import { ObservationState, ReducerMessage } from '@cratis/chronicle.contracts';
/** Sentinel sequence number sent back when no event was successfully processed. */
export declare const SEQUENCE_NUMBER_UNAVAILABLE = 4294967295n;
/**
 * Accumulates the result of reducing one reduce operation: the state, the failure details and the
 * last event that was successfully reduced.
 */
export declare class ReductionOutcome {
    state: ObservationState;
    lastSuccessfullyObservedEvent: bigint;
    readonly exceptionMessages: string[];
    exceptionStackTrace: string;
    currentState: unknown;
    /** Gets whether the reduction has failed. */
    get failed(): boolean;
    /** Records a failure of the reduction. */
    recordFailure(error: unknown): void;
    /** Records a failure to notify of a replay lifecycle transition. */
    recordReplayNotificationFailure(error: unknown): void;
    /** Records a failure to activate the reducer or to complete its activation. */
    recordActivationFailure(error: unknown): void;
    /** Creates the result message reported back to the kernel. */
    toMessage(partition: string): ReducerMessage;
}
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