Parameters for Lookup Request in the Balances API.

Build this struct with new!/1 and pass it to the corresponding function on Inttegro.Balances. Required keys are enforced immediately; optional values left as nil are omitted from the request sent to Inttegro.

Retrieves the application's current balances by currency and availability state.

A balance is a point-in-time projection of the ledger. It distinguishes funds that are available, reserved, or otherwise unavailable. Use balance transactions when you need the history behind a value.