import { ConfigService } from '@nestjs/config';
import { DataSyncCommandSfnEvent, StepFunctionStateInput } from '../command-events/data-sync.sfn.event';
import { S3Service } from '../data-store';
import { CommandModel, CommandModuleOptions, DetailKey } from '../interfaces';
import { SnsService } from '../queue';
import { StepFunctionService } from '../step-func/step-function.service';
import { CommandService } from './command.service';
import { DataService } from './data.service';
import { HistoryService } from './history.service';
export declare class CommandEventHandler {
    private readonly options;
    private readonly commandService;
    private readonly dataService;
    private readonly historyService;
    private readonly s3Service;
    private readonly snsService;
    private readonly config;
    private readonly sfnService;
    private readonly logger;
    private readonly alarmTopicArn;
    constructor(options: CommandModuleOptions, commandService: CommandService, dataService: DataService, historyService: HistoryService, s3Service: S3Service, snsService: SnsService, config: ConfigService, sfnService: StepFunctionService);
    execute(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput | StepFunctionStateInput[]>;
    protected handleStepState(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput | StepFunctionStateInput[]>;
    protected waitConfirmToken(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    /**
     * Retry wrapper around commandService.getItem for the cross-execution
     * predecessor-status check in waitConfirmToken. Bounded and short —
     * smooths a single transient DDB failure; does not wait out an outage.
     */
    protected getItemWithRetry(key: DetailKey, options: {
        consistentRead: boolean;
    }, maxAttempts: number, baseDelayMs: number): Promise<CommandModel>;
    /**
     * Bounded retry with exponential backoff (baseDelayMs * 2^(attempt - 1)),
     * rethrowing the last error once every attempt is exhausted. Shared by both
     * sides of the version handshake so the pull path (waitConfirmToken) and the
     * push path (checkNextToken) tolerate transient DynamoDB failures equally.
     */
    protected withRetry<T>(fn: () => Promise<T>, maxAttempts: number, baseDelayMs: number): Promise<T>;
    protected checkVersion(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    protected setTtlCommand(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    protected historyCopy(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    protected transformData(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput[]>;
    protected syncData(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    protected checkNextToken(event: DataSyncCommandSfnEvent): Promise<StepFunctionStateInput>;
    protected handleResumeExecutionError(event: DataSyncCommandSfnEvent, e: unknown, options: {
        benignNames: ReadonlySet<string>;
        logContext: string;
        alarmPayload: Record<string, unknown>;
    }): Promise<void>;
    /**
     * Best-effort alarm publish — SNS failure must not fail the SFN step
     * (e.g. after updateTaskToken already succeeded).
     */
    protected publishAlarmSafely(event: DataSyncCommandSfnEvent, errorDetails: any): Promise<void>;
    protected publishAlarm(event: DataSyncCommandSfnEvent, errorDetails: any): Promise<void>;
}