Initial commit

.gitignore

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+node_modules
+.env
+coverage
+coverage.json
+typechain
+
+#Hardhat files
+cache
+artifacts

contracts/BetVault.sol

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+//SPDX-License-Identifier: Unlicense
+pragma solidity ^0.8.0;
+
+// import "hardhat/console.sol";
+import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
+
+contract BetVault {
+
+    struct Bet {
+        bool active;
+        uint256 bidPrice;
+        uint256 bidCollateral;
+    }
+
+    address public assetAddr;
+    AggregatorV3Interface internal priceFeed;
+    uint256 public biddingTimeEnd;
+    uint256 public endTime;
+
+    mapping(address => Bet) public bets;
+    address[] public bidders;
+
+    constructor(address _assetAddr, address _priceFeed, uint256 _biddingTimeEnd, uint256 _endTime) {
+        require(_biddingTimeEnd <= _endTime, "Bidding time must be before whole bid ends");
+        require(_biddingTimeEnd > block.timestamp, "Bidding must end after now");
+        assetAddr = _assetAddr;
+        biddingTimeEnd = _biddingTimeEnd;
+        endTime = _endTime;
+        priceFeed = AggregatorV3Interface(_priceFeed);
+    }
+
+    function placeBid(uint256 _bidPrice) external payable {
+        require(bets[msg.sender].active == false, "Already placed a bid");
+        require(block.timestamp < biddingTimeEnd, "Too late to place a bid");
+        bets[msg.sender] = Bet(true, _bidPrice, msg.value);
+        bidders.push(msg.sender);
+    }
+}

hardhat.config.js

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+require("@nomiclabs/hardhat-waffle");
+
+// This is a sample Hardhat task. To learn how to create your own go to
+// https://hardhat.org/guides/create-task.html
+task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
+  const accounts = await hre.ethers.getSigners();
+
+  for (const account of accounts) {
+    console.log(account.address);
+  }
+});
+
+// You need to export an object to set up your config
+// Go to https://hardhat.org/config/ to learn more
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+module.exports = {
+  solidity: "0.8.4",
+};