Salaam
Tally is a currency backed by actual physical gold stored in a vault in Switzerland.
Does there seem to be any issue in using this?
Wasalam
May Allah bless you.
The project in itself might be fine, but there are issues left unanswered in relation to the transfer of ownership and possession of the gold, at the time of entering into a transaction.
I personally cannot say it’s shariah compliant at this stage.
And Allah knows best!
.Jazakallah Khaira. .