/**
 * KcSigner contains information about `apiKey`, `apiSecret`, `apiPassPhrase`, and `apiKeyVersion`
 * and provides methods to sign and generate headers for API requests.
 */
export declare class KcSigner {
    private readonly apiKey;
    private readonly apiSecret;
    private readonly apiPassphrase;
    private readonly brokerName;
    private readonly brokerPartner;
    private readonly brokerKey;
    constructor(apiKey?: string, apiSecret?: string, apiPassphrase?: string, brokerName?: string, brokerPartner?: string, brokerKey?: string);
    /**
     * Sign the input data with the given key using HMAC-SHA256
     */
    private sign;
    /**
     * Headers method generates and returns a map of signature headers needed for API authorization
     * It takes a plain string as an argument to help form the signature
     */
    headers(plain: string): Record<string, string>;
    /**
     * Generate broker-specific headers including partner verification
     */
    brokerHeaders(plain: string): Record<string, string>;
}