feat[contracts]: Add storage slot parsing functions for chugsplash

packages/contracts/contracts/test-helpers/Helper_StorageHelper.sol

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >0.5.0 <0.8.0;
+
+contract Helper_StorageHelper {
+    function setStorage(
+        bytes32 _key,
+        bytes32 _val
+    )
+        public
+    {
+        assembly {
+            sstore(_key, _val)
+        }
+    }
+
+    struct BasicStruct {
+        uint256 _structUint256;
+        address _structAddress;
+        bytes32 _structBytes32;
+    }
+
+    uint8 public _uint8;     // slot 0
+    bytes32 _spacer1;        // to avoid slot packing, unused
+
+    uint64 public _uint64;   // slot 2
+    bytes32 _spacer2;        // to avoid slot packing, unused
+
+    uint256 public _uint256; // slot 4
+    bytes32 _spacer3;        // to avoid slot packing, unused
+
+    bytes1 public _bytes1;   // slot 6
+    bytes32 _spacer4;        // to avoid slot packing, unused
+
+    bytes8 public _bytes8;   // slot 8
+    bytes32 _spacer5;        // to avoid slot packing, unused
+
+    bytes32 public _bytes32; // slot 10
+    bytes32 _spacer6;        // to avoid slot packing, unused
+
+    bool public _bool;       // slot 12
+    bytes32 _spacer7;        // to avoid slot packing, unused
+
+    address public _address; // slot 14
+    bytes32 _spacer8;        // to avoid slot packing, unused
+
+    bytes public _bytes;     // slot 16
+    string public _string;   // slot 17
+
+    BasicStruct public _struct; // slot 18,19,20
+
+    // Pack into (bytes11,bool,address)
+    address public _packedAddress; // slot 21
+    bool public _packedBool;       // slot 21
+    bytes11 public _packedBytes11; // slot 21
+
+    // Pack into (address,bool,bytes11)
+    bytes11 public _otherPackedBytes11; // slot 22
+    bool public _otherPackedBool;       // slot 22
+    address public _otherPackedAddress; // slot 22
+
+    // Unsupported types.
+    mapping (uint256 => uint256) _uint256ToUint256Map;
+    uint256[] _uint256Array;
+}

packages/contracts/package.json

@@ -52,7 +52,8 @@
     "@typechain/hardhat": "^1.0.1",
     "ganache-core": "^2.13.2",
     "glob": "^7.1.6",
-    "handlebars": "^4.7.7"
+    "handlebars": "^4.7.7",
+    "semver": "^7.3.5"
   },
   "devDependencies": {
     "@eth-optimism/hardhat-ovm": "^0.1.0",

packages/contracts/src/chugsplash/index.ts

@@ -1 +1,2 @@
 export * from './config'
+export * from './storage'