dodo mysterybox

contracts/lib/RandomGenerator.sol

@@ -0,0 +1,34 @@
+/*
+
+    Copyright 2020 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+
+interface IRandomGenerator {
+    function random() external view returns (uint256);
+}
+
+interface IDODOMidPrice {
+    function getMidPrice() external view returns (uint256 midPrice);
+}
+
+contract RandomGenerator {
+    address[] internal pools;
+
+    constructor(address[] memory _pools) public {
+        for (uint256 i = 0; i < pools.length; i++) {
+            pools.push(_pools[i]);
+        }
+    }
+
+    function random() external view returns (uint256) {
+        uint256 priceSum;
+        for (uint256 i = 0; i < pools.length; i++) {
+            priceSum += IDODOMidPrice(pools[i]).getMidPrice();
+        }
+        return uint256(keccak256(abi.encodePacked(blockhash(block.number-1), priceSum)));
+    }
+}