/**
 * Canonical user-facing strings for the Apple Pay Express Checkout flow.
 *
 * These constants cover two categories:
 *   1. Local contact/field validation — fired before any BFF call, no API
 *      message is available.
 *   2. Pre-purchase fallbacks — merchant validation failures, unstructured
 *      network errors, and generic fallback handling when a BFF WalletApiError
 *      is absent or present but not mapped to dedicated frontend copy.
 *
 * Structured BFF errors (EMAIL_COLLISION, PAYMENT_DECLINED, RECAPTCHA_FAILED,
 * etc.) generally are NOT represented here — their user-facing copy comes
 * directly from walletError.message in the API response, so copy changes on
 * the BFF side take effect without a frontend deploy. Unhandled structured
 * BFF errors may still fall back to MSG_PAYMENT_GENERIC_ERROR.
 */
/** Shown when a required Apple Pay contact field is absent. */
export declare const MSG_MISSING_REQUIRED_FIELD = "Missing required field";
/** Shown when the email address format is invalid (matches sma-checkout FormErrorMessages.EMAIL_WRONG_FORMAT). */
export declare const MSG_EMAIL_WRONG_FORMAT = "That email doesn\u2019t look right. Please enter a valid email address.";
/** Shown when the email address exceeds 80 characters (matches sma-checkout FormErrorMessages.MAX_80_CHARS). */
export declare const MSG_EMAIL_TOO_LONG = "This field must be 80 characters or less.";
/** Shown when the billing country is not in the supported list for the offer. */
export declare const MSG_UNSUPPORTED_BILLING_COUNTRY = "Billing country does not match offer price zone";
/**
 * Fallback user-facing message for billing country mismatch when the country
 * name cannot be resolved from the country code.
 */
export declare const BILLING_COUNTRY_MISMATCH_FALLBACK = "Country not supported for this purchase";
/**
 * User-facing message shown as an inlineError on the checkout redirect page
 * when the billing country does not match the offer price zone.
 */
export declare const MSG_BILLING_COUNTRY_MISMATCH_REDIRECT = "This country isn\u2019t supported for this purchase. Try updating your billing address.";
/**
 * Builds a short, user-facing message for a billing country mismatch, suitable
 * for Apple's native payment sheet (~50 char limit).
 *
 * Returns `"[Country] address required"` (e.g. "Taiwan address required") when
 * the country code resolves to a name, otherwise falls back to
 * BILLING_COUNTRY_MISMATCH_FALLBACK.
 */
export declare const buildCountryMismatchMessage: (countryCode: string | undefined) => string;
/**
 * Generic fallback error shown to the user when merchant validation or the
 * purchase call fails. Redirected as an inlineError on the checkout fallback page.
 * Matches sma-checkout GENERIC_ERROR_MSG pattern.
 */
export declare const MSG_PAYMENT_GENERIC_ERROR = "Something went wrong. Please check your payment and billing details and try again or contact us.";
/** Internal ContactValidationError message — not shown to the user directly. */
export declare const MSG_CONTACT_VALIDATION_INTERNAL = "Could not validate Apple Pay contact";