diff --git a/package.json b/package.json
index 0193a82..6a5dec3 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
   "scripts": {
     "test": "npm run test --workspace=packages/safe-chain --workspace=packages/safe-chain-bun",
     "test:e2e": "npm run test --workspace=test/e2e",
-    "lint": "npm run lint --workspace=packages/safe-chain"
+    "lint": "npm run lint --workspace=packages/safe-chain",
+    "typecheck": "npm run typecheck --workspace=packages/safe-chain"
   },
   "repository": {
     "type": "git",
diff --git a/packages/safe-chain/src/environment/userInteraction.js b/packages/safe-chain/src/environment/userInteraction.js
index 14fbc4a..3222874 100644
--- a/packages/safe-chain/src/environment/userInteraction.js
+++ b/packages/safe-chain/src/environment/userInteraction.js
@@ -8,6 +8,9 @@ import {
   LOGGING_VERBOSE,
 } from "../config/settings.js";
 
+/**
+ * @type {{ bufferOutput: boolean, bufferedMessages:(() => void)[]}}
+ */
 const state = {
   bufferOutput: false,
   bufferedMessages: [],
@@ -72,12 +75,21 @@ function writeExitWithoutInstallingMaliciousPackages() {
   writeOrBuffer(() => console.error(message));
 }
 
+/**
+ * @param {string} message
+ * @param {...any} optionalParams
+ * @returns {void}
+ */
 function writeVerbose(message, ...optionalParams) {
   if (!isVerboseMode()) return;
 
   writeOrBuffer(() => console.log(message, ...optionalParams));
 }
 
+/**
+ *
+ * @param {() => void} messageFunction
+ */
 function writeOrBuffer(messageFunction) {
   if (state.bufferOutput) {
     state.bufferedMessages.push(messageFunction);
diff --git a/packages/safe-chain/src/main.js b/packages/safe-chain/src/main.js
index feb5156..eea9257 100644
--- a/packages/safe-chain/src/main.js
+++ b/packages/safe-chain/src/main.js
@@ -21,7 +21,6 @@ export async function main(args) {
   // Global error handlers to log unhandled errors
   process.on("uncaughtException", (error) => {
     ui.writeError(`Safe-chain: Uncaught exception: ${error.message}`);
-    // @ts-expect-error writeVerbose will be added in a future PR
     ui.writeVerbose(`Stack trace: ${error.stack}`);
     process.exit(1);
   });
@@ -29,7 +28,6 @@ export async function main(args) {
   process.on("unhandledRejection", (reason) => {
     ui.writeError(`Safe-chain: Unhandled promise rejection: ${reason}`);
     if (reason instanceof Error) {
-      // @ts-expect-error writeVerbose will be added in a future PR
       ui.writeVerbose(`Stack trace: ${reason.stack}`);
     }
     process.exit(1);