Module logical 

Pure, DB-free logical→physical transaction lowering.

This module is the single source of truth for the from→to FX math used by every client surface (CLI, TUI, web) and the upcoming B2b RPC native. No database calls, no async.

Structs

LogicalSplit

A from→to exchange; to_amount is required iff from_commodity != to_commodity.

PhysicalSplit

One physical ledger entry.

PriceRow

One price-table row linking two physical splits.

Functions

lower_logical_split

Lower one logical split to two physical splits and an optional price row.

lower_logical_transaction

Lower a non-empty slice of logical splits into physical splits and price rows.