/**
 * Calculate check digit for eMAID according to eMI³ specification
 * Based on the algorithm described in "Check Digit Calculation for Contract-IDs"
 *
 * This implementation can detect five most frequent error types:
 * 1. Single error: one character is wrong
 * 2. Adjacent transposition: two adjacent characters are swapped
 * 3. Twin error: two identical adjacent characters are both changed
 * 4. Jump transposition: abc becomes cba
 * 5. Jump twin error: aca becomes bcb
 *
 * @param emaidWithoutCheckDigit - The first 14 characters of the eMAID (without check digit)
 * @returns The calculated check digit character
 */
export declare function calculateCheckDigit(emaidWithoutCheckDigit: string): string;