UMA REST API

import { createHash, createHmac } from "node:crypto";

const key = process.env.BRAVADO_API_KEY;
const secret = process.env.BRAVADO_API_SECRET;
if (!key || !secret) throw new Error("Set BRAVADO_API_KEY and BRAVADO_API_SECRET");

const url = new URL("https://partner-api.bravadotrade.com/uma/recent");
url.searchParams.set("limit", "1");
url.searchParams.sort();
const timestamp = String(Date.now());
const requestTarget = url.pathname + url.search;
const bodyHash = createHash("sha256").update("").digest("hex");
const payload = [timestamp, "GET", requestTarget, bodyHash].join("\n");
const response = await fetch(url, {
  headers: {
    "X-Bravado-API-Key": key,
    "X-Bravado-Timestamp": timestamp,
    "X-Bravado-Signature": createHmac("sha256", secret).update(payload).digest("hex"),
  },
});
console.log("HTTP", response.status);
console.log(await response.json());

{
  "question_id": "0x3281d5f64c96c007212bdc90b29cb51581058dac59a57fc2b98a31fd7abe0538",
  "condition_id": "0x19c79788f1288b497b5305f81b71c3f20db1ae338b049d733dcb09b5d5d352f6",
  "title": "Will Ben Shelton win the 2026 Men's US Open?",
  "answer": "no",
  "settled": true,
  "proposed": {
    "proposer": "0xef3990a7c8fa92d84dce0e7816ca3410820c1d36",
    "answer": "no", "price_raw": "0x00…00",
    "request_ts": 1767385181, "block": 93012001, "tx": "0x42879bd3…", "log_index": 5
  },
  "settled_at": {
    "answer": "no", "price_raw": "0x00…00", "payout": "500800000",
    "request_ts": 1767385181, "block": 93012040, "tx": "0x7c80413d…", "log_index": 9
  },
  "updated_ms": 1789253500123
}