import { CTYunZone, ReqOptionProps } from '../../types/CTYun';
export declare class CTYunInstance {
    private accessKey;
    private secretKey;
    constructor(accessKey: string, secretKey: string);
    getUploadInfo(bucket: string, zone: CTYunZone, key?: string): {
        key: string;
        accessKey: string;
        policy: string;
        signature: string;
        uploadHost: string;
        bucket: string;
    };
    getSignInfo(bucket: string): {
        encodePolicy: string;
        signature: string;
    };
    private base64ToUrlSafe;
    private hmacSha1;
    private urlSafeBase64Encode;
    removeFile(bucket: string, zone: CTYunZone, key: string): Promise<void>;
    isExistObject(srcBucket: string, zone: CTYunZone, srcKey: string): Promise<boolean>;
    getAuthorization(reqOptions: ReqOptionProps, zone: CTYunZone): string;
    private getSignatureKey;
    private buildCanonicalRequest;
    private buildCanonicalQueryString;
    private calculatePayloadHash;
    /**
  * 获取预签名对象URL（统一接口）
  * 生成天翼云对象的预签名访问URL（兼容 AWS S3 Signature V4）
  */
    presignObjectUrl(method: 'GET' | 'PUT' | 'POST' | 'DELETE', bucket: string, zone: CTYunZone, key: string, options?: {
        expires?: number;
        contentType?: string;
    }): Promise<{
        url: string;
        headers?: Record<string, string | string[]>;
        formdata?: Record<string, any>;
    }>;
}