无法将整个合同金额可靠地发送到账户

Question

我创建了一个彩票合约，我将所有参与的玩家存储在一个地址数组中我在将我的合同资金转移给赢家时遇到错误，即功能赢家另一个错误是将哈希值转换为 uint

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.11;

contract lottery
{
  address manager;
  address[] public players;

  function setManager() public{
      manager = msg.sender;
  }
  function enterLottery () public payable{
    require(msg.value > 0.9 ether);
    players.push(msg.sender); 
  }
function random() private view returns(uint){
     return uint(keccak256(block.difficulty,block.timestamp,players));
  }
  function winner() public payable{
      uint index = random() % players.length;
      players[index].send(address(this).balance);
      players = new address[](0);
  }
}

Answer 1

我运行把你的代码remix和注释掉就行了。现在编译成功:

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.11;

contract lottery
{
  address manager;
  // send and transfer are only available for objects of type "address payable"
//   address[] public players;
    address payable[]  public players;


  function setManager() public{
      manager = msg.sender;
  }
  function enterLottery () public payable{
    require(msg.value > 0.9 ether);
    // msg.sender was payable before version 8. we have to explicitly set it as payable
    players.push(payable(msg.sender)); 
  }
function random() private view returns(uint){
    // Wrong argument count for function call:3 arguments given but expected 1. this function requires a single byte argument
    //  return uint(keccak256(block.difficulty,block.timestamp,players));
    return uint(keccak256(abi.encodePacked(block.difficulty,block.timestamp)));   
  }

  function winner() public payable{
      uint index = random() % players.length;
      // Failurer condition of 'send' is ignored. Consider using 'transfer' instead
    //   players[index].send(address(this).balance);
    players[index].transfer(address(this).balance);
    // type address[] memory is not implicitly convertible to expected type address payable[] storage ref
    //   players = new address[](0);
    players = new address payable[](0);

  }
}

无法将整个合同金额可靠地发送到账户

cannot send entire contract amount to account in solidity

blockchain

ethereum

solidity

smartcontracts

web3