Added link price feed integration

packages/hardhat/contracts/PriceConsumerV3.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.9;
+
+import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
+
+contract PriceConsumer {
+
+    AggregatorV3Interface internal priceFeed;
+
+    /**
+     * Network: Rinkeby
+     * Aggregator: LINK/USD
+     * Address: 0xd8bD0a1cB028a31AA859A21A3758685a95dE4623
+     */
+    constructor() {
+        priceFeed = AggregatorV3Interface(0xd8bD0a1cB028a31AA859A21A3758685a95dE4623);
+    }
+
+    /**
+     * Returns the latest price
+     */
+    function getLatestPrice() public view returns (int) {
+        (
+            uint80 roundID, 
+            int price,
+            uint startedAt,
+            uint timeStamp,
+            uint80 answeredInRound
+        ) = priceFeed.latestRoundData();
+        return price;
+    }
+}

packages/hardhat/deploy/00_deploy_your_contract.js

@@ -6,18 +6,22 @@ module.exports = async ({ getNamedAccounts, getChainId, deployments }) => {
   const frontendAddress = process.env.FRONTENDADDRESS;
   const receiverAddress = process.env.RECEIVERADDRESS;
 
-
   const { deploy } = deployments;
   const { deployer } = await getNamedAccounts();
   const chainId = await getChainId();
   const deployerWallet = ethers.provider.getSigner();
 
   const confirmationRequirement = chainId === "31337" ? 1 : 3;
 
+  console.log("Deployer Address: ", deployer);
+
   await deploy("MoonSwap", {
-    // Learn more about args here: https://www.npmjs.com/package/hardhat-deploy#deploymentsdeploy
     from: deployer,
-    // args: [ "Hello", ethers.utils.parseEther("1.5") ],
+    log: true,
+  });
+
+  await deploy("PriceConsumer", {
+    from: deployer,
     log: true,
   });
 
@@ -81,4 +85,4 @@ module.exports = async ({ getNamedAccounts, getChainId, deployments }) => {
     });
   }
 };
-module.exports.tags = ["MoonSwapV1"];
+module.exports.tags = ["MoonSwapV1", "PriceConsumerV3"];

packages/hardhat/package.json

@@ -12,6 +12,7 @@
     "eslint-plugin-prettier": "^3.4.0"
   },
   "dependencies": {
+    "@chainlink/contracts": "^0.2.2",
     "@eth-optimism/hardhat-ovm": "^0.2.2",
     "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers",
     "@nomiclabs/hardhat-waffle": "^2.0.0",