import { EngineRegistry } from '../../engine/engine-registry.service';
import { LidMappingStoreService } from '../../engine/identity/lid-mapping-store.service';
export declare class SessionLidResolver {
    private readonly engines;
    private readonly lidMappingStore?;
    private readonly cache;
    private static readonly CACHE_MAX;
    constructor(engines: EngineRegistry, lidMappingStore?: LidMappingStoreService | undefined);
    resolveSenderPhone(sessionId: string, contactId: string): Promise<string | null>;
}