Initial commit: add .gitignore and README

smart_contracts/contracts/Counter.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.10;
+contract Counter {
+    int private count = 0;
+    function incrementCounter() public {
+        count += 1;
+    }
+    function decrementCounter() public {
+        count -= 1;
+    }
+    function getCount() public view returns (int) {
+        return count;
+    }
+}

smart_contracts/contracts/SimpleStorage.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.10;
+
+contract SimpleStorage {
+  uint public storedData;
+  event stored(address _to, uint _amount);
+  constructor(uint initVal) {
+    emit stored(msg.sender, initVal);
+    storedData = initVal;
+  }
+  function set(uint x) public {
+    emit stored(msg.sender, x);
+    storedData = x;
+  }
+  function get() view public returns (uint retVal) {
+    return storedData;
+  }
+}