hoax
签名
function hoax(address who) public;
function hoax(address who, uint256 give) public;
function hoax(address who, address origin) public;
function hoax(address who, address origin, uint256 give) public;
描述
从一个有一些 ether 的地址设置一个 prank，
如果没有指定余额，它将被设置为 2^128 wei。