Polygon-Advocates · SonuChoud · Mar 25, 2023 · Mar 25, 2023 · Mar 26, 2023 · Mar 28, 2023
diff --git a/solution-2.md b/solution-2.md
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.9;
+
+import "@openzeppelin/contracts@4.8.2/token/ERC20/ERC20.sol";
+
+import "@openzeppelin/contracts@4.8.2/token/ERC20/extensions/ERC20Burnable.sol";
+
+import "@openzeppelin/contracts@4.8.2/access/Ownable.sol";
+
+contract Sonu is ERC20, ERC20Burnable, Ownable {
+
+    constructor() ERC20("Sonu", "SON") {
+        _mint(msg.sender, 100000 * 10 ** decimals());
+    }
+
+    function mint(address to, uint256 amount) public onlyOwner {
+        _mint(to, amount);
+    }
+}
diff --git a/solution-3.md b/solution-3.md
@@ -0,0 +1,118 @@
+
+URL - https://testnet-zkevm.polygonscan.com/tx/0x24b662faba9d155d3d183ada601a5e1eeceb331704f5236911d6c2386963df67
+
+Contract Address - 0x30a7755f65bbbe16ae33c3175023a0fe1172262a
+
+0x24b662faba9d155d3d183ada601a5e1eeceb331704f5236911d6c2386963df67
+
+
+
+
+## Code
+
+<!DOCTYPE html>
+<html>
+  <head>
+  </head>
+  <body>
+    <h1></h1>
+    <p><span id="currentSubmission"></span></p>
+    <label for="newUsername"></label>
+    <input type="text" id="newUsername" />
+    <button class="submit-btn"></button>
+
+    <script>
+      // Check if MetaMask is installed and connected
+      if (window.ethereum) {
+        const web3 = new Web3(window.ethereum);
+
+        // Request account access if needed
+        window.ethereum
+          .request({ method: "eth_requestAccounts" })
+          .then(() => {
+            // Define contract ABI
+            const abi = [
+              {
+                inputs: [
+                  {
+                    internalType: "string",
+                    name: "_username",
+                    type: "string",
+                  },
+                ],
+                stateMutability: "nonpayable",
+                type: "constructor",
+              },
+              {
+                inputs: [],
+                name: "getCurrentSubmission",
+                outputs: [
+                  {
+                    internalType: "string",
+                    name: "",
+                    type: "string",
+                  },
+                ],
+                stateMutability: "view",
+                type: "function",
+              },
+              {
+                inputs: [
+                  {
+                    internalType: "string",
+                    name: "_username",
+                    type: "string",
+                  },
+                ],
+                name: "submitUsername",
+                outputs: [],
+                stateMutability: "nonpayable",
+                type: "function",
+              },
+            ];
+
+            // Define contract address
+            const contractAddress =
+              "0x30a7755f65bbbe16ae33c3175023a0fe1172262a";
+
+            // Create contract instance
+            const contract = new web3.eth.Contract(abi, contractAddress);
+            console.log(contract);
+
+            // Display current submission on page load
+            contract.methods.getCurrentSubmission().call((error, result) => {
+              if (error) {
+                console.error(error);
+                return;
+              }
+              document.getElementById("currentSubmission").textContent = result;
+            });
+
+            // Submit new username on button click
+            const btn = document.querySelector(".submit-btn");
+            function submitUsername() {
+              const newUsername = document.getElementById("newUsername").value;
+              contract.methods
+                .submitUsername(newUsername)
+                .send(
+                  { from: web3.eth.defaultAccount },
+                  (error, transactionHash) => {
+                    if (error) {
+                      console.error(error);
+                      return;
+                    }
+                    console.log("Transaction hash:", transactionHash);
+                  }
+                );
+            }
+            btn.addEventListener("click", submitUsername);
+          })
+          .catch((error) => {
+            console.error(error);
+          });
+      } else {
+        console.error("MetaMask not detected");
+      }
+    </script>
+  </body>
+</html>