import type { DepreciationInput, DepreciationResult } from './types.js';
/**
 * Depreciation schedule by straight-line or declining-balance method.
 *
 * @param input - Asset cost, salvage value, useful life, and method
 * @returns Annual depreciation, year-by-year schedule, and total depreciation
 * @throws RangeError if assetCost <= 0, salvageValue < 0, usefulLife <= 0,
 *   salvageValue >= assetCost, or method is unknown
 */
export declare function depreciation(input: DepreciationInput): DepreciationResult;
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