/**
 * @pwngh/economy-lab
 *
 * Copyright (c) Preston Neal
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.md file in the root directory of this source tree.
 *
 * @license MIT
 */
/**
 * A growable `BigInt64Array` that pushes and pops one value at a time, like a Vec. Capacity doubles
 * on overflow; `pop` only shrinks the live length, so a rolled-back posting leaves the buffer sized
 * for the next one. `view` is the live prefix — what a fold reads.
 */
export declare class I64Column {
    private buffer;
    private size;
    constructor(capacity?: number);
    get length(): number;
    push(value: bigint): void;
    pop(): void;
    view(): BigInt64Array;
}
/**
 * Sums a column to one balance. Small columns take a plain loop; larger ones fold in WebAssembly,
 * falling back to the same-result `bigint` reference where WebAssembly is unavailable. The fold
 * checks every intermediate against the 64-bit range the ledger stores, so an unstorable running
 * total surfaces as {@link ERROR_CODES.AMOUNT_OVERFLOW} rather than a raw trap.
 */
export declare function foldColumn(column: I64Column): bigint;