update numbergame bapp

numbergame/contracts/Game.sol

@@ -1,8 +1,8 @@
-pragma solidity ^0.4.18;
+pragma solidity >=0.4.24 <=0.5.6;
 
 contract Ownable {
   address owner;
-  function Ownable() public {
+  constructor() public {
     owner = msg.sender;
   }
 
@@ -14,39 +14,36 @@ contract Ownable {
 
 contract Mortal is Ownable {
   function kill() public Owned { 
-    selfdestruct(owner);
+    selfdestruct(msg.sender);
   }
 }
 
 
-contract Betting is Mortal {
-  uint minBet; // 최소 베팅액
-  uint winRate; // 배당률 (%)
+contract Game is Mortal {
+  uint minBet; // 최소 베팅액  
 
   event Won(bool _result, uint _amount);
 
-  function Betting(uint _minBet, uint _winRate) payable public {
-    require(_minBet > 0);
-    require(_winRate <= 100);
-    minBet = _minBet;
-    winRate = _winRate;
+  constructor(uint _minBet) payable public {
+    require(_minBet > 0);    
+    minBet = _minBet;    
   }
 
-  function() public { 
+  function() external { 
     revert();
   }
 
-  function bet(uint _num) payable public {
+  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 * (100 - winRate)/10;
+      uint amtWon = msg.value * 2;
       if(!msg.sender.send(amtWon)) revert();
-      Won(true, amtWon);
+      emit Won(true, amtWon);
     } else {
-      Won(false, 0);
+      emit Won(false, 0);
     }
   }
 
@@ -55,7 +52,6 @@ contract Betting is Mortal {
   }
 
   function random() public view returns (uint) {
-  	return uint(keccak256(block.difficulty, block.number, now)) % 5 + 1;
+    return uint(keccak256(abi.encodePacked(now, msg.sender))) % 5 + 1;
   }
-}
-
+}