src/workflows/common.js

// Source: https://stackoverflow.com/a/66046176
export const arrayBufferToBase64 = async (data) => {
  // Use a FileReader to generate a base64 data URI
  const base64url = await new Promise((r) => {
    const reader = new FileReader();
    reader.onload = () => r(reader.result);
    reader.readAsDataURL(new Blob([data]));
  });

  /*
  The result looks like
  "data:application/octet-stream;base64,<your base64 data>",
  so we split off the beginning:
  */
  return base64url.split(',', 2)[1]
}