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标题: 智能合约：锁定5枚以太币，2065年见 [打印本页]

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作者: tup63304dmv    时间: 2017-11-24 21:59
标题: 智能合约：锁定5枚以太币，2065年见
智能合约：锁定5枚以太币，2065年见
这个哥们挺有意思，写了个智能合同，把5枚以太币，锁定了50年，预计2065年释放出来。结果后来给人找到了bug，结果他自已提出来后，修复了bug，然后又存进去了。


代码如下：

• //0xdb30622d51e8d6221f0b1cbde57d4734387d7ca1
  
• contract Locker {
  
• 
  
• mapping(address => mapping(uint => uint)) locker;
  
• 
  
• event Locked(address indexed _addr, uint _timestamp, uint _value);
  
• event Withdrew(address indexed _addr, uint _timestamp, uint _value);
  
• 
  
• function lockUntil(uint _timestamp) returns (bool _success) {
  
• if(_timestamp > now) { //only lock into the future.
  
• locker[msg.sender][_timestamp] += msg.value;
  
• Locked(msg.sender, _timestamp, msg.value);
  
• return true;
  
• } else {
  
• msg.sender.send(msg.value); //send back. Perhaps replace with exception?
  
• return false;
  
• }
  
• }
  
• 
  
• function withdrawAtTimestamp(uint _timestamp) returns (bool _success) {
  
• //you can set an arb timestamp into the past & thus will return true
  
• //but doesn't help since you can only set timestamps into the future.
  
• if(now >= _timestamp && locker[msg.sender][_timestamp] > 0) {
  
• msg.sender.send(locker[msg.sender][_timestamp]);
  
• locker[msg.sender][_timestamp] = 0;
  
• Withdrew(msg.sender, _timestamp, locker[msg.sender][_timestamp]);
  
• return true;
  
• } else {
  
• return false;
  
• }
  
• }}
  

复制代码
来源：https://gist.github.com/simondlr/627400ade47dcd822e18

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