interface SignatureOptions {
    method: string;
    url: string;
    headers: Record<string, string>;
    body?: Buffer | string;
    accessKeyId: string;
    secretAccessKey: string;
    region: string;
    service: string;
}
export declare class AwsSignatureV4 {
    private static readonly algorithm;
    private static readonly signedHeaders;
    static sign(options: SignatureOptions): Record<string, string>;
    static signUrl(options: SignatureOptions & {
        expiresIn: number;
    }): string;
    private static createCanonicalRequest;
    private static getSigningKey;
    private static hash;
    private static hmac;
}
export {};