Solidity 地址类型，balance余额，sender调用者，this合约地址，transfer、send转账

墨蓝 2022-02-25 04:50 353阅读 0赞

**demo.sol（地址类型与整型转换）：**

pragma solidity ^0.4.20;
    
    
    contract AddressTest {
        address _add1 = 0x4b0897b0513fdc7c541b6d9d7e929c4e5364d2db;  // 地址类型
        address _add2 = 0x583031d1113ad414f02576bd6afabfb302140225;
        uint160 public _num = 0;
        address public _add;
    
        function address2uint160() public returns(uint160){
            _num = uint160(_add1);   // 地址类型->整型类型
            return _num;
        }
        
        
        function uint160ToAddress() public returns(address){
            _add = address(_num);   // 整型类型->地址类型
            return _add;
        }
        
        function comAddress() constant public returns(bool){
            return _add1 == _add2;
        }
        
        function isGreater() constant public returns(bool){
            return _add1 > _add2;
        }
    }

**demo.sol（balance属性，获取地址余额）：**

pragma solidity ^0.4.20;
    
    contract addressBalance {
    
        function getBalance(address addr) constant public returns (uint){
            return addr.balance;   // balance属性(余额)
        }
    }

**demo.sol（sender属性，获取消息发起人地址）：**

pragma solidity ^0.4.20;
    
    
    contract senderTest {
        address public _owner;
        
        constructor() public {
            _owner = msg.sender;
        }
        
        function getInvoker() constant public returns (address){
            return msg.sender;  // sender 获取部署合约或调用合约的用户地址
        }
        
        function getOwnerBalance() constant public returns (uint256){
            return msg.sender.balance;
        }
        
    }

**demo.sol（this，合约地址）：**

pragma solidity ^0.4.20;
    
    
    contract addressThis {
        
        uint _money;
        
        // 构造函数
        constructor() payable public {  // payable 表示合约地址可以接收转账
            _money = msg.value;  // 获取转给合约地址的金额
        }
        
        function getThis() constant public returns (address){
            return this;   // this 指向合约地址的指针（合约本身）
        }
        
        function getBalance () constant public returns (uint256){
            return this.balance;  // 获取合约地址的余额
        }
        
        function getMoney() constant public returns(uint){
            return _money;
        }
        
    }

**demo.sol（transfer，转账）：**

pragma solidity ^0.4.20;
    
    
    contract TranferTest {
        
        address AliceAddress = 0xa446742e4845CFbA8EC7d93226eE6ceB6C7C91ab;
        
        function transfer() payable public {
            AliceAddress.transfer(msg.value);  // transfer 转账。 调用者转给AliceAddress
        }
    }

**demo.sol（send，转账）：**

pragma solidity ^0.4.20;
    
    
    contract TranferTest {
        
        address AliceAddress = 0xa446742e4845CFbA8EC7d93226eE6ceB6C7C91ab;
        bool res;
        
        function transfer() payable public returns (bool){
            res = AliceAddress.send(msg.value);   // 转账(类似transfer)，返回bool类型。（转给AliceAddress）
            return res;
        }
    }

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