Error pr

.github/ISSUE_TEMPLATE/challenge_request.md

@@ -0,0 +1,17 @@
+---
+name: Challenge request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your challenge request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the challenge you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.gitignore

@@ -38,6 +38,7 @@ build
 .yarn/cache
 .yarn/install-state.gz
 .yarn/build-state.yml
+yarn.lock
 .eslintcache
 # testing
 coverage

README.md

@@ -14,28 +14,29 @@ Prerequisites: [Node](https://nodejs.org/en/download/) plus [Yarn](https://class
 > clone/fork 🏗 scaffold-eth:
 
 ```bash
-git clone https://github.com/austintgriffith/scaffold-eth.git
+git clone https://github.com/scaffold-eth/scaffold-eth-challenges.git challenge-4-oracle
 ```
 
 > install and start your 👷‍ Hardhat chain:
 
 ```bash
-cd scaffold-eth
+cd challenge-4-oracle
+git checkout challenge-4-oracle
 yarn install
 yarn chain
 ```
 
 > in a second terminal window, start your 📱 frontend:
 
 ```bash
-cd scaffold-eth
+cd challenge-4-oracle
 yarn start
 ```
 
 > in a third terminal window, 🛰 deploy your contract:
 
 ```bash
-cd scaffold-eth
+cd challenge-4-oracle
 yarn deploy
 ```
 

packages/hardhat/contracts/EthPriceFeed.sol

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.4;
+
+import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
+
+contract PriceConsumerV3 {
+
+    AggregatorV3Interface internal priceFeed;
+
+    /**
+     * Network: Kovan
+     * Aggregator: ETH/USD
+     * Address: 0x9326BFA02ADD2366b30bacB125260Af641031331
+     */
+    constructor() {
+        priceFeed = AggregatorV3Interface(0x9326BFA02ADD2366b30bacB125260Af641031331);
+    }
+
+    /**
+     * 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

@@ -10,55 +10,61 @@ module.exports = async ({ getNamedAccounts, deployments, getChainId }) => {
   const chainId = await getChainId();
 
   await deploy("YourContract", {
-    // Learn more about args here: https://www.npmjs.com/package/hardhat-deploy#deploymentsdeploy
     from: deployer,
-    // args: [ "Hello", ethers.utils.parseEther("1.5") ],
     log: true,
   });
 
+  // Uncomment to deploy your price feed on kovan
+  // await deploy("EthPriceFeed", {
+  //   from: deployer,
+  //   log: true,
+  // });
+
   // Getting a previously deployed contract
   const YourContract = await ethers.getContract("YourContract", deployer);
-  /*  await YourContract.setPurpose("Hello");
-
-    To take ownership of yourContract using the ownable library uncomment next line and add the 
-    address you want to be the owner. 
-    // yourContract.transferOwnership(YOUR_ADDRESS_HERE);
+  // const EthPriceFeedContract = await ethers.getContract(
+  //   "EthPriceFeed",
+  //   deployer
+  // );
 
-    //const yourContract = await ethers.getContractAt('YourContract', "0xaAC799eC2d00C013f1F11c37E654e59B0429DF6A") //<-- if you want to instantiate a version of a contract at a specific address!
-  */
+  // await YourContract.setPurpose("Hello");
 
-  /*
-  //If you want to send value to an address from the deployer
-  const deployerWallet = ethers.provider.getSigner()
-  await deployerWallet.sendTransaction({
-    to: "0x34aA3F359A9D614239015126635CE7732c18fDF3",
-    value: ethers.utils.parseEther("0.001")
-  })
-  */
+  // To take ownership of yourContract using the ownable library uncomment next line and add the
+  // address you want to be the owner.
+  // yourContract.transferOwnership(YOUR_ADDRESS_HERE);
 
-  /*
-  //If you want to send some ETH to a contract on deploy (make your constructor payable!)
-  const yourContract = await deploy("YourContract", [], {
-  value: ethers.utils.parseEther("0.05")
-  });
-  */
+  // if you want to instantiate a version of a contract at a specific address!
+  // const yourContract = await ethers.getContractAt('YourContract', "0xaAC799eC2d00C013f1F11c37E654e59B0429DF6A");
 
-  /*
-  //If you want to link a library into your contract:
-  // reference: https://github.com/austintgriffith/scaffold-eth/blob/using-libraries-example/packages/hardhat/scripts/deploy.js#L19
-  const yourContract = await deploy("YourContract", [], {}, {
-   LibraryName: **LibraryAddress**
-  });
-  */
+  // If you want to send value to an address from the deployer
+  // const deployerWallet = ethers.provider.getSigner()
+  // await deployerWallet.sendTransaction({
+  //   to: "0x34aA3F359A9D614239015126635CE7732c18fDF3",
+  //   value: ethers.utils.parseEther("0.001")
+  // })
+
+  // If you want to send some ETH to a contract on deploy (make your constructor payable!);
+  // const yourContract = await deploy("YourContract", [], {
+  // value: ethers.utils.parseEther("0.05")
+  // });
+
+  // If you want to link a library into your contract:
+  // const yourContract = await deploy("YourContract", [], {}, {
+  //  LibraryName: **LibraryAddress**
+  // });
 
