the following: TypeError: "send" and "transfers" are only available for objects of type "address payable", not "address" The error poins to this line: msg.sender.transfer(amount); contractfunds.transfer(msg.value.mul(DEVWORK).div(1));
    – fortza italia
    Mar 14, 2019 at 7:54
  • Thanks..that fix it but now points to the following: TypeError: "send" and "transfers" are only available for objects of type "address payable", not "address" The error poins to this line: msg.sender.transfer(amount); contractfunds.transfer(msg.value.mul(DEVWORK).div(1));
    – fortza italia
    Mar 14, 2019 at 7:59
  • There are no send or transfer or msg.sender.transfer(amount); contractfunds.transfer(msg.value.mul(DEVWORK).div(1)) in your question!!!
    – goodvibration
    Mar 14, 2019 at 8:16

2 Answers 2

Reset to default
2

It needs to be

function bytesToAddress(bytes memory bys) ...

Hope it helps.

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0

I think you need to specify them as addresses.

https://ethereum.stackexchange.com/a/65609/52189

I had a piece of code that had to change from :

user_address.transfer(this.balance);

to in 0.5.0 solidity:

address(uint160(user_address)).transfer(address(this).balance);
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