How to add animated stickers packs to WhatsApp using React Native?

Question

I am using image picker to pick animated webp images in react-native android and can add static stickers but it fails to add animated sticker pack. To avoid file type issues I have used sample stickers from WhatsApp's sample animated sticker assets. (png tray icon sized 96x96 under 50kb and 3 animated webp files)

I am using react-native-whatsapp-sticker and modified it according to a repo react-native-dynamic-whatsapp-sticker. Those modules have not get updated since 2-3 years so the repo does not contains code for animated stickers. So I compered my module with WhatsApp sample app and made changes accordingly.There is no errors building the apk and stickers get added if I set animated sticker pack to false. But setting "animated_sticker_pack"=true and then adding sticker pack, WhatsApp show error as "there is problem with this pack...".

below is the code and links for modules file. I have been trying hard to solve it but could not get success. Thanks in advance.

Code:

    let pack = {
      "identifier": 'id1',
      "name": 'name1',
      "publisher": 'pub',
      "tray_image_file": tray,
      "publisher_email": Meta['EMAIL'],
      "publisher_website": Meta['SITE'],
      "privacy_policy_website": Meta['POLICY'],
      "license_agreement_website": Meta['LICENSE'],
      "image_data_version":"1",
      "avoid_cache":true,
      "animated_sticker_pack":true, // if false then works fine for static sticker 
      "stickers": stickers // array of {image_file:image.uri, emojis:['', ''],}
    }

  const send = (pack) => {
    return RNWhatsAppStickers.prepare(JSON.stringify(pack))
    .then(str => JSON.parse(str.slice('1')) ) // {"animated_sticker_pack": 1, "identifier": "id1", "isWhitelisted": 0, "name": "name1", "publisher": "pub"}
    .then(res => RNWhatsAppStickers.send(res.identifier,res.name) )
  }

all those 5 java files responsible for sending sticker to WhatsApp. https://github.com/CrackerKSR/temporary