Create SuperLedger.sol

SuperLedger.sol

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+contract SuperLedger {
+    struct DataEntry {
+        address contributor;
+        string dataHash; // IPFS or other storage hash
+        uint256 timestamp;
+    }
+
+    mapping(uint256 => DataEntry) public ledger;
+    uint256 public entryCount;
+
+    function addData(string memory dataHash) public {
+        ledger[entryCount] = DataEntry(msg.sender, dataHash, block.timestamp);
+        entryCount++;
+    }
+}