import type { FilterParams, NostrFilter } from './types.js';
/**
 * Build a d-tag from type and identifier.
 * Type values must not contain colons — the first colon is the delimiter.
 */
export declare function buildDTag(type: string, identifier: string): string;
/**
 * Build a d-tag for an assertion-only attestation.
 * Uses the `assertion:` prefix followed by the assertion reference.
 */
export declare function buildAssertionDTag(ref: string): string;
/**
 * Parse a d-tag into type and identifier.
 * Returns null if the d-tag does not contain a colon.
 * For assertion-only attestations (prefix `assertion:`), type is the string "assertion".
 */
export declare function parseDTag(dTag: string): {
    type: string;
    identifier: string;
} | null;
/** Build a Nostr relay filter for querying attestation events. */
export declare function attestationFilter(params: FilterParams): NostrFilter;
/** Build a Nostr relay filter for fetching the latest version of a specific attestation (for revocation checking). */
export declare function revocationFilter(type: string, identifier: string): NostrFilter;
/** Build a Nostr relay filter for an assertion-only attestation by its reference. */
export declare function revocationFilter(options: {
    assertionId?: string;
    assertionAddress?: string;
}): NostrFilter;
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