/**
 * Money-aware aggregation: exact `sum` / `min` / `max` over money
 * fields.
 *
 * The generic reducers (`aggregate/reducers.ts`) read a field via
 * `readNumber`, which coerces a string (the stored scaled-integer form
 * of money, e.g. `'12345'`) to `0` — so an un-wrapped money `sum` would
 * silently return zero. {@link wrapMoneyReducers} rewrites any `sum` /
 * `min` / `max` over a declared money field into a reducer that
 * accumulates per-currency `BigInt` totals of the stored integers, so
 * the result is exact for any magnitude (past `Number.MAX_SAFE_INTEGER`
 * included).
 *
 * Results are currency-aware and never silently mix currencies:
 *   - **fixed** mode → a single exact decimal string.
 *   - **multi** mode → an exact `Record<currency, string>` map.
 *   - **`sum` with `convertTo` + `fx`** → a single exact string, with
 *     each currency converted via BigInt arithmetic (no float).
 *
 * `remove()` is implemented for every money reducer so they participate
 * in incremental live-aggregation and materialized-view maintenance
 * exactly like the generic reducers they replace.
 */
import type { MoneyDescriptor } from './descriptor.js';
import type { AggregateSpec } from '../../with-lookup/aggregate/aggregation.js';
export type FxRates = Record<string, number | string>;
/**
 * Rewrite any `sum` / `min` / `max` reducer over a declared money field
 * into its exact BigInt money-aware equivalent. Other reducers (and
 * reducers over non-money fields) pass through unchanged. Returns a new
 * spec; the input is not mutated.
 */
export declare function wrapMoneyReducers(spec: AggregateSpec, moneyFields: Record<string, MoneyDescriptor>): AggregateSpec;