Post credit notes

type Stripe = {

  token: string;

};

/**

 * Post credit notes

 * Issue a credit note to adjust the amount of a finalized invoice.

 */

export async function main(

  auth: Stripe,

  body: {

    amount?: number;

    credit_amount?: number;

    effective_at?: number;

    expand?: string[];

    invoice: string;

    lines?: {

      amount?: number;

      description?: string;

      invoice_line_item?: string;

      quantity?: number;

      tax_amounts?:

        | {

            amount: number;

            tax_rate: string;

            taxable_amount: number;

            [k: string]: unknown;

          }[]

        | "";

      tax_rates?: string[] | "";

      type: "custom_line_item" | "invoice_line_item";

      unit_amount?: number;

      unit_amount_decimal?: string;

      [k: string]: unknown;

    }[];

    memo?: string;

    metadata?: { [k: string]: string };

    out_of_band_amount?: number;

    reason?:

      | "duplicate"

      | "fraudulent"

      | "order_change"

      | "product_unsatisfactory";

    refund?: string;

    refund_amount?: number;

    shipping_cost?: { shipping_rate?: string; [k: string]: unknown };

  }

) {

  const url = new URL(`https://api.stripe.com/v1/credit_notes`);

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "Content-Type": "application/x-www-form-urlencoded",

      Authorization: "Bearer " + auth.token,

    },

    body: encodeParams(body),

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}

function encodeParams(o: any) {

  function iter(o: any, path: string) {

    if (Array.isArray(o)) {

      o.forEach(function (a) {

        iter(a, path + "[]");

      });

      return;

    }

    if (o !== null && typeof o === "object") {

      Object.keys(o).forEach(function (k) {

        iter(o[k], path + "[" + k + "]");

      });

      return;

    }

    data.push(path + "=" + o);

  }

  const data: string[] = [];

  Object.keys(o).forEach(function (k) {

    if (o[k] !== undefined) {

      iter(o[k], k);

    }

  });

  return new URLSearchParams(data.join("&"));

}