import { Observable } from 'rxjs';
import { RpcError } from '../common/error';
/**
 * Converts a non-reactive gRPC error to an error type provided by this package.
 * @param error The error to be converted.
 */
export declare function toReactiveError(error: unknown): RpcError;
/**
 * Converts a gRPC error provided by this package, or a generic non-gRPC error, to an error type understood by gRPC.
 * A non-gRPC error is treated as "unknown" and details are discarded due to security concerns.
 * @param error The error to be converted.
 */
export declare function toNonReactiveError(error: unknown): {
    code: number;
    message: string;
};
/**
 * Maps an observable to a new observable whose errors are converted with the help of a mapping function.
 * @param observable Observable to be mapped.
 * @param mappingFunction Error type mapping function.
 */
export declare function mapObservableErrors<T>(observable: Observable<T>, mappingFunction: (err: unknown) => unknown): Observable<T>;