/** Legacy variables that must no longer select a client database. */
export declare const LOCAL_PATH_VARS: readonly ["HASNA_DOMAINS_DB_PATH", "DOMAINS_DB_PATH", "HASNA_DOMAINS_DIR", "DOMAINS_DIR"];
export type LocalOptInEnv = Record<string, string | undefined>;
/** The first local-path var this env sets, or undefined when none is set. */
export declare function explicitLocalPathVar(env?: LocalOptInEnv): string | undefined;
/** Every env name that can configure a domains authority or credential, resolver-derived. */
export declare function domainsAuthorityEnvKeys(): string[];
/** Refuse obsolete local database configuration without exposing its value. */
export declare function assertDomainsClientStorage(env?: LocalOptInEnv): void;
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