Documentation
Core Concepts
Provider
Kupmios

Kupmios

Usage example to initialize Lucid with Kupmios:

import { Lucid, Kupmios } from "@lucid-evolution/lucid";
 
const lucid = await Lucid(
  new Kupmios(
    "http://localhost:1442", // Kupo endpoint
    "http://localhost:1337", // Ogmios endpoint
  ),
  "Preview",
);

If you have API keys

const lucid = await Lucid(
  new Kupmios("http://localhost:1442", "http://localhost:1337", {
    kupoHeader: { "priv-api-key": "<kupo-api-key>" }, // for example: "dmtr-api-key": "<kupo-api-key>"
    ogmiosHeader: { "priv-api-key": "<ogmios-api-key>" },
  }),
  "Preview",
);

Kupmios is a mix of Ogmios (opens in a new tab) and Kupo (opens in a new tab).

Kupmios exposes structured KupmiosError and OgmiosJsonRpcError instances. Callers can inspect the operation, protocol, HTTP status, retryability, retryAfterMs, JSON-RPC code and data, and the original cause without parsing formatted error strings.

Transaction confirmation queries intentionally do not use Kupo's unspent filter. A confirmed transaction remains confirmed when one of its outputs is spent shortly after inclusion.

BlockfrostMaestro