/**
 * Credential Event Extension Schema (v0.11.3+ ZT Pack)
 *
 * Records credential lifecycle events in ext["org.peacprotocol/credential_event"].
 * Events: issued, leased, rotated, revoked, expired.
 *
 * credential_ref is an opaque fingerprint reference: schema validates
 * format only (prefix + hex). Issuers compute values externally; verifiers
 * MUST NOT assume they can recompute the reference.
 */
import { z } from 'zod';
export declare const CREDENTIAL_EVENT_EXTENSION_KEY: "org.peacprotocol/credential_event";
/**
 * Credential lifecycle events
 */
export declare const CREDENTIAL_EVENTS: readonly ["issued", "leased", "rotated", "revoked", "expired"];
export declare const CredentialEventTypeSchema: z.ZodEnum<{
    expired: "expired";
    issued: "issued";
    leased: "leased";
    rotated: "rotated";
    revoked: "revoked";
}>;
export type CredentialEventType = z.infer<typeof CredentialEventTypeSchema>;
export declare const CredentialRefSchema: z.ZodString;
/**
 * Credential Event extension schema
 */
export declare const CredentialEventSchema: z.ZodObject<{
    event: z.ZodEnum<{
        expired: "expired";
        issued: "issued";
        leased: "leased";
        rotated: "rotated";
        revoked: "revoked";
    }>;
    credential_ref: z.ZodString;
    authority: z.ZodString;
    expires_at: z.ZodOptional<z.ZodString>;
    previous_ref: z.ZodOptional<z.ZodString>;
}, z.core.$strict>;
export type CredentialEvent = z.infer<typeof CredentialEventSchema>;
/**
 * Validate a CredentialEvent object.
 */
export declare function validateCredentialEvent(data: unknown): {
    ok: true;
    value: CredentialEvent;
} | {
    ok: false;
    error: string;
};
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