FIL2合约代码解析之FILLocked

    FILLocked合约地址为：0x1cd2647aAf1Bb5c0f6FC89a2e6C9af59E8C11982，该合约目前已经进行开源，并且丢弃管理权限。

    该合约的主要功能是与FIL2Control合约进行交互，在用户铸造FIL2时，将总量30%的FIL在合约中进行封存，记录当前价格，同时记录用户的地址与区块高度建立并索引关系，当达到规定条件以后，用户可以通过withdraw功能从合约中解锁。用户可以通过浏览器对FILLocked合约进行操作，登陆Metamask以后，可以通过Read和Write功能对自己的账户进行操作。

 

    以下是关于FILLocked核心功能解析

1: 基本参数:

一年的区块数量:uint256 year = 20*60*24*365;                  

合约总封存数量:uint256 public lockedAmount ;

2:封存对象

         struct Locked {                         

        address useraddress;                 

        uint256 depositNumber;               

        uint256 amount;                      

        uint256 price;                       

        uint256 withdrawNumber;              

        uint256 withdrawedNumber;            

}

3:设置价格参数地址

         function setFilPriceAddr(address _filPriceAddr) public returns (bool) {

        require(isAuthListed[msg.sender]==true,”Unauthorized operation account”);

        filPriceAddr = _filPriceAddr;

        return true;

    }

4:查询我的质押

        function getMyDeposits(uint256 blockNumber)public view returns(Locked memory){

        string memory indexs=getAddNumberStr(msg.sender, blockNumber);

        Locked memory lock=  deposits[indexs];

        return lock;

    }

5: 解除封存

        function  withdraw(uint blockNumber)public  returns(bool){

        IERC20  filCoin = IERC20(filAddress);

        string memory indexs=getAddNumberStr(msg.sender, blockNumber);

//查询封存数据

        Locked  memory lock=  deposits[getAddNumberStr(msg.sender, blockNumber)];       

//如果余额为0,说明已经解锁  

        require(lock.amount>0,”The balance is 0, and this pledge has been withdrawn”);            

//提现解锁条件

        require((block.number > lock.withdrawNumber||price > lock.price*35/10),”Pledge not yet due”);          //365days or 3.5price

//修改解锁数据

        uint256 amount= lock.amount;

//用户提现后，锁仓余额修改为0

        lock.amount=0;       

 //标注提现区块高度                

        lock.withdrawedNumber=block.number;   

        deposits[indexs]=lock;

 //解锁

        filCoin.transfer(msg.sender,amount);

//修改总封存数量

        lockedAmount=lockedAmount-amount;       

        return true;     

    }

6: 封存

        function deposit(address user,uint amount) public returns (bool) {

        require(isAuthListed[msg.sender]==true,”Unauthorized operation account”);

  //记录封存用户地址

        locked.useraddress=user;    

 //记录封存时间                       

        locked.depositNumber=block.number;                

//记录封存数量      

        locked.amount=amount;       

//记录最早解锁区块高度

        locked.withdrawNumber=block.number+year;        

        deposits[getAddNumberStr(user, block.number)]=locked;

//增加封存总数量       

        lockedAmount=lockedAmount+amount;                    

        return true;

    }

7: 组装索引

     function getAddNumberStr(address sender,uint256 blockNumber) private pure returns( string memory){

        return  string(abi.encodePacked(Strings.toHexString(uint160(sender), 20),”-“,Strings.toString(blockNumber)));

} 

8:获取余额

        function getTokenBalance(address contractAddress, address accountAddress) private view returns (uint256) {

        ERC20 ercToken = ERC20(contractAddress);

        return ercToken.balanceOf(accountAddress);

    }

 以上就是FILLocked的主要功能，在接下来的文章中，我们将逐一分析FIL2的其他合约，共同验证FIL2如何通过开源技术保证资金的安全和规则的公平。