update numbergame bapp

numbergame/contracts/Game.sol

@@ -0,0 +1,57 @@
+pragma solidity >=0.4.24 <=0.5.6;
+
+contract Ownable {
+  address owner;
+  constructor() public {
+    owner = msg.sender;
+  }
+
+  modifier Owned {
+    require(msg.sender == owner);
+    _;
+  }
+}
+
+contract Mortal is Ownable {
+  function kill() public Owned { 
+    selfdestruct(msg.sender);
+  }
+}
+
+
+contract Game is Mortal {
+  uint minBet; // 최소 베팅액  
+
+  event Won(bool _result, uint _amount);
+
+  constructor(uint _minBet) payable public {
+    require(_minBet > 0);    
+    minBet = _minBet;    
+  }
+
+  function() external { 
+    revert();
+  }
+
+  function play(uint _num) payable public {
+    require(_num > 0 && _num <= 5);
+    require(msg.value >= minBet);
+
+    uint winNum = random();
+    if (_num == winNum) {
+      uint amtWon = msg.value * 2;
+      if(!msg.sender.send(amtWon)) revert();
+      emit Won(true, amtWon);
+    } else {
+      emit Won(false, 0);
+    }
+  }
+
+  function getBalance() Owned public view returns(uint) {
+    return address(this).balance;
+  }
+
+  function random() public view returns (uint) {
+    return uint(keccak256(abi.encodePacked(now, msg.sender))) % 5 + 1;
+  }
+}