diff --git a/helpers/error.js b/helpers/error.js
new file mode 100644
index 0000000..a3dbcc7
--- /dev/null
+++ b/helpers/error.js
@@ -0,0 +1,24 @@
+const { logger } = require("../utils/logger");
+class ErrorHandler extends Error {
+  constructor(statusCode, message) {
+    super();
+    this.status = "error";
+    this.statusCode = statusCode;
+    this.message = message;
+  }
+}
+
+const handleError = (err, req, res, next) => {
+  const { statusCode, message } = err;
+  logger.error(err);
+  res.status(statusCode || 500).json({
+    status: "error",
+    statusCode: statusCode || 500,
+    message: statusCode === 500 ? "An error occurred" : message,
+  });
+  next();
+};
+module.exports = {
+  ErrorHandler,
+  handleError,
+};
diff --git a/helpers/hashPassword.js b/helpers/hashPassword.js
new file mode 100644
index 0000000..c30a35a
--- /dev/null
+++ b/helpers/hashPassword.js
@@ -0,0 +1,12 @@
+const bcrypt = require("bcrypt");
+
+const hashPassword = async (password) => {
+  const salt = await bcrypt.genSalt();
+  const hashedPassword = await bcrypt.hash(password, salt);
+  return hashedPassword;
+};
+
+const comparePassword = async (password, passwordHash) =>
+  await bcrypt.compare(password, passwordHash);
+
+module.exports = { hashPassword, comparePassword };
diff --git a/helpers/test_helper.js b/helpers/test_helper.js
new file mode 100644
index 0000000..95b8e28
--- /dev/null
+++ b/helpers/test_helper.js
@@ -0,0 +1,13 @@
+const pool = require("../config");
+
+const usersInDb = async () => {
+  const users = await pool.query("SELECT * FROM USERS");
+  return users.rows;
+};
+
+const productsInDb = async () => {
+  const products = await pool.query("SELECT * FROM products");
+  return products.rows;
+};
+
+module.exports = { usersInDb, productsInDb };
diff --git a/helpers/utils.js b/helpers/utils.js
new file mode 100644
index 0000000..41c60ed
--- /dev/null
+++ b/helpers/utils.js
@@ -0,0 +1,89 @@
+const setResponse = async (data = [], message = "success", statusCode = 200) => {
+  const response = {
+    data,
+    total: data.length,
+    message,
+    statusCode
+  }
+
+  return response
+};
+
+const setResponsePaging = async (data = [], total, limit, page, message = "success", statusCode = 200) => {
+
+  const totalPages = Math.ceil(total / limit);
+
+  const response = {
+    message,
+    statusCode,
+    data,
+    total: data.length,
+    paging: {
+      total,
+      limit,
+      page,
+      page_total: totalPages
+    }
+  }
+
+  return response
+};
+
+const setPaging = async (total, limit, page) => {
+
+  const totalPages = Math.ceil(total / limit);
+
+  const response = {
+    total,
+    limit,
+    page,
+    page_total: totalPages
+  }
+
+  return response
+};
+
+function convertId(items, id, fieldId = "id", fieldName = "name") {
+  var match = ""
+  items.forEach(element => {
+    if (element[fieldId] == id) {
+      match = element[fieldName]
+    }
+  });
+
+  return match
+}
+
+function formatToYYYYMMDD(date) {
+  return new Intl.DateTimeFormat('id-ID', {
+    timeZone: 'Asia/Jakarta',
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).format(date).split('/').reverse().join('-'); // Ubah format dari dd/mm/yyyy ke yyyy-mm-dd
+}
+
+function ensureArray(param) {
+  return Array.isArray(param) ? param : [param];
+}
+
+function orderByClauseQuery(orderParams) {
+  orderParams = ensureArray(orderParams)
+
+  // Transform order parameters to SQL ORDER BY syntax
+  const validDirections = ['ASC', 'DESC'];
+  const orderConditions = orderParams.map(param => {
+    const [field, direction] = param.split(':');
+    if (!validDirections.includes(direction.toUpperCase())) {
+      throw new Error(`Invalid direction: ${direction}`);
+    }
+    return `${field} ${direction}`;
+  });
+
+  // Gabungkan dengan koma untuk digunakan dalam query
+  const orderByClause = orderConditions.join(', ');
+
+  return orderByClause
+}
+
+module.exports = { setResponse, setResponsePaging, setPaging, convertId, formatToYYYYMMDD, orderByClauseQuery };
diff --git a/helpers/validateUser.js b/helpers/validateUser.js
new file mode 100644
index 0000000..c904bb4
--- /dev/null
+++ b/helpers/validateUser.js
@@ -0,0 +1,9 @@
+const validateUser = (email, password) => {
+  const validEmail = typeof email === "string" && email.trim() !== "";
+  const validPassword =
+    typeof password === "string" && password.trim().length >= 6;
+
+  return validEmail && validPassword;
+};
+
+module.exports = validateUser;