如何使用智能契约在ethereum中部署另一个智能契约？

Question

因为我有一个带有重入漏洞的测试合同，所以我想复制它。但是，只有当部署人员是重入攻击契约时，才能再现此漏洞。其守则如下：

contract Forwarder {
  // Address to which any funds sent to this contract will be forwarded
  address public parentAddress;
  event ForwarderDeposited(address from, uint value, bytes data);

  event TokensFlushed(
    address tokenContractAddress, // The contract address of the token
    uint value // Amount of token sent
  );

  /**
   * Create the contract, and set the destination address to that of the creator
   */
  function Forwarder() {
    parentAddress = msg.sender;
  }

  /**
   * Modifier that will execute internal code block only if the sender is a parent of the forwarder contract
   */
  modifier onlyParent {
    if (msg.sender != parentAddress) {
      throw;
    }
    _;
  }

  /**
   * Default function; Gets called when Ether is deposited and forwards it to the destination address
   */
  function() payable {
    if (**!parentAddress.call.value(msg.value**)(msg.data))
      throw;
    // Fire off the deposited event if we can forward it  
    ForwarderDeposited(msg.sender, msg.value, msg.data);
  }
}

因此，第一步是使用可以利用漏洞部署此易受攻击契约的契约，我如何使用智能契约来部署另一个契约，特别是通过Remix？

Answer 1

你可以这样做：

pragma solidity ^0.6.0;
import './Forwarder.sol';

contract SelfDeploy{
        
    event Addr(address);
    
    function getnewaddress() public returns (uint){
       emit Addr(address(new Forwarder()));
    }
}

在成功的事务处理之后，您可以检查以太扫描，也可以让侦听器获取转发器的地址。