/** A source of domain authority on a 0–100 scale (higher = more authoritative). */
export interface AuthorityProvider {
    /** Authority for a registrable domain; null when unknown/unavailable. */
    authorityFor(domain: string): Promise<number | null>;
}
/**
 * Combines several providers. Returns the MAX non-null score (any source
 * vouching for authority is sufficient evidence). All-null → null → callers
 * apply no moderation (fail-safe). A source that throws is treated as null.
 */
export declare class CompositeAuthorityProvider implements AuthorityProvider {
    private readonly sources;
    constructor(sources: ReadonlyArray<AuthorityProvider>);
    authorityFor(domain: string): Promise<number | null>;
}
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