任何人都可以调用ERC20令牌的transferFrom函数吗？

Question

For the following code:

contract ERC20Token {
    function transferFrom(address from, address to, uint value);
}

contract MyContract {
    function myFunction(address tokenAddr) {
      ERC20Token tok = ERC20Token(tokenAddr);
      tok.transferFrom(_owner, _recipient, 100);
    }
}

Can anyone call transferFrom function of a ERC20 token?

Answer 1

Anyone can call any function they want, so in a literal sense, yes, anyone can call it.

But in an ERC20-compliant token contract, that transaction will revert unless the caller has been authorized to transfer enough tokens from the from address.