Ledger lite
- Read the amount, the date and the counterparty off whatever was handed over.
- Append one row to
ledger.csvin that order. Stop when the row is written. - Print the new balance, with the currency, on its own line.
When to open which reference
format.md holds the column order and the rounding rule. Open it before writing a row; the input's own layout never decides the column order.