import { KeystoneIbGib_V1 } from '@ibgib/core-gib/dist/keystone/keystone-types.mjs';
/**
 * Checks if a keystone contains a custodian challenge pool for the given provider.
 * Client-safe & server-safe with zero dependencies.
 */
export declare function isSsoProviderLinked({ keystone, providerId }: {
    keystone: KeystoneIbGib_V1 | null | undefined;
    providerId: string;
}): boolean;
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