diff --git a/hardhat.config.ts b/hardhat.config.ts
index 474ad75..a4f0b17 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -5,6 +5,8 @@ import { HardhatUserConfig } from "hardhat/config";
 import { NetworkUserConfig } from "hardhat/types";
 import { resolve } from "path";
 
+import "hardhat-tracer";
+
 dotenvConfig({ path: resolve(__dirname, "./.env") });
 
 const mnemonic: string | undefined = process.env.MNEMONIC;
diff --git a/package.json b/package.json
index 14228fb..9fe2ecb 100644
--- a/package.json
+++ b/package.json
@@ -59,9 +59,12 @@
     "fs-extra": "^10.1.0",
     "hardhat": "^2.12.2",
     "hardhat-gas-reporter": "^1.0.9",
+    "hardhat-tracer": "^1.2.0",
     "husky": "^8.0.1",
+    "keccak256": "^1.0.6",
     "lint-staged": "^13.0.3",
     "lodash": "^4.17.21",
+    "merkletreejs": "^0.2.32",
     "mocha": "^10.1.0",
     "pinst": "^3.0.0",
     "prettier": "^2.7.1",