   // Verify your contracts with Etherscan
   // You don't want to verify on localhost
   if (chainId !== localChainId) {
-    await run("verify:verify", {
+    run("verify:verify", {
       address: YourContract.address,
       contract: "contracts/YourContract.sol:YourContract",
       contractArguments: [],
     });
+
+    // Add verification for your price feed contract here
+    // ...
   }
 };
-module.exports.tags = ["YourContract"];
+
+module.exports.tags = ["YourContract", "EthPriceFeed"];

packages/hardhat/example.env

@@ -8,29 +8,36 @@
 # Infura endpoints should be passed in WITHOUT the rest of the url
 # Private keys should be pasted WITHOUT the 0x prefix
 
+# Moralis Key(s)
+MORALIS_SERVER=
+MORALIS_SECRET=
+
 # Example
-EXAMPLE_INFURA_KEY=582dabbadbeef8...
-EXAMPLE_DEPLOYER_PRIV_KEY=deadbeef01EEdf972aBB...
+EXAMPLE_INFURA_KEY=7b0e75d38d424750b92791477924d133
+EXAMPLE_DEPLOYER_PRIV_KEY=deadbeef01EEdf972aBB ...
 
 # Rinkeby
-RINKEBY_INFURA_KEY=
+RINKEBY_INFURA_KEY=7b0e75d38d424750b92791477924d133
 RINKEBY_DEPLOYER_PRIV_KEY=
 
 # Kovan
-KOVAN_INFURA_KEY=
+KOVAN_INFURA_KEY=7b0e75d38d424750b92791477924d133
 KOVAN_DEPLOYER_PRIV_KEY=
 
 # mainnet
-MAINNET_INFURA_KEY=
+MAINNET_INFURA_KEY=7b0e75d38d424750b92791477924d133
 MAINNET_DEPLOYER_PRIV_KEY=
 
 # Ropsten
-ROPSTEN_INFURA_KEY=
+ROPSTEN_INFURA_KEY=7b0e75d38d424750b92791477924d133
 ROPSTEN_DEPLOYER_PRIV_KEY=
 
 # Goerli
-GOERLI_INFURA_KEY=
+GOERLI_INFURA_KEY=7b0e75d38d424750b92791477924d133
 GOERLI_DEPLOYER_PRIV_KEY=
 
 # xDai
-XDAI_DEPLOYER_PRIV_KEY=
+XDAI_DEPLOYER_PRIV_KEY=
+
+# CoinMarketCap
+COINMARKETCAP=

packages/hardhat/hardhat.config.js

@@ -15,21 +15,10 @@ require("@nomiclabs/hardhat-etherscan");
 
 const { isAddress, getAddress, formatUnits, parseUnits } = utils;
 
-/*
-      📡 This is where you configure your deploy configuration for 🏗 scaffold-eth
-
-      check out `packages/scripts/deploy.js` to customize your deployment
-
-      out of the box it will auto deploy anything in the `contracts` folder and named *.sol
-      plus it will use *.args for constructor args
-*/
-
-//
 // Select the network you want to deploy to here:
-//
-const defaultNetwork = "localhost";
+const defaultNetwork = "kovan";
 
-const mainnetGwei = 21;
+const mainnetGwei = 115;
 
