Create evm.sol

smart-contract/evm.sol

@@ -0,0 +1,14 @@
+// evm.sol
+pragma solidity ^0.8.0;
+
+contract SmartContract {
+    mapping (string => string) public storage;
+
+    function store(string memory key, string memory value) public {
+        storage[key] = value;
+    }
+
+    function retrieve(string memory key) public view returns (string memory) {
+        return storage[key];
+    }
+}