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@startuml
Actor "Customer Browser" as Customer
Participant "Bank Site" as Bank
Participant "Taler Exchange" as Exchange
note over Customer, Bank: HTTPS
note over Customer, Exchange: HTTPS
note over Bank, Exchange: wire transfer
title Taler (Withdraw coins)
Customer->Bank: user authentication
Bank->Customer: send account portal
Customer->Customer: initiate withdrawal (specify amount and exchange)
Customer->Exchange: request coin denomination keys and wire transfer data
Exchange->Customer: send coin denomination keys and wire transfer data
Customer->Bank: execute withdrawal
opt
Bank->Customer: request transaction authorization
Customer->Bank: transaction authorization
end
Bank->Customer: withdrawal confirmation
Bank->Exchange: execute wire transfer
Customer->Exchange: withdraw request
Customer->Exchange: signed blinded coins
Customer->Customer: unblind coins
@enduml
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