import type { IDataObject } from 'n8n-workflow';
import type { CalculatedRecord, MatchFieldPair, PriceListItem, UsageRecord, OutputFieldConfig } from '../interfaces';
/**
 * Helper function to get a property from an object case-insensitively
 */
export declare function getPropertyCaseInsensitive(obj: Record<string, unknown>, key: string): unknown;
/**
 * Normalise data that may be provided as:
 * - String path to look up on a fallback object
 * - JSON string representing an object or array
 * - Direct object or array (e.g. from an expression)
 */
export declare function normaliseDataInput<T>(input: unknown, fallbackData?: IDataObject): T[];
/**
 * Add match fields from a record to the output
 */
export declare function addMatchFieldsToOutput(outputRecord: CalculatedRecord, sourceRecord: PriceListItem | UsageRecord, matchFields: MatchFieldPair[], fieldType: 'pricelist' | 'usage', prefix: string): void;
/**
 * Add extra fields to the output record
 */
export declare function addExtraFieldsToOutput(outputRecord: CalculatedRecord, priceRecord: PriceListItem, usageRecord: UsageRecord, outputConfig: OutputFieldConfig): void;
/**
 * Sort object keys alphabetically (case-insensitive) and return a new object
 * This ensures consistent field ordering in output records
 */
export declare function sortObjectKeysAlphabetically(record: CalculatedRecord): CalculatedRecord;