 function mnemonic() {
   try {
@@ -67,81 +56,41 @@ module.exports = {
   networks: {
     localhost: {
       url: "http://localhost:8545",
-      /*      
-        notice no mnemonic here? it will just use account 0 of the hardhat node to deploy
-        (you can put in a mnemonic here to set the deployer locally)
-
-      */
+      // notice no mnemonic here? it will just use account 0 of the hardhat node to deploy
+      // (you can put in a mnemonic here to set the deployer locally)
     },
-
-    // rinkeby: {
-    //   url: `https://rinkeby.infura.io/v3/${process.env.RINKEBY_INFURA_KEY}`,
-    //   accounts: [`${process.env.RINKEBY_DEPLOYER_PRIV_KEY}`],
-    // },
-    // kovan: {
-    //   url: `https://rinkeby.infura.io/v3/${process.env.KOVAN_INFURA_KEY}`,
-    //   accounts: [`${process.env.KOVAN_DEPLOYER_PRIV_KEY}`],
-    // },
-    // mainnet: {
-    //   url: `https://mainnet.infura.io/v3/${process.env.MAINNET_INFURA_KEY}`,
-    //   accounts: [`${process.env.MAINNET_DEPLOYER_PRIV_KEY}`],
-    // },
-    // ropsten: {
-    //   url: `https://ropsten.infura.io/v3/${process.env.ROPSTEN_INFURA_KEY}`,
-    //   accounts: [`${process.env.ROPSTEN_DEPLOYER_PRIV_KEY}`],
-    // },
-    // goerli: {
-    //   url: `https://goerli.infura.io/v3/${process.env.GOERLI_INFURA_KEY}`,
-    //   accounts: [`${process.env.GOERLI_DEPLOYER_PRIV_KEY}`],
-    // },
-    // xdai: {
-    //   url: 'https://dai.poa.network',
-    //   gasPrice: 1000000000,
-    //   accounts: [`${process.env.XDAI_DEPLOYER_PRIV_KEY}`],
-    // },
-
     rinkeby: {
-      url: "https://rinkeby.infura.io/v3/460f40a260564ac4a4f4b3fffb032dad", // <---- YOUR INFURA ID! (or it won't work)
-
+      url: "https://rinkeby.infura.io/v3/XXXXXXXXXXXXXXXXXXXXXXX", // <---- YOUR INFURA ID! (or it won't work)
       //    url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXX/eth/rinkeby", // <---- YOUR MORALIS ID! (not limited to infura)
-
       accounts: {
         mnemonic: mnemonic(),
       },
     },
     kovan: {
-      url: "https://kovan.infura.io/v3/460f40a260564ac4a4f4b3fffb032dad", // <---- YOUR INFURA ID! (or it won't work)
-
+      url: "https://kovan.infura.io/v3/XXXXXXXXXXXXXXXXXXXXXXX", // <---- YOUR INFURA ID! (or it won't work)
       //    url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXX/eth/kovan", // <---- YOUR MORALIS ID! (not limited to infura)
-
       accounts: {
         mnemonic: mnemonic(),
       },
     },
     mainnet: {
-      url: "https://mainnet.infura.io/v3/460f40a260564ac4a4f4b3fffb032dad", // <---- YOUR INFURA ID! (or it won't work)
-
+      url: "https://mainnet.infura.io/v3/XXXXXXXXXXXXXXXXXXXXXXX", // <---- YOUR INFURA ID! (or it won't work)
       //      url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXXXX/eth/mainnet", // <---- YOUR MORALIS ID! (not limited to infura)
-
       gasPrice: mainnetGwei * 1000000000,
       accounts: {
         mnemonic: mnemonic(),
       },
     },
     ropsten: {
-      url: "https://ropsten.infura.io/v3/460f40a260564ac4a4f4b3fffb032dad", // <---- YOUR INFURA ID! (or it won't work)
-
+      url: "https://ropsten.infura.io/v3/XXXXXXXXXXXXXXXXXXXXXXX", // <---- YOUR INFURA ID! (or it won't work)
       //      url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXXXX/eth/ropsten",// <---- YOUR MORALIS ID! (not limited to infura)
-
       accounts: {
         mnemonic: mnemonic(),
       },
     },
     goerli: {
-      url: "https://goerli.infura.io/v3/460f40a260564ac4a4f4b3fffb032dad", // <---- YOUR INFURA ID! (or it won't work)
-
+      url: "https://goerli.infura.io/v3/XXXXXXXXXXXXXXXXXXXXXXX", // <---- YOUR INFURA ID! (or it won't work)
       //      url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXXXX/eth/goerli", // <---- YOUR MORALIS ID! (not limited to infura)
-
       accounts: {
         mnemonic: mnemonic(),
       },
@@ -160,14 +109,13 @@ module.exports = {
         mnemonic: mnemonic(),
       },
     },
-    polytest: {
+    mumbai: {
       url: "https://speedy-nodes-nyc.moralis.io/XXXXXXXXXXXXXXXXXXXXXXX/polygon/mumbai", // <---- YOUR MORALIS ID! (not limited to infura)
       gasPrice: 1000000000,
       accounts: {
         mnemonic: mnemonic(),
       },
     },
-
     matic: {
       url: "https://rpc-mainnet.maticvigil.com/",
       gasPrice: 1000000000,
@@ -277,6 +225,7 @@ module.exports = {
     },
   },
   solidity: {
+    // Add compilers here vvvv
     compilers: [
       {
         version: "0.8.4",
@@ -299,19 +248,19 @@ module.exports = {
     ],
   },
   ovm: {
-    solcVersion: "0.7.6",
+    solcVersion: "0.8.4",
   },
   namedAccounts: {
     deployer: {
-      default: 0, // here this will by default take the first account as deployer
+      default: 0, // this will by default take the first account as deployer
     },
   },
   etherscan: {
     apiKey: "DNXJA8RX2Q3VZ4URQIWP7Z68CJXQZSC6AW",
   },
 };
 
-const DEBUG = false;
+const DEBUG = true;
 
 function debug(text) {
   if (DEBUG) {