Module workflow 

Bank workflow trait and DKB implementation.

Each bank defines its own complete workflow via the BankOps trait. The workflows compose typed Dialog transitions from protocol.rs.

Compile-time safety: workflow methods take typed dialog states. fetch() takes Dialog<Open> — you can’t call it without authentication.

Structs

Dkb

DKB (Deutsche Kreditbank) FinTS workflow.

FetchOpts

Options controlling what data to fetch in a single authenticated dialog.

FetchResult

Result of fetching data from an open dialog.

GenericBank

A generic FinTS bank implementation that works with any BankConfig. Used when the bank ID is not in the registry (e.g. custom URL + BLZ).

InitiateNoTanResult

Result when no TAN is required (SCA exemption).

InitiateResult

Result of initiating a connection.

Enums

AnyBank

Enum dispatch for bank implementations — zero-cost, no dynamic dispatch.

InitiateOutcome

Either we need TAN or we’re already authenticated.

Traits

BankOps

Each bank implements its own workflow as typed Dialog transitions.

Functions

bank_ops

Look up a bank implementation by its BLZ (Bankleitzahl).

bank_ops_with_config

Create a bank implementation from a custom BankConfig (for non-registry banks).