Adding first version of the DappIndexer

env.example

@@ -0,0 +1,23 @@
+# Foundry default testing private keys
+PK0="0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80" 
+PK1="0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d" 
+PK2="0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a" 
+PK3="0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6"
+PK4="0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a"
+PK5="0x8b3a350cf5c34c9194ca85829a2df0ec3153be0318b5e2d3348e872092edffba" 
+PK6="0x92db14e403b83dfe3df233f83dfa3a0d7096f21ca9b0d6d6b8d88b2b4ec1564e" 
+PK7="0x4bbbf85ce3377467afe5d46f804f221813b2bb87f24d81f60f1fcdbf7cbf4356" 
+PK8="0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97" 
+PK9="0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6" 
+
+# some IPFS URIs to test
+dapps="bafkreibc6p3y36yjmeqqnttqfrpb2yttxa6aonoywxwdxl7nqym4jj3jwa 
+bafkreidcf5baqb5wevs6avyd7dtd3j7rzrq65uyqasj4dbkcy6na4ig3ay
+bafkreibffiehtv4ntajq5vjwpl7q44i6cjbg54lm5hkoa665ue2taspiyu 
+bafkreifqztiwfutjik4wfs3gyfdyrff7cugi4mcctluunrrbp5cgareisq 
+bafybeiepujtyev5ett75mxd5eazjlqor7loibey5exbmoal6teivnrrkwi"
+
+# https://book.getfoundry.sh/tutorials/solidity-scripting?highlight=Private%20key#environment-configuration
+# GOERLI_RPC_URL=
+# PRIVATE_KEY=
+# ETHERSCAN_API_KEY=

script/DappIndexer.s.sol

@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.23;
+
+import {Script, console2} from "forge-std/Script.sol";
+import { DappIndexer} from "src/DappIndexer.sol";
+
+contract DappIndexerScript is Script {
+    DappIndexer public dappIdxr;
+    string[] public dappsURI;
+    
+    function setUp() public {
+        dappIdxr = new DappIndexer(0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266,
+                           0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266);
+        console2.log("The Dapps Indexer contract address is: ", address(dappIdxr));
+        dappsURI = vm.envString("dapps", ' ');
+    }
+
+    // run is the entry point
+    function run() public {
+        // startBroadcast and stopBraodcast will let us execute transactions anything between them
+        vm.startBroadcast();
+        // here we just need to deploy a new contractc
+
+        bytes32 CID1;
+        bytes32 CID2;
+
+        (CID1, CID2) = stringToBytes32Pair(dappsURI[0]);
+
+        // Add Dapp
+        console2.log("-----Adding Dapp-----");
+        console2.log("Bytes32 first:");
+        console2.logBytes32(CID1);
+        console2.log("Bytes32 second:");
+        console2.logBytes32(CID2);
+        console2.log(Bytes32PairToString(CID1, CID2));
+        dappIdxr.addDapp(bytes32("Dapp01"), DappIndexer.PackedCID(CID1, CID2));
+
+        // retrive Dapp
+        console2.log("-----retriving Dapp-----");
+        DappIndexer.PackedCID memory dapp1 = dappIdxr.getCID(bytes32("Dapp01"));
+        console2.log("Bytes32 first:");
+        console2.logBytes32(dapp1.CID1);
+        console2.log("Bytes32 second:");
+        console2.logBytes32(dapp1.CID2);
+        console2.log(Bytes32PairToString(dapp1.CID1, dapp1.CID2));
+
+        vm.stopBroadcast();
+    }
+
+    function Bytes32PairToString(bytes32 part1, bytes32 part2) public pure returns (string memory) {
+        // Concatenate the two bytes32 variables
+        bytes memory concatenatedBytes = abi.encodePacked(part1, part2);
+
+        // Convert the concatenated bytes to a string
+        string memory str = string(concatenatedBytes);
+
+        return str;
+    }
+
+    function stringToBytes32Pair(string memory source) public pure returns (bytes32 part1, bytes32 part2) {
+        bytes memory sourceBytes = bytes(source);
+        require(sourceBytes.length <= 64, "String must be less than or equal to 64 bytes");
+
+        assembly {
+            // Load the first 32 bytes of the string data
+            part1 := mload(add(sourceBytes, 32))
+            // Load the second 32 bytes of the string data
+            part2 := mload(add(sourceBytes, 64))
+        }
+    }
+}

