Recipe: stablecoin monitor

curl -s "https://farbeamlabs.com/api/v1/markets/stablecoins" \
  | jq -r '.data.assets[:10][] | [.symbol, .price, .circulating_usd, .change_7d_pct] | @tsv'

// stable.mjs: run with node stable.mjs
const API = "https://farbeamlabs.com/api/v1";
const get = async (path) => {
  const { data, error } = await (await fetch(API + path)).json();
  if (error) throw new Error(`${error.code}: ${error.message}`);
  return data;
};
const money = (n) => `$${Math.round(n).toLocaleString("en-US")}`;

const { assets, chains } = await get("/markets/stablecoins");
for (const asset of assets.slice(0, 10)) {
  const offPeg = asset.price === null ? null : Math.abs(asset.price - 1);
  const flag = offPeg !== null && offPeg > 0.005 ? "  price is more than 0.5% from $1" : "";
  console.log(asset.symbol.padEnd(8), money(asset.circulating_usd).padStart(20), `${asset.change_7d_pct}% 7d`, flag);
}
console.log("Covered chains:", chains.filter((c) => c.covered).map((c) => `${c.name} ${money(c.circulating_usd)}`).join(", "));

const rows = await get("/transfers?min_usd=1000000&limit=100");
const stable = new Set(["USDC", "USDT", "DAI", "USDbC"]);
for (const row of rows.filter((r) => stable.has(r.token))) {
  if (row.from_label === "Null address") console.log("mint", row.chain, row.token, money(row.usd), row.tx);
  if (row.to_label === "Null address") console.log("burn", row.chain, row.token, money(row.usd), row.tx);
}

# stable.py: run with python3 stable.py
import requests

API = "https://farbeamlabs.com/api/v1"

def get(path, **params):
    body = requests.get(API + path, params=params, timeout=30).json()
    if "error" in body:
        raise RuntimeError(body["error"]["code"])
    return body["data"]

data = get("/markets/stablecoins")
for asset in data["assets"][:10]:
    price = asset["price"]
    flag = "  price is more than 0.5% from $1" if price is not None and abs(price - 1) > 0.005 else ""
    print(f"{asset['symbol']:8} ${asset['circulating_usd']:>18,}  {asset['change_7d_pct']}% 7d{flag}")
print("Covered chains:", [(c["name"], c["circulating_usd"]) for c in data["chains"] if c["covered"]])

for row in get("/transfers", min_usd=1000000, limit=100):
    if row["token"] in ("USDC", "USDT", "DAI", "USDbC"):
        if row["from_label"] == "Null address":
            print("mint", row["chain"], row["token"], round(row["usd"]), row["tx"])
        if row["to_label"] == "Null address":
            print("burn", row["chain"], row["token"], round(row["usd"]), row["tx"])