import type { NormalizedConfig, RequestBody, SignatureResult, TikTokShopConfig, TokenResponse } from '../types';
export default class TikTokShop {
    readonly config: NormalizedConfig;
    constructor(config?: TikTokShopConfig);
    /**
     * Accept camelCase and snake_case; normalize to snake_case for internal APIs.
     */
    static normalizeConfig(config?: TikTokShopConfig): NormalizedConfig;
    /**
     * Generate signature from a full TikTok Shop API URL.
     */
    signByUrl(url?: string, body?: RequestBody): SignatureResult;
    /**
     * Generate signature from path + optional query params (config-based).
     */
    sign(path: string, extraParams?: Record<string, unknown>): SignatureResult;
    /**
     * Exchange auth code for access token.
     */
    authCodeToken(authCode: string): Promise<TokenResponse>;
    /**
     * Refresh access token using a refresh token.
     */
    refreshToken(refreshToken: string): Promise<TokenResponse>;
}
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