lazop.rb

payload = {
  "Request": {
    "Product": {
      "PrimaryCategory": "6614",
      "Attributes": {
        "name": "api create product test sample",
        "short_description": "This is a nice product",
        "brand": "Remark",
        "model": "asdf",
        "kid_years": "Kids (6-10yrs)"
      },
      "Skus": {
        "Sku": {
          "SellerSku": "api-create-test-1",
          "color_family": "Green",
          "size": "40",
          "quantity": "1",
          "price": "388.50",
          "package_length": "11",
          "package_height": "22",
          "package_weight": "33",
          "package_width": "44",
          "package_content": "this is what's in the box",
          "Images": {
            "Image": [
              "http://sg.s.alibaba.lzd.co/original/59046bec4d53e74f8ad38d19399205e6.jpg",
              "http://sg.s.alibaba.lzd.co/original/179715d3de39a1918b19eec3279dd482.jpg"
            ]
          }
        }
      }
    }
  }
}

access_token="50000700d329lnoworEdbKvkhRaUvgZDiu4rW1DjGth316a44c1ffztDCjgDH7P"
app_key="116891"
app_secret="CLsefCpRkTFFppZhKSvr0rsIAFt8dL35"
sign_methods="sha256"

timestamp="#{Date.today.to_time.to_i}"
parameters_str="/product/createaccess_token"+access_token+"app_key"+app_key+"sign_method"+sign_method+"timestamp"+timestamp
# => /product/createaccess_token50000700d329lnoworEdbKvkhRaUvgZDiu4rW1DjGth316a44c1ffztDCjgDH7Papp_key116891sign_methodsha256timestamp1583769600

digest = OpenSSL::Digest.new(sign_methods)
sign=OpenSSL::HMAC.hexdigest(digest, app_secret, parameters_str)
# => 8cf966247e1926b6c48a16c18f605a5fcb4c644d13f978c03ec68697c538991b

request = LazopApiClient::Request.new('/product/create')
request.add_api_parameter("payload", payload.to_xml)
request.add_api_parameter("sign", sign)
response = @lazada.execute(request, access_token)
# => #<LazopApiClient::Response:0x007f8af97dfd58 @type="ISV", @code="IncompleteSignature", @message="The request signature does not conform to lazada standards", @body={"type"=>"ISV", "code"=>"IncompleteSignature", "message"=>"The request signature does not conform to lazada standards", "request_id"=>"0b0da12615838140378982088"}, @request_id="0b0da12615838140378982088">