`address.transfer`是否将所有的气体(可吸入到可再入的气体)转发？

Question

从稳健性文档中，我不明白最近引入的address.transfer是将所有气体转发给目标合同，还是只给出最低限度的气体津贴。它会促进重新进入攻击吗？

Answer 1

试一试再找出来？

contract TestInterface {
  function reentrance(address dest);
}

contract Test is TestInterface {
  uint8 private _depth = 0;

  // make it payable
  function () payable {}

  event Entered(uint8 depth);

  function reentrance(address dest) {
    if (_depth > 2) {
      // yep
      throw;
    }
    Entered(_depth);
    _depth++;
    dest.transfer(this.balance);
  }
}

contract Destination {
  function () payable {
    TestInterface sender = TestInterface(msg.sender);
    // send it back so we can do it again.
    msg.sender.send(this.balance);
    sender.reentrance(this);
  }
}

// deploy Test
// send Test some ETH
// Deploy Destination
// call Test.reentrance with Destination's address
// Watch for events from Test