[Ethereum] Returns (bool) check in function

solidity

I've seen many functions using a returns (bool). What does it do? What can it be used for?

function transferFrom(address from, address to, uint256 value) public returns (bool);

Best Answer

It returns a boolean value, ie true or false.

Assuming you are reading from a token spec, that transferFrom function most likely should return true if the transfer is made successfully, and false if it fails.

Related Solutions

[Ethereum] This contract does not implement all functions and thus cannot be created

The problem is that totalSupply() implementation is missing. Seems like autogenerated getters do not count. So you need to explicitly create the function.

contract StandardToken is Token {
    uint256 _totalSupply;

    function totalSupply() constant returns (uint256 totalSupply) {
        totalSupply = _totalSupply;
    }
}

Best Answer

Related Solutions

[Ethereum] This contract does not implement all functions and thus cannot be created

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