Integrando com Next.js

HUSKPAY_API_URL=https://api.loja.gg/storefront/v1
HUSKPAY_PUBLISHABLE_KEY=hk_test_pub_xxxxxxxx
HUSKPAY_SECRET_KEY=hk_test_sec_xxxxxxxx
HUSKPAY_WEBHOOK_SECRET=whsec_xxxxxxxx
NEXT_PUBLIC_SITE_URL=http://localhost:3000

import 'server-only';

const BASE = process.env.HUSKPAY_API_URL!;

export type Envelope<T> = {
  data: T;
  livemode: boolean;
  request_id: string;
  has_more?: boolean;
  next_cursor?: string;
};

export class HuskpayError extends Error {
  constructor(
    readonly status: number,
    readonly code: string,
    readonly type: string,
    message: string,
    readonly param?: string,
    readonly requestId?: string,
  ) {
    super(message);
    this.name = 'HuskpayError';
  }
}

type Options = RequestInit & {
  /** 'secret' só em código que nunca chega ao browser. */
  key?: 'publishable' | 'secret';
  idempotencyKey?: string;
  customerToken?: string;
};

export async function huskpay<T>(path: string, opts: Options = {}): Promise<Envelope<T>> {
  const { key = 'publishable', idempotencyKey, customerToken, ...init } = opts;

  const token =
    key === 'secret'
      ? process.env.HUSKPAY_SECRET_KEY
      : process.env.HUSKPAY_PUBLISHABLE_KEY;

  if (!token) throw new Error(`Chave ${key} não configurada no ambiente.`);

  const headers = new Headers(init.headers);
  headers.set('Authorization', `Bearer ${token}`);
  headers.set('Accept', 'application/json');
  if (init.body) headers.set('Content-Type', 'application/json');
  if (idempotencyKey) headers.set('Idempotency-Key', idempotencyKey);
  if (customerToken) headers.set('X-Huskpay-Customer-Token', customerToken);

  const res = await fetch(`${BASE}${path}`, { ...init, headers });

  if (!res.ok) {
    let body: any = null;
    try { body = await res.json(); } catch {}
    throw new HuskpayError(
      res.status,
      body?.error?.code ?? 'unknown_error',
      body?.error?.type ?? 'api_error',
      body?.error?.message ?? `Falha na API (${res.status}).`,
      body?.error?.param,
      body?.request_id,
    );
  }

  return res.json();
}