import type { BendAllowanceInput, BendAllowanceResult } from './types.js';
/**
 * Calculate bend allowance and related bending parameters.
 *
 * Bend Allowance (BA) = (bend angle in radians) x (inside radius + K-factor x thickness)
 * Outside Setback (OSSB) = (inside radius + thickness) x tan(bend angle / 2)
 * Bend Deduction (BD) = 2 x OSSB - BA
 *
 * @param input - Bend allowance input parameters
 * @returns BendAllowanceResult with BA, BD, OSSB, K-factor, recommended V-die, min bend radius
 */
export declare function bendAllowance(input: BendAllowanceInput): BendAllowanceResult;
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