Crossmint Signers

A minimal standalone implementation of the Crossmint signer functionality for Trusted Execution Environment (TEE) communications. This library provides cryptographic utilities supporting Solana and EVM chains.

Features

• Minimal External Dependencies: Implementation with minimal external dependencies (just Zod) for maximum security
• Subresource Integrity (SRI): Scripts include integrity hashes to prevent tampering
• Multi-Chain Support: Compatible with both Solana (ed25519) and Ethereum (secp256k1) chains
• TEE Communication: Secure communication with Trusted Execution Environments
• TypeScript Support: Fully typed codebase for improved development experience

Security

This implementation is designed for secure environments:

• No external network calls except explicit API interactions
• Runs completely in the browser or secure container
• Uses browser's native crypto APIs
• Includes SRI (Subresource Integrity) hashes in script tags for tamper protection

Setup

pnpm install

Development

pnpm dev

Testing

pnpm test:coverage

License

MIT

Frames Testing App

A simple Next.js application for testing iframe communication using MessageChannel. This app demonstrates how to establish a secure communication channel between a parent window and an iframe, which is useful for implementing sandboxed functionality or integrating with third-party services.

Features

• MessageChannel-based Communication: Implements a secure communication channel between the parent app and iframe
• Request-Response Pattern: Demonstrates a simple request-response pattern for message signing
• Message Logging: Real-time display of all messages exchanged between the parent and iframe
• Event-driven Architecture: Uses a clean event-driven approach for handling messages

Getting Started

Prerequisites

• Node.js 18 or higher
• pnpm (preferred) or npm

Installation

1. Clone the repository

git clone <repository-url>
cd frames-testing-app

2. Install dependencies

pnpm install

3. Run the development server

pnpm dev

4. Open http://localhost:3000 with your browser to see the result.

How It Works

The application consists of two main parts:

1. Parent Application (Next.js): Contains the control panel and hosts the iframe
2. Mock Iframe: A simple HTML page that communicates with the parent