src/Counter.sol

@@ -1,14 +0,0 @@
-// SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
-
-contract Counter {
-    uint256 public number;
-
-    function setNumber(uint256 newNumber) public {
-        number = newNumber;
-    }
-
-    function increment() public {
-        number++;
-    }
-}

src/DappIndexer.sol

@@ -4,10 +4,34 @@ pragma solidity ^0.8.23;
 import "@openzeppelin/contracts/access/AccessControl.sol";
 
 contract DappIndexer is AccessControl {
+    // Moderator adds/updates and removes DAPPs
+    bytes32 public constant MODERATOR_ROLE = keccak256("MODERATOR_ROLE");
 
-    constructor(){
+    struct PackedCID {
+        bytes32 CID1;
+        bytes32 CID2;
+    }
+
+    mapping (bytes32 => PackedCID) private dapps;
+
+    constructor(
+        address defaultAdmin,
+        address moderator
+    ){
         _grantRole(DEFAULT_ADMIN_ROLE, defaultAdmin);
+        _grantRole(MODERATOR_ROLE, moderator);
     }
 
-
+    function addDapp(bytes32 dapp_name, PackedCID calldata cid)
+    external onlyRole(MODERATOR_ROLE) {
+        dapps[dapp_name] = PackedCID(cid.CID1, cid.CID2); 
+    }
+
+    function removeDapp(bytes32 dapp_name)  external onlyRole(MODERATOR_ROLE) {
+        delete dapps[dapp_name];
+    }
+
+    function getCID(bytes32 dapp_name) external view returns (PackedCID memory){
+        return dapps[dapp_name]; 
+    }
 }

test/DappIndexer.t.sol

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.23;
+
+import { Test, console2 } from "forge-std/Test.sol";
+import { DappIndexer } from "src/DappIndexer.sol";
+
+contract DappIndexerTest is Test {
+    DappIndexer public dappIdxr;
+    string[] public dappsURI;
+    
+    function setUp() public {
+        dappIdxr = new DappIndexer(address(this), address(this));
+        dappsURI = vm.envString("dapps", ' ');
+    }
+
+    function testAddDapp() public {
+        bytes32 CID1;
+        bytes32 CID2;
+
+        (CID1, CID2) = stringToBytes32Pair(dappsURI[0]);
+
+        // Add Dapp
+        console2.log("Bytes32 first:");
+        console2.logBytes32(CID1);
+        console2.log("Bytes32 second:");
+        console2.logBytes32(CID2);
+        console2.log(Bytes32PairToString(CID1, CID2));
+        dappIdxr.addDapp(bytes32("Dapp01"), DappIndexer.PackedCID(CID1, CID2));
+        // retrive Dapp
+        DappIndexer.PackedCID memory dapp1 = dappIdxr.getCID(bytes32("Dapp01"));
+        assertEq(CID1, dapp1.CID1);
+        assertEq(CID2, dapp1.CID2);
+        //string memory retrivedDapp = Bytes32PairToString(dapp1.CID1, dapp1.CID2);
+        //assertEq(dappsURI[0], retrivedDapp[0:59]);
+    }
+    
+    function Bytes32PairToString(bytes32 part1, bytes32 part2) public pure returns (string memory) {
+        // Concatenate the two bytes32 variables
+        bytes memory concatenatedBytes = abi.encodePacked(part1, part2);
+
+        // Convert the concatenated bytes to a string
+        string memory str = string(concatenatedBytes);
+
+        return str;
+    }
+
+    function stringToBytes32Pair(string memory source) public pure returns (bytes32 part1, bytes32 part2) {
+        bytes memory sourceBytes = bytes(source);
+        require(sourceBytes.length == 59, "URI string must equal to 59 bytes");
+
+        assembly {
+            // Load the first 32 bytes of the string data
+            part1 := mload(add(sourceBytes, 32))
+            // Load the second 32 bytes of the string data
+            part2 := mload(add(sourceBytes, 64))
+        }
+    }
+}