import type { IExecuteFunctions } from 'n8n-workflow';
import { TosClient } from '@volcengine/tos-sdk';
import type { IOperationExecutor, IOperationResult } from './types';
export declare abstract class BaseOperation implements IOperationExecutor {
    protected operationName: string;
    constructor(operationName: string);
    abstract execute(this: IExecuteFunctions, client: TosClient, itemIndex: number, credentials: {
        accessKey: string;
        secretKey: string;
        bucket: string;
        region: string;
        endpoint: string;
    }): Promise<any>;
    safeExecute(executeFunctions: IExecuteFunctions, client: TosClient, itemIndex: number, credentials: {
        accessKey: string;
        secretKey: string;
        bucket: string;
        region: string;
        endpoint: string;
    }): Promise<IOperationResult>;
    protected getErrorContext(executeFunctions: IExecuteFunctions, itemIndex: number): {
        filePath?: string;
        bucket?: string;
    };
    protected getCommonParams(executeFunctions: IExecuteFunctions, itemIndex: number): {
        filePath: string;
        bucket?: string;
    };
    protected generateFileUrl(bucket: string, region: string, filePath: string): string;
    protected generatePreSignedUrl(client: TosClient, bucket: string, filePath: string, method?: 'GET' | 'PUT', expires?: number): Promise<string>;
    protected validateRequiredParams(executeFunctions: IExecuteFunctions, params: any, requiredFields: string[]): void;
}