@lit-protocol/fss-signer v0.1.0-13

@lit-protocol/fss-signer

Secure transaction signing implementation for Lit AI Agents using Lit Protocol's Programmable Key Pairs (PKPs).

Features

• Secure key management through Lit Protocol's PKP system
• Transaction signing for multiple chains
• Automatic capacity credit management
• Local storage for PKP and capacity credit persistence

Installation

pnpm add @lit-protocol/fss-signer

Usage

import { AgentSigner } from '@lit-protocol/fss-signer';

// Create a new signer instance
const signer = await AgentSigner.create(
  'your-auth-private-key',
  {
    litNetwork: 'datilTest',
    debug: false
  }
);

// Sign a transaction
const signedTx = await signer.signTransaction({
  to: '0x...',
  value: '1000000000000000000',
  data: '0x...'
});

Architecture

The signer works by: 1. Connecting to Lit Protocol network 2. Managing PKP minting and storage 3. Handling capacity credits for rate limiting 4. Providing secure transaction signing

Security Features

• Secure key storage through Lit Protocol's PKP system
• Automatic balance checks for auth wallet
• Persistent storage of PKP and capacity credits
• Network-specific configurations

API Reference

AgentSigner

Main class for handling secure transaction signing.

Static Methods

create()

static async create(
  authPrivateKey: string,
  options?: {
    litNetwork?: LIT_NETWORKS_KEYS;
    debug?: boolean;
  }
): Promise<AgentSigner>

Creates a new AgentSigner instance with the specified configuration.

Instance Methods

signTransaction()

async signTransaction(
  transaction: ethers.providers.TransactionRequest
): Promise<string>

Signs an Ethereum transaction using the agent's PKP.

signMessage()

async signMessage(message: string): Promise<string>

Signs a message using the agent's PKP.

License

MIT