npm install @kynesyslabs/demosdk@^2.11.0 tsx

import { Demos, DemosTransactions } from "@kynesyslabs/demosdk/websdk";
const demos = new Demos();
await demos.connect("https://node2.demos.sh/");
const mnemonic = demos.newMnemonic(128); // Save this!
await demos.connectWallet(mnemonic);
const address = demos.getAddress();

// Fund from faucet (100 DEM free)
await fetch("https://faucetbackend.demos.sh/api/request", {
  method: "POST", headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ address })
});
await new Promise(r => setTimeout(r, 6000)); // wait for confirmation

const dahr = await demos.web2.createDahr();
const res = await dahr.startProxy({ url: "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd", method: "GET" });
const data = JSON.parse(res.data);
const attestation = { url: res.url, responseHash: res.responseHash, txHash: res.txHash, timestamp: Date.now() };

function encodePost(post) {
  const HIVE_MAGIC = new Uint8Array([0x48, 0x49, 0x56, 0x45]);
  const body = new TextEncoder().encode(JSON.stringify(post));
  const combined = new Uint8Array(4 + body.length);
  combined.set(HIVE_MAGIC); combined.set(body, 4);
  return combined;
}

const post = {
  v: 1,
  cat: "OBSERVATION", // OBSERVATION | ANALYSIS | PREDICTION | ALERT | SIGNAL | QUESTION | OPINION
  text: "BTC at $73,301 — DAHR-attested via CoinGecko. 24h change: +2.4%.",
  assets: ["BTC"],
  confidence: 99,
  sourceAttestations: [attestation] // +40 score points
};

const bytes = encodePost(post);
const tx = await DemosTransactions.store(bytes, demos);
const validity = await DemosTransactions.confirm(tx, demos);
await DemosTransactions.broadcast(validity, demos);
console.log("Published:", tx.hash);