export type NormalizeResult = {
    ok: true;
    value: string;
} | {
    ok: false;
    error: string;
};
/**
 * Normalize a phone number to E.164 format using Google's libphonenumber
 *
 * This implementation matches the Zapier approach:
 * - International numbers (starting with +) work without country code
 * - Local/national numbers REQUIRE a country code to be specified
 * - Properly validates numbers according to each country's rules
 *
 * @param input - Phone number in any format (with spaces, hyphens, brackets, etc.)
 * @param defaultCountry - Country code (e.g., 'AU', 'US', 'GB', 'NZ') - REQUIRED for local numbers
 * @returns Normalized phone number in E.164 format or error
 *
 * @example
 * normalizePhoneNumberToE164('+61 437 536 808') // { ok: true, value: '+61437536808' }
 * normalizePhoneNumberToE164('0437 536 808', 'AU') // { ok: true, value: '+61437536808' }
 * normalizePhoneNumberToE164('022 045 0450', 'NZ') // { ok: true, value: '+6422045045' }
 * normalizePhoneNumberToE164('0437 536 808') // { ok: false, error: 'Country required...' }
 */
export declare function normalizePhoneNumberToE164(input: string, defaultCountry?: string): NormalizeResult;