Add season2 contracts and challenge pages (#27)

Author: damianmarti

packages/hardhat/contracts/INFTFlags.sol

@@ -3,4 +3,8 @@ pragma solidity >=0.8.0 <0.9.0;
 
 interface INFTFlags {
     function mint(address _recipient, uint256 _challengeId) external;
+
+    function hasMinted(address _recipient, uint256 _challengeId) external view returns (bool);
+
+    function tokenIdCounter() external view returns (uint256);
 }

packages/hardhat/contracts/Challenge1.sol renamed to packages/hardhat/contracts/S1/Season1Challenge1.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge1 {
+contract Season1Challenge1 {
     address public nftContract;
     mapping(address => string) public builderNames;
 

packages/hardhat/contracts/Challenge11.sol renamed to packages/hardhat/contracts/S1/Season1Challenge11.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge11 {
+contract Season1Challenge11 {
     address public nftContract;
 
     constructor(address _nftContract) {

packages/hardhat/contracts/Challenge12.sol renamed to packages/hardhat/contracts/S1/Season1Challenge12.sol

@@ -1,10 +1,10 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./RLPReader.sol";
-import "./INFTFlags.sol";
+import "../RLPReader.sol";
+import "../INFTFlags.sol";
 
-contract Challenge12 {
+contract Season1Challenge12 {
     using RLPReader for RLPReader.RLPItem;
     using RLPReader for bytes;
 

packages/hardhat/contracts/Challenge2.sol renamed to packages/hardhat/contracts/S1/Season1Challenge2.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge2 {
+contract Season1Challenge2 {
     address public nftContract;
 
     constructor(address _nftContract) {

packages/hardhat/contracts/Challenge3.sol renamed to packages/hardhat/contracts/S1/Season1Challenge3.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge3 {
+contract Season1Challenge3 {
     address public nftContract;
 
     constructor(address _nftContract) {

packages/hardhat/contracts/Challenge4.sol renamed to packages/hardhat/contracts/S1/Season1Challenge4.sol

@@ -4,9 +4,9 @@ pragma solidity >=0.8.0 <0.9.0;
 import "@openzeppelin/contracts/access/Ownable.sol";
 import "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol";
 import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge4 is Ownable {
+contract Season1Challenge4 is Ownable {
     using ECDSA for bytes32;
     using MessageHashUtils for bytes32;
 

packages/hardhat/contracts/Challenge5.sol renamed to packages/hardhat/contracts/S1/Season1Challenge5.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge5 {
+contract Season1Challenge5 {
     address public nftContract;
     mapping(address => uint256) public points;
     uint256 public constant POINTS_TO_MINT = 10;

packages/hardhat/contracts/Challenge6.sol renamed to packages/hardhat/contracts/S1/Season1Challenge6.sol

@@ -3,13 +3,13 @@ pragma solidity >=0.8.0 <0.9.0;
 
 import "@openzeppelin/contracts/utils/Strings.sol";
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
 interface IContract6Solution {
     function name() external view returns (string memory);
 }
 
-contract Challenge6 {
+contract Season1Challenge6 {
     using Strings for uint256;
 
     address public nftContract;

packages/hardhat/contracts/Challenge7.sol renamed to packages/hardhat/contracts/S1/Season1Challenge7.sol

@@ -1,9 +1,9 @@
 //SPDX-License-Identifier: MIT
 pragma solidity >=0.8.0 <0.9.0;
 
-import "./INFTFlags.sol";
+import "../INFTFlags.sol";
 
-contract Challenge7Delegate {
+contract Season1Challenge7Delegate {
     address public owner;
     event OwnerChange(address indexed owner);
 
@@ -18,14 +18,14 @@ contract Challenge7Delegate {
     }
 }
 
-contract Challenge7 {
+contract Season1Challenge7 {
     address public owner;
-    Challenge7Delegate delegate;
+    Season1Challenge7Delegate delegate;
     address public nftContract;
 
     constructor(address _nftContract, address _delegateAddress, address _owner) {
         nftContract = _nftContract;
-        delegate = Challenge7Delegate(_delegateAddress);
+        delegate = Season1Challenge7Delegate(_delegateAddress);
         owner = _owner;
     }