MPC Session Demo

Overview

This demo showcases a secure wallet implementation using Multi-Party Computation (MPC) and Smart Sessions. It demonstrates how to:

1. Create a cryptographic MPC signer using Silence Labs SDK
2. Set up a Smart Session using Biconomy's AbstractJS
3. Execute transactions through natural language commands

Architecture

The application consists of:

• Frontend: React application with TypeScript and Tailwind CSS
• Backend: Eliza OS agent that processes commands and executes transactions
• Blockchain: Interacts with Base Sepolia testnet through Biconomy's infrastructure

Sequence Diagram

How It Works

1. MPC Signer Initialization

The process starts with initializing an MPC signer, which uses thresholded distributed key generation to create a session signer. This signer is responsible for signing transactions without exposing the real private key.

2. Smart Session Creation

A Smart Session is created using Biconomy's AbstractJS, granting limited permissions to the MPC signer to execute specific transactions (in this case, ERC20 transfers).

3. Session Data Downloading

The session information is downloaded from the frontend. This includes the session ID and the necessary cryptographic data to reconstruct the signer from elizaOS backend.

4. Natural Language Transaction Execution

Users can send simple commands like "send 0.1 ETH to 0xABC..." to initiate transactions. The backend parses these commands, reconstructs the MPC signer, and executes the transaction using the pre-authorized session.

Security Features

• Limited Permissions: Smart Sessions restrict what transactions the session can execute.
• Time-Limited Access: Sessions can be configured to expire after a certain time.
• Threshold Cryptography: Uses 2-of-3 MPC for enhanced security.

Getting Started

Prerequisites

• Node.js v16+
• Access to Base Sepolia testnet
• A wallet with Base Sepolia ETH for gas

Setup

1. Clone this repository
2. Install dependencies:

   npm install
   

3. Start the development server:

   npm run dev
   

4. Ensure the backend Eliza OS agent is running and configured properly(link to ElizaOS github repo here Link)

Usage Flow

1. Click "Initialize MPC Signer" to set up the cryptographic infrastructure
2. Click "Create Smart Session" to establish session permissions
3. Click "Download session info" to download the session data
4. chat window will open, where you can enter commands like "send 0.1 ETH to 0xABC..."
5. The backend will process the command, reconstruct the MPC

Technical Stack

• Frontend: React, TypeScript, Tailwind CSS
• Blockchain Integration:
  • Biconomy AbstractJS for Smart Accounts and Smart Sessions
  • Viem for blockchain interactions
• Cryptography: Silence Labs SDK for MPC key generation and signing
• Backend: Eliza OS agent for command processing

Important Notes

• This is a demo application
• Uses Base Sepolia testnet for all blockchain interactions

Resources

• Biconomy AbstractJS Documentation
• Viem Documentation
• Base Sepolia Testnet
• For more details check SL documentation