如何在 Solidity 中声明常量
How to declare constants in Solidity
我对 Solidity 和智能合约真的很陌生,非常感谢您的帮助。我正在学习教程,这是他们使用的确切代码。但是当我编译代码时出现这个错误:
ParserError:预期的主表达式。
地址 public 常量批准者 = ;
pragma solidity ^0.6.0;
contract ApprovalContract {
address public sender;
address public receiver;
address public constant approver = ;
function deposit(address _receiver) external payable {
require(msg.value > 0);
sender = msg.sender;
receiver = _receiver;
}
function viewApprover() external pure returns(address) {
return(approver);
}
function approve() external {
require(msg.sender == approver);
receiver.transfer(address(this).balance);
}
}
常量需要初始化
address public constant approver = YOURADDRESS;
我对 Solidity 和智能合约真的很陌生,非常感谢您的帮助。我正在学习教程,这是他们使用的确切代码。但是当我编译代码时出现这个错误:
ParserError:预期的主表达式。 地址 public 常量批准者 = ;
pragma solidity ^0.6.0;
contract ApprovalContract {
address public sender;
address public receiver;
address public constant approver = ;
function deposit(address _receiver) external payable {
require(msg.value > 0);
sender = msg.sender;
receiver = _receiver;
}
function viewApprover() external pure returns(address) {
return(approver);
}
function approve() external {
require(msg.sender == approver);
receiver.transfer(address(this).balance);
}
}
常量需要初始化
address public constant approver = YOURADDRESS;