Can't seem to fix undefined await result - node.js

Question

I need to compare passwords with Bcrypt library.
here's my code:
bcrypt.js
const bcrypt = require('bcrypt');
const saltRounds = 10;
var Bcrypt = () => {
}
Bcrypt.encrypt = async function(password) {
const hashedPassword = await bcrypt.hash(password, saltRounds)
return hashedPassword
}
Bcrypt.compare = async function(password, hashed_password) {
await bcrypt.compare(password, hashed_password, function(err, result) {
return result;
});
}
module.exports = Bcrypt;
userMethods.js
const Bcrypt = require('../../global-functions/bcrypt');
var login = async(req) => {
var user = {
username: req.body.username,
password: req.body.password
}
if (!user.username || !user.password) {
return ({ error: "Login details are required to continue." });
}
return new Promise((resolve, reject) => {
db.query("SELECT name,username,email,password FROM users WHERE username = ?", [req.body.username], function(err, rows) {
if (err) {
console.log("error: ", err);
reject(err);
} else {
var compared_result = Bcrypt.compare(user.password, rows[0].password); // returns **undefined**
}
if (compared_result) {
resolve({ success: compared_result, username: rows[0].username });
} else {
resolve({ error: "wrong username or password!" });
}
});
});
}
when I try to add await before Bcrypt.compare I get an "await is only valid in async function" error.
I would appreciate any help.

Answer 1

Do you want to put it before this Bcrypt.compare
Bcrypt.compare = async function(password, hashed_password) {
await bcrypt.compare(password, hashed_password, function(err, result) {
return result;
});
}
Then you have to write this code into a outer function and give async there then use await inside
async function()
{
await Bcrypt.compare = async function(password, hashed_password) {
await bcrypt.compare(password, hashed_password, function(err, result) {
return result;
});
}
}
I think this might solve your problem