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what usecase u talking about?...
Bitsend uses it's own coin to move funds on a blockchain correct? Ergo if another coin is going to send funds with bitsend then they first have to be converted to bitsend coin, correct?
that not what happens at noblepay
u have a noblepay onlinewallet which can hold coins in each supported currency
in backend noblepay will run normal headless wallets of that coins that interact with its mobile webwallet platform
now when u utilize a coin balance in a way that need value conversion then this conversion will be done by the noblepay plattform
example u want to pay a € bill with bitsend via SEPA transaction
then noblepay will calculate how much bitsend needed for that amount of €
reduce ur bitsend balance and create the € SEPA transaction towards the target bank account
how noblepay convert the bitsend towards € in detail is not full transparent but u will see that the conversion rates are very fair
just think about noblepay as if it would be something like paypal
in paypal too u can have multiple currencies ( $ and € for example)
and it can also on the fly convert them allow u pay a $ bill with ur € balance
noblepay could do the same just with crypto currency balamce u have in ur noblepay mobile wallet