Base64 Without File System

base64_no_fs.js

const { Readable } = require("stream");
const FormData = require("form-data");
const axios = require("axios");

(async () => {
  try {
    const base64 = "BASE64 FILE STRING;
    const imgBuffer = Buffer.from(base64, "base64");

    const stream = Readable.from(imgBuffer);
    const data = new FormData();
    data.append('file', stream, {
      filepath: 'FILENAME.png'
    })

    const res = await axios.post("https://api.pinata.cloud/pinning/pinFileToIPFS", data, {
      maxBodyLength: "Infinity",
      headers: {
          'Content-Type': `multipart/form-data; boundary=${data._boundary}`,
          pinata_api_key: pinataApiKey,
          pinata_secret_api_key: pinataSecretApiKey
      }
    });

    console.log(res.data);
  } catch (error) {
    console.log(error);
  }
})();