/**
 * Compile-time-only type-accuracy check for SDK 0.59.0's coin PURCHASE surface
 * (spec 2026-07-27-gc-coins-purchase).
 *
 * Same contract as the other `*.typecheck.ts` files: no runtime assertions,
 * never imported by index.ts, not matched by `bun:test` — it exists so
 * `bun run typecheck` / `bun run build` fails loudly if these types drift from
 * the wire contract in apps/api (`routes/coins.ts`, `routes/checkout.ts`).
 * Test files live outside tsc's scope (tsconfig `exclude`), so shape checks
 * that must be enforced by the COMPILER belong here, not in coins.test.ts.
 *
 * What is pinned:
 *  - `CoinWallet.coinCurrency` / `.minPurchase` / `.maxPurchase` are REQUIRED —
 *    `/coins/me` merges COIN_CONFIG_DEFAULTS server-side, so they always ship.
 *    Optional would push a pointless `?? "RUB"` into every purchase form.
 *  - `CoinPurchaseResult` / `CoinPurchaseStatus` / `CoinTransaction` match the
 *    route projections field-for-field (excess-property checks on the literals
 *    catch both a missing field and one that should not be there).
 *  - The coin fields on the checkout surfaces are OPTIONAL — every one of them
 *    is absent on the RUB rails, and `coinsUsed`/`newCoinBalance` are absent
 *    even on the coins rail for an already-processed replay / failed read.
 */
import type { CheckoutRequest, CheckoutResponse, CoinPriceChangedDetails, CoinPurchaseResult, CoinPurchaseStatus, CoinTransaction, CompleteWithBalanceResult, InsufficientCoinsDetails } from "./types";
export declare const _typecheckOnly: {
    _insufficientWithBalance: InsufficientCoinsDetails;
    _insufficientUnknownBalance: InsufficientCoinsDetails;
    _insufficientCoinsCurrencyIsRequired: true;
    _priceChanged: CoinPriceChangedDetails;
    _walletDenominationIsRequired: true;
    _purchase: CoinPurchaseResult;
    _purchaseWithoutUrl: CoinPurchaseResult;
    _status: CoinPurchaseStatus;
    _spend: CoinTransaction;
    _credit: CoinTransaction;
    _rubCompletion: CompleteWithBalanceResult;
    _coinCompletion: CompleteWithBalanceResult;
    _coinCheckoutRequest: CheckoutRequest;
    _coinCheckoutResponse: CheckoutResponse;
};