The Doctor

Austin Linux and Doctor Who Geek!

[Charli3 Oracles 📍Reliable, Secure, Trusted @Oraclecharli3]

#13

SYNCAI — Team Syncai

charli3-js is the first TypeScript SDK for the Charli3 oracle on Cardano. Until now the only official SDK was in Python, which is fine for backend scripts but useless if you're building a Next.js dapp, an AI agent (Masumi, Claude, OpenAI, etc), or anything that runs in a browser.

Published to npm: npm install charli3-js.

Full docs: https://t.co/77YFNO4lUS

With charli3-js you can read the live price and, more importantly, pull a fresh one onto chain in a single call. submitRound2(lucid, "ADA/USD") collects signed quotes from the Charli3 feed nodes, runs IQR consensus, and posts a fresh aggregate tx to Cardano. That is the whole pull oracle flow in one line. The SDK handles the Lucid plumbing, CBOR encoding, Ed25519 sig checks, and slot-rounded datum internally so you do not have to think about any of it.

npm install charli3-js, three method calls, and you have a working pull oracle integration within minutes. A very clean dev experience as any TypeScript library, running everywhere JS runs: React Server Components, Lucid in the browser, Node routes, LLM tool calls.

Framework:
- getPrice(pair) reads the classic push oracle feed.
- getOdvReference(pair) reads the on-chain ODV pull-oracle aggregate, including freshness.
- submitRound2(lucid, pair) pulls signed quotes from Charli3 feed nodes, runs IQR consensus, and posts a fresh aggregate tx to Cardano in one call.

To prove it works end-to-end I wrote an Aiken price_gated_payout validator and a live Next.js demo on Vercel: connect Lace ‚Üí deposit 3 tADA ‚ refresh the ODV price on chain (Round-2) ‚ claim, all gated by a real oracle reading. I also shipped a GPT-4o-mini AI agent that settles USD invoices in ADA by calling the SDK as a tool, and a skill.md spec so any LLM can plug the oracle into its tool loop.

🎥 https://t.co/3Ixt1V7lnh 🔗
Code: https://t.co/PrCsV19HkF
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