I'm making a pallet that takes a string as the input. I tested it and it works well with English words, but when I try Vietnamese, the input box turned red and I couldn't submit the extrinsic. How can I solve this? In my code, the data type I used to save the text is Vec<u8>

Ienter image description here

  • 1
    Did you try to use Bytes there? ie Viêt -> 0x5669c3aa74? Feb 14, 2022 at 8:52
  • @ArturGontijo No (?), I don't quite understand what you mean. Can you explain further? I'd be very appreciative.
    – Minh Mốc
    Feb 14, 2022 at 9:04
  • 1
    Posted it as an answer, let me know if I was clear there =). Feb 14, 2022 at 11:23

1 Answer 1


You can use hex decimals (0x...) there too.

As you can see in its placeholder, when the Bytes field is empty: enter image description here

So you will need a tool to convert your UTF8 string into bytes, like:

fn main() {
    println!("0x{}", hex::encode("Viêt"));
// Outputs: 0x5669c3aa74

Now you can fill the field with 0x5669c3aa74 and submit the extrinsic.

  • Thank you alot!
    – Minh Mốc
    Feb 14, 2022 at 14:18
  • This would also work with emojis, right?
    – stano
    Feb 17, 2022 at 9:20
  • Yep, you can send a 👍 as 0xf09f918d. Feb 17, 2022 at 10:56

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