Great job! Great perseverance!
Yes, GS8 was the trick. Funnily, cashu tokens can only be encoded with this. The others somehow do not create consistent redeemable results.
It had me stumped for a while, trying to find the correct braille translator.
I got the lower case first, which lead to the cashu* clue, then the upper case, and finally the numbers, which lead me to https://en.m.wikipedia.org/w/index.php?title=Gardner%E2%80%93Salinas_braille_codes
I was cursing not having my laptop with me, do I had to do it all on my phone.
Discussion
Who knew braille could be a money transmitter. 😅
An unlicensed one, like my physical wallet 😂😂😂