init

numbergame/contracts/Betting.sol

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+pragma solidity ^0.4.18;
+
+contract Ownable {
+  address owner;
+  function Ownable() public {
+    owner = msg.sender;
+  }
+
+  modifier Owned {
+    require(msg.sender == owner);
+    _;
+  }
+}
+
+contract Mortal is Ownable {
+  function kill() public Owned { 
+    selfdestruct(owner);
+  }
+}
+
+
+contract Betting is Mortal {
+  uint minBet; // 최소 베팅액
+  uint winRate; // 배당률 (%)
+
+  event Won(bool _result, uint _amount);
+
+  function Betting(uint _minBet, uint _winRate) payable public {
+    require(_minBet > 0);
+    require(_winRate <= 100);
+    minBet = _minBet;
+    winRate = _winRate;
+  }
+
+  function() public { 
+    revert();
+  }
+
+  function bet(uint _num) payable public {
+    require(_num > 0 && _num <= 5);
+    require(msg.value >= minBet);
+
+    uint winNum = random();
+    if (_num == winNum) {
+      uint amtWon = msg.value * (100 - winRate)/10;
+      if(!msg.sender.send(amtWon)) revert();
+      Won(true, amtWon);
+    } else {
+      Won(false, 0);
+    }
+  }
+
+  function getBalance() Owned public view returns(uint) {
+    return address(this).balance;
+  }
+
+  function random() public view returns (uint) {
+  	return uint(keccak256(block.difficulty, block.number, now)) % 5 + 1;
+  }
+}
+