Direct file uploads

import { createHash } from "node:crypto";
import { readFile } from "node:fs/promises";

const API = "https://api.rootkey.ai/api-v1/platform/files/uploads";
const headers = { "x-api-key": process.env.ROOTKEY_API_KEY, "Content-Type": "application/json" };

async function call(url, init) {
  const res = await fetch(url, init);
  if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);
  return res.status === 204 ? null : res.json();
}

const bytes = await readFile("contract.pdf");

const start = await call(API, {
  method: "POST",
  headers,
  body: JSON.stringify({
    ownerVault: "0xdf67CA8286510997567685c0385ECeAb11C23C92",
    fileName: "contract.pdf",
    size: bytes.length,
    sha256: createHash("sha256").update(bytes).digest("hex"),
    contentType: "application/pdf",
  }),
});

if (start.mode !== "single") throw new Error("This file needs a multipart upload");

// To the storage: the headers ROOTKey returned, and no API key.
const put = await fetch(start.upload.url, { method: "PUT", headers: start.upload.headers, body: bytes });
if (!put.ok) throw new Error(`Storage refused the file: ${put.status} ${await put.text()}`);

const file = await call(`${API}/${start.uploadId}/complete`, { method: "POST", headers });
console.log(file.fileId, file.transactionHash);

{
  "uploadId": "upl_3f2b8c1e5a7d4e9b9c2a1d6e8f0a4b7c",
  "fileId": "0f3c1e77-4b2a-4c1d-9f3e-6a1b2c3d4e5f",
  "mode": "multipart",
  "partSize": 16777216,
  "partCount": 40,
  "expiresAt": "2026-10-14T09:00:00.000Z"
}