made changes as asked

Author: 0xr10t

foundry.toml

@@ -2,7 +2,10 @@
 src = "src"
 out = "out"
 libs = ["lib"]
-remappings = ["@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts"]
+remappings = [
+    '@openzeppelin/contracts=lib/openzeppelin-contracts/contracts',
+    '@chainlink/contracts=lib/chainlink-brownie-contracts/contracts'
+]
 
 [invariant]
 runs=128

script/ HelperConfig.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.18;
+pragma solidity ^0.8.19;
 
 import {Script} from "lib/forge-std/src/Script.sol";
 import {MockV3Aggregator} from "../test/mocks/MockV3Aggregator.sol";
@@ -9,8 +9,7 @@ contract HelperConfig is Script {
     uint8 public constant DECIMALS = 8;
     int256 public constant ETH_USD_PRICE = 2000e8;
     int256 public constant BTC_USD_PRICE = 1000e8;
-    uint256 public constant DEFAULT_ANVIL_PRIVATE_KEY =
-        0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80;
+    uint256 public constant DEFAULT_ANVIL_PRIVATE_KEY = 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80;
 
     struct NetworkConfig {
         address wethUsdPriceFeed;
@@ -20,19 +19,19 @@ contract HelperConfig is Script {
         uint256 deployerKey;
     }
 
+    NetworkConfig public activeNetworkConfig;
+
     constructor() {
-        if (block.chainid == 11155111) {
+        if(block.chainid == 11155111){
             activeNetworkConfig = getSepoliaEthConfig();
-        } else {
+        } else{
             activeNetworkConfig = getOrCreateAnvilEthConfig();
         }
     }
 
-    NetworkConfig public activeNetworkConfig;
-
     function getSepoliaEthConfig() public view returns (NetworkConfig memory sepoliaNetworkConfig) {
         sepoliaNetworkConfig = NetworkConfig({
-            wethUsdPriceFeed: 0x694AA1769357215DE4FAC081bf1f309aDC325306, // ETH / USD
+            wethUsdPriceFeed: 0x694AA1769357215DE4FAC081bf1f309aDC325306, 
             wbtcUsdPriceFeed: 0x1b44F3514812d835EB1BDB0acB33d3fA3351Ee43,
             weth: 0xdd13E55209Fd76AfE204dBda4007C227904f0a81,
             wbtc: 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063,
@@ -41,7 +40,6 @@ contract HelperConfig is Script {
     }
 
     function getOrCreateAnvilEthConfig() public returns (NetworkConfig memory anvilNetworkConfig) {
-        // Check to see if we set an active network config
         if (activeNetworkConfig.wethUsdPriceFeed != address(0)) {
             return activeNetworkConfig;
         }
@@ -54,12 +52,12 @@ contract HelperConfig is Script {
         ERC20Mock wbtcMock = new ERC20Mock();
         vm.stopBroadcast();
 
-        return anvilNetworkConfig = NetworkConfig({
-            wethUsdPriceFeed: address(ethUsdPriceFeed), // ETH / USD
-            weth: address(wethMock),
-            wbtcUsdPriceFeed: address(btcUsdPriceFeed),
-            wbtc: address(wbtcMock),
-            deployerKey: DEFAULT_ANVIL_PRIVATE_KEY
+        anvilNetworkConfig = NetworkConfig({
+        wethUsdPriceFeed: address(ethUsdPriceFeed), 
+        weth: address(wethMock),
+        wbtcUsdPriceFeed: address(btcUsdPriceFeed),
+        wbtc: address(wbtcMock),
+        deployerKey: DEFAULT_ANVIL_PRIVATE_KEY
         });
     }
 }

script/DeployDSC.s.sol

@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.18;
+pragma solidity ^0.8.19;
 
 import {Script} from "lib/forge-std/src/Script.sol";
-import {DecentralizedStableCoin} from "src/DecentralisedStableCoin.sol";
+import {DecentralizedStableCoin} from "src/DecentralizedStableCoin.sol";
 import {DSCEngine} from "src/DSCEngine.sol";
 import {HelperConfig} from "../script/ HelperConfig.s.sol";
 
@@ -13,18 +13,12 @@ contract DeployDSC is Script {
     function run() external returns (DecentralizedStableCoin, DSCEngine, HelperConfig) {
         HelperConfig config = new HelperConfig();
 
-        (
-            address wethUsdPriceFeed,
-            address wbtcUsdPriceFeed,
-            address weth,
-            address wbtc,
-            // uint256 deployerKey
-        ) = config.activeNetworkConfig();
+        (address wethUsdPriceFeed, address wbtcUsdPriceFeed, address weth, address wbtc, uint256 deployerKey) = config.activeNetworkConfig();
 
         tokenAddresses = [weth, wbtc];
         priceFeedAddresses = [wethUsdPriceFeed, wbtcUsdPriceFeed];
 
-        vm.startBroadcast();
+        vm.startBroadcast(deployerKey);
         DecentralizedStableCoin dsc = new DecentralizedStableCoin();
         DSCEngine engine = new DSCEngine(tokenAddresses, priceFeedAddresses, address(dsc));
         dsc.transferOwnership(address(engine));