Celeste

Wallet-signed DeFAI chat built on Celina SDK.

Creator — reference DeFAI app · 2026 – present

Next.jsAI SDKwagmiCelina SDK

Problem

Celina’s SDK needed a user-facing proof that agents can transact without a server key: the human signs, the model only prepares.

What I built

A chat UI on Celo mainnet: balances, sends, swaps, Aave supply/withdraw, and GoodDollar UBI — you confirm in-wallet.
Composite swap routing that quotes Mento FX, GoodDollar reserve, and Uniswap v4 in parallel and picks the better output.
TxConfirmCard simulation before broadcast, plus MiniPay / CIP-64 fee-currency support.
EIP-8004 agent manifest at celeste.usecelina.xyz/agent.json.

Technical notes

Next.js + Vercel AI SDK + OpenRouter, wagmi + RainbowKit, Dexie for local chat history.
Uses `@andrewkimjoseph/celina-sdk` with `surface: "browser"` — no MCP, no `CELO_PRIVATE_KEY`.
Dual on-chain attribution: legacy UTF-8 suffix plus ERC-8021 `toDataSuffix` codes.
Independent of Celina MCP: same catalog, different host, wallet-native signing.

Related work

Celina

Celo SDK + MCP — give your LLM a wallet on Celo.

Read case →