upload zip file to s3 but not unzip it (corrupt)

Question

The file was successfully uploaded on the s3 bucket but when I download the zip file and does unzip it the file corrupt not unzip. how i solve it
//this is my code

const { S3 } = require("aws-sdk");
const s3Uploadv2 = async (file) => {
  const s3 = new S3();
  const param = {
    Bucket: "bb-vision/production-script",
    Key: `${file.originalname}`,
    Body: file.buffer,
    ACL: "public-read",
    ContentType: file.mimetype,
    ContentEncoding: file.encoding,
  };
  return await s3.upload(param).promise();
};
module.exports = s3Uploadv2;


app.post("/devices/production", upload.array("file_script"), async (req, res) => {
  const file= req.files[0];`enter code here`
  const result = await s3Uploadv2(file);
  return res.status(201).send(result)`enter code here`
});