交易雷电后交易执行失败

Question

我已经创建了智能合约并将其成功部署在geth服务器上，但是当我将使用智能合约发送以太币时，在交易被挖出后我将处于错误状态。

“发生了0x0事务，但执行失败。”

发送我的代码示例：

pragma solidity ^0.5.1; 
contract Send {

  event Sent(address from, address to, uint amount );

  function send(uint _amount) public payable{
      emit Sent(msg.sender, address(this), _amount);
  }

  function confirm(address payable _receiver, uint _amount) public {
      _receiver.transfer(_amount); 
     emit Sent(address(this), _receiver, _amount);
  }

  function getBalance() public view returns (uint256) {
    return address(this).balance;
 } 
}