import { VerificationCheck } from '../../types/check.js';
/**
 * Problem `type` URI for an expired credential.
 *
 * Uses the same `https://www.w3.org/TR/vc-data-model#...` placeholder host
 * as the rest of the catalog (see {@link ../../problem-types.ts}); treat it
 * as an opaque key until a real error registry exists. Kept as a standalone
 * constant rather than mirrored into the core `ProblemTypes` map because the
 * validity suite is opt-in (passed via `additionalSuites`), following the
 * same "vertical catalogs live with their suite" convention as the
 * OpenBadges submodule.
 */
export declare const EXPIRED_PROBLEM_TYPE = "https://www.w3.org/TR/vc-data-model#CREDENTIAL_EXPIRED";
/**
 * Machine-readable `code` values carried on this check's `'skipped'`
 * outcomes. Branch on these rather than on the prose `reason` -- the three
 * causes are not interchangeable: `noExpiration` means the credential
 * genuinely never expires, while `unparseableDate` means an expiry exists
 * but could not be evaluated (an issuer defect a consumer may well want to
 * surface as a warning rather than a pass).
 */
export declare const EXPIRATION_SKIP_CODES: {
    /** The subject carried no verifiable credential. */
    readonly noCredential: "no-credential";
    /** The credential has no `validUntil` / `expirationDate`. */
    readonly noExpiration: "no-expiration";
    /** An expiry value exists but does not parse as a date. */
    readonly unparseableDate: "unparseable-date";
};
/**
 * Credential expiration check.
 *
 * Reads the credential's expiry off `validUntil` (VC 2.0) or `expirationDate`
 * (VC 1.x) and compares it against "now". This is a non-fatal informational
 * check: an expired credential is reported as a warning, not a hard
 * cryptographic failure.
 *
 * "Now" is read from the injected clock -- `context.timeService.dateNowMs()`
 * when present, else `Date.now()` -- so the check is deterministic under a
 * fake time service in tests.
 *
 * Skipped when (each cause tagged with its {@link EXPIRATION_SKIP_CODES}
 * entry on the outcome's `code`):
 * - No credential in the subject (`no-credential`).
 * - Credential has no expiration date (`no-expiration`).
 * - The expiration date is not a valid date (`unparseable-date`).
 *
 * Success when:
 * - The credential is within its validity period.
 *
 * Failure ({@link EXPIRED_PROBLEM_TYPE}) when:
 * - The expiration instant is in the past.
 */
export declare const expirationCheck: VerificationCheck;
//# sourceMappingURL=expiration-check.d.ts.map