bit of view function & tests

.prettierignore

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+node_modules
+package.json
+img
+artifacts
+cache
+coverage
+.env
+.*
+README.md
+coverage.json

.prettierrc

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+{
+    "tabWidth": 4,
+    "useTabs": false,
+    "semi": false,
+    "singleQuote": false
+}

README.md

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+
+Our Stablecoin Features 
+
+1. (Relative Stability) Anchored or Pegged -> $1.00
+    1. Chainlink Price Feed.
+    2. Set a function to exchnage ETH & BTC -> $$$.
+2. Stability Mechanism (Minting): Algorithmic (Decentralized)
+    1. Can only mint the StbaleCoin with enough collateral.
+3. Collateral: Exogenous (Crypto)
+    1. ETH ERC20 version wETH. 
+    2. BTC ERC20 version wBTC. 
+
+
+-> Calculate Health Factor Function 
+-> Set Health Factor if dept is 0
+-> Added a bunch of view Function
+
+1. What are our invariants/properties? 

foundry.toml

@@ -2,5 +2,6 @@
 src = "src"
 out = "out"
 libs = ["lib"]
+remappings = ['@chainlink/contracts/=lib/chainlink-brownie-contracts/contracts/', '@openzeppelin/contracts=lib/openzeppelin-contracts/contracts']
 
 # See more config options https://github.com/foundry-rs/foundry/tree/master/config

script/DeployDSC.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+import {Script} from "forge-std/Script.sol";
+import {DecentralizedStableCoin} from "../src/DecentralizedStableCoin.sol";
+import {DSCEngine} from "../src/DSCEngine.sol";
+import {HelperConfig} from "../script/HelperConfig.s.sol";
+
+contract DeployDSC is Script {
+    // function setUp() public {}
+
+    address[] public tokenAddresses;
+    address[] public priceFeedAddresses;
+
+    function run() external returns (DecentralizedStableCoin, DSCEngine, HelperConfig) {
+        HelperConfig config = new HelperConfig();
+
+        (address wethUsdPriceFeed, address wbtcUsdPriceFeed, address weth, address wbtc, uint256 depployerKey) = config.activeNetworkConfig();
+
+        tokenAddresses = [weth, wbtc];
+        priceFeedAddresses = [wethUsdPriceFeed, wbtcUsdPriceFeed];
+
+        vm.startBroadcast(depployerKey);
+        DecentralizedStableCoin dsc = new DecentralizedStableCoin();
+        DSCEngine engine = new DSCEngine(tokenAddresses, priceFeedAddresses, address(dsc));
+
+        dsc.transferOwnership(address(engine));
+
+        vm.stopBroadcast();
+
+        return (dsc, engine, config);
+    }
+}

script/HelperConfig.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+import {Script} from "forge-std/Script.sol";
+import {MockV3Aggregator} from "../test/mocks/MockV3Aggregator.sol";
+import {ERC20Mock} from "@openzeppelin/contracts/mocks/ERC20Mock.sol";
+
+contract HelperConfig is Script {
+    struct NetworkConfig {
+        address wethUsdPriceFeed;
+        address wbtcUsdPriceFeed;
+        address weth;
+        address wbtc;
+        uint256 deployerKey;
+    }
+
+    uint8 public constant DECIMALS = 8;
+    int256 public constant ETH_USD_PRICE = 2000e8;
+    int256 public constant BTC_USD_PRICE = 1000e8;
+    uint256 public DEFAULT_ANVIL_KEY = 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80; 
+
+    NetworkConfig public activeNetworkConfig;
+
+    constructor() {
+        if (block.chainid == 11155111){
+            activeNetworkConfig = getSepoliaEthConfig();
+        } else {
+            activeNetworkConfig = getOrCreateAnvilEthConfig();
+        }
+    }
+
+    function getSepoliaEthConfig() public view returns (NetworkConfig memory) {
+        return NetworkConfig({
+            wethUsdPriceFeed: 0x694AA1769357215DE4FAC081bf1f309aDC325306,
+            wbtcUsdPriceFeed: 0x1b44F3514812d835EB1BDB0acB33d3fA3351Ee43,
+            weth: 0xdd13E55209Fd76AfE204dBda4007C227904f0a81,
+            wbtc: 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063,
+            deployerKey: vm.envUint("PRIVATE_KEY")
+        });
+    }
+
+    function getOrCreateAnvilEthConfig() public returns (NetworkConfig memory) {
+        if (activeNetworkConfig.wethUsdPriceFeed != address(0)) {
+            return activeNetworkConfig;
+        }
+
+        vm.startBroadcast();
+        MockV3Aggregator ethUsdPriceFeed = new MockV3Aggregator(DECIMALS, ETH_USD_PRICE);
+
+        ERC20Mock wethMock = new ERC20Mock("WETH", "WETH", msg.sender, 1000e8);
+
+        MockV3Aggregator btcUsdPriceFeed = new MockV3Aggregator(DECIMALS, BTC_USD_PRICE);
+
+        ERC20Mock wbtcMock = new ERC20Mock("WBTC", "WBTC", msg.sender, 1000e8);
+
+        vm.stopBroadcast();
+
+        return NetworkConfig({
+            wethUsdPriceFeed: address(ethUsdPriceFeed),
+            wbtcUsdPriceFeed: address(btcUsdPriceFeed),
+            weth: address(wethMock),
+            wbtc: address(wbtcMock),
+            deployerKey: DEFAULT_ANVIL_KEY
+        });
+    }